/*******************************************************************************
* Copyright (c) 2000, 2013 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.gtk.*;
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.
*
* - Styles:
* - BAR, DROP_DOWN, POP_UP, NO_RADIO_GROUP
* - LEFT_TO_RIGHT, RIGHT_TO_LEFT
* - Events:
* - Help, Hide, Show
*
*
* 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.
*
* IMPORTANT: This class is not intended to be subclassed.
*
*
* @see Menu snippets
* @see SWT Example: ControlExample
* @see Sample code and further information
* @noextend This class is not intended to be subclassed by clients.
*/
public class Menu extends Widget {
int x, y;
boolean hasLocation;
MenuItem cascade, selectedItem;
Decorations parent;
long /*int*/ imItem, imSeparator, imHandle;
ImageList imageList;
/**
* 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.
*
* After constructing a menu, it can be set into its parent
* using parent.setMenu(menu)
. In this case, the parent may
* be any control in the same widget tree as the parent.
*
*
* @param parent a control which will be the parent of the new instance (cannot be null)
*
* @exception IllegalArgumentException
* - ERROR_NULL_ARGUMENT - if the parent is null
*
* @exception SWTException
* - ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent
* - ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass
*
*
* @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 Decorations
) and a style value
* describing its behavior and appearance.
*
* The style value is either one of the style constants defined in
* class SWT
which is applicable to instances of this
* class, or must be built by bitwise OR'ing together
* (that is, using the int
"|" operator) two or more
* of those SWT
style constants. The class description
* lists the style constants that are applicable to the class.
* Style bits are also inherited from superclasses.
*
* After constructing a menu or menuBar, it can be set into its parent
* using parent.setMenu(menu)
or parent.setMenuBar(menuBar)
.
*
*
* @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
* - ERROR_NULL_ARGUMENT - if the parent is null
*
* @exception SWTException
* - ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent
* - ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass
*
*
* @see SWT#BAR
* @see SWT#DROP_DOWN
* @see SWT#POP_UP
* @see SWT#NO_RADIO_GROUP
* @see SWT#LEFT_TO_RIGHT
* @see SWT#RIGHT_TO_LEFT
* @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 Menu
) and sets the style
* for the instance so that the instance will be a drop-down
* menu on the given parent's parent.
*
* After constructing a drop-down menu, it can be set into its parentMenu
* using parentMenu.setMenu(menu)
.
*
*
* @param parentMenu a menu which will be the parent of the new instance (cannot be null)
*
* @exception IllegalArgumentException
* - ERROR_NULL_ARGUMENT - if the parent is null
*
* @exception SWTException
* - ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent
* - ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass
*
*
* @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 MenuItem
) and sets the style
* for the instance so that the instance will be a drop-down
* menu on the given parent's parent menu.
*
* After constructing a drop-down menu, it can be set into its parentItem
* using parentItem.setMenu(menu)
.
*
*
* @param parentItem a menu item which will be the parent of the new instance (cannot be null)
*
* @exception IllegalArgumentException
* - ERROR_NULL_ARGUMENT - if the parent is null
*
* @exception SWTException
* - ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent
* - ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass
*
*
* @see SWT#DROP_DOWN
* @see Widget#checkSubclass
* @see Widget#getStyle
*/
public Menu (MenuItem parentItem) {
this (checkNull (parentItem).parent);
}
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;
}
static int checkStyle (int style) {
return checkBits (style, SWT.POP_UP, SWT.BAR, SWT.DROP_DOWN, 0, 0, 0);
}
void _setVisible (boolean visible) {
if (visible == gtk_widget_get_mapped (handle)) return;
if (visible) {
sendEvent (SWT.Show);
if (getItemCount () != 0) {
if ((OS.GTK_VERSION >= OS.VERSION (2, 8, 0))) {
/*
* Feature in GTK. ON_TOP shells will send out
* SWT.Deactivate whenever a context menu is shown.
* The fix is to prevent the menu from taking focus
* when it is being shown in an ON_TOP shell.
*/
if ((parent._getShell ().style & SWT.ON_TOP) != 0) {
OS.gtk_menu_shell_set_take_focus (handle, false);
}
}
long /*int*/ address = hasLocation ? display.menuPositionProc: 0;
hasLocation = false;
long /*int*/ data = 0;
if ((OS.GTK_VERSION >= OS.VERSION (2, 10, 0))) {
/*
* Popup-menu to the status icon should be aligned to
* Tray rather than to cursor position. There is a
* possibility (unlikely) that TrayItem might have
* been disposed in the listener, for which case
* the menu should be shown in the cursor position.
*/
TrayItem item = display.currentTrayItem;
if (item != null && !item.isDisposed()) {
data = item.handle;
address = OS.gtk_status_icon_position_menu_func ();
}
}
/*
* Bug in GTK. The timestamp passed into gtk_menu_popup is used
* to perform an X pointer grab. It cannot be zero, else the grab
* will fail. The fix is to ensure that the timestamp of the last
* event processed is used.
*/
OS.gtk_menu_popup (handle, 0, 0, address, data, 0, display.getLastEventTime ());
} else {
sendEvent (SWT.Hide);
}
} else {
OS.gtk_menu_popdown (handle);
}
}
void addAccelerators (long /*int*/ accelGroup) {
MenuItem [] items = getItems ();
for (int i = 0; i < items.length; i++) {
MenuItem item = items[i];
item.addAccelerators (accelGroup);
}
}
/**
* 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 MenuListener
* interface.
*
* @param listener the listener which should be notified
*
* @exception IllegalArgumentException
* - ERROR_NULL_ARGUMENT - if the listener is null
*
* @exception SWTException
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
*
*
* @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);
}
/**
* 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
* HelpListener
interface.
*
* @param listener the listener which should be notified
*
* @exception IllegalArgumentException
* - ERROR_NULL_ARGUMENT - if the listener is null
*
* @exception SWTException
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
*
*
* @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);
}
void createHandle (int index) {
state |= HANDLE;
if ((style & SWT.BAR) != 0) {
handle = OS.gtk_menu_bar_new ();
if (handle == 0) error (SWT.ERROR_NO_HANDLES);
long /*int*/ vboxHandle = parent.vboxHandle;
OS.gtk_container_add (vboxHandle, handle);
OS.gtk_box_set_child_packing (vboxHandle, handle, false, true, 0, OS.GTK_PACK_START);
} else {
handle = OS.gtk_menu_new ();
if (handle == 0) error (SWT.ERROR_NO_HANDLES);
}
}
void createIMMenu (long /*int*/ imHandle) {
boolean showInputMethod = false;
long /*int*/ settings = OS.gtk_settings_get_default ();
if (settings != 0) {
int [] buffer = new int [1];
OS.g_object_get (settings, OS.gtk_show_input_method_menu, buffer, 0);
showInputMethod = buffer[0] != 0;
}
if (imHandle == 0 || !showInputMethod) {
this.imHandle = 0;
if (imItem != 0) {
OS.gtk_widget_destroy (imItem);
imItem = 0;
}
if (imSeparator != 0) {
OS.gtk_widget_destroy (imSeparator);
imSeparator = 0;
}
return;
}
if (this.imHandle == imHandle) return;
this.imHandle = imHandle;
if (imSeparator == 0) {
imSeparator = OS.gtk_separator_menu_item_new ();
OS.gtk_widget_show (imSeparator);
OS.gtk_menu_shell_insert (handle, imSeparator, -1);
}
if (imItem == 0) {
byte[] buffer = Converter.wcsToMbcs (null, SWT.getMessage("SWT_InputMethods"), true);
imItem = OS.gtk_image_menu_item_new_with_label (buffer);
OS.gtk_widget_show (imItem);
OS.gtk_menu_shell_insert (handle, imItem, -1);
}
long /*int*/ imSubmenu = OS.gtk_menu_new ();
OS.gtk_im_multicontext_append_menuitems (imHandle, imSubmenu);
OS.gtk_menu_item_set_submenu (imItem, imSubmenu);
}
void createWidget (int index) {
checkOrientation (parent);
super.createWidget (index);
parent.addMenu (this);
}
void fixMenus (Decorations newParent) {
MenuItem [] items = getItems ();
for (int i=0; i
* @exception SWTException
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
*
*/
public MenuItem getDefaultItem () {
checkWidget();
return null;
}
/**
* Returns true
if the receiver is enabled, and
* false
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
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
*
*
* @see #isEnabled
*/
public boolean getEnabled () {
checkWidget();
return gtk_widget_get_sensitive (handle);
}
/**
* 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
* - ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the list minus 1 (inclusive)
*
* @exception SWTException
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
*
*/
public MenuItem getItem (int index) {
checkWidget();
long /*int*/ list = OS.gtk_container_get_children (handle);
if (list == 0) error (SWT.ERROR_CANNOT_GET_ITEM);
int count = OS.g_list_length (list);
if (imSeparator != 0) count--;
if (imItem != 0) count--;
if (!(0 <= index && index < count)) error (SWT.ERROR_INVALID_RANGE);
long /*int*/ data = OS.g_list_nth_data (list, index);
OS.g_list_free (list);
if (data == 0) error (SWT.ERROR_CANNOT_GET_ITEM);
return (MenuItem) display.getWidget (data);
}
/**
* Returns the number of items contained in the receiver.
*
* @return the number of items
*
* @exception SWTException
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
*
*/
public int getItemCount () {
checkWidget();
long /*int*/ list = OS.gtk_container_get_children (handle);
if (list == 0) return 0;
int count = OS.g_list_length (list);
OS.g_list_free (list);
if (imSeparator != 0) count--;
if (imItem != 0) count--;
return count;
}
/**
* Returns a (possibly empty) array of MenuItem
s which
* are the items in the receiver.
*
* 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.
*
*
* @return the items in the receiver
*
* @exception SWTException
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
*
*/
public MenuItem [] getItems () {
checkWidget();
long /*int*/ list = OS.gtk_container_get_children (handle);
if (list == 0) return new MenuItem [0];
int count = OS.g_list_length (list);
if (imSeparator != 0) count--;
if (imItem != 0) count--;
MenuItem [] items = new MenuItem [count];
int index = 0;
for (int i=0; i 0) {
for (int i=0; iSWT.LEFT_TO_RIGHT or SWT.RIGHT_TO_LEFT
.
*
* @return the orientation style
*
* @exception SWTException
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
*
*
* @since 3.7
*/
public int getOrientation () {
checkWidget();
return style & (SWT.LEFT_TO_RIGHT | SWT.RIGHT_TO_LEFT);
}
/**
* Returns the receiver's parent, which must be a Decorations
.
*
* @return the receiver's parent
*
* @exception SWTException
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
*
*/
public Decorations getParent () {
checkWidget();
return parent;
}
/**
* Returns the receiver's parent item, which must be a
* MenuItem
or null when the receiver is a
* root.
*
* @return the receiver's parent item
*
* @exception SWTException
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
*
*/
public MenuItem getParentItem () {
checkWidget();
return cascade;
}
/**
* Returns the receiver's parent item, which must be a
* Menu
or null when the receiver is a
* root.
*
* @return the receiver's parent item
*
* @exception SWTException
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
*
*/
public Menu getParentMenu () {
checkWidget();
if (cascade == null) return null;
return cascade.getParent ();
}
/**
* 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
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
*
*
* @see #getParent
*/
public Shell getShell () {
checkWidget();
return parent.getShell ();
}
/**
* Returns true
if the receiver is visible, and
* false
otherwise.
*
* 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.
*
*
* @return the receiver's visibility state
*
* @exception SWTException
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
*
*/
public boolean getVisible () {
checkWidget();
if ((style & SWT.POP_UP) != 0) {
Menu [] popups = display.popups;
if (popups != null) {
for (int i=0; i
* ERROR_NULL_ARGUMENT - if the item is null
*
* @exception SWTException
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
*
*/
public int indexOf (MenuItem item) {
checkWidget();
if (item == null) error (SWT.ERROR_NULL_ARGUMENT);
MenuItem [] items = getItems ();
for (int i=0; itrue if the receiver is enabled and all
* of the receiver's ancestors are enabled, and false
* 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
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
*
*
* @see #getEnabled
*/
public boolean isEnabled () {
checkWidget();
Menu parentMenu = getParentMenu ();
if (parentMenu == null) {
return getEnabled () && parent.isEnabled ();
}
return getEnabled () && parentMenu.isEnabled ();
}
/**
* Returns true
if the receiver is visible and all
* of the receiver's ancestors are visible and false
* otherwise.
*
* @return the receiver's visibility state
*
* @exception SWTException
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
*
*
* @see #getVisible
*/
public boolean isVisible () {
checkWidget();
return getVisible ();
}
long /*int*/ menuPositionProc (long /*int*/ menu, long /*int*/ x, long /*int*/ y, long /*int*/ push_in, long /*int*/ user_data) {
/*
* Feature in GTK. The menu position function sets the position of the
* top-left pixel of the menu. If the menu would be off-screen, GTK will
* add a scroll arrow at the bottom and position the first menu entry at
* the specified position. The fix is to flip the menu location to be
* completely inside the screen.
*
* NOTE: This code doesn't work for multiple monitors.
*/
GtkRequisition requisition = new GtkRequisition ();
gtk_widget_get_preferred_size (menu, requisition);
int screenHeight = OS.gdk_screen_height ();
int reqy = this.y;
if (reqy + requisition.height > screenHeight) {
reqy = Math.max (0, reqy - requisition.height);
}
int screenWidth = OS.gdk_screen_width ();
int reqx = this.x;
if ((style & SWT.RIGHT_TO_LEFT) != 0) {
if (reqx - requisition.width >= 0) reqx -= requisition.width;
} else {
if (reqx + requisition.width > screenWidth) reqx -= requisition.width;
}
if (x != 0) OS.memmove (x, new int [] {reqx}, 4);
if (y != 0) OS.memmove (y, new int [] {reqy}, 4);
if (push_in != 0) OS.memmove (push_in, new int [] {1}, 4);
return 0;
}
void releaseChildren (boolean destroy) {
MenuItem [] items = getItems ();
for (int i=0; i
* ERROR_NULL_ARGUMENT - if the listener is null
*
* @exception SWTException
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
*
*
* @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 removeAccelerators (long /*int*/ accelGroup) {
MenuItem [] items = getItems ();
for (int i = 0; i < items.length; i++) {
MenuItem item = items[i];
item.removeAccelerators (accelGroup);
}
}
/**
* 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
* - ERROR_NULL_ARGUMENT - if the listener is null
*
* @exception SWTException
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
*
*
* @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);
}
void reskinChildren (int flags) {
MenuItem [] items = getItems ();
for (int i=0; inull.
*
* @param item the default menu item or null
*
* @exception IllegalArgumentException
* - ERROR_INVALID_ARGUMENT - if the menu item has been disposed
*
* @exception SWTException
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
*
*/
public void setDefaultItem (MenuItem item) {
checkWidget();
}
/**
* Enables the receiver if the argument is true
,
* 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
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
*
*/
public void setEnabled (boolean enabled) {
checkWidget();
OS.gtk_widget_set_sensitive (handle, enabled);
}
/**
* Sets the location of the receiver, which must be a popup,
* to the point specified by the arguments which are relative
* to the display.
*
* Note that this is different from most widgets where the
* location of the widget is relative to the parent.
*
* Note that the platform window manager ultimately has control
* over the location of popup menus.
*
*
* @param x the new x coordinate for the receiver
* @param y the new y coordinate for the receiver
*
* @exception SWTException
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
*
*/
public void setLocation (int x, int y) {
checkWidget();
if ((style & (SWT.BAR | SWT.DROP_DOWN)) != 0) return;
this.x = x;
this.y = y;
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.
*
* Note that this is different from most widgets where the
* location of the widget is relative to the parent.
*
* Note that the platform window manager ultimately has control
* over the location of popup menus.
*
*
* @param location the new location for the receiver
*
* @exception IllegalArgumentException
* - ERROR_NULL_ARGUMENT - if the point is null
*
* @exception SWTException
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
*
*
* @since 2.1
*/
public void setLocation (Point location) {
checkWidget();
if (location == null) error (SWT.ERROR_NULL_ARGUMENT);
setLocation (location.x, location.y);
}
/**
* Sets the orientation of the receiver, which must be one
* of the constants SWT.LEFT_TO_RIGHT
or SWT.RIGHT_TO_LEFT
.
*
*
* @param orientation new orientation style
*
* @exception SWTException
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
*
*
* @since 3.7
*/
public void setOrientation (int orientation) {
checkWidget ();
if ((style & (SWT.BAR | SWT.DROP_DOWN)) != 0) return;
_setOrientation (orientation);
}
void _setOrientation (int orientation) {
int flags = SWT.RIGHT_TO_LEFT | SWT.LEFT_TO_RIGHT;
if ((orientation & flags) == 0 || (orientation & flags) == flags) return;
style &= ~flags;
style |= orientation & flags;
setOrientation (false);
}
void setOrientation (boolean create) {
if ((style & SWT.RIGHT_TO_LEFT) != 0 || !create) {
int dir = (style & SWT.RIGHT_TO_LEFT) != 0 ? OS.GTK_TEXT_DIR_RTL : OS.GTK_TEXT_DIR_LTR;
if (handle != 0) OS.gtk_widget_set_direction (handle, dir);
MenuItem [] items = getItems ();
for (int i = 0; i < items.length; i++) {
items [i].setOrientation (create);
}
}
}
/**
* Marks the receiver as visible if the argument is true
,
* and marks it invisible otherwise.
*
* 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.
*
*
* @param visible the new visibility state
*
* @exception SWTException
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
*
*/
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);
}
}
}