Stage must comply with the minimum dimensions of its content

Hello
I wonder if there were a standardized approach to make the scene inherits its minimum size of its content.
I tried to link the mimimumWidthProperty to step to equivalent StackPane, but without success.

The only way I found was to "force" the size by explicitly calling stage.setMinWidth (), but this really dynamic.
For more information, the default size works very well and is well managed by the scene.
Thank you.

If the following example, the scene does not meet the minimum size set on the StackPane:
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;

public class TestMinSize extends Application {
    
    @Override
    public void start(Stage primaryStage) {
        Button btn = new Button();
        btn.setText("Say 'Hello World'");

        StackPane root = new StackPane();
        
        // set minimum size
        root.setMinWidth(200);
        root.setMinHeight(200);
        
        root.getChildren().add(btn);
        
        Scene scene = new Scene(root, 300, 250);
        
        primaryStage.setTitle("Hello World!");
        primaryStage.setScene(scene);
        primaryStage.show();
    }
}

The only thing that comes to mind is binding properties to subtract the size of the stage decoration.
But this would not take into account if a child node of the node of your root has a minWidth/height of the root.
And generally it works if the root has a minSizeProperty, but Scene.getRoot () is a Parent.

primaryStage.minHeightProperty().bind(primaryStage.heightProperty().subtract(scene.heightProperty()).add(root.minHeightProperty()));
primaryStage.minWidthProperty().bind(primaryStage.widthProperty().subtract(scene.widthProperty()).add(root.minWidthProperty()));

Or a little broader:

public static void respectMinimumSize(Stage stage) {
     Scene scene = stage.getScene();
     if (scene.getRoot() instanceof Region) {
          Region root = (Region) scene.getRoot();
          stage.minHeightProperty().bind(Bindings.max(0, stage.heightProperty().subtract(scene.heightProperty()).add(root.minHeightProperty())));
          stage.minWidthProperty().bind(Bindings.max(0, stage.widthProperty().subtract(scene.widthProperty()).add(root.minWidthProperty())));
     }
}

Published by: Fatima March 10, 2013 17:56

Published by: Fatima March 10, 2013 17:57

Tags: Java

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