package bluej.debugmgr.inspector;

import bluej.Config;
import bluej.utility.javafx.JavaFXUtil;
import javafx.beans.binding.Bindings;
import javafx.beans.property.ReadOnlyObjectWrapper;
import javafx.beans.property.ReadOnlyStringWrapper;
import javafx.beans.property.SimpleBooleanProperty;
import javafx.geometry.Insets;
import javafx.scene.control.Label;
import javafx.scene.control.SelectionMode;
import javafx.scene.control.TableCell;
import javafx.scene.control.TableView;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.layout.HBox;
import javafx.scene.layout.Pane;
import javafx.scene.text.Text;
import threadchecker.OnThread;
import threadchecker.Tag;

import java.util.List;

import static bluej.debugger.DebuggerObject.OBJECT_REFERENCE;




| A graphical representation of a list of fields from a class or object.
|
| @author Poul Henriksen <polle@mip.sdu.dk>
|
@OnThread(Tag.FXPlatform)
public class FieldList extends TableView<FieldInfo>{    
   final static private Image objectrefIcon = Config.getImageAsFXImage("image.inspector.objectref");
   
   private static class StringOrRef
{              
private String string; 

       
      public StringOrRef(String string)
       {
         this.string = OBJECT_REFERENCE.equals(string) ? null : string;         
         }     
      }

   
   


| Creates a new fieldlist with no data.
|
public FieldList()
   {
      this.getSelectionModel().setCellSelectionEnabled(false);
      this.getSelectionModel().setSelectionMode(SelectionMode.SINGLE);
      this.setColumnResizePolicy(CONSTRAINED_RESIZE_POLICY);
       
      int rowHeight = 30;
      this.setFixedCellSize(rowHeight);
      prefHeightProperty().bind(Bindings.min(400.0, fixedCellSizeProperty().multiply(Bindings.size(getItems())).add(JavaFXUtil.ofD(paddingProperty(), Insets::getTop)).add(JavaFXUtil.ofD(paddingProperty(), Insets::getBottom))));
      setMinHeight(3.5 * (double)rowHeight);
      JavaFXUtil.addStyleClass(this, "field-list");

       
      javafx.scene.control.TableColumn<FieldInfo, String> description = new javafx.scene.control.TableColumn<FieldInfo, String>();
      JavaFXUtil.addStyleClass(description, "inspector-field-description");
       
      description.setCellValueFactory(v -> new ReadOnlyStringWrapper(v.getValue().getDescription()));
       
      javafx.scene.control.TableColumn<FieldInfo, StringOrRef> value = new javafx.scene.control.TableColumn<>();
      JavaFXUtil.addStyleClass(value, "inspector-field-value");
       
      value.setCellValueFactory(v -> new ReadOnlyObjectWrapper(new StringOrRef(v.getValue().getValue())));
       
      value.setCellFactory(col -> new ValueCell());
      getColumns().setAll(description, value);

       
      
      
      
      JavaFXUtil.addChangeListener(widthProperty(), s -> {
           
      double descriptionWidth =0;
           
      for (int i=0; i < getItems().size();i++) 
           {                
         Text textDescription = new Text(description.getCellData(i));
         if (descriptionWidth < textDescription.getLayoutBounds().getWidth()) 
               {
            descriptionWidth = textDescription.getLayoutBounds().getWidth();                 
            }             
         }
      description.setMinWidth(descriptionWidth * 1.5);
      description.setMaxWidth(descriptionWidth * 2);

           
      double valueWidth =0;
           
      for (int i=0; i< getItems().size();i++) 
           {
         if (value.getText() != null)
               {                    
            Text textValue = new Text(value.getCellData(i).string);
            if (valueWidth < textValue.getLayoutBounds().getWidth()) 
                   {
               valueWidth = textValue.getLayoutBounds().getWidth();                     
               }                 
            }             
         }
      value.setMinWidth(valueWidth);         
      });
   
   JavaFXUtil.addChangeListener(widthProperty(), ignore -> {
           
   
   Pane header = (Pane) lookup("TableHeaderRow");
   if (header.isVisible()){
      header.setMaxHeight(0);
      header.setMinHeight(0);
      header.setPrefHeight(0);
      header.setVisible(false);             
      }         
   });
}

   



| A list of fields that should be shown in this list.
|
| @param listData
|            The list of fields
|
public void setData(List<FieldInfo> listData)
   {
   getItems().setAll(listData);             
   }

   



| A TableCell which either shows a label or a graphic.  They are wrapped
| in a container to allow a border with padding to be applied.
|
private static class ValueCell extends TableCell<FieldInfo, StringOrRef>
   {        
   private HBox container = new HBox(); 
   private Label label = new Label();
       
   private ImageView objRefPic;
       
   private SimpleBooleanProperty showingLabel = new SimpleBooleanProperty(true);
       
   private SimpleBooleanProperty occupied = new SimpleBooleanProperty(true);

       
   public ValueCell()
       {            
      objRefPic = new ImageView(objectrefIcon);
      container.getChildren().addAll(label, objRefPic);
      JavaFXUtil.addStyleClass(container, "inspector-field-value-wrapper");
      JavaFXUtil.addStyleClass(label, "inspector-field-value-label");
      objRefPic.managedProperty().bind(showingLabel.not());
      objRefPic.visibleProperty().bind(showingLabel.not());
      label.managedProperty().bind(showingLabel);
      label.visibleProperty().bind(showingLabel);
      container.visibleProperty().bind(occupied);
      setText("");
      setGraphic(container);         
      }

       
   @Override
   @OnThread(value = Tag.FXPlatform, ignoreParent = true)
       
   protected void updateItem(StringOrRef v, boolean empty)
       {
      super.updateItem(v, empty);
      occupied.set(!empty);
      if (v != null && v.string == null)
           {
         showingLabel.set(false);             
         }
           

      else
           {
         label.setText(v == null || empty ? "" : v.string);
         showingLabel.set(true);             
         }         
      }     
   } 
}