package bluej.utility.javafx;

import javafx.scene.canvas.Canvas;




| A simple extenstion of the JavaFX Canvas class that allows the Canvas
| to be resized.  You can also specify an action to be run on resize
| (typically, a redraw action).
|
public class ResizableCanvas
extends Canvas{    
   protected FXRunnable onResize;

   
   public ResizableCanvas()
   {
      this(null);     
      }

   
   


| Supply an optional action to be run when the canvas is resized.
|
| @param onResize If not null, will be runs whenever the canvas is resized.
|
public ResizableCanvas(FXRunnable onResize)
   {        
      this.onResize = onResize;     
      }

   
   @Override
   
   public boolean isResizable()
   {        
      return true;     
      }

   
   @Override
   
   public void resize(double width, double height)
   {
      setWidth(width);
      setHeight(height);
      if (onResize != null)
      onResize.run();     
      }

   
   @Override
   
   public double minWidth(double height)
   {        
      return 0;     
      }

   
   @Override
   
   public double minHeight(double width)
   {        
      return 0;     
      }

   
   @Override
   
   public double prefWidth(double height)
   {        
      return 0;     
      }

   
   @Override
   
   public double prefHeight(double width)
   {        
      return 0;     
      }

   
   @Override
   
   public double maxWidth(double height)
   {        
      return Double.MAX_VALUE;     
      }

   
   @Override
   
   public double maxHeight(double width)
   {        
      return Double.MAX_VALUE;     
      } 
   }