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Animation in Glimmer [message #565564] Mon, 14 April 2008 00:21
Andy Maleh is currently offline Andy MalehFriend
Messages: 28
Registered: July 2009
Junior Member
Nicolas Richeton recently wrote a library for animation called SAT (SWT
Animation Toolkit):

Animation in SAT typically works by launching an effect with specific
parameters. These parameters usually consist of the target widget, start
and end values, duration, movement style, and optional hooks for what
occurs when the event stops or is cancelled by the user.

Some examples of animation effects are changing transperancy (alpha),
resizing, and movement.

This can be easily leveraged in Glimmer. However, before I add support for
it, I'd like to brainstorm a few options for what the syntax will be.

Let's start with a simple example. Below are a few ideas for making a
shell fade out when it is closed. The duration of the effect is 2 seconds
and the effect movement is exponential (relies on ExpoOut class in SAT)

Option 1:

shell {
on_shell_closed {
fade_out {
duration 2.seconds
movement expo_out

Option 2:

shell {
on_shell_closed { fade_out within(2.seconds), with(expo_out) }


shell {
fade_out_on_shell_closed within(2.seconds), with(expo_out)

Note that on_shell_closed is already supported in Glimmer, which is why
I'm leveraging it in Options 1 and 2. Option 3 can still leverage it
behind the scenes by relying on dymanic Ruby evaluation of the code.

What do you think about these options? Could you think of other options or
perhaps improvements to the existing ones?
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