fxml - JavaFX How to set max/min window size?

Question

Does setMinSize() work on containers such as GridPane, for example? I have found that in my program GridPane ignores min. size properties while resized manually.

Here is the FXML code:

<GridPane fx:id="gp" prefHeight="134.0" prefWidth="238.0" xmlns:fx="http://javafx.com/fxml" fx:controller="javafxapplication12.SampleController">
  <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>
</GridPane>

and the controller class

public class SampleController implements Initializable {
    
    @FXML
    private GridPane gp;
    
    @Override
    public void initialize(URL url, ResourceBundle rb) {
        gp.setMaxWidth(700);
        gp.setMinSize(200, 200);
    }
}

What's wrong here? Should there be some sort of a 'window' max/min size?

Answer 1

I am going to assume that by window, you mean a Stage (which subclasses Window).

The window size can vary from the root container size for the scene. You can think of a window or stage as an independent viewport into the scene which can be sized larger or smaller than the min and max specifications of the scene root.

To set the minimum or maximum size of the Stage, set its minHeight and minWidth or maxHeight and maxWidth properties.

Answers to additional questions

Can the Stage be set to "fit whole display" size?

stage.setFullScreen(true)

But how to make the size as same as we make size by clicking on the title bar?

stage.setMaximized(true)