| /******************************************************************************* |
| * 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.internal.carbon.CFRange; |
| 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, 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 { |
| Cursor sizeCursor; |
| boolean dragging; |
| int lastX, lastY, startX, startY; |
| static final int INCREMENT = 1; |
| static final int PAGE_INCREMENT = 9; |
| static final String [] AX_ATTRIBUTES = { |
| OS.kAXOrientationAttribute, |
| OS.kAXValueAttribute, |
| OS.kAXMaxValueAttribute, |
| OS.kAXMinValueAttribute, |
| }; |
| |
| /** |
| * 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)); |
| int cursorStyle = (style & SWT.VERTICAL) != 0 ? SWT.CURSOR_SIZEWE : SWT.CURSOR_SIZENS; |
| sizeCursor = new Cursor (display, cursorStyle); |
| } |
| |
| /** |
| * 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) { |
| /* |
| * Macintosh only supports smooth dragging. |
| */ |
| style |= SWT.SMOOTH; |
| return checkBits (style, SWT.HORIZONTAL, SWT.VERTICAL, 0, 0, 0, 0); |
| } |
| |
| int callFocusEventHandler (int nextHandler, int theEvent) { |
| return OS.noErr; |
| } |
| |
| 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 () { |
| state |= GRAB | THEME_BACKGROUND; |
| int features = OS.kControlSupportsFocus; |
| 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, int context) { |
| fillBackground (control, context, null); |
| } |
| |
| String [] getAxAttributes () { |
| return AX_ATTRIBUTES; |
| } |
| |
| int kEventAccessibleGetNamedAttribute (int nextHandler, int theEvent, int userData) { |
| int code = OS.eventNotHandledErr; |
| int [] stringRef = new int [1]; |
| OS.GetEventParameter (theEvent, OS.kEventParamAccessibleAttributeName, OS.typeCFStringRef, null, 4, null, stringRef); |
| int length = 0; |
| if (stringRef [0] != 0) length = OS.CFStringGetLength (stringRef [0]); |
| char [] buffer = new char [length]; |
| CFRange range = new CFRange (); |
| range.length = length; |
| OS.CFStringGetCharacters (stringRef [0], range, buffer); |
| String attributeName = new String(buffer); |
| if (attributeName.equals (OS.kAXRoleAttribute) || attributeName.equals (OS.kAXRoleDescriptionAttribute)) { |
| String roleText = OS.kAXSplitterRole; |
| buffer = new char [roleText.length ()]; |
| roleText.getChars (0, buffer.length, buffer, 0); |
| stringRef [0] = OS.CFStringCreateWithCharacters (OS.kCFAllocatorDefault, buffer, buffer.length); |
| if (stringRef [0] != 0) { |
| if (attributeName.equals (OS.kAXRoleAttribute)) { |
| OS.SetEventParameter (theEvent, OS.kEventParamAccessibleAttributeValue, OS.typeCFStringRef, 4, stringRef); |
| } else { // kAXRoleDescriptionAttribute |
| int stringRef2 = OS.HICopyAccessibilityRoleDescription (stringRef [0], 0); |
| OS.SetEventParameter (theEvent, OS.kEventParamAccessibleAttributeValue, OS.typeCFStringRef, 4, new int [] {stringRef2}); |
| OS.CFRelease(stringRef2); |
| } |
| OS.CFRelease(stringRef [0]); |
| code = OS.noErr; |
| } |
| } else if (attributeName.equals (OS.kAXOrientationAttribute)) { |
| String orientation = (style & SWT.VERTICAL) != 0 ? OS.kAXVerticalOrientationValue : OS.kAXHorizontalOrientationValue; |
| buffer = new char [orientation.length ()]; |
| orientation.getChars (0, buffer.length, buffer, 0); |
| stringRef [0] = OS.CFStringCreateWithCharacters (OS.kCFAllocatorDefault, buffer, buffer.length); |
| if (stringRef [0] != 0) { |
| OS.SetEventParameter (theEvent, OS.kEventParamAccessibleAttributeValue, OS.typeCFStringRef, 4, stringRef); |
| OS.CFRelease(stringRef [0]); |
| code = OS.noErr; |
| } |
| } else if (attributeName.equals (OS.kAXValueAttribute)) { |
| Point location = getLocation(); |
| int value = (style & SWT.VERTICAL) != 0 ? location.x : location.y; |
| OS.SetEventParameter (theEvent, OS.kEventParamAccessibleAttributeValue, OS.typeSInt32, 4, new int [] {value}); |
| code = OS.noErr; |
| } else if (attributeName.equals (OS.kAXMaxValueAttribute)) { |
| Rect parentBounds = new Rect (); |
| OS.GetControlBounds (parent.handle, parentBounds); |
| int maxValue = (style & SWT.VERTICAL) != 0 ? |
| parentBounds.right - parentBounds.left : |
| parentBounds.bottom - parentBounds.top; |
| OS.SetEventParameter (theEvent, OS.kEventParamAccessibleAttributeValue, OS.typeSInt32, 4, new int [] {maxValue}); |
| code = OS.noErr; |
| } else if (attributeName.equals (OS.kAXMinValueAttribute)) { |
| OS.SetEventParameter (theEvent, OS.kEventParamAccessibleAttributeValue, OS.typeSInt32, 4, new int [] {0}); |
| code = OS.noErr; |
| } |
| if (accessible != null) { |
| code = accessible.internal_kEventAccessibleGetNamedAttribute (nextHandler, theEvent, code); |
| } |
| return code; |
| } |
| |
| 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 kEventControlGetFocusPart (int nextHandler, int theEvent, int userData) { |
| return OS.noErr; |
| } |
| |
| int kEventControlSetCursor (int nextHandler, int theEvent, int userData) { |
| int result = super.kEventControlSetCursor (nextHandler, theEvent, userData); |
| if (result == OS.noErr) return result; |
| display.setCursor (sizeCursor.handle); |
| return OS.noErr; |
| } |
| |
| int kEventControlSetFocusPart (int nextHandler, int theEvent, int userData) { |
| int result = super.kEventControlSetFocusPart (nextHandler, theEvent, userData); |
| if (result == OS.noErr) { |
| Point location = getLocation(); |
| lastX = location.x; |
| lastY = location.y; |
| } |
| return result; |
| } |
| |
| int kEventUnicodeKeyPressed (int nextHandler, int theEvent, int userData) { |
| int result = super.kEventUnicodeKeyPressed (nextHandler, theEvent, userData); |
| if (result == OS.noErr) return result; |
| int [] keyboardEvent = new int [1]; |
| OS.GetEventParameter (theEvent, OS.kEventParamTextInputSendKeyboardEvent, OS.typeEventRef, null, keyboardEvent.length * 4, null, keyboardEvent); |
| int [] keyCode = new int [1]; |
| OS.GetEventParameter (keyboardEvent [0], OS.kEventParamKeyCode, OS.typeUInt32, null, keyCode.length * 4, null, keyCode); |
| switch (keyCode [0]) { |
| case 126: /* Up arrow */ |
| case 123: /* Left arrow */ |
| case 125: /* Down arrow */ |
| case 124: /* Right arrow */ { |
| int xChange = 0, yChange = 0; |
| int stepSize = PAGE_INCREMENT; |
| int [] modifiers = new int [1]; |
| OS.GetEventParameter (theEvent, OS.kEventParamKeyModifiers, OS.typeUInt32, null, 4, null, modifiers); |
| if ((modifiers [0] & OS.controlKey) != 0) stepSize = INCREMENT; |
| if ((style & SWT.VERTICAL) != 0) { |
| if (keyCode [0] == 126 || keyCode [0] == 125) break; |
| xChange = keyCode [0] == 123 ? -stepSize : stepSize; |
| } else { |
| if (keyCode [0] == 123 || keyCode [0] == 124) break; |
| yChange = keyCode [0] == 126 ? -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 result; |
| 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 result; |
| 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)); |
| } |
| 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 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); |
| } |
| |
| boolean sendMouseEvent (int type, short button, int count, int detail, boolean send, int chord, short x, short y, int modifiers) { |
| boolean result = super.sendMouseEvent (type, button, count, detail, send, chord, x, y, modifiers); |
| Rect rect = new Rect (); |
| OS.GetControlBounds (handle, rect); |
| int controlX = rect.left; |
| int controlY = rect.top; |
| int width = rect.right - rect.left; |
| int height = rect.bottom - rect.top; |
| OS.GetControlBounds (parent.handle, rect); |
| int parentWidth = rect.right - rect.left; |
| int parentHeight = rect.bottom - rect.top; |
| switch (type) { |
| case SWT.MouseDown: |
| if (button != 1 || count != 1) break; |
| startX = x; |
| startY = y; |
| Event event = new Event (); |
| event.x = controlX; |
| event.y = controlY; |
| event.width = width; |
| event.height = height; |
| sendEvent (SWT.Selection, event); |
| if (isDisposed ()) return result; |
| if (event.doit) { |
| lastX = event.x; |
| lastY = event.y; |
| dragging = true; |
| setBounds (event.x, event.y, width, height); |
| } |
| break; |
| case SWT.MouseUp: |
| if (!dragging) break; |
| dragging = false; |
| event = new Event (); |
| event.x = lastX; |
| event.y = lastY; |
| event.width = width; |
| event.height = height; |
| sendEvent (SWT.Selection, event); |
| if (isDisposed ()) return result; |
| if (event.doit) { |
| setBounds (event.x, event.y, width, height); |
| } |
| break; |
| case SWT.MouseMove: |
| if (!dragging) break; |
| int newX = lastX, newY = lastY; |
| if ((style & SWT.VERTICAL) != 0) { |
| newX = Math.min (Math.max (0, x + controlX - startX), parentWidth - width); |
| } else { |
| newY = Math.min (Math.max (0, y + controlY - startY), parentHeight - height); |
| } |
| if (newX == lastX && newY == lastY) return result; |
| event = new Event (); |
| event.x = newX; |
| event.y = newY; |
| event.width = width; |
| event.height = height; |
| sendEvent (SWT.Selection, event); |
| if (isDisposed ()) return result; |
| if (event.doit) { |
| lastX = event.x; |
| lastY = event.y; |
| setBounds (event.x, event.y, width, height); |
| } |
| break; |
| } |
| return result; |
| } |
| |
| int traversalCode (int key, int theEvent) { |
| return 0; |
| } |
| |
| } |