/*******************************************************************************
* 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.graphics.*;
import org.eclipse.swt.internal.*;
import org.eclipse.swt.internal.win32.*;
/**
* Instances of this class are controls which are capable
* of containing other controls.
* <dl>
* <dt><b>Styles:</b></dt>
* <dd>NO_BACKGROUND, NO_FOCUS, NO_MERGE_PAINTS, NO_REDRAW_RESIZE, NO_RADIO_GROUP, EMBEDDED, DOUBLE_BUFFERED</dd>
* <dt><b>Events:</b></dt>
* <dd>(none)</dd>
* </dl>
* <p>
* Note: The <code>NO_BACKGROUND</code>, <code>NO_FOCUS</code>, <code>NO_MERGE_PAINTS</code>,
* and <code>NO_REDRAW_RESIZE</code> styles are intended for use with <code>Canvas</code>.
* They can be used with <code>Composite</code> if you are drawing your own, but their
* behavior is undefined if they are used with subclasses of <code>Composite</code> other
* than <code>Canvas</code>.
* </p><p>
* Note: The <code>CENTER</code> style, although undefined for composites, has the
* same value as <code>EMBEDDED</code> which is used to embed widgets from other
* widget toolkits into SWT. On some operating systems (GTK, Motif), this may cause
* the children of this composite to be obscured.
* </p><p>
* This class may be subclassed by custom control implementors
* who are building controls that are constructed from aggregates
* of other controls.
* </p>
*
* @see Canvas
* @see <a href="http://www.eclipse.org/swt/snippets/#composite">Composite snippets</a>
* @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
*/
public class Composite extends Scrollable {
Layout layout;
WINDOWPOS [] lpwp;
Control [] tabList;
int layoutCount, backgroundMode;
static final int TOOLTIP_LIMIT = 4096;
/**
* Prevents uninitialized instances from being created outside the package.
*/
Composite () {
}
/**
* 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>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
* </ul>
*
* @see SWT#NO_BACKGROUND
* @see SWT#NO_FOCUS
* @see SWT#NO_MERGE_PAINTS
* @see SWT#NO_REDRAW_RESIZE
* @see SWT#NO_RADIO_GROUP
* @see SWT#EMBEDDED
* @see SWT#DOUBLE_BUFFERED
* @see Widget#getStyle
*/
public Composite (Composite parent, int style) {
super (parent, style);
}
Control [] _getChildren () {
int count = 0;
long /*int*/ hwndChild = OS.GetWindow (handle, OS.GW_CHILD);
if (hwndChild == 0) return new Control [0];
while (hwndChild != 0) {
count++;
hwndChild = OS.GetWindow (hwndChild, OS.GW_HWNDNEXT);
}
Control [] children = new Control [count];
int index = 0;
hwndChild = OS.GetWindow (handle, OS.GW_CHILD);
while (hwndChild != 0) {
Control control = display.getControl (hwndChild);
if (control != null && control != this) {
children [index++] = control;
}
hwndChild = OS.GetWindow (hwndChild, OS.GW_HWNDNEXT);
}
if (count == index) return children;
Control [] newChildren = new Control [index];
System.arraycopy (children, 0, newChildren, 0, index);
return newChildren;
}
Control [] _getTabList () {
if (tabList == null) return tabList;
int count = 0;
for (int i=0; i<tabList.length; i++) {
if (!tabList [i].isDisposed ()) count++;
}
if (count == tabList.length) return tabList;
Control [] newList = new Control [count];
int index = 0;
for (int i=0; i<tabList.length; i++) {
if (!tabList [i].isDisposed ()) {
newList [index++] = tabList [i];
}
}
tabList = newList;
return tabList;
}
/**
* Clears any data that has been cached by a Layout for all widgets that
* are in the parent hierarchy of the changed control up to and including the
* receiver. If an ancestor does not have a layout, it is skipped.
*
* @param changed an array of controls that changed state and require a recalculation of size
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_INVALID_ARGUMENT - if the changed array is null any of its controls are null or have been disposed</li>
* <li>ERROR_INVALID_PARENT - if any control in changed is not in the widget tree of the receiver</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>
*
* @since 3.1
*/
public void changed (Control[] changed) {
checkWidget ();
if (changed == null) error (SWT.ERROR_INVALID_ARGUMENT);
for (int i=0; i<changed.length; i++) {
Control control = changed [i];
if (control == null) error (SWT.ERROR_INVALID_ARGUMENT);
if (control.isDisposed ()) error (SWT.ERROR_INVALID_ARGUMENT);
boolean ancestor = false;
Composite composite = control.parent;
while (composite != null) {
ancestor = composite == this;
if (ancestor) break;
composite = composite.parent;
}
if (!ancestor) error (SWT.ERROR_INVALID_PARENT);
}
for (int i=0; i<changed.length; i++) {
Control child = changed [i];
Composite composite = child.parent;
while (child != this) {
if (composite.layout == null || !composite.layout.flushCache (child)) {
composite.state |= LAYOUT_CHANGED;
}
child = composite;
composite = child.parent;
}
}
}
void checkBuffered () {
if (OS.IsWinCE || (state & CANVAS) == 0) {
super.checkBuffered ();
}
}
void checkComposited () {
if ((state & CANVAS) != 0) {
if ((style & SWT.TRANSPARENT) != 0) {
long /*int*/ hwndParent = parent.handle;
int bits = OS.GetWindowLong (hwndParent, OS.GWL_EXSTYLE);
bits |= OS.WS_EX_COMPOSITED;
OS.SetWindowLong (hwndParent, OS.GWL_EXSTYLE, bits);
}
}
}
protected void checkSubclass () {
/* Do nothing - Subclassing is allowed */
}
Widget [] computeTabList () {
Widget result [] = super.computeTabList ();
if (result.length == 0) return result;
Control [] list = tabList != null ? _getTabList () : _getChildren ();
for (int i=0; i<list.length; i++) {
Control child = list [i];
Widget [] childList = child.computeTabList ();
if (childList.length != 0) {
Widget [] newResult = new Widget [result.length + childList.length];
System.arraycopy (result, 0, newResult, 0, result.length);
System.arraycopy (childList, 0, newResult, result.length, childList.length);
result = newResult;
}
}
return result;
}
public Point computeSize (int wHint, int hHint, boolean changed) {
checkWidget ();
display.runSkin ();
Point size;
if (layout != null) {
if (wHint == SWT.DEFAULT || hHint == SWT.DEFAULT) {
changed |= (state & LAYOUT_CHANGED) != 0;
state &= ~LAYOUT_CHANGED;
size = layout.computeSize (this, wHint, hHint, changed);
} else {
size = new Point (wHint, hHint);
}
} else {
size = minimumSize (wHint, hHint, changed);
if (size.x == 0) size.x = DEFAULT_WIDTH;
if (size.y == 0) size.y = DEFAULT_HEIGHT;
}
if (wHint != SWT.DEFAULT) size.x = wHint;
if (hHint != SWT.DEFAULT) size.y = hHint;
Rectangle trim = computeTrim (0, 0, size.x, size.y);
return new Point (trim.width, trim.height);
}
/**
* Copies a rectangular area of the receiver at the specified
* position using the gc.
*
* @param gc the gc where the rectangle is to be filled
* @param x the x coordinate of the rectangle to be filled
* @param y the y coordinate of the rectangle to be filled
* @param width the width of the rectangle to be filled
* @param height the height of the rectangle to be filled
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the gc is null</li>
* <li>ERROR_INVALID_ARGUMENT - if the gc has been disposed</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>
*/
/*public*/ void copyArea (GC gc, int x, int y, int width, int height) {
checkWidget ();
if (gc == null) error (SWT.ERROR_NULL_ARGUMENT);
if (gc.isDisposed ()) error (SWT.ERROR_INVALID_ARGUMENT);
//XP only, no GDI+
//#define PW_CLIENTONLY 0x00000001
//DCOrg() wrong
//topHandle wrong for Tree?
long /*int*/ hDC = gc.handle;
int nSavedDC = OS.SaveDC (hDC);
OS.IntersectClipRect (hDC, 0, 0, width, height);
//WRONG PARENT
POINT lpPoint = new POINT ();
long /*int*/ hwndParent = OS.GetParent (handle);
OS.MapWindowPoints (handle, hwndParent, lpPoint, 1);
RECT rect = new RECT ();
OS.GetWindowRect (handle, rect);
POINT lpPoint1 = new POINT (), lpPoint2 = new POINT ();
x = x + (lpPoint.x - rect.left);
y = y + (lpPoint.y - rect.top);
OS.SetWindowOrgEx (hDC, x, y, lpPoint1);
OS.SetBrushOrgEx (hDC, x, y, lpPoint2);
int bits = OS.GetWindowLong (handle, OS.GWL_STYLE);
if ((bits & OS.WS_VISIBLE) == 0) {
OS.DefWindowProc (handle, OS.WM_SETREDRAW, 1, 0);
}
//NECESSARY?
OS.RedrawWindow (handle, null, 0, OS.RDW_UPDATENOW | OS.RDW_ALLCHILDREN);
OS.PrintWindow (handle, hDC, 0);//0x00000001);
if ((bits & OS.WS_VISIBLE) == 0) {
OS.DefWindowProc(handle, OS.WM_SETREDRAW, 0, 0);
}
OS.RestoreDC (hDC, nSavedDC);
}
void createHandle () {
super.createHandle ();
state |= CANVAS;
if ((style & (SWT.H_SCROLL | SWT.V_SCROLL)) == 0 || findThemeControl () == parent) {
state |= THEME_BACKGROUND;
}
if ((style & SWT.TRANSPARENT) != 0) {
int bits = OS.GetWindowLong (handle, OS.GWL_EXSTYLE);
bits |= OS.WS_EX_TRANSPARENT;
OS.SetWindowLong (handle, OS.GWL_EXSTYLE, bits);
}
}
/**
* Fills the interior of the rectangle specified by the arguments,
* with the receiver's background.
*
* <p>The <code>offsetX</code> and <code>offsetY</code> are used to map from
* the <code>gc</code> origin to the origin of the parent image background. This is useful
* to ensure proper alignment of the image background.</p>
*
* @param gc the gc where the rectangle is to be filled
* @param x the x coordinate of the rectangle to be filled
* @param y the y coordinate of the rectangle to be filled
* @param width the width of the rectangle to be filled
* @param height the height of the rectangle to be filled
* @param offsetX the image background x offset
* @param offsetY the image background y offset
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the gc is null</li>
* <li>ERROR_INVALID_ARGUMENT - if the gc has been disposed</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>
*
* @since 3.6
*/
public void drawBackground(GC gc, int x, int y, int width, int height, int offsetX, int offsetY) {
checkWidget ();
if (gc == null) error (SWT.ERROR_NULL_ARGUMENT);
if (gc.isDisposed ()) error (SWT.ERROR_INVALID_ARGUMENT);
RECT rect = new RECT ();
OS.SetRect (rect, x, y, x + width, y + height);
long /*int*/ hDC = gc.handle;
int pixel = background == -1 ? gc.getBackground ().handle : -1;
drawBackground (hDC, rect, pixel, offsetX, offsetY);
}
Composite findDeferredControl () {
return layoutCount > 0 ? this : parent.findDeferredControl ();
}
Menu [] findMenus (Control control) {
if (control == this) return new Menu [0];
Menu result [] = super.findMenus (control);
Control [] children = _getChildren ();
for (int i=0; i<children.length; i++) {
Control child = children [i];
Menu [] menuList = child.findMenus (control);
if (menuList.length != 0) {
Menu [] newResult = new Menu [result.length + menuList.length];
System.arraycopy (result, 0, newResult, 0, result.length);
System.arraycopy (menuList, 0, newResult, result.length, menuList.length);
result = newResult;
}
}
return result;
}
void fixChildren (Shell newShell, Shell oldShell, Decorations newDecorations, Decorations oldDecorations, Menu [] menus) {
super.fixChildren (newShell, oldShell, newDecorations, oldDecorations, menus);
Control [] children = _getChildren ();
for (int i=0; i<children.length; i++) {
children [i].fixChildren (newShell, oldShell, newDecorations, oldDecorations, menus);
}
}
void fixTabList (Control control) {
if (tabList == null) return;
int count = 0;
for (int i=0; i<tabList.length; i++) {
if (tabList [i] == control) count++;
}
if (count == 0) return;
Control [] newList = null;
int length = tabList.length - count;
if (length != 0) {
newList = new Control [length];
int index = 0;
for (int i=0; i<tabList.length; i++) {
if (tabList [i] != control) {
newList [index++] = tabList [i];
}
}
}
tabList = newList;
}
/**
* Returns the receiver's background drawing mode. This
* will be one of the following constants defined in class
* <code>SWT</code>:
* <code>INHERIT_NONE</code>, <code>INHERIT_DEFAULT</code>,
* <code>INHERIT_FORCE</code>.
*
* @return the background mode
*
* @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
*
* @since 3.2
*/
public int getBackgroundMode () {
checkWidget ();
return backgroundMode;
}
/**
* Returns a (possibly empty) array containing the receiver's children.
* Children are returned in the order that they are drawn. The topmost
* control appears at the beginning of the array. Subsequent controls
* draw beneath this control and appear later in the array.
* <p>
* Note: This is not the actual structure used by the receiver
* to maintain its list of children, so modifying the array will
* not affect the receiver.
* </p>
*
* @return an array of children
*
* @see Control#moveAbove
* @see Control#moveBelow
*
* @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 Control [] getChildren () {
checkWidget ();
return _getChildren ();
}
int getChildrenCount () {
/*
* NOTE: The current implementation will count
* non-registered children.
*/
int count = 0;
long /*int*/ hwndChild = OS.GetWindow (handle, OS.GW_CHILD);
while (hwndChild != 0) {
count++;
hwndChild = OS.GetWindow (hwndChild, OS.GW_HWNDNEXT);
}
return count;
}
/**
* Returns layout which is associated with the receiver, or
* null if one has not been set.
*
* @return the receiver's layout or null
*
* @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 Layout getLayout () {
checkWidget ();
return layout;
}
/**
* Gets the (possibly empty) tabbing order for the control.
*
* @return tabList the ordered list of controls representing the tab order
*
* @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 #setTabList
*/
public Control [] getTabList () {
checkWidget ();
Control [] tabList = _getTabList ();
if (tabList == null) {
int count = 0;
Control [] list =_getChildren ();
for (int i=0; i<list.length; i++) {
if (list [i].isTabGroup ()) count++;
}
tabList = new Control [count];
int index = 0;
for (int i=0; i<list.length; i++) {
if (list [i].isTabGroup ()) {
tabList [index++] = list [i];
}
}
}
return tabList;
}
boolean hooksKeys () {
return hooks (SWT.KeyDown) || hooks (SWT.KeyUp);
}
/**
* Returns <code>true</code> if the receiver has deferred
* the performing of layout, and <code>false</code> otherwise.
*
* @return the receiver's deferred layout state
*
* @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 #setLayoutDeferred(boolean)
* @see #isLayoutDeferred()
*
* @since 3.1
*/
public boolean getLayoutDeferred () {
checkWidget ();
return layoutCount > 0 ;
}
/**
* Returns <code>true</code> if the receiver or any ancestor
* up to and including the receiver's nearest ancestor shell
* has deferred the performing of layouts. Otherwise, <code>false</code>
* is returned.
*
* @return the receiver's deferred layout state
*
* @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 #setLayoutDeferred(boolean)
* @see #getLayoutDeferred()
*
* @since 3.1
*/
public boolean isLayoutDeferred () {
checkWidget ();
return findDeferredControl () != null;
}
/**
* If the receiver has a layout, asks the layout to <em>lay out</em>
* (that is, set the size and location of) the receiver's children.
* If the receiver does not have a layout, do nothing.
* <p>
* This is equivalent to calling <code>layout(true)</code>.
* </p>
* <p>
* Note: Layout is different from painting. If a child is
* moved or resized such that an area in the parent is
* exposed, then the parent will paint. If no child is
* affected, the parent will not paint.
* </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>
*/
public void layout () {
checkWidget ();
layout (true);
}
/**
* If the receiver has a layout, asks the layout to <em>lay out</em>
* (that is, set the size and location of) the receiver's children.
* If the argument is <code>true</code> the layout must not rely
* on any information it has cached about the immediate children. If it
* is <code>false</code> the layout may (potentially) optimize the
* work it is doing by assuming that none of the receiver's
* children has changed state since the last layout.
* If the receiver does not have a layout, do nothing.
* <p>
* If a child is resized as a result of a call to layout, the
* resize event will invoke the layout of the child. The layout
* will cascade down through all child widgets in the receiver's widget
* tree until a child is encountered that does not resize. Note that
* a layout due to a resize will not flush any cached information
* (same as <code>layout(false)</code>).
* </p>
* <p>
* Note: Layout is different from painting. If a child is
* moved or resized such that an area in the parent is
* exposed, then the parent will paint. If no child is
* affected, the parent will not paint.
* </p>
*
* @param changed <code>true</code> if the layout must flush its caches, and <code>false</code> otherwise
*
* @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 void layout (boolean changed) {
checkWidget ();
if (layout == null) return;
layout (changed, false);
}
/**
* If the receiver has a layout, asks the layout to <em>lay out</em>
* (that is, set the size and location of) the receiver's children.
* If the changed argument is <code>true</code> the layout must not rely
* on any information it has cached about its children. If it
* is <code>false</code> the layout may (potentially) optimize the
* work it is doing by assuming that none of the receiver's
* children has changed state since the last layout.
* If the all argument is <code>true</code> the layout will cascade down
* through all child widgets in the receiver's widget tree, regardless of
* whether the child has changed size. The changed argument is applied to
* all layouts. If the all argument is <code>false</code>, the layout will
* <em>not</em> cascade down through all child widgets in the receiver's widget
* tree. However, if a child is resized as a result of a call to layout, the
* resize event will invoke the layout of the child. Note that
* a layout due to a resize will not flush any cached information
* (same as <code>layout(false)</code>).
* </p>
* <p>
* Note: Layout is different from painting. If a child is
* moved or resized such that an area in the parent is
* exposed, then the parent will paint. If no child is
* affected, the parent will not paint.
* </p>
*
* @param changed <code>true</code> if the layout must flush its caches, and <code>false</code> otherwise
* @param all <code>true</code> if all children in the receiver's widget tree should be laid out, and <code>false</code> otherwise
*
* @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 3.1
*/
public void layout (boolean changed, boolean all) {
checkWidget ();
if (layout == null && !all) return;
markLayout (changed, all);
updateLayout (all);
}
/**
* Forces a lay out (that is, sets the size and location) of all widgets that
* are in the parent hierarchy of the changed control up to and including the
* receiver. The layouts in the hierarchy must not rely on any information
* cached about the changed control or any of its ancestors. The layout may
* (potentially) optimize the work it is doing by assuming that none of the
* peers of the changed control have changed state since the last layout.
* If an ancestor does not have a layout, skip it.
* <p>
* Note: Layout is different from painting. If a child is
* moved or resized such that an area in the parent is
* exposed, then the parent will paint. If no child is
* affected, the parent will not paint.
* </p>
*
* @param changed a control that has had a state change which requires a recalculation of its size
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_INVALID_ARGUMENT - if the changed array is null any of its controls are null or have been disposed</li>
* <li>ERROR_INVALID_PARENT - if any control in changed is not in the widget tree of the receiver</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>
*
* @since 3.1
*/
public void layout (Control [] changed) {
checkWidget ();
if (changed == null) error (SWT.ERROR_INVALID_ARGUMENT);
layout (changed, SWT.NONE);
}
/**
* Forces a lay out (that is, sets the size and location) of all widgets that
* are in the parent hierarchy of the changed control up to and including the
* receiver.
* <p>
* The parameter <code>flags</code> may be a combination of:
* <dl>
* <dt><b>SWT.ALL</b></dt>
* <dd>all children in the receiver's widget tree should be laid out</dd>
* <dt><b>SWT.CHANGED</b></dt>
* <dd>the layout must flush its caches</dd>
* <dt><b>SWT.DEFER</b></dt>
* <dd>layout will be deferred</dd>
* </dl>
* </p>
* <p>
* When the <code>changed</code> array is specified, the flags <code>SWT.ALL</code>
* and <code>SWT.CHANGED</code> have no effect. In this case, the layouts in the
* hierarchy must not rely on any information cached about the changed control or
* any of its ancestors. The layout may (potentially) optimize the
* work it is doing by assuming that none of the peers of the changed
* control have changed state since the last layout.
* If an ancestor does not have a layout, skip it.
* </p>
* <p>
* When the <code>changed</code> array is not specified, the flag <code>SWT.ALL</code>
* indicates that the whole widget tree should be laid out. And the flag
* <code>SWT.CHANGED</code> indicates that the layouts should flush any cached
* information for all controls that are laid out.
* </p>
* <p>
* The <code>SWT.DEFER</code> flag always causes the layout to be deferred by
* calling <code>Composite.setLayoutDeferred(true)</code> and scheduling a call
* to <code>Composite.setLayoutDeferred(false)</code>, which will happen when
* appropriate (usually before the next event is handled). When this flag is set,
* the application should not call <code>Composite.setLayoutDeferred(boolean)</code>.
* </p>
* <p>
* Note: Layout is different from painting. If a child is
* moved or resized such that an area in the parent is
* exposed, then the parent will paint. If no child is
* affected, the parent will not paint.
* </p>
*
* @param changed a control that has had a state change which requires a recalculation of its size
* @param flags the flags specifying how the layout should happen
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_INVALID_ARGUMENT - if any of the controls in changed is null or has been disposed</li>
* <li>ERROR_INVALID_PARENT - if any control in changed is not in the widget tree of the receiver</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>
*
* @since 3.6
*/
public void layout (Control [] changed, int flags) {
checkWidget ();
if (changed != null) {
for (int i=0; i<changed.length; i++) {
Control control = changed [i];
if (control == null) error (SWT.ERROR_INVALID_ARGUMENT);
if (control.isDisposed ()) error (SWT.ERROR_INVALID_ARGUMENT);
boolean ancestor = false;
Composite composite = control.parent;
while (composite != null) {
ancestor = composite == this;
if (ancestor) break;
composite = composite.parent;
}
if (!ancestor) error (SWT.ERROR_INVALID_PARENT);
}
int updateCount = 0;
Composite [] update = new Composite [16];
for (int i=0; i<changed.length; i++) {
Control child = changed [i];
Composite composite = child.parent;
while (child != this) {
if (composite.layout != null) {
composite.state |= LAYOUT_NEEDED;
if (!composite.layout.flushCache (child)) {
composite.state |= LAYOUT_CHANGED;
}
}
if (updateCount == update.length) {
Composite [] newUpdate = new Composite [update.length + 16];
System.arraycopy (update, 0, newUpdate, 0, update.length);
update = newUpdate;
}
child = update [updateCount++] = composite;
composite = child.parent;
}
}
if ((flags & SWT.DEFER) != 0) {
setLayoutDeferred (true);
display.addLayoutDeferred (this);
}
for (int i=updateCount-1; i>=0; i--) {
update [i].updateLayout (false);
}
} else {
if (layout == null && (flags & SWT.ALL) == 0) return;
markLayout ((flags & SWT.CHANGED) != 0, (flags & SWT.ALL) != 0);
if ((flags & SWT.DEFER) != 0) {
setLayoutDeferred (true);
display.addLayoutDeferred (this);
}
updateLayout ((flags & SWT.ALL) != 0);
}
}
void markLayout (boolean changed, boolean all) {
if (layout != null) {
state |= LAYOUT_NEEDED;
if (changed) state |= LAYOUT_CHANGED;
}
if (all) {
Control [] children = _getChildren ();
for (int i=0; i<children.length; i++) {
children [i].markLayout (changed, all);
}
}
}
Point minimumSize (int wHint, int hHint, boolean changed) {
Control [] children = _getChildren ();
Rectangle clientArea = getClientArea ();
int width = 0, height = 0;
for (int i=0; i<children.length; i++) {
Rectangle rect = children [i].getBounds ();
width = Math.max (width, rect.x - clientArea.x + rect.width);
height = Math.max (height, rect.y - clientArea.y + rect.height);
}
return new Point (width, height);
}
boolean redrawChildren () {
if (!super.redrawChildren ()) return false;
Control [] children = _getChildren ();
for (int i=0; i<children.length; i++) {
children [i].redrawChildren ();
}
return true;
}
void releaseParent () {
super.releaseParent ();
if ((state & CANVAS) != 0) {
if ((style & SWT.TRANSPARENT) != 0) {
long /*int*/ hwndParent = parent.handle;
long /*int*/ hwndChild = OS.GetWindow (hwndParent, OS.GW_CHILD);
while (hwndChild != 0) {
if (hwndChild != handle) {
int bits = OS.GetWindowLong (hwndParent, OS.GWL_EXSTYLE);
if ((bits & OS.WS_EX_TRANSPARENT) != 0) return;
}
hwndChild = OS.GetWindow (hwndChild, OS.GW_HWNDNEXT);
}
int bits = OS.GetWindowLong (hwndParent, OS.GWL_EXSTYLE);
bits &= ~OS.WS_EX_COMPOSITED;
OS.SetWindowLong (hwndParent, OS.GWL_EXSTYLE, bits);
}
}
}
void releaseChildren (boolean destroy) {
Control [] children = _getChildren ();
for (int i=0; i<children.length; i++) {
Control child = children [i];
if (child != null && !child.isDisposed ()) {
child.release (false);
}
}
super.releaseChildren (destroy);
}
void releaseWidget () {
super.releaseWidget ();
if ((state & CANVAS) != 0 && (style & SWT.EMBEDDED) != 0) {
long /*int*/ hwndChild = OS.GetWindow (handle, OS.GW_CHILD);
if (hwndChild != 0) {
int threadId = OS.GetWindowThreadProcessId (hwndChild, null);
if (threadId != OS.GetCurrentThreadId ()) {
OS.ShowWindow (hwndChild, OS.SW_HIDE);
OS.SetParent (hwndChild, 0);
}
}
}
layout = null;
tabList = null;
lpwp = null;
}
void removeControl (Control control) {
fixTabList (control);
resizeChildren ();
}
void reskinChildren (int flags) {
super.reskinChildren (flags);
Control [] children = _getChildren ();
for (int i=0; i<children.length; i++) {
Control child = children [i];
if (child != null) child.reskin (flags);
}
}
void resizeChildren () {
if (lpwp == null) return;
do {
WINDOWPOS [] currentLpwp = lpwp;
lpwp = null;
if (!resizeChildren (true, currentLpwp)) {
resizeChildren (false, currentLpwp);
}
} while (lpwp != null);
}
boolean resizeChildren (boolean defer, WINDOWPOS [] pwp) {
if (pwp == null) return true;
long /*int*/ hdwp = 0;
if (defer) {
hdwp = OS.BeginDeferWindowPos (pwp.length);
if (hdwp == 0) return false;
}
for (int i=0; i<pwp.length; i++) {
WINDOWPOS wp = pwp [i];
if (wp != null) {
/*
* This code is intentionally commented. All widgets that
* are created by SWT have WS_CLIPSIBLINGS to ensure that
* application code does not draw outside of the control.
*/
// int count = parent.getChildrenCount ();
// if (count > 1) {
// int bits = OS.GetWindowLong (handle, OS.GWL_STYLE);
// if ((bits & OS.WS_CLIPSIBLINGS) == 0) wp.flags |= OS.SWP_NOCOPYBITS;
// }
if (defer) {
hdwp = DeferWindowPos (hdwp, wp.hwnd, 0, wp.x, wp.y, wp.cx, wp.cy, wp.flags);
if (hdwp == 0) return false;
} else {
SetWindowPos (wp.hwnd, 0, wp.x, wp.y, wp.cx, wp.cy, wp.flags);
}
}
}
if (defer) return OS.EndDeferWindowPos (hdwp);
return true;
}
void resizeEmbeddedHandle(long /*int*/ embeddedHandle, int width, int height) {
if (embeddedHandle == 0) return;
int [] processID = new int [1];
int threadId = OS.GetWindowThreadProcessId (embeddedHandle, processID);
if (threadId != OS.GetCurrentThreadId ()) {
if (processID [0] == OS.GetCurrentProcessId ()) {
if (display.msgHook == 0) {
if (!OS.IsWinCE) {
display.getMsgCallback = new Callback (display, "getMsgProc", 3);
display.getMsgProc = display.getMsgCallback.getAddress ();
if (display.getMsgProc == 0) error (SWT.ERROR_NO_MORE_CALLBACKS);
display.msgHook = OS.SetWindowsHookEx (OS.WH_GETMESSAGE, display.getMsgProc, OS.GetLibraryHandle(), threadId);
OS.PostThreadMessage (threadId, OS.WM_NULL, 0, 0);
}
}
}
int flags = OS.SWP_NOZORDER | OS.SWP_DRAWFRAME | OS.SWP_NOACTIVATE | OS.SWP_ASYNCWINDOWPOS;
OS.SetWindowPos (embeddedHandle, 0, 0, 0, width, height, flags);
}
}
void sendResize () {
setResizeChildren (false);
super.sendResize ();
if (isDisposed ()) return;
if (layout != null) {
markLayout (false, false);
updateLayout (false, false);
}
setResizeChildren (true);
}
/**
* Sets the background drawing mode to the argument which should
* be one of the following constants defined in class <code>SWT</code>:
* <code>INHERIT_NONE</code>, <code>INHERIT_DEFAULT</code>,
* <code>INHERIT_FORCE</code>.
*
* @param mode the new background mode
*
* @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
*
* @since 3.2
*/
public void setBackgroundMode (int mode) {
checkWidget ();
backgroundMode = mode;
Control [] children = _getChildren ();
for (int i = 0; i < children.length; i++) {
children [i].updateBackgroundMode ();
}
}
void setBounds (int x, int y, int width, int height, int flags, boolean defer) {
if (display.resizeCount > Display.RESIZE_LIMIT) {
defer = false;
}
if (!defer && (state & CANVAS) != 0) {
state &= ~(RESIZE_OCCURRED | MOVE_OCCURRED);
state |= RESIZE_DEFERRED | MOVE_DEFERRED;
}
super.setBounds (x, y, width, height, flags, defer);
if (!defer && (state & CANVAS) != 0) {
boolean wasMoved = (state & MOVE_OCCURRED) != 0;
boolean wasResized = (state & RESIZE_OCCURRED) != 0;
state &= ~(RESIZE_DEFERRED | MOVE_DEFERRED);
if (wasMoved && !isDisposed ()) sendMove ();
if (wasResized && !isDisposed ()) sendResize ();
}
}
public boolean setFocus () {
checkWidget ();
Control [] children = _getChildren ();
for (int i=0; i<children.length; i++) {
Control child = children [i];
if (child.setRadioFocus (false)) return true;
}
for (int i=0; i<children.length; i++) {
Control child = children [i];
if (child.setFocus ()) return true;
}
return super.setFocus ();
}
/**
* Sets the layout which is associated with the receiver to be
* the argument which may be null.
*
* @param layout the receiver's new layout or null
*
* @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 void setLayout (Layout layout) {
checkWidget ();
this.layout = layout;
}
/**
* If the argument is <code>true</code>, causes subsequent layout
* operations in the receiver or any of its children to be ignored.
* No layout of any kind can occur in the receiver or any of its
* children until the flag is set to false.
* Layout operations that occurred while the flag was
* <code>true</code> are remembered and when the flag is set to
* <code>false</code>, the layout operations are performed in an
* optimized manner. Nested calls to this method are stacked.
*
* @param defer the new defer state
*
* @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 #layout(boolean)
* @see #layout(Control[])
*
* @since 3.1
*/
public void setLayoutDeferred (boolean defer) {
checkWidget();
if (!defer) {
if (--layoutCount == 0) {
if ((state & LAYOUT_CHILD) != 0 || (state & LAYOUT_NEEDED) != 0) {
updateLayout (true);
}
}
} else {
layoutCount++;
}
}
/**
* Sets the tabbing order for the specified controls to
* match the order that they occur in the argument list.
*
* @param tabList the ordered list of controls representing the tab order or null
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_INVALID_ARGUMENT - if a widget in the tabList is null or has been disposed</li>
* <li>ERROR_INVALID_PARENT - if widget in the tabList is not in the same widget tree</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>
*/
public void setTabList (Control [] tabList) {
checkWidget ();
if (tabList != null) {
for (int i=0; i<tabList.length; i++) {
Control control = tabList [i];
if (control == null) error (SWT.ERROR_INVALID_ARGUMENT);
if (control.isDisposed ()) error (SWT.ERROR_INVALID_ARGUMENT);
if (control.parent != this) error (SWT.ERROR_INVALID_PARENT);
}
Control [] newList = new Control [tabList.length];
System.arraycopy (tabList, 0, newList, 0, tabList.length);
tabList = newList;
}
this.tabList = tabList;
}
void setResizeChildren (boolean resize) {
if (resize) {
resizeChildren ();
} else {
if (display.resizeCount > Display.RESIZE_LIMIT) {
return;
}
int count = getChildrenCount ();
if (count > 1 && lpwp == null) {
lpwp = new WINDOWPOS [count];
}
}
}
boolean setTabGroupFocus () {
if (isTabItem ()) return setTabItemFocus ();
boolean takeFocus = (style & SWT.NO_FOCUS) == 0;
if ((state & CANVAS) != 0) {
takeFocus = hooksKeys ();
if ((style & SWT.EMBEDDED) != 0) takeFocus = true;
}
if (takeFocus && setTabItemFocus ()) return true;
Control [] children = _getChildren ();
for (int i=0; i<children.length; i++) {
Control child = children [i];
if (child.isTabItem () && child.setRadioFocus (true)) return true;
}
for (int i=0; i<children.length; i++) {
Control child = children [i];
if (child.isTabItem () && !child.isTabGroup () && child.setTabItemFocus ()) {
return true;
}
}
return false;
}
boolean updateTextDirection(int textDirection) {
if (super.updateTextDirection(textDirection)) {
/*
* OS.WS_EX_RTLREADING doesn't propagate to children
*/
Control[] children = _getChildren ();
int i = children.length;
while (i-- > 0) {
if (children[i] != null && !children[i].isDisposed ()) {
children[i].updateTextDirection(textDirection);
}
}
return true;
}
return false;
}
String toolTipText (NMTTDISPINFO hdr) {
Shell shell = getShell ();
if ((hdr.uFlags & OS.TTF_IDISHWND) == 0) {
String string = null;
ToolTip toolTip = shell.findToolTip ((int)/*64*/hdr.idFrom);
if (toolTip != null) {
string = toolTip.message;
if (string == null || string.length () == 0) string = " ";
/*
* Bug in Windows. On Windows 7, tool tips hang when displaying large
* unwrapped strings. The fix is to wrap the string ourselves.
*/
if (!OS.IsWinCE && OS.WIN32_VERSION >= OS.VERSION (6, 0)) {
if (string.length () > TOOLTIP_LIMIT / 4) {
string = display.wrapText (string, handle, toolTip.getWidth ());
}
}
}
return string;
}
shell.setToolTipTitle (hdr.hwndFrom, null, 0);
OS.SendMessage (hdr.hwndFrom, OS.TTM_SETMAXTIPWIDTH, 0, 0x7FFF);
Control control = display.getControl (hdr.idFrom);
return control != null ? control.toolTipText : null;
}
boolean translateMnemonic (Event event, Control control) {
if (super.translateMnemonic (event, control)) return true;
if (control != null) {
Control [] children = _getChildren ();
for (int i=0; i<children.length; i++) {
Control child = children [i];
if (child.translateMnemonic (event, control)) return true;
}
}
return false;
}
boolean translateTraversal (MSG msg) {
if ((state & CANVAS) != 0 ) {
if ((style & SWT.EMBEDDED) != 0) return false;
switch ((int)/*64*/msg.wParam) {
case OS.VK_UP:
case OS.VK_LEFT:
case OS.VK_DOWN:
case OS.VK_RIGHT:
case OS.VK_PRIOR:
case OS.VK_NEXT:
int uiState = (int)/*64*/OS.SendMessage (msg.hwnd, OS.WM_QUERYUISTATE, 0, 0);
if ((uiState & OS.UISF_HIDEFOCUS) != 0) {
OS.SendMessage (msg.hwnd, OS.WM_UPDATEUISTATE, OS.MAKEWPARAM (OS.UIS_CLEAR, OS.UISF_HIDEFOCUS), 0);
}
break;
}
}
return super.translateTraversal (msg);
}
void updateBackgroundColor () {
super.updateBackgroundColor ();
Control [] children = _getChildren ();
for (int i=0; i<children.length; i++) {
if ((children [i].state & PARENT_BACKGROUND) != 0) {
children [i].updateBackgroundColor ();
}
}
}
void updateBackgroundImage () {
super.updateBackgroundImage ();
Control [] children = _getChildren ();
for (int i=0; i<children.length; i++) {
if ((children [i].state & PARENT_BACKGROUND) != 0) {
children [i].updateBackgroundImage ();
}
}
}
void updateBackgroundMode () {
super.updateBackgroundMode ();
Control [] children = _getChildren ();
for (int i = 0; i < children.length; i++) {
children [i].updateBackgroundMode ();
}
}
void updateFont (Font oldFont, Font newFont) {
super.updateFont (oldFont, newFont);
Control [] children = _getChildren ();
for (int i=0; i<children.length; i++) {
Control control = children [i];
if (!control.isDisposed ()) {
control.updateFont (oldFont, newFont);
}
}
}
void updateLayout (boolean all) {
updateLayout (true, all);
}
void updateLayout (boolean resize, boolean all) {
Composite parent = findDeferredControl ();
if (parent != null) {
parent.state |= LAYOUT_CHILD;
return;
}
if ((state & LAYOUT_NEEDED) != 0) {
boolean changed = (state & LAYOUT_CHANGED) != 0;
state &= ~(LAYOUT_NEEDED | LAYOUT_CHANGED);
display.runSkin();
if (resize) setResizeChildren (false);
layout.layout (this, changed);
if (resize) setResizeChildren (true);
}
if (all) {
state &= ~LAYOUT_CHILD;
Control [] children = _getChildren ();
for (int i=0; i<children.length; i++) {
children [i].updateLayout (resize, all);
}
}
}
void updateOrientation () {
Control [] controls = _getChildren ();
RECT [] rects = new RECT [controls.length];
for (int i=0; i<controls.length; i++) {
Control control = controls [i];
RECT rect = rects [i] = new RECT();
control.forceResize ();
OS.GetWindowRect (control.topHandle (), rect);
OS.MapWindowPoints (0, handle, rect, 2);
}
int orientation = style & (SWT.LEFT_TO_RIGHT | SWT.RIGHT_TO_LEFT);
super.updateOrientation ();
for (int i=0; i<controls.length; i++) {
Control control = controls [i];
RECT rect = rects [i];
control.setOrientation (orientation);
int flags = OS.SWP_NOSIZE | OS.SWP_NOZORDER | OS.SWP_NOACTIVATE;
SetWindowPos (control.topHandle (), 0, rect.left, rect.top, 0, 0, flags);
}
}
void updateUIState () {
long /*int*/ hwndShell = getShell ().handle;
int uiState = /*64*/(int)OS.SendMessage (hwndShell, OS.WM_QUERYUISTATE, 0, 0);
if ((uiState & OS.UISF_HIDEFOCUS) != 0) {
OS.SendMessage (hwndShell, OS.WM_CHANGEUISTATE, OS.MAKEWPARAM (OS.UIS_CLEAR, OS.UISF_HIDEFOCUS), 0);
}
}
int widgetStyle () {
/* Force clipping of children by setting WS_CLIPCHILDREN */
return super.widgetStyle () | OS.WS_CLIPCHILDREN;
}
LRESULT WM_ERASEBKGND (long /*int*/ wParam, long /*int*/ lParam) {
LRESULT result = super.WM_ERASEBKGND (wParam, lParam);
if (result != null) return result;
if ((state & CANVAS) != 0) {
/* Return zero to indicate that the background was not erased */
if ((style & (SWT.NO_BACKGROUND | SWT.TRANSPARENT)) != 0) {
return LRESULT.ZERO;
}
}
return result;
}
LRESULT WM_GETDLGCODE (long /*int*/ wParam, long /*int*/ lParam) {
LRESULT result = super.WM_GETDLGCODE (wParam, lParam);
if (result != null) return result;
if ((state & CANVAS) != 0) {
int flags = 0;
if (hooksKeys ()) {
flags |= OS.DLGC_WANTALLKEYS | OS.DLGC_WANTARROWS | OS.DLGC_WANTTAB;
}
if ((style & SWT.NO_FOCUS) != 0) flags |= OS.DLGC_STATIC;
if (OS.GetWindow (handle, OS.GW_CHILD) != 0) flags |= OS.DLGC_STATIC;
if (flags != 0) return new LRESULT (flags);
}
return result;
}
LRESULT WM_GETFONT (long /*int*/ wParam, long /*int*/ lParam) {
LRESULT result = super.WM_GETFONT (wParam, lParam);
if (result != null) return result;
long /*int*/ code = callWindowProc (handle, OS.WM_GETFONT, wParam, lParam);
if (code != 0) return new LRESULT (code);
return new LRESULT (font != null ? font.handle : defaultFont ());
}
LRESULT WM_LBUTTONDOWN (long /*int*/ wParam, long /*int*/ lParam) {
LRESULT result = super.WM_LBUTTONDOWN (wParam, lParam);
if (result == LRESULT.ZERO) return result;
/* Set focus for a canvas with no children */
if ((state & CANVAS) != 0) {
if ((style & SWT.NO_FOCUS) == 0 && hooksKeys ()) {
if (OS.GetWindow (handle, OS.GW_CHILD) == 0) setFocus ();
}
}
return result;
}
LRESULT WM_NCHITTEST (long /*int*/ wParam, long /*int*/ lParam) {
LRESULT result = super.WM_NCHITTEST (wParam, lParam);
if (result != null) return result;
/*
* Bug in Windows. For some reason, under circumstances
* that are not understood, when one scrolled window is
* embedded in another and the outer window scrolls the
* inner horizontally by moving the location of the inner
* one, the vertical scroll bars of the inner window no
* longer function. Specifically, WM_NCHITTEST returns
* HTCLIENT instead of HTVSCROLL. The fix is to detect
* the case where the result of WM_NCHITTEST is HTCLIENT
* and the point is not in the client area, and redraw
* the trim, which somehow fixes the next WM_NCHITTEST.
*/
if (!OS.IsWinCE && OS.COMCTL32_MAJOR >= 6 && OS.IsAppThemed ()) {
if ((state & CANVAS)!= 0) {
long /*int*/ code = callWindowProc (handle, OS.WM_NCHITTEST, wParam, lParam);
if (code == OS.HTCLIENT) {
RECT rect = new RECT ();
OS.GetClientRect (handle, rect);
POINT pt = new POINT ();
pt.x = OS.GET_X_LPARAM (lParam);
pt.y = OS.GET_Y_LPARAM (lParam);
OS.MapWindowPoints (0, handle, pt, 1);
if (!OS.PtInRect (rect, pt)) {
int flags = OS.RDW_FRAME | OS.RDW_INVALIDATE;
OS.RedrawWindow (handle, null, 0, flags);
}
}
return new LRESULT (code);
}
}
return result;
}
LRESULT WM_PARENTNOTIFY (long /*int*/ wParam, long /*int*/ lParam) {
if ((state & CANVAS) != 0 && (style & SWT.EMBEDDED) != 0) {
if (OS.LOWORD (wParam) == OS.WM_CREATE) {
RECT rect = new RECT ();
OS.GetClientRect (handle, rect);
resizeEmbeddedHandle (lParam, rect.right - rect.left, rect.bottom - rect.top);
}
}
return super.WM_PARENTNOTIFY (wParam, lParam);
}
LRESULT WM_PAINT (long /*int*/ wParam, long /*int*/ lParam) {
if ((state & DISPOSE_SENT) != 0) return LRESULT.ZERO;
if ((state & CANVAS) == 0 || (state & FOREIGN_HANDLE) != 0) {
return super.WM_PAINT (wParam, lParam);
}
/* Set the clipping bits */
int oldBits = 0, newBits = 0;
if (!OS.IsWinCE) {
oldBits = OS.GetWindowLong (handle, OS.GWL_STYLE);
newBits = oldBits | OS.WS_CLIPSIBLINGS | OS.WS_CLIPCHILDREN;
if (newBits != oldBits) OS.SetWindowLong (handle, OS.GWL_STYLE, newBits);
}
/* Paint the control and the background */
PAINTSTRUCT ps = new PAINTSTRUCT ();
if (hooks (SWT.Paint) || filters (SWT.Paint)) {
/* Use the buffered paint when possible */
boolean bufferedPaint = false;
if ((style & SWT.DOUBLE_BUFFERED) != 0) {
if (!OS.IsWinCE && OS.WIN32_VERSION >= OS.VERSION (6, 0)) {
if ((style & (SWT.NO_MERGE_PAINTS | SWT.RIGHT_TO_LEFT)) == 0) {
if ((style & SWT.TRANSPARENT) == 0) bufferedPaint = true;
}
}
}
if (bufferedPaint) {
long /*int*/ hDC = OS.BeginPaint (handle, ps);
int width = ps.right - ps.left;
int height = ps.bottom - ps.top;
if (width != 0 && height != 0) {
long /*int*/ [] phdc = new long /*int*/ [1];
int flags = OS.BPBF_COMPATIBLEBITMAP;
RECT prcTarget = new RECT ();
OS.SetRect (prcTarget, ps.left, ps.top, ps.right, ps.bottom);
long /*int*/ hBufferedPaint = OS.BeginBufferedPaint (hDC, prcTarget, flags, null, phdc);
GCData data = new GCData ();
data.device = display;
data.foreground = getForegroundPixel ();
Control control = findBackgroundControl ();
if (control == null) control = this;
data.background = control.getBackgroundPixel ();
data.font = Font.win32_new(display, OS.SendMessage (handle, OS.WM_GETFONT, 0, 0));
data.uiState = (int)/*64*/OS.SendMessage (handle, OS.WM_QUERYUISTATE, 0, 0);
if ((style & SWT.NO_BACKGROUND) != 0) {
/* This code is intentionally commented because it may be slow to copy bits from the screen */
//paintGC.copyArea (image, ps.left, ps.top);
} else {
RECT rect = new RECT ();
OS.SetRect (rect, ps.left, ps.top, ps.right, ps.bottom);
drawBackground (phdc [0], rect);
}
GC gc = GC.win32_new (phdc [0], data);
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);
if (data.focusDrawn && !isDisposed ()) updateUIState ();
gc.dispose ();
OS.EndBufferedPaint (hBufferedPaint, true);
}
OS.EndPaint (handle, ps);
} else {
/* Create the paint GC */
GCData data = new GCData ();
data.ps = ps;
data.hwnd = handle;
GC gc = GC.win32_new (this, data);
/* Get the system region for the paint HDC */
long /*int*/ sysRgn = 0;
if ((style & (SWT.DOUBLE_BUFFERED | SWT.TRANSPARENT)) != 0 || (style & SWT.NO_MERGE_PAINTS) != 0) {
sysRgn = OS.CreateRectRgn (0, 0, 0, 0);
if (OS.GetRandomRgn (gc.handle, sysRgn, OS.SYSRGN) == 1) {
if (!OS.IsWinCE && OS.WIN32_VERSION >= OS.VERSION (4, 10)) {
if ((OS.GetLayout (gc.handle) & OS.LAYOUT_RTL) != 0) {
int nBytes = OS.GetRegionData (sysRgn, 0, null);
int [] lpRgnData = new int [nBytes / 4];
OS.GetRegionData (sysRgn, nBytes, lpRgnData);
long /*int*/ newSysRgn = OS.ExtCreateRegion (new float [] {-1, 0, 0, 1, 0, 0}, nBytes, lpRgnData);
OS.DeleteObject (sysRgn);
sysRgn = newSysRgn;
}
}
if (OS.IsWinNT) {
POINT pt = new POINT();
OS.MapWindowPoints (0, handle, pt, 1);
OS.OffsetRgn (sysRgn, pt.x, pt.y);
}
}
}
/* Send the paint event */
int width = ps.right - ps.left;
int height = ps.bottom - ps.top;
if (width != 0 && height != 0) {
GC paintGC = null;
Image image = null;
if ((style & (SWT.DOUBLE_BUFFERED | SWT.TRANSPARENT)) != 0) {
image = new Image (display, width, height);
paintGC = gc;
gc = new GC (image, paintGC.getStyle() & SWT.RIGHT_TO_LEFT);
GCData gcData = gc.getGCData ();
gcData.uiState = data.uiState;
gc.setForeground (getForeground ());
gc.setBackground (getBackground ());
gc.setFont (getFont ());
if ((style & SWT.TRANSPARENT) != 0) {
OS.BitBlt (gc.handle, 0, 0, width, height, paintGC.handle, ps.left, ps.top, OS.SRCCOPY);
}
OS.OffsetRgn (sysRgn, -ps.left, -ps.top);
OS.SelectClipRgn (gc.handle, sysRgn);
OS.OffsetRgn (sysRgn, ps.left, ps.top);
OS.SetMetaRgn (gc.handle);
OS.SetWindowOrgEx (gc.handle, ps.left, ps.top, null);
OS.SetBrushOrgEx (gc.handle, ps.left, ps.top, null);
if ((style & (SWT.NO_BACKGROUND | SWT.TRANSPARENT)) != 0) {
/* This code is intentionally commented because it may be slow to copy bits from the screen */
//paintGC.copyArea (image, ps.left, ps.top);
} else {
RECT rect = new RECT ();
OS.SetRect (rect, ps.left, ps.top, ps.right, ps.bottom);
drawBackground (gc.handle, rect);
}
}
Event event = new Event ();
event.gc = gc;
RECT rect = null;
if ((style & SWT.NO_MERGE_PAINTS) != 0 && OS.GetRgnBox (sysRgn, rect = new RECT ()) == OS.COMPLEXREGION) {
int nBytes = OS.GetRegionData (sysRgn, 0, null);
int [] lpRgnData = new int [nBytes / 4];
OS.GetRegionData (sysRgn, nBytes, lpRgnData);
int count = lpRgnData [2];
for (int i=0; i<count; i++) {
int offset = 8 + (i << 2);
OS.SetRect (rect, lpRgnData [offset], lpRgnData [offset + 1], lpRgnData [offset + 2], lpRgnData [offset + 3]);
if ((style & (SWT.DOUBLE_BUFFERED | SWT.NO_BACKGROUND | SWT.TRANSPARENT)) == 0) {
drawBackground (gc.handle, rect);
}
event.x = rect.left;
event.y = rect.top;
event.width = rect.right - rect.left;
event.height = rect.bottom - rect.top;
event.count = count - 1 - i;
sendEvent (SWT.Paint, event);
}
} else {
if ((style & (SWT.DOUBLE_BUFFERED | SWT.NO_BACKGROUND | SWT.TRANSPARENT)) == 0) {
if (rect == null) rect = new RECT ();
OS.SetRect (rect, ps.left, ps.top, ps.right, ps.bottom);
drawBackground (gc.handle, rect);
}
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;
if ((style & (SWT.DOUBLE_BUFFERED | SWT.TRANSPARENT)) != 0) {
if (!gc.isDisposed ()) {
GCData gcData = gc.getGCData ();
if (gcData.focusDrawn && !isDisposed ()) updateUIState ();
}
gc.dispose();
if (!isDisposed ()) paintGC.drawImage (image, ps.left, ps.top);
image.dispose ();
gc = paintGC;
}
}
if (sysRgn != 0) OS.DeleteObject (sysRgn);
if (data.focusDrawn && !isDisposed ()) updateUIState ();
/* Dispose the paint GC */
gc.dispose ();
}
} else {
long /*int*/ hDC = OS.BeginPaint (handle, ps);
if ((style & (SWT.NO_BACKGROUND | SWT.TRANSPARENT)) == 0) {
RECT rect = new RECT ();
OS.SetRect (rect, ps.left, ps.top, ps.right, ps.bottom);
drawBackground (hDC, rect);
}
OS.EndPaint (handle, ps);
}
/* Restore the clipping bits */
if (!OS.IsWinCE && !isDisposed ()) {
if (newBits != oldBits) {
/*
* It is possible (but unlikely), that application
* code could have disposed the widget in the paint
* event. If this happens, don't attempt to restore
* the style.
*/
if (!isDisposed ()) {
OS.SetWindowLong (handle, OS.GWL_STYLE, oldBits);
}
}
}
return LRESULT.ZERO;
}
LRESULT WM_PRINTCLIENT (long /*int*/ wParam, long /*int*/ lParam) {
LRESULT result = super.WM_PRINTCLIENT (wParam, lParam);
if (result != null) return result;
if ((state & CANVAS) != 0) {
forceResize ();
int nSavedDC = OS.SaveDC (wParam);
RECT rect = new RECT ();
OS.GetClientRect (handle, rect);
if ((style & (SWT.NO_BACKGROUND | SWT.TRANSPARENT)) == 0) {
drawBackground (wParam, rect);
}
if (hooks (SWT.Paint) || filters (SWT.Paint)) {
GCData data = new GCData ();
data.device = display;
data.foreground = getForegroundPixel ();
Control control = findBackgroundControl ();
if (control == null) control = this;
data.background = control.getBackgroundPixel ();
data.font = Font.win32_new(display, OS.SendMessage (handle, OS.WM_GETFONT, 0, 0));
data.uiState = (int)/*64*/OS.SendMessage (handle, OS.WM_QUERYUISTATE, 0, 0);
GC gc = GC.win32_new (wParam, data);
Event event = new Event ();
event.gc = gc;
event.x = rect.left;
event.y = rect.top;
event.width = rect.right - rect.left;
event.height = rect.bottom - rect.top;
sendEvent (SWT.Paint, event);
event.gc = null;
gc.dispose ();
}
OS.RestoreDC (wParam, nSavedDC);
}
return result;
}
LRESULT WM_SETFONT (long /*int*/ wParam, long /*int*/ lParam) {
if (lParam != 0) OS.InvalidateRect (handle, null, true);
return super.WM_SETFONT (wParam, lParam);
}
LRESULT WM_SIZE (long /*int*/ wParam, long /*int*/ lParam) {
LRESULT result = null;
if ((state & RESIZE_DEFERRED) != 0) {
result = super.WM_SIZE (wParam, lParam);
} else {
/* Begin deferred window positioning */
setResizeChildren (false);
/* Resize and Layout */
result = super.WM_SIZE (wParam, lParam);
/*
* It is possible (but unlikely), that application
* code could have disposed the widget in the resize
* event. If this happens, end the processing of the
* Windows message by returning the result of the
* WM_SIZE message.
*/
if (isDisposed ()) return result;
if (layout != null) {
markLayout (false, false);
updateLayout (false, false);
}
/* End deferred window positioning */
setResizeChildren (true);
}
/* Damage the widget to cause a repaint */
if (OS.IsWindowVisible (handle)) {
if ((state & CANVAS) != 0) {
if ((style & SWT.NO_REDRAW_RESIZE) == 0) {
if (hooks (SWT.Paint)) {
OS.InvalidateRect (handle, null, true);
}
}
}
if (OS.COMCTL32_MAJOR >= 6 && OS.IsAppThemed ()) {
if (findThemeControl () != null) redrawChildren ();
}
}
/* Resize the embedded window */
if ((state & CANVAS) != 0 && (style & SWT.EMBEDDED) != 0) {
resizeEmbeddedHandle (OS.GetWindow (handle, OS.GW_CHILD), OS.LOWORD (lParam), OS.HIWORD (lParam));
}
return result;
}
LRESULT WM_SYSCOLORCHANGE (long /*int*/ wParam, long /*int*/ lParam) {
LRESULT result = super.WM_SYSCOLORCHANGE (wParam, lParam);
if (result != null) return result;
long /*int*/ hwndChild = OS.GetWindow (handle, OS.GW_CHILD);
while (hwndChild != 0) {
OS.SendMessage (hwndChild, OS.WM_SYSCOLORCHANGE, 0, 0);
hwndChild = OS.GetWindow (hwndChild, OS.GW_HWNDNEXT);
}
return result;
}
LRESULT WM_SYSCOMMAND (long /*int*/ wParam, long /*int*/ lParam) {
LRESULT result = super.WM_SYSCOMMAND (wParam, lParam);
if (result != null) return result;
/*
* Check to see if the command is a system command or
* a user menu item that was added to the system menu.
*
* NOTE: This is undocumented.
*/
if ((wParam & 0xF000) == 0) return result;
/*
* Bug in Windows. When a vertical or horizontal scroll bar is
* hidden or shown while the opposite scroll bar is being scrolled
* by the user (with WM_HSCROLL code SB_LINEDOWN), the scroll bar
* does not redraw properly. The fix is to detect this case and
* redraw the non-client area.
*/
if (!OS.IsWinCE) {
int cmd = (int)/*64*/wParam & 0xFFF0;
switch (cmd) {
case OS.SC_HSCROLL:
case OS.SC_VSCROLL:
boolean showHBar = horizontalBar != null && horizontalBar.getVisible ();
boolean showVBar = verticalBar != null && verticalBar.getVisible ();
long /*int*/ code = callWindowProc (handle, OS.WM_SYSCOMMAND, wParam, lParam);
if ((showHBar != (horizontalBar != null && horizontalBar.getVisible ())) ||
(showVBar != (verticalBar != null && verticalBar.getVisible ()))) {
int flags = OS.RDW_FRAME | OS.RDW_INVALIDATE | OS.RDW_UPDATENOW;
OS.RedrawWindow (handle, null, 0, flags);
}
if (code == 0) return LRESULT.ZERO;
return new LRESULT (code);
}
}
/* Return the result */
return result;
}
LRESULT WM_UPDATEUISTATE (long /*int*/ wParam, long /*int*/ lParam) {
LRESULT result = super.WM_UPDATEUISTATE (wParam, lParam);
if (result != null) return result;
if ((state & CANVAS) != 0 && hooks (SWT.Paint)) {
OS.InvalidateRect (handle, null, true);
}
return result;
}
LRESULT wmNCPaint (long /*int*/ hwnd, long /*int*/ wParam, long /*int*/ lParam) {
LRESULT result = super.wmNCPaint (hwnd, wParam, lParam);
if (result != null) return result;
long /*int*/ borderHandle = borderHandle ();
if ((state & CANVAS) != 0 || (hwnd == borderHandle && handle != borderHandle)) {
if (OS.COMCTL32_MAJOR >= 6 && OS.IsAppThemed ()) {
int bits1 = OS.GetWindowLong (hwnd, OS.GWL_EXSTYLE);
if ((bits1 & OS.WS_EX_CLIENTEDGE) != 0) {
long /*int*/ code = 0;
int bits2 = OS.GetWindowLong (hwnd, OS.GWL_STYLE);
if ((bits2 & (OS.WS_HSCROLL | OS.WS_VSCROLL)) != 0) {
code = callWindowProc (hwnd, OS.WM_NCPAINT, wParam, lParam);
}
long /*int*/ hDC = OS.GetWindowDC (hwnd);
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 (hDC, border, border, rect.right - border, rect.bottom - border);
OS.DrawThemeBackground (display.hEditTheme (), hDC, OS.EP_EDITTEXT, OS.ETS_NORMAL, rect, null);
OS.ReleaseDC (hwnd, hDC);
return new LRESULT (code);
}
}
}
return result;
}
LRESULT wmNotify (NMHDR hdr, long /*int*/ wParam, long /*int*/ lParam) {
if (!OS.IsWinCE) {
switch (hdr.code) {
/*
* Feature in Windows. When the tool tip control is
* created, the parent of the tool tip is the shell.
* If SetParent () is used to reparent the tool bar
* into a new shell, the tool tip is not reparented
* and pops up underneath the new shell. The fix is
* to make sure the tool tip is a topmost window.
*/
case OS.TTN_SHOW:
case OS.TTN_POP: {
/*
* Bug in Windows 98 and NT. Setting the tool tip to be the
* top most window using HWND_TOPMOST can result in a parent
* dialog shell being moved behind its parent if the dialog
* has a sibling that is currently on top. The fix is to
* lock the z-order of the active window.
*
* Feature in Windows. Using SetWindowPos() with HWND_NOTOPMOST
* to clear the topmost state of a window whose parent is already
* topmost clears the topmost state of the parent. The fix is to
* check if the parent is already on top and neither set or clear
* the topmost status of the tool tip.
*/
long /*int*/ hwndParent = hdr.hwndFrom;
do {
hwndParent = OS.GetParent (hwndParent);
if (hwndParent == 0) break;
int bits = OS.GetWindowLong (hwndParent, OS.GWL_EXSTYLE);
if ((bits & OS.WS_EX_TOPMOST) != 0) break;
} while (true);
if (hwndParent != 0) break;
display.lockActiveWindow = true;
int flags = OS.SWP_NOACTIVATE | OS.SWP_NOMOVE | OS.SWP_NOSIZE;
long /*int*/ hwndInsertAfter = hdr.code == OS.TTN_SHOW ? OS.HWND_TOPMOST : OS.HWND_NOTOPMOST;
SetWindowPos (hdr.hwndFrom, hwndInsertAfter, 0, 0, 0, 0, flags);
display.lockActiveWindow = false;
break;
}
/*
* Bug in Windows 98. For some reason, the tool bar control
* sends both TTN_GETDISPINFOW and TTN_GETDISPINFOA to get
* the tool tip text and the tab folder control sends only
* TTN_GETDISPINFOW. The fix is to handle only TTN_GETDISPINFOW,
* even though it should never be sent on Windows 98.
*
* NOTE: Because the size of NMTTDISPINFO differs between
* Windows 98 and NT, guard against the case where the wrong
* kind of message occurs by inlining the memory moves and
* the UNICODE conversion code.
*/
case OS.TTN_GETDISPINFOA:
case OS.TTN_GETDISPINFOW: {
NMTTDISPINFO lpnmtdi;
if (hdr.code == OS.TTN_GETDISPINFOA) {
lpnmtdi = new NMTTDISPINFOA ();
OS.MoveMemory ((NMTTDISPINFOA)lpnmtdi, lParam, NMTTDISPINFOA.sizeof);
} else {
lpnmtdi = new NMTTDISPINFOW ();
OS.MoveMemory ((NMTTDISPINFOW)lpnmtdi, lParam, NMTTDISPINFOW.sizeof);
}
String string = toolTipText (lpnmtdi);
if (string != null) {
Shell shell = getShell ();
string = Display.withCrLf (string);
/*
* Bug in Windows. On Windows 7, tool tips hang when displaying large
* strings. The fix is to limit the tool tip string to 4Kb.
*/
if (!OS.IsWinCE && OS.WIN32_VERSION >= OS.VERSION (6, 0)) {
if (string.length() > TOOLTIP_LIMIT) {
string = string.substring(0, TOOLTIP_LIMIT);
}
}
char [] chars = fixMnemonic (string);
/*
* Ensure that the orientation of the tool tip matches
* the orientation of the control.
*/
Widget widget = null;
long /*int*/ hwnd = hdr.idFrom;
if ((lpnmtdi.uFlags & OS.TTF_IDISHWND) != 0) {
widget = display.getControl (hwnd);
} else {
if (hdr.hwndFrom == shell.toolTipHandle || hdr.hwndFrom == shell.balloonTipHandle) {
widget = shell.findToolTip ((int)/*64*/hdr.idFrom);
}
}
if (widget != null) {
int style = widget.getStyle();
int flags = SWT.RIGHT_TO_LEFT | SWT.FLIP_TEXT_DIRECTION;
if ((style & flags) != 0 && (style & flags) != flags) {
lpnmtdi.uFlags |= OS.TTF_RTLREADING;
} else {
lpnmtdi.uFlags &= ~OS.TTF_RTLREADING;
}
}
if (hdr.code == OS.TTN_GETDISPINFOA) {
byte [] bytes = new byte [chars.length * 2];
OS.WideCharToMultiByte (getCodePage (), 0, chars, chars.length, bytes, bytes.length, null, null);
shell.setToolTipText (lpnmtdi, bytes);
OS.MoveMemory (lParam, (NMTTDISPINFOA)lpnmtdi, NMTTDISPINFOA.sizeof);
} else {
shell.setToolTipText (lpnmtdi, chars);
OS.MoveMemory (lParam, (NMTTDISPINFOW)lpnmtdi, NMTTDISPINFOW.sizeof);
}
return LRESULT.ZERO;
}
break;
}
}
}
return super.wmNotify (hdr, wParam, lParam);
}
}