Native Development

[adampigg]

Hi

Im using the following code, which i _think_ should stop the screen from idling.  Im using a DevAlphaA for testing.

viewer is a QmlApplicationViewer, and is the top level widget.  The property appears to get set Ok as i confirm and print it out in the qDebug, yet the screen still sleeps.

The hide() is in there to see if hiding and showing helped, but it didnt.

Any help appreciated!

qDebug() << "On a blackberry!";

viewer->setOrientation(QmlApplicationViewer:creenOrientationLockPortrait);
viewer->setMainQmlFile(QLatin1String("app/native/qml/pgz-farmbreakout/main-blackberry.qml"));
viewer->setResizeMode(QDeclarativeView:izeRootObjectToView);
viewer->setGeometry(0, 0, 768, 1280);

int idle_mode = SCREEN_IDLE_MODE_KEEP_AWAKE;
int ret = 0;

WId winId = viewer->winId();
ret = screen_set_window_property_iv(screen_window_t(winId), SCREEN_PROPERTY_IDLE_MODE, &idle_mode);

viewer->hide();

screen_get_window_property_iv(screen_window_t(winId), SCREEN_PROPERTY_IDLE_MODE, &idle_mode);

qDebug() << "Idle Mode:" << idle_mode << SCREEN_IDLE_MODE_KEEP_AWAKE << ret << winId;

viewer->showFullScreen();

[torpesco]

I briefly had something like that before switching to the Cascades method. A friend with a device confirmed it worked for me...

Unfortunately, it seems that I didn't actually commit that code to my repository before replacing it.

I have a feeling, though, that I used screen_set_display_property_iv(). I'm not positive, though. I know I tried controlling the screen brightness with that, but it did not work at all...

[BGmot]

In Native app I would call screen_post_window() to make sure this property change 'applied' as it is of 'Delayed execution' type.

Not sure what to do with QML. Doesn't QML have some similar property? i.e. do you have to access underlying native Window to set this up?

[BGmot]

Here you go - did you see screenIdleMode property of bb::cascades::Window ?

[adampigg]

Im not sure i can call screen_post_window becuase i dont know the buffer argument. However, i did try hiding and showing the window to force a refresh as suggested on IRC but that didnt work either

[adampigg]

Im not using cascades, im using plain Qt + QML. I can write some native c++ if needed, but not cascades.

[smcveigh]

try flushing the screen context after you update the window properties.

you can retrieve the context from the window handle.

see :nWindowAttached() in this file:

https://github.com/blackberry/Cascades-Community-Samples/blob/master/HelloCamera/src/hellocameraapp....

[adampigg]

Thanks for the suggestion. the code compiles but has no effect....its driving me nuts!

[adampigg]

Finally fixed it!

Thanks for all the help. The code i was using turned out to be right, but i wasnt setting the property on the correct window. For performance reasons, i set the viewport of the viewer to a QGLWidget, and when i used the handle of GLWidget it works correctly.

Thanks again for the help

[torpesco]

Gotta love those subtleties... Glad you figured it out!