package greenfoot.guifx;

import javafx.scene.control.Button;
import javafx.scene.control.ScrollPane;
import javafx.scene.layout.Pane;
import threadchecker.OnThread;
import threadchecker.Tag;




| The content pane for GreenfootStage.  This needs to be a custom pane to get the layout
| algorithm implemented as we want.
|
@OnThread(Tag.FXPlatform)
class GreenfootStageContentPane
extends Pane{    
   private static final int CLASS_DIAGRAM_PADDING = 12;
   
   private static final int IDEAL_WORLD_PADDING = 30;
   
   private final Pane worldViewScroll;
   
   private final Button shareButton;
   
   private final ScrollPane classDiagramScroll;
   
   private final Pane controlPanel;

   
   


| Construct a content pane for the three major components: the world view,
| the class diagram, and the control panel.
|
public GreenfootStageContentPane(Pane worldViewScroll, Button shareButton, ScrollPane classDiagramScroll, ControlPanel controlPanel)
   {        
      this.worldViewScroll = worldViewScroll;
       
      this.shareButton = shareButton;
       
      this.classDiagramScroll = classDiagramScroll;
       
      this.controlPanel = controlPanel;
      getChildren().addAll(worldViewScroll, shareButton, classDiagramScroll, controlPanel);     
      }

   
   @Override
   @OnThread(value = Tag.FXPlatform, ignoreParent = true)
   
   protected void layoutChildren()
   {
      final double ourWidth = getWidth();
      final double ourHeight = getHeight();
        
      final double idealWorldWidth = worldViewScroll.prefWidth(-1);

       
      
      final double shareButtonWidth = shareButton.prefWidth(-1);
      final double shareButtonHeight = shareButton.prefHeight(-1);
        
       
      
      final double classDiagramHeight = ourHeight - 3 * CLASS_DIAGRAM_PADDING - shareButtonHeight;
      final double idealClassDiagramWidth = classDiagramScroll.prefWidth(classDiagramHeight);
        
       
      double classDiagramWidth;
      if (idealClassDiagramWidth + 2 * CLASS_DIAGRAM_PADDING + idealWorldWidth > ourWidth)
       {            
         
         double minClassDiagramWidth = classDiagramScroll.minWidth(classDiagramHeight);
         classDiagramWidth = Math.max(minClassDiagramWidth, 
               
         ourWidth - idealWorldWidth - 2 * CLASS_DIAGRAM_PADDING);         
         }
       

      else
       {            
         
         classDiagramWidth = idealClassDiagramWidth;         
         }
       
      
      
      classDiagramWidth = Math.max(classDiagramWidth, shareButtonWidth + 2 * CLASS_DIAGRAM_PADDING);
        
       
      
      final double worldWidth = ourWidth - (classDiagramWidth + 2 * CLASS_DIAGRAM_PADDING);
      final double controlPanelHeight = controlPanel.prefHeight(worldWidth);
        
      worldViewScroll.resizeRelocate(0, 0, worldWidth, ourHeight - controlPanelHeight);
      shareButton.resizeRelocate(worldWidth + CLASS_DIAGRAM_PADDING, CLASS_DIAGRAM_PADDING,
               
      classDiagramWidth, shareButtonHeight);
      classDiagramScroll.resizeRelocate(worldWidth + CLASS_DIAGRAM_PADDING, 
               
      2 * CLASS_DIAGRAM_PADDING + shareButtonHeight,
               
      classDiagramWidth, classDiagramHeight);
      controlPanel.resizeRelocate(0, ourHeight - controlPanelHeight, worldWidth, controlPanelHeight);     
      }

   
   @Override
   @OnThread(value = Tag.FXPlatform, ignoreParent = true)
   
   protected double computePrefWidth(double height)
   {        
      
      
      return worldViewScroll.prefWidth(height) + 2 * IDEAL_WORLD_PADDING 
| Some world spacing
|
+ Math.max(shareButton.prefWidth(-1), classDiagramScroll.prefWidth(height)) + 2 * CLASS_DIAGRAM_PADDING;     
      }

   
   @Override
   @OnThread(value = Tag.FXPlatform, ignoreParent = true)
   
   protected double computePrefHeight(double width)
   {        
      
      return Math.max(shareButton.prefHeight(-1) + classDiagramScroll.prefHeight(-1) + 3 * CLASS_DIAGRAM_PADDING, 
      worldViewScroll.prefHeight(-1) + 2 * IDEAL_WORLD_PADDING + controlPanel.prefHeight(-1));     
      } 
   }