Ios/android: information about external display

[dbzint]

Hi,

i am trying to get some information about an external display attached to an ios/android device. Everything i tried works fine if i deploy for desktop. But android-,ios device and ios simulator are always reporting only one display/screen.
Also the signal QDesktopWidget::screenCountChanged() works fine for desktop target, but not for ios/android.

For the sake of simplicity one really short example:
@#include "mainwindow.h"
#include <QApplication>
#include <QLabel>
#include <QString>

int main(int argc, char *argv[])
{
QApplication a(argc, argv);
QLabel labl;
QString str = QString("%1 screen(s) detected!").arg(a.screens().count());
labl.setText(str);
labl.show();
return a.exec();
}
@

Any help or pointers where i missed something would be greatly appreciated. Thanks.

Further Information:
I connect the iPad via lightning-digital-av-adapter+hdmi ("apple-store":http://store.apple.com/uk/product/MD826ZM/A/lightning-digital-av-adapter).
In the iOS-simulator i can attach a external display via the "hardware" menu.
For the android device its a microUSB-to-hdmi (MHL) adapter cable.

To check if the hardware is the problem i wrote a little app in Xcode and tested the iPad and iOS-simulator. Both report the external display if its attached.
I used this class "UIScreen class":https://developer.apple.com/library/ios/documentation/uikit/reference/UIScreen_Class/Reference/UIScreen.html#//apple_ref/occ/clm/UIScreen/screens

[SGaist]

Hi and welcome to devnet,

I would say your use case is currently uncommon. How do you connect an external display to your iOS/Android device ?

[dbzint]

Hey,

thanks.
I connect the iPad via lightning-digital-av-adapter+hdmi ("apple-store":http://store.apple.com/uk/product/MD826ZM/A/lightning-digital-av-adapter).
In the iOS-simulator i can attach a external display via the "hardware" menu.
For the android device its a microUSB-to-hdmi (MHL) adapter cable.

To check if the hardware is the problem i wrote a little app in Xcode and tested the iPad and iOS-simulator. Both report the external display if its attached.
I used this class "UIScreen class":https://developer.apple.com/library/ios/documentation/uikit/reference/UIScreen_Class/Reference/UIScreen.html#//apple_ref/occ/clm/UIScreen/screens

Thanks for your help.

[SGaist]

It's currently a missing feature (at least on iOS).

You should have a look at the "bug report system":http://bugreports.qt-project.org to see if it's something known, if not please open a new report.

[dbzint]

Thank you for your support SGaist.

I'll see about the bug report this evening.

[SGaist]

Don't forget to share the link to the report, so other people interested can find it more easily :)

[dbzint]

Just realized i forgot to post the link...

For future reference:
"QTBUG-39244":https://bugreports.qt-project.org/browse/QTBUG-39244