private void ParseKeyframes(XmlReader r)
{
// TODO: catch empty tag <Keyframes/>.
// Note: unlike chrono and tracks, keyframes are "merged" into existing keyframes if one already exists at the same position.
// This has an impact on how we add drawings.
// We keep the drawings internally to the keyframe during the parse, and only perform the post-drawing init at the end,
// when the keyframe is merge-inserted into the collection.
// For chrono and tracks on the other hand, we perform the post-drawing init on the fly during the parse.
r.ReadStartElement();
while (r.NodeType == XmlNodeType.Element)
{
if (r.Name == "Keyframe")
{
Keyframe keyframe = KeyframeSerializer.Deserialize(r, GetScaling(), RemapTimestamp, metadata);
if (keyframe != null)
{
metadata.MergeInsertKeyframe(keyframe);
}
}
else
{
string unparsed = r.ReadOuterXml();
log.DebugFormat("Unparsed content in KVA XML: {0}", unparsed);
}
}
r.ReadEndElement();
}
public override HistoryMemento PerformUndo()
{
HistoryMemento redoMemento = new HistoryMementoAddKeyframe(metadata, keyframeId);
redoMemento.CommandName = commandName;
Keyframe keyframe = KeyframeSerializer.DeserializeMemento(data, metadata);
metadata.AddKeyframe(keyframe);
return(redoMemento);
}
public HistoryMementoDeleteKeyframe(Metadata metadata, Guid keyframeId)
{
this.metadata = metadata;
this.keyframeId = keyframeId;
// TODO: save the complete keyframe to XML (including the thumbnail).
// Including all drawings and trackable drawings associated with these drawings.
Keyframe keyframe = metadata.GetKeyframe(keyframeId);
if (keyframe == null)
{
throw new NullReferenceException("keyframe");
}
data = KeyframeSerializer.SerializeMemento(metadata, keyframe);
}
private void WriteKeyframes(XmlWriter w)
{
int enabled = metadata.Keyframes.Count(kf => !kf.Disabled);
if (enabled == 0)
{
return;
}
w.WriteStartElement("Keyframes");
foreach (Keyframe kf in metadata.Keyframes.Where(kf => !kf.Disabled))
{
KeyframeSerializer.Serialize(w, kf);
}
w.WriteEndElement();
}