/******************************************************************************* * Copyright (c) 2000, 2012 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. *
*
Styles:
*
(none)
*
Events:
*
(none)
*
*

* IMPORTANT: This class is not intended to be subclassed. *

* * @see TabFolder, TabItem snippets * @see Sample code and further information * @noextend This class is not intended to be subclassed by clients. */ public class TabItem extends Item { long /*int*/ labelHandle, imageHandle, pageHandle; Control control; TabFolder parent; String toolTipText; /** * Constructs a new instance of this class given its parent * (which must be a TabFolder) and a style value * describing its behavior and appearance. The item is added * to the end of the items maintained by its parent. *

* 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. *

* * @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 * @exception SWTException * * @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 TabFolder), a style value * describing its behavior and appearance, and the index * at which to place it in the items maintained by its parent. *

* 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. *

* * @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 * @exception SWTException * * @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 (true); 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 * * @since 3.4 */ public Rectangle getBounds () { checkWidget(); GtkAllocation allocation = new GtkAllocation (); gtk_widget_get_allocation (handle, allocation); int x = allocation.x; int y = allocation.y; int width = (state & ZERO_WIDTH) != 0 ? 0 : allocation.width; int height = (state & ZERO_HEIGHT) != 0 ? 0 : allocation.height; 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 null. *

* @return the control * * @exception SWTException

*/ public Control getControl () { checkWidget (); return control; } /** * Returns the receiver's parent, which must be a TabFolder. * * @return the receiver's parent * * @exception SWTException */ 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 */ public String getToolTipText () { checkWidget (); return toolTipText; } long /*int*/ gtk_enter_notify_event (long /*int*/ widget, long /*int*/ event) { parent.gtk_enter_notify_event (widget, event); return 0; } long /*int*/ gtk_mnemonic_activate (long /*int*/ widget, long /*int*/ 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. *

* @param control the new control (or null) * * @exception IllegalArgumentException

* @exception SWTException */ 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 (long /*int*/ font) { setFontDescription (labelHandle, font); setFontDescription (imageHandle, font); } void setForegroundColor (GdkColor color) { /* Don't set the color in vbox handle (it doesn't draw) */ setForegroundColor (labelHandle, color, false); setForegroundColor (imageHandle, color, false); } 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); } long /*int*/ 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 (boolean create) { if ((parent.style & SWT.RIGHT_TO_LEFT) != 0 || !create) { int dir = (parent.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); if (labelHandle != 0) OS.gtk_widget_set_direction (labelHandle, dir); if (imageHandle != 0) OS.gtk_widget_set_direction (imageHandle, dir); if (pageHandle != 0) OS.gtk_widget_set_direction (pageHandle, dir); } } /** * Sets the receiver's text. The string may include * the mnemonic character. *

*

* 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. *

* * @param string the new text * * @exception IllegalArgumentException * @exception SWTException * */ 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. *

* The mnemonic indicator (character '&') is not displayed in a tool tip. * To display a single '&' in the tool tip, the character '&' can be * escaped by doubling it in the string. *

* * @param string the new tool tip text (or null) * * @exception SWTException */ public void setToolTipText (String string) { checkWidget (); toolTipText = string; } }