TableView Header problem
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Qt 5.6. All working OK except for one small thing. In the headerData function I have:
if (role == Qt::BackgroundRole) return QBrush(Qt::lightGray);but it doesn't happen. Everything else works fine. Anyone know why?
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Hi,
What do you mean by it doesn't happen ? The role is never
Qt::BackgroundRole? Or your brush has no effect ?
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I quote from QT 5.6 QHeaderView Class, section on appearance:
"Not all ItemDataRoles will have an effect on a QHeaderView. If you need to draw other roles, you can subclass QHeaderView and reimplement paintEvent(). QHeaderView respects the following item data roles: TextAlignmentRole, DisplayRole, FontRole, DecorationRole, ForegroundRole, and BackgroundRole."
So, BackgroundRole should give background colour to the headerview but mine stay white. I can change the font and I can change the foreground colour (text colour).
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What OS are you running ?
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Windows 10
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I don't have such a machine at hand. Can you test that again using the fusion style ? You have an example here
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Did that. It works! What is going on? Before I scream and pull what little hair I have left out could you offer a quick explanation. Other stuff looks different, too.
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Setting the background role will modify the QPalette used for the painting and from the QPalette documentation, styles using native theme engines may not use the palette for all drawings.
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OK. Thanks for that. Sanity has returned and I'll now go away and investigate palettes and styles and stuff.
