Fix mouse position with screen transform #77923
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RandomShaper
reviewed
Jun 8, 2023
scene/main/viewport.cpp
Outdated
| @@ -1351,7 +1351,12 @@ Ref<InputEvent> Viewport::_make_input_local(const Ref<InputEvent> &ev) { | |||
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| Vector2 Viewport::get_mouse_position() const { | |||
| ERR_READ_THREAD_GUARD_V(Vector2()); | |||
| if (DisplayServer::get_singleton()->has_feature(DisplayServer::FEATURE_MOUSE)) { | |||
| if (!is_inside_tree() || (Object::cast_to<SubViewport>(this) && !Object::cast_to<SubViewportContainer>(get_parent()))) { | |||
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I'm wondering if this condition can be rewritten based on some already existing is-attached-to-screen functionality or at least should be put in a new virtual bool is_attached_to_screen(), or the like.
Maybe not. It's that checking the type of this seems a bit odd.
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I am not aware of any existing functionality, that covers this.
is_attached_to_screen could be something like:
bool SubViewport::is_attached_to_screen() const {
return Object::cast_to<SubViewportContainer>(get_parent()) && get_parent()->get_viewport() && get_parent()->get_viewport()->is_attached_to_screen();
}
bool Window::is_attached_to_screen() const {
if (get_embedder()) {
return get_embedder()->is_attached_to_screen();
}
return is_inside_tree();
}Alternatively we could introduce a virtual function:
bool Viewport::is_window() const {
return true;
}
bool SubViewport::is_window() const {
return false;
}And replace Object::cast_to<SubViewport>(this) by !_is_window().
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I have updated the PR and introduced a is_directly_attached_to_screen method.
When a Viewport is not directly attached to the screen, the function `Viewport::get_mouse_position` can't rely on `get_screen_transform`, because that function is ambiguous in these situations. In these cases it is necessary to use the mouse position from the most recent mouse IputEvent.
Sauermann
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RandomShaper
approved these changes
Jun 9, 2023
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Thanks! |
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When a Viewport is not in the scene tree or not a child of a
SubViewportContainer, the functionViewport::get_mouse_positioncan't rely onget_screen_transform, because that function is ambiguous in these situations.In these cases it is necessary to use the mouse position from the most recent mouse InputEvent.
resolve #74868