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Votes

0

Found in

2019.2.0a1

2019.2.0b6

2019.3.0a1

Issue ID

1164455

Regression

Yes

[UIElements]Mouse events cannot be taken out of VisualElement.layout when using transform

UI Toolkit

-

How to reproduce:
1. Open user-supplied project
2. Open "BugReport" from the Menu tab > TransformBoundWindow
3. Move the mouse inside layout and try to go on the green layout

Expected result: Mouse moves all around the "Bounding Box"
Actual result: Mouse events cannot be taken outside the brown square (VisualElement.layout)

Reproducible with: 2019.2.0b6, 2019.3.0a6
Not reproducable with: 2017.4.29f1, 2018.4.2f1, 2019.1.7f1

  1. Resolution Note (2019.3.X):

    The problem reported happens because of a picking optimization which limits picking to the bounding box of the visual element (the union of the element enclosing rect and all of its children bounding box).

    It worked in previous versions because the user is overriding ContainsPoint() so that it returns true outside the element enclosing rect. However, it now never gets called because we use bounding boxes as a first test for picking. This test is not overridable by users.

    Since the user wants to draw and pick outside the MyIMGUIContainer element, I suggest this element be made as large as the enclosing window.

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