| /******************************************************************************* |
| * Copyright (c) 2000, 2008 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.graphics.*; |
| import org.eclipse.swt.internal.wpf.*; |
| import org.eclipse.swt.*; |
| 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 intended to be subclassed <em>only</em> |
| * within the SWT implementation. |
| * </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); |
| } |
| |
| void createHandle () { |
| state |= THEME_BACKGROUND; |
| handle = OS.gcnew_Canvas (); |
| if (handle == 0) error (SWT.ERROR_NO_HANDLES); |
| OS.UIElement_Focusable (handle, true); |
| int newCursor = (style & SWT.VERTICAL)!= 0 ? OS.Cursors_SizeWE () : OS.Cursors_SizeNS (); |
| OS.FrameworkElement_Cursor (handle, newCursor); |
| OS.GCHandle_Free (newCursor); |
| } |
| |
| int defaultBackground () { |
| return OS.SystemColors_ControlColor; |
| } |
| |
| void HandlePreviewGotKeyboardFocus (int sender, int e) { |
| super.HandlePreviewGotKeyboardFocus (sender, e); |
| if (!checkEvent (e)) return; |
| Point location = getLocation(); |
| lastX = location.x; |
| lastY = location.y; |
| } |
| |
| void HandlePreviewKeyDown (int sender, int e) { |
| super.HandlePreviewKeyDown (sender, e); |
| if (!checkEvent (e)) return; |
| int key = OS.KeyEventArgs_Key (e); |
| switch (key) { |
| case OS.Key_Left: |
| case OS.Key_Right: |
| case OS.Key_Up: |
| case OS.Key_Down: |
| int xChange = 0, yChange = 0; |
| int stepSize = PAGE_INCREMENT; |
| int keyboardDevice = OS.KeyboardEventArgs_KeyboardDevice(e); |
| int modifiers = OS.KeyboardDevice_Modifiers(keyboardDevice); |
| OS.GCHandle_Free(keyboardDevice); |
| if ((modifiers & OS.ModifierKeys_Control) != 0) stepSize = INCREMENT; |
| if ((style & SWT.VERTICAL) != 0) { |
| if (key == OS.Key_Up || key == OS.Key_Down) break; |
| xChange = key == OS.Key_Left ? -stepSize : stepSize; |
| } else { |
| if (key == OS.Key_Left || key == OS.Key_Right) break; |
| yChange = key == OS.Key_Up ? -stepSize : stepSize; |
| } |
| |
| Rectangle bounds = getBounds (); |
| int width = bounds.width, height = bounds.height; |
| Rectangle parentBounds = parent.getBounds (); |
| int parentWidth = parentBounds.width; |
| int parentHeight = parentBounds.height; |
| int newX = lastX, newY = lastY; |
| if ((style & SWT.VERTICAL) != 0) { |
| newX = Math.min (Math.max (0, lastX + xChange), parentWidth - width); |
| } else { |
| newY = Math.min (Math.max (0, lastY + yChange), parentHeight - height); |
| } |
| if (newX == lastX && newY == lastY) return; |
| Event event = new Event (); |
| event.x = newX; |
| event.y = newY; |
| event.width = width; |
| event.height = height; |
| sendEvent (SWT.Selection, event); |
| if (isDisposed ()) break; |
| if (event.doit) { |
| setBounds (event.x, event.y, width, height); |
| if (isDisposed ()) break; |
| lastX = event.x; |
| lastY = event.y; |
| if (isDisposed ()) return; |
| int cursorX = event.x, cursorY = event.y; |
| if ((style & SWT.VERTICAL) != 0) { |
| cursorY += height / 2; |
| } else { |
| cursorX += width / 2; |
| } |
| display.setCursorLocation (parent.toDisplay (cursorX, cursorY)); |
| } |
| OS.RoutedEventArgs_Handled(e, true); |
| break; |
| } |
| } |
| |
| void HandlePreviewMouseDown (int sender, int e) { |
| super.HandlePreviewMouseDown (sender, e); |
| int eventPos = OS.MouseEventArgs_GetPosition (e, handle); |
| startX = (int) OS.Point_X (eventPos); |
| startY = (int) OS.Point_Y (eventPos); |
| OS.GCHandle_Free (eventPos); |
| Point location = parent.getLocation (this); |
| int x = location.x; |
| int y = location.y; |
| int width = (int) OS.FrameworkElement_ActualWidth (handle); |
| int height = (int) OS.FrameworkElement_ActualHeight (handle); |
| lastX = x; |
| lastY = y; |
| Event event = new Event (); |
| event.x = lastX; |
| event.y = lastY; |
| event.width = width; |
| event.height = height; |
| sendEvent (SWT.Selection, event); |
| if (event.doit) { |
| dragging = true; |
| lastX = event.x; |
| lastY = event.y; |
| OS.UIElement_CaptureMouse (handle); |
| } |
| } |
| |
| void HandlePreviewMouseUp (int sender, int e) { |
| super.HandlePreviewMouseUp (sender, e); |
| if (!dragging) return; |
| OS.UIElement_ReleaseMouseCapture (handle); |
| dragging = false; |
| int width = (int) OS.FrameworkElement_ActualWidth (handle); |
| int height = (int) OS.FrameworkElement_ActualHeight (handle); |
| Event event = new Event (); |
| event.x = lastX; |
| event.y = lastY; |
| event.width = width; |
| event.height = height; |
| sendEvent (SWT.Selection, event); |
| } |
| |
| void HandlePreviewMouseMove (int sender, int e) { |
| super.HandlePreviewMouseMove (sender, e); |
| if (!dragging) return; |
| int eventPos = OS.MouseEventArgs_GetPosition (e, handle); |
| int eventX = (int) OS.Point_X (eventPos); |
| int eventY = (int) OS.Point_Y (eventPos); |
| OS.GCHandle_Free (eventPos); |
| Point location = parent.getLocation (this); |
| int x = location.x; |
| int y = location.y; |
| int width = (int) OS.FrameworkElement_ActualWidth (handle); |
| int height = (int) OS.FrameworkElement_ActualHeight (handle); |
| int parentWidth = (int) OS.FrameworkElement_ActualWidth (parent.handle); |
| int parentHeight = (int) OS.FrameworkElement_ActualHeight (parent.handle); |
| int newX = lastX, newY = lastY; |
| if ((style & SWT.VERTICAL) != 0) { |
| newX = Math.min (Math.max (0, eventX + x - startX), parentWidth - width); |
| } else { |
| newY = Math.min (Math.max (0, eventY + y - startY), parentHeight - height); |
| } |
| if (newX == lastX && newY == lastY) return; |
| Event event = new Event (); |
| event.x = newX; |
| event.y = newY; |
| event.width = width; |
| event.height = height; |
| sendEvent (SWT.Selection, event); |
| if (isDisposed ()) return; |
| if (event.doit) { |
| lastX = event.x; |
| lastY = event.y; |
| } |
| } |
| |
| /** |
| * 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, int event) { |
| return 0; |
| } |
| |
| } |