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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/TabItem.java
parentf664d297f7bb009784868bf3fcf0b3e3bb9a646b (diff)
downloadeclipse.platform.swt-093c579a4ffd9551acb901bba9617e7aa776989d.tar.gz
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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.*;
+import org.eclipse.swt.internal.gtk.*;
+import org.eclipse.swt.graphics.*;
+
+/**
+ * Instances of this class represent a selectable user interface object
+ * corresponding to a tab for a page in a tab folder.
+ * <dl>
+ * <dt><b>Styles:</b></dt>
+ * <dd>(none)</dd>
+ * <dt><b>Events:</b></dt>
+ * <dd>(none)</dd>
+ * </dl>
+ * <p>
+ * IMPORTANT: This class is <em>not</em> intended to be subclassed.
+ * </p>
+ *
+ * @see <a href="http://www.eclipse.org/swt/snippets/#tabfolder">TabFolder, TabItem snippets</a>
+ * @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 TabItem extends Item {
+ int /*long*/ labelHandle, imageHandle, pageHandle;
+ Control control;
+ TabFolder parent;
+ String toolTipText;
+
+/**
+ * Constructs a new instance of this class given its parent
+ * (which must be a <code>TabFolder</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 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
+ * @see Widget#checkSubclass
+ * @see Widget#getStyle
+ */
+public TabItem (TabFolder parent, int style) {
+ super (parent, style);
+ this.parent = parent;
+ createWidget (parent.getItemCount ());
+}
+
+/**
+ * Constructs a new instance of this class given its parent
+ * (which must be a <code>TabFolder</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 composite control which will be the parent of the new instance (cannot be null)
+ * @param style the style of control to construct
+ * @param index the zero-relative index to store the receiver in its parent
+ *
+ * @exception IllegalArgumentException <ul>
+ * <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
+ * <li>ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the parent (inclusive)</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
+ * @see Widget#checkSubclass
+ * @see Widget#getStyle
+ */
+public TabItem (TabFolder parent, int style, int index) {
+ super (parent, style);
+ this.parent = parent;
+ createWidget (index);
+}
+
+protected void checkSubclass () {
+ if (!isValidSubclass ()) error (SWT.ERROR_INVALID_SUBCLASS);
+}
+
+void createWidget (int index) {
+ parent.createItem (this, index);
+ setOrientation ();
+ hookEvents ();
+ register ();
+ text = "";
+}
+
+void deregister() {
+ super.deregister ();
+ if (labelHandle != 0) display.removeWidget (labelHandle);
+}
+
+void destroyWidget () {
+ parent.destroyItem (this);
+ releaseHandle ();
+}
+
+/**
+ * Returns a rectangle describing the receiver's size and location
+ * relative to its parent.
+ *
+ * @return the receiver's bounding rectangle
+ *
+ * @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 3.4
+ */
+public Rectangle getBounds () {
+ checkWidget();
+ int x = OS.GTK_WIDGET_X (handle);
+ int y = OS.GTK_WIDGET_Y (handle);
+ int width = (state & ZERO_WIDTH) != 0 ? 0 : OS.GTK_WIDGET_WIDTH (handle);
+ int height = (state & ZERO_HEIGHT) != 0 ? 0 : OS.GTK_WIDGET_HEIGHT (handle);
+ if ((parent.style & SWT.MIRRORED) != 0) x = parent.getClientWidth () - width - x;
+ return new Rectangle (x, y, width, height);
+}
+
+/**
+ * Returns the control that is used to fill the client area of
+ * the tab folder when the user selects the tab item. If no
+ * control has been set, return <code>null</code>.
+ * <p>
+ * @return the control
+ *
+ * @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 Control getControl () {
+ checkWidget ();
+ return control;
+}
+
+/**
+ * Returns the receiver's parent, which must be a <code>TabFolder</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 TabFolder getParent () {
+ checkWidget ();
+ return parent;
+}
+
+/**
+ * Returns the receiver's tool tip text, or null if it has
+ * not been set.
+ *
+ * @return the receiver's tool tip 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 getToolTipText () {
+ checkWidget ();
+ return toolTipText;
+}
+
+int /*long*/ gtk_enter_notify_event (int /*long*/ widget, int /*long*/ event) {
+ parent.gtk_enter_notify_event (widget, event);
+ return 0;
+}
+
+int /*long*/ gtk_mnemonic_activate (int /*long*/ widget, int /*long*/ arg1) {
+ return parent.gtk_mnemonic_activate (widget, arg1);
+}
+
+void hookEvents () {
+ super.hookEvents ();
+ if (labelHandle != 0) OS.g_signal_connect_closure_by_id (labelHandle, display.signalIds [MNEMONIC_ACTIVATE], 0, display.closures [MNEMONIC_ACTIVATE], false);
+ OS.g_signal_connect_closure_by_id (handle, display.signalIds [ENTER_NOTIFY_EVENT], 0, display.closures [ENTER_NOTIFY_EVENT], false);
+}
+
+void register () {
+ super.register ();
+ if (labelHandle != 0) display.addWidget (labelHandle, this);
+}
+
+void releaseHandle () {
+ super.releaseHandle ();
+ pageHandle = labelHandle = imageHandle = 0;
+ parent = null;
+}
+
+void releaseParent () {
+ super.releaseParent ();
+ int index = parent.indexOf (this);
+ if (index == parent.getSelectionIndex ()) {
+ if (control != null) control.setVisible (false);
+ }
+}
+
+/**
+ * Sets the control that is used to fill the client area of
+ * the tab folder when the user selects the tab item.
+ * <p>
+ * @param control the new control (or null)
+ *
+ * @exception IllegalArgumentException <ul>
+ * <li>ERROR_INVALID_ARGUMENT - if the control 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 setControl (Control control) {
+ checkWidget ();
+ if (control != null) {
+ if (control.isDisposed ()) error (SWT.ERROR_INVALID_ARGUMENT);
+ if (control.parent != parent) error (SWT.ERROR_INVALID_PARENT);
+ }
+ Control oldControl = this.control, newControl = control;
+ this.control = control;
+ int index = parent.indexOf (this), selectionIndex = parent.getSelectionIndex();
+ if (index != selectionIndex) {
+ if (newControl != null) {
+ if (selectionIndex != -1) {
+ Control selectedControl = parent.getItem(selectionIndex).getControl();
+ if (selectedControl == newControl) return;
+ }
+ newControl.setVisible(false);
+ return;
+ }
+ }
+ if (newControl != null) {
+ newControl.setBounds (parent.getClientArea ());
+ newControl.setVisible (true);
+ }
+ if (oldControl != null) oldControl.setVisible (false);
+}
+
+void setFontDescription (int /*long*/ font) {
+ OS.gtk_widget_modify_font (labelHandle, font);
+ OS.gtk_widget_modify_font (imageHandle, font);
+}
+
+void setForegroundColor (GdkColor color) {
+ /* Don't set the color in vbox handle (it doesn't draw) */
+ setForegroundColor (labelHandle, color);
+ setForegroundColor (imageHandle, color);
+}
+
+public void setImage (Image image) {
+ checkWidget ();
+ super.setImage (image);
+ if (image != null) {
+ ImageList imageList = parent.imageList;
+ if (imageList == null) imageList = parent.imageList = new ImageList ();
+ int imageIndex = imageList.indexOf (image);
+ if (imageIndex == -1) {
+ imageIndex = imageList.add (image);
+ } else {
+ imageList.put (imageIndex, image);
+ }
+ int /*long*/ pixbuf = imageList.getPixbuf (imageIndex);
+ OS.gtk_image_set_from_pixbuf (imageHandle, pixbuf);
+ OS.gtk_widget_show (imageHandle);
+ } else {
+ OS.gtk_image_set_from_pixbuf (imageHandle, 0);
+ OS.gtk_widget_hide (imageHandle);
+ }
+}
+
+void setOrientation () {
+ if ((parent.style & SWT.RIGHT_TO_LEFT) != 0) {
+ if (handle != 0) OS.gtk_widget_set_direction (handle, OS.GTK_TEXT_DIR_RTL);
+ if (labelHandle != 0) OS.gtk_widget_set_direction (labelHandle, OS.GTK_TEXT_DIR_RTL);
+ if (imageHandle != 0) OS.gtk_widget_set_direction (imageHandle, OS.GTK_TEXT_DIR_RTL);
+ if (pageHandle != 0) OS.gtk_widget_set_direction (pageHandle, OS.GTK_TEXT_DIR_RTL);
+ }
+}
+
+/**
+ * Sets the receiver's text. The string may include
+ * the mnemonic character.
+ * </p>
+ * <p>
+ * Mnemonics are indicated by an '&amp;' 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 '&amp;' can be
+ * escaped by doubling it in the string, causing a single
+ * '&amp;' to be displayed.
+ * </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>
+ *
+ */
+public void setText (String string) {
+ checkWidget ();
+ if (string == null) error (SWT.ERROR_NULL_ARGUMENT);
+ super.setText (string);
+ char [] chars = fixMnemonic (string);
+ byte [] buffer = Converter.wcsToMbcs (null, chars, true);
+ OS.gtk_label_set_text_with_mnemonic (labelHandle, buffer);
+ if (string.length () != 0) {
+ OS.gtk_widget_show (labelHandle);
+ } else {
+ OS.gtk_widget_hide (labelHandle);
+ }
+}
+
+/**
+ * Sets the receiver's tool tip text to the argument, which
+ * may be null indicating that the default tool tip for the
+ * control will be shown. For a control that has a default
+ * tool tip, such as the Tree control on Windows, setting
+ * the tool tip text to an empty string replaces the default,
+ * causing no tool tip text to be shown.
+ * <p>
+ * The mnemonic indicator (character '&amp;') is not displayed in a tool tip.
+ * To display a single '&amp;' in the tool tip, the character '&amp;' can be
+ * escaped by doubling it in the string.
+ * </p>
+ *
+ * @param string the new tool tip text (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 void setToolTipText (String string) {
+ checkWidget ();
+ toolTipText = string;
+}
+
+}