| /******************************************************************************* |
| * Copyright (c) 2000, 2005 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.*; |
| import org.eclipse.swt.internal.motif.*; |
| import org.eclipse.swt.*; |
| import org.eclipse.swt.graphics.*; |
| import org.eclipse.swt.events.*; |
| |
| /** |
| * 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 { |
| int accelerator; |
| Menu parent, menu; |
| |
| /** |
| * 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; |
| createWidget (OS.XmLAST_POSITION); |
| } |
| |
| /** |
| * 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; |
| if (index == OS.XmLAST_POSITION) error (SWT.ERROR_INVALID_RANGE); |
| createWidget (index); |
| } |
| void addAccelerator () { |
| if (accelerator == 0 || !getEnabled ()) return; |
| /* |
| * Bug in Solaris. When accelerators are set more |
| * than once in the same menu bar, the time it takes |
| * to set the accelerator increases exponentially. |
| * The fix is to implement our own accelerator table |
| * on Solaris. |
| */ |
| if (OS.IsSunOS) return; |
| String ctrl, alt, shift; |
| ctrl = alt = shift = ""; |
| if ((accelerator & SWT.ALT) != 0) alt = "Meta "; |
| if ((accelerator & SWT.SHIFT) != 0) shift = "Shift "; |
| if ((accelerator & SWT.CONTROL) != 0) ctrl = "Ctrl "; |
| int keysym = accelerator & SWT.KEY_MASK; |
| int newKey = Display.untranslateKey (keysym); |
| if (newKey != 0) { |
| keysym = newKey; |
| } else { |
| keysym = Display.wcsToMbcs ((char) keysym); |
| } |
| /* |
| * Feature in Motif. Motif does not activate an accelerator |
| * when the CapsLock, NumLock and NumLock+CapsLock keys are pressed. |
| * In order to activate accelerators when these keys are pressed, |
| * it is necessary to look for all of these key sequences. The fix |
| * is to add these modifiers to the accelerator. |
| */ |
| String key = ctrl + alt + shift + "<Key>" + keysymName (keysym); |
| String allKeys = key + ",Lock " + key; |
| String numLock = Display.numLock; |
| if (numLock != null) { |
| allKeys += "," + numLock + " " + key + ",Lock " + numLock + " " + key; |
| } |
| /* Use the character encoding for the default locale */ |
| byte [] buffer = Converter.wcsToMbcs (null, allKeys, true); |
| int ptr = OS.XtMalloc (buffer.length); |
| if (ptr != 0) OS.memmove (ptr, buffer, buffer.length); |
| |
| int [] argList = {OS.XmNaccelerator, ptr}; |
| OS.XtSetValues (handle, argList, argList.length / 2); |
| if (ptr != 0) OS.XtFree (ptr); |
| } |
| void addAccelerators () { |
| addAccelerator (); |
| if (menu != null) menu.addAccelerators (); |
| } |
| /** |
| * 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); |
| } |
| static int checkStyle (int style) { |
| return checkBits (style, SWT.PUSH, SWT.CHECK, SWT.RADIO, SWT.SEPARATOR, SWT.CASCADE, 0); |
| } |
| protected void checkSubclass () { |
| if (!isValidSubclass ()) error (SWT.ERROR_INVALID_SUBCLASS); |
| } |
| void createHandle (int index) { |
| state |= HANDLE; |
| int parentHandle = parent.handle; |
| int [] argList1 = {OS.XmNchildren, 0, OS.XmNnumChildren, 0}; |
| OS.XtGetValues (parentHandle, argList1, argList1.length / 2); |
| if (index != OS.XmLAST_POSITION && argList1 [1] != 0) { |
| int [] handles = new int [argList1 [3]]; |
| OS.memmove (handles, argList1 [1], argList1 [3] * 4); |
| int i = 0, count = 0; |
| while (i < argList1 [3]) { |
| if (OS.XtIsManaged (handles [i])) { |
| if (index == count) break; |
| count++; |
| } |
| i++; |
| } |
| if (index != count) error (SWT.ERROR_INVALID_RANGE); |
| index = i; |
| } |
| if ((style & SWT.SEPARATOR) != 0) { |
| int [] argList = { |
| OS.XmNancestorSensitive, 1, |
| OS.XmNorientation, (parent.style & SWT.BAR) != 0 ? OS.XmVERTICAL : OS.XmHORIZONTAL, |
| OS.XmNpositionIndex, index, |
| }; |
| handle = OS.XmCreateSeparatorGadget (parentHandle, null, argList, argList.length / 2); |
| if (handle == 0) error (SWT.ERROR_NO_HANDLES); |
| return; |
| } |
| int [] argList = { |
| OS.XmNancestorSensitive, 1, |
| OS.XmNpositionIndex, index, |
| }; |
| if ((style & SWT.PUSH) != 0) { |
| handle = OS.XmCreatePushButtonGadget (parentHandle, null, argList, argList.length / 2); |
| if (handle == 0) error (SWT.ERROR_NO_HANDLES); |
| return; |
| } |
| if ((style & (SWT.CHECK | SWT.RADIO)) != 0) { |
| handle = OS.XmCreateToggleButtonGadget (parentHandle, null, argList, argList.length / 2); |
| if (handle == 0) error (SWT.ERROR_NO_HANDLES); |
| int indicatorType = OS.XmONE_OF_MANY; |
| if ((style & SWT.CHECK) != 0) indicatorType = OS.XmN_OF_MANY; |
| int [] argList2 = {OS.XmNindicatorType, indicatorType}; |
| OS.XtSetValues (handle, argList2, argList2.length / 2); |
| return; |
| } |
| handle = OS.XmCreateCascadeButtonGadget (parentHandle, null, argList, argList.length / 2); |
| if (handle == 0) error (SWT.ERROR_NO_HANDLES); |
| } |
| void destroyWidget () { |
| /* |
| * Feature in Motif. When a popup menu item |
| * is destroyed, the menu does not recompute |
| * the menu size until the next time the menu |
| * is managed. This means that the user can |
| * watch the menu get updated as new items are |
| * added and old ones deleted. The fix is to |
| * unmanaged the item before destroying it to |
| * force the menu to recompute the menu size. |
| */ |
| OS.XtUnmanageChild (handle); |
| super.destroyWidget (); |
| } |
| /** |
| * 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 (!OS.XtIsManaged (handle)) return new Rectangle (0, 0, 0, 0); |
| int [] argList = {OS.XmNx, 0, OS.XmNy, 0, OS.XmNwidth, 0, OS.XmNheight, 0}; |
| OS.XtGetValues (handle, argList, argList.length / 2); |
| return new Rectangle ((short) argList [1], (short) argList [3], argList [5], argList [7]); |
| } |
| /** |
| * 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(); |
| int [] argList = {OS.XmNsensitive, 0}; |
| OS.XtGetValues (handle, argList, argList.length / 2); |
| return argList [1] != 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 [] argList = {OS.XmNset, 0}; |
| OS.XtGetValues (handle, argList, argList.length / 2); |
| return argList [1] != OS.XmUNSET; |
| } |
| void hookEvents () { |
| if ((style & SWT.SEPARATOR) != 0) return; |
| int windowProc = display.windowProc; |
| OS.XtAddCallback (handle, OS.XmNhelpCallback, windowProc, HELP_CALLBACK); |
| if ((style & SWT.CASCADE) != 0) { |
| OS.XtAddCallback (handle, OS.XmNactivateCallback, windowProc, ACTIVATE_CALLBACK); |
| OS.XtAddCallback (handle, OS.XmNcascadingCallback, windowProc, CASCADING_CALLBACK); |
| } else { |
| OS.XtAddCallback (handle, OS.XmNarmCallback, windowProc, ARM_CALLBACK); |
| if ((style & (SWT.CHECK | SWT.RADIO)) != 0) { |
| OS.XtAddCallback (handle, OS.XmNvalueChangedCallback, windowProc, VALUE_CHANGED_CALLBACK); |
| } else { |
| OS.XtAddCallback (handle, OS.XmNactivateCallback, windowProc, ACTIVATE_CALLBACK); |
| } |
| } |
| } |
| boolean isAccelActive () { |
| Menu menu = parent; |
| while (menu != null && menu.cascade != null) { |
| menu = menu.cascade.parent; |
| } |
| if (menu == null) return false; |
| Decorations shell = menu.parent; |
| return shell.menuBar == menu; |
| } |
| /** |
| * 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 (); |
| } |
| String keysymName (int keysym) { |
| switch (keysym) { |
| case SWT.BS: return "BackSpace"; |
| case SWT.TAB: return "Tab"; |
| /* |
| * Bug in Motif. For some reason, the XmNaccelerator |
| * resource will not accept XK_Linefeed and prints Xt |
| * warnings. The fix is to use XK_Return instead. |
| */ |
| // case SWT.LF: |
| // case OS.XK_Linefeed: return "Linefeed"; |
| case SWT.LF: |
| case OS.XK_Linefeed: |
| case SWT.CR: return "Return"; |
| case SWT.ESC: return "Escape"; |
| case SWT.DEL: return "Delete"; |
| } |
| if (('0' <= keysym && keysym <= '9') || |
| ('a' <= keysym && keysym <= 'z') || |
| ('A' <= keysym && keysym <= 'Z')) { |
| return new String (new char [] {(char) keysym}); |
| } |
| /* |
| * Note that XKeysymToString returns a value in a static |
| * area which must not be modified or freed. |
| */ |
| int ptr = OS.XKeysymToString (keysym); |
| if (ptr == 0) return ""; |
| int length = OS.strlen (ptr); |
| byte [] buffer = new byte [length]; |
| OS.memmove (buffer, ptr, buffer.length); |
| /* Use the character encoding for the default locale */ |
| return new String (Converter.mbcsToWcs (null, buffer)); |
| } |
| void manageChildren () { |
| OS.XtManageChild (handle); |
| } |
| void releaseChild () { |
| super.releaseChild (); |
| if (menu != null) menu.dispose (); |
| menu = null; |
| } |
| void releaseWidget () { |
| if (menu != null && !menu.isDisposed ()) menu.releaseResources (); |
| menu = null; |
| super.releaseWidget (); |
| accelerator = 0; |
| if (this == parent.defaultItem) { |
| parent.defaultItem = null; |
| } |
| parent = null; |
| } |
| void removeAccelerator () { |
| if (accelerator == 0) return; |
| /* |
| * Bug in Solaris. When accelerators are set more |
| * than once in the same menu bar, the time it takes |
| * to set the accelerator increases exponentially. |
| * The fix is to implement our own accelerator table |
| * on Solaris. |
| */ |
| if (OS.IsSunOS) return; |
| int [] argList = {OS.XmNaccelerator, 0}; |
| OS.XtSetValues (handle, argList, argList.length / 2); |
| } |
| void removeAccelerators () { |
| removeAccelerator (); |
| if (menu != null) menu.removeAccelerators (); |
| } |
| /** |
| * 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(); |
| if (this.accelerator == accelerator) return; |
| this.accelerator = accelerator; |
| if (isAccelActive ()) { |
| if (accelerator != 0) { |
| addAccelerator (); |
| } else { |
| removeAccelerator (); |
| } |
| } |
| } |
| /** |
| * 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(); |
| if (getEnabled () == enabled) return; |
| int [] argList = {OS.XmNsensitive, enabled ? 1 : 0}; |
| OS.XtSetValues (handle, argList, argList.length / 2); |
| if (isAccelActive ()) { |
| if (enabled) { |
| addAccelerator (); |
| } else { |
| removeAccelerator (); |
| } |
| } |
| } |
| /** |
| * 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; |
| |
| /* |
| * Bug in Motif. When XmNsubMenuId is set and the |
| * previous menu has accelerators, the time it takes |
| * to add any new accelerators increases exponentially. |
| * The fix is to remove the accelerators from the previous |
| * menu before setting the new one. |
| */ |
| boolean isActive = isAccelActive (); |
| if (isActive) removeAccelerators (); |
| |
| if (oldMenu != null) oldMenu.cascade = null; |
| this.menu = menu; |
| |
| /* Set the new menu in the OS */ |
| int menuHandle = 0; |
| if (menu != null) { |
| menu.cascade = this; |
| menuHandle = menu.handle; |
| } |
| int [] argList = {OS.XmNsubMenuId, menuHandle}; |
| OS.XtSetValues (handle, argList, argList.length / 2); |
| |
| if (isActive) addAccelerators (); |
| } |
| 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 [] argList = {OS.XmNset, selected ? OS.XmSET : OS.XmUNSET}; |
| OS.XtSetValues (handle, argList, argList.length / 2); |
| } |
| /** |
| * 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); |
| /* |
| * Feature in Motif. Motif does not optimize the case |
| * when the same text is set into a menu item causing |
| * it to flash. The fix is to test for equality and |
| * do nothing. |
| */ |
| if (text.equals (string)) return; |
| super.setText (string); |
| if ((style & (SWT.ARROW | SWT.SEPARATOR)) != 0) return; |
| |
| /* |
| * Bug in Linux. In certain contexts setting the label of a |
| * CHECK or RADIO menu item to the empty string can cause a |
| * GP. The fix is to set the menu label to a space in such |
| * cases since it displays equivalently. |
| */ |
| if (OS.IsLinux && (style & (SWT.CHECK | SWT.RADIO)) != 0) { |
| if (string.length () == 0) string = " "; |
| } |
| char [] text = new char [string.length ()]; |
| string.getChars (0, text.length, text, 0); |
| boolean accel = false; |
| int i=0, j=0, mnemonic=0; |
| while (i < text.length) { |
| if (text [i] == '\t') {accel = true; break;} |
| if ((text [j++] = text [i++]) == '&') { |
| if (i == text.length) {continue;} |
| if (text [i] == '&') {i++; continue;} |
| if (mnemonic == 0) mnemonic = text [i]; |
| j--; |
| } |
| } |
| int xmString2 = 0; |
| if (accel && ++i < text.length) { |
| char [] accelText = new char [text.length - i]; |
| System.arraycopy (text, i, accelText, 0, accelText.length); |
| /* Use the character encoding for the default locale */ |
| byte [] buffer2 = Converter.wcsToMbcs (null, accelText, true); |
| xmString2 = OS.XmStringParseText ( |
| buffer2, |
| 0, |
| OS.XmFONTLIST_DEFAULT_TAG, |
| OS.XmCHARSET_TEXT, |
| null, |
| 0, |
| 0); |
| if (xmString2 == 0) error (SWT.ERROR_CANNOT_SET_TEXT); |
| } else { |
| /* |
| * Bug in linux. In some versions of linux motif setting a menu item's |
| * accelerator to NULL will cause a GP. The workaround is to instead |
| * set these accelerators to a functionally equivalent non-null value. |
| */ |
| xmString2 = OS.XmStringGenerate (new byte[1], null, OS.XmCHARSET_TEXT, null); |
| if (xmString2 == 0) error (SWT.ERROR_CANNOT_SET_TEXT); |
| } |
| while (j < text.length) text [j++] = 0; |
| /* Use the character encoding for the default locale */ |
| byte [] buffer1 = Converter.wcsToMbcs (null, text, true); |
| int xmString1 = OS.XmStringParseText ( |
| buffer1, |
| 0, |
| OS.XmFONTLIST_DEFAULT_TAG, |
| OS.XmCHARSET_TEXT, |
| null, |
| 0, |
| 0); |
| if (xmString1 == 0) error (SWT.ERROR_CANNOT_SET_TEXT); |
| if (mnemonic == 0) mnemonic = OS.XK_VoidSymbol; |
| int [] argList = { |
| OS.XmNlabelString, xmString1, |
| OS.XmNmnemonic, mnemonic, |
| OS.XmNacceleratorText, xmString2, |
| }; |
| OS.XtSetValues (handle, argList, argList.length / 2); |
| if (xmString1 != 0) OS.XmStringFree (xmString1); |
| if (xmString2 != 0) OS.XmStringFree (xmString2); |
| } |
| boolean translateAccelerator (int accel, boolean doit) { |
| if (!getEnabled ()) return false; |
| if (menu != null) return menu.translateAccelerator (accel, doit); |
| int accelerator = this.accelerator; |
| if ((accelerator & SWT.KEYCODE_BIT) == 0) { |
| int key = accelerator & SWT.KEY_MASK; |
| if ('A' <= key && key <= 'Z') { |
| key += 'a' - 'A'; |
| } |
| int mods = accelerator & SWT.MODIFIER_MASK; |
| accelerator = mods | key; |
| } |
| if (accelerator == accel) { |
| if (doit) postEvent (SWT.Selection); |
| return true; |
| } |
| return false; |
| } |
| int XmNactivateCallback (int w, int client_data, int call_data) { |
| if ((style & SWT.CASCADE) != 0) { |
| sendEvent (SWT.Arm); |
| } |
| if (!isEnabled ()) return 0; |
| XmAnyCallbackStruct struct = new XmAnyCallbackStruct (); |
| OS.memmove (struct, call_data, XmAnyCallbackStruct.sizeof); |
| Event event = new Event (); |
| if (struct.event != 0) { |
| XButtonEvent xEvent = new XButtonEvent (); |
| OS.memmove (xEvent, struct.event, XButtonEvent.sizeof); |
| event.time = xEvent.time; |
| switch (xEvent.type) { |
| case OS.ButtonPress: |
| case OS.ButtonRelease: |
| case OS.KeyPress: |
| case OS.KeyRelease: |
| setInputState (event, xEvent.state); |
| break; |
| } |
| } |
| postEvent (SWT.Selection, event); |
| return 0; |
| } |
| int XmNarmCallback (int w, int client_data, int call_data) { |
| sendEvent (SWT.Arm); |
| return 0; |
| } |
| int XmNcascadingCallback (int w, int client_data, int call_data) { |
| /* |
| * Bug in Motif. When XmNlabelString is set as a result of |
| * an XmNcascadingCallback after the callback has returned, |
| * Motif measures the new string properly but does not draw |
| * it. The fix is to send rather than post the SWT.Arm event. |
| */ |
| sendEvent (SWT.Arm); |
| return 0; |
| } |
| int XmNhelpCallback (int w, int client_data, int call_data) { |
| if (hooks (SWT.Help)) { |
| postEvent (SWT.Help); |
| return 0; |
| } |
| parent.sendHelpEvent (call_data); |
| return 0; |
| } |
| int XmNvalueChangedCallback (int w, int client_data, int call_data) { |
| if (!isEnabled ()) return 0; |
| XmAnyCallbackStruct struct = new XmAnyCallbackStruct (); |
| OS.memmove (struct, call_data, XmAnyCallbackStruct.sizeof); |
| Event event = new Event (); |
| if (struct.event != 0) { |
| XButtonEvent xEvent = new XButtonEvent (); |
| OS.memmove (xEvent, struct.event, XButtonEvent.sizeof); |
| event.time = xEvent.time; |
| switch (xEvent.type) { |
| case OS.ButtonPress: |
| case OS.ButtonRelease: |
| case OS.KeyPress: |
| case OS.KeyRelease: |
| setInputState (event, xEvent.state); |
| break; |
| } |
| } |
| if ((style & SWT.RADIO) != 0) { |
| if ((parent.getStyle () & SWT.NO_RADIO_GROUP) == 0) { |
| selectRadio (); |
| } |
| } |
| postEvent (SWT.Selection, event); |
| return 0; |
| } |
| |
| } |