package awb;

import java.awt.*;

public class DrawingPad 
{
  Graphics g;
  int x,y,dx,w,h;
  int maxh;
  float wr,hr;

  public DrawingPad(Canvas c)
  {
    Dimension d = c.size();
    init(c.getGraphics(),0,0,1,d.width,d.height,d.width,d.height);
    c.setBackground(Color.white);
  }

  public void moveTo(int x, int y)
  {
    this.x = x;
    this.y = -y;
  }

  public void clear()
  {
    setColor(Color.white);
    g.fillRect(0,0,w,maxh);
  }
  
  public DrawingPad(Graphics g, int x, int y, int dx, int w, int h, int aw, int ah)
  {
    init(g,x,y,dx,w,h,aw,ah);
  }

  public void init(Graphics g, int x, int y, int dx, int w, int h, int aw, int ah)
  {
    this.g = g;
    this.x = x;
    this.y = y;
    this.dx = dx;
    this.w = w;
    this.h = h;
    this.wr = (float)w/aw;
    this.hr = (float)h/ah;
    this.maxh = h;

    if (this.dx>0) {
      this.dx = 0;
    } else {
      this.dx = -this.w;
    }
  }

  public void setColor(Color c)
  {
    g.setColor(c);
  }

  public void border(Color c)
  {
    g.setColor(c);
    g.drawRect(x,y,w,h);
  }

  public void age(float a)
  {
    g.setColor(new Color(a,(float)0.0,(float)0.0));
    fillRectangle(0,0,10,50);
  }

  public void setColor(double red, double green, double blue)
  {
    g.setColor(new Color((float)red,(float)green,(float)blue));
  }

  public void drawLine(int x1, int y1, int x2, int y2) 
  {
    g.drawLine(x+Math.abs(dx+(int)(x1*wr)), y+h-(int)(y1*hr),
	       x+Math.abs(dx+(int)(x2*wr)), y+h-(int)(y2*hr));
	       
  }

  public void fillOval(int x1, int y1, int w1, int h1) 
  {
    if (dx==0) {
      g.fillOval(x+(int)(x1*wr),y+h-(int)(y1*hr+h1*hr),(int)(w1*wr),(int)(h1*hr));
    } else {
      g.fillOval(x+(-dx-(int)(x1*wr+w1*wr)),y+h-(int)(y1*hr+h1*hr),(int)(w1*wr),(int)(h1*hr));
    }
  }

  public void drawOval(int x1, int y1, int w1, int h1) 
  {
    if (dx==0) {
      g.drawOval(x+(int)(x1*wr),y+h-(int)(y1*hr+h1*hr),(int)(w1*wr),(int)(h1*hr));
    } else {
      g.drawOval(x+(-dx-(int)(x1*wr+w1*wr)),y+h-(int)(y1*hr+h1*hr),(int)(w1*wr),(int)(h1*hr));
    }
  }

  public void fillRectangle(int x1, int y1, int w1, int h1) 
  {
    if (dx==0) {
      g.fillRect(x+(int)(x1*wr),y+h-(int)(y1*hr+h1*hr),(int)(w1*wr),(int)(h1*hr));
    } else {
      g.fillRect(x+(-dx-(int)(x1*wr+w1*wr)),y+h-(int)(y1*hr+h1*hr),(int)(w1*wr),(int)(h1*hr));
    }
  }

  public void drawRectangle(int x1, int y1, int w1, int h1) 
  {
    if (dx==0) {
      g.drawRect(x+(int)(x1*wr),y+h-(int)(y1*hr+h1*hr),(int)(w1*wr),(int)(h1*hr));
    } else {
      g.drawRect(x+(-dx-(int)(x1*wr+w1*wr)),y+h-(int)(y1*hr+h1*hr),(int)(w1*wr),(int)(h1*hr));
    }
  }

  public void fillTriangle(int x1, int y1,
			   int x2, int y2,
			   int x3, int y3)
  {
    Polygon p = new Polygon();
    p.addPoint(x+Math.abs(dx+(int)(x1*wr)), y+h-(int)(y1*hr));
    p.addPoint(x+Math.abs(dx+(int)(x2*wr)), y+h-(int)(y2*hr));
    p.addPoint(x+Math.abs(dx+(int)(x3*wr)), y+h-(int)(y3*hr));
    g.fillPolygon(p);
  }

  public void drawTriangle(int x1, int y1,
			   int x2, int y2,
			   int x3, int y3)
  {
    Polygon p = new Polygon();
    p.addPoint(x+Math.abs(dx+(int)(x1*wr)), y+h-(int)(y1*hr));
    p.addPoint(x+Math.abs(dx+(int)(x2*wr)), y+h-(int)(y2*hr));
    p.addPoint(x+Math.abs(dx+(int)(x3*wr)), y+h-(int)(y3*hr));
    g.drawPolygon(p);
  }

}