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Fix possibly uncleared damage flag of Fl_Pack (#1172).

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Damage flag `FL_DAMAGE_ALL` is set during Fl_Pack::draw if child
is repositioned. If the child is outside the clipping area, if will not redraw
and the flag will remain set even after Fl_Pack::draw which is not allowed.
This commit is contained in:
Matthias Melcher
2024-12-16 20:30:31 +01:00
parent c083e5c5fb
commit 3293a68c1d
1 changed files with 7 additions and 1 deletions
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8
src/Fl_Pack.cxx
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@@ -110,12 +110,18 @@ void Fl_Pack::draw() {
}
if (X != o->x() || Y != o->y() || W != o->w() || H != o->h()) {
o->resize(X,Y,W,H);
// Clear all damage flags, but *set* FL_DAMAGE_ALL, even if the widget
// may be clipped by the parent and needs no redraw.
o->clear_damage(FL_DAMAGE_ALL);
}
if (d&FL_DAMAGE_ALL) {
draw_child(*o);
draw_outside_label(*o);
} else update_child(*o);
} else {
update_child(*o);
}
// Make sure that all damage flags are cleared.
o->clear_damage();
// child's draw() can change it's size, so use new size:
current_position += (horizontal() ? o->w() : o->h());
if (current_position > maximum_position)