| /******************************************************************************* |
| * 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.graphics.*; |
| import org.eclipse.swt.internal.wpf.*; |
| import org.eclipse.swt.*; |
| |
| /** |
| * Instances of this class provide an etched border |
| * with an optional title. |
| * <p> |
| * Shadow styles are hints and may not be honoured |
| * by the platform. To create a group with the |
| * default shadow style for the platform, do not |
| * specify a shadow style. |
| * <dl> |
| * <dt><b>Styles:</b></dt> |
| * <dd>SHADOW_ETCHED_IN, SHADOW_ETCHED_OUT, SHADOW_IN, SHADOW_OUT, SHADOW_NONE</dd> |
| * <dt><b>Events:</b></dt> |
| * <dd>(none)</dd> |
| * </dl> |
| * <p> |
| * Note: Only one of the above styles may be specified. |
| * </p><p> |
| * IMPORTANT: This class is <em>not</em> intended to be subclassed. |
| * </p> |
| * |
| * @see <a href="http://www.eclipse.org/swt/examples.php">SWT Example: ControlExample</a> |
| * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a> |
| */ |
| |
| public class Group extends Composite { |
| int parentingHandle; |
| String text; |
| |
| /** |
| * 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#SHADOW_ETCHED_IN |
| * @see SWT#SHADOW_ETCHED_OUT |
| * @see SWT#SHADOW_IN |
| * @see SWT#SHADOW_OUT |
| * @see SWT#SHADOW_NONE |
| * @see Widget#checkSubclass |
| * @see Widget#getStyle |
| */ |
| public Group (Composite parent, int style) { |
| super (parent, checkStyle (style)); |
| } |
| |
| static int checkStyle (int style) { |
| style |= SWT.NO_FOCUS; |
| /* |
| * Even though it is legal to create this widget |
| * with scroll bars, they serve no useful purpose |
| * because they do not automatically scroll the |
| * widget's client area. The fix is to clear |
| * the SWT style. |
| */ |
| return style & ~(SWT.H_SCROLL | SWT.V_SCROLL); |
| } |
| |
| protected void checkSubclass () { |
| if (!isValidSubclass ()) error (SWT.ERROR_INVALID_SUBCLASS); |
| } |
| |
| int backgroundProperty () { |
| return OS.Control_BackgroundProperty (); |
| } |
| |
| int clientHandle () { |
| return parentingHandle; |
| } |
| |
| void createHandle () { |
| state |= THEME_BACKGROUND; |
| handle = OS.gcnew_GroupBox (); |
| if (handle == 0) error (SWT.ERROR_NO_HANDLES); |
| parentingHandle = OS.gcnew_Canvas (); |
| if (parentingHandle == 0) error (SWT.ERROR_NO_HANDLES); |
| OS.ContentControl_Content (handle, parentingHandle); |
| } |
| |
| public Rectangle computeTrim (int x, int y, int width, int height) { |
| int topHandle = topHandle (); |
| int clientHandle = clientHandle(); |
| if (clientHandle != topHandle) { |
| double currentWidth = OS.FrameworkElement_Width (topHandle); |
| double currentHeight = OS.FrameworkElement_Height (topHandle); |
| OS.FrameworkElement_Width (topHandle, 100); |
| OS.FrameworkElement_Height (topHandle, 100); |
| updateLayout (topHandle); |
| int w = (int) OS.FrameworkElement_ActualWidth (topHandle); |
| int h = (int) OS.FrameworkElement_ActualHeight (topHandle); |
| int clientWidth = (int) OS.FrameworkElement_ActualWidth (clientHandle); |
| int clientHeight = (int) OS.FrameworkElement_ActualHeight (clientHandle); |
| int point = OS.gcnew_Point (0, 0); |
| int result = OS.UIElement_TranslatePoint (clientHandle, point, topHandle); |
| x -= (int) OS.Point_X (result); |
| y -= (int) OS.Point_Y (result); |
| width += (w - clientWidth); |
| height += (h - clientHeight); |
| OS.GCHandle_Free (point); |
| OS.GCHandle_Free (result); |
| OS.FrameworkElement_Width (topHandle, currentWidth); |
| OS.FrameworkElement_Height (topHandle, currentHeight); |
| } |
| return new Rectangle (x, y, width, height); |
| } |
| |
| int defaultBackground () { |
| return OS.SystemColors_ControlColor; |
| } |
| |
| void enableWidget (boolean enabled) { |
| OS.UIElement_IsHitTestVisible (handle, enabled); |
| } |
| |
| String getNameText () { |
| return getText (); |
| } |
| |
| /** |
| * Returns the receiver's text, which is the string that the |
| * is used as the <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; |
| } |
| |
| boolean mnemonicHit (char key) { |
| return false; |
| } |
| |
| boolean mnemonicMatch (char key) { |
| int accessText = OS.HeaderedContentControl_Header (handle); |
| boolean result = super.mnemonicMatch (accessText, key); |
| OS.GCHandle_Free (accessText); |
| return result; |
| } |
| |
| void releaseHandle () { |
| super.releaseHandle (); |
| OS.GCHandle_Free (parentingHandle); |
| parentingHandle = 0; |
| } |
| |
| void setForegroundBrush (int brush) { |
| if (brush != 0) { |
| OS.Control_Foreground (handle, brush); |
| } else { |
| int property = OS.Control_ForegroundProperty (); |
| OS.DependencyObject_ClearValue (handle, property); |
| OS.GCHandle_Free (property); |
| } |
| } |
| |
| /** |
| * Sets the receiver's text, which is the string that will |
| * be displayed as the receiver's <em>title</em>, to the argument, |
| * which may not be null. The string may include the mnemonic character. |
| * </p> |
| * 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, focus is assigned |
| * to the first child of the group. 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. |
| * </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); |
| if (string.equals (text)) return; |
| text = string; |
| int ptr = createDotNetString (text, true); |
| int accessText = OS.gcnew_AccessText (); |
| if (ptr != 0) OS.AccessText_Text (accessText, ptr); |
| OS.HeaderedContentControl_Header (handle, accessText); |
| if (ptr != 0) OS.GCHandle_Free (ptr); |
| OS.GCHandle_Free (accessText); |
| } |
| |
| int parentingHandle () { |
| return parentingHandle; |
| } |
| |
| } |