[MeeGo-touch-dev] How to customize animations.

[Tomas Junnonen]

On 08/06/2010 04:29 AM, ext ÖÇËÉ Åá wrote:
> 	
> Hi, I have analysis the MTF for 2 weeks.
> In document, it says theme & styling include with custom animations.
> But, I found that animations like page switch animation, screen
> orientation change animation are still hard code in several classes.
> I want to join with animation api development. But, first of all, I need
> the intent of the design. What design want to ?
> Thanks.

The animations are currently stylable (i.e. you can configure all the 
animation parameters) but not themable (you can't replace a framework 
internal animation with a completely different one).

This is merely the result of work prioritization so far, it is not a 
huge job to make the animations themable. We've spent some time already 
thinking about it:

  - The animation interface should be decoupled from the actual 
animation implementation. MPageSwitchAnimation for instance would 
consist of merely the virtual interface for setting up and controlling 
the animation (new page, old page, direction, etc.). This is easy to do 
as it's all internal API to MTF.

- From MPageSwitchAnimation is then derived the concrete 
implementation(s) of the animation, something like 
MPageSwitchSlideAnimation or MPageSwitchCoolExplosionAnimation. In the 
same way as views these could be registered with the system and 
therefore new animations could be added by providing a separate library 
(for example with the theme).

- To make the animation implementation selectable per theme, the same 
pattern of how the widget views are chosen at runtime could be used:
   - A new factory method MTheme::animation() (compare to MTheme::view) 
for constructing the correct class as declared in the theme.
   - In the theme libmeegotouchcore.conf file there would be entries for 
the animations to map to abstract animation to the concrete 
implementation, using the same syntax as for the views.

Regards,
Tomas