pub const WINDOW_FRAME_RESIZE_THICKNESS: f32 = 6.0;Expand description
Logical-pixel thickness of each resize strip, and the frame’s default.
The same 6 dp gutter the Splitter and the dock resize handle use. It is
fixed at every density: the strip is a hit-test-only overlay drawn over
the window’s own edge, so widening it would eat into the content rather
than into empty space. A coarse pointer reaches it through
Widget::hit_outset (24 dp, 44 at Touch) over an unchanged 6 dp visual —
see engineering/docs/density-inventory.md and the touch design’s Constants table.