| /******************************************************************************* |
| * Copyright (c) 2000, 2004 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.*; |
| import org.eclipse.swt.graphics.*; |
| import org.eclipse.swt.events.*; |
| import org.eclipse.swt.internal.carbon.*; |
| |
| /** |
| * Instances of this class represent a selectable user interface object |
| * that issues notification when pressed and released. |
| * <dl> |
| * <dt><b>Styles:</b></dt> |
| * <dd>CHECK, CASCADE, PUSH, RADIO, SEPARATOR</dd> |
| * <dt><b>Events:</b></dt> |
| * <dd>Arm, Help, Selection</dd> |
| * </dl> |
| * <p> |
| * Note: Only one of the styles CHECK, CASCADE, PUSH, RADIO and SEPARATOR |
| * may be specified. |
| * </p><p> |
| * IMPORTANT: This class is <em>not</em> intended to be subclassed. |
| * </p> |
| */ |
| public class MenuItem extends Item { |
| Menu parent, menu; |
| int accelerator; |
| // int x, y, width, height; |
| |
| /** |
| * Constructs a new instance of this class given its parent |
| * (which must be a <code>Menu</code>) and a style value |
| * describing its behavior and appearance. The item is added |
| * to the end of the items maintained by its parent. |
| * <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 menu 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#CHECK |
| * @see SWT#CASCADE |
| * @see SWT#PUSH |
| * @see SWT#RADIO |
| * @see SWT#SEPARATOR |
| * @see Widget#checkSubclass |
| * @see Widget#getStyle |
| */ |
| public MenuItem (Menu parent, int style) { |
| super (parent, checkStyle (style)); |
| this.parent = parent; |
| parent.createItem (this, parent.getItemCount ()); |
| } |
| |
| /** |
| * Constructs a new instance of this class given its parent |
| * (which must be a <code>Menu</code>), a style value |
| * describing its behavior and appearance, and the index |
| * at which to place it in the items maintained by its parent. |
| * <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 menu control which will be the parent of the new instance (cannot be null) |
| * @param style the style of control to construct |
| * @param index the index to store the receiver in its parent |
| * |
| * @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#CHECK |
| * @see SWT#CASCADE |
| * @see SWT#PUSH |
| * @see SWT#RADIO |
| * @see SWT#SEPARATOR |
| * @see Widget#checkSubclass |
| * @see Widget#getStyle |
| */ |
| public MenuItem (Menu parent, int style, int index) { |
| super (parent, checkStyle (style)); |
| this.parent = parent; |
| parent.createItem (this, index); |
| } |
| |
| /** |
| * Adds the listener to the collection of listeners who will |
| * be notified when the arm events are generated for the control, by sending |
| * it one of the messages defined in the <code>ArmListener</code> |
| * interface. |
| * |
| * @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 ArmListener |
| * @see #removeArmListener |
| */ |
| public void addArmListener (ArmListener listener) { |
| checkWidget (); |
| if (listener == null) error (SWT.ERROR_NULL_ARGUMENT); |
| TypedListener typedListener = new TypedListener (listener); |
| addListener (SWT.Arm, typedListener); |
| } |
| |
| /** |
| * Adds the listener to the collection of listeners who will |
| * be notified when the help events are generated for the control, by sending |
| * it one of the messages defined in the <code>HelpListener</code> |
| * interface. |
| * |
| * @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 HelpListener |
| * @see #removeHelpListener |
| */ |
| public void addHelpListener (HelpListener listener) { |
| checkWidget (); |
| if (listener == null) error (SWT.ERROR_NULL_ARGUMENT); |
| TypedListener typedListener = new TypedListener (listener); |
| addListener (SWT.Help, typedListener); |
| } |
| |
| /** |
| * Adds the listener to the collection of listeners who will |
| * be notified when the menu item is selected, by sending |
| * it one of the messages defined in the <code>SelectionListener</code> |
| * interface. |
| * <p> |
| * When <code>widgetSelected</code> is called, the stateMask field of the event object is valid. |
| * <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); |
| } |
| |
| protected void checkSubclass () { |
| if (!isValidSubclass ()) error (SWT.ERROR_INVALID_SUBCLASS); |
| } |
| |
| static int checkStyle (int style) { |
| return checkBits (style, SWT.PUSH, SWT.CHECK, SWT.RADIO, SWT.SEPARATOR, SWT.CASCADE, 0); |
| } |
| |
| int createEmptyMenu () { |
| /* |
| * Bug in the Macintosh. When a menu bar item does not have |
| * an associated pull down menu, the Macintosh segment faults. |
| * The fix is to temporarily attach an empty menu. |
| */ |
| if ((parent.style & SWT.BAR) != 0) { |
| int outMenuRef [] = new int [1]; |
| if (OS.CreateNewMenu ((short) 0, 0, outMenuRef) != OS.noErr) { |
| error (SWT.ERROR_NO_HANDLES); |
| } |
| return outMenuRef [0]; |
| } |
| return 0; |
| } |
| |
| void destroyEmptyMenu (int index) { |
| if ((parent.style & SWT.BAR) != 0) { |
| if (index == -1) index = parent.indexOf (this); |
| if (index != -1) { |
| short menuIndex = (short) (index + 1); |
| int [] outMenuRef = new int [1]; |
| OS.GetMenuItemHierarchicalMenu (parent.handle, menuIndex, outMenuRef); |
| if (outMenuRef [0] != 0) { |
| OS.DisposeMenu (outMenuRef [0]); |
| } |
| } |
| } |
| } |
| |
| /** |
| * Returns the widget accelerator. An accelerator is the bit-wise |
| * OR of zero or more modifier masks and a key. Examples: |
| * <code>SWT.CONTROL | SWT.SHIFT | 'T', SWT.ALT | SWT.F2</code>. |
| * The default value is zero, indicating that the menu item does |
| * not have an accelerator. |
| * |
| * @return the accelerator or 0 |
| * |
| * </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> |
| */ |
| public int getAccelerator () { |
| checkWidget (); |
| return accelerator; |
| } |
| |
| /*public*/ Rectangle getBounds () { |
| checkWidget (); |
| if ((parent.style & SWT.BAR) != 0) { |
| int index = parent.indexOf (this); |
| if (index == -1) return new Rectangle (0 ,0, 0, 0); |
| Menu menu = display.getMenuBar (); |
| if (parent != menu) return new Rectangle (0 ,0, 0, 0); |
| int outMenuRef [] = new int [1]; |
| if (OS.GetMenuItemHierarchicalMenu (menu.handle, (short)(index + 1), outMenuRef) != OS.noErr) { |
| return new Rectangle (0 ,0, 0, 0); |
| }; |
| Rect rect = new Rect (); |
| //TODO - get the bounds of the menu item from the menu title |
| // if (... code needed to do this ... != OS.noErr) { |
| // return new Rectangle (0 ,0, 0, 0); |
| // } |
| int width = rect.right - rect.left; |
| int height = rect.bottom - rect.top; |
| return new Rectangle (rect.left, rect.top, width, height); |
| } |
| return new Rectangle (0 ,0, 0, 0); |
| // return new Rectangle (x, y, width, height); |
| |
| } |
| |
| /** |
| * Returns <code>true</code> if the receiver is enabled, and |
| * <code>false</code> otherwise. A disabled menu item is typically |
| * not selectable from the user interface and draws with an |
| * inactive or "grayed" look. |
| * |
| * @return the receiver's enabled state |
| * |
| * @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 #isEnabled |
| */ |
| public boolean getEnabled () { |
| checkWidget(); |
| return (state & DISABLED) == 0; |
| } |
| |
| /** |
| * Returns the receiver's cascade menu if it has one or null |
| * if it does not. Only <code>CASCADE</code> menu items can have |
| * a pull down menu. The sequence of key strokes, button presses |
| * and/or button releases that are used to request a pull down |
| * menu is platform specific. |
| * |
| * @return the receiver's menu |
| * |
| * @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> |
| */ |
| public Menu getMenu () { |
| checkWidget (); |
| return menu; |
| } |
| |
| String getNameText () { |
| if ((style & SWT.SEPARATOR) != 0) return "|"; |
| return super.getNameText (); |
| } |
| |
| /** |
| * Returns the receiver's parent, which must be a <code>Menu</code>. |
| * |
| * @return the receiver's parent |
| * |
| * @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> |
| */ |
| public Menu getParent () { |
| checkWidget (); |
| return parent; |
| } |
| |
| /** |
| * Returns <code>true</code> if the receiver is selected, |
| * and false otherwise. |
| * <p> |
| * When the receiver is of type <code>CHECK</code> or <code>RADIO</code>, |
| * it is selected when it is checked. |
| * |
| * @return the selection state |
| * |
| * @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> |
| */ |
| public boolean getSelection () { |
| checkWidget (); |
| if ((style & (SWT.CHECK | SWT.RADIO)) == 0) return false; |
| int index = parent.indexOf (this); |
| if (index == -1) return false; |
| short [] outMark = new short [1]; |
| OS.GetItemMark (parent.handle, (short) (index + 1), outMark); |
| return outMark [0] != 0; |
| } |
| |
| int kEventProcessCommand (int nextHandler, int theEvent, int userData) { |
| //TEMPORARY CODE |
| if (!isEnabled ()) return OS.noErr; |
| |
| if ((style & SWT.CHECK) != 0) { |
| setSelection (!getSelection ()); |
| } else { |
| if ((style & SWT.RADIO) != 0) { |
| if ((parent.getStyle () & SWT.NO_RADIO_GROUP) != 0) { |
| setSelection (!getSelection ()); |
| } else { |
| selectRadio (); |
| } |
| } |
| } |
| int [] modifiers = new int [1]; |
| OS.GetEventParameter (theEvent, OS.kEventParamKeyModifiers, OS.typeUInt32, null, 4, null, modifiers); |
| Event event = new Event (); |
| setInputState (event, (short) 0, OS.GetCurrentEventButtonState (), modifiers [0]); |
| postEvent (SWT.Selection, event); |
| return OS.noErr; |
| } |
| |
| /** |
| * Returns <code>true</code> if the receiver is enabled and all |
| * of the receiver's ancestors are enabled, and <code>false</code> |
| * otherwise. A disabled menu item is typically not selectable from the |
| * user interface and draws with an inactive or "grayed" look. |
| * |
| * @return the receiver's enabled state |
| * |
| * @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 #getEnabled |
| */ |
| public boolean isEnabled () { |
| return getEnabled () && parent.isEnabled (); |
| } |
| |
| int keyGlyph (int key) { |
| switch (key) { |
| case SWT.BS: return OS.kMenuDeleteLeftGlyph; |
| case SWT.CR: return OS.kMenuReturnGlyph; |
| case SWT.DEL: return OS.kMenuDeleteRightGlyph; |
| case SWT.ESC: return OS.kMenuEscapeGlyph; |
| case SWT.LF: return OS.kMenuReturnGlyph; |
| case SWT.TAB: return OS.kMenuTabRightGlyph; |
| case ' ': return OS.kMenuBlankGlyph; |
| // case ' ': return OS.kMenuSpaceGlyph; |
| case SWT.ALT: return OS.kMenuOptionGlyph; |
| case SWT.SHIFT: return OS.kMenuShiftGlyph; |
| case SWT.CONTROL: return OS.kMenuControlISOGlyph; |
| case SWT.COMMAND: return OS.kMenuCommandGlyph; |
| case SWT.ARROW_UP: return OS.kMenuUpArrowGlyph; |
| case SWT.ARROW_DOWN: return OS.kMenuDownArrowGlyph; |
| case SWT.ARROW_LEFT: return OS.kMenuLeftArrowGlyph; |
| case SWT.ARROW_RIGHT: return OS.kMenuRightArrowGlyph; |
| case SWT.PAGE_UP: return OS.kMenuPageUpGlyph; |
| case SWT.PAGE_DOWN: return OS.kMenuPageDownGlyph; |
| case SWT.F1: return OS.kMenuF1Glyph; |
| case SWT.F2: return OS.kMenuF2Glyph; |
| case SWT.F3: return OS.kMenuF3Glyph; |
| case SWT.F4: return OS.kMenuF4Glyph; |
| case SWT.F5: return OS.kMenuF5Glyph; |
| case SWT.F6: return OS.kMenuF6Glyph; |
| case SWT.F7: return OS.kMenuF7Glyph; |
| case SWT.F8: return OS.kMenuF8Glyph; |
| case SWT.F9: return OS.kMenuF9Glyph; |
| case SWT.F10: return OS.kMenuF10Glyph; |
| case SWT.F11: return OS.kMenuF11Glyph; |
| case SWT.F12: return OS.kMenuF12Glyph; |
| } |
| return OS.kMenuNullGlyph; |
| } |
| |
| void releaseChild () { |
| super.releaseChild (); |
| parent.destroyItem (this); |
| } |
| |
| void releaseWidget () { |
| if (menu == null) { |
| destroyEmptyMenu (-1); |
| } else { |
| menu.releaseWidget (); |
| menu.destroyWidget (); |
| } |
| menu = null; |
| super.releaseWidget (); |
| accelerator = 0; |
| if (this == parent.defaultItem) parent.defaultItem = null; |
| parent = null; |
| } |
| |
| /** |
| * Removes the listener from the collection of listeners who will |
| * be notified when the arm events are generated for the control. |
| * |
| * @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 ArmListener |
| * @see #addArmListener |
| */ |
| public void removeArmListener (ArmListener listener) { |
| checkWidget (); |
| if (listener == null) error (SWT.ERROR_NULL_ARGUMENT); |
| if (eventTable == null) return; |
| eventTable.unhook (SWT.Arm, listener); |
| } |
| |
| /** |
| * Removes the listener from the collection of listeners who will |
| * be notified when the help events are generated for the control. |
| * |
| * @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 HelpListener |
| * @see #addHelpListener |
| */ |
| public void removeHelpListener (HelpListener listener) { |
| checkWidget (); |
| if (listener == null) error (SWT.ERROR_NULL_ARGUMENT); |
| if (eventTable == null) return; |
| eventTable.unhook (SWT.Help, listener); |
| } |
| |
| /** |
| * Removes the listener from the collection of listeners who will |
| * be notified when the control is selected. |
| * |
| * @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); |
| } |
| |
| void selectRadio () { |
| int index = 0; |
| MenuItem [] items = parent.getItems (); |
| while (index < items.length && items [index] != this) index++; |
| int i = index - 1; |
| while (i >= 0 && items [i].setRadioSelection (false)) --i; |
| int j = index + 1; |
| while (j < items.length && items [j].setRadioSelection (false)) j++; |
| setSelection (true); |
| } |
| |
| /** |
| * Sets the widget accelerator. An accelerator is the bit-wise |
| * OR of zero or more modifier masks and a key. Examples: |
| * <code>SWT.MOD1 | SWT.MOD2 | 'T', SWT.MOD3 | SWT.F2</code>. |
| * <code>SWT.CONTROL | SWT.SHIFT | 'T', SWT.ALT | SWT.F2</code>. |
| * The default value is zero, indicating that the menu item does |
| * not have an accelerator. |
| * |
| * @param accelerator an integer that is the bit-wise OR of masks and a key |
| * |
| * </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> |
| */ |
| public void setAccelerator (int accelerator) { |
| checkWidget (); |
| int index = parent.indexOf (this); |
| if (index == -1) return; |
| boolean update = (this.accelerator == 0 && accelerator != 0) || (this.accelerator != 0 && accelerator == 0); |
| this.accelerator = accelerator; |
| boolean inSetVirtualKey = false; |
| int inModifiers = OS.kMenuNoModifiers, inGlyph = OS.kMenuNullGlyph, inKey = 0; |
| if (accelerator != 0) { |
| inKey = accelerator & SWT.KEY_MASK; |
| inGlyph = keyGlyph (inKey); |
| int virtualKey = Display.untranslateKey (inKey); |
| if (inKey == ' ') virtualKey = 49; |
| if (virtualKey != 0) { |
| inSetVirtualKey = true; |
| inKey = virtualKey; |
| } else { |
| inKey = Character.toUpperCase ((char)inKey); |
| } |
| inModifiers = (byte) OS.kMenuNoCommandModifier; |
| if ((accelerator & SWT.SHIFT) != 0) inModifiers |= OS.kMenuShiftModifier; |
| if ((accelerator & SWT.CONTROL) != 0) inModifiers |= OS.kMenuControlModifier; |
| if ((accelerator & SWT.COMMAND) != 0) inModifiers &= ~OS.kMenuNoCommandModifier; |
| if ((accelerator & SWT.ALT) != 0) inModifiers |= OS.kMenuOptionModifier; |
| } |
| short menuIndex = (short) (index + 1); |
| OS.SetMenuItemModifiers (parent.handle, menuIndex, (byte)inModifiers); |
| OS.SetMenuItemCommandKey (parent.handle, menuIndex, inSetVirtualKey, (char)inKey); |
| OS.SetMenuItemKeyGlyph (parent.handle, menuIndex, (short)inGlyph); |
| if (update) updateText (menuIndex); |
| } |
| |
| /** |
| * Enables the receiver if the argument is <code>true</code>, |
| * and disables it otherwise. A disabled menu item is typically |
| * not selectable from the user interface and draws with an |
| * inactive or "grayed" look. |
| * |
| * @param enabled the new enabled state |
| * |
| * @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> |
| */ |
| public void setEnabled (boolean enabled) { |
| checkWidget (); |
| int index = parent.indexOf (this); |
| if (index == -1) return; |
| int outMenuRef [] = new int [1]; |
| short menuIndex = (short) (index + 1); |
| OS.GetMenuItemHierarchicalMenu (parent.handle, menuIndex, outMenuRef); |
| if (enabled) { |
| state &= ~DISABLED; |
| if (outMenuRef [0] != 0) OS.EnableMenuItem (outMenuRef [0], (short) 0); |
| OS.EnableMenuItem (parent.handle, menuIndex); |
| } else { |
| state |= DISABLED; |
| if (outMenuRef [0] != 0) OS.DisableMenuItem (outMenuRef [0], (short) 0); |
| OS.DisableMenuItem (parent.handle, menuIndex); |
| } |
| } |
| |
| /** |
| * Sets the image the receiver will display to the argument. |
| * <p> |
| * Note: This operation is a hint and is not supported on |
| * platforms that do not have this concept (for example, Windows NT). |
| * </p> |
| * |
| * @param image the image to display |
| * |
| * @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> |
| */ |
| public void setImage (Image image) { |
| checkWidget (); |
| if ((style & SWT.SEPARATOR) != 0) return; |
| int index = parent.indexOf (this); |
| if (index == -1) return; |
| super.setImage (image); |
| int imageHandle = image != null ? image.handle : 0; |
| byte type = image != null ? (byte)OS.kMenuCGImageRefType : (byte)OS.kMenuNoIcon; |
| OS.SetMenuItemIconHandle (parent.handle, (short) (index + 1), type, imageHandle); |
| } |
| |
| /** |
| * Sets the receiver's pull down menu to the argument. |
| * Only <code>CASCADE</code> menu items can have a |
| * pull down menu. The sequence of key strokes, button presses |
| * and/or button releases that are used to request a pull down |
| * menu is platform specific. |
| * |
| * @param menu the new pull down menu |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_MENU_NOT_DROP_DOWN - if the menu is not a drop down menu</li> |
| * <li>ERROR_MENUITEM_NOT_CASCADE - if the menu item is not a <code>CASCADE</code></li> |
| * <li>ERROR_INVALID_ARGUMENT - if the menu has been disposed</li> |
| * <li>ERROR_INVALID_PARENT - if the menu is not in the same widget tree</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> |
| */ |
| public void setMenu (Menu menu) { |
| checkWidget (); |
| |
| /* Check to make sure the new menu is valid */ |
| if ((style & SWT.CASCADE) == 0) { |
| error (SWT.ERROR_MENUITEM_NOT_CASCADE); |
| } |
| if (menu != null) { |
| if (menu.isDisposed()) error(SWT.ERROR_INVALID_ARGUMENT); |
| if ((menu.style & SWT.DROP_DOWN) == 0) { |
| error (SWT.ERROR_MENU_NOT_DROP_DOWN); |
| } |
| if (menu.parent != parent.parent) { |
| error (SWT.ERROR_INVALID_PARENT); |
| } |
| } |
| |
| /* Assign the new menu */ |
| Menu oldMenu = this.menu; |
| if (oldMenu == menu) return; |
| if (oldMenu != null) oldMenu.cascade = null; |
| this.menu = menu; |
| |
| /* Update the menu in the OS */ |
| int index = parent.indexOf (this); |
| if (index == -1) return; |
| int menuHandle = 0; |
| if (menu == null) { |
| menuHandle = createEmptyMenu (); |
| } else { |
| menu.cascade = this; |
| if (oldMenu == null) destroyEmptyMenu (index); |
| menuHandle = menu.handle; |
| } |
| short menuIndex = (short) (index + 1); |
| if (menuHandle != 0) { |
| int [] outString = new int [1]; |
| if (OS.CopyMenuItemTextAsCFString (parent.handle, menuIndex, outString) != OS.noErr) { |
| error (SWT.ERROR_CANNOT_SET_MENU); |
| } |
| OS.SetMenuTitleWithCFString (menuHandle, outString [0]); |
| OS.CFRelease (outString [0]); |
| } |
| if (OS.SetMenuItemHierarchicalMenu (parent.handle, menuIndex, menuHandle) != OS.noErr) { |
| error (SWT.ERROR_CANNOT_SET_MENU); |
| } |
| } |
| |
| boolean setRadioSelection (boolean value) { |
| if ((style & SWT.RADIO) == 0) return false; |
| if (getSelection () != value) { |
| setSelection (value); |
| postEvent (SWT.Selection); |
| } |
| return true; |
| } |
| |
| /** |
| * Sets the selection state of the receiver. |
| * <p> |
| * When the receiver is of type <code>CHECK</code> or <code>RADIO</code>, |
| * it is selected when it is checked. |
| * |
| * @param selected the new selection state |
| * |
| * @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> |
| */ |
| public void setSelection (boolean selected) { |
| checkWidget (); |
| if ((style & (SWT.CHECK | SWT.RADIO)) == 0) return; |
| int index = parent.indexOf (this); |
| if (index == -1) return; |
| int inMark = selected ? ((style & SWT.RADIO) != 0) ? OS.diamondMark : OS.checkMark : 0; |
| OS.SetItemMark (parent.handle, (short) (index + 1), (short) inMark); |
| } |
| |
| /** |
| * Sets the receiver's text. The string may include |
| * the mnemonic character and accelerator text. |
| * <p> |
| * Mnemonics are indicated by an '&' that causes the next |
| * character to be the mnemonic. When the user presses a |
| * key sequence that matches the mnemonic, a selection |
| * event occurs. On most platforms, the mnemonic appears |
| * underlined but may be emphasised in a platform specific |
| * manner. The mnemonic indicator character '&' can be |
| * escaped by doubling it in the string, causing a single |
| *'&' to be displayed. |
| * </p> |
| * <p> |
| * Accelerator text is indicated by the '\t' character. |
| * On platforms that support accelerator text, the text |
| * that follows the '\t' character is displayed to the user, |
| * typically indicating the key stroke that will cause |
| * the item to become selected. On most platforms, the |
| * accelerator text appears right aligned in the menu. |
| * Setting the accelerator text does not install the |
| * accelerator key sequence. The accelerator key sequence |
| * is installed using #setAccelerator. |
| * </p> |
| * |
| * @param string the new text |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the text 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 #setAccelerator |
| */ |
| public void setText (String string) { |
| checkWidget (); |
| if (string == null) error (SWT.ERROR_NULL_ARGUMENT); |
| if ((style & SWT.SEPARATOR) != 0) return; |
| if (text.equals (string)) return; |
| int index = parent.indexOf (this); |
| if (index == -1) return; |
| super.setText (string); |
| updateText ((short) (index + 1)); |
| } |
| |
| void updateText (short menuIndex) { |
| if ((style & SWT.SEPARATOR) != 0) return; |
| char [] buffer = new char [text.length ()]; |
| text.getChars (0, buffer.length, buffer, 0); |
| int i=0, j=0; |
| while (i < buffer.length) { |
| if (buffer [i] == '\t') break; |
| if ((buffer [j++] = buffer [i++]) == '&') { |
| if (i == buffer.length) {continue;} |
| if (buffer [i] == '&') {i++; continue;} |
| j--; |
| } |
| } |
| int str = OS.CFStringCreateWithCharacters (OS.kCFAllocatorDefault, buffer, j); |
| if (str == 0) error (SWT.ERROR_CANNOT_SET_TEXT); |
| OS.SetMenuItemTextWithCFString (parent.handle, menuIndex, str); |
| int [] outHierMenu = new int [1]; |
| OS.GetMenuItemHierarchicalMenu (parent.handle, menuIndex, outHierMenu); |
| if (outHierMenu [0] != 0) OS.SetMenuTitleWithCFString (outHierMenu [0], str); |
| OS.CFRelease (str); |
| } |
| } |
| |