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/*******************************************************************************
* Copyright (c) 2000, 2008 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.swt.widgets;
import org.eclipse.swt.*;
import org.eclipse.swt.internal.gtk.*;
import org.eclipse.swt.graphics.*;
/**
* Instances of this class provide the appearance and
* behavior of <code>Shells</code>, but are not top
* level shells or dialogs. Class <code>Shell</code>
* shares a significant amount of code with this class,
* and is a subclass.
* <p>
* IMPORTANT: This class was intended to be abstract and
* should <em>never</em> be referenced or instantiated.
* Instead, the class <code>Shell</code> should be used.
* </p>
* <p>
* Instances are always displayed in one of the maximized,
* minimized or normal states:
* <ul>
* <li>
* When an instance is marked as <em>maximized</em>, the
* window manager will typically resize it to fill the
* entire visible area of the display, and the instance
* is usually put in a state where it can not be resized
* (even if it has style <code>RESIZE</code>) until it is
* no longer maximized.
* </li><li>
* When an instance is in the <em>normal</em> state (neither
* maximized or minimized), its appearance is controlled by
* the style constants which were specified when it was created
* and the restrictions of the window manager (see below).
* </li><li>
* When an instance has been marked as <em>minimized</em>,
* its contents (client area) will usually not be visible,
* and depending on the window manager, it may be
* "iconified" (that is, replaced on the desktop by a small
* simplified representation of itself), relocated to a
* distinguished area of the screen, or hidden. Combinations
* of these changes are also possible.
* </li>
* </ul>
* </p>
* Note: The styles supported by this class must be treated
* as <em>HINT</em>s, since the window manager for the
* desktop on which the instance is visible has ultimate
* control over the appearance and behavior of decorations.
* For example, some window managers only support resizable
* windows and will always assume the RESIZE style, even if
* it is not set.
* <dl>
* <dt><b>Styles:</b></dt>
* <dd>BORDER, CLOSE, MIN, MAX, NO_TRIM, RESIZE, TITLE, ON_TOP, TOOL</dd>
* <dt><b>Events:</b></dt>
* <dd>(none)</dd>
* </dl>
* Class <code>SWT</code> provides two "convenience constants"
* for the most commonly required style combinations:
* <dl>
* <dt><code>SHELL_TRIM</code></dt>
* <dd>
* the result of combining the constants which are required
* to produce a typical application top level shell: (that
* is, <code>CLOSE | TITLE | MIN | MAX | RESIZE</code>)
* </dd>
* <dt><code>DIALOG_TRIM</code></dt>
* <dd>
* the result of combining the constants which are required
* to produce a typical application dialog shell: (that
* is, <code>TITLE | CLOSE | BORDER</code>)
* </dd>
* </dl>
* <p>
* IMPORTANT: This class is intended to be subclassed <em>only</em>
* within the SWT implementation.
* </p>
*
* @see #getMinimized
* @see #getMaximized
* @see Shell
* @see SWT
* @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
* @noextend This class is not intended to be subclassed by clients.
*/
public class Decorations extends Canvas {
String text;
Image image;
Image [] images = new Image [0];
boolean minimized, maximized;
Menu menuBar;
Menu [] menus;
Control savedFocus;
Button defaultButton, saveDefault;
int /*long*/ accelGroup, vboxHandle;
Decorations () {
/* Do nothing */
}
/**
* Constructs a new instance of this class given its parent
* 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 composite 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#BORDER
* @see SWT#CLOSE
* @see SWT#MIN
* @see SWT#MAX
* @see SWT#RESIZE
* @see SWT#TITLE
* @see SWT#NO_TRIM
* @see SWT#SHELL_TRIM
* @see SWT#DIALOG_TRIM
* @see SWT#ON_TOP
* @see SWT#TOOL
* @see Widget#checkSubclass
* @see Widget#getStyle
*/
public Decorations (Composite parent, int style) {
super (parent, checkStyle (style));
}
static int checkStyle (int style) {
if ((style & SWT.NO_TRIM) != 0) {
style &= ~(SWT.CLOSE | SWT.TITLE | SWT.MIN | SWT.MAX | SWT.RESIZE | SWT.BORDER);
}
if ((style & (SWT.MENU | SWT.MIN | SWT.MAX | SWT.CLOSE)) != 0) {
style |= SWT.TITLE;
}
return style;
}
protected void checkSubclass () {
if (!isValidSubclass ()) error (SWT.ERROR_INVALID_SUBCLASS);
}
void _setImages (Image [] images) {
if (images != null && images.length > 1) {
Image [] bestImages = new Image [images.length];
System.arraycopy (images, 0, bestImages, 0, images.length);
sort (bestImages);
images = bestImages;
}
int /*long*/ pixbufs = 0;
if (images != null) {
for (int i = 0; i < images.length; i++) {
Image image = images [i];
int /*long*/ pixbuf = Display.createPixbuf (image);
pixbufs = OS.g_list_append (pixbufs, pixbuf);
}
}
OS.gtk_window_set_icon_list (topHandle (), pixbufs);
int /*long*/ [] data = new int /*long*/ [1];
int /*long*/ temp = pixbufs;
while (temp != 0) {
OS.memmove (data, temp, OS.PTR_SIZEOF);
OS.g_object_unref (data [0]);
temp = OS.g_list_next (temp);
}
if (pixbufs != 0) OS.g_list_free (pixbufs);
}
void addMenu (Menu menu) {
if (menus == null) menus = new Menu [4];
for (int i=0; i<menus.length; i++) {
if (menus [i] == null) {
menus [i] = menu;
return;
}
}
Menu [] newMenus = new Menu [menus.length + 4];
newMenus [menus.length] = menu;
System.arraycopy (menus, 0, newMenus, 0, menus.length);
menus = newMenus;
}
int compare (ImageData data1, ImageData data2) {
if (data1.width == data2.width && data1.height == data2.height) {
int transparent1 = data1.getTransparencyType ();
int transparent2 = data2.getTransparencyType ();
if (transparent1 == SWT.TRANSPARENCY_ALPHA) return -1;
if (transparent2 == SWT.TRANSPARENCY_ALPHA) return 1;
if (transparent1 == SWT.TRANSPARENCY_MASK) return -1;
if (transparent2 == SWT.TRANSPARENCY_MASK) return 1;
if (transparent1 == SWT.TRANSPARENCY_PIXEL) return -1;
if (transparent2 == SWT.TRANSPARENCY_PIXEL) return 1;
return 0;
}
return data1.width > data2.width || data1.height > data2.height ? -1 : 1;
}
Widget computeTabGroup () {
return this;
}
Control computeTabRoot () {
return this;
}
void createAccelGroup () {
if (accelGroup != 0) return;
accelGroup = OS.gtk_accel_group_new ();
if (accelGroup == 0) SWT.error (SWT.ERROR_NO_HANDLES);
//FIXME - what should we do for Decorations
int /*long*/ shellHandle = topHandle ();
OS.gtk_window_add_accel_group (shellHandle, accelGroup);
}
void createWidget (int index) {
super.createWidget (index);
text = "";
}
void destroyAccelGroup () {
if (accelGroup == 0) return;
int /*long*/ shellHandle = topHandle ();
OS.gtk_window_remove_accel_group (shellHandle, accelGroup);
//TEMPORARY CODE
// OS.g_object_unref (accelGroup);
accelGroup = 0;
}
void fixAccelGroup () {
if (menuBar == null) return;
destroyAccelGroup ();
createAccelGroup ();
menuBar.addAccelerators (accelGroup);
}
void fixDecorations (Decorations newDecorations, Control control, Menu [] menus) {
if (this == newDecorations) return;
if (control == savedFocus) savedFocus = null;
if (control == defaultButton) defaultButton = null;
if (control == saveDefault) saveDefault = null;
if (menus == null) return;
Menu menu = control.menu;
if (menu != null) {
int index = 0;
while (index <menus.length) {
if (menus [index] == menu) {
control.setMenu (null);
return;
}
index++;
}
menu.fixMenus (newDecorations);
}
}
/**
* Returns the receiver's default button if one had
* previously been set, otherwise returns null.
*
* @return the default button or null
*
* @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 #setDefaultButton(Button)
*/
public Button getDefaultButton () {
checkWidget();
return defaultButton != null ? defaultButton : saveDefault;
}
/**
* Returns the receiver's image if it had previously been
* set using <code>setImage()</code>. The image is typically
* displayed by the window manager when the instance is
* marked as iconified, and may also be displayed somewhere
* in the trim when the instance is in normal or maximized
* states.
* <p>
* Note: This method will return null if called before
* <code>setImage()</code> is called. It does not provide
* access to a window manager provided, "default" image
* even if one exists.
* </p>
*
* @return the image
*
* @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 Image getImage () {
checkWidget ();
return image;
}
/**
* Returns the receiver's images if they had previously been
* set using <code>setImages()</code>. Images are typically
* displayed by the window manager when the instance is
* marked as iconified, and may also be displayed somewhere
* in the trim when the instance is in normal or maximized
* states. Depending where the icon is displayed, the platform
* chooses the icon with the "best" attributes. It is expected
* that the array will contain the same icon rendered at different
* sizes, with different depth and transparency attributes.
*
* <p>
* Note: This method will return an empty array if called before
* <code>setImages()</code> is called. It does not provide
* access to a window manager provided, "default" image
* even if one exists.
* </p>
*
* @return the images
*
* @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 3.0
*/
public Image [] getImages () {
checkWidget ();
if (images == null) return new Image [0];
Image [] result = new Image [images.length];
System.arraycopy (images, 0, result, 0, images.length);
return result;
}
/**
* Returns <code>true</code> if the receiver is currently
* maximized, and false otherwise.
* <p>
*
* @return the maximized 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 #setMaximized
*/
public boolean getMaximized () {
checkWidget();
return maximized;
}
/**
* Returns the receiver's menu bar if one had previously
* been set, otherwise returns null.
*
* @return the menu bar or null
*
* @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 getMenuBar () {
checkWidget();
return menuBar;
}
/**
* Returns <code>true</code> if the receiver is currently
* minimized, and false otherwise.
* <p>
*
* @return the minimized 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 #setMinimized
*/
public boolean getMinimized () {
checkWidget();
return minimized;
}
String getNameText () {
return getText ();
}
/**
* Returns the receiver's text, which is the string that the
* window manager will typically display as the receiver's
* <em>title</em>. If the text has not previously been set,
* returns an empty string.
*
* @return the text
*
* @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 String getText () {
checkWidget();
return text;
}
public boolean isReparentable () {
checkWidget ();
return false;
}
boolean isTabGroup () {
return true;
}
boolean isTabItem () {
return false;
}
Decorations menuShell () {
return this;
}
void removeMenu (Menu menu) {
if (menus == null) return;
for (int i=0; i<menus.length; i++) {
if (menus [i] == menu) {
menus [i] = null;
return;
}
}
}
void releaseChildren (boolean destroy) {
if (menuBar != null) {
menuBar.release (false);
menuBar = null;
}
super.releaseChildren (destroy);
if (menus != null) {
for (int i=0; i<menus.length; i++) {
Menu menu = menus [i];
if (menu != null && !menu.isDisposed ()) {
menu.dispose ();
}
}
menus = null;
}
}
void releaseHandle () {
super.releaseHandle ();
vboxHandle = 0;
}
void releaseWidget () {
super.releaseWidget ();
image = null;
images = null;
savedFocus = null;
defaultButton = saveDefault = null;
}
boolean restoreFocus () {
if (savedFocus != null && savedFocus.isDisposed ()) savedFocus = null;
boolean restored = savedFocus != null && savedFocus.setFocus ();
savedFocus = null;
/*
* This code is intentionally commented. When no widget
* has been given focus, some platforms give focus to the
* default button. Motif doesn't do this.
*/
// if (restored) return true;
// if (defaultButton != null && !defaultButton.isDisposed ()) {
// if (defaultButton.setFocus ()) return true;
// }
// return false;
return restored;
}
/**
* If the argument is not null, sets the receiver's default
* button to the argument, and if the argument is null, sets
* the receiver's default button to the first button which
* was set as the receiver's default button (called the
* <em>saved default button</em>). If no default button had
* previously been set, or the saved default button was
* disposed, the receiver's default button will be set to
* null.
* <p>
* The default button is the button that is selected when
* the receiver is active and the user presses ENTER.
* </p>
*
* @param button the new default button
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_INVALID_ARGUMENT - if the button has been disposed</li>
* <li>ERROR_INVALID_PARENT - if the control 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 setDefaultButton (Button button) {
checkWidget();
int /*long*/ buttonHandle = 0;
if (button != null) {
if (button.isDisposed ()) error (SWT.ERROR_INVALID_ARGUMENT);
if (button.menuShell () != this) error (SWT.ERROR_INVALID_PARENT);
buttonHandle = button.handle;
}
saveDefault = defaultButton = button;
OS.gtk_window_set_default (topHandle (), buttonHandle);
}
/**
* Sets the receiver's image to the argument, which may
* be null. The image is typically displayed by the window
* manager when the instance is marked as iconified, and
* may also be displayed somewhere in the trim when the
* instance is in normal or maximized states.
*
* @param image the new image (or null)
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_INVALID_ARGUMENT - if the image 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 setImage (Image image) {
checkWidget ();
this.image = image;
_setImages (image != null ? new Image [] {image} : null);
}
/**
* Sets the receiver's images to the argument, which may
* be an empty array. Images are typically displayed by the
* window manager when the instance is marked as iconified,
* and may also be displayed somewhere in the trim when the
* instance is in normal or maximized states. Depending where
* the icon is displayed, the platform chooses the icon with
* the "best" attributes. It is expected that the array will
* contain the same icon rendered at different sizes, with
* different depth and transparency attributes.
*
* @param images the new image array
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the array of images is null</li>
* <li>ERROR_INVALID_ARGUMENT - if one of the images is null or 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>
*
* @since 3.0
*/
public void setImages (Image [] images) {
checkWidget ();
if (images == null) error (SWT.ERROR_INVALID_ARGUMENT);
for (int i = 0; i < images.length; i++) {
if (images [i] == null || images [i].isDisposed ()) error (SWT.ERROR_INVALID_ARGUMENT);
}
this.images = images;
_setImages (images);
}
/**
* Sets the maximized state of the receiver.
* If the argument is <code>true</code> causes the receiver
* to switch to the maximized state, and if the argument is
* <code>false</code> and the receiver was previously maximized,
* causes the receiver to switch back to either the minimized
* or normal states.
* <p>
* Note: The result of intermixing calls to <code>setMaximized(true)</code>
* and <code>setMinimized(true)</code> will vary by platform. Typically,
* the behavior will match the platform user's expectations, but not
* always. This should be avoided if possible.
* </p>
*
* @param maximized the new maximized 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 #setMinimized
*/
public void setMaximized (boolean maximized) {
checkWidget();
this.maximized = maximized;
}
/**
* Sets the receiver's menu bar to the argument, which
* may be null.
*
* @param menu the new menu bar
*
* @exception IllegalArgumentException <ul>
* <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 setMenuBar (Menu menu) {
checkWidget();
if (menuBar == menu) return;
if (menu != null) {
if ((menu.style & SWT.BAR) == 0) error (SWT.ERROR_MENU_NOT_BAR);
if (menu.parent != this) error (SWT.ERROR_INVALID_PARENT);
}
menuBar = menu;
}
/**
* Sets the minimized stated of the receiver.
* If the argument is <code>true</code> causes the receiver
* to switch to the minimized state, and if the argument is
* <code>false</code> and the receiver was previously minimized,
* causes the receiver to switch back to either the maximized
* or normal states.
* <p>
* Note: The result of intermixing calls to <code>setMaximized(true)</code>
* and <code>setMinimized(true)</code> will vary by platform. Typically,
* the behavior will match the platform user's expectations, but not
* always. This should be avoided if possible.
* </p>
*
* @param minimized the new maximized 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 #setMaximized
*/
public void setMinimized (boolean minimized) {
checkWidget();
this.minimized = minimized;
}
void setSavedFocus (Control control) {
if (this == control) return;
savedFocus = control;
}
/**
* Sets the receiver's text, which is the string that the
* window manager will typically display as the receiver's
* <em>title</em>, to the argument, which must not be null.
*
* @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>
*/
public void setText (String string) {
checkWidget();
if (string == null) error (SWT.ERROR_NULL_ARGUMENT);
text = string;
}
void sort (Image [] images) {
/* Shell Sort from K&R, pg 108 */
int length = images.length;
if (length <= 1) return;
ImageData [] datas = new ImageData [length];
for (int i = 0; i < length; i++) {
datas [i] = images [i].getImageData ();
}
for (int gap=length/2; gap>0; gap/=2) {
for (int i=gap; i<length; i++) {
for (int j=i-gap; j>=0; j-=gap) {
if (compare (datas [j], datas [j + gap]) >= 0) {
Image swap = images [j];
images [j] = images [j + gap];
images [j + gap] = swap;
ImageData swapData = datas [j];
datas [j] = datas [j + gap];
datas [j + gap] = swapData;
}
}
}
}
}
boolean traverseItem (boolean next) {
return false;
}
boolean traverseReturn () {
Button button = defaultButton != null ? defaultButton: saveDefault;
if (button == null || button.isDisposed ()) return false;
/*
* Bug in GTK. When a default button that is disabled is
* activated using the Enter key, GTK GP's. The fix is to
* detect this case and stop GTK from processing the Enter
* key.
*/
if (!button.isVisible () || !button.isEnabled ()) return true;
int /*long*/ shellHandle = _getShell ().topHandle ();
return OS.gtk_window_activate_default (shellHandle);
}
}
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