移動未裝飾階段的JavaFX與JXML和場景生成器

Question

我試圖捕捉X和JavaFX中一個未經修飾窗格的Y座標。該項目使用javafx，JXML和Scene Builder創建。現在還有其他的鏈接提示了答案，但我無法實現它。要麼我得到構建錯誤異常，要麼拿NaN作爲座標。使用以下代碼實現可移動窗格功能所需的最小修改是什麼？

這裏是MainApp.java（跳過進口，因爲他們是通過NetBeans的處理得非常好）

public class MainApp extends Application { 

@Override 
public void start(Stage stage) throws Exception { 
    GridPane MainPane = FXMLLoader.load(getClass().getResource("/fxml/Scene.fxml")); 

    Scene scene = new Scene(MainPane, Color.TRANSPARENT); 
    scene.getStylesheets().add("/styles/Styles.css"); 
    stage.initStyle(StageStyle.TRANSPARENT); 

    stage.setScene(scene); 
    stage.show(); 

} 

public static void main(String[] args) { 
    launch(args); 
} 

} 

FXMLController.java

代碼

public class FXMLController extends GridPane { 

public void rootNodeClick(MouseEvent mouseEvent) { 
System.out.println("click"); 
} 

public void rootNodeDrag(MouseEvent mouseEvent) { 
System.out.println("drag"); 
} 
} 

FXML

<?xml version="1.0" encoding="UTF-8"?> 


<GridPane fx:id="MainPane" alignment="CENTER" focusTraversable="true" maxHeight="550.0" maxWidth="600.0" minHeight="550.0" minWidth="600.0" nodeOrientation="LEFT_TO_RIGHT" onMouseClicked="#rootNodeClick" onMouseDragged="#rootNodeDrag" prefHeight="550.0" prefWidth="600.0" style="-fx-background-color: #ecf0f1; -fx-background-radius: 3;" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="FXMLController"> 
<columnConstraints> 
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" /> 
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" /> 
</columnConstraints> 
<rowConstraints> 
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" /> 
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" /> 
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" /> 
</rowConstraints> 
<effect> 
<InnerShadow blurType="GAUSSIAN" color="#ffffff44" height="10.0" radius="4.5" width="10.0" /> 
</effect> 
</GridPane> 

Answer 1

東西像這樣應該可以做到。當按下鼠標時，我們捕捉X和Y並在拖動結束時設置差異。

final Delta dragDelta = new Delta(); 
    MainPane.setOnMousePressed(new EventHandler<MouseEvent>() { 
     @Override 
     public void handle(MouseEvent me) { 
      if (me.getButton() == MouseButton.PRIMARY) { 
       dragDelta.x = me.getSceneX(); 
       dragDelta.y = me.getSceneY(); 
      } 
     } 
    }); 

    MainPane.setOnMouseDragged(new EventHandler<MouseEvent>() { 
     @Override 
     public void handle(MouseEvent me) { 
      if (me.getButton() == MouseButton.PRIMARY) { 
       scene.getWindow().setX(me.getScreenX() - dragDelta.x); 
       scene.setY(me.getScreenY() - dragDelta.y); 
      } 
     } 
    }); 

這裏是三角洲

public class Delta { 
    public double x; 
    public double y; 
} 

原來的答案＃2發現，我用它很久以前，但我不能再次找到它，對於原來的答案