baseeditpart.java

对eclipse gef进行封装,可以生成图形化编辑器

/*******************************************************************************
 * $Header: /cvsroot/EOS6/work_dir/niegy/com.primeton.studio.gef.ui/src/com/primeton/studio/gef/ui/parts/BaseEditPart.java,v 1.3 2006/12/08 07:04:32 niegy Exp $
 * $Revision: 1.3 $
 * $Date: 2006/12/08 07:04:32 $
 *
 *==============================================================================
 *
 * Copyright (c) 2001-2006 Primeton Technologies, Ltd.
 * All rights reserved.
 * 
 * Created on 2006-11-21
 *******************************************************************************/


package com.primeton.studio.gef.ui.parts;

import org.eclipse.draw2d.IFigure;
import org.eclipse.draw2d.Label;
import org.eclipse.draw2d.MarginBorder;
import org.eclipse.draw2d.text.TextFlow;
import org.eclipse.gef.DragTracker;
import org.eclipse.gef.EditPolicy;
import org.eclipse.gef.Request;
import org.eclipse.gef.RequestConstants;
import org.eclipse.gef.editpolicies.DirectEditPolicy;
import org.eclipse.gef.tools.DirectEditManager;
import org.eclipse.gef.tools.SelectEditPartTracker;

import com.primeton.studio.gef.ui.editor.AbstractGraphicalEditor;
import com.primeton.studio.gef.ui.figure.SelectableLabel;
import com.primeton.studio.gef.ui.ui.policy.LabelSelectionEditPolicy;

/**
 * TODO 此处填写 class 信息
 *
 * @author niegy (mailto:[e-mail])
 */
/*
 * 修改历史
 * $Log: BaseEditPart.java,v $
 * Revision 1.3  2006/12/08 07:04:32  niegy
 * 重构代码
 *
 * Revision 1.2  2006/12/05 05:18:59  niegy
 * 修改模型，增加连线的扩展点
 *
 * Revision 1.1  2006/11/22 07:07:38  niegy
 * 增加table
 * 
 */
public abstract class BaseEditPart extends ChildEditPart {

	protected DirectEditManager manager;
	private AbstractGraphicalEditor fEdtor;
	/**
	 * @param editor
	 */
	public BaseEditPart(AbstractGraphicalEditor editor) {
		super(editor);
		// TODO Auto-generated constructor stub
		fEdtor = editor;
	}

	public AbstractGraphicalEditor getEditor(){
		return fEdtor;
	}
	protected abstract DirectEditPolicy createDirectEditPolicy();

	/* (non-Javadoc)
	 * @see com.primeton.studio.gef.ui.parts.NodeEditPartEx#createEditPolicies()
	 */
	
	protected void createEditPolicies() {
		// TODO Auto-generated method stub
		super.createEditPolicies();
		installEditPolicy(EditPolicy.DIRECT_EDIT_ROLE, createDirectEditPolicy());
		installEditPolicy(EditPolicy.SELECTION_FEEDBACK_ROLE, new LabelSelectionEditPolicy());
	}

	/* (non-Javadoc)
	 * @see com.primeton.studio.gef.ui.parts.NodeEditPartEx#createFigure()
	 */
	
	protected IFigure createFigure() {
		// TODO Auto-generated method stub
		IFigure fig = new SelectableLabel();
		fig.setBorder(new MarginBorder(0, 1, 0, 0));
		return fig;
	}
	
	IFigure getDirectEditFigure() {
		return getFigure();
	}
	
	String getDirectEditText() {
		IFigure fig = getDirectEditFigure();
		if (fig instanceof Label) {
			return ((Label)fig).getText();
		} else if (fig instanceof TextFlow) {
			return ((TextFlow)fig).getText();
		}
		return ""; //$NON-NLS-1$
	}

	/* (non-Javadoc)
	 * @see org.eclipse.gef.editparts.AbstractGraphicalEditPart#getDragTracker(org.eclipse.gef.Request)
	 */	
	public DragTracker getDragTracker(Request request) {
		// TODO Auto-generated method stub
		return new SelectEditPartTracker(this);
	}
	
	protected void performDirectEdit() {
		if(manager == null)
			manager = new LabelDirectEditManager(this,
					new LabelCellEditorLocator(getDirectEditFigure()));
		manager.show();
	}
	
	public void performRequest(Request request) {
		if (request.getType() == RequestConstants.REQ_DIRECT_EDIT)
			performDirectEdit();
		else
			super.performRequest(request);
	}
}