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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.internal.carbon.OS;
import org.eclipse.swt.internal.carbon.Rect;
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>
* 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 {
Cursor sizeCursor;
/**
* 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));
int cursorStyle = (style & SWT.VERTICAL) != 0 ? SWT.CURSOR_SIZEWE : SWT.CURSOR_SIZENS;
sizeCursor = new Cursor (getDisplay (), cursorStyle);
}
/**
* 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 width = 0, height = 0;
if ((style & SWT.HORIZONTAL) != 0) {
width += DEFAULT_WIDTH; height += 5;
} else {
width += 5; height += DEFAULT_HEIGHT;
}
if (wHint != SWT.DEFAULT) width = wHint;
if (hHint != SWT.DEFAULT) height = hHint;
return new Point (width, height);
}
void createHandle () {
int features = OS.kControlSupportsEmbedding | OS.kControlSupportsFocus | OS.kControlGetsFocusOnClick;
int [] outControl = new int [1];
int window = OS.GetControlOwner (parent.handle);
OS.CreateUserPaneControl (window, null, features, outControl);
if (outControl [0] == 0) error (SWT.ERROR_NO_HANDLES);
handle = outControl [0];
}
void drawBackground (int control) {
drawBackground (control, background);
}
int kEventControlClick (int nextHandler, int theEvent, int userData) {
int result = super.kEventControlClick (nextHandler, theEvent, userData);
if (result == OS.noErr) return result;
if (!isEnabled ()) return OS.noErr;
return result;
}
int kEventControlSetCursor (int nextHandler, int theEvent, int userData) {
int result = super.kEventControlSetCursor (nextHandler, theEvent, userData);
if (result == OS.noErr) return result;
setCursor (sizeCursor.handle);
return OS.noErr;
}
int kEventMouseDown (int nextHandler, int theEvent, int userData) {
int result = super.kEventMouseDown (nextHandler, theEvent, userData);
if (result == OS.noErr) return result;
Rect rect = new Rect ();
OS.GetControlBounds (handle, rect);
int startX = rect.left;
int startY = rect.top;
int width = rect.right - rect.left;
int height = rect.bottom - rect.top;
OS.GetControlBounds (parent.handle, rect);
Event event = new Event ();
event.x = startX -= rect.left;
event.y = startY -= rect.top;
event.width = width;
event.height = height;
sendEvent (SWT.Selection, event);
if (isDisposed ()) return result;
if (!event.doit) return result;
int sizeof = org.eclipse.swt.internal.carbon.Point.sizeof;
org.eclipse.swt.internal.carbon.Point pt = new org.eclipse.swt.internal.carbon.Point ();
OS.GetEventParameter (theEvent, OS.kEventParamMouseLocation, OS.typeQDPoint, null, sizeof, null, pt);
int window = OS.GetControlOwner (handle);
OS.GetWindowBounds (window, (short) OS.kWindowContentRgn, rect);
int offsetX = pt.h - rect.left;
int offsetY = pt.v - rect.top;
OS.GetControlBounds (handle, rect);
offsetX -= rect.left;
offsetY -= rect.top;
int port = OS.GetWindowPort (window);
int [] outModifiers = new int [1];
short [] outResult = new short [1];
org.eclipse.swt.internal.carbon.Point outPt = new org.eclipse.swt.internal.carbon.Point ();
while (outResult [0] != OS.kMouseTrackingMouseUp) {
OS.TrackMouseLocationWithOptions (port, 0, OS.kEventDurationForever, outPt, outModifiers, outResult);
switch (outResult [0]) {
case OS.kMouseTrackingMouseDown:
case OS.kMouseTrackingMouseUp:
case OS.kMouseTrackingMouseDragged: {
OS.GetControlBounds (parent.handle, rect);
int x = outPt.h - rect.left;
int y = outPt.v - rect.top;
int newX = startX, newY = startY;
if ((style & SWT.VERTICAL) != 0) {
int clientWidth = rect.right - rect.left;
newX = Math.min (Math.max (0, x - offsetX), clientWidth - width);
} else {
int clientHeight = rect.bottom - rect.top;
newY = Math.min (Math.max (0, y - offsetY), clientHeight - height);
}
event = new Event ();
event.x = newX;
event.y = newY;
event.width = width;
event.height = height;
event.detail = 0; //outResult [0] == OS.kMouseTrackingMouseDragged ? SWT.DRAG : 0;
sendEvent (SWT.Selection, event);
if (isDisposed ()) return result;
if (event.doit) {
setBounds (newX, newY, width, height);
Shell shell = parent.getShell ();
shell.update (true);
}
break;
}
default:
outResult [0] = OS.kMouseTrackingMouseUp;
break;
}
}
return result;
}
void releaseWidget () {
super.releaseWidget ();
if (sizeCursor != null) sizeCursor.dispose ();
sizeCursor = null;
}
/**
* 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);
}
}
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