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

 package org.eclipse.swt.widgets;

 /*
  * Copyright (c) 2000, 2002 IBM Corp.  All rights reserved.
  * This file is made available under the terms of the Common Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/cpl-v10.html
  */

 import org.eclipse.swt.*;
 import org.eclipse.swt.internal.*;
 import org.eclipse.swt.internal.gtk.*;
 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</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 intended to be subclassed <em>only</em>
  * within the SWT implementation.
  * </p>
  */
 public class Sash extends Control {
 	boolean dragging;
 	int startX, startY, lastX, lastY;
 	int cursor;

 /**
  * 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 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 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 reciever 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
  *
  * @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 |= HANDLE;
 	handle = OS.gtk_drawing_area_new ();
 	if (handle == 0) error (SWT.ERROR_NO_HANDLES);
 	int parentHandle = parent.parentingHandle ();
 	OS.gtk_container_add (parentHandle, handle);
 	OS.gtk_widget_show (handle);
 	int type = (style & SWT.VERTICAL) != 0 ? OS.GDK_SB_H_DOUBLE_ARROW : OS.GDK_SB_V_DOUBLE_ARROW;
 	cursor = OS.gdk_cursor_new (type);
 	OS.gtk_widget_realize (handle);
 	int window = OS.GTK_WIDGET_WINDOW (handle);
 	OS.gdk_window_set_cursor (window, cursor);
 }

 void drawBand (int x, int y, int width, int height) {
 	int window = OS.GTK_WIDGET_WINDOW (parent.paintHandle());
 	if (window == 0) return;
 	byte [] bits = {-86, 0, 85, 0, -86, 0, 85, 0, -86, 0, 85, 0, -86, 0, 85, 0};
 	int stipplePixmap = OS.gdk_bitmap_create_from_data (window, bits, 8, 8);
 	int gc = OS.gdk_gc_new (window);
 	int colormap = OS.gdk_colormap_get_system();
 	GdkColor color = new GdkColor ();
 	OS.gdk_color_white (colormap, color);
 	OS.gdk_gc_set_foreground (gc, color);
 	OS.gdk_gc_set_stipple (gc, stipplePixmap);
 	OS.gdk_gc_set_subwindow (gc, OS.GDK_INCLUDE_INFERIORS);
 	OS.gdk_gc_set_fill (gc, OS.GDK_STIPPLED);
 	OS.gdk_gc_set_function (gc, OS.GDK_XOR);
 	OS.gdk_draw_rectangle (window, gc, 1, x, y, width, height);
 	OS.g_object_unref (stipplePixmap);
 	OS.g_object_unref (gc);
 }

 int processMouseDown (int callData, int int1, int int2) {
 	super.processMouseDown (callData, int1, int2);
 	GdkEventButton gdkEvent = new GdkEventButton ();
 	OS.memmove (gdkEvent, callData, GdkEventButton.sizeof);
 	int button = gdkEvent.button;
 	if (button != 1) return 0;
 	double[] px = new double [1], py = new double [1];
 	OS.gdk_event_get_coords (callData, px, py);
 	startX = (int)px [0];  startY = (int) py [0];
 	int border = 0;
 	int x = OS.GTK_WIDGET_X (handle);
 	int y = OS.GTK_WIDGET_Y (handle);
 	int width = OS.GTK_WIDGET_WIDTH (handle);
 	int height = OS.GTK_WIDGET_HEIGHT (handle);
 	lastX = x - border;  lastY = y - border;
 	/* The event must be sent because its doit flag is used. */
 	Event event = new Event ();
 	event.detail = SWT.DRAG;
 	event.time = OS.gdk_event_get_time (callData);
 	event.x = lastX;  event.y = lastY;
 	event.width = width;  event.height = height;
 	/*
 	 * It is possible (but unlikely) that client code could have disposed
 	 * the widget in the selection event.  If this happens end the processing
 	 * of this message by returning.
 	 */
 	sendEvent (SWT.Selection, event);
 	if (isDisposed ()) return 0;
 	if (event.doit) {
 		dragging = true;
 //		OS.XmUpdateDisplay (handle);
 		drawBand (lastX = event.x, lastY = event.y, width, height);
 	}
 	return 0;
 }

 int processMouseMove (int callData, int int1, int int2) {
 	super.processMouseMove (callData, int1, int2);
 	int [] state = new int [1];
 	OS.gdk_event_get_state (callData, state);
 	if (!dragging || (state [0] & OS.GDK_BUTTON1_MASK) == 0) return 0;
 	int x = OS.GTK_WIDGET_X (handle);
 	int y = OS.GTK_WIDGET_Y (handle);
 	int width = OS.GTK_WIDGET_WIDTH (handle);
 	int height = OS.GTK_WIDGET_HEIGHT (handle);
 	int border = 0, parentBorder = 0;
 	int parentWidth = OS.GTK_WIDGET_WIDTH (parent.handle);
 	int parentHeight = OS.GTK_WIDGET_WIDTH (parent.handle);
 	double[] px = new double [1], py = new double [1];
 	OS.gdk_event_get_coords (callData, px, py);
 	int newX = lastX, newY = lastY;
 	if ((style & SWT.VERTICAL) != 0) {
 		newX = Math.min (Math.max (0, (int)px [0] + x - startX - parentBorder), parentWidth - width);
 	} else {
 		newY = Math.min (Math.max (0, (int)py[0] + y - startY - parentBorder), parentHeight - height);
 	}
 	if (newX == lastX && newY == lastY) return 0;
 	drawBand (lastX, lastY, width, height);
 	/* The event must be sent because its doit flag is used. */
 	Event event = new Event ();
 	event.detail = SWT.DRAG;
 	event.time = OS.gdk_event_get_time (callData);
 	event.x = newX;  event.y = newY;
 	event.width = width;  event.height = height;
 	/*
 	 * It is possible (but unlikely) that client code could have disposed
 	 * the widget in the selection event.  If this happens end the processing
 	 * of this message by returning.
 	 */
 	sendEvent (SWT.Selection, event);
 	if (isDisposed ()) return 0;
 	if (event.doit) {
 		lastX = event.x;  lastY = event.y;
 //		OS.XmUpdateDisplay (handle);
 		drawBand (lastX, lastY, width, height);
 	}
 	return 0;
 }

 int processMouseUp (int callData, int int1, int int2) {
 	super.processMouseUp (callData, int1, int2);
 	GdkEventButton gdkEvent = new GdkEventButton ();
 	OS.memmove (gdkEvent, callData, GdkEventButton.sizeof);
 	int button = gdkEvent.button;
 	if (button != 1) return 0;
 	if (!dragging) return 0;
 	dragging = false;
 	int width = OS.GTK_WIDGET_WIDTH (handle);
 	int height = OS.GTK_WIDGET_HEIGHT (handle);
 	/* The event must be sent because its doit flag is used. */
 	Event event = new Event ();
 	event.time = OS.gdk_event_get_time (callData);
 	event.x = lastX;  event.y = lastY;
 	event.width = width;  event.height = height;
 	drawBand (lastX, lastY, width, height);
 	sendEvent (SWT.Selection, event);
 	/* widget could be disposed here */
 	return 0;
 }

 void releaseWidget () {
 	super.releaseWidget ();
 	if (cursor != 0) OS.gdk_cursor_destroy (cursor);
 	cursor = 0;
 }

 /**
  * Removes the listener from the collection of listeners who will
  * be notified when the control is selected.
  *
  * @param listener the listener which should 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);
 }

 }
	package org.eclipse.swt.widgets;

	/*
	* Copyright (c) 2000, 2002 IBM Corp. All rights reserved.
	* This file is made available under the terms of the Common Public License v1.0
	* which accompanies this distribution, and is available at
	* http://www.eclipse.org/legal/cpl-v10.html
	*/

	import org.eclipse.swt.*;
	import org.eclipse.swt.internal.*;
	import org.eclipse.swt.internal.gtk.*;
	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</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 intended to be subclassed <em>only</em>
	* within the SWT implementation.
	* </p>
	*/
	public class Sash extends Control {
	boolean dragging;
	int startX, startY, lastX, lastY;
	int cursor;

	/**
	* 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 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 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 reciever 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
	*
	* @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 \|= HANDLE;
	handle = OS.gtk_drawing_area_new ();
	if (handle == 0) error (SWT.ERROR_NO_HANDLES);
	int parentHandle = parent.parentingHandle ();
	OS.gtk_container_add (parentHandle, handle);
	OS.gtk_widget_show (handle);
	int type = (style & SWT.VERTICAL) != 0 ? OS.GDK_SB_H_DOUBLE_ARROW : OS.GDK_SB_V_DOUBLE_ARROW;
	cursor = OS.gdk_cursor_new (type);
	OS.gtk_widget_realize (handle);
	int window = OS.GTK_WIDGET_WINDOW (handle);
	OS.gdk_window_set_cursor (window, cursor);
	}

	void drawBand (int x, int y, int width, int height) {
	int window = OS.GTK_WIDGET_WINDOW (parent.paintHandle());
	if (window == 0) return;
	byte [] bits = {-86, 0, 85, 0, -86, 0, 85, 0, -86, 0, 85, 0, -86, 0, 85, 0};
	int stipplePixmap = OS.gdk_bitmap_create_from_data (window, bits, 8, 8);
	int gc = OS.gdk_gc_new (window);
	int colormap = OS.gdk_colormap_get_system();
	GdkColor color = new GdkColor ();
	OS.gdk_color_white (colormap, color);
	OS.gdk_gc_set_foreground (gc, color);
	OS.gdk_gc_set_stipple (gc, stipplePixmap);
	OS.gdk_gc_set_subwindow (gc, OS.GDK_INCLUDE_INFERIORS);
	OS.gdk_gc_set_fill (gc, OS.GDK_STIPPLED);
	OS.gdk_gc_set_function (gc, OS.GDK_XOR);
	OS.gdk_draw_rectangle (window, gc, 1, x, y, width, height);
	OS.g_object_unref (stipplePixmap);
	OS.g_object_unref (gc);
	}

	int processMouseDown (int callData, int int1, int int2) {
	super.processMouseDown (callData, int1, int2);
	GdkEventButton gdkEvent = new GdkEventButton ();
	OS.memmove (gdkEvent, callData, GdkEventButton.sizeof);
	int button = gdkEvent.button;
	if (button != 1) return 0;
	double[] px = new double [1], py = new double [1];
	OS.gdk_event_get_coords (callData, px, py);
	startX = (int)px [0]; startY = (int) py [0];
	int border = 0;
	int x = OS.GTK_WIDGET_X (handle);
	int y = OS.GTK_WIDGET_Y (handle);
	int width = OS.GTK_WIDGET_WIDTH (handle);
	int height = OS.GTK_WIDGET_HEIGHT (handle);
	lastX = x - border; lastY = y - border;
	/* The event must be sent because its doit flag is used. */
	Event event = new Event ();
	event.detail = SWT.DRAG;
	event.time = OS.gdk_event_get_time (callData);
	event.x = lastX; event.y = lastY;
	event.width = width; event.height = height;
	/*
	* It is possible (but unlikely) that client code could have disposed
	* the widget in the selection event. If this happens end the processing
	* of this message by returning.
	*/
	sendEvent (SWT.Selection, event);
	if (isDisposed ()) return 0;
	if (event.doit) {
	dragging = true;
	// OS.XmUpdateDisplay (handle);
	drawBand (lastX = event.x, lastY = event.y, width, height);
	}
	return 0;
	}

	int processMouseMove (int callData, int int1, int int2) {
	super.processMouseMove (callData, int1, int2);
	int [] state = new int [1];
	OS.gdk_event_get_state (callData, state);
	if (!dragging \|\| (state [0] & OS.GDK_BUTTON1_MASK) == 0) return 0;
	int x = OS.GTK_WIDGET_X (handle);
	int y = OS.GTK_WIDGET_Y (handle);
	int width = OS.GTK_WIDGET_WIDTH (handle);
	int height = OS.GTK_WIDGET_HEIGHT (handle);
	int border = 0, parentBorder = 0;
	int parentWidth = OS.GTK_WIDGET_WIDTH (parent.handle);
	int parentHeight = OS.GTK_WIDGET_WIDTH (parent.handle);
	double[] px = new double [1], py = new double [1];
	OS.gdk_event_get_coords (callData, px, py);
	int newX = lastX, newY = lastY;
	if ((style & SWT.VERTICAL) != 0) {
	newX = Math.min (Math.max (0, (int)px [0] + x - startX - parentBorder), parentWidth - width);
	} else {
	newY = Math.min (Math.max (0, (int)py[0] + y - startY - parentBorder), parentHeight - height);
	}
	if (newX == lastX && newY == lastY) return 0;
	drawBand (lastX, lastY, width, height);
	/* The event must be sent because its doit flag is used. */
	Event event = new Event ();
	event.detail = SWT.DRAG;
	event.time = OS.gdk_event_get_time (callData);
	event.x = newX; event.y = newY;
	event.width = width; event.height = height;
	/*
	* It is possible (but unlikely) that client code could have disposed
	* the widget in the selection event. If this happens end the processing
	* of this message by returning.
	*/
	sendEvent (SWT.Selection, event);
	if (isDisposed ()) return 0;
	if (event.doit) {
	lastX = event.x; lastY = event.y;
	// OS.XmUpdateDisplay (handle);
	drawBand (lastX, lastY, width, height);
	}
	return 0;
	}

	int processMouseUp (int callData, int int1, int int2) {
	super.processMouseUp (callData, int1, int2);
	GdkEventButton gdkEvent = new GdkEventButton ();
	OS.memmove (gdkEvent, callData, GdkEventButton.sizeof);
	int button = gdkEvent.button;
	if (button != 1) return 0;
	if (!dragging) return 0;
	dragging = false;
	int width = OS.GTK_WIDGET_WIDTH (handle);
	int height = OS.GTK_WIDGET_HEIGHT (handle);
	/* The event must be sent because its doit flag is used. */
	Event event = new Event ();
	event.time = OS.gdk_event_get_time (callData);
	event.x = lastX; event.y = lastY;
	event.width = width; event.height = height;
	drawBand (lastX, lastY, width, height);
	sendEvent (SWT.Selection, event);
	/* widget could be disposed here */
	return 0;
	}

	void releaseWidget () {
	super.releaseWidget ();
	if (cursor != 0) OS.gdk_cursor_destroy (cursor);
	cursor = 0;
	}

	/**
	* Removes the listener from the collection of listeners who will
	* be notified when the control is selected.
	*
	* @param listener the listener which should 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);
	}

	}