Simple experimental low-level UI library written in C++
94c0be051b
Previously, we were repainting each widget as repainting was needed. However, this created issues with clipping, since the widgets were not aware of their parent's clips. It also created many other issues, including performance problems and the lack of support for overlapping widgets. This commit improves repainting behavior by adopting a painting model similar to the one found in SerenityOS's LibGUI. It uses "damage rectangles", which are translated to the widget coordinate space as needed, since the position of widgets is relative to their parent's origin. When a widget needs to be repainted, a repaint event with the damage rectangle equal to the widget's current geometry translated to the window's coordinate space is dispatched to the main widget. It will recursively follow the widget tree. Widgets fully contain their children, thus widgets not contained by the damage rectangle will reject the event, ensuring repainting is only done where needed. Relayouting is done on a per-subtree basis only. This commit should pave the way for things like scrolling and overlapping widgets. |
||
|---|---|---|
| src | ||
| .gitignore | ||
| LICENSE | ||
| meson.build | ||