Cascades Development

[javayoung]

Is there a way to get the width and height of the current screen in QML?

Because I have to use the absolute layout and I also want to let the position of controller could fit with different dimension of screens, I plan to calculate the position based on the screen size to locate the controller to a relative position. In BB7 development, it is availabe to do this way. But I have not found how to realize it in BB10 QML.

Thank you someone can figure it out.

[BGmot · Accepted solution]

This might help

https://developer.blackberry.com/cascades/reference/bb__device__displayinfo.html

[Zmey · Accepted solution]

Another option is to attach LayoutUpdateHandler to a container and reposition controls on updates. This way screen rotation won't break the layout.

https://developer.blackberry.com/cascades/reference/bb__cascades__layoutupdatehandler.html

[javayoung]

Both your answers are so great. I got it. Thank you.

[javayoung]

LayoutUpdateHandler is very useful. I can finally realize the complicated UI by that. If this methodology could be mentioned in the official documentation, i think that it will help the developers a lot.

[igosoft]

very simple example .  

import bb.cascades 1.0

Page {
   Container {
       id: rootContainer
       attachedObjects: [
           LayoutUpdateHandler {
               id: layoutHandler
           }
       ]
  Label {
      text: layoutHandler.layoutFrame.width
    }
  }
}