package MaxFlowApplet.graphic;

import MaxFlowApplet.graph.*;
import java.awt.*;

/* The class extends the FlowVretex class with functions for drawing *
 * the vertex. A vertex is represented as a 3D rectangular, that     *
 * seems as a button, and may be drawn as pushed or released in diff-* 
 * erent locations, colors and sizes (not all the options are used   *
 * as present).                                                      */ 

public class GraphicVertex extends FlowVertex  {

    public GraphicVertex(int x, int y)
    {
	base = new Point(x - sideLength/2, y - sideLength/2);
	center = new Point(x, y);
	pressed = false;
	color = DEFAULTCOLOR;
    }
    public void setColor(Color newColor)
    {
        color = newColor;
    };
    public Color getColor()
    {
        return color;
    };
    public Point getPosition()
    {
        return center;
    };
    public int getSideLength()
    {
        return sideLength;
    };
    public void setSideLength(int n)
    {
	sideLength = n;
    };

    public boolean isPressed()
    {
        return pressed;
    };
    public void release()
    {
        pressed = false;
    }
    public void press()
    {
        pressed = true;
    };
    public boolean inside(int x, int y)
    {
	return (base.x <= x && base.x+sideLength >= x &&
	        base.y <= y && base.y+sideLength >= y);
    }
    public void moveTo(int x, int y)
    {
        center = new Point(x,y);
        base.x = center.x - (sideLength / 2);
        base.y = center.y - (sideLength / 2);
    };

    protected void updateEdges()
    {
        Edge e;
        int n;

        n = fanOut();
        for(int i = 0; i < n; i++)
	   ((GraphicEdge) getEdgeOut(i)).updateArrowLocation();
        n = fanIn();
        for(int i = 0; i < n; i++)
            ((GraphicEdge) getEdgeIn(i)).updateArrowLocation();
    }

    /* In some situations, a vertex have to remember some position,    *
     * in order to go back to it later. The next two methods does that */
    public void storeOriginalPosition()
    {
        originalPosition = new Point(center.x, center.y);
    }

    public void moveToOriginalPosition()
    {
        moveTo(originalPosition.x, originalPosition.y);
    }

    public void draw(Graphics g)
    {
        g.setColor(color);
    	g.fill3DRect( base.x, base.y, sideLength, sideLength, !pressed);
    }

    protected Point base;
    protected Color color;
    protected Point center;
    protected Point originalPosition;
    protected int sideLength = 15;
    protected boolean pressed = false;
    protected static final Color DEFAULTCOLOR = Color.gray;
};