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Move the dark canvas into PaletteGraphicsView and test it directly

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The inverted painting, the rubber band replay and the changed()
receiver lived in DiagramView, which the unit tests cannot link, so the
update-flag regression was only covered through a stand-in view. They
now live in PaletteGraphicsView, a QGraphicsView subclass with no
other dependency, and DiagramView derives from it. The view tells a
subclass through paintingInverted(bool) when it renders for an
inverted display; DiagramView forwards that to the diagram. The grid
dot rule moves out of Diagram::drawBackground into
QET::Palette::gridDotColor().

tst_qetpalette now links the real class: gridDotColorSoftensInvertedDots,
paletteViewFollowsThePalette (light sheet, dark sheet at text contrast
with a red box still red and the paintingInverted calls in order, back
to light), paletteViewKeepsSceneUpdatesFlowing (three whole-scene
updates and a selection each repaint, scene set after construction),
paletteViewDrawsTheRubberBand.
This commit is contained in:
Jeff Patterson
2026-09-19 14:28:23 -05:00
parent b8c9e670c4
commit eaf15faaa3
11 changed files with 413 additions and 137 deletions
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sources/diagram.h
+2 -2
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@@ -360,8 +360,8 @@ inline void Diagram::setDisplayGrid(bool dg) {
/**
@brief Diagram::setInvertedLightness
Tell the diagram whether the view painting it will show the result
with its lightness inverted (DiagramView::paintInverted on a dark
palette). drawBackground draws a softer grid in that case. Printing
with its lightness inverted (PaletteGraphicsView on a dark palette).
drawBackground draws a softer grid in that case. Printing
and export never set this.
@param inverted
*/