bundles/org.eclipse.swt/Eclipse SWT/photon/org/eclipse/swt/widgets/Sash.java - platform/eclipse.platform.swt - Git at Google

 /*******************************************************************************
  * 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 ();
 }

 }
	/*******************************************************************************
	* 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 ();
	}

	}