moduletreeeditpart.java

一个eclipse插件源代码。用于web开发

/*
 * $Header: /home/cvs/WEBPUMP2.0/WebPumpIDE_Src/WebPumpIDE/src/com/webpump/ui/gefmodule/edit/ModuleTreeEditPart.java,v 1.1.1.1 2004/07/01 09:07:47 wang_j Exp $
 * $Revision: 1.1.1.1 $
 * $Date: 2004/07/01 09:07:47 $
 *
 * ====================================================================
 *
 * The NanJing HopeRun(IT-FOREST) Software License, Version 2.0.0
 *
 * Copyright 2003-2004 by NanJing HopeRun(IT-FOREST) Information System Co., Ltd, CHINA and
 *                        IT Forest Corporation
 * All rights reserved.
 *
 * This software is the confidential and proprietary information of
 * HopeRun(IT-FOREST) Information System Co., Ltd, CHINA and IT Forest Corporation.
 * You shall not disclose such Confidential Information and shall use it only in
 * accordance with the terms of the license agreement you entered into with
 * HopeRun(IT-FOREST) Information System Co., Ltd, CHINA and IT Forest Corporation.
 */

package com.webpump.ui.gefmodule.edit;

import java.util.*;
import java.beans.*;

import org.eclipse.swt.widgets.TreeItem;
import org.eclipse.swt.widgets.Tree;
import org.eclipse.swt.graphics.Image;

import org.eclipse.gef.*;

import com.webpump.ui.gefmodule.model.ModelSubpart;
import com.webpump.ui.gefmodule.model.Module;

/**
 * Class for ModuleTreeEditPart
 * 
 * @author shi_l
 * @version 2.0.0 2004-5-30
 */
public class ModuleTreeEditPart
	extends org.eclipse.gef.editparts.AbstractTreeEditPart
	implements PropertyChangeListener {

	/**
	 * Constructor initializes this with the given model.
	 *
	 * @param model  Model for this.
	 */
	public ModuleTreeEditPart(Object model) {
		super(model);
	}

	public void activate() {
		super.activate();
		getModelSubpart().addPropertyChangeListener(this);
	}

	/**
	 * Creates and installs pertinent EditPolicies
	 * for this.
	 */
	protected void createEditPolicies() {
		EditPolicy component;
		component = new ModelElementEditPolicy();
		installEditPolicy(EditPolicy.COMPONENT_ROLE, component);
		installEditPolicy(EditPolicy.PRIMARY_DRAG_ROLE, new ModuleTreeEditPolicy());
	}

	public void deactivate() {
		getModelSubpart().removePropertyChangeListener(this);
		super.deactivate();
	}

	/**
	 * Returns the model of this as a LogicSubPart.
	 *
	 * @return Model of this.
	 */
	protected ModelSubpart getModelSubpart() {
		return (ModelSubpart) getModel();
	}

	/**
	 * Returns <code>null</code> as a Tree EditPart holds
	 * no children under it.
	 *
	 * @return <code>null</code>
	 */
	protected List getModelChildren() {
		return Collections.EMPTY_LIST;
	}

	public void propertyChange(PropertyChangeEvent change) {
		if (change.getPropertyName().equals(Module.CHILDREN))
			refreshChildren();
		else
			refreshVisuals();
	}

	/**
	 * Refreshes the Widget of this based on the property
	 * given to update. All major properties are updated
	 * irrespective of the property input.
	 *
	 * @param property  Property to be refreshed.
	 */
	protected void refreshVisuals() {
		if (getWidget() instanceof Tree)
			return;
		Image image = getModelSubpart().getIcon();
		TreeItem item = (TreeItem) getWidget();
		if (image != null)
			image.setBackground(item.getParent().getBackground());
		setWidgetImage(image);
		setWidgetText(getModelSubpart().toString());
	}

}