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

 package org.eclipse.swt.widgets;

 /*
  * (c) Copyright IBM Corp. 2000, 2001.
  * All Rights Reserved
  */

 import org.eclipse.swt.internal.motif.*;
 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</dd>
  * <dt><b>Events:</b></dt>
  * <dd>Selection</dd>
  * </dl>
  * <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
  * for all SWT widget classes should include a comment which
  * describes the style constants which are applicable to the class.
  * </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
  * @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;
 	int border = (style & SWT.BORDER) != 0 ? 1 : 0;
 	int [] argList = {
 		OS.XmNborderWidth, border,
 		OS.XmNmarginWidth, 0,
 		OS.XmNmarginHeight, 0,
 		OS.XmNresizePolicy, OS.XmRESIZE_NONE,
 		OS.XmNancestorSensitive, 1,
 		OS.XmNtraversalOn, 0,
 	};
 	int parentHandle = parent.handle;
 	handle = OS.XmCreateDrawingArea (parentHandle, null, argList, argList.length / 2);
 }
 void drawBand (int x, int y, int width, int height) {
 	int display = OS.XtDisplay (parent.handle);
 	if (display == 0) return;
 	int window = OS.XtWindow (parent.handle);
 	if (window == 0) return;
 	int [] argList = {OS.XmNforeground, 0, OS.XmNbackground, 0};
 	OS.XtGetValues (parent.handle, argList, argList.length / 2);
 	int color = argList [1] ^ argList [3];
 	byte [] bits = {-86, 0, 85, 0, -86, 0, 85, 0, -86, 0, 85, 0, -86, 0, 85, 0};
 	int stipplePixmap = OS.XCreateBitmapFromData (display, window, bits, 8, 8);
 	int gc = OS.XCreateGC (display, window, 0, null);
 	OS.XSetForeground (display, gc, color);
 	OS.XSetStipple (display, gc, stipplePixmap);
 	OS.XSetSubwindowMode (display, gc, OS.IncludeInferiors);
 	OS.XSetFillStyle (display, gc, OS.FillStippled);
 	OS.XSetFunction (display, gc, OS.GXxor);
 	OS.XFillRectangle (display, window, gc, x, y, width, height);
 	OS.XFreePixmap (display, stipplePixmap);
 	OS.XFreeGC (display, gc);
 }
 int processMouseDown (int callData) {
 	super.processMouseDown (callData);
 	XButtonEvent xEvent = new XButtonEvent ();
 	OS.memmove (xEvent, callData, XButtonEvent.sizeof);
 	if (xEvent.button != 1) return 0;
 	startX = xEvent.x;  startY = xEvent.y;
 	int [] argList = {OS.XmNx, 0, OS.XmNy, 0, OS.XmNwidth, 0, OS.XmNheight, 0, OS.XmNborderWidth, 0};
 	OS.XtGetValues (handle, argList, argList.length / 2);
 	int border = argList [9], width = argList [5] + (border * 2), height = argList [7] + (border * 2);
 	lastX = ((short) argList [1]) - border;  lastY = ((short) argList [3]) - border;
 	Event event = new Event ();
 	event.detail = SWT.DRAG;
 	event.time = xEvent.time;
 	event.x = lastX;  event.y = lastY;
 	event.width = width;  event.height = height;
 	sendEvent (SWT.Selection, event);
 	if (event.doit) {
 		dragging = true;
 		OS.XmUpdateDisplay (handle);
 		drawBand (lastX = event.x, lastY = event.y, width, height);
 	}
 	return 0;
 }
 int processMouseMove (int callData) {
 	super.processMouseMove (callData);
 	XMotionEvent xEvent = new XMotionEvent ();
 	OS.memmove (xEvent, callData, XMotionEvent.sizeof);
 	if (!dragging || (xEvent.state & OS.Button1Mask) == 0) return 0;
 	int [] argList1 = {OS.XmNx, 0, OS.XmNy, 0, OS.XmNwidth, 0, OS.XmNheight, 0, OS.XmNborderWidth, 0};
 	OS.XtGetValues (handle, argList1, argList1.length / 2);
 	int border = argList1 [9], x = ((short) argList1 [1]) - border, y = ((short) argList1 [3]) - border;
 	int width = argList1 [5] + (border * 2), height = argList1 [7] + (border * 2);
 	int [] argList2 = {OS.XmNwidth, 0, OS.XmNheight, 0, OS.XmNborderWidth, 0};
 	OS.XtGetValues (parent.handle, argList2, argList2.length / 2);
 	int parentBorder = argList2 [5];
 	int parentWidth = argList2 [1] + (parentBorder * 2);
 	int parentHeight = argList2 [3] + (parentBorder * 2);
 	int newX = lastX, newY = lastY;
 	if ((style & SWT.VERTICAL) != 0) {
 		newX = Math.min (Math.max (0, xEvent.x + x - startX - parentBorder), parentWidth - width);
 	} else {
 		newY = Math.min (Math.max (0, xEvent.y + y - startY - parentBorder), parentHeight - height);
 	}
 	if (newX == lastX && newY == lastY) return 0;
 	drawBand (lastX, lastY, width, height);
 	Event event = new Event ();
 	event.detail = SWT.DRAG;
 	event.time = xEvent.time;
 	event.x = newX;  event.y = newY;
 	event.width = width;  event.height = height;
 	sendEvent (SWT.Selection, event);
 	if (event.doit) {
 		lastX = event.x;  lastY = event.y;
 		OS.XmUpdateDisplay (handle);
 		drawBand (lastX, lastY, width, height);
 	}
 	return 0;
 }
 int processMouseUp (int callData) {
 	super.processMouseUp (callData);
 	XButtonEvent xEvent = new XButtonEvent ();
 	OS.memmove (xEvent, callData, XButtonEvent.sizeof);
 	if (xEvent.button != 1) return 0;
 	if (!dragging) return 0;
 	dragging = false;
 	int [] argList = {OS.XmNwidth, 0, OS.XmNheight, 0, OS.XmNborderWidth, 0};
 	OS.XtGetValues (handle, argList, argList.length / 2);
 	int border = argList [5];
 	int width = argList [1] + (border * 2), height = argList [3] + (border * 2);
 	Event event = new Event ();
 	event.time = xEvent.time;
 	event.x = lastX;  event.y = lastY;
 	event.width = width;  event.height = height;
 	drawBand (lastX, lastY, width, height);
 	sendEvent (SWT.Selection, event);
 	return 0;
 }
 void propagateWidget (boolean enabled) {
 	propagateHandle (enabled, handle);
 	/*
 	* Sashes do not participate in focus traversal.
 	*/
 	if (enabled) {
 		int [] argList = {OS.XmNtraversalOn, 0};
 		OS.XtSetValues (handle, argList, argList.length / 2);
 	}
 }
 void realizeChildren () {
 	super.realizeChildren ();
 	int window = OS.XtWindow (handle);
 	if (window == 0) return;
 	int display = OS.XtDisplay (handle);
 	if (display == 0) return;
 	if ((style & SWT.HORIZONTAL) != 0) {
 		cursor = OS.XCreateFontCursor (display, OS.XC_sb_v_double_arrow);
 	} else {
 		cursor = OS.XCreateFontCursor (display, OS.XC_sb_h_double_arrow);
 	}
 	OS.XDefineCursor (display, window, cursor);
 }
 void releaseWidget () {
 	super.releaseWidget ();
 	if (cursor != 0) {
 		int display = OS.XtDisplay (handle);
 		if (display != 0) OS.XFreeCursor (display, 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;

	/*
	* (c) Copyright IBM Corp. 2000, 2001.
	* All Rights Reserved
	*/

	import org.eclipse.swt.internal.motif.*;
	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</dd>
	* <dt><b>Events:</b></dt>
	* <dd>Selection</dd>
	* </dl>
	* <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
	* for all SWT widget classes should include a comment which
	* describes the style constants which are applicable to the class.
	* </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
	* @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;
	int border = (style & SWT.BORDER) != 0 ? 1 : 0;
	int [] argList = {
	OS.XmNborderWidth, border,
	OS.XmNmarginWidth, 0,
	OS.XmNmarginHeight, 0,
	OS.XmNresizePolicy, OS.XmRESIZE_NONE,
	OS.XmNancestorSensitive, 1,
	OS.XmNtraversalOn, 0,
	};
	int parentHandle = parent.handle;
	handle = OS.XmCreateDrawingArea (parentHandle, null, argList, argList.length / 2);
	}
	void drawBand (int x, int y, int width, int height) {
	int display = OS.XtDisplay (parent.handle);
	if (display == 0) return;
	int window = OS.XtWindow (parent.handle);
	if (window == 0) return;
	int [] argList = {OS.XmNforeground, 0, OS.XmNbackground, 0};
	OS.XtGetValues (parent.handle, argList, argList.length / 2);
	int color = argList [1] ^ argList [3];
	byte [] bits = {-86, 0, 85, 0, -86, 0, 85, 0, -86, 0, 85, 0, -86, 0, 85, 0};
	int stipplePixmap = OS.XCreateBitmapFromData (display, window, bits, 8, 8);
	int gc = OS.XCreateGC (display, window, 0, null);
	OS.XSetForeground (display, gc, color);
	OS.XSetStipple (display, gc, stipplePixmap);
	OS.XSetSubwindowMode (display, gc, OS.IncludeInferiors);
	OS.XSetFillStyle (display, gc, OS.FillStippled);
	OS.XSetFunction (display, gc, OS.GXxor);
	OS.XFillRectangle (display, window, gc, x, y, width, height);
	OS.XFreePixmap (display, stipplePixmap);
	OS.XFreeGC (display, gc);
	}
	int processMouseDown (int callData) {
	super.processMouseDown (callData);
	XButtonEvent xEvent = new XButtonEvent ();
	OS.memmove (xEvent, callData, XButtonEvent.sizeof);
	if (xEvent.button != 1) return 0;
	startX = xEvent.x; startY = xEvent.y;
	int [] argList = {OS.XmNx, 0, OS.XmNy, 0, OS.XmNwidth, 0, OS.XmNheight, 0, OS.XmNborderWidth, 0};
	OS.XtGetValues (handle, argList, argList.length / 2);
	int border = argList [9], width = argList [5] + (border * 2), height = argList [7] + (border * 2);
	lastX = ((short) argList [1]) - border; lastY = ((short) argList [3]) - border;
	Event event = new Event ();
	event.detail = SWT.DRAG;
	event.time = xEvent.time;
	event.x = lastX; event.y = lastY;
	event.width = width; event.height = height;
	sendEvent (SWT.Selection, event);
	if (event.doit) {
	dragging = true;
	OS.XmUpdateDisplay (handle);
	drawBand (lastX = event.x, lastY = event.y, width, height);
	}
	return 0;
	}
	int processMouseMove (int callData) {
	super.processMouseMove (callData);
	XMotionEvent xEvent = new XMotionEvent ();
	OS.memmove (xEvent, callData, XMotionEvent.sizeof);
	if (!dragging \|\| (xEvent.state & OS.Button1Mask) == 0) return 0;
	int [] argList1 = {OS.XmNx, 0, OS.XmNy, 0, OS.XmNwidth, 0, OS.XmNheight, 0, OS.XmNborderWidth, 0};
	OS.XtGetValues (handle, argList1, argList1.length / 2);
	int border = argList1 [9], x = ((short) argList1 [1]) - border, y = ((short) argList1 [3]) - border;
	int width = argList1 [5] + (border * 2), height = argList1 [7] + (border * 2);
	int [] argList2 = {OS.XmNwidth, 0, OS.XmNheight, 0, OS.XmNborderWidth, 0};
	OS.XtGetValues (parent.handle, argList2, argList2.length / 2);
	int parentBorder = argList2 [5];
	int parentWidth = argList2 [1] + (parentBorder * 2);
	int parentHeight = argList2 [3] + (parentBorder * 2);
	int newX = lastX, newY = lastY;
	if ((style & SWT.VERTICAL) != 0) {
	newX = Math.min (Math.max (0, xEvent.x + x - startX - parentBorder), parentWidth - width);
	} else {
	newY = Math.min (Math.max (0, xEvent.y + y - startY - parentBorder), parentHeight - height);
	}
	if (newX == lastX && newY == lastY) return 0;
	drawBand (lastX, lastY, width, height);
	Event event = new Event ();
	event.detail = SWT.DRAG;
	event.time = xEvent.time;
	event.x = newX; event.y = newY;
	event.width = width; event.height = height;
	sendEvent (SWT.Selection, event);
	if (event.doit) {
	lastX = event.x; lastY = event.y;
	OS.XmUpdateDisplay (handle);
	drawBand (lastX, lastY, width, height);
	}
	return 0;
	}
	int processMouseUp (int callData) {
	super.processMouseUp (callData);
	XButtonEvent xEvent = new XButtonEvent ();
	OS.memmove (xEvent, callData, XButtonEvent.sizeof);
	if (xEvent.button != 1) return 0;
	if (!dragging) return 0;
	dragging = false;
	int [] argList = {OS.XmNwidth, 0, OS.XmNheight, 0, OS.XmNborderWidth, 0};
	OS.XtGetValues (handle, argList, argList.length / 2);
	int border = argList [5];
	int width = argList [1] + (border * 2), height = argList [3] + (border * 2);
	Event event = new Event ();
	event.time = xEvent.time;
	event.x = lastX; event.y = lastY;
	event.width = width; event.height = height;
	drawBand (lastX, lastY, width, height);
	sendEvent (SWT.Selection, event);
	return 0;
	}
	void propagateWidget (boolean enabled) {
	propagateHandle (enabled, handle);
	/*
	* Sashes do not participate in focus traversal.
	*/
	if (enabled) {
	int [] argList = {OS.XmNtraversalOn, 0};
	OS.XtSetValues (handle, argList, argList.length / 2);
	}
	}
	void realizeChildren () {
	super.realizeChildren ();
	int window = OS.XtWindow (handle);
	if (window == 0) return;
	int display = OS.XtDisplay (handle);
	if (display == 0) return;
	if ((style & SWT.HORIZONTAL) != 0) {
	cursor = OS.XCreateFontCursor (display, OS.XC_sb_v_double_arrow);
	} else {
	cursor = OS.XCreateFontCursor (display, OS.XC_sb_h_double_arrow);
	}
	OS.XDefineCursor (display, window, cursor);
	}
	void releaseWidget () {
	super.releaseWidget ();
	if (cursor != 0) {
	int display = OS.XtDisplay (handle);
	if (display != 0) OS.XFreeCursor (display, 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);
	}
	}