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authorSilenio Quarti <silenio>2009-07-01 14:50:54 +0000
committerSilenio Quarti <silenio>2009-07-01 14:50:54 +0000
commit093c579a4ffd9551acb901bba9617e7aa776989d (patch)
tree71cf23798b651ef92f188390841a8d130908fb11 /bundles/org.eclipse.swt/Eclipse SWT/gtk/org/eclipse/swt/widgets/Decorations.java
parentf664d297f7bb009784868bf3fcf0b3e3bb9a646b (diff)
downloadeclipse.platform.swt-093c579a4ffd9551acb901bba9617e7aa776989d.tar.gz
eclipse.platform.swt-093c579a4ffd9551acb901bba9617e7aa776989d.tar.xz
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+/*******************************************************************************
+ * Copyright (c) 2000, 2009 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);
+}
+
+}