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UI: Scroll Bars on the Left Side of Left-Aligned Regions

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Toolbars and some other regions are aligned to the left sides of their
areas and have an (often hidden) right edge that can be dragged to
resize or hide it. If there isn't enough vertical space to show all of
its contents then you also get a scroll bar along that same edge. These
two things conflict badly and is almost impossible to use with a tablet
pen. The mouse cursor changes to indicate dragging over the scrollbar
but doesn't work. Dragging the scoll bar requires doing so to the right
of it. This PR moves the scroll bars to the left side of these left-
aligned areas. They are correctly changed to the right side if you flip
the region.

Pull Request: https://projects.blender.org/blender/blender/pulls/136218
This commit is contained in:
Harley Acheson
2025-03-24 20:45:13 +01:00
committed by Harley Acheson
parent daa417d304
commit 3e29f3eaa2
1 changed files with 10 additions and 0 deletions
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10
source/blender/editors/screen/area.cc
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@@ -3378,6 +3378,16 @@ void ED_region_panels_init(wmWindowManager *wm, ARegion *region)
{
UI_view2d_region_reinit(&region->v2d, V2D_COMMONVIEW_PANELS_UI, region->winx, region->winy);
/* Place scroll bars to the left if left-aligned, right if right-aligned. */
if (region->alignment & RGN_ALIGN_LEFT) {
region->v2d.scroll &= ~V2D_SCROLL_RIGHT;
region->v2d.scroll |= V2D_SCROLL_LEFT;
}
else if (region->alignment & RGN_ALIGN_RIGHT) {
region->v2d.scroll &= ~V2D_SCROLL_LEFT;
region->v2d.scroll |= V2D_SCROLL_RIGHT;
}
wmKeyMap *keymap = WM_keymap_ensure(
wm->defaultconf, "View2D Buttons List", SPACE_EMPTY, RGN_TYPE_WINDOW);
WM_event_add_keymap_handler(&region->runtime->handlers, keymap);