如何在javafx中動態創建可調整大小的形狀？

Question

我有三個問題：

1. 我想創建一個框包圍可調整大小形狀...
2. 我也想知道如何讓孩子在一個窗格中入圍。
3. 我在窗格上創建了​​多個形狀。我想改變這種形狀的一些屬性說填充..我該怎麼做？

感謝名單

Answer 1

一個例子將回答您的問題：

• ：（1）它使用綁定，連接面板尺寸與矩形大小
• 爲（2）它增加了setOnMouseClick每個在lastOne字段中存儲點擊的矩形。

• 爲（3）見setOnMouseClick()處理程序的代碼

  public class RectangleGrid extends Application { 
  
      private Rectangle lastOne; 
  
      public void start(Stage stage) throws Exception { 
      Pane root = new Pane(); 
  
      int grid_x = 7; //number of rows 
      int grid_y = 7; //number of columns 
  
      // this binding will find out which parameter is smaller: height or width 
      NumberBinding rectsAreaSize = Bindings.min(root.heightProperty(), root.widthProperty()); 
  
      for (int x = 0; x < grid_x; x++) { 
       for (int y = 0; y < grid_y; y++) { 
        Rectangle rectangle = new Rectangle(); 
        rectangle.setStroke(Color.WHITE); 
  
        rectangle.setOnMouseClicked(new EventHandler<MouseEvent>() { 
         @Override 
         public void handle(MouseEvent t) { 
          if (lastOne != null) { 
           lastOne.setFill(Color.BLACK); 
          } 
          // remembering clicks 
          lastOne = (Rectangle) t.getSource(); 
          // updating fill 
          lastOne.setFill(Color.RED); 
         } 
        }); 
  
        // here we position rects (this depends on pane size as well) 
        rectangle.xProperty().bind(rectsAreaSize.multiply(x).divide(grid_x)); 
        rectangle.yProperty().bind(rectsAreaSize.multiply(y).divide(grid_y)); 
  
        // here we bind rectangle size to pane size 
        rectangle.heightProperty().bind(rectsAreaSize.divide(grid_x)); 
        rectangle.widthProperty().bind(rectangle.heightProperty()); 
  
        root.getChildren().add(rectangle); 
       } 
      } 
  
      stage.setScene(new Scene(root, 500, 500)); 
      stage.show(); 
      } 
  
      public static void main(String[] args) { launch(); } 
  }