If you recently typed apt-get update && apt-get dist-upgrade in your Scratchbox based Maemo 5 SDK, you might have noticed a large amount of packages flooding in – yes, PR 1.2 is near. Maemo.org is already full of PR 1.2 blogs, including a visual overview of the new features and the PR 1.2 Changelog.
This means that the time of the libqt4-maemo5-* packages has come to an end, please use and test the libqt4-* packages (4.6.2~git20100310-0maemo1+0m5), which now contain Qt 4.6.2+x in /usr/lib. To uninstall the old preview packages, just run apt-get remove libqt4-maemo5-\*.
Wait – Qt 4.6.2+x? Well, as with every Linux distribution, some smaller fixlets and features were backported. I’d like to highlight a few of them.
Up until now, kinetic scrolling was limited to 20 fps. This is a good default, since 20 fps look smooth, don’t drain too much battery and leave some CPU for background processes/threads (isn’t it nice to have multi-tasking?). However, for demo purposes, you might want to have 60 fps for that really, really smooth look, so we introduced the QAbstractKineticScroller::scrollsPerSecond property. Unfortunately, our camera cannot grab 60 fps, so no youtube video today 
The second interesting feature is QAbstractKineticScroller::axisLockThreshold. Imagine that a user scrolls downwards in a QScrollArea. Now, unless he’s an android, he won’t manage to scroll down in a perfect line, usually it’s something like 100 pixels downwards and 5 pixels to the left. The axisLockThreshold property allows to lock the scrolling to the nearest X or Y axis. In our example, the 5 pixels to the left are ignored, and the view just moves 100 pixels down.
Finally, QAbstractKineticScroller::OvershootPolicy allows to set the overshooting behavior when scrolling. The default is to just do overshooting when a view is able to scroll in a particular direction. In addition to the default behavior, overshooting can now be completely disabled, or always forced on.
A note for everyone building Qt from sources – after you upgrade your SDK to PR 1.2, you should use the *-pr1.2 branches (e.g. 4.6-fremantle-pr1.2) to get the latest input method fixes.
Happy Easter Hacking
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5 comments
Excellent news! Now however where can I find the replacement for libqt4-maemo5-homescreen-loader?
@toninikkanen: Coming soon to the extras repository (ETA is next week)
Hello,
1) Please let me know what and where is “Extras repository”
2) Would the PR1.2 be sent OTA?
3) Would this address the unusual battery discharge issue?
Thank you,
S
Update: qt4-homescreen-loader is now promoted to extras-testing and should appear in extras soon.
Shub: The repositories are documented on the maemo wiki, see http://wiki.maemo.org/Extras-testing
We can’t make any comments about PR 1.2, please try the Maemo community forums, not the Qt ones.
Harald: Excellent! Looking into it now.
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