lexus2k / lcdgfx / 25076006873

55%

Build Type

push

github

Committed by lexus2k

Commit Message

fix(gui): eliminate flicker and scroll artifacts in menu/checkbox/slider/spinbox

Menu / CheckboxMenu:
- show() now uses a smart incremental redraw: full draw on first call
  or when the visible window scrolls, otherwise only the affected
  rows (old + new selection, plus any items whose checkbox bit
  changed) are repainted.
- Replaced the scroll-arrow band with a slim right-edge scrollbar
  (page-aligned, safe on 1bpp displays).
- drawMenuItem clears its own row interior before drawing, so old
  longer labels don't bleed through after scrolling.
- CheckboxMenu: the box itself is no longer inverted on the
  highlighted row; only the text strip flips colors via
  invertColors().
- CheckboxMenu: toggling the selected item now redraws it
  immediately without requiring an up/down move.
- Added invalidate() to force a full redraw; setRect() invalidates.

Slider / Spinbox:
- show() clears the widget's rectangle interior before redrawing,
  so callers no longer need display.clear() between updates.
- Demos updated accordingly: slider_demo uses a padded "Value: %3d "
  print and drops display.clear(); spinbox_demo drops display.clear()
  from up/down handlers.

All 470 unit tests still pass.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

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1 existing line in 1 file now uncovered.

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