> Am 22.01.2016 um 20:44 schrieb Edward Sutton <edward.sut...@subsite.com>:
>
>
>> On Jan 22, 2016, at 1:30 PM, Jason H <jh...@gmx.com> wrote:
>>
>> >Look for something called DevicePixelRatio... Also QML Screen attached
>> >property/element. It might be a shortcoming in Qt, but you should be able
>> >to work around it.
>
> Thanks Jason. I have same issue on iOS as well.
>
> I will Google Qt examples for DevicePixelRatio. I am puzzled why Qt scaling
> does not occur automatically?
>
> Maybe it does automatically scale for QML. I am using QWidgets.
Just a shot into the blue: at least on OS X have to be made "Retina ready" by
setting some property in the Info.plist file, something like
"NSHighResolutionCapable" (true). Plus the "principal class" (?) has to be set
there as well, as a precondition.
Off course /not/ setting those values should not result in "4x magnified
images" on a retina screen. Sounds like Qt thinks it needs to draw the @2x
image resources, whereas OS X treats the application as "non-retina capable".
What about plain text (in widgets)? Does it look "retina-like"? Or pixelated
(which would indicate that the OS treats the app as "non-retina capable") on
the retina screen?
Maybe just some hope: my own QWidget/QGraphicsView based app looks fine,
including QGraphicItems in the QGraphicView. Latest Qt 5.5.1 stock binary, El
Capitan.
Even moving the app between retina/non-retina screens works as expected: the Qt
app redraws itself with the appropriate resolution as soon as more than 50% of
the window overlap with the "other" screen.
Cheers,
Oliver
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