package bluej.utility.javafx;

import javafx.beans.property.DoubleProperty;
import javafx.geometry.Orientation;
import javafx.scene.shape.Polygon;
import javafx.scene.transform.Scale;




| A triangle arrow shape, used for foldout panes.
|
public class TriangleArrow
extends Polygon{    
   
   public static final double TRIANGLE_BASE = 14;
   
   public static final double TRIANGLE_DEPTH = 10;
   
   private final Scale scale;
   
   private final Orientation orientation;

   
   


| Makes a triangle arrow, used in foldout containers.
|
| @param orientation The orientation.  VERTICAL makes a triangle arrow pointed upwards, HORIZONTAL makes one pointed leftwards.
|
public TriangleArrow(Orientation orientation)
   {
      JavaFXUtil.addStyleClass(this, "triangle-arrow");
       
      scale = new Scale(1.0, 1.0);
       
      this.orientation = orientation;
      switch (orientation)
       {            
         case HORIZONTAL:
         getPoints().setAll(
                   
         TRIANGLE_DEPTH - 1, 1.0,
                   
         1.0, TRIANGLE_BASE * 0.5,
                   
         TRIANGLE_DEPTH - 1, TRIANGLE_BASE - 1);
         scale.setPivotX(TRIANGLE_DEPTH * 0.5);
         scale.setPivotY(TRIANGLE_BASE * 0.5);
               
         break;
           
         case VERTICAL:
         getPoints().setAll(
                   
         1.0, TRIANGLE_DEPTH - 1,
                   
         TRIANGLE_BASE * 0.5, 1.0,
                   
         TRIANGLE_BASE - 1, TRIANGLE_DEPTH - 1);
         scale.setPivotX(TRIANGLE_BASE * 0.5);
         scale.setPivotY(TRIANGLE_DEPTH * 0.5);
               
         break;         
         }

      getTransforms().add(scale);
       
      
      
      
      
      setPickOnBounds(true);     
      }

   
   


| The scale property.  Setting this to 1.0 leaves the arrow normal,
| i.e. facing up/left, while setting it to -1.0 reverses it,
| making it face down/right.  You can either set it instantly, or animate
| the transition.
|
public DoubleProperty scaleProperty()
   {
      if (orientation == Orientation.HORIZONTAL)
      return scale.xProperty();
       
      else{ return scale.yProperty();
         }     
      } 
   }