June 2017
Intermediate to advanced
873 pages
18h 9m
English
Content preview from Dart: Scalable Application Development
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Animating slides
The fullscreen display only has one slide at any time. A new slide will be initially placed on the top of the screen and will be gently lowered into view. The old slide will, from the presentation viewer's point of view, vanish instantly.
Using a timer
The periodic timer in Dart should be a familiar friend of yours by now. This is used to check whether the slide has reached the final position. If it is not there yet, then the position is updated:
new Timer.periodic(new Duration(milliseconds: 50), (timer) {
if (isFullScreen && liveSlideY < 0) {
liveSlide.style.top = liveSlideY.toString() + "px";
liveSlideY += 50;
}
});You may be concerned ...
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