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eglfs: Improve z-order handling

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In 9ccbbeecbd we've added basic z-order handling, so main window
always stacks behind tool windows. After extensive testing we found
more basic cases to be handled:

- Modal windows go on top
- Qt::Popup goes on top of Qt::Tool

Fixes: QTBUG-105707
Pick-to: 6.4
Change-Id: I00eba330864c7abc31652226d55f66f4b7f44dc0
Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>
This commit is contained in:
Sérgio Martins 2022-09-25 22:15:52 +01:00 committed by Sergio Martins
parent b1df84b9d8
commit 732581885f
1 changed files with 19 additions and 5 deletions
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24
src/opengl/qopenglcompositor.cpp
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@ -310,14 +310,28 @@ void QOpenGLCompositor::ensureCorrectZOrder()
return true;
}
// Case #3: One of the window is a Tool, that goes to front, as done in other QPAs
// Case #3: Modality gets higher Z
if (w1->modality() != Qt::NonModal && w2->modality() == Qt::NonModal)
return false;
if (w2->modality() != Qt::NonModal && w1->modality() == Qt::NonModal)
return true;
const bool isTool1 = (w1->flags() & Qt::Tool) == Qt::Tool;
const bool isTool2 = (w2->flags() & Qt::Tool) == Qt::Tool;
if (isTool1 != isTool2) {
return !isTool1;
}
const bool isPurePopup1 = !isTool1 && (w1->flags() & Qt::Popup) == Qt::Popup;
const bool isPurePopup2 = !isTool2 && (w2->flags() & Qt::Popup) == Qt::Popup;
// Case #4: Just preserve original sorting:
// Case #4: By pure-popup we mean menus and tooltips. Qt::Tool implies Qt::Popup
// and we don't want to catch QDockWidget and other tool windows just yet
if (isPurePopup1 != isPurePopup2)
return !isPurePopup1;
// Case #5: One of the window is a Tool, that goes to front, as done in other QPAs
if (isTool1 != isTool2)
return !isTool1;
// Case #6: Just preserve original sorting:
return originalOrder.indexOf(cw1) < originalOrder.indexOf(cw2);
});
}