I agree with what you are saying, but I am pointing out that the LZX event should be based on the display dimensions, not a device sensor. That way, even in a browser, I can have the benefit of landscape or portrait orientations.
Another way of looking at it is that a mobile device kernel should virtualize changing the orientation of the device as a change in the screen dimensions (just as if I had resized a browser window). On Jul 12, 2010, at 10:26, Quirino Zagarese <[email protected]> wrote: > I guess the point is runtime rotation of the device. > If I rotate my device I would like to have some kind of event or callback in > order to > reorganize the UI. Of course I can benefit of constraints, but I need to know > first the device > has actually been rotated. If I had to build an Android LZX app, > I would put a main view in the canvas that rotates accordingly to underlying > device rotation > events. Inside it I would use constraints to automatically re-dispose > components. > For this purpose, Laszlo is simply great! > > Quirino > > > 2010/7/12 P T Withington <[email protected]> > I think this is a place where OpenLaszlo could potentially really shine, > through the use of constraints. You don't _really_ need to know about screen > "orientation" since you should be able to deduce it from the canvas dimesions: > > function screenOrientation () { > return canvas.width > canvas.height ? 'landscape' : 'portrait'; > } > > A careful OL app will use constraints to optimize itself to the canvas > dimensions and thus work in resizable browser windows, on platforms with > various screen dimensions, etc. If the app wants to present different > layouts based on landscape or portrait orientation, why should it base that > on some hardware device sensor? I should be able to resize my browser window > and get the same layout. > > On 2010-07-12, at 08:19, Raju Bitter wrote: > > > After my first weeks of testing OpenLaszlo+PhoneGap on Android I think > > one of the first improvement the LFC needs would be support for screen > > orientation. Probably > > > > a) a canvas attribute storing the orientation value > > For the iOS possible values are: > > 1) UIInterfaceOrientationPortrait > > 2) UIInterfaceOrientationPortraitUpsideDown > > 4) UIInterfaceOrientationLandscapeLeft > > 5) UIInterfaceOrientationLandscapeRight > > > > Android default modes are portrait and landscape. > > > > b) a canvas event in case the screen orientation changes > > > > http://jira.openlaszlo.org/jira/browse/LPP-9048 > > > > For Android/PhoneGap we'd need to extend the DroidGap class to send an > > event into JavaScript/canvas in case of layout/orientation change, it > > doesn't seem to be supported through JavaScript, at least for 2.1. > > > _______________________________________________ > Mobile mailing list > [email protected] > http://www.openlaszlo.org/mailman/listinfo/mobile > > > > -- > Quirino Zagarese > > PhD Student - Engineering Department - Università degli Studi del Sannio > > Italian OpenLaszlo Community - www.laszloitalia.org > > EU4RIA: Laszlo+Java, easily - eu4ria.googlecode.com
