updating SplineDoubleKeyFrame properties from javascript

behaviour is pretty errant, sometimes I can get it working other times don't.

I can't find the logic why it breaks on me.

basically I have in screen 100 elements, all created dynamically, looping over them updating their storyboards props and trying to move them around.

in javascript it goes something like:

for(var n=0;n<100;n++) {

  var target      = wpf.findName(objectID);
  var storyboard    = target.findName(storyboardID);
  var currentValue   = target.findName(objectElementID[objectElementProperty]);
  var startKeyframe  = storyboard.findName(startKeyFrameID);
  var endKeyframe   = storyboard.findName(endKeyFrameID)
  startKeyframe.value = (currentValue).toString();
  endKeyframe.value  = (value).toString();

  // this doesnt work:
  var delay = Math.floor(Math.random()*10)+1;
  endKeyframe.keyTime = "0:0:0."+delay;

  // this works sometimes, sometimes not, depends on the keytime
  // It was bugging making the storyboard jump directly to the last value
  // storyboard.begin();
  // storyboard.stop();
  // the workaround sometimes is
  // storyboard.beginTime = "0:0:0.1";
  storyboard.begin();

}

here's a working demo not really implementing the above, but you might take a look below the hood and see more clearly what I'm trying to do and how I'm trying to do it:

http://marumushi.heteml.jp/temp/wpfe/test-003/

Answer this question

updating SplineDoubleKeyFrame properties from javascript

Jan Meeusen
Unfortunately you can't set a KeyFrame's KeyTime on the fly. My guess is you're running into a roundoff issue on the Storyboards, which shouldn't repro without the BeginTime="1" workaround on the Storyboard.

The way to accomplish what you want here is to create a new Storyboard each time with the appropriate KeyTimes.

Thanks,
Ed Maia
WPF/E Program Manager
updating SplineDoubleKeyFrame properties from javascript

Answer this question

updating SplineDoubleKeyFrame properties from javascript

Hot Topic

Windows Vista

updating SplineDoubleKeyFrame properties from javascript

updating SplineDoubleKeyFrame properties from javascript

Jan Meeusen