bundles/org.eclipse.swt/Eclipse SWT/gtk/org/eclipse/swt/widgets/Group.java - platform/eclipse.platform.swt - Git at Google

 /*******************************************************************************
  * Copyright (c) 2000, 2005 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 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 {
 	int /*long*/ 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);
 }

 int /*long*/ clientHandle () {
 	return clientHandle;
 }

 public Point computeSize (int wHint, int hHint, boolean changed) {
 	Point size = super.computeSize(wHint, hHint, changed);
 	int width = computeNativeSize (handle, SWT.DEFAULT, SWT.DEFAULT, false).x;
 	size.x = Math.max (size.x, width);
 	return size;
 }
 public Rectangle computeTrim (int x, int y, int width, int height) {
 	checkWidget();
 	forceResize ();
 	int clientX = OS.GTK_WIDGET_X (clientHandle);
 	int clientY = OS.GTK_WIDGET_Y (clientHandle);
 	x -= clientX;
 	y -= clientY;
 	width += clientX + clientX;
 	height += clientX + clientY;
 	return new Rectangle (x, y, width, height);
 }

 void createHandle(int index) {
 	state |= HANDLE | THEME_BACKGROUND;
 	fixedHandle = OS.g_object_new (display.gtk_fixed_get_type (), 0);
 	if (fixedHandle == 0) error (SWT.ERROR_NO_HANDLES);
 	OS.gtk_fixed_set_has_window (fixedHandle, true);
 	handle = OS.gtk_frame_new (null);
 	if (handle == 0) error (SWT.ERROR_NO_HANDLES);
 	labelHandle = OS.gtk_label_new (null);
 	if (labelHandle == 0) error (SWT.ERROR_NO_HANDLES);
 	OS.g_object_ref (labelHandle);
 	OS.gtk_object_sink (labelHandle);
 	clientHandle = OS.g_object_new (display.gtk_fixed_get_type (), 0);
 	if (clientHandle == 0) error (SWT.ERROR_NO_HANDLES);
 	OS.gtk_container_add (fixedHandle, handle);
 	OS.gtk_container_add (handle, clientHandle);
 	if ((style & SWT.SHADOW_IN) != 0) {
 		OS.gtk_frame_set_shadow_type (handle, OS.GTK_SHADOW_IN);
 	}
 	if ((style & SWT.SHADOW_OUT) != 0) {
 		OS.gtk_frame_set_shadow_type (handle, OS.GTK_SHADOW_OUT);
 	}
 	if ((style & SWT.SHADOW_ETCHED_IN) != 0) {
 		OS.gtk_frame_set_shadow_type (handle, OS.GTK_SHADOW_ETCHED_IN);
 	}
 	if ((style & SWT.SHADOW_ETCHED_OUT) != 0) {
 		OS.gtk_frame_set_shadow_type (handle, OS.GTK_SHADOW_ETCHED_OUT);
 	}
 }

 void deregister () {
 	super.deregister ();
 	display.removeWidget (clientHandle);
 	display.removeWidget (labelHandle);
 }

 void enableWidget (boolean enabled) {
 	OS.gtk_widget_set_sensitive (labelHandle, enabled);
 }

 int /*long*/ eventHandle () {
 	return fixedHandle;
 }

 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 () {
 	super.hookEvents();
 	if (labelHandle != 0) {
 		OS.g_signal_connect_closure_by_id (labelHandle, display.signalIds [MNEMONIC_ACTIVATE], 0, display.closures [MNEMONIC_ACTIVATE], false);
 	}
 }

 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);
 }

 int /*long*/ parentingHandle() {
 	return fixedHandle;
 }

 void register () {
 	super.register ();
 	display.addWidget (clientHandle, this);
 	display.addWidget (labelHandle, this);
 }

 void releaseHandle () {
 	super.releaseHandle ();
 	clientHandle = labelHandle = 0;
 }

 void releaseWidget () {
 	super.releaseWidget ();
 	if (labelHandle != 0) OS.g_object_unref (labelHandle);
 	text = null;
 }

 void setBackgroundColor (GdkColor color) {
 	super.setBackgroundColor (color);
 	setBackgroundColor(fixedHandle, color);
 }

 void setFontDescription (int /*long*/ font) {
 	super.setFontDescription (font);
 	OS.gtk_widget_modify_font (labelHandle, font);
 }

 void setForegroundColor (GdkColor color) {
 	super.setForegroundColor (color);
 	OS.gtk_widget_modify_fg (labelHandle,  OS.GTK_STATE_NORMAL, color);
 }

 void setOrientation () {
 	super.setOrientation ();
 	if ((style & SWT.RIGHT_TO_LEFT) != 0) {
 		OS.gtk_widget_set_direction (labelHandle, OS.GTK_TEXT_DIR_RTL);
 	}
 }

 /**
  * 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 '&amp' 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
  *'&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);
 	text = 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) {
 		if (OS.gtk_frame_get_label_widget (handle) == 0) {
 			OS.gtk_frame_set_label_widget (handle, labelHandle);
 		}
 	} else {
 		OS.gtk_frame_set_label_widget (handle, 0);
 	}
 }

 void showWidget () {
 	super.showWidget ();
 	if (clientHandle != 0) OS.gtk_widget_show (clientHandle);
 	if (labelHandle != 0) OS.gtk_widget_show (labelHandle);
 }
 }
	/*******************************************************************************
	* Copyright (c) 2000, 2005 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 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 {
	int /long/ 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);
	}

	int /long/ clientHandle () {
	return clientHandle;
	}

	public Point computeSize (int wHint, int hHint, boolean changed) {
	Point size = super.computeSize(wHint, hHint, changed);
	int width = computeNativeSize (handle, SWT.DEFAULT, SWT.DEFAULT, false).x;
	size.x = Math.max (size.x, width);
	return size;
	}
	public Rectangle computeTrim (int x, int y, int width, int height) {
	checkWidget();
	forceResize ();
	int clientX = OS.GTK_WIDGET_X (clientHandle);
	int clientY = OS.GTK_WIDGET_Y (clientHandle);
	x -= clientX;
	y -= clientY;
	width += clientX + clientX;
	height += clientX + clientY;
	return new Rectangle (x, y, width, height);
	}

	void createHandle(int index) {
	state \|= HANDLE \| THEME_BACKGROUND;
	fixedHandle = OS.g_object_new (display.gtk_fixed_get_type (), 0);
	if (fixedHandle == 0) error (SWT.ERROR_NO_HANDLES);
	OS.gtk_fixed_set_has_window (fixedHandle, true);
	handle = OS.gtk_frame_new (null);
	if (handle == 0) error (SWT.ERROR_NO_HANDLES);
	labelHandle = OS.gtk_label_new (null);
	if (labelHandle == 0) error (SWT.ERROR_NO_HANDLES);
	OS.g_object_ref (labelHandle);
	OS.gtk_object_sink (labelHandle);
	clientHandle = OS.g_object_new (display.gtk_fixed_get_type (), 0);
	if (clientHandle == 0) error (SWT.ERROR_NO_HANDLES);
	OS.gtk_container_add (fixedHandle, handle);
	OS.gtk_container_add (handle, clientHandle);
	if ((style & SWT.SHADOW_IN) != 0) {
	OS.gtk_frame_set_shadow_type (handle, OS.GTK_SHADOW_IN);
	}
	if ((style & SWT.SHADOW_OUT) != 0) {
	OS.gtk_frame_set_shadow_type (handle, OS.GTK_SHADOW_OUT);
	}
	if ((style & SWT.SHADOW_ETCHED_IN) != 0) {
	OS.gtk_frame_set_shadow_type (handle, OS.GTK_SHADOW_ETCHED_IN);
	}
	if ((style & SWT.SHADOW_ETCHED_OUT) != 0) {
	OS.gtk_frame_set_shadow_type (handle, OS.GTK_SHADOW_ETCHED_OUT);
	}
	}

	void deregister () {
	super.deregister ();
	display.removeWidget (clientHandle);
	display.removeWidget (labelHandle);
	}

	void enableWidget (boolean enabled) {
	OS.gtk_widget_set_sensitive (labelHandle, enabled);
	}

	int /long/ eventHandle () {
	return fixedHandle;
	}

	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 () {
	super.hookEvents();
	if (labelHandle != 0) {
	OS.g_signal_connect_closure_by_id (labelHandle, display.signalIds [MNEMONIC_ACTIVATE], 0, display.closures [MNEMONIC_ACTIVATE], false);
	}
	}

	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);
	}

	int /long/ parentingHandle() {
	return fixedHandle;
	}

	void register () {
	super.register ();
	display.addWidget (clientHandle, this);
	display.addWidget (labelHandle, this);
	}

	void releaseHandle () {
	super.releaseHandle ();
	clientHandle = labelHandle = 0;
	}

	void releaseWidget () {
	super.releaseWidget ();
	if (labelHandle != 0) OS.g_object_unref (labelHandle);
	text = null;
	}

	void setBackgroundColor (GdkColor color) {
	super.setBackgroundColor (color);
	setBackgroundColor(fixedHandle, color);
	}

	void setFontDescription (int /long/ font) {
	super.setFontDescription (font);
	OS.gtk_widget_modify_font (labelHandle, font);
	}

	void setForegroundColor (GdkColor color) {
	super.setForegroundColor (color);
	OS.gtk_widget_modify_fg (labelHandle, OS.GTK_STATE_NORMAL, color);
	}

	void setOrientation () {
	super.setOrientation ();
	if ((style & SWT.RIGHT_TO_LEFT) != 0) {
	OS.gtk_widget_set_direction (labelHandle, OS.GTK_TEXT_DIR_RTL);
	}
	}

	/**
	* 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 '&amp' 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
	*'&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);
	text = 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) {
	if (OS.gtk_frame_get_label_widget (handle) == 0) {
	OS.gtk_frame_set_label_widget (handle, labelHandle);
	}
	} else {
	OS.gtk_frame_set_label_widget (handle, 0);
	}
	}

	void showWidget () {
	super.showWidget ();
	if (clientHandle != 0) OS.gtk_widget_show (clientHandle);
	if (labelHandle != 0) OS.gtk_widget_show (labelHandle);
	}
	}