How to make a transparent window with Qt Quick 2.0

Question

I've already know how to make a transparent window with Qt Quick 1.0.But I started to use Qt 5.0 and Qt Quick 2.0 recently and didn't know how to do with it.

setAttribute setWindowFlags setStyleSheet

The functions above are removed from the QtQuick2ApplicationViewer(QQuickView). So I wonder whether I can make a transparent window with Qt Quick 2 or not (is it because that it's based on OpenGL?).

score 4 · Accepted Answer · answered Dec 23 '12 at 20:55

4

Here's a Qt5 code:

QSurfaceFormat surfaceFormat;
surfaceFormat.setAlphaBufferSize(8);
viewer.setFormat(surfaceFormat);
viewer.setClearBeforeRendering(true);
viewer.setColor(QColor(Qt::transparent));

answered Dec 23 '12 at 20:55

Oleg Shparber

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It works well! Thanks. In addition,I used 'viewer.setFlags(Qt::CustomizeWindowHint);'to hide the caption bar. But when I clicked the transparent area,it still responded to the event.How to deal with it? – Hongxu Xu Dec 31 '12 at 12:33
@XuHongxu see http://stackoverflow.com/a/4930925/721710 for a Windows solution... – Oleg Shparber Jan 08 '13 at 21:20
@andrewrjones - please check again, this solution worked for me on OSX 10.9.1, Qt 5.1.1. This should be marked as the correct solution. – aaronsnoswell Mar 03 '14 at 23:27

user1095108 · Answer 2 · 2020-08-31T11:22:46.563

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~~Look here for a possible solution:~~

http://code.google.com/p/quickwidget/

But, with Qt 5.3, it is possible to use the built-in QQuickWidget class.

edited Aug 31 '20 at 11:22

answered Dec 28 '12 at 13:45

user1095108

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Sorry,I found nothing in this website. – Hongxu Xu Dec 31 '12 at 12:44
@XuHongxu: check out or view the source code! I even wrote an example. – user1095108 Jan 01 '13 at 14:11
Thanks i found it.It's useful! – Hongxu Xu Jan 03 '13 at 08:42
But when I clicked the transparent area,it still responded to the event(I can't click other window under its transparent area).How to deal with it? – Hongxu Xu Jan 03 '13 at 09:20
set a mask (i.e. call setMask()), otherwise Qt doesn't know which clicks to pass through. – user1095108 Jan 03 '13 at 11:09

How to make a transparent window with Qt Quick 2.0

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