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