| package org.eclipse.swt.widgets; |
| |
| /* |
| * Copyright (c) 2000, 2002 IBM Corp. All rights reserved. |
| * This file is made available under the terms of the Common Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/cpl-v10.html |
| */ |
| |
| import org.eclipse.swt.SWT; |
| import org.eclipse.swt.graphics.*; |
| import org.eclipse.swt.internal.carbon.OS; |
| import org.eclipse.swt.internal.carbon.Rect; |
| |
| /** |
| * 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> |
| */ |
| public class Group extends Composite { |
| 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) { |
| /* |
| * 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); |
| } |
| |
| public Rectangle computeTrim (int x, int y, int width, int height) { |
| checkWidget (); |
| Rect bounds = new Rect (); |
| OS.GetControlBounds (handle, bounds); |
| int rgnHandle = OS.NewRgn (); |
| OS.GetControlRegion (handle, (short)OS.kControlContentMetaPart, rgnHandle); |
| Rect client = new Rect (); |
| OS.GetRegionBounds (rgnHandle, client); |
| OS.DisposeRgn (rgnHandle); |
| x -= client.left - bounds.left; |
| y -= client.top - bounds.top; |
| width += Math.max (8, (bounds.right - bounds.left) - (client.right - client.left)); |
| height += Math.max (22, (bounds.bottom - bounds.top) - (client.bottom - client.top)); |
| return new Rectangle (x, y, width, height); |
| } |
| |
| void createHandle () { |
| int [] outControl = new int [1]; |
| int window = OS.GetControlOwner (parent.handle); |
| OS.CreateGroupBoxControl (window, null, 0, true, outControl); |
| if (outControl [0] == 0) error (SWT.ERROR_NO_HANDLES); |
| handle = outControl [0]; |
| } |
| |
| int defaultThemeFont () { |
| return OS.kThemeEmphasizedSystemFont; |
| } |
| |
| void drawBackground (int control) { |
| drawBackground (control, background); |
| } |
| |
| public Rectangle getClientArea () { |
| checkWidget(); |
| Rect bounds = new Rect (); |
| OS.GetControlBounds (handle, bounds); |
| int rgnHandle = OS.NewRgn (); |
| OS.GetControlRegion (handle, (short)OS.kControlContentMetaPart, rgnHandle); |
| Rect client = new Rect (); |
| OS.GetRegionBounds (rgnHandle, client); |
| OS.DisposeRgn (rgnHandle); |
| int x = Math.max (0, client.left - bounds.left); |
| int y = Math.max (0, client.top - bounds.top); |
| int width = Math.max (0, client.right - client.left); |
| int height = Math.max (0, client.bottom - client.top); |
| return new Rectangle (x, y, width, height); |
| } |
| |
| /** |
| * 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; |
| } |
| |
| /** |
| * 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 assgned |
| * 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 text the new text |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the listener 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 ((style & SWT.ARROW) != 0) return; |
| text = string; |
| char [] buffer = new char [text.length ()]; |
| text.getChars (0, buffer.length, buffer, 0); |
| int i=0, j=0; |
| while (i < buffer.length) { |
| if ((buffer [j++] = buffer [i++]) == Mnemonic) { |
| if (i == buffer.length) {continue;} |
| if (buffer [i] == Mnemonic) {i++; continue;} |
| j--; |
| } |
| } |
| int ptr = OS.CFStringCreateWithCharacters (OS.kCFAllocatorDefault, buffer, j); |
| if (ptr == 0) error (SWT.ERROR_CANNOT_SET_TEXT); |
| OS.SetControlTitleWithCFString (handle, ptr); |
| OS.CFRelease (ptr); |
| } |
| |
| } |