Stage.Min/MaxWidth/Height don't scale

Chris Nahr chris.nahr at
Wed Nov 18 12:24:44 UTC 2015

On Windows the minimum & maximum size properties of Stage don't scale to 
the current DPI settings, unlike all other drawing coordinates. The 
explicit size properties (setWidth/setHeight) do scale but setMinWidth, 
setMaxWidth, setMinHeight & setMaxHeight were apparently overlooked. Any 
values passed to them are interpreted as unscaled pixels.

Below I've added a short sample program to demonstrate the issue. 
Minimum size should just cover the drawn rectangle plus margins, and 
maximum size should be twice as big. But running at 200% DPI the 
*maximum* size will just cover the rectangle whereas the minimum size 
will show only a fraction of the rectangle.

(I'd file a bug report but my JIRA account didn't transition to the new 
bug tracking system, probably because I'm not an OpenJDK contributor.)

-- Chris

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.layout.StackPane;
import javafx.scene.shape.Rectangle;
import javafx.stage.Stage;

public class StageSizeTest extends Application {

     public void start(Stage primaryStage) {

         // draw scene-filling rectangle with margin
         final int margin = 10, size = 200;
         Rectangle rect = new Rectangle(margin, margin, size, size);
         StackPane root = new StackPane(rect);
         final int sceneSize = size + 2 * margin;
         Scene scene = new Scene(root, sceneSize, sceneSize);

         // add extra margin for non-client area
         final int stageSize = sceneSize + 3 * margin;
         primaryStage.setMaxWidth(2 * stageSize);
         primaryStage.setMaxHeight(2 * stageSize);

         primaryStage.setTitle("Stage Size Test");

     public static void main(String[] args) {

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