package bluej.editor.stride;

import javafx.beans.binding.Bindings;
import javafx.beans.value.ObservableDoubleValue;
import javafx.beans.value.ObservableValue;
import javafx.scene.Node;
import javafx.scene.layout.Pane;
import javafx.scene.layout.Region;




| A WindowOverlayPane is as big as the editor window (well, the scrollpane part),
| and sits on top of the window contents.  It is useful if you have an overlay
| which should have its position fixed with respect to the window, for example
| the pinned method header mechanism.  If you want an overlay fixed with respect to
| an item inside the scroll pane (e.g. a tooltip or autocomplete beneath a slot),
| use CodeOverlayPane instead.
|
public class WindowOverlayPane
{       
private final Pane pane = new Pane();
    
   
   public WindowOverlayPane()
   {        
      
      pane.pickOnBoundsProperty().set(false);     
      }

   
   public void addOverlay(Node node, ObservableDoubleValue x, ObservableDoubleValue y)
   {
      addOverlay(node, x, y, false);     
      }
    
   
   public void addOverlay(Node node, ObservableDoubleValue x, ObservableDoubleValue y, boolean moveLeftIfNeeded)
   {
      pane.getChildren().add(node);
      if (moveLeftIfNeeded)
       {
         node.layoutXProperty().bind(Bindings.min(x, pane.widthProperty().subtract(((Region)node).widthProperty())));         
         }
       

      else
       {
         node.layoutXProperty().bind(x);         
         }
      node.layoutYProperty().bind(y);      
      }

   
   public void removeOverlay(Node node)
   {
      pane.getChildren().remove(node);             
      }

   
   public double sceneXToWindowOverlayX(double sceneX)
   {
      return pane.sceneToLocal(sceneX, 0).getX();     
      }

   
   public double sceneYToWindowOverlayY(double sceneY)
   {
      return pane.sceneToLocal(0, sceneY).getY();     
      }
    
   
   public Node getNode()
   {        
      return pane;     
      }

   
   public boolean contains(Node node)
   {
      return pane.getChildren().contains(node);     
      } 
   }