/// <summary>
/// Called when the NodeModel's CachedValue property is updated
/// </summary>
private void CachedValueChanged()
{
Dispatcher.BeginInvoke(new Action(delegate
{
// There is no preview control or the preview control is
// currently in transition state (it can come back to handle
// the new data later on when it is ready).
if ((previewControl == null))
{
return;
}
// Enqueue an update of the preview control once it has completed its
// transition
if (previewControl.IsInTransition)
{
previewControl.EnqueueBindToDataSource(ViewModel.NodeModel.CachedValue);
return;
}
if (previewControl.IsHidden) // The preview control is hidden.
{
// Invalidate the previously bound data, if any.
if (previewControl.IsDataBound)
{
previewControl.BindToDataSource(null);
}
return;
}
previewControl.BindToDataSource(ViewModel.NodeModel.CachedValue);
}));
}
/// <summary>
/// Whenever property "NodeModel.IsUpdated" is set to true, this method
/// is invoked. It will result in preview control updated, if the control
/// is currently visible. Otherwise this call will be ignored.
/// </summary>
///
private void HandleCacheValueUpdated()
{
Dispatcher.BeginInvoke(new Action(delegate
{
// There is no preview control or the preview control is
// currently in transition state (it can come back to handle
// the new data later on when it is ready).
if ((previewControl == null) || previewControl.IsInTransition)
{
return;
}
if (previewControl.IsHidden) // The preview control is hidden.
{
// Invalidate the previously bound data, if any.
if (previewControl.IsDataBound)
{
previewControl.BindToDataSource(null);
}
return;
}
previewControl.BindToDataSource(
ViewModel.NodeLogic.GetCachedValueFromEngine(
ViewModel.DynamoViewModel.EngineController));
}));
}
private void TryShowPreviewBubbles()
{
nodeWasClicked = false;
// Always set old ZIndex to the last value, even if mouse is not over the node.
oldZIndex = NodeViewModel.StaticZIndex;
// There is no need run further.
if (IsPreviewDisabled())
{
return;
}
if (PreviewControl.IsInTransition) // In transition state, come back later.
{
return;
}
if (PreviewControl.IsHidden)
{
if (!previewControl.IsDataBound)
{
PreviewControl.BindToDataSource();
}
PreviewControl.TransitionToState(PreviewControl.State.Condensed);
}
Dispatcher.DelayInvoke(previewDelay, BringToFront);
}
/// <summary>
/// Called when the NodeModel's CachedValue property is updated
/// </summary>
private void CachedValueChanged()
{
Dispatcher.BeginInvoke(new Action(delegate
{
// There is no preview control or the preview control is
// currently in transition state (it can come back to handle
// the new data later on when it is ready).
// If node is frozen, we shouldn't update cached value.
// We keep value, that was before freezing.
if ((previewControl == null) || ViewModel.IsFrozen)
{
return;
}
// Enqueue an update of the preview control once it has completed its
// transition
if (previewControl.IsInTransition)
{
previewControl.RequestForRefresh();
return;
}
if (previewControl.IsHidden) // The preview control is hidden.
{
previewControl.IsDataBound = false;
return;
}
previewControl.BindToDataSource();
}));
}
