Withdrawn: 8264591: HBox/VBox child widths pixel-snap to wrong value

[Michael Strauß]

On Mon, 29 Mar 2021 19:57:17 GMT, Michael Strauß <mstrauss at openjdk.org> wrote:

> The children of HBox/VBox don't always pixel-snap to the same value as the container itself when a render scale other than 1 is used. This can lead to a visual glitch where the content bounds don't line up with the container bounds. In this case, the container will extend beyond its content, or vice versa.
> 
> The following program shows the problem for HBox:
> 
> Region r1 = new Region();
> Region r2 = new Region();
> Region r3 = new Region();
> Region r4 = new Region();
> Region r5 = new Region();
> Region r6 = new Region();
> r1.setBackground(new Background(new BackgroundFill(Color.GREY, null, null)));
> r2.setBackground(new Background(new BackgroundFill(Color.DARKGRAY, null, null)));
> r3.setBackground(new Background(new BackgroundFill(Color.BLACK, null, null)));
> r4.setBackground(new Background(new BackgroundFill(Color.GREY, null, null)));
> r5.setBackground(new Background(new BackgroundFill(Color.DARKGRAY, null, null)));
> r6.setBackground(new Background(new BackgroundFill(Color.BLACK, null, null)));
> r1.setPrefWidth(25.3);
> r2.setPrefWidth(25.3);
> r3.setPrefWidth(25.4);
> r4.setPrefWidth(25.3);
> r5.setPrefWidth(25.3);
> r6.setPrefWidth(25.4);
> r1.setMaxHeight(30);
> r2.setMaxHeight(30);
> r3.setMaxHeight(30);
> r4.setMaxHeight(30);
> r5.setMaxHeight(30);
> r6.setMaxHeight(30);
> HBox hbox1 = new HBox(r1, r2, r3, r4, r5, r6);
> hbox1.setBackground(new Background(new BackgroundFill(Color.RED, null, null)));
> hbox1.setPrefHeight(40);
> 
> r1 = new Region();
> r2 = new Region();
> r3 = new Region();
> r4 = new Region();
> r5 = new Region();
> r6 = new Region();
> r1.setBackground(new Background(new BackgroundFill(Color.GREY, null, null)));
> r2.setBackground(new Background(new BackgroundFill(Color.DARKGRAY, null, null)));
> r3.setBackground(new Background(new BackgroundFill(Color.BLACK, null, null)));
> r4.setBackground(new Background(new BackgroundFill(Color.GREY, null, null)));
> r5.setBackground(new Background(new BackgroundFill(Color.DARKGRAY, null, null)));
> r6.setBackground(new Background(new BackgroundFill(Color.BLACK, null, null)));
> r1.setPrefWidth(25.3);
> r2.setPrefWidth(25.3);
> r3.setPrefWidth(25.4);
> r4.setPrefWidth(25.3);
> r5.setPrefWidth(25.3);
> r6.setPrefWidth(25.4);
> r1.setMaxHeight(30);
> r2.setMaxHeight(30);
> r3.setMaxHeight(30);
> r4.setMaxHeight(30);
> r5.setMaxHeight(30);
> r6.setMaxHeight(30);
> HBox hbox2 = new HBox(r1, r2, r3, r4, r5, r6);
> hbox2.setBackground(new Background(new BackgroundFill(Color.RED, null, null)));
> hbox2.setPrefHeight(40);
> hbox2.setPrefWidth(152);
> 
> VBox root = new VBox(new HBox(hbox1), new HBox(hbox2));...

This pull request has been closed without being integrated.

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PR: https://git.openjdk.org/jfx/pull/445