Determine the size of each Dimension of an array of 2D in TestStand

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• Determine the size of the component during execution

  I am trying to build a component Paginagion of size fixed. The number of pages which means that the size of the paging is fixed, however depending on the content may vary. Most do not specify how much is displayed on a single page.

  The idea is to use the text as input and push as much as can be displayed on the page. Factors having an influence here is the fonts and formatting.

  To determine the page which you should see that I need to understand the amount of text that can be displayed. To do this, I need to know the size of the element that contains the text (think label). The size of the label is however only determined after that is layouted. So here's what I could do:

      @Override
      public void start(Stage primaryStage) {
          Label lbl = new Label("uitroweigudfgf jkfhgklfsjghslkghs kflgskjgh");
          System.out.println(lbl.getWidth()+","+lbl.getHeight());
          lbl.widthProperty().addListener(new ChangeListener<Number>(){
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              public void changed(ObservableValue<? extends Number> ov, Number t, Number t1) {
                  System.out.println(lbl.getWidth()+","+lbl.getHeight());
              }
          });
          lbl.heightProperty().addListener(new ChangeListener<Number>(){
              @Override
              public void changed(ObservableValue<? extends Number> ov, Number t, Number t1) {
                  System.out.println(lbl.getWidth()+","+lbl.getHeight());
              }
          });
          StackPane root = new StackPane();
          root.getChildren().add(lbl);
          
          Scene scene = new Scene(root, 300, 250);
          
          primaryStage.setTitle("Hello World!");
          primaryStage.setScene(scene);
          primaryStage.show();
     }
  

  After the third change, I have the dimensions of the label. With this method, I would have to push all of the text in labels to figure out what can be displayed.

  Is there a better way to do it?

  My basic problem was with the size of the labels. Try to find a solution I had a look at LabelSkinBase which uses the Utils class in the same package. This class provides methods (although private package) to calculate the size of the text that results from:

  static Text helper = new Text();
  
  static double computeTextWidth(Font font, String text, double wrappingWidth) {
    helper.setText(text);
    helper.setFont(font);
    // Note that the wrapping width needs to be set to zero before
   // getting the text's real preferred width.
    helper.setWrappingWidth(0);
    helper.setLineSpacing(0);
    double w = Math.min(helper.prefWidth(-1), wrappingWidth);
    helper.setWrappingWidth((int)Math.ceil(w));
    return Math.ceil(helper.getLayoutBounds().getWidth());
  }
  
  static double computeTextHeight(Font font, String text, double wrappingWidth) {
    return computeTextHeight(font, text, wrappingWidth, 0);
  }
  
  static double computeTextHeight(Font font, String text, double wrappingWidth, double lineSpacing) {
    helper.setText(text);
    helper.setFont(font);
    helper.setWrappingWidth((int)wrappingWidth);
    helper.setLineSpacing((int)lineSpacing);
    return helper.getLayoutBounds().getHeight();
  }
  
  static int computeTruncationIndex(Font font, String text, double width) {
    helper.setText(text);
    helper.setFont(font);
    helper.setWrappingWidth(0);
    helper.setLineSpacing(0);
    // The -2 is a fudge to make sure the result more often matches
    // what we get from using computeTextWidth instead. It's not yet
    // clear what causes the small discrepancies.
    Bounds bounds = helper.getLayoutBounds();
    Point2D endPoint = new Point2D(width - 2, bounds.getMinY() + bounds.getHeight() / 2);
    return helper.impl_hitTestChar(endPoint).getCharIndex();
  }
  

  With that, I am able to determine the amount of text can be put into the label, without the chain of ellipsis appears.

• Determine the size of the container when using SizeUnit.PERCENT

  Hello

  How can I determine the width and height of a container, when I use the percentage of the size of the container?

  I have the following code, but this.width and this.height are both 0, causing the background sprite is not to demonstrate:

     public class HeaderContainer extends Container
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          private var _matrix:Matrix = new Matrix();
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          private var _tfmtTitle:TextFormat = new TextFormat();
  
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  Have you tried to call the initializeUI method after the container has been added to the scene? You can easily register a handler to do this.