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Everything Else => Zaurus - Everything Development => Distros, Development, and Model Specific Forums => Archived Forums => Qt/Qtopia => Topic started by: vanstrien on September 19, 2004, 04:37:29 am

Title: Detecting screen resolution
Post by: vanstrien on September 19, 2004, 04:37:29 am

I'm writing a qtopia app which I would like to have a different graphical template depending on if it is running on my 5500 or 860.  Since I'm using images I will need to scale the images up by a factor if they are on the 860.

Anyone know the options for detecting the resolution (so I can then set a scale factor) from qpeapplication?  

I have looked at doing it from my main qwidget (with width() and height()) but I tend to not get the right info at the beginning of the app anyway.

I would also like to use a different layout if it is landscape versus portrait.  For this I will probably just compare the width and height.  If anyone has other suggestions please let me know.

Title: Detecting screen resolution
Post by: zautrix on September 19, 2004, 05:54:28 am

With

QApplication::desktop()->width()

QApplication::desktop()->height()

you will get, what you need.

z.

Title: Detecting screen resolution
Post by: vanstrien on September 19, 2004, 02:20:13 pm

Thanks.  It works a treat.  I had looked around for a while but hadn't come across those...

Title: Detecting screen resolution
Post by: vanstrien on September 26, 2004, 06:15:36 am

Is there an event that is emitted when the screen is rotated?  

The only way I have been able to find to deal with rotation is to remember the original rotation, and if the rotation changes then scale everything to the different perspective.

ie.
  original_rotation = AppLnk::rotation();
...
void draw() {
 if (original_rotation != AppLnk::rotation()) scale();
 ...
}

Title: Detecting screen resolution
Post by: Mickeyl on September 26, 2004, 10:40:43 am

The Opie launcher sends setRotation via QCOP to QPE/System. See
Opie-Camera (http://cvs.handhelds.org/cgi-bin/viewcvs.cgi/opie/noncore/multimedia/camera/gui/mainwindow.cpp?annotate=1.7) for how to receive rotation notifications and act upon them.

Note that I'm not sure if Qtopia does the same.

Title: Detecting screen resolution
Post by: ashikase on September 26, 2004, 11:56:30 am

When the screen is rotated, it causes a QResizeEvent to be emitted. In your main widget (or any widget), you can override the 'resizeEvent' function to handle this.

For example:

Code: [Select]

void myApp::resizeEvent( QResizeEvent * ev )
{
   // change layout according to screen orientation
   if( ev->size().width() > ev->size().height() ) {
      // landscape mode
   } else {
      // portrait mode
   }

   QWidget::resizeEvent(ev);
}
- ashikase
  anpachi, gifu, japan