/// <summary>Flattens this element.
/// Returns a promise which fires when the image has been rendered at least once.
/// The promise contains a direct reference to the latest image.</summary>
public Promise flatten()
{
// Obtain the raster data from the render data:
RasterDisplayableProperty rdp = RenderData.RasterProperty;
// Create the resultant promise:
Promise p = new Promise();
// Check if we already have an image:
Texture img = rdp == null ? null : rdp.Output;
if (img != null)
{
// Already got one! Resolve right away:
p.resolve(img);
return(p);
}
// If we don't have an RDP then request a flatten.
// Output is null so we know it'll be getting drawn on the next update.
if (rdp == null)
{
// (no full Loonim effects on this element):
style.Computed.ChangeTagProperty("-spark-filter", "flatten");
}
Dom.EventListener listener = null;
// Wait for the imagechange event:
listener = new Dom.EventListener <Dom.Event>(delegate(Dom.Event e){
// Image changed! Remove this listener:
removeEventListener("imagechange", listener);
// Update the promise:
Texture current = flatImage;
if (current == null)
{
// Unable to flatten this (This should never happen).
p.reject(FLATTEN_FAILED);
}
else
{
p.resolve(flatImage);
}
});
// Add it:
addEventListener("imagechange", listener);
return(p);
}
internal override void start()
{
// Pause it now!
Timeline tl = track.timeline;
tl.setPause(true);
if (tl.backwards)
{
tl.currentTime = 1f - computedStart;
}
else
{
tl.currentTime = computedStart;
}
// Hook up cue elements now:
HTMLCollection targs = cuedBy;
if (targs != null && eventName != null)
{
foreach (Element e in targs)
{
Dom.EventListener <Dom.Event> d = new Dom.EventListener <Dom.Event>(delegate(Dom.Event ev){
// Cued by the cue point!
element.cue();
});
CueElementData ced = new CueElementData(eventName, d, e);
// Add to a list on the timeline:
if (track.timeline.cueElements == null)
{
track.timeline.cueElements = new List <CueElementData>();
}
track.timeline.cueElements.Add(ced);
// Add listener:
e.addEventListener(eventName, d);
}
}
base.start();
}
internal CueElementData(string name, Dom.EventListener <Dom.Event> listener, Element target)
{
eventName = name;
eventListener = listener;
this.target = target;
}