deletearrowaction.java

一个可视化编辑器的基础结构

package org.goshawk.workflow.GUI.Action;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import org.goshawk.workflow.GUI.Display.EditorCanvas;
import org.goshawk.workflow.GUI.Display.EditorFrame;
import org.goshawk.workflow.GUI.Display.ShapeMap;
import org.goshawk.workflow.GUI.ShapeShell.ArrowShell;
import org.goshawk.workflow.GUI.ShapeShell.ShapeShell;

public class DeleteArrowAction implements ActionListener
{
	private EditorCanvas canvas = EditorFrame.getCanvas();
	private ShapeMap shapeMap = canvas.getShapeMap();
	private ArrowShell arrow = null;

	public DeleteArrowAction(ShapeShell shape)
	{
		this.arrow = (ArrowShell)shape;
	}
	
	public void actionPerformed(ActionEvent e)
	{
		ShapeShell origin = arrow.getStartNode();
		ShapeShell target = arrow.getEndNode();
		origin.removeOtherShape(target.getId());
		shapeMap.remove(origin.getId()+target.getId());
		canvas.repaint();
	}

}