/*******************************************************************************
* Copyright (c) 2000, 2013 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.swt.widgets;
import org.eclipse.swt.*;
import org.eclipse.swt.events.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.internal.*;
import org.eclipse.swt.internal.win32.*;
/**
* This class is the abstract superclass of all user interface objects.
* Widgets are created, disposed and issue notification to listeners
* when events occur which affect them.
* <dl>
* <dt><b>Styles:</b></dt>
* <dd>(none)</dd>
* <dt><b>Events:</b></dt>
* <dd>Dispose</dd>
* </dl>
* <p>
* IMPORTANT: This class is intended to be subclassed <em>only</em>
* within the SWT implementation. However, it has not been marked
* final to allow those outside of the SWT development team to implement
* patched versions of the class in order to get around specific
* limitations in advance of when those limitations can be addressed
* by the team. Any class built using subclassing to access the internals
* of this class will likely fail to compile or run between releases and
* may be strongly platform specific. Subclassing should not be attempted
* without an intimate and detailed understanding of the workings of the
* hierarchy. No support is provided for user-written classes which are
* implemented as subclasses of this class.
* </p>
*
* @see #checkSubclass
* @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
*/
public abstract class Widget {
int style, state;
Display display;
EventTable eventTable;
Object data;
/* Global state flags */
static final int DISPOSED = 1<<0;
static final int CANVAS = 1<<1;
static final int KEYED_DATA = 1<<2;
static final int DISABLED = 1<<3;
static final int HIDDEN = 1<<4;
/* A layout was requested on this widget */
static final int LAYOUT_NEEDED = 1<<5;
/* The preferred size of a child has changed */
static final int LAYOUT_CHANGED = 1<<6;
/* A layout was requested in this widget hierarchy */
static final int LAYOUT_CHILD = 1<<7;
/* Background flags */
static final int THEME_BACKGROUND = 1<<8;
static final int DRAW_BACKGROUND = 1<<9;
static final int PARENT_BACKGROUND = 1<<10;
/* Dispose and release flags */
static final int RELEASED = 1<<11;
static final int DISPOSE_SENT = 1<<12;
/* More global widget state flags */
static final int TRACK_MOUSE = 1<<13;
static final int FOREIGN_HANDLE = 1<<14;
static final int DRAG_DETECT = 1<<15;
/* Move and resize state flags */
static final int MOVE_OCCURRED = 1<<16;
static final int MOVE_DEFERRED = 1<<17;
static final int RESIZE_OCCURRED = 1<<18;
static final int RESIZE_DEFERRED = 1<<19;
/* Ignore WM_CHANGEUISTATE */
static final int IGNORE_WM_CHANGEUISTATE = 1<<20;
/* Notify of the opportunity to skin this widget */
static final int SKIN_NEEDED = 1<<21;
/* Default size for widgets */
static final int DEFAULT_WIDTH = 64;
static final int DEFAULT_HEIGHT = 64;
/* Bidi UCC to enforce text orientation */
static final char LRE = '\u202a';
static final char RLE = '\u202b';
/* Check and initialize the Common Controls DLL */
static final int MAJOR = 5, MINOR = 80;
static {
if (!OS.IsWinCE) {
if (OS.COMCTL32_VERSION < OS.VERSION (MAJOR, MINOR)) {
System.out.println ("***WARNING: SWT requires comctl32.dll version " + MAJOR + "." + MINOR + " or greater"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
System.out.println ("***WARNING: Detected: " + OS.COMCTL32_MAJOR + "." + OS.COMCTL32_MINOR); //$NON-NLS-1$ //$NON-NLS-2$
}
}
OS.InitCommonControls ();
}
/**
* Prevents uninitialized instances from being created outside the package.
*/
Widget () {
}
/**
* Constructs a new instance of this class given its parent
* and a style value describing its behavior and appearance.
* <p>
* The style value is either one of the style constants defined in
* class <code>SWT</code> which is applicable to instances of this
* class, or must be built by <em>bitwise OR</em>'ing together
* (that is, using the <code>int</code> "|" operator) two or more
* of those <code>SWT</code> style constants. The class description
* lists the style constants that are applicable to the class.
* Style bits are also inherited from superclasses.
* </p>
*
* @param parent a widget which will be the parent of the new instance (cannot be null)
* @param style the style of widget to construct
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
* <li>ERROR_INVALID_ARGUMENT - if the parent is disposed</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
* <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li>
* </ul>
*
* @see SWT
* @see #checkSubclass
* @see #getStyle
*/
public Widget (Widget parent, int style) {
checkSubclass ();
checkParent (parent);
this.style = style;
display = parent.display;
reskinWidget ();
}
void _addListener (int eventType, Listener listener) {
if (eventTable == null) eventTable = new EventTable ();
eventTable.hook (eventType, listener);
}
void _removeListener (int eventType, Listener listener) {
if (eventTable == null) return;
eventTable.unhook (eventType, listener);
}
/**
* Adds the listener to the collection of listeners who will
* be notified when an event of the given type occurs. When the
* event does occur in the widget, the listener is notified by
* sending it the <code>handleEvent()</code> message. The event
* type is one of the event constants defined in class <code>SWT</code>.
*
* @param eventType the type of event to listen for
* @param listener the listener which should be notified when the event occurs
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @see Listener
* @see SWT
* @see #getListeners(int)
* @see #removeListener(int, Listener)
* @see #notifyListeners
*/
public void addListener (int eventType, Listener listener) {
checkWidget();
if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
_addListener (eventType, listener);
}
/**
* Adds the listener to the collection of listeners who will
* be notified when the widget is disposed. When the widget is
* disposed, the listener is notified by sending it the
* <code>widgetDisposed()</code> message.
*
* @param listener the listener which should be notified when the receiver is disposed
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @see DisposeListener
* @see #removeDisposeListener
*/
public void addDisposeListener (DisposeListener listener) {
checkWidget();
if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
TypedListener typedListener = new TypedListener (listener);
addListener (SWT.Dispose, typedListener);
}
long /*int*/ callWindowProc (long /*int*/ hwnd, int msg, long /*int*/ wParam, long /*int*/ lParam) {
return 0;
}
/**
* Returns a style with exactly one style bit set out of
* the specified set of exclusive style bits. All other
* possible bits are cleared when the first matching bit
* is found. Bits that are not part of the possible set
* are untouched.
*
* @param style the original style bits
* @param int0 the 0th possible style bit
* @param int1 the 1st possible style bit
* @param int2 the 2nd possible style bit
* @param int3 the 3rd possible style bit
* @param int4 the 4th possible style bit
* @param int5 the 5th possible style bit
*
* @return the new style bits
*/
static int checkBits (int style, int int0, int int1, int int2, int int3, int int4, int int5) {
int mask = int0 | int1 | int2 | int3 | int4 | int5;
if ((style & mask) == 0) style |= int0;
if ((style & int0) != 0) style = (style & ~mask) | int0;
if ((style & int1) != 0) style = (style & ~mask) | int1;
if ((style & int2) != 0) style = (style & ~mask) | int2;
if ((style & int3) != 0) style = (style & ~mask) | int3;
if ((style & int4) != 0) style = (style & ~mask) | int4;
if ((style & int5) != 0) style = (style & ~mask) | int5;
return style;
}
void checkOrientation (Widget parent) {
style &= ~SWT.MIRRORED;
if ((style & (SWT.LEFT_TO_RIGHT | SWT.RIGHT_TO_LEFT)) == 0) {
if (parent != null) {
if ((parent.style & SWT.LEFT_TO_RIGHT) != 0) style |= SWT.LEFT_TO_RIGHT;
if ((parent.style & SWT.RIGHT_TO_LEFT) != 0) style |= SWT.RIGHT_TO_LEFT;
}
}
style = checkBits (style, SWT.LEFT_TO_RIGHT, SWT.RIGHT_TO_LEFT, 0, 0, 0, 0);
}
void checkOpened () {
/* Do nothing */
}
/**
* Throws an exception if the specified widget can not be
* used as a parent for the receiver.
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
* <li>ERROR_INVALID_ARGUMENT - if the parent is disposed</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
* </ul>
*/
void checkParent (Widget parent) {
if (parent == null) error (SWT.ERROR_NULL_ARGUMENT);
if (parent.isDisposed ()) error (SWT.ERROR_INVALID_ARGUMENT);
parent.checkWidget ();
parent.checkOpened ();
}
/**
* Checks that this class can be subclassed.
* <p>
* The SWT class library is intended to be subclassed
* only at specific, controlled points (most notably,
* <code>Composite</code> and <code>Canvas</code> when
* implementing new widgets). This method enforces this
* rule unless it is overridden.
* </p><p>
* <em>IMPORTANT:</em> By providing an implementation of this
* method that allows a subclass of a class which does not
* normally allow subclassing to be created, the implementer
* agrees to be fully responsible for the fact that any such
* subclass will likely fail between SWT releases and will be
* strongly platform specific. No support is provided for
* user-written classes which are implemented in this fashion.
* </p><p>
* The ability to subclass outside of the allowed SWT classes
* is intended purely to enable those not on the SWT development
* team to implement patches in order to get around specific
* limitations in advance of when those limitations can be
* addressed by the team. Subclassing should not be attempted
* without an intimate and detailed understanding of the hierarchy.
* </p>
*
* @exception SWTException <ul>
* <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li>
* </ul>
*/
protected void checkSubclass () {
if (!isValidSubclass ()) error (SWT.ERROR_INVALID_SUBCLASS);
}
/**
* Throws an <code>SWTException</code> if the receiver can not
* be accessed by the caller. This may include both checks on
* the state of the receiver and more generally on the entire
* execution context. This method <em>should</em> be called by
* widget implementors to enforce the standard SWT invariants.
* <p>
* Currently, it is an error to invoke any method (other than
* <code>isDisposed()</code>) on a widget that has had its
* <code>dispose()</code> method called. It is also an error
* to call widget methods from any thread that is different
* from the thread that created the widget.
* </p><p>
* In future releases of SWT, there may be more or fewer error
* checks and exceptions may be thrown for different reasons.
* </p>
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
protected void checkWidget () {
Display display = this.display;
if (display == null) error (SWT.ERROR_WIDGET_DISPOSED);
if (display.thread != Thread.currentThread ()) {
/*
* Bug in IBM JVM 1.6. For some reason, under
* conditions that are yet to be full understood,
* Thread.currentThread() is either returning null
* or a different instance from the one that was
* saved when the Display was created. This is
* possibly a JIT problem because modifying this
* method to print logging information when the
* error happens seems to fix the problem. The
* fix is to use operating system calls to verify
* that the current thread is not the Display thread.
*
* NOTE: Despite the fact that Thread.currentThread()
* is used in other places, the failure has not been
* observed in all places where it is called.
*/
if (display.threadId != OS.GetCurrentThreadId ()) {
error (SWT.ERROR_THREAD_INVALID_ACCESS);
}
}
if ((state & DISPOSED) != 0) error (SWT.ERROR_WIDGET_DISPOSED);
}
/**
* Destroys the widget in the operating system and releases
* the widget's handle. If the widget does not have a handle,
* this method may hide the widget, mark the widget as destroyed
* or do nothing, depending on the widget.
* <p>
* When a widget is destroyed in the operating system, its
* descendants are also destroyed by the operating system.
* This means that it is only necessary to call <code>destroyWidget</code>
* on the root of the widget tree.
* </p><p>
* This method is called after <code>releaseWidget()</code>.
* </p><p>
* See also <code>releaseChild()</code>, <code>releaseWidget()</code>
* and <code>releaseHandle()</code>.
* </p>
*
* @see #dispose
*/
void destroyWidget () {
releaseHandle ();
}
long /*int*/ DeferWindowPos(long /*int*/ hWinPosInfo, long /*int*/ hWnd, long /*int*/ hWndInsertAfter, int X, int Y, int cx, int cy, int uFlags){
if (OS.IsWinCE) {
/*
* Feature in Windows. On Windows CE, DeferWindowPos always causes
* a WM_SIZE message, even when the new size is the same as the old
* size. The fix is to detect that the size has not changed and set
* SWP_NOSIZE.
*/
if ((uFlags & OS.SWP_NOSIZE) == 0) {
RECT lpRect = new RECT ();
OS.GetWindowRect (hWnd, lpRect);
if (cy == lpRect.bottom - lpRect.top && cx == lpRect.right - lpRect.left) {
/*
* Feature in Windows. On Windows CE, DeferWindowPos when called
* with SWP_DRAWFRAME always causes a WM_SIZE message, even
* when SWP_NOSIZE is set and when the new size is the same as the
* old size. The fix is to clear SWP_DRAWFRAME when the size is
* the same.
*/
uFlags &= ~OS.SWP_DRAWFRAME;
uFlags |= OS.SWP_NOSIZE;
}
}
}
return OS.DeferWindowPos (hWinPosInfo, hWnd, hWndInsertAfter, X, Y, cx, cy, uFlags);
}
/**
* Disposes of the operating system resources associated with
* the receiver and all its descendants. After this method has
* been invoked, the receiver and all descendants will answer
* <code>true</code> when sent the message <code>isDisposed()</code>.
* Any internal connections between the widgets in the tree will
* have been removed to facilitate garbage collection.
* This method does nothing if the widget is already disposed.
* <p>
* NOTE: This method is not called recursively on the descendants
* of the receiver. This means that, widget implementers can not
* detect when a widget is being disposed of by re-implementing
* this method, but should instead listen for the <code>Dispose</code>
* event.
* </p>
*
* @exception SWTException <ul>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @see #addDisposeListener
* @see #removeDisposeListener
* @see #checkWidget
*/
public void dispose () {
/*
* Note: It is valid to attempt to dispose a widget
* more than once. If this happens, fail silently.
*/
if (isDisposed ()) return;
if (!isValidThread ()) error (SWT.ERROR_THREAD_INVALID_ACCESS);
release (true);
}
boolean dragDetect (long /*int*/ hwnd, int x, int y, boolean filter, boolean [] detect, boolean [] consume) {
if (consume != null) consume [0] = false;
if (detect != null) detect [0] = true;
POINT pt = new POINT ();
pt.x = x;
pt.y = y;
OS.ClientToScreen (hwnd, pt);
return OS.DragDetect (hwnd, pt);
}
/**
* Does whatever widget specific cleanup is required, and then
* uses the code in <code>SWTError.error</code> to handle the error.
*
* @param code the descriptive error code
*
* @see SWT#error(int)
*/
void error (int code) {
SWT.error(code);
}
boolean filters (int eventType) {
return display.filters (eventType);
}
Widget findItem (long /*int*/ id) {
return null;
}
char [] fixMnemonic (String string) {
return fixMnemonic (string, false);
}
char [] fixMnemonic (String string, boolean spaces) {
char [] buffer = new char [string.length () + 1];
string.getChars (0, string.length (), buffer, 0);
int i = 0, j = 0;
while (i < buffer.length) {
if (buffer [i] == '&') {
if (i + 1 < buffer.length && buffer [i + 1] == '&') {
buffer [j++] = spaces ? ' ' : buffer [i];
i++;
}
i++;
} else {
buffer [j++] = buffer [i++];
}
}
while (j < buffer.length) buffer [j++] = 0;
return buffer;
}
/**
* Returns the application defined widget data associated
* with the receiver, or null if it has not been set. The
* <em>widget data</em> is a single, unnamed field that is
* stored with every widget.
* <p>
* Applications may put arbitrary objects in this field. If
* the object stored in the widget data needs to be notified
* when the widget is disposed of, it is the application's
* responsibility to hook the Dispose event on the widget and
* do so.
* </p>
*
* @return the widget data
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - when the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - when called from the wrong thread</li>
* </ul>
*
* @see #setData(Object)
*/
public Object getData () {
checkWidget();
return (state & KEYED_DATA) != 0 ? ((Object []) data) [0] : data;
}
/**
* Returns the application defined property of the receiver
* with the specified name, or null if it has not been set.
* <p>
* Applications may have associated arbitrary objects with the
* receiver in this fashion. If the objects stored in the
* properties need to be notified when the widget is disposed
* of, it is the application's responsibility to hook the
* Dispose event on the widget and do so.
* </p>
*
* @param key the name of the property
* @return the value of the property or null if it has not been set
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the key is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @see #setData(String, Object)
*/
public Object getData (String key) {
checkWidget();
if (key == null) error (SWT.ERROR_NULL_ARGUMENT);
if ((state & KEYED_DATA) != 0) {
Object [] table = (Object []) data;
for (int i=1; i<table.length; i+=2) {
if (key.equals (table [i])) return table [i+1];
}
}
return null;
}
/**
* Returns the <code>Display</code> that is associated with
* the receiver.
* <p>
* A widget's display is either provided when it is created
* (for example, top level <code>Shell</code>s) or is the
* same as its parent's display.
* </p>
*
* @return the receiver's display
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public Display getDisplay () {
Display display = this.display;
if (display == null) error (SWT.ERROR_WIDGET_DISPOSED);
return display;
}
/**
* Returns an array of listeners who will be notified when an event
* of the given type occurs. The event type is one of the event constants
* defined in class <code>SWT</code>.
*
* @param eventType the type of event to listen for
* @return an array of listeners that will be notified when the event occurs
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @see Listener
* @see SWT
* @see #addListener(int, Listener)
* @see #removeListener(int, Listener)
* @see #notifyListeners
*
* @since 3.4
*/
public Listener[] getListeners (int eventType) {
checkWidget();
if (eventTable == null) return new Listener[0];
return eventTable.getListeners(eventType);
}
Menu getMenu () {
return null;
}
/**
* Returns the name of the widget. This is the name of
* the class without the package name.
*
* @return the name of the widget
*/
String getName () {
String string = getClass ().getName ();
int index = string.lastIndexOf ('.');
if (index == -1) return string;
return string.substring (index + 1, string.length ());
}
/*
* Returns a short printable representation for the contents
* of a widget. For example, a button may answer the label
* text. This is used by <code>toString</code> to provide a
* more meaningful description of the widget.
*
* @return the contents string for the widget
*
* @see #toString
*/
String getNameText () {
return ""; //$NON-NLS-1$
}
/**
* Returns the receiver's style information.
* <p>
* Note that the value which is returned by this method <em>may
* not match</em> the value which was provided to the constructor
* when the receiver was created. This can occur when the underlying
* operating system does not support a particular combination of
* requested styles. For example, if the platform widget used to
* implement a particular SWT widget always has scroll bars, the
* result of calling this method would always have the
* <code>SWT.H_SCROLL</code> and <code>SWT.V_SCROLL</code> bits set.
* </p>
*
* @return the style bits
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public int getStyle () {
checkWidget();
return style;
}
/*
* Returns <code>true</code> if the specified eventType is
* hooked, and <code>false</code> otherwise. Implementations
* of SWT can avoid creating objects and sending events
* when an event happens in the operating system but
* there are no listeners hooked for the event.
*
* @param eventType the event to be checked
*
* @return <code>true</code> when the eventType is hooked and <code>false</code> otherwise
*
* @see #isListening
*/
boolean hooks (int eventType) {
if (eventTable == null) return false;
return eventTable.hooks (eventType);
}
/**
* Returns <code>true</code> if the widget has been disposed,
* and <code>false</code> otherwise.
* <p>
* This method gets the dispose state for the widget.
* When a widget has been disposed, it is an error to
* invoke any other method (except {@link #dispose()}) using the widget.
* </p>
*
* @return <code>true</code> when the widget is disposed and <code>false</code> otherwise
*/
public boolean isDisposed () {
return (state & DISPOSED) != 0;
}
/**
* Returns <code>true</code> if there are any listeners
* for the specified event type associated with the receiver,
* and <code>false</code> otherwise. The event type is one of
* the event constants defined in class <code>SWT</code>.
*
* @param eventType the type of event
* @return true if the event is hooked
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @see SWT
*/
public boolean isListening (int eventType) {
checkWidget();
return hooks (eventType);
}
/*
* Returns <code>true</code> when subclassing is
* allowed and <code>false</code> otherwise
*
* @return <code>true</code> when subclassing is allowed and <code>false</code> otherwise
*/
boolean isValidSubclass () {
return Display.isValidClass (getClass ());
}
/*
* Returns <code>true</code> when the current thread is
* the thread that created the widget and <code>false</code>
* otherwise.
*
* @return <code>true</code> when the current thread is the thread that created the widget and <code>false</code> otherwise
*/
boolean isValidThread () {
return getDisplay ().isValidThread ();
}
void mapEvent (long /*int*/ hwnd, Event event) {
}
GC new_GC (GCData data) {
return null;
}
/**
* Notifies all of the receiver's listeners for events
* of the given type that one such event has occurred by
* invoking their <code>handleEvent()</code> method. The
* event type is one of the event constants defined in class
* <code>SWT</code>.
*
* @param eventType the type of event which has occurred
* @param event the event data
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @see SWT
* @see #addListener
* @see #getListeners(int)
* @see #removeListener(int, Listener)
*/
public void notifyListeners (int eventType, Event event) {
checkWidget();
if (event == null) event = new Event ();
sendEvent (eventType, event);
}
void postEvent (int eventType) {
sendEvent (eventType, null, false);
}
void postEvent (int eventType, Event event) {
sendEvent (eventType, event, false);
}
/*
* Releases the widget hierarchy and optionally destroys
* the receiver.
* <p>
* Typically, a widget with children will broadcast this
* message to all children so that they too can release their
* resources. The <code>releaseHandle</code> method is used
* as part of this broadcast to zero the handle fields of the
* children without calling <code>destroyWidget</code>. In
* this scenario, the children are actually destroyed later,
* when the operating system destroys the widget tree.
* </p>
*
* @param destroy indicates that the receiver should be destroyed
*
* @see #dispose
* @see #releaseHandle
* @see #releaseParent
* @see #releaseWidget
*/
void release (boolean destroy) {
if ((state & DISPOSE_SENT) == 0) {
state |= DISPOSE_SENT;
sendEvent (SWT.Dispose);
}
if ((state & DISPOSED) == 0) {
releaseChildren (destroy);
}
if ((state & RELEASED) == 0) {
state |= RELEASED;
if (destroy) {
releaseParent ();
releaseWidget ();
destroyWidget ();
} else {
releaseWidget ();
releaseHandle ();
}
}
}
void releaseChildren (boolean destroy) {
}
/*
* Releases the widget's handle by zero'ing it out.
* Does not destroy or release any operating system
* resources.
* <p>
* This method is called after <code>releaseWidget</code>
* or from <code>destroyWidget</code> when a widget is being
* destroyed to ensure that the widget is marked as destroyed
* in case the act of destroying the widget in the operating
* system causes application code to run in callback that
* could access the widget.
* </p>
*
* @see #dispose
* @see #releaseChildren
* @see #releaseParent
* @see #releaseWidget
*/
void releaseHandle () {
state |= DISPOSED;
display = null;
}
/*
* Releases the receiver, a child in a widget hierarchy,
* from its parent.
* <p>
* When a widget is destroyed, it may be necessary to remove
* it from an internal data structure of the parent. When
* a widget has no handle, it may also be necessary for the
* parent to hide the widget or otherwise indicate that the
* widget has been disposed. For example, disposing a menu
* bar requires that the menu bar first be released from the
* shell when the menu bar is active.
* </p>
*
* @see #dispose
* @see #releaseChildren
* @see #releaseWidget
* @see #releaseHandle
*/
void releaseParent () {
}
/*
* Releases any internal resources back to the operating
* system and clears all fields except the widget handle.
* <p>
* When a widget is destroyed, resources that were acquired
* on behalf of the programmer need to be returned to the
* operating system. For example, if the widget made a
* copy of an icon, supplied by the programmer, this copy
* would be freed in <code>releaseWidget</code>. Also,
* to assist the garbage collector and minimize the amount
* of memory that is not reclaimed when the programmer keeps
* a reference to a disposed widget, all fields except the
* handle are zero'd. The handle is needed by <code>destroyWidget</code>.
* </p>
*
* @see #dispose
* @see #releaseChildren
* @see #releaseHandle
* @see #releaseParent
*/
void releaseWidget () {
eventTable = null;
data = null;
}
/**
* Removes the listener from the collection of listeners who will
* be notified when an event of the given type occurs. The event
* type is one of the event constants defined in class <code>SWT</code>.
*
* @param eventType the type of event to listen for
* @param listener the listener which should no longer be notified
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @see Listener
* @see SWT
* @see #addListener
* @see #getListeners(int)
* @see #notifyListeners
*/
public void removeListener (int eventType, Listener listener) {
checkWidget();
if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
_removeListener (eventType, listener);
}
/**
* Removes the listener from the collection of listeners who will
* be notified when an event of the given type occurs.
* <p>
* <b>IMPORTANT:</b> This method is <em>not</em> part of the SWT
* public API. It is marked public only so that it can be shared
* within the packages provided by SWT. It should never be
* referenced from application code.
* </p>
*
* @param eventType the type of event to listen for
* @param listener the listener which should no longer be notified
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @see Listener
* @see #addListener
*
* @noreference This method is not intended to be referenced by clients.
* @nooverride This method is not intended to be re-implemented or extended by clients.
*/
protected void removeListener (int eventType, SWTEventListener listener) {
checkWidget();
if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
if (eventTable == null) return;
eventTable.unhook (eventType, listener);
}
/**
* Removes the listener from the collection of listeners who will
* be notified when the widget is disposed.
*
* @param listener the listener which should no longer be notified
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @see DisposeListener
* @see #addDisposeListener
*/
public void removeDisposeListener (DisposeListener listener) {
checkWidget();
if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
if (eventTable == null) return;
eventTable.unhook (SWT.Dispose, listener);
}
/**
* Marks the widget to be skinned.
* <p>
* The skin event is sent to the receiver's display when appropriate (usually before the next event
* is handled). Widgets are automatically marked for skinning upon creation as well as when its skin
* id or class changes. The skin id and/or class can be changed by calling <code>Display.setData(String, Object)</code>
* with the keys SWT.SKIN_ID and/or SWT.SKIN_CLASS. Once the skin event is sent to a widget, it
* will not be sent again unless <code>reskin(int)</code> is called on the widget or on an ancestor
* while specifying the <code>SWT.ALL</code> flag.
* </p>
* <p>
* The parameter <code>flags</code> may be either:
* <dl>
* <dt><b>SWT.ALL</b></dt>
* <dd>all children in the receiver's widget tree should be skinned</dd>
* <dt><b>SWT.NONE</b></dt>
* <dd>only the receiver should be skinned</dd>
* </dl>
* </p>
* @param flags the flags specifying how to reskin
*
* @exception SWTException
* <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
* @since 3.6
*/
public void reskin (int flags) {
checkWidget ();
reskinWidget ();
if ((flags & SWT.ALL) != 0) reskinChildren (flags);
}
void reskinChildren (int flags) {
}
void reskinWidget() {
if ((state & SKIN_NEEDED) != SKIN_NEEDED) {
this.state |= SKIN_NEEDED;
display.addSkinnableWidget(this);
}
}
boolean sendDragEvent (int button, int x, int y) {
Event event = new Event ();
event.button = button;
event.x = x;
event.y = y;
setInputState (event, SWT.DragDetect);
postEvent (SWT.DragDetect, event);
if (isDisposed ()) return false;
return event.doit;
}
boolean sendDragEvent (int button, int stateMask, int x, int y) {
Event event = new Event ();
event.button = button;
event.x = x;
event.y = y;
event.stateMask = stateMask;
postEvent (SWT.DragDetect, event);
if (isDisposed ()) return false;
return event.doit;
}
void sendEvent (Event event) {
Display display = event.display;
if (!display.filterEvent (event)) {
if (eventTable != null) display.sendEvent(eventTable, event);
}
}
void sendEvent (int eventType) {
sendEvent (eventType, null, true);
}
void sendEvent (int eventType, Event event) {
sendEvent (eventType, event, true);
}
void sendEvent (int eventType, Event event, boolean send) {
if (eventTable == null && !display.filters (eventType)) {
return;
}
if (event == null) event = new Event ();
event.type = eventType;
event.display = display;
event.widget = this;
if (event.time == 0) {
event.time = display.getLastEventTime ();
}
if (send) {
sendEvent (event);
} else {
display.postEvent (event);
}
}
void sendSelectionEvent (int type) {
sendSelectionEvent (type, null, false);
}
void sendSelectionEvent (int type, Event event, boolean send) {
if (eventTable == null && !display.filters (type)) {
return;
}
if (event == null) event = new Event ();
setInputState (event, type);
sendEvent (type, event, send);
}
boolean sendKeyEvent (int type, int msg, long /*int*/ wParam, long /*int*/ lParam) {
Event event = new Event ();
if (!setKeyState (event, type, wParam, lParam)) return true;
return sendKeyEvent (type, msg, wParam, lParam, event);
}
boolean sendKeyEvent (int type, int msg, long /*int*/ wParam, long /*int*/ lParam, Event event) {
sendEvent (type, event);
if (isDisposed ()) return false;
return event.doit;
}
boolean sendMouseEvent (int type, int button, long /*int*/ hwnd, int msg, long /*int*/ wParam, long /*int*/ lParam) {
return sendMouseEvent (type, button, display.getClickCount (type, button, hwnd, lParam), 0, false, hwnd, msg, wParam, lParam);
}
boolean sendMouseEvent (int type, int button, int count, int detail, boolean send, long /*int*/ hwnd, int msg, long /*int*/ wParam, long /*int*/ lParam) {
if (!hooks (type) && !filters (type)) return true;
Event event = new Event ();
event.button = button;
event.detail = detail;
event.count = count;
event.x = OS.GET_X_LPARAM (lParam);
event.y = OS.GET_Y_LPARAM (lParam);
setInputState (event, type);
mapEvent (hwnd, event);
if (send) {
sendEvent (type, event);
if (isDisposed ()) return false;
} else {
postEvent (type, event);
}
return event.doit;
}
boolean sendMouseWheelEvent (int type, long /*int*/ hwnd, long /*int*/ wParam, long /*int*/ lParam) {
int delta = OS.GET_WHEEL_DELTA_WPARAM (wParam);
int detail = 0;
if (type == SWT.MouseWheel) {
int [] linesToScroll = new int [1];
OS.SystemParametersInfo (OS.SPI_GETWHEELSCROLLLINES, 0, linesToScroll, 0);
if (linesToScroll [0] == OS.WHEEL_PAGESCROLL) {
detail = SWT.SCROLL_PAGE;
} else {
detail = SWT.SCROLL_LINE;
delta *= linesToScroll [0];
}
/* Check if the delta and the remainder have the same direction (sign) */
if ((delta ^ display.scrollRemainder) >= 0) delta += display.scrollRemainder;
display.scrollRemainder = delta % OS.WHEEL_DELTA;
} else {
/* Check if the delta and the remainder have the same direction (sign) */
if ((delta ^ display.scrollHRemainder) >= 0) delta += display.scrollHRemainder;
display.scrollHRemainder = delta % OS.WHEEL_DELTA;
delta = -delta;
}
if (!hooks (type) && !filters (type)) return true;
int count = delta / OS.WHEEL_DELTA;
POINT pt = new POINT ();
OS.POINTSTOPOINT (pt, lParam);
OS.ScreenToClient (hwnd, pt);
lParam = OS.MAKELPARAM (pt.x, pt.y);
return sendMouseEvent (type, 0, count, detail, true, hwnd, OS.WM_MOUSEWHEEL, wParam, lParam);
}
/**
* Sets the application defined widget data associated
* with the receiver to be the argument. The <em>widget
* data</em> is a single, unnamed field that is stored
* with every widget.
* <p>
* Applications may put arbitrary objects in this field. If
* the object stored in the widget data needs to be notified
* when the widget is disposed of, it is the application's
* responsibility to hook the Dispose event on the widget and
* do so.
* </p>
*
* @param data the widget data
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - when the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - when called from the wrong thread</li>
* </ul>
*
* @see #getData()
*/
public void setData (Object data) {
checkWidget();
if ((state & KEYED_DATA) != 0) {
((Object []) this.data) [0] = data;
} else {
this.data = data;
}
}
/**
* Sets the application defined property of the receiver
* with the specified name to the given value.
* <p>
* Applications may associate arbitrary objects with the
* receiver in this fashion. If the objects stored in the
* properties need to be notified when the widget is disposed
* of, it is the application's responsibility to hook the
* Dispose event on the widget and do so.
* </p>
*
* @param key the name of the property
* @param value the new value for the property
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the key is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @see #getData(String)
*/
public void setData (String key, Object value) {
checkWidget();
if (key == null) error (SWT.ERROR_NULL_ARGUMENT);
int index = 1;
Object [] table = null;
if ((state & KEYED_DATA) != 0) {
table = (Object []) data;
while (index < table.length) {
if (key.equals (table [index])) break;
index += 2;
}
}
if (value != null) {
if ((state & KEYED_DATA) != 0) {
if (index == table.length) {
Object [] newTable = new Object [table.length + 2];
System.arraycopy (table, 0, newTable, 0, table.length);
data = table = newTable;
}
} else {
table = new Object [3];
table [0] = data;
data = table;
state |= KEYED_DATA;
}
table [index] = key;
table [index + 1] = value;
} else {
if ((state & KEYED_DATA) != 0) {
if (index != table.length) {
int length = table.length - 2;
if (length == 1) {
data = table [0];
state &= ~KEYED_DATA;
} else {
Object [] newTable = new Object [length];
System.arraycopy (table, 0, newTable, 0, index);
System.arraycopy (table, index + 2, newTable, index, length - index);
data = newTable;
}
}
}
}
if (key.equals(SWT.SKIN_CLASS) || key.equals(SWT.SKIN_ID)) this.reskin(SWT.ALL);
}
boolean sendFocusEvent (int type) {
sendEvent (type);
// widget could be disposed at this point
return true;
}
boolean setInputState (Event event, int type) {
if (OS.GetKeyState (OS.VK_MENU) < 0) event.stateMask |= SWT.ALT;
if (OS.GetKeyState (OS.VK_SHIFT) < 0) event.stateMask |= SWT.SHIFT;
if (OS.GetKeyState (OS.VK_CONTROL) < 0) event.stateMask |= SWT.CONTROL;
if (OS.GetKeyState (OS.VK_LBUTTON) < 0) event.stateMask |= SWT.BUTTON1;
if (OS.GetKeyState (OS.VK_MBUTTON) < 0) event.stateMask |= SWT.BUTTON2;
if (OS.GetKeyState (OS.VK_RBUTTON) < 0) event.stateMask |= SWT.BUTTON3;
/*
* Bug in Windows. On some machines that do not have XBUTTONs,
* the MK_XBUTTON1 and OS.MK_XBUTTON2 bits are sometimes set,
* causing mouse capture to become stuck. The fix is to test
* for the extra buttons only when they exist.
*/
if (display.xMouse) {
if (OS.GetKeyState (OS.VK_XBUTTON1) < 0) event.stateMask |= SWT.BUTTON4;
if (OS.GetKeyState (OS.VK_XBUTTON2) < 0) event.stateMask |= SWT.BUTTON5;
}
switch (type) {
case SWT.MouseDown:
case SWT.MouseDoubleClick:
if (event.button == 1) event.stateMask &= ~SWT.BUTTON1;
if (event.button == 2) event.stateMask &= ~SWT.BUTTON2;
if (event.button == 3) event.stateMask &= ~SWT.BUTTON3;
if (event.button == 4) event.stateMask &= ~SWT.BUTTON4;
if (event.button == 5) event.stateMask &= ~SWT.BUTTON5;
break;
case SWT.MouseUp:
if (event.button == 1) event.stateMask |= SWT.BUTTON1;
if (event.button == 2) event.stateMask |= SWT.BUTTON2;
if (event.button == 3) event.stateMask |= SWT.BUTTON3;
if (event.button == 4) event.stateMask |= SWT.BUTTON4;
if (event.button == 5) event.stateMask |= SWT.BUTTON5;
break;
case SWT.KeyDown:
case SWT.Traverse:
if (event.keyCode == SWT.ALT) event.stateMask &= ~SWT.ALT;
if (event.keyCode == SWT.SHIFT) event.stateMask &= ~SWT.SHIFT;
if (event.keyCode == SWT.CONTROL) event.stateMask &= ~SWT.CONTROL;
break;
case SWT.KeyUp:
if (event.keyCode == SWT.ALT) event.stateMask |= SWT.ALT;
if (event.keyCode == SWT.SHIFT) event.stateMask |= SWT.SHIFT;
if (event.keyCode == SWT.CONTROL) event.stateMask |= SWT.CONTROL;
break;
}
return true;
}
boolean setKeyState (Event event, int type, long /*int*/ wParam, long /*int*/ lParam) {
/*
* Feature in Windows. When the user presses Ctrl+Backspace
* or Ctrl+Enter, Windows sends a WM_CHAR with Delete (0x7F)
* and '\n' instead of '\b' and '\r'. This is the correct
* platform behavior but is not portable. The fix is to detect
* these cases and convert the character.
*/
switch (display.lastAscii) {
case SWT.DEL:
if (display.lastKey == SWT.BS) display.lastAscii = SWT.BS;
break;
case SWT.LF:
if (display.lastKey == SWT.CR) display.lastAscii = SWT.CR;
break;
}
/*
* Feature in Windows. When the user presses either the Enter
* key or the numeric keypad Enter key, Windows sends a WM_KEYDOWN
* with wParam=VK_RETURN in both cases. In order to distinguish
* between the keys, the extended key bit is tested. If the bit
* is set, assume that the numeric keypad Enter was pressed.
*/
if (display.lastKey == SWT.CR && display.lastAscii == SWT.CR) {
if ((lParam & 0x1000000) != 0) display.lastKey = SWT.KEYPAD_CR;
}
setLocationMask(event, type, wParam, lParam);
if (display.lastVirtual) {
/*
* Feature in Windows. The virtual key VK_DELETE is not
* treated as both a virtual key and an ASCII key by Windows.
* Therefore, we will not receive a WM_CHAR for this key.
* The fix is to treat VK_DELETE as a special case and map
* the ASCII value explicitly (Delete is 0x7F).
*/
if (display.lastKey == OS.VK_DELETE) display.lastAscii = 0x7F;
/*
* Feature in Windows. When the user presses Ctrl+Pause, the
* VK_CANCEL key is generated and a WM_CHAR is sent with 0x03,
* possibly to allow an application to look for Ctrl+C and the
* the Break key at the same time. This is unexpected and
* unwanted. The fix is to detect the case and set the character
* to zero.
*/
if (display.lastKey == OS.VK_CANCEL) display.lastAscii = 0x0;
event.keyCode = Display.translateKey (display.lastKey);
} else {
event.keyCode = display.lastKey;
}
if (display.lastAscii != 0 || display.lastNull) {
event.character = Display.mbcsToWcs ((char) display.lastAscii);
}
if (event.keyCode == 0 && event.character == 0) {
if (!display.lastNull) return false;
}
return setInputState (event, type);
}
int setLocationMask (Event event, int type, long /*int*/ wParam, long /*int*/ lParam) {
int location = SWT.NONE;
if (display.lastVirtual) {
switch (display.lastKey) {
case OS.VK_SHIFT:
if (OS.GetKeyState(OS.VK_LSHIFT) < 0) location = SWT.LEFT;
if (OS.GetKeyState(OS.VK_RSHIFT) < 0) location = SWT.RIGHT;
break;
case OS.VK_NUMLOCK:
location = SWT.KEYPAD;
break;
case OS.VK_CONTROL:
case OS.VK_MENU:
location = (lParam & 0x1000000) == 0 ? SWT.LEFT : SWT.RIGHT;
break;
case OS.VK_INSERT:
case OS.VK_DELETE:
case OS.VK_HOME:
case OS.VK_END:
case OS.VK_PRIOR:
case OS.VK_NEXT:
case OS.VK_UP:
case OS.VK_DOWN:
case OS.VK_LEFT:
case OS.VK_RIGHT:
if ((lParam & 0x1000000) == 0) {
location = SWT.KEYPAD;
}
break;
}
if (display.numpadKey(display.lastKey) != 0) {
location = SWT.KEYPAD;
}
} else {
if (display.lastKey == SWT.KEYPAD_CR) {
location = SWT.KEYPAD;
}
}
event.keyLocation = location;
return location;
}
boolean setTabGroupFocus () {
return setTabItemFocus ();
}
boolean setTabItemFocus () {
return false;
}
boolean SetWindowPos (long /*int*/ hWnd, long /*int*/ hWndInsertAfter, int X, int Y, int cx, int cy, int uFlags) {
if (OS.IsWinCE) {
/*
* Feature in Windows. On Windows CE, SetWindowPos() always causes
* a WM_SIZE message, even when the new size is the same as the old
* size. The fix is to detect that the size has not changed and set
* SWP_NOSIZE.
*/
if ((uFlags & OS.SWP_NOSIZE) == 0) {
RECT lpRect = new RECT ();
OS.GetWindowRect (hWnd, lpRect);
if (cy == lpRect.bottom - lpRect.top && cx == lpRect.right - lpRect.left) {
/*
* Feature in Windows. On Windows CE, SetWindowPos() when called
* with SWP_DRAWFRAME always causes a WM_SIZE message, even
* when SWP_NOSIZE is set and when the new size is the same as the
* old size. The fix is to clear SWP_DRAWFRAME when the size is
* the same.
*/
uFlags &= ~OS.SWP_DRAWFRAME;
uFlags |= OS.SWP_NOSIZE;
}
}
}
return OS.SetWindowPos (hWnd, hWndInsertAfter, X, Y, cx, cy, uFlags);
}
boolean showMenu (int x, int y) {
return showMenu (x, y, SWT.MENU_MOUSE);
}
boolean showMenu (int x, int y, int detail) {
Event event = new Event ();
event.x = x;
event.y = y;
event.detail = detail;
if (event.detail == SWT.MENU_KEYBOARD) {
updateMenuLocation (event);
}
sendEvent (SWT.MenuDetect, event);
// widget could be disposed at this point
if (isDisposed ()) return false;
if (!event.doit) return true;
Menu menu = getMenu ();
if (menu != null && !menu.isDisposed ()) {
if (x != event.x || y != event.y) {
menu.setLocation (event.x, event.y);
}
menu.setVisible (true);
return true;
}
return false;
}
/**
* Returns a string containing a concise, human-readable
* description of the receiver.
*
* @return a string representation of the receiver
*/
public String toString () {
String string = "*Disposed*"; //$NON-NLS-1$
if (!isDisposed ()) {
string = "*Wrong Thread*"; //$NON-NLS-1$
if (isValidThread ()) string = getNameText ();
}
return getName () + " {" + string + "}"; //$NON-NLS-1$ //$NON-NLS-2$
}
void updateMenuLocation (Event event) {
/* Do nothing */
}
LRESULT wmCaptureChanged (long /*int*/ hwnd, long /*int*/ wParam, long /*int*/ lParam) {
display.captureChanged = true;
return null;
}
LRESULT wmChar (long /*int*/ hwnd, long /*int*/ wParam, long /*int*/ lParam) {
/*
* Do not report a lead byte as a key pressed.
*/
if (!OS.IsUnicode && OS.IsDBLocale) {
byte lead = (byte) (wParam & 0xFF);
if (OS.IsDBCSLeadByte (lead)) return null;
}
display.lastAscii = (int)/*64*/wParam;
display.lastNull = wParam == 0;
if (!sendKeyEvent (SWT.KeyDown, OS.WM_CHAR, wParam, lParam)) {
return LRESULT.ONE;
}
// widget could be disposed at this point
return null;
}
LRESULT wmContextMenu (long /*int*/ hwnd, long /*int*/ wParam, long /*int*/ lParam) {
if (wParam != hwnd) return null;
/*
* Feature in Windows. SHRecognizeGesture() sends an undocumented
* WM_CONTEXTMENU notification when the flag SHRG_NOTIFY_PARENT is
* not set. This causes the context menu to be displayed twice,
* once by the caller of SHRecognizeGesture() and once from this
* method. The fix is to ignore WM_CONTEXTMENU notifications on
* all WinCE platforms.
*
* NOTE: This only happens on WM2003. Previous WinCE versions did
* not support WM_CONTEXTMENU.
*/
if (OS.IsWinCE) return null;
/*
* Feature in Windows. When the user presses WM_NCRBUTTONUP,
* a WM_CONTEXTMENU message is generated. This happens when
* the user releases the mouse over a scroll bar. Normally,
* window displays the default scrolling menu but applications
* can process WM_CONTEXTMENU to display a different menu.
* Typically, an application does not want to supply a special
* scroll menu. The fix is to look for a WM_CONTEXTMENU that
* originated from a mouse event and display the menu when the
* mouse was released in the client area.
*/
int x = 0, y = 0, detail = 0;
if (lParam != -1) {
POINT pt = new POINT ();
OS.POINTSTOPOINT (pt, lParam);
x = pt.x;
y = pt.y;
detail = SWT.MENU_MOUSE;
OS.ScreenToClient (hwnd, pt);
RECT rect = new RECT ();
OS.GetClientRect (hwnd, rect);
if (!OS.PtInRect (rect, pt)) return null;
} else {
int pos = OS.GetMessagePos ();
x = OS.GET_X_LPARAM (pos);
y = OS.GET_Y_LPARAM (pos);
detail = SWT.MENU_KEYBOARD;
}
/* Show the menu */
return showMenu (x, y, detail) ? LRESULT.ZERO : null;
}
LRESULT wmIMEChar (long /*int*/ hwnd, long /*int*/ wParam, long /*int*/ lParam) {
Display display = this.display;
display.lastKey = 0;
display.lastAscii = (int)/*64*/wParam;
display.lastVirtual = display.lastNull = display.lastDead = false;
if (!sendKeyEvent (SWT.KeyDown, OS.WM_IME_CHAR, wParam, lParam)) {
return LRESULT.ONE;
}
sendKeyEvent (SWT.KeyUp, OS.WM_IME_CHAR, wParam, lParam);
// widget could be disposed at this point
display.lastKey = display.lastAscii = 0;
return LRESULT.ONE;
}
LRESULT wmKeyDown (long /*int*/ hwnd, long /*int*/ wParam, long /*int*/ lParam) {
/* Ignore repeating modifier keys by testing key down state */
switch ((int)/*64*/wParam) {
case OS.VK_SHIFT:
case OS.VK_MENU:
case OS.VK_CONTROL:
case OS.VK_CAPITAL:
case OS.VK_NUMLOCK:
case OS.VK_SCROLL:
if ((lParam & 0x40000000) != 0) return null;
}
/* Clear last key and last ascii because a new key has been typed */
display.lastAscii = display.lastKey = 0;
display.lastVirtual = display.lastNull = display.lastDead = false;
/*
* Do not report a lead byte as a key pressed.
*/
if (!OS.IsUnicode && OS.IsDBLocale) {
byte lead = (byte) (wParam & 0xFF);
if (OS.IsDBCSLeadByte (lead)) return null;
}
/* Map the virtual key */
/*
* Bug in WinCE. MapVirtualKey() returns incorrect values.
* The fix is to rely on a key mappings table to determine
* whether the key event must be sent now or if a WM_CHAR
* event will follow. The key mappings table maps virtual
* keys to SWT key codes and does not contain mappings for
* Windows virtual keys like VK_A. Virtual keys that are
* both virtual and ASCII are a special case.
*/
int mapKey = 0;
if (OS.IsWinCE) {
switch ((int)/*64*/wParam) {
case OS.VK_BACK: mapKey = SWT.BS; break;
case OS.VK_RETURN: mapKey = SWT.CR; break;
case OS.VK_DELETE: mapKey = SWT.DEL; break;
case OS.VK_ESCAPE: mapKey = SWT.ESC; break;
case OS.VK_TAB: mapKey = SWT.TAB; break;
}
} else {
mapKey = OS.MapVirtualKey ((int)/*64*/wParam, 2);
/*
* Feature in Windows. For Devanagari and Bengali numbers,
* MapVirtualKey() returns the localized number instead of
* the ASCII equivalent. For example, MapVirtualKey()
* maps VK_1 on the numbers keyboard to \u0967, which is
* the Devanagari digit '1', but not ASCII.
* The fix is to test for Devanagari and Bengali digits and
* map these explicitly.
*
* NOTE: VK_0 to VK_9 are the same as ASCII.
*/
if (('\u09e6' <= mapKey && mapKey <= '\u09ef') || ('\u0966' <= mapKey && mapKey <= '\u096f')) {
mapKey = (int)/*64*/wParam;
}
}
/*
* Bug in Windows 95 and NT. When the user types an accent key such
* as ^ to get an accented character on a German keyboard, the accent
* key should be ignored and the next key that the user types is the
* accented key. The fix is to detect the accent key stroke (called
* a dead key) by testing the high bit of the value returned by
* MapVirtualKey(). A further problem is that the high bit on
* Windows NT is bit 32 while the high bit on Windows 95 is bit 16.
* They should both be bit 32.
*
* When the user types an accent key that does not correspond to a
* virtual key, MapVirtualKey() won't set the high bit to indicate
* a dead key. This happens when an accent key, such as '^' is the
* result of a modifier such as Shift key and MapVirtualKey() always
* returns the unshifted key. The fix is to peek for a WM_DEADCHAR
* and avoid issuing the event.
*/
if (OS.IsWinNT) {
if ((mapKey & 0x80000000) != 0) return null;
} else {
if ((mapKey & 0x8000) != 0) return null;
}
MSG msg = new MSG ();
int flags = OS.PM_NOREMOVE | OS.PM_NOYIELD | OS.PM_QS_INPUT | OS.PM_QS_POSTMESSAGE;
if (OS.PeekMessage (msg, hwnd, OS.WM_DEADCHAR, OS.WM_DEADCHAR, flags)) {
display.lastDead = true;
display.lastVirtual = mapKey == 0;
display.lastKey = display.lastVirtual ? (int)/*64*/wParam : mapKey;
return null;
}
/*
* Bug in Windows. Somehow, the widget is becoming disposed after
* calling PeekMessage(). In rare circumstances, it seems that
* PeekMessage() can allow SWT listeners to run that might contain
* application code that disposes the widget. It is not exactly
* clear how this can happen. PeekMessage() is only looking for
* WM_DEADCHAR. It is not dispatching any message that it finds
* or removing any message from the queue. Cross-thread messages
* are disabled. The fix is to check for a disposed widget and
* return without calling the window proc.
*/
if (isDisposed ()) return LRESULT.ONE;
/*
* If we are going to get a WM_CHAR, ensure that last key has
* the correct character value for the key down and key up
* events. It is not sufficient to ignore the WM_KEYDOWN
* (when we know we are going to get a WM_CHAR) and compute
* the key in WM_CHAR because there is not enough information
* by the time we get the WM_CHAR. For example, when the user
* types Ctrl+Shift+6 on a US keyboard, we get a WM_CHAR with
* wParam=30. When the user types Ctrl+Shift+6 on a German
* keyboard, we also get a WM_CHAR with wParam=30. On the US
* keyboard Shift+6 is ^, on the German keyboard Shift+6 is &.
* There is no way to map wParam=30 in WM_CHAR to the correct
* value. Also, on international keyboards, the control key
* may be down when the user has not entered a control character.
*
* NOTE: On Windows 98, keypad keys are virtual despite the
* fact that a WM_CHAR is issued. On Windows 2000 and XP,
* they are not virtual. Therefore it is necessary to force
* numeric keypad keys to be virtual.
*/
display.lastVirtual = mapKey == 0 || display.numpadKey ((int)/*64*/wParam) != 0;
if (display.lastVirtual) {
display.lastKey = (int)/*64*/wParam;
/*
* Feature in Windows. The virtual key VK_DELETE is not
* treated as both a virtual key and an ASCII key by Windows.
* Therefore, we will not receive a WM_CHAR for this key.
* The fix is to treat VK_DELETE as a special case and map
* the ASCII value explicitly (Delete is 0x7F).
*/
if (display.lastKey == OS.VK_DELETE) display.lastAscii = 0x7F;
/*
* It is possible to get a WM_CHAR for a virtual key when
* Num Lock is on. If the user types Home while Num Lock
* is down, a WM_CHAR is issued with WPARM=55 (for the
* character 7). If we are going to get a WM_CHAR we need
* to ensure that the last key has the correct value. Note
* that Ctrl+Home does not issue a WM_CHAR when Num Lock is
* down.
*/
if (OS.VK_NUMPAD0 <= display.lastKey && display.lastKey <= OS.VK_DIVIDE) {
/*
* Feature in Windows. Calling to ToAscii() or ToUnicode(), clears
* the accented state such that the next WM_CHAR loses the accent.
* This makes is critical that the accent key is detected. Also,
* these functions clear the character that is entered using the
* special Windows keypad sequence when NumLock is down (ie. typing
* ALT+0231 should gives 'c' with a cedilla when NumLock is down).
*/
if (display.asciiKey (display.lastKey) != 0) return null;
display.lastAscii = display.numpadKey (display.lastKey);
}
} else {
/*
* Convert LastKey to lower case because Windows non-virtual
* keys that are also ASCII keys, such as like VK_A, are have
* upper case values in WM_KEYDOWN despite the fact that the
* Shift was not pressed.
*/
display.lastKey = (int)/*64*/OS.CharLower ((short) mapKey);
/*
* Feature in Windows. The virtual key VK_CANCEL is treated
* as both a virtual key and ASCII key by Windows. This
* means that a WM_CHAR with WPARAM=3 will be issued for
* this key. In order to distinguish between this key and
* Ctrl+C, mark the key as virtual.
*/
if (wParam == OS.VK_CANCEL) display.lastVirtual = true;
/*
* Some key combinations map to Windows ASCII keys depending
* on the keyboard. For example, Ctrl+Alt+Q maps to @ on a
* German keyboard. If the current key combination is special,
* the correct character is placed in wParam for processing in
* WM_CHAR. If this is the case, issue the key down event from
* inside WM_CHAR.
*/
int asciiKey = display.asciiKey ((int)/*64*/wParam);
if (asciiKey != 0) {
/*
* When the user types Ctrl+Space, ToAscii () maps this to
* Space. Normally, ToAscii () maps a key to a different
* key if both a WM_KEYDOWN and a WM_CHAR will be issued.
* To avoid the extra SWT.KeyDown, look for a space and
* issue the event from WM_CHAR.
*/
if (asciiKey == ' ') return null;
if (asciiKey != (int)/*64*/wParam) return null;
/*
* Feature in Windows. The virtual key VK_CANCEL is treated
* as both a virtual key and ASCII key by Windows. This
* means that a WM_CHAR with WPARAM=3 will be issued for
* this key. To avoid the extra SWT.KeyDown, look for
* VK_CANCEL and issue the event from WM_CHAR.
*/
if (wParam == OS.VK_CANCEL) return null;
}
/*
* If the control key is not down at this point, then
* the key that was pressed was an accent key or a regular
* key such as 'A' or Shift+A. In that case, issue the
* key event from WM_CHAR.
*/
if (OS.GetKeyState (OS.VK_CONTROL) >= 0) return null;
/*
* Get the shifted state or convert to lower case if necessary.
* If the user types Ctrl+A, LastAscii should be 'a', not 'A'.
* If the user types Ctrl+Shift+A, LastAscii should be 'A'.
* If the user types Ctrl+Shift+6, the value of LastAscii will
* depend on the international keyboard.
*/
if (OS.GetKeyState (OS.VK_SHIFT) < 0) {
display.lastAscii = display.shiftedKey ((int)/*64*/wParam);
if (display.lastAscii == 0) display.lastAscii = mapKey;
} else {
display.lastAscii = (int)/*64*/OS.CharLower ((short) mapKey);
}
/* Note that Ctrl+'@' is ASCII NUL and is delivered in WM_CHAR */
if (display.lastAscii == '@') return null;
display.lastAscii = display.controlKey (display.lastAscii);
}
if (!sendKeyEvent (SWT.KeyDown, OS.WM_KEYDOWN, wParam, lParam)) {
return LRESULT.ONE;
}
// widget could be disposed at this point
return null;
}
LRESULT wmKeyUp (long /*int*/ hwnd, long /*int*/ wParam, long /*int*/ lParam) {
Display display = this.display;
/* Check for hardware keys */
if (OS.IsWinCE) {
if (OS.VK_APP1 <= wParam && wParam <= OS.VK_APP6) {
display.lastKey = display.lastAscii = 0;
display.lastVirtual = display.lastNull = display.lastDead = false;
Event event = new Event ();
event.detail = (int)/*64*/wParam - OS.VK_APP1 + 1;
/* Check the bit 30 to get the key state */
int type = (lParam & 0x40000000) != 0 ? SWT.HardKeyUp : SWT.HardKeyDown;
if (setInputState (event, type)) sendEvent (type, event);
// widget could be disposed at this point
return null;
}
}
/*
* If the key up is not hooked, reset last key
* and last ascii in case the key down is hooked.
*/
if (!hooks (SWT.KeyUp) && !display.filters (SWT.KeyUp)) {
display.lastKey = display.lastAscii = 0;
display.lastVirtual = display.lastNull = display.lastDead = false;
return null;
}
/* Map the virtual key. */
/*
* Bug in WinCE. MapVirtualKey() returns incorrect values.
* The fix is to rely on a key mappings table to determine
* whether the key event must be sent now or if a WM_CHAR
* event will follow. The key mappings table maps virtual
* keys to SWT key codes and does not contain mappings for
* Windows virtual keys like VK_A. Virtual keys that are
* both virtual and ASCII are a special case.
*/
int mapKey = 0;
if (OS.IsWinCE) {
switch ((int)/*64*/wParam) {
case OS.VK_BACK: mapKey = SWT.BS; break;
case OS.VK_RETURN: mapKey = SWT.CR; break;
case OS.VK_DELETE: mapKey = SWT.DEL; break;
case OS.VK_ESCAPE: mapKey = SWT.ESC; break;
case OS.VK_TAB: mapKey = SWT.TAB; break;
}
} else {
mapKey = OS.MapVirtualKey ((int)/*64*/wParam, 2);
}
/*
* Bug in Windows 95 and NT. When the user types an accent key such
* as ^ to get an accented character on a German keyboard, the accent
* key should be ignored and the next key that the user types is the
* accented key. The fix is to detect the accent key stroke (called
* a dead key) by testing the high bit of the value returned by
* MapVirtualKey (). A further problem is that the high bit on
* Windows NT is bit 32 while the high bit on Windows 95 is bit 16.
* They should both be bit 32.
*/
if (OS.IsWinNT) {
if ((mapKey & 0x80000000) != 0) return null;
} else {
if ((mapKey & 0x8000) != 0) return null;
}
if (display.lastDead) return null;
/*
* NOTE: On Windows 98, keypad keys are virtual despite the
* fact that a WM_CHAR is issued. On Windows 2000 and XP,
* they are not virtual. Therefore it is necessary to force
* numeric keypad keys to be virtual.
*/
display.lastVirtual = mapKey == 0 || display.numpadKey ((int)/*64*/wParam) != 0;
if (display.lastVirtual) {
display.lastKey = (int)/*64*/wParam;
} else {
/*
* Feature in Windows. The virtual key VK_CANCEL is treated
* as both a virtual key and ASCII key by Windows. This
* means that a WM_CHAR with WPARAM=3 will be issued for
* this key. In order to distinguish between this key and
* Ctrl+C, mark the key as virtual.
*/
if (wParam == OS.VK_CANCEL) display.lastVirtual = true;
if (display.lastKey == 0) {
display.lastAscii = 0;
display.lastNull = display.lastDead = false;
return null;
}
}
LRESULT result = null;
if (!sendKeyEvent (SWT.KeyUp, OS.WM_KEYUP, wParam, lParam)) {
result = LRESULT.ONE;
}
// widget could be disposed at this point
display.lastKey = display.lastAscii = 0;
display.lastVirtual = display.lastNull = display.lastDead = false;
return result;
}
LRESULT wmKillFocus (long /*int*/ hwnd, long /*int*/ wParam, long /*int*/ lParam) {
display.scrollRemainder = display.scrollHRemainder = 0;
long /*int*/ code = callWindowProc (hwnd, OS.WM_KILLFOCUS, wParam, lParam);
sendFocusEvent (SWT.FocusOut);
// widget could be disposed at this point
/*
* It is possible (but unlikely), that application
* code could have disposed the widget in the focus
* or deactivate events. If this happens, end the
* processing of the Windows message by returning
* zero as the result of the window proc.
*/
if (isDisposed ()) return LRESULT.ZERO;
if (code == 0) return LRESULT.ZERO;
return new LRESULT (code);
}
LRESULT wmLButtonDblClk (long /*int*/ hwnd, long /*int*/ wParam, long /*int*/ lParam) {
/*
* Feature in Windows. Windows sends the following
* messages when the user double clicks the mouse:
*
* WM_LBUTTONDOWN - mouse down
* WM_LBUTTONUP - mouse up
* WM_LBUTTONDBLCLK - double click
* WM_LBUTTONUP - mouse up
*
* Applications that expect matching mouse down/up
* pairs will not see the second mouse down. The
* fix is to send a mouse down event.
*/
LRESULT result = null;
Display display = this.display;
display.captureChanged = false;
sendMouseEvent (SWT.MouseDown, 1, hwnd, OS.WM_LBUTTONDOWN, wParam, lParam);
if (sendMouseEvent (SWT.MouseDoubleClick, 1, hwnd, OS.WM_LBUTTONDBLCLK, wParam, lParam)) {
result = new LRESULT (callWindowProc (hwnd, OS.WM_LBUTTONDBLCLK, wParam, lParam));
} else {
result = LRESULT.ZERO;
}
if (!display.captureChanged && !isDisposed ()) {
if (OS.GetCapture () != hwnd) OS.SetCapture (hwnd);
}
return result;
}
LRESULT wmLButtonDown (long /*int*/ hwnd, long /*int*/ wParam, long /*int*/ lParam) {
Display display = this.display;
LRESULT result = null;
int x = OS.GET_X_LPARAM (lParam);
int y = OS.GET_Y_LPARAM (lParam);
boolean [] consume = null, detect = null;
boolean dragging = false, mouseDown = true;
int count = display.getClickCount (SWT.MouseDown, 1, hwnd, lParam);
if (count == 1 && (state & DRAG_DETECT) != 0 && hooks (SWT.DragDetect)) {
if (!OS.IsWinCE) {
/*
* Feature in Windows. It's possible that the drag
* operation will not be started while the mouse is
* down, meaning that the mouse should be captured.
* This can happen when the user types the ESC key
* to cancel the drag. The fix is to query the state
* of the mouse and capture the mouse accordingly.
*/
detect = new boolean [1];
consume = new boolean [1];
dragging = dragDetect (hwnd, x, y, true, detect, consume);
if (isDisposed ()) return LRESULT.ZERO;
mouseDown = OS.GetKeyState (OS.VK_LBUTTON) < 0;
}
}
display.captureChanged = false;
boolean dispatch = sendMouseEvent (SWT.MouseDown, 1, count, 0, false, hwnd, OS.WM_LBUTTONDOWN, wParam, lParam);
if (dispatch && (consume == null || !consume [0])) {
result = new LRESULT (callWindowProc (hwnd, OS.WM_LBUTTONDOWN, wParam, lParam));
} else {
result = LRESULT.ZERO;
}
if (OS.IsPPC) {
/*
* Note: On WinCE PPC, only attempt to recognize the gesture for
* a context menu when the control contains a valid menu or there
* are listeners for the MenuDetect event.
*/
Menu menu = getMenu ();
boolean hasMenu = menu != null && !menu.isDisposed ();
if (hasMenu || hooks (SWT.MenuDetect)) {
SHRGINFO shrg = new SHRGINFO ();
shrg.cbSize = SHRGINFO.sizeof;
shrg.hwndClient = hwnd;
shrg.ptDown_x = x;
shrg.ptDown_y = y;
shrg.dwFlags = OS.SHRG_RETURNCMD;
int type = OS.SHRecognizeGesture (shrg);
if (type == OS.GN_CONTEXTMENU) showMenu (x, y);
}
}
if (mouseDown) {
if (!display.captureChanged && !isDisposed ()) {
if (OS.GetCapture () != hwnd) OS.SetCapture (hwnd);
}
}
if (dragging) {
sendDragEvent (1, x, y);
} else {
if (detect != null && detect [0]) {
/*
* Feature in Windows. DragDetect() captures the mouse
* and tracks its movement until the user releases the
* left mouse button, presses the ESC key, or moves the
* mouse outside the drag rectangle. If the user moves
* the mouse outside of the drag rectangle, DragDetect()
* returns true and a drag and drop operation can be
* started. When the left mouse button is released or
* the ESC key is pressed, these events are consumed by
* DragDetect() so that application code that matches
* mouse down/up pairs or looks for the ESC key will not
* function properly. The fix is to send the missing
* events when the drag has not started.
*
* NOTE: For now, don't send a fake WM_KEYDOWN/WM_KEYUP
* events for the ESC key. This would require computing
* wParam (the key) and lParam (the repeat count, scan code,
* extended-key flag, context code, previous key-state flag,
* and transition-state flag) which is non-trivial.
*/
if (OS.GetKeyState (OS.VK_ESCAPE) >= 0) {
OS.SendMessage (hwnd, OS.WM_LBUTTONUP, wParam, lParam);
}
}
}
return result;
}
LRESULT wmLButtonUp (long /*int*/ hwnd, long /*int*/ wParam, long /*int*/ lParam) {
Display display = this.display;
LRESULT result = null;
if (sendMouseEvent (SWT.MouseUp, 1, hwnd, OS.WM_LBUTTONUP, wParam, lParam)) {
result = new LRESULT (callWindowProc (hwnd, OS.WM_LBUTTONUP, wParam, lParam));
} else {
result = LRESULT.ZERO;
}
/*
* Bug in Windows. On some machines that do not have XBUTTONs,
* the MK_XBUTTON1 and OS.MK_XBUTTON2 bits are sometimes set,
* causing mouse capture to become stuck. The fix is to test
* for the extra buttons only when they exist.
*/
int mask = OS.MK_LBUTTON | OS.MK_MBUTTON | OS.MK_RBUTTON;
if (display.xMouse) mask |= OS.MK_XBUTTON1 | OS.MK_XBUTTON2;
if ((wParam & mask) == 0) {
if (OS.GetCapture () == hwnd) OS.ReleaseCapture ();
}
return result;
}
LRESULT wmMButtonDblClk (long /*int*/ hwnd, long /*int*/ wParam, long /*int*/ lParam) {
/*
* Feature in Windows. Windows sends the following
* messages when the user double clicks the mouse:
*
* WM_MBUTTONDOWN - mouse down
* WM_MBUTTONUP - mouse up
* WM_MLBUTTONDBLCLK - double click
* WM_MBUTTONUP - mouse up
*
* Applications that expect matching mouse down/up
* pairs will not see the second mouse down. The
* fix is to send a mouse down event.
*/
LRESULT result = null;
Display display = this.display;
display.captureChanged = false;
sendMouseEvent (SWT.MouseDown, 2, hwnd, OS.WM_MBUTTONDOWN, wParam, lParam);
if (sendMouseEvent (SWT.MouseDoubleClick, 2, hwnd, OS.WM_MBUTTONDBLCLK, wParam, lParam)) {
result = new LRESULT (callWindowProc (hwnd, OS.WM_MBUTTONDBLCLK, wParam, lParam));
} else {
result = LRESULT.ZERO;
}
if (!display.captureChanged && !isDisposed ()) {
if (OS.GetCapture () != hwnd) OS.SetCapture (hwnd);
}
return result;
}
LRESULT wmMButtonDown (long /*int*/ hwnd, long /*int*/ wParam, long /*int*/ lParam) {
LRESULT result = null;
Display display = this.display;
display.captureChanged = false;
if (sendMouseEvent (SWT.MouseDown, 2, hwnd, OS.WM_MBUTTONDOWN, wParam, lParam)) {
result = new LRESULT (callWindowProc (hwnd, OS.WM_MBUTTONDOWN, wParam, lParam));
} else {
result = LRESULT.ZERO;
}
if (!display.captureChanged && !isDisposed ()) {
if (OS.GetCapture () != hwnd) OS.SetCapture (hwnd);
}
return result;
}
LRESULT wmMButtonUp (long /*int*/ hwnd, long /*int*/ wParam, long /*int*/ lParam) {
Display display = this.display;
LRESULT result = null;
if (sendMouseEvent (SWT.MouseUp, 2, hwnd, OS.WM_MBUTTONUP, wParam, lParam)) {
result = new LRESULT (callWindowProc (hwnd, OS.WM_MBUTTONUP, wParam, lParam));
} else {
result = LRESULT.ZERO;
}
/*
* Bug in Windows. On some machines that do not have XBUTTONs,
* the MK_XBUTTON1 and OS.MK_XBUTTON2 bits are sometimes set,
* causing mouse capture to become stuck. The fix is to test
* for the extra buttons only when they exist.
*/
int mask = OS.MK_LBUTTON | OS.MK_MBUTTON | OS.MK_RBUTTON;
if (display.xMouse) mask |= OS.MK_XBUTTON1 | OS.MK_XBUTTON2;
if ((wParam & mask) == 0) {
if (OS.GetCapture () == hwnd) OS.ReleaseCapture ();
}
return result;
}
LRESULT wmMouseHover (long /*int*/ hwnd, long /*int*/ wParam, long /*int*/ lParam) {
if (!sendMouseEvent (SWT.MouseHover, 0, hwnd, OS.WM_MOUSEHOVER, wParam, lParam)) {
return LRESULT.ZERO;
}
return null;
}
LRESULT wmMouseLeave (long /*int*/ hwnd, long /*int*/ wParam, long /*int*/ lParam) {
if (!hooks (SWT.MouseExit) && !filters (SWT.MouseExit)) return null;
int pos = OS.GetMessagePos ();
POINT pt = new POINT ();
OS.POINTSTOPOINT (pt, pos);
OS.ScreenToClient (hwnd, pt);
lParam = OS.MAKELPARAM (pt.x, pt.y);
if (!sendMouseEvent (SWT.MouseExit, 0, hwnd, OS.WM_MOUSELEAVE, wParam, lParam)) {
return LRESULT.ZERO;
}
return null;
}
LRESULT wmMouseMove (long /*int*/ hwnd, long /*int*/ wParam, long /*int*/ lParam) {
LRESULT result = null;
Display display = this.display;
int pos = OS.GetMessagePos ();
if (pos != display.lastMouse || display.captureChanged) {
if (!OS.IsWinCE) {
boolean trackMouse = (state & TRACK_MOUSE) != 0;
boolean mouseEnter = hooks (SWT.MouseEnter) || display.filters (SWT.MouseEnter);
boolean mouseExit = hooks (SWT.MouseExit) || display.filters (SWT.MouseExit);
boolean mouseHover = hooks (SWT.MouseHover) || display.filters (SWT.MouseHover);
if (trackMouse || mouseEnter || mouseExit || mouseHover) {
TRACKMOUSEEVENT lpEventTrack = new TRACKMOUSEEVENT ();
lpEventTrack.cbSize = TRACKMOUSEEVENT.sizeof;
lpEventTrack.dwFlags = OS.TME_QUERY;
lpEventTrack.hwndTrack = hwnd;
OS.TrackMouseEvent (lpEventTrack);
if (lpEventTrack.dwFlags == 0) {
lpEventTrack.dwFlags = OS.TME_LEAVE | OS.TME_HOVER;
lpEventTrack.hwndTrack = hwnd;
OS.TrackMouseEvent (lpEventTrack);
if (mouseEnter) {
/*
* Force all outstanding WM_MOUSELEAVE messages to be dispatched before
* issuing a mouse enter. This causes mouse exit events to be processed
* before mouse enter events. Note that WM_MOUSELEAVE is posted to the
* event queue by TrackMouseEvent().
*/
MSG msg = new MSG ();
int flags = OS.PM_REMOVE | OS.PM_NOYIELD | OS.PM_QS_INPUT | OS.PM_QS_POSTMESSAGE;
while (OS.PeekMessage (msg, 0, OS.WM_MOUSELEAVE, OS.WM_MOUSELEAVE, flags)) {
OS.TranslateMessage (msg);
OS.DispatchMessage (msg);
}
sendMouseEvent (SWT.MouseEnter, 0, hwnd, OS.WM_MOUSEMOVE, wParam, lParam);
}
} else {
lpEventTrack.dwFlags = OS.TME_HOVER;
OS.TrackMouseEvent (lpEventTrack);
}
}
}
if (pos != display.lastMouse) {
display.lastMouse = pos;
if (!sendMouseEvent (SWT.MouseMove, 0, hwnd, OS.WM_MOUSEMOVE, wParam, lParam)) {
result = LRESULT.ZERO;
}
}
}
display.captureChanged = false;
return result;
}
LRESULT wmMouseWheel (long /*int*/ hwnd, long /*int*/ wParam, long /*int*/ lParam) {
return sendMouseWheelEvent(SWT.MouseWheel, hwnd, wParam, lParam) ? null : LRESULT.ZERO;
}
LRESULT wmMouseHWheel (long /*int*/ hwnd, long /*int*/ wParam, long /*int*/ lParam) {
return sendMouseWheelEvent(SWT.MouseHorizontalWheel, hwnd, wParam, lParam) ? null : LRESULT.ZERO;
}
LRESULT wmNCPaint (long /*int*/ hwnd, long /*int*/ wParam, long /*int*/ lParam) {
return null;
}
LRESULT wmPaint (long /*int*/ hwnd, long /*int*/ wParam, long /*int*/ lParam) {
/* Exit early - don't draw the background */
if (!hooks (SWT.Paint) && !filters (SWT.Paint)) {
return null;
}
/* Issue a paint event */
long /*int*/ result = 0;
if (OS.IsWinCE) {
RECT rect = new RECT ();
OS.GetUpdateRect (hwnd, rect, false);
result = callWindowProc (hwnd, OS.WM_PAINT, wParam, lParam);
/*
* Bug in Windows. When InvalidateRgn(), InvalidateRect()
* or RedrawWindow() with RDW_INVALIDATE is called from
* within WM_PAINT to invalidate a region for a further
* BeginPaint(), the caret is not properly erased causing
* pixel corruption. The fix is to hide and show the
* caret.
*/
OS.HideCaret (hwnd);
OS.InvalidateRect (hwnd, rect, false);
OS.ShowCaret (hwnd);
PAINTSTRUCT ps = new PAINTSTRUCT ();
GCData data = new GCData ();
data.ps = ps;
data.hwnd = hwnd;
GC gc = new_GC (data);
if (gc != null) {
int width = ps.right - ps.left;
int height = ps.bottom - ps.top;
if (width != 0 && height != 0) {
Event event = new Event ();
event.gc = gc;
event.x = ps.left;
event.y = ps.top;
event.width = width;
event.height = height;
sendEvent (SWT.Paint, event);
// widget could be disposed at this point
event.gc = null;
}
gc.dispose ();
}
} else {
long /*int*/ rgn = OS.CreateRectRgn (0, 0, 0, 0);
OS.GetUpdateRgn (hwnd, rgn, false);
result = callWindowProc (hwnd, OS.WM_PAINT, wParam, lParam);
GCData data = new GCData ();
data.hwnd = hwnd;
GC gc = new_GC (data);
if (gc != null) {
OS.HideCaret (hwnd);
RECT rect = new RECT();
OS.GetRgnBox (rgn, rect);
int width = rect.right - rect.left;
int height = rect.bottom - rect.top;
if (width != 0 && height != 0) {
long /*int*/ hDC = gc.handle;
OS.SelectClipRgn (hDC, rgn);
OS.SetMetaRgn (hDC);
Event event = new Event ();
event.gc = gc;
event.x = rect.left;
event.y = rect.top;
event.width = width;
event.height = height;
sendEvent (SWT.Paint, event);
// widget could be disposed at this point
event.gc = null;
}
gc.dispose ();
OS.ShowCaret (hwnd);
}
OS.DeleteObject (rgn);
}
if (result == 0) return LRESULT.ZERO;
return new LRESULT (result);
}
LRESULT wmPrint (long /*int*/ hwnd, long /*int*/ wParam, long /*int*/ lParam) {
/*
* Bug in Windows. When WM_PRINT is used to print the contents
* of a control that has WS_EX_CLIENTEDGE, the old 3D border is
* drawn instead of the theme border. The fix is to call the
* default window proc and then draw the theme border on top.
*/
if ((lParam & OS.PRF_NONCLIENT) != 0) {
if (OS.COMCTL32_MAJOR >= 6 && OS.IsAppThemed ()) {
int bits = OS.GetWindowLong (hwnd, OS.GWL_EXSTYLE);
if ((bits & OS.WS_EX_CLIENTEDGE) != 0) {
long /*int*/ code = callWindowProc (hwnd, OS.WM_PRINT, wParam, lParam);
RECT rect = new RECT ();
OS.GetWindowRect (hwnd, rect);
rect.right -= rect.left;
rect.bottom -= rect.top;
rect.left = rect.top = 0;
int border = OS.GetSystemMetrics (OS.SM_CXEDGE);
OS.ExcludeClipRect (wParam, border, border, rect.right - border, rect.bottom - border);
OS.DrawThemeBackground (display.hEditTheme (), wParam, OS.EP_EDITTEXT, OS.ETS_NORMAL, rect, null);
return new LRESULT (code);
}
}
}
return null;
}
LRESULT wmRButtonDblClk (long /*int*/ hwnd, long /*int*/ wParam, long /*int*/ lParam) {
/*
* Feature in Windows. Windows sends the following
* messages when the user double clicks the mouse:
*
* WM_RBUTTONDOWN - mouse down
* WM_RBUTTONUP - mouse up
* WM_RBUTTONDBLCLK - double click
* WM_LBUTTONUP - mouse up
*
* Applications that expect matching mouse down/up
* pairs will not see the second mouse down. The
* fix is to send a mouse down event.
*/
LRESULT result = null;
Display display = this.display;
display.captureChanged = false;
sendMouseEvent (SWT.MouseDown, 3, hwnd, OS.WM_RBUTTONDOWN, wParam, lParam);
if (sendMouseEvent (SWT.MouseDoubleClick, 3, hwnd, OS.WM_RBUTTONDBLCLK, wParam, lParam)) {
result = new LRESULT (callWindowProc (hwnd, OS.WM_RBUTTONDBLCLK, wParam, lParam));
} else {
result = LRESULT.ZERO;
}
if (!display.captureChanged && !isDisposed ()) {
if (OS.GetCapture () != hwnd) OS.SetCapture (hwnd);
}
return result;
}
LRESULT wmRButtonDown (long /*int*/ hwnd, long /*int*/ wParam, long /*int*/ lParam) {
LRESULT result = null;
Display display = this.display;
display.captureChanged = false;
if (sendMouseEvent (SWT.MouseDown, 3, hwnd, OS.WM_RBUTTONDOWN, wParam, lParam)) {
result = new LRESULT (callWindowProc (hwnd, OS.WM_RBUTTONDOWN, wParam, lParam));
} else {
result = LRESULT.ZERO;
}
if (!display.captureChanged && !isDisposed ()) {
if (OS.GetCapture () != hwnd) OS.SetCapture (hwnd);
}
return result;
}
LRESULT wmRButtonUp (long /*int*/ hwnd, long /*int*/ wParam, long /*int*/ lParam) {
Display display = this.display;
LRESULT result = null;
if (sendMouseEvent (SWT.MouseUp, 3, hwnd, OS.WM_RBUTTONUP, wParam, lParam)) {
result = new LRESULT (callWindowProc (hwnd, OS.WM_RBUTTONUP, wParam, lParam));
} else {
/* Call the DefWindowProc() to support WM_CONTEXTMENU */
OS.DefWindowProc (hwnd, OS.WM_RBUTTONUP, wParam, lParam);
result = LRESULT.ZERO;
}
/*
* Bug in Windows. On some machines that do not have XBUTTONs,
* the MK_XBUTTON1 and OS.MK_XBUTTON2 bits are sometimes set,
* causing mouse capture to become stuck. The fix is to test
* for the extra buttons only when they exist.
*/
int mask = OS.MK_LBUTTON | OS.MK_MBUTTON | OS.MK_RBUTTON;
if (display.xMouse) mask |= OS.MK_XBUTTON1 | OS.MK_XBUTTON2;
if ((wParam & mask) == 0) {
if (OS.GetCapture () == hwnd) OS.ReleaseCapture ();
}
return result;
}
LRESULT wmSetFocus (long /*int*/ hwnd, long /*int*/ wParam, long /*int*/ lParam) {
long /*int*/ code = callWindowProc (hwnd, OS.WM_SETFOCUS, wParam, lParam);
sendFocusEvent (SWT.FocusIn);
// widget could be disposed at this point
/*
* It is possible (but unlikely), that application
* code could have disposed the widget in the focus
* or activate events. If this happens, end the
* processing of the Windows message by returning
* zero as the result of the window proc.
*/
if (isDisposed ()) return LRESULT.ZERO;
if (code == 0) return LRESULT.ZERO;
return new LRESULT (code);
}
LRESULT wmSysChar (long /*int*/ hwnd, long /*int*/ wParam, long /*int*/ lParam) {
Display display = this.display;
display.lastAscii = (int)/*64*/wParam;
display.lastNull = wParam == 0;
/* Do not issue a key down if a menu bar mnemonic was invoked */
if (!hooks (SWT.KeyDown) && !display.filters (SWT.KeyDown)) {
return null;
}
/* Call the window proc to determine whether it is a system key or mnemonic */
boolean oldKeyHit = display.mnemonicKeyHit;
display.mnemonicKeyHit = true;
long /*int*/ result = callWindowProc (hwnd, OS.WM_SYSCHAR, wParam, lParam);
boolean consumed = false;
if (!display.mnemonicKeyHit) {
consumed = !sendKeyEvent (SWT.KeyDown, OS.WM_SYSCHAR, wParam, lParam);
// widget could be disposed at this point
}
consumed |= display.mnemonicKeyHit;
display.mnemonicKeyHit = oldKeyHit;
return consumed ? LRESULT.ONE : new LRESULT (result);
}
LRESULT wmSysKeyDown (long /*int*/ hwnd, long /*int*/ wParam, long /*int*/ lParam) {
/*
* Feature in Windows. When WM_SYSKEYDOWN is sent,
* the user pressed ALT+<key> or F10 to get to the
* menu bar. In order to issue events for F10 but
* ignore other key presses when the ALT is not down,
* make sure that either F10 was pressed or that ALT
* is pressed.
*/
if (wParam != OS.VK_F10) {
/* Make sure WM_SYSKEYDOWN was sent by ALT-<aKey>. */
if ((lParam & 0x20000000) == 0) return null;
}
/* Ignore well known system keys */
switch ((int)/*64*/wParam) {
case OS.VK_F4: {
long /*int*/ hwndShell = hwnd;
while (OS.GetParent (hwndShell) != 0) {
if (OS.GetWindow (hwndShell, OS.GW_OWNER) != 0) break;
hwndShell = OS.GetParent (hwndShell);
}
int bits = OS.GetWindowLong (hwndShell, OS.GWL_STYLE);
if ((bits & OS.WS_SYSMENU) != 0) return null;
}
}
/* Ignore repeating modifier keys by testing key down state */
switch ((int)/*64*/wParam) {
case OS.VK_SHIFT:
case OS.VK_MENU:
case OS.VK_CONTROL:
case OS.VK_CAPITAL:
case OS.VK_NUMLOCK:
case OS.VK_SCROLL:
if ((lParam & 0x40000000) != 0) return null;
}
/* Clear last key and last ascii because a new key has been typed */
display.lastAscii = display.lastKey = 0;
display.lastVirtual = display.lastNull = display.lastDead = false;
/* If are going to get a WM_SYSCHAR, ignore this message. */
/*
* Bug in WinCE. MapVirtualKey() returns incorrect values.
* The fix is to rely on a key mappings table to determine
* whether the key event must be sent now or if a WM_CHAR
* event will follow. The key mappings table maps virtual
* keys to SWT key codes and does not contain mappings for
* Windows virtual keys like VK_A. Virtual keys that are
* both virtual and ASCII are a special case.
*/
int mapKey = 0;
if (OS.IsWinCE) {
switch ((int)/*64*/wParam) {
case OS.VK_BACK: mapKey = SWT.BS; break;
case OS.VK_RETURN: mapKey = SWT.CR; break;
case OS.VK_DELETE: mapKey = SWT.DEL; break;
case OS.VK_ESCAPE: mapKey = SWT.ESC; break;
case OS.VK_TAB: mapKey = SWT.TAB; break;
}
} else {
mapKey = OS.MapVirtualKey ((int)/*64*/wParam, 2);
}
display.lastVirtual = mapKey == 0 || display.numpadKey ((int)/*64*/wParam) != 0;
if (display.lastVirtual) {
display.lastKey = (int)/*64*/wParam;
/*
* Feature in Windows. The virtual key VK_DELETE is not
* treated as both a virtual key and an ASCII key by Windows.
* Therefore, we will not receive a WM_SYSCHAR for this key.
* The fix is to treat VK_DELETE as a special case and map
* the ASCII value explicitly (Delete is 0x7F).
*/
if (display.lastKey == OS.VK_DELETE) display.lastAscii = 0x7F;
/* When a keypad key is typed, a WM_SYSCHAR is not issued */
if (OS.VK_NUMPAD0 <= display.lastKey && display.lastKey <= OS.VK_DIVIDE) {
/*
* A WM_SYSCHAR will be issued for '*', '+', '-', '.' and '/'
* on the numeric keypad. Avoid issuing the key event twice
* by checking for these keys. Note that calling to ToAscii()
* or ToUnicode(), clear the character that is entered using
* the special Windows keypad sequence when NumLock is down
* (ie. typing ALT+0231 should gives 'c' with a cedilla when
* NumLock is down). Do not call either of these from here.
*/
switch (display.lastKey) {
case OS.VK_MULTIPLY:
case OS.VK_ADD:
case OS.VK_SUBTRACT:
case OS.VK_DECIMAL:
case OS.VK_DIVIDE: return null;
}
display.lastAscii = display.numpadKey (display.lastKey);
}
} else {
/*
* Convert LastKey to lower case because Windows non-virtual
* keys that are also ASCII keys, such as like VK_A, are have
* upper case values in WM_SYSKEYDOWN despite the fact that the
* Shift was not pressed.
*/
display.lastKey = (int)/*64*/OS.CharLower ((short) mapKey);
/*
* Feature in Windows 98. MapVirtualKey() indicates that
* a WM_SYSCHAR message will occur for Alt+Enter but
* this message never happens. The fix is to issue the
* event from WM_SYSKEYDOWN and map VK_RETURN to '\r'.
*/
if (OS.IsWinNT) return null;
if (wParam != OS.VK_RETURN) return null;
display.lastAscii = '\r';
}
if (!sendKeyEvent (SWT.KeyDown, OS.WM_SYSKEYDOWN, wParam, lParam)) {
return LRESULT.ONE;
}
// widget could be disposed at this point
return null;
}
LRESULT wmSysKeyUp (long /*int*/ hwnd, long /*int*/ wParam, long /*int*/ lParam) {
return wmKeyUp (hwnd, wParam, lParam);
}
LRESULT wmXButtonDblClk (long /*int*/ hwnd, long /*int*/ wParam, long /*int*/ lParam) {
/*
* Feature in Windows. Windows sends the following
* messages when the user double clicks the mouse:
*
* WM_XBUTTONDOWN - mouse down
* WM_XBUTTONUP - mouse up
* WM_XLBUTTONDBLCLK - double click
* WM_XBUTTONUP - mouse up
*
* Applications that expect matching mouse down/up
* pairs will not see the second mouse down. The
* fix is to send a mouse down event.
*/
LRESULT result = null;
Display display = this.display;
display.captureChanged = false;
int button = OS.HIWORD (wParam) == OS.XBUTTON1 ? 4 : 5;
sendMouseEvent (SWT.MouseDown, button, hwnd, OS.WM_XBUTTONDOWN, wParam, lParam);
if (sendMouseEvent (SWT.MouseDoubleClick, button, hwnd, OS.WM_XBUTTONDBLCLK, wParam, lParam)) {
result = new LRESULT (callWindowProc (hwnd, OS.WM_XBUTTONDBLCLK, wParam, lParam));
} else {
result = LRESULT.ZERO;
}
if (!display.captureChanged && !isDisposed ()) {
if (OS.GetCapture () != hwnd) OS.SetCapture (hwnd);
}
return result;
}
LRESULT wmXButtonDown (long /*int*/ hwnd, long /*int*/ wParam, long /*int*/ lParam) {
LRESULT result = null;
Display display = this.display;
display.captureChanged = false;
display.xMouse = true;
int button = OS.HIWORD (wParam) == OS.XBUTTON1 ? 4 : 5;
if (sendMouseEvent (SWT.MouseDown, button, hwnd, OS.WM_XBUTTONDOWN, wParam, lParam)) {
result = new LRESULT (callWindowProc (hwnd, OS.WM_XBUTTONDOWN, wParam, lParam));
} else {
result = LRESULT.ZERO;
}
if (!display.captureChanged && !isDisposed ()) {
if (OS.GetCapture () != hwnd) OS.SetCapture (hwnd);
}
return result;
}
LRESULT wmXButtonUp (long /*int*/ hwnd, long /*int*/ wParam, long /*int*/ lParam) {
Display display = this.display;
LRESULT result = null;
int button = OS.HIWORD (wParam) == OS.XBUTTON1 ? 4 : 5;
if (sendMouseEvent (SWT.MouseUp, button, hwnd, OS.WM_XBUTTONUP, wParam, lParam)) {
result = new LRESULT (callWindowProc (hwnd, OS.WM_XBUTTONUP, wParam, lParam));
} else {
result = LRESULT.ZERO;
}
/*
* Bug in Windows. On some machines that do not have XBUTTONs,
* the MK_XBUTTON1 and OS.MK_XBUTTON2 bits are sometimes set,
* causing mouse capture to become stuck. The fix is to test
* for the extra buttons only when they exist.
*/
int mask = OS.MK_LBUTTON | OS.MK_MBUTTON | OS.MK_RBUTTON;
if (display.xMouse) mask |= OS.MK_XBUTTON1 | OS.MK_XBUTTON2;
if ((wParam & mask) == 0) {
if (OS.GetCapture () == hwnd) OS.ReleaseCapture ();
}
return result;
}
}