package bluej.utility.javafx;

import javafx.animation.KeyFrame;
import javafx.animation.KeyValue;
import javafx.animation.Timeline;
import javafx.beans.property.SimpleDoubleProperty;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.scene.control.TextField;
import javafx.scene.text.Font;
import javafx.util.Duration;

import bluej.stride.generic.Frame;




| A class that is a Label with the added capability of scaling its vertical height
| from a factor of 0.0 (i.e. hidden) up to 1.0 (i.e. full size for the label).
|
public class ScalableHeightTextField
extends TextField{    
   private final SimpleDoubleProperty scale = new SimpleDoubleProperty(1.0);
    
   
   public ScalableHeightTextField(String text)
   {
      this(text, false);     
      }
    
   
   


|
| @param text
| @param startHidden
|
public ScalableHeightTextField(String text, boolean startHidden)
   {
      super(text);
      setMinHeight(0);
      if (startHidden)
       {
         setPrefHeight(0);
         scale.set(0.0);         
         }
       
      scale.addListener(new ChangeListener<Number>()
       {            
         @Override
           
         public void changed(ObservableValue<? extends Number> arg0,
                               
         Number arg1, Number newVal)
           {
            setPrefHeight(newVal.doubleValue() * computePrefHeight(9999));             
            }         
         });
      JavaFXUtil.workAroundFunctionKeyBug(this);     
      }
    
   
   public void setToFullHeight()
   {
      scale.set(1.0);     
      }
    
   
   public void setToNothing()
   {
      scale.set(0.0);     
      }

   
   


| Animates up to scale height of 1.0
| @param dur Duration of transition.  Null means immediate
| @return
|
public Timeline getGrowToFullHeightTimeline(Duration dur)
   {        
      return new Timeline(new KeyFrame(dur, new KeyValue(scale, 1.0)));     
      }
    
   
   public Timeline getShrinkToNothingTimeline(Duration dur)
   {        
      return new Timeline(new KeyFrame(dur, new KeyValue(scale, 0.0)));     
      }

   
   public void animateToFromMonospace(boolean toMonospace, boolean zeroWidthWhenEmpty, SharedTransition animate)
   {
      if (toMonospace)
       {
         Font monospace = Font.font("monospace", getFont().getSize());
         double origWidth = getWidth();
         double targetWidth = zeroWidthWhenEmpty ? 0.0 : JavaFXUtil.measureString(this, getText(), monospace, true, true );
         minWidthProperty().bind(animate.getProgress().multiply(targetWidth - origWidth).add(origWidth));         
         }
       

      else
       {
         double origWidth = getWidth();
         applyCss();
           
         
         double targetWidth = JavaFXUtil.measureString(this, getText(), getFont(), true, true);
         minWidthProperty().unbind();
         minWidthProperty().bind(animate.getProgress().multiply(targetWidth - origWidth).add(origWidth));
         animate.addOnStopped(() -> {
         minWidthProperty().unbind();
         setMinWidth(0);             
         });
      }     
   } 
}