java2dutil.java

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package it.businesslogic.ireport.util;

import java.awt.*;
import java.awt.geom.*;
import java.util.*;

public class Java2DUtil
{
  private static Stack clipBoundsStack = new Stack();
  private static Stack transforms = new Stack();

  public static void setClip(Graphics g, int x, int y, int width, int height)
  {
    setClip(g, new Rectangle(x, y, width, height));
  }

  public static void setClip(Graphics g, Rectangle clipBounds)
  {
    Rectangle currentClipBounds;

    clipBounds = new Rectangle(clipBounds);
    clipBounds.width += 1;
    clipBounds.height += 1;

    currentClipBounds = g.getClipBounds();
    if(currentClipBounds != null)
    {
      clipBounds = clipBounds.intersection(g.getClipBounds());
    }

    clipBoundsStack.push(currentClipBounds);
    g.setClip(clipBounds);
  }

  public static void resetClip(Graphics g)
  {
    g.setClip((Shape) clipBoundsStack.pop());
  }
  
    public static void setTransform(Graphics2D g2, AffineTransform transform)
  {
    AffineTransform current;


    current = g2.getTransform();
    transforms.push(current);
    g2.setTransform(transform);
  }


  public static void resetTransform(Graphics2D g2)
  {
    if(transforms.empty())
    {
      return;
    }


    g2.setTransform((AffineTransform) transforms.pop());
  }
}