We had some animation effects that were executed on the element creation or removal but we hugely extended the possibility by allowing you to much more control over what you can achieve.
Now you can specify what parameter you would like to tween, what is the starting value, ending value, when the tween suppose to start and for how long it should work! And you can specify any number of such commands!!!
To do that, add node <opanim> (for opening animation) and <clanim> (for closing) to any element you would like to apply it to.
for example:
<el eltype="rect" x="100" y="100" w="300" h="200" c="0x456789" a="100" > <opanim> <ae par="_alpha" fr="0" to="100" st="0" ln="1" /> <ae par="_xscale" fr="10" to="100" st="2" ln="2" /> <ae par="_xscale" fr="100" to="10" st="1" ln="1" /> </opanim> </el>
