| /******************************************************************************* |
| * Copyright (c) 2000, 2003 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Common Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/cpl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.swt.widgets; |
| |
| |
| import org.eclipse.swt.*; |
| import org.eclipse.swt.internal.*; |
| import org.eclipse.swt.internal.gtk.*; |
| 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 { |
| Menu parent, menu; |
| int accelerator; |
| |
| /** |
| * 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 (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; |
| int count = parent.getItemCount (); |
| if (!(0 <= index && index <= count)) { |
| error (SWT.ERROR_INVALID_RANGE); |
| } |
| createWidget (index); |
| } |
| |
| void addAccelerator (int /*long*/ accelGroup) { |
| updateAccelerator (accelGroup, true); |
| } |
| |
| void addAccelerators (int /*long*/ accelGroup) { |
| addAccelerator (accelGroup); |
| if (menu != null) menu.addAccelerators (accelGroup); |
| } |
| |
| /** |
| * 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 control 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); |
| } |
| |
| void createHandle (int index) { |
| state |= HANDLE; |
| byte [] buffer = new byte [1]; |
| int bits = SWT.CHECK | SWT.RADIO | SWT.PUSH | SWT.SEPARATOR; |
| switch (style & bits) { |
| case SWT.SEPARATOR: |
| handle = OS.gtk_separator_menu_item_new (); |
| break; |
| case SWT.RADIO: |
| /* |
| * This code is intentionally commented. Because GTK |
| * enforces radio behavior in a button group a radio group |
| * is not created for each set of contiguous buttons, each |
| * radio button will not draw unpressed. The fix is to use |
| * toggle buttons instead. |
| */ |
| // handle = OS.gtk_radio_menu_item_new_with_label (0, buffer); |
| // break; |
| case SWT.CHECK: |
| handle = OS.gtk_check_menu_item_new_with_label (buffer); |
| break; |
| case SWT.PUSH: |
| default: |
| handle = OS.gtk_image_menu_item_new_with_label (buffer); |
| break; |
| } |
| if (handle == 0) error (SWT.ERROR_NO_HANDLES); |
| if ((style & SWT.SEPARATOR) == 0) { |
| int /*long*/ label = OS.gtk_bin_get_child (handle); |
| OS.gtk_accel_label_set_accel_widget (label, 0); |
| } |
| int /*long*/ parentHandle = parent.handle; |
| boolean enabled = OS.GTK_WIDGET_SENSITIVE (parentHandle); |
| if (!enabled) OS.GTK_WIDGET_SET_FLAGS (parentHandle, OS.GTK_SENSITIVE); |
| OS.gtk_menu_shell_insert (parentHandle, handle, index); |
| if (!enabled) OS.GTK_WIDGET_UNSET_FLAGS (parentHandle, OS.GTK_SENSITIVE); |
| OS.gtk_widget_show (handle); |
| } |
| |
| void fixMenus (Decorations newParent) { |
| if (menu != null) menu.fixMenus (newParent); |
| } |
| |
| /** |
| * Return 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>. |
| * |
| * @return the accelerator |
| * |
| * </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; |
| } |
| |
| int /*long*/ getAccelGroup () { |
| Menu menu = parent; |
| while (menu != null && menu.cascade != null) { |
| menu = menu.cascade.parent; |
| } |
| Decorations shell = menu.parent; |
| return shell.menuBar == menu ? shell.accelGroup : 0; |
| } |
| |
| /** |
| * Returns <code>true</code> if the receiver is enabled, and |
| * <code>false</code> otherwise. A disabled control 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 OS.GTK_WIDGET_SENSITIVE (handle); |
| } |
| |
| /** |
| * 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; |
| } |
| |
| /** |
| * 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; |
| return OS.gtk_check_menu_item_get_active(handle); |
| } |
| |
| int /*long*/ gtk_activate (int /*long*/ widget) { |
| if ((style & SWT.CASCADE) != 0 && menu != null) return 0; |
| /* |
| * Bug in GTK. When an ancestor menu is disabled and |
| * the user types an accelerator key, GTK delivers the |
| * the activate signal even though the menu item cannot |
| * be invoked using the mouse. The fix is to ignore activate |
| * signals when an ancestor menu is disabled. |
| */ |
| if (!isEnabled ()) return 0; |
| Event event = new Event (); |
| int /*long*/ ptr = OS.gtk_get_current_event (); |
| if (ptr != 0) { |
| GdkEvent gdkEvent = new GdkEvent (); |
| OS.memmove (gdkEvent, ptr, GdkEvent.sizeof); |
| switch (gdkEvent.type) { |
| case OS.GDK_KEY_PRESS: |
| case OS.GDK_KEY_RELEASE: |
| case OS.GDK_BUTTON_PRESS: |
| case OS.GDK_2BUTTON_PRESS: |
| case OS.GDK_BUTTON_RELEASE: { |
| int [] state = new int [1]; |
| OS.gdk_event_get_state (ptr, state); |
| setInputState (event, state [0]); |
| break; |
| } |
| } |
| OS.gdk_event_free (ptr); |
| } |
| if ((style & SWT.RADIO) != 0) { |
| if ((parent.getStyle () & SWT.NO_RADIO_GROUP) == 0) { |
| selectRadio (); |
| } |
| } |
| postEvent (SWT.Selection, event); |
| return 0; |
| } |
| |
| int /*long*/ gtk_select (int /*long*/ item) { |
| parent.selectedItem = this; |
| postEvent (SWT.Arm); |
| return 0; |
| } |
| |
| int /*long*/ gtk_show_help (int /*long*/ widget, int /*long*/ helpType) { |
| boolean handled = hooks (SWT.Help); |
| if (handled) { |
| postEvent (SWT.Help); |
| } else { |
| handled = parent.sendHelpEvent (helpType); |
| } |
| if (handled) { |
| OS.gtk_menu_shell_deactivate (parent.handle); |
| return 1; |
| } |
| return 0; |
| } |
| |
| void hookEvents () { |
| super.hookEvents (); |
| int /*long*/ windowProc2 = display.windowProc2; |
| int /*long*/ windowProc3 = display.windowProc3; |
| OS.g_signal_connect (handle, OS.activate, windowProc2, ACTIVATE); |
| OS.g_signal_connect (handle, OS.select, windowProc2, SELECT); |
| OS.g_signal_connect (handle, OS.show_help, windowProc3, SHOW_HELP); |
| } |
| |
| /** |
| * 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 control 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 (); |
| } |
| |
| void releaseChild () { |
| super.releaseChild (); |
| if (menu != null) { |
| if (menu.selectedItem == this) menu.selectedItem = null; |
| menu.dispose (); |
| } |
| menu = null; |
| } |
| |
| void releaseWidget () { |
| if (menu != null) menu.releaseResources (); |
| menu = null; |
| super.releaseWidget (); |
| int /*long*/ accelGroup = getAccelGroup (); |
| if (accelGroup != 0) removeAccelerator (accelGroup); |
| accelerator = 0; |
| parent = null; |
| } |
| |
| void removeAccelerator (int /*long*/ accelGroup) { |
| updateAccelerator (accelGroup, false); |
| } |
| |
| void removeAccelerators (int /*long*/ accelGroup) { |
| removeAccelerator (accelGroup); |
| if (menu != null) menu.removeAccelerators (accelGroup); |
| } |
| |
| /** |
| * 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 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 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 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>. |
| * |
| * @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; |
| int /*long*/ accelGroup = getAccelGroup (); |
| if (accelGroup != 0) removeAccelerator (accelGroup); |
| this.accelerator = accelerator; |
| if (accelGroup != 0) addAccelerator (accelGroup); |
| } |
| |
| /** |
| * Enables the receiver if the argument is <code>true</code>, |
| * and disables it otherwise. A disabled control 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 (OS.GTK_WIDGET_SENSITIVE (handle) == enabled) return; |
| int /*long*/ accelGroup = getAccelGroup (); |
| if (accelGroup != 0) removeAccelerator (accelGroup); |
| OS.gtk_widget_set_sensitive (handle, enabled); |
| if (accelGroup != 0) addAccelerator (accelGroup); |
| } |
| |
| /** |
| * Sets the image the receiver will display to the argument. |
| * <p> |
| * Note: This feature is not available on all window systems (for example, Window NT), |
| * in which case, calling this method will silently do nothing. |
| * |
| * @param menu 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; |
| super.setImage (image); |
| if (!OS.GTK_IS_IMAGE_MENU_ITEM (handle)) return; |
| if (image != null) { |
| int /*long*/ imageHandle = OS.gtk_image_new_from_pixmap (image.pixmap, image.mask); |
| OS.gtk_image_menu_item_set_image (handle, imageHandle); |
| OS.gtk_widget_show (imageHandle); |
| } else { |
| OS.gtk_image_menu_item_set_image (handle, 0); |
| } |
| } |
| |
| /** |
| * 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.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; |
| int /*long*/ accelGroup = getAccelGroup (); |
| if (accelGroup != 0) removeAccelerators (accelGroup); |
| if (oldMenu != null) { |
| oldMenu.cascade = null; |
| /* |
| * Add a reference to the menu we are about |
| * to replace or GTK will destroy it. |
| */ |
| OS.g_object_ref (oldMenu.handle); |
| OS.gtk_menu_item_remove_submenu (handle); |
| } |
| if ((this.menu = menu) != null) { |
| menu.cascade = this; |
| OS.gtk_menu_item_set_submenu (handle, menu.handle); |
| } |
| if (accelGroup != 0) addAccelerators (accelGroup); |
| } |
| |
| 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; |
| OS.g_signal_handlers_block_matched (handle, OS.G_SIGNAL_MATCH_DATA, 0, 0, 0, 0, ACTIVATE); |
| OS.gtk_check_menu_item_set_active (handle, selected); |
| OS.g_signal_handlers_unblock_matched (handle, OS.G_SIGNAL_MATCH_DATA, 0, 0, 0, 0, ACTIVATE); |
| } |
| |
| /** |
| * 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; |
| super.setText (string); |
| String accelString = ""; |
| int index = string.indexOf ('\t'); |
| if (index != -1) { |
| accelString = string.substring (index, string.length()); |
| string = string.substring (0, index); |
| } |
| char [] chars = fixMnemonic (string); |
| byte [] buffer = Converter.wcsToMbcs (null, chars, true); |
| int /*long*/ label = OS.gtk_bin_get_child (handle); |
| OS.gtk_label_set_text_with_mnemonic (label, buffer); |
| buffer = Converter.wcsToMbcs (null, accelString, true); |
| int /*long*/ ptr = OS.g_malloc (buffer.length); |
| OS.memmove (ptr, buffer, buffer.length); |
| int /*long*/ oldPtr = OS.GTK_ACCEL_LABEL_GET_ACCEL_STRING (label); |
| OS.GTK_ACCEL_LABEL_SET_ACCEL_STRING (label, ptr); |
| if (oldPtr != 0) OS.g_free (oldPtr); |
| } |
| |
| void updateAccelerator (int /*long*/ accelGroup, boolean add) { |
| if (accelerator == 0 || !getEnabled ()) return; |
| int mask = 0; |
| if ((accelerator & SWT.ALT) != 0) mask |= OS.GDK_MOD1_MASK; |
| if ((accelerator & SWT.SHIFT) != 0) mask |= OS.GDK_SHIFT_MASK; |
| if ((accelerator & SWT.CONTROL) != 0) mask |= OS.GDK_CONTROL_MASK; |
| int keysym = accelerator & SWT.KEY_MASK; |
| int newKey = Display.untranslateKey (keysym); |
| if (newKey != 0) { |
| keysym = newKey; |
| } else { |
| switch (keysym) { |
| case '\r': keysym = OS.GDK_Return; break; |
| default: keysym = Display.wcsToMbcs ((char) keysym); |
| } |
| } |
| if (add) { |
| OS.gtk_widget_add_accelerator (handle, OS.activate, accelGroup, keysym, mask, OS.GTK_ACCEL_VISIBLE); |
| } else { |
| OS.gtk_widget_remove_accelerator (handle, accelGroup, keysym, mask); |
| } |
| } |
| } |