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

 /*******************************************************************************
  * 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.graphics.*;
 import org.eclipse.swt.internal.cocoa.*;

 /**
  * 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 {
 	NSView contentView;
 	String text = "";
 	boolean ignoreResize;
 	int hMargin, vMargin;

 /**
  * 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 Rectangle computeTrim (int x, int y, int width, int height) {
 	checkWidget ();
 	NSBox widget = (NSBox)view;
 	NSRect newRect = new NSRect();
 	newRect.x = x;
 	newRect.y = y;
 	newRect.width = width;
 	newRect.height = height;
 	NSRect oldRect = widget.frame();
 	ignoreResize = true;
 	widget.setFrameFromContentFrame(newRect);
 	newRect = widget.frame();
 	widget.setFrame(oldRect);
 	ignoreResize = false;
 	x = (int) Math.ceil(newRect.x) - hMargin;
 	y = (int) Math.ceil(newRect.y) - vMargin;
 	width = (int) Math.ceil(newRect.width) + (hMargin * 2);
 	height = (int) Math.ceil(newRect.height) + (vMargin * 2);
 	return super.computeTrim(x, y, width, height);
 }

 NSView contentView () {
 	return contentView;
 }

 void createHandle () {
 	state |= THEME_BACKGROUND;
 	NSBox widget = (NSBox)new SWTBox().alloc();
 	widget.init();
 	widget.setTitlePosition(OS.NSNoTitle);
 	NSSize margins = widget.contentViewMargins();
 	hMargin = (int) margins.width;
 	vMargin = (int) margins.height;
 	widget.setContentViewMargins(new NSSize());

 	NSView contentWidget = (NSView)new SWTView().alloc();
 	contentWidget.init();
 //	contentWidget.setDrawsBackground(false);
 	widget.setContentView(contentWidget);
 	contentView = contentWidget;
 	view = widget;
 }

 NSFont defaultNSFont () {
 	return display.boxFont;
 }

 void deregister () {
 	super.deregister ();
 	display.removeWidget (contentView);
 	SWTBox box = (SWTBox)view;
 	display.removeWidget (box.titleCell());
 }

 void drawBackground (int /*long*/ id, NSGraphicsContext context, NSRect rect) {
 	if (id != view.id) return;
 	fillBackground (view, context, rect, -1);
 }

 NSView eventView () {
 	return contentView;
 }

 public Rectangle getClientArea () {
 	checkWidget();
 	NSRect rect = contentView.bounds();
 	int width = Math.max (0, (int) rect.width - hMargin * 2);
 	int height = Math.max (0, (int) rect.height - vMargin * 2);
 	return new Rectangle((int)(rect.x) + hMargin, (int)(rect.y) + vMargin, width, height);
 }

 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 isTransparent() {
 	return true;
 }

 float getThemeAlpha () {
 	return (background != null ? 1 : 0.25f) * parent.getThemeAlpha ();
 }

 void register () {
 	super.register ();
 	display.addWidget (contentView, this);
 	SWTBox box = (SWTBox)view;
 	display.addWidget (box.titleCell(), this);
 }

 void releaseHandle () {
 	super.releaseHandle ();
 	if (contentView != null) contentView.release();
 	contentView = null;
 }

 void resized() {
 	if (!ignoreResize) super.resized();
 }

 void setFont(NSFont font) {
 	((NSBox) view).setTitleFont(font);
 }

 void setForeground (float /*double*/ [] color) {
 	NSColor nsColor;
 	if (color == null) {
 		nsColor = NSColor.textColor ();
 	} else {
 		nsColor = NSColor.colorWithDeviceRed (color[0], color[1], color[2], 1);
 	}
 	NSTextFieldCell cell = new NSTextFieldCell (((NSBox)view).titleCell ().id);
 	cell.setTextColor (nsColor);
 }

 void setOrientation () {
 	int direction = (style & SWT.RIGHT_TO_LEFT) != 0 ? OS.NSWritingDirectionRightToLeft : OS.NSWritingDirectionLeftToRight;
 	NSTextFieldCell cell = new NSTextFieldCell (((NSBox)view).titleCell ().id);
 	cell.setBaseWritingDirection(direction);
 }

 /**
  * 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 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
  * '&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 [] buffer = new char [text.length ()];
 	text.getChars (0, buffer.length, buffer, 0);
 	int length = fixMnemonic (buffer);
 	NSBox box = (NSBox)view;
 	box.setTitlePosition(length == 0 ? OS.NSNoTitle : OS.NSAtTop);
 	box.setTitle(NSString.stringWithCharacters(buffer, length));
 }

 }
	/*******************************************************************************
	* 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.graphics.*;
	import org.eclipse.swt.internal.cocoa.*;

	/**
	* 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 {
	NSView contentView;
	String text = "";
	boolean ignoreResize;
	int hMargin, vMargin;

	/**
	* 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 Rectangle computeTrim (int x, int y, int width, int height) {
	checkWidget ();
	NSBox widget = (NSBox)view;
	NSRect newRect = new NSRect();
	newRect.x = x;
	newRect.y = y;
	newRect.width = width;
	newRect.height = height;
	NSRect oldRect = widget.frame();
	ignoreResize = true;
	widget.setFrameFromContentFrame(newRect);
	newRect = widget.frame();
	widget.setFrame(oldRect);
	ignoreResize = false;
	x = (int) Math.ceil(newRect.x) - hMargin;
	y = (int) Math.ceil(newRect.y) - vMargin;
	width = (int) Math.ceil(newRect.width) + (hMargin * 2);
	height = (int) Math.ceil(newRect.height) + (vMargin * 2);
	return super.computeTrim(x, y, width, height);
	}

	NSView contentView () {
	return contentView;
	}

	void createHandle () {
	state \|= THEME_BACKGROUND;
	NSBox widget = (NSBox)new SWTBox().alloc();
	widget.init();
	widget.setTitlePosition(OS.NSNoTitle);
	NSSize margins = widget.contentViewMargins();
	hMargin = (int) margins.width;
	vMargin = (int) margins.height;
	widget.setContentViewMargins(new NSSize());

	NSView contentWidget = (NSView)new SWTView().alloc();
	contentWidget.init();
	// contentWidget.setDrawsBackground(false);
	widget.setContentView(contentWidget);
	contentView = contentWidget;
	view = widget;
	}

	NSFont defaultNSFont () {
	return display.boxFont;
	}

	void deregister () {
	super.deregister ();
	display.removeWidget (contentView);
	SWTBox box = (SWTBox)view;
	display.removeWidget (box.titleCell());
	}

	void drawBackground (int /long/ id, NSGraphicsContext context, NSRect rect) {
	if (id != view.id) return;
	fillBackground (view, context, rect, -1);
	}

	NSView eventView () {
	return contentView;
	}

	public Rectangle getClientArea () {
	checkWidget();
	NSRect rect = contentView.bounds();
	int width = Math.max (0, (int) rect.width - hMargin * 2);
	int height = Math.max (0, (int) rect.height - vMargin * 2);
	return new Rectangle((int)(rect.x) + hMargin, (int)(rect.y) + vMargin, width, height);
	}

	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 isTransparent() {
	return true;
	}

	float getThemeAlpha () {
	return (background != null ? 1 : 0.25f) * parent.getThemeAlpha ();
	}

	void register () {
	super.register ();
	display.addWidget (contentView, this);
	SWTBox box = (SWTBox)view;
	display.addWidget (box.titleCell(), this);
	}

	void releaseHandle () {
	super.releaseHandle ();
	if (contentView != null) contentView.release();
	contentView = null;
	}

	void resized() {
	if (!ignoreResize) super.resized();
	}

	void setFont(NSFont font) {
	((NSBox) view).setTitleFont(font);
	}

	void setForeground (float /double/ [] color) {
	NSColor nsColor;
	if (color == null) {
	nsColor = NSColor.textColor ();
	} else {
	nsColor = NSColor.colorWithDeviceRed (color[0], color[1], color[2], 1);
	}
	NSTextFieldCell cell = new NSTextFieldCell (((NSBox)view).titleCell ().id);
	cell.setTextColor (nsColor);
	}

	void setOrientation () {
	int direction = (style & SWT.RIGHT_TO_LEFT) != 0 ? OS.NSWritingDirectionRightToLeft : OS.NSWritingDirectionLeftToRight;
	NSTextFieldCell cell = new NSTextFieldCell (((NSBox)view).titleCell ().id);
	cell.setBaseWritingDirection(direction);
	}

	/**
	* 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);
	text = string;
	char [] buffer = new char [text.length ()];
	text.getChars (0, buffer.length, buffer, 0);
	int length = fixMnemonic (buffer);
	NSBox box = (NSBox)view;
	box.setTitlePosition(length == 0 ? OS.NSNoTitle : OS.NSAtTop);
	box.setTitle(NSString.stringWithCharacters(buffer, length));
	}

	}