| /******************************************************************************* |
| * 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.motif.*; |
| import org.eclipse.swt.*; |
| import org.eclipse.swt.events.*; |
| import org.eclipse.swt.graphics.*; |
| |
| /** |
| * Instances of this class are user interface objects that contain |
| * menu items. |
| * <dl> |
| * <dt><b>Styles:</b></dt> |
| * <dd>BAR, DROP_DOWN, POP_UP, NO_RADIO_GROUP</dd> |
| * <dd>LEFT_TO_RIGHT, RIGHT_TO_LEFT</dd> |
| * <dt><b>Events:</b></dt> |
| * <dd>Help, Hide, Show </dd> |
| * </dl> |
| * <p> |
| * Note: Only one of BAR, DROP_DOWN and POP_UP may be specified. |
| * Only one of LEFT_TO_RIGHT or RIGHT_TO_LEFT may be specified. |
| * </p><p> |
| * IMPORTANT: This class is <em>not</em> intended to be subclassed. |
| * </p> |
| */ |
| public class Menu extends Widget { |
| boolean hasLocation; |
| MenuItem cascade, defaultItem; |
| Decorations parent; |
| /** |
| * Constructs a new instance of this class given its parent, |
| * and sets the style for the instance so that the instance |
| * will be a popup menu on the given parent's shell. |
| * |
| * @param parent a control which will be the parent of the new instance (cannot be null) |
| * |
| * @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#POP_UP |
| * @see Widget#checkSubclass |
| * @see Widget#getStyle |
| */ |
| public Menu (Control parent) { |
| this (checkNull(parent).menuShell (), SWT.POP_UP); |
| } |
| /** |
| * Constructs a new instance of this class given its parent |
| * (which must be a <code>Decorations</code>) 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 decorations control which will be the parent of the new instance (cannot be null) |
| * @param style the style of menu 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#BAR |
| * @see SWT#DROP_DOWN |
| * @see SWT#POP_UP |
| * @see Widget#checkSubclass |
| * @see Widget#getStyle |
| */ |
| public Menu (Decorations parent, int style) { |
| super (parent, checkStyle (style)); |
| this.parent = parent; |
| createWidget (0); |
| } |
| /** |
| * Constructs a new instance of this class given its parent |
| * (which must be a <code>Menu</code>) and sets the style |
| * for the instance so that the instance will be a drop-down |
| * menu on the given parent's parent. |
| * |
| * @param parentMenu a menu which will be the parent of the new instance (cannot be null) |
| * |
| * @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#DROP_DOWN |
| * @see Widget#checkSubclass |
| * @see Widget#getStyle |
| */ |
| public Menu (Menu parentMenu) { |
| this (checkNull(parentMenu).parent, SWT.DROP_DOWN); |
| } |
| /** |
| * Constructs a new instance of this class given its parent |
| * (which must be a <code>MenuItem</code>) and sets the style |
| * for the instance so that the instance will be a drop-down |
| * menu on the given parent's parent menu. |
| * |
| * @param parentItem a menu item which will be the parent of the new instance (cannot be null) |
| * |
| * @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#DROP_DOWN |
| * @see Widget#checkSubclass |
| * @see Widget#getStyle |
| */ |
| public Menu (MenuItem parentItem) { |
| this (checkNull(parentItem).parent); |
| } |
| void _setVisible (boolean visible) { |
| if ((style & (SWT.BAR | SWT.DROP_DOWN)) != 0) return; |
| if (visible) { |
| sendEvent (SWT.Show); |
| if (getItemCount () != 0) { |
| int xDisplay = OS.XtDisplay (handle); |
| if (xDisplay == 0) return; |
| int xWindow = OS.XDefaultRootWindow (xDisplay); |
| if (xWindow == 0) return; |
| int [] rootX = new int [1], rootY = new int [1], unused = new int [1], mask = new int [1]; |
| if (OS.XQueryPointer (xDisplay, xWindow, unused, unused, rootX, rootY, unused, unused, mask) == 0) { |
| return; |
| } |
| if (!hasLocation) { |
| /* |
| * Bug in Motif. For some reason, when a menu is popped up |
| * under the mouse, the menu will not highlight until the |
| * mouse exits and then enters the menu again. The fix is |
| * to pop the menu up outside the current mouse position |
| * causing highlighting to work properly when the user |
| * waits for the menu to appear. |
| */ |
| rootX[0] += 1; rootY[0] += 1; |
| int [] argList = {OS.XmNx, rootX [0], OS.XmNy, rootY [0]}; |
| OS.XtSetValues (handle, argList, argList.length / 2); |
| } |
| /* |
| * Feature in Motif. If an X grab is active, then |
| * the menu pops us but issues and error message an |
| * fails to grab the pointer. The fix is to ensure |
| * that no grab is active before showing the menu. |
| */ |
| OS.XUngrabPointer (xDisplay, OS.CurrentTime); |
| OS.XtManageChild (handle); |
| /* |
| * Feature in Motif. There is no API to force the menu |
| * to accept keyboard traversal when popped up using |
| * XtManageChild. The fix is to call undocumented API |
| * to do this. |
| */ |
| int flags = OS.Button1Mask | OS.Button2Mask | OS.Button3Mask; |
| if ((mask [0] & flags) == 0) OS._XmSetMenuTraversal (handle, true); |
| } else { |
| sendEvent (SWT.Hide); |
| } |
| } else { |
| OS.XtUnmanageChild (handle); |
| } |
| } |
| void addAccelerators () { |
| MenuItem [] items = getItems (); |
| for (int i = 0; i < items.length; i++) { |
| MenuItem item = items[i]; |
| item.addAccelerators (); |
| } |
| } |
| /** |
| * Adds the listener to the collection of listeners who will |
| * be notified when 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 menus are hidden or shown, by sending it |
| * one of the messages defined in the <code>MenuListener</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 MenuListener |
| * @see #removeMenuListener |
| */ |
| public void addMenuListener(MenuListener listener) { |
| checkWidget(); |
| if (listener == null) error (SWT.ERROR_NULL_ARGUMENT); |
| TypedListener typedListener = new TypedListener (listener); |
| addListener(SWT.Hide,typedListener); |
| addListener(SWT.Show,typedListener); |
| } |
| static int checkStyle (int style) { |
| return checkBits (style, SWT.POP_UP, SWT.BAR, SWT.DROP_DOWN, 0, 0, 0); |
| } |
| static Control checkNull (Control control) { |
| if (control == null) SWT.error (SWT.ERROR_NULL_ARGUMENT); |
| return control; |
| } |
| static Menu checkNull (Menu menu) { |
| if (menu == null) SWT.error (SWT.ERROR_NULL_ARGUMENT); |
| return menu; |
| } |
| static MenuItem checkNull (MenuItem item) { |
| if (item == null) SWT.error (SWT.ERROR_NULL_ARGUMENT); |
| return item; |
| } |
| void createHandle (int index) { |
| state |= HANDLE; |
| |
| /* |
| * Bug in Motif. For some reason, creating a menu after any application context |
| * and shell have been destroyed will segment fault unless a new application |
| * context and shell have been created in the current thread. The fix is to |
| * detect this case and create and destroy a temporary application context and |
| * shell. |
| */ |
| int xDisplay = 0, shellHandle = 0; |
| if (Display.DisplayDisposed) { |
| int [] argc = new int [] {0}; |
| int xtContext = OS.XtCreateApplicationContext (); |
| xDisplay = OS.XtOpenDisplay (xtContext, null, null, null, 0, 0, argc, 0); |
| shellHandle = OS.XtAppCreateShell (null, null, OS.topLevelShellWidgetClass (), xDisplay, null, 0); |
| } |
| |
| /* BAR menu */ |
| if ((style & SWT.BAR) != 0) { |
| int parentHandle = parent.scrolledHandle; |
| int [] argList = {OS.XmNancestorSensitive, 1}; |
| handle = OS.XmCreateMenuBar (parentHandle, null, argList, argList.length / 2); |
| if (handle == 0) error (SWT.ERROR_NO_HANDLES); |
| return; |
| } |
| |
| /* POPUP and PULLDOWN menus */ |
| |
| /* |
| * Bug in Motif. When an existing popup menu is destroyed just |
| * before creating a new popup menu and the new menu is managed, |
| * the cursor changes to the menu cursor but the new menu is not |
| * displayed. Also, Motif fails to show a popup menu when the |
| * mouse is released. Both problems stem from the fact that the |
| * popup menu is in the widget tree of a visible shell. The fix |
| * is to create all popup menus as children of a hidden dialog |
| * shell. Menus created this way are automatically destroyed |
| * when the shell is destroyed. |
| */ |
| byte [] buffer = new byte [1]; |
| int [] argList = {OS.XmNancestorSensitive, 1}; |
| if ((style & SWT.POP_UP) != 0) { |
| int parentHandle = parent.dialogHandle (); |
| handle = OS.XmCreatePopupMenu (parentHandle, buffer, argList, argList.length / 2); |
| } else { |
| /* |
| * Bug in Linux. For some reason, when the parent of the pulldown |
| * menu is not the main window handle, XtDestroyWidget() occasionally |
| * segment faults when the shell is destroyed. The fix is to ensure |
| * that the parent is the main window. |
| */ |
| int parentHandle = parent.scrolledHandle; |
| handle = OS.XmCreatePulldownMenu (parentHandle, buffer, argList, argList.length / 2); |
| } |
| if (handle == 0) error (SWT.ERROR_NO_HANDLES); |
| |
| /* Workaround for bug in Motif */ |
| if (Display.DisplayDisposed) { |
| if (shellHandle != 0) OS.XtDestroyWidget (shellHandle); |
| if (xDisplay != 0) { |
| int xtContext = OS.XtDisplayToApplicationContext (xDisplay); |
| OS.XtDestroyApplicationContext (xtContext); |
| } |
| } |
| } |
| void createWidget (int index) { |
| checkOrientation (parent); |
| super.createWidget (index); |
| parent.add (this); |
| } |
| /*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); |
| int x = argList [1], y = argList [3]; |
| if ((style & SWT.BAR) != 0) { |
| short [] root_x = new short [1], root_y = new short [1]; |
| OS.XtTranslateCoords (handle, (short) x, (short) x, root_x, root_y); |
| x = root_x [0]; |
| y = root_y [0]; |
| } |
| return new Rectangle (x, y, argList [5], argList [7]); |
| } |
| /** |
| * Returns the default menu item or null if none has |
| * been previously set. |
| * |
| * @return the default menu item. |
| * |
| * </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 MenuItem getDefaultItem () { |
| checkWidget(); |
| return defaultItem; |
| } |
| /** |
| * Returns <code>true</code> if the receiver is enabled, and |
| * <code>false</code> otherwise. A disabled menu 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 item at the given, zero-relative index in the |
| * receiver. Throws an exception if the index is out of range. |
| * |
| * @param index the index of the item to return |
| * @return the item at the given index |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the list minus 1 (inclusive)</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 MenuItem getItem (int index) { |
| checkWidget(); |
| int [] argList = {OS.XmNchildren, 0, OS.XmNnumChildren, 0}; |
| OS.XtGetValues (handle, argList, argList.length / 2); |
| if (argList [1] == 0) error (SWT.ERROR_CANNOT_GET_ITEM); |
| int [] handles = new int [argList [3]]; |
| OS.memmove (handles, argList [1], argList[3] * 4); |
| int i = 0, count = 0; |
| while (i < argList [3]) { |
| if (OS.XtIsManaged (handles [i])) { |
| if (index == count) break; |
| count++; |
| } |
| i++; |
| } |
| if (index != count) error (SWT.ERROR_INVALID_RANGE); |
| Widget widget = display.getWidget (handles [i]); |
| if (!(widget instanceof MenuItem)) error (SWT.ERROR_CANNOT_GET_ITEM); |
| return (MenuItem) widget; |
| } |
| /** |
| * Returns the number of items contained in the receiver. |
| * |
| * @return the number of items |
| * |
| * @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 getItemCount () { |
| checkWidget(); |
| int [] argList = {OS.XmNchildren, 0, OS.XmNnumChildren, 0}; |
| OS.XtGetValues (handle, argList, argList.length / 2); |
| if (argList [1] == 0 || argList [3] == 0) return 0; |
| int [] handles = new int [argList [3]]; |
| OS.memmove (handles, argList [1], argList [3] * 4); |
| int count = 0; |
| for (int i=0; i<argList [3]; i++) { |
| if (OS.XtIsManaged (handles [i])) count++; |
| } |
| return count; |
| } |
| /** |
| * Returns a (possibly empty) array of <code>MenuItem</code>s which |
| * are the items in the receiver. |
| * <p> |
| * Note: This is not the actual structure used by the receiver |
| * to maintain its list of items, so modifying the array will |
| * not affect the receiver. |
| * </p> |
| * |
| * @return the items in the receiver |
| * |
| * @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 MenuItem [] getItems () { |
| checkWidget(); |
| int [] argList = {OS.XmNchildren, 0, OS.XmNnumChildren, 0}; |
| OS.XtGetValues (handle, argList, argList.length / 2); |
| int ptr = argList [1], count = argList [3]; |
| if (count == 0 || ptr == 0) return new MenuItem [0]; |
| int [] handles = new int [count]; |
| OS.memmove (handles, ptr, count * 4); |
| MenuItem [] items = new MenuItem [count]; |
| int i = 0, j = 0; |
| while (i < count) { |
| Widget item = display.getWidget (handles [i]); |
| if (item != null) items [j++] = (MenuItem) item; |
| i++; |
| } |
| if (i == j) return items; |
| MenuItem [] newItems = new MenuItem [j]; |
| System.arraycopy (items, 0, newItems, 0, j); |
| return newItems; |
| } |
| String getNameText () { |
| String result = ""; |
| MenuItem [] items = getItems (); |
| int length = items.length; |
| if (length > 0) { |
| for (int i=0; i<length-1; i++) { |
| result = result + items [i].getNameText() + ", "; |
| } |
| result = result + items [length-1].getNameText (); |
| } |
| return result; |
| } |
| /** |
| * Returns the receiver's parent, which must be a <code>Decorations</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 Decorations getParent () { |
| checkWidget(); |
| return parent; |
| } |
| /** |
| * Returns the receiver's parent item, which must be a |
| * <code>MenuItem</code> or null when the receiver is a |
| * root. |
| * |
| * @return the receiver's parent item |
| * |
| * @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 MenuItem getParentItem () { |
| checkWidget(); |
| return cascade; |
| } |
| /** |
| * Returns the receiver's parent item, which must be a |
| * <code>Menu</code> or null when the receiver is a |
| * root. |
| * |
| * @return the receiver's parent item |
| * |
| * @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 getParentMenu () { |
| checkWidget(); |
| if (cascade != null) return cascade.parent; |
| return null; |
| } |
| /** |
| * Returns the receiver's shell. For all controls other than |
| * shells, this simply returns the control's nearest ancestor |
| * shell. Shells return themselves, even if they are children |
| * of other shells. |
| * |
| * @return the receiver's shell |
| * |
| * @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 #getParent |
| */ |
| public Shell getShell () { |
| checkWidget(); |
| return parent.getShell (); |
| } |
| /** |
| * Returns <code>true</code> if the receiver is visible, and |
| * <code>false</code> otherwise. |
| * <p> |
| * If one of the receiver's ancestors is not visible or some |
| * other condition makes the receiver not visible, this method |
| * may still indicate that it is considered visible even though |
| * it may not actually be showing. |
| * </p> |
| * |
| * @return the receiver's visibility 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 getVisible () { |
| checkWidget(); |
| if ((style & SWT.POP_UP) != 0) { |
| Menu [] popups = display.popups; |
| if (popups != null) { |
| for (int i=0; i<popups.length; i++) { |
| if (popups [i] == this) return true; |
| } |
| } |
| } |
| return OS.XtIsManaged (handle); |
| } |
| void hookEvents () { |
| int windowProc = display.windowProc; |
| OS.XtAddCallback (handle, OS.XmNhelpCallback, windowProc, HELP_CALLBACK); |
| OS.XtAddCallback (handle, OS.XmNmapCallback, windowProc, MAP_CALLBACK); |
| OS.XtAddCallback (handle, OS.XmNunmapCallback, windowProc, UNMAP_CALLBACK); |
| } |
| /** |
| * Searches the receiver's list starting at the first item |
| * (index 0) until an item is found that is equal to the |
| * argument, and returns the index of that item. If no item |
| * is found, returns -1. |
| * |
| * @param item the search item |
| * @return the index of the item |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the string 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> |
| */ |
| public int indexOf (MenuItem item) { |
| checkWidget(); |
| int [] argList = {OS.XmNchildren, 0, OS.XmNnumChildren, 0}; |
| OS.XtGetValues (handle, argList, argList.length / 2); |
| int [] handles = new int [argList [3]]; |
| OS.memmove (handles, argList [1], handles.length * 4); |
| int index = 0; |
| for (int i=0; i<handles.length; i++) { |
| if (OS.XtIsManaged (handles [i])) { |
| if (handles [i] == item.handle) return index; |
| index++; |
| } |
| } |
| return -1; |
| } |
| /** |
| * 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 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 () { |
| checkWidget(); |
| Menu parentMenu = getParentMenu (); |
| if (parentMenu == null) return getEnabled (); |
| return getEnabled () && parentMenu.isEnabled (); |
| } |
| /** |
| * Returns <code>true</code> if the receiver is visible and all |
| * of the receiver's ancestors are visible and <code>false</code> |
| * otherwise. |
| * |
| * @return the receiver's visibility 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 #getVisible |
| */ |
| public boolean isVisible () { |
| checkWidget(); |
| return getVisible (); |
| } |
| void releaseChild () { |
| super.releaseChild (); |
| if (cascade != null) cascade.setMenu (null); |
| if ((style & SWT.BAR) != 0 && this == parent.menuBar) parent.setMenuBar (null); |
| } |
| void releaseWidget () { |
| MenuItem [] items = getItems (); |
| for (int i=0; i<items.length; i++) { |
| MenuItem item = items [i]; |
| if (!item.isDisposed ()) item.releaseResources (); |
| } |
| super.releaseWidget (); |
| if (parent != null) parent.remove (this); |
| parent = null; |
| cascade = defaultItem = null; |
| } |
| void removeAccelerators () { |
| MenuItem [] items = getItems (); |
| for (int i = 0; i < items.length; i++) { |
| MenuItem item = items[i]; |
| item.removeAccelerators (); |
| } |
| } |
| /** |
| * 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 menu 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 MenuListener |
| * @see #addMenuListener |
| */ |
| public void removeMenuListener(MenuListener listener) { |
| checkWidget(); |
| if (listener == null) error (SWT.ERROR_NULL_ARGUMENT); |
| if (eventTable == null) return; |
| eventTable.unhook(SWT.Hide, listener); |
| eventTable.unhook(SWT.Show, listener); |
| } |
| void sendHelpEvent (int callData) { |
| if (hooks (SWT.Help)) { |
| postEvent (SWT.Help); |
| return; |
| } |
| parent.sendHelpEvent (callData); |
| } |
| /** |
| * Sets the default menu item to the argument or removes |
| * the default emphasis when the argument is <code>null</code>. |
| * |
| * @param item the default menu item or null |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_ARGUMENT - if the menu item has been disposed</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 setDefaultItem (MenuItem item) { |
| checkWidget(); |
| if (item != null && item.isDisposed()) error(SWT.ERROR_INVALID_ARGUMENT); |
| defaultItem = item; |
| } |
| /** |
| * Enables the receiver if the argument is <code>true</code>, |
| * and disables it otherwise. A disabled menu 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 [] argList = {OS.XmNsensitive, enabled ? 1 : 0}; |
| OS.XtSetValues (handle, argList, argList.length / 2); |
| } |
| /** |
| * Sets the location of the receiver, which must be a popup, |
| * to the point specified by the arguments which are relative |
| * to the display. |
| * <p> |
| * Note that this is different from most widgets where the |
| * location of the widget is relative to the parent. |
| * </p><p> |
| * Note that the platform window manager ultimately has control |
| * over the location of popup menus. |
| * </p> |
| * |
| * @param x the new x coordinate for the receiver |
| * @param y the new y coordinate for the receiver |
| * |
| * @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 setLocation (int x, int y) { |
| checkWidget(); |
| if ((style & (SWT.BAR | SWT.DROP_DOWN)) != 0) return; |
| int [] argList = {OS.XmNx, x, OS.XmNy, y}; |
| OS.XtSetValues (handle, argList, argList.length / 2); |
| hasLocation = true; |
| } |
| /** |
| * Sets the location of the receiver, which must be a popup, |
| * to the point specified by the argument which is relative |
| * to the display. |
| * <p> |
| * Note that this is different from most widgets where the |
| * location of the widget is relative to the parent. |
| * </p><p> |
| * Note that the platform window manager ultimately has control |
| * over the location of popup menus. |
| * </p> |
| * |
| * @param location the new location for the receiver |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the point 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> |
| * |
| * @since 2.1 |
| */ |
| public void setLocation (Point location) { |
| checkWidget(); |
| if (location == null) error (SWT.ERROR_NULL_ARGUMENT); |
| setLocation (location.x, location.y); |
| } |
| /** |
| * Marks the receiver as visible if the argument is <code>true</code>, |
| * and marks it invisible otherwise. |
| * <p> |
| * If one of the receiver's ancestors is not visible or some |
| * other condition makes the receiver not visible, marking |
| * it visible may not actually cause it to be displayed. |
| * </p> |
| * |
| * @param visible the new visibility 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 setVisible (boolean visible) { |
| checkWidget(); |
| if ((style & (SWT.BAR | SWT.DROP_DOWN)) != 0) return; |
| if (visible) { |
| display.addPopup (this); |
| } else { |
| display.removePopup (this); |
| _setVisible (false); |
| } |
| } |
| boolean translateAccelerator (int accel, boolean doit) { |
| if (!getEnabled ()) return false; |
| MenuItem [] items = getItems (); |
| for (int i = 0; i < items.length; i++) { |
| MenuItem item = items [i]; |
| if (item.translateAccelerator (accel, doit)) return true; |
| } |
| return false; |
| } |
| int XmNhelpCallback (int w, int client_data, int call_data) { |
| sendHelpEvent (call_data); |
| return 0; |
| } |
| int XmNmapCallback (int w, int client_data, int call_data) { |
| if ((style & SWT.POP_UP) != 0) return 0; |
| sendEvent (SWT.Show); |
| return 0; |
| } |
| int XmNunmapCallback (int w, int client_data, int call_data) { |
| sendEvent (SWT.Hide); |
| return 0; |
| } |
| } |