/*******************************************************************************
* Copyright (c) 2000, 2010, 2012 IBM Corporation, Gerhardt Informatics Kft. 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
* Gerhardt Informatics Kft. - GEFGWT port
*******************************************************************************/
package org.eclipse.swt.widgets;
import org.eclipse.swt.SWT;
import org.eclipse.swt.SWTException;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.internal.gwt.GdkColor;
/**
* 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>
* @noextend This class is not intended to be subclassed by clients.
*/
public class Group extends Composite {
long /* int */clientHandle, labelHandle;
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);
}
public Point computeSize(int wHint, int hHint, boolean changed) {
return null;
}
public Rectangle computeTrim(int x, int y, int width, int height) {
return null;
}
void createHandle(int index) {
}
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;
}
void hookEvents() {
}
boolean mnemonicHit(char key) {
if (labelHandle == 0)
return false;
boolean result = super.mnemonicHit(labelHandle, key);
if (result)
setFocus();
return result;
}
boolean mnemonicMatch(char key) {
if (labelHandle == 0)
return false;
return mnemonicMatch(labelHandle, key);
}
void register() {
super.register();
display.addWidget(clientHandle, this);
display.addWidget(labelHandle, this);
}
void releaseHandle() {
super.releaseHandle();
clientHandle = labelHandle = 0;
}
void releaseWidget() {
}
void setBackgroundColor(GdkColor color) {
super.setBackgroundColor(color);
setBackgroundColor(fixedHandle, color);
}
void setFontDescription(long /* int */font) {
}
void setForegroundColor(GdkColor color) {
super.setForegroundColor(color);
setForegroundColor(labelHandle, color);
}
void setOrientation(boolean create) {
}
/**
* 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) {
}
void showWidget() {
}
}