/*******************************************************************************
* Copyright (c) 2000, 2011 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.internal.photon.*;
import org.eclipse.swt.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.events.*;
/**
* Instances of the receiver represent a selectable user interface object
* that allows the user to drag a rubber banded outline of the sash within
* the parent control.
* <dl>
* <dt><b>Styles:</b></dt>
* <dd>HORIZONTAL, VERTICAL, SMOOTH</dd>
* <dt><b>Events:</b></dt>
* <dd>Selection</dd>
* </dl>
* <p>
* Note: Only one of the styles HORIZONTAL and VERTICAL may be specified.
* </p><p>
* IMPORTANT: This class is <em>not</em> intended to be subclassed.
* </p>
*
* @see <a href="http://www.eclipse.org/swt/snippets/#sash">Sash snippets</a>
* @see <a href="http://www.eclipse.org/swt/examples.php">SWT Example: ControlExample</a>
* @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
* @noextend This class is not intended to be subclassed by clients.
*/
public class Sash extends Control {
boolean dragging;
int startX, startY, lastX, lastY;
final static int INCREMENT = 1;
final static int PAGE_INCREMENT = 9;
/**
* 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 composite control which will be the parent of the new instance (cannot be null)
* @param style the style of control 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>
* <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li>
* </ul>
*
* @see SWT#HORIZONTAL
* @see SWT#VERTICAL
* @see SWT#SMOOTH
* @see Widget#checkSubclass
* @see Widget#getStyle
*/
public Sash (Composite parent, int style) {
super (parent, checkStyle (style));
}
/**
* Adds the listener to the collection of listeners who will
* be notified when the control is selected by the user, by sending
* it one of the messages defined in the <code>SelectionListener</code>
* interface.
* <p>
* When <code>widgetSelected</code> is called, the x, y, width, and height fields of the event object are valid.
* If the receiver is being dragged, the event object detail field contains the value <code>SWT.DRAG</code>.
* <code>widgetDefaultSelected</code> is not called.
* </p>
*
* @param listener the listener which should be notified when the control is selected by the user
*
* @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 SelectionListener
* @see #removeSelectionListener
* @see SelectionEvent
*/
public void addSelectionListener (SelectionListener listener) {
checkWidget();
if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
TypedListener typedListener = new TypedListener (listener);
addListener (SWT.Selection,typedListener);
addListener (SWT.DefaultSelection,typedListener);
}
static int checkStyle (int style) {
return checkBits (style, SWT.HORIZONTAL, SWT.VERTICAL, 0, 0, 0, 0);
}
public Point computeSize (int wHint, int hHint, boolean changed) {
checkWidget();
int border = getBorderWidth ();
int width = border * 2, height = border * 2;
if ((style & SWT.HORIZONTAL) != 0) {
width += DEFAULT_WIDTH; height += 3;
} else {
width += 3; height += DEFAULT_HEIGHT;
}
if (wHint != SWT.DEFAULT) width = wHint + (border * 2);
if (hHint != SWT.DEFAULT) height = hHint + (border * 2);
return new Point (width, height);
}
void createHandle (int index) {
state |= GRAB | HANDLE;
int clazz = display.PtContainer;
int parentHandle = parent.parentingHandle ();
int cursor = ((style & SWT.HORIZONTAL) != 0) ? OS.Ph_CURSOR_DRAG_VERTICAL : OS.Ph_CURSOR_DRAG_HORIZONTAL;
int [] args = {
OS.Pt_ARG_FLAGS, 0, OS.Pt_GETS_FOCUS,
OS.Pt_ARG_CURSOR_TYPE, cursor, 0,
OS.Pt_ARG_RESIZE_FLAGS, 0, OS.Pt_RESIZE_XY_BITS,
};
handle = OS.PtCreateWidget (clazz, parentHandle, args.length / 3, args);
if (handle == 0) error (SWT.ERROR_NO_HANDLES);
}
byte [] defaultFont () {
return display.TITLE_FONT;
}
void drawBand (int x, int y, int width, int height) {
if (parent == null) return;
if (parent.isDisposed ()) return;
int parentHandle = parent.handle;
if (!OS.PtWidgetIsRealized (parentHandle)) return;
int phGC = OS.PgCreateGC (0); // NOTE: PgCreateGC ignores the parameter
if (phGC == 0) return;
int [] args = {OS.Pt_ARG_COLOR, 0, 0, OS.Pt_ARG_FILL_COLOR, 0, 0};
OS.PtGetResources (handle, args.length / 3, args);
int foreground = args [1];
int background = args [4];
int color = foreground ^ ~background;
int prevContext = OS.PgSetGC (phGC);
int disjoint = OS.PtFindDisjoint( handle );
if( disjoint != 0 )
OS.PgSetRegion( OS.PtWidgetRid( disjoint ) );
PhPoint_t pt = new PhPoint_t ();
// PhRect_t tran_rect = new PhRect_t();
if (parentHandle <= 0) return;
OS.PtWidgetOffset(parentHandle, pt);
OS.PgSetTranslation(pt,0);
OS.PgSetDrawMode (OS.Pg_DrawModeDSx);
OS.PgSetFillColor (color);
OS.PgDrawIRect (x, y, x + width - 1, y + height - 1, OS.Pg_DRAW_FILL);
OS.PgSetGC (prevContext);
OS.PgDestroyGC (phGC);
}
int Ph_EV_BUT_PRESS (int widget, int info) {
int result = super.Ph_EV_BUT_PRESS (widget, info);
if (result != OS.Pt_CONTINUE)return result;
processMouse (info);
return result;
}
int Ph_EV_BUT_RELEASE (int widget, int info) {
int result = super.Ph_EV_BUT_RELEASE (widget, info);
if (result != OS.Pt_CONTINUE)return result;
processMouse (info);
return result;
}
int Ph_EV_DRAG (int widget, int info) {
int result = super.Ph_EV_DRAG (widget, info);
if (result != OS.Pt_CONTINUE)return result;
processMouse (info);
return result;
}
int Ph_EV_PTR_MOTION (int widget, int info) {
int result = super.Ph_EV_PTR_MOTION (widget, info);
if (result != OS.Pt_CONTINUE)return result;
processMouse (info);
return result;
}
void processMouse (int info) {
PtCallbackInfo_t cbinfo = new PtCallbackInfo_t ();
OS.memmove (cbinfo, info, PtCallbackInfo_t.sizeof);
PhEvent_t ev = new PhEvent_t ();
OS.memmove (ev, cbinfo.event, PhEvent_t.sizeof);
int data = OS.PhGetData (cbinfo.event);
PhPointerEvent_t pe = new PhPointerEvent_t ();
OS.memmove (pe, data, PhPointerEvent_t.sizeof);
if (pe.buttons != OS.Ph_BUTTON_SELECT) return;
int x = pe.pos_x + ev.translation_x;
int y = pe.pos_y + ev.translation_y;
PhArea_t area = new PhArea_t ();
OS.PtWidgetArea (handle, area);
Event event = new Event ();
int width = event.width = area.size_w;
int height = event.height = area.size_h;
switch (ev.type) {
case OS.Ph_EV_BUT_PRESS:
PhRect_t rect = new PhRect_t ();
PhPoint_t pos = new PhPoint_t();
pos.x = pe.pos_x;
pos.y = pe.pos_y;
rect.ul_x = rect.lr_x = (short) (pos.x + ev.translation_x);
rect.ul_y = rect.lr_y = (short) (pos.y + ev.translation_y);
int rid = OS.PtWidgetRid (handle);
// int input_group = OS.PhInputGroup (cbinfo.event);
int input_group = OS.PhInputGroup (0);
OS.PhInitDrag (rid, OS.Ph_DRAG_KEY_MOTION | OS.Ph_DRAG_TRACK | OS.Ph_TRACK_DRAG, rect, null, input_group, null, null, null, pos, null);
/* Compute the banding rectangle */
startX = x;
startY = y;
lastX = area.pos_x;
lastY = area.pos_y;
/* The event must be sent because doit flag is used */
event.x = lastX; event.y = lastY;
event.detail = SWT.DRAG;
/*
* It is possible (but unlikely), that application
* code could have disposed the widget in the selection
* event. If this happens, end the processing of the
* Windows message by returning zero as the result of
* the window proc.
*/
sendEvent (SWT.Selection, event);
if (isDisposed ()) return;
/* Draw the banding rectangle */
if (event.doit) {
dragging = true;
menuShell ().bringToTop (true);
OS.PtFlush ();
drawBand (lastX = event.x, lastY = event.y, width, height);
}
break;
case OS.Ph_EV_BUT_RELEASE:
if (ev.subtype != OS.Ph_EV_RELEASE_PHANTOM) {
return;
}
/* Compute the banding rectangle */
if (!dragging) return;
dragging = false;
/* The event must be sent because doit flag is used */
event.x = lastX; event.y = lastY;
drawBand (lastX, lastY, width, height);
sendEvent (SWT.Selection, event);
// widget could be disposed at this point
break;
case OS.Ph_EV_PTR_MOTION_BUTTON:
case OS.Ph_EV_PTR_MOTION_NOBUTTON:
case OS.Ph_EV_DRAG:
if (ev.subtype != OS.Ph_EV_DRAG_MOTION_EVENT) {
return;
}
if (!dragging) return;
/* Compute the banding rectangle */
x += area.pos_x;
y += area.pos_y;
Rectangle r = parent.getClientArea ();
int clientWidth = r.width;
int clientHeight = r.height;
int newX = lastX, newY = lastY;
if ((style & SWT.VERTICAL) != 0) {
newX = Math.min (Math.max (0, x - startX), clientWidth - width);
} else {
newY = Math.min (Math.max (0, y - startY), clientHeight - height);
}
if ((newX == lastX) && (newY == lastY)) return;
drawBand (lastX, lastY, width, height);
/* The event must be sent because doit flag is used */
event.x = newX; event.y = newY;
event.detail = SWT.DRAG;
/*
* It is possible (but unlikely), that application
* code could have disposed the widget in the selection
* event. If this happens, end the processing of the
* Windows message by returning zero as the result of
* the window proc.
*/
sendEvent (SWT.Selection, event);
if (isDisposed ()) return;
/* Draw the banding rectangle */
if (event.doit) {
lastX = event.x; lastY = event.y;
OS.PtFlush ();
drawBand (lastX, lastY, width, height);
}
break;
}
}
/**
* Removes the listener from the collection of listeners who will
* be notified when the control is selected by the user.
*
* @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 SelectionListener
* @see #addSelectionListener
*/
public void removeSelectionListener(SelectionListener listener) {
checkWidget();
if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
if (eventTable == null) return;
eventTable.unhook (SWT.Selection, listener);
eventTable.unhook (SWT.DefaultSelection,listener);
}
int traversalCode (int key_sym, PhKeyEvent_t ke) {
return 0;
}
boolean translateTraversal (int key_sym, PhKeyEvent_t phEvent) {
boolean result = super.translateTraversal (key_sym, phEvent);
if (!result) {
switch (key_sym) {
case OS.Pk_Left:
case OS.Pk_Right:
case OS.Pk_Up:
case OS.Pk_Down:
/* Calculate the new x or y position */
if ((phEvent.button_state & OS.Ph_BUTTON_SELECT) != 0) return result;
int step = (phEvent.key_mods & OS.Pk_KM_Ctrl) != 0 ? INCREMENT : PAGE_INCREMENT;
int x = 0, y = 0;
if ((style & SWT.VERTICAL) != 0) {
if (key_sym == OS.Pk_Up || key_sym == OS.Pk_Down) break;
x = key_sym == OS.Pk_Left ? -step : step;
} else {
if (key_sym == OS.Pk_Left || key_sym == OS.Pk_Right) break;
y = key_sym == OS.Pk_Up ? -step : step;
}
PhArea_t area = new PhArea_t ();
OS.PtWidgetArea (handle, area);
x += area.pos_x;
y += area.pos_y;
int width = area.size_w;
int height = area.size_h;
Rectangle r = parent.getClientArea ();
int clientWidth = r.width;
int clientHeight = r.height;
int newX = lastX, newY = lastY;
if ((style & SWT.VERTICAL) != 0) {
newX = Math.min (Math.max (0, x - startX), clientWidth - width);
} else {
newY = Math.min (Math.max (0, y - startY), clientHeight - height);
}
if (newX == lastX && newY == lastY) return result;
/* The event must be sent because doit flag is used */
Event event = new Event ();
event.x = newX; event.y = newY;
event.width = width; event.height = height;
/*
* It is possible (but unlikely), that application
* code could have disposed the widget in the selection
* event. If this happens, end the processing of the
* Windows message by returning zero as the result of
* the window proc.
*/
sendEvent (SWT.Selection, event);
if (isDisposed ()) return true;
if (event.doit) {
OS.PtWidgetArea (handle, area);
int cursorX = area.size_w / 2, cursorY = area.size_h / 2;
short [] absX = new short [1], absY = new short [1];
OS.PtGetAbsPosition (handle, absX, absY);
OS.PhMoveCursorAbs (OS.PhInputGroup (0), cursorX + absX [0], cursorY + absY [0]);
}
return result;
}
}
return result;
}
int widgetClass () {
return OS.PtContainer ();
}
}