DrawTextItemDevice::metric: Invalid metric command on OS X

pi31415926

Hello,

I get a lot of messages "DrawTextItemDevice::metric: Invalid metric command" when outputting static text.
I'm simply doing it like this (the painter was created in a QWidget with "QPainter painter(this);"):
QStaticText text(string);
painter.drawStaticText(pos.x, pos.y, text);

The call stack is the following:
(anonymous namespace)::DrawTextItemDevice::metric(QPaintDevice::PaintDeviceMetric) const
QPainterPrivate::effectiveDevicePixelRatio() const
QPainterPrivate::hidpiScaleTransform() const
QPainterPrivate::updateMatrix()
QPainter::setWorldTransform(QTransform const&, bool)
QPainter::setTransform(QTransform const&, bool)
QStaticTextPrivate::init()
QPainter::drawStaticText(QPointF const&, QStaticText const&)
QPainter::drawStaticText(int, int, QStaticText const&)
HexEditorCoreQT::drawText(_DOUBLE_POINT&, UNICODE_BUFFER*)

To me it seems that I can't fix this myself since in QPainterPrivate::effectiveDevicePixelRatio() there is a Mac-specific call to device->metric(QPaintDevice::PdmDevicePixelRatio)

Does anybody have any suggestions? Thanks for any help!

SGaist

Hi and welcome to devnet,

What combination of OS X/Qt are you using ?

Did you check the "bug report system":http://bugreports.qt-project.org to see it if was something known ?

pi31415926

I'm using OS X 10.8.5 and Qt 5.2.0

Not only the Qt bug report system but also Google doesn't return this as a known issue.

Btw: outputting a string with painter.drawText(x, y, string) outputs no message.

SGaist

Can you provide a minimal compilable example that shows the behavior ?

pi31415926

Fortunately the issue is reproducible with a very simple example:
https://dl.dropboxusercontent.com/u/46505886/StaticTextError.zip

The (unwanted) warning message output is located at line 570 of https://qt.gitorious.org/qt/qt/source/cf179ef3e38516555ce60517aa8e085b33e75744:src/gui/text/qstatictext.cpp

SGaist

Confirmed, can you open a bug report "here":http://bugreports.qt-project.org with your example ?

Don't forget to post the link here

pi31415926

The issue can be tracked on on https://bugreports.qt-project.org/browse/QTBUG-36419