TreeLabelProvider.java

/*******************************************************************************
 * 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.gef.ui.stackview;

import org.eclipse.swt.graphics.Image;

import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.viewers.ILabelProvider;
import org.eclipse.jface.viewers.ILabelProviderListener;

import org.eclipse.gef.commands.Command;
import org.eclipse.gef.commands.CommandStack;

/**
 * Internal class used for a debug view.
 * @deprecated this class will be deleted
 */
public class TreeLabelProvider
	implements org.eclipse.jface.viewers.ILabelProvider
{

/** The CommandStack **/
protected CommandStack stack = null;
/** Icons associated with a TreeLabelProvider **/
protected static Image 
	yesIcon = ImageDescriptor.createFromFile(
			TreeLabelProvider.class, 
			"icons/YESGRN.gif").createImage(), //$NON-NLS-1$
	noIcon  = ImageDescriptor.createFromFile(TreeLabelProvider.class, 
			"icons/NORED.gif").createImage(); //$NON-NLS-1$
/** Label style constants **/
public static byte NORMAL_LABEL_STYLE = 2,
			  	   DEBUG_LABEL_STYLE = 3;

/** Label style, NORMAL_LABEL_STYLE by default **/
protected byte labelStyle = NORMAL_LABEL_STYLE;

/**
 * Creates a new TreeLabelProvider with the given CommandStack
 * @param stack the CommandStack
 */
public TreeLabelProvider(CommandStack stack) {
	this.stack = stack;	
}

/**
 * @see org.eclipse.jface.viewers.IBaseLabelProvider#addListener(ILabelProviderListener)
 */
public void addListener(ILabelProviderListener l) { }

/**
 * @see org.eclipse.jface.viewers.IBaseLabelProvider#dispose()
 */
public void dispose() { }

/**
 * @see org.eclipse.jface.viewers.ILabelProvider#getImage(java.lang.Object)
 */
public Image getImage(Object o) {
	if (o instanceof Command) {
		Command command = (Command)o;
//		if(((DefaultCommandStack)stack).canUndoCommand(command)) 
//			return yesIcon;
//		if(((DefaultCommandStack)stack).canRedoCommand(command)) 
//			return noIcon;
		if (command.canUndo())
			return yesIcon;
		else
			return noIcon;
	}
	return null;
}

/**
 * Returns the label style of this TreeLabelProvider.
 * @return the label style
 */
public byte getLabelStyle() {
	return labelStyle;
}

/**
 * @see ILabelProvider#getText(java.lang.Object)
 */
public String getText(Object o) {
	if (o instanceof CommandStack)
		return "Command Stack";//$NON-NLS-1$
	if (o instanceof Command) {
		if (getLabelStyle() == NORMAL_LABEL_STYLE)
			if (((Command)o).getLabel() == null)
				return "";//$NON-NLS-1$
			else
				return ((Command)o).getLabel();
		if (getLabelStyle() == DEBUG_LABEL_STYLE)
			if (((Command)o).getDebugLabel() == null)
				return "";//$NON-NLS-1$
			else
				return ((Command)o).getDebugLabel();
	}
	if (o instanceof Command)
			return ((Command)o).getLabel();
	return "???";//$NON-NLS-1$
}

/**
 * @see org.eclipse.jface.viewers.IBaseLabelProvider#isLabelProperty(
 * 													java.lang.Object, java.lang.String)
 */
public boolean isLabelProperty(Object element, String property) { return false; }

/**
 * @see org.eclipse.jface.viewers.IBaseLabelProvider#removeListener(
 * 										org.eclipse.jface.viewers.ILabelProviderListener)
 */
public void removeListener(ILabelProviderListener l) { }

/**
 * Sets the labelStyle to the passed value
 * @param labelStyle the label style
 */
public void setLabelStyle(byte labelStyle) {
	this.labelStyle = labelStyle;
}

}