private static void OnTraceEnabledChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
var triggerBase = d as TriggerBase;
if (triggerBase == null)
{
return;
}
if (!(e.NewValue is bool))
{
return;
}
if ((bool)e.NewValue)
{
// insert dummy story-boards which can later be traced using WPF animation tracing
if (triggerBase is EventTrigger evTrigger)
{
var storyboard = new TriggerTraceStoryboard(triggerBase, TriggerTraceStoryboardType.Fire);
evTrigger.Actions.Insert(0, new BeginStoryboard()
{
Storyboard = storyboard
});
}
else
{
var storyboard = new TriggerTraceStoryboard(triggerBase, TriggerTraceStoryboardType.Enter);
triggerBase.EnterActions.Insert(0, new BeginStoryboard()
{
Storyboard = storyboard
});
storyboard = new TriggerTraceStoryboard(triggerBase, TriggerTraceStoryboardType.Exit);
triggerBase.ExitActions.Insert(0, new BeginStoryboard()
{
Storyboard = storyboard
});
}
}
else
{
// remove the dummy storyboards
foreach (TriggerActionCollection actionCollection in new[] { triggerBase.EnterActions, triggerBase.ExitActions })
{
foreach (TriggerAction triggerAction in actionCollection)
{
BeginStoryboard bsb = triggerAction as BeginStoryboard;
if (bsb != null && bsb.Storyboard != null && bsb.Storyboard is TriggerTraceStoryboard)
{
actionCollection.Remove(bsb);
break;
}
}
}
}
}
public override void TraceEvent(TraceEventCache eventCache, string source, TraceEventType eventType, int id,
string format, params object[] args)
{
base.TraceEvent(eventCache, source, eventType, id, format, args);
if (format.StartsWith("Storyboard has begun;", StringComparison.Ordinal))
{
TriggerTraceStoryboard storyboard = args[1] as TriggerTraceStoryboard;
if (storyboard != null)
{
// add a breakpoint here to see when your trigger has been entered or exited
// the element being acted upon
object targetElement = args[5];
// the namescope of the element being acted upon
INameScope namescope = (INameScope)args[7];
TriggerBase triggerBase = storyboard.TriggerBase;
string triggerName = GetTriggerName(storyboard.TriggerBase);
Debug.WriteLine(
$"Element: {targetElement}, {triggerBase.GetType().Name}: {triggerName}: {storyboard.StoryboardType}");
}
}
}
public override void TraceEvent(TraceEventCache eventCache, string source, TraceEventType eventType, int id, string format, params object[] args)
{
base.TraceEvent(eventCache, source, eventType, id, format, args);
if (format.StartsWith("Storyboard has begun;"))
{
TriggerTraceStoryboard storyboard = args[1] as TriggerTraceStoryboard;
if (storyboard != null)
{
// add a breakpoint here to see when your trigger has been
// entered or exited
// the element being acted upon
object targetElement = args[5];
TriggerBase triggerBase = storyboard.TriggerBase;
string triggerName = GetTriggerName(storyboard.TriggerBase);
Debug.WriteLine(string.Format("Element: {0}, {1}: {2}: {3}",
targetElement,
triggerBase.GetType().Name,
triggerName,
storyboard.StoryboardType));
}
}
}
private static void OnTraceEnabledChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
var triggerBase = d as TriggerBase;
if (triggerBase == null)
return;
if (!(e.NewValue is bool))
return;
if ((bool)e.NewValue)
{
// insert dummy story-boards which can later be traced using WPF animation tracing
var storyboard = new TriggerTraceStoryboard(triggerBase, TriggerTraceStoryboardType.Enter);
triggerBase.EnterActions.Insert(0, new BeginStoryboard() { Storyboard = storyboard });
storyboard = new TriggerTraceStoryboard(triggerBase, TriggerTraceStoryboardType.Exit);
triggerBase.ExitActions.Insert(0, new BeginStoryboard() { Storyboard = storyboard });
}
else
{
// remove the dummy storyboards
foreach (TriggerActionCollection actionCollection in new[] { triggerBase.EnterActions, triggerBase.ExitActions })
{
foreach (TriggerAction triggerAction in actionCollection)
{
BeginStoryboard bsb = triggerAction as BeginStoryboard;
if (bsb != null && bsb.Storyboard != null && bsb.Storyboard is TriggerTraceStoryboard)
{
actionCollection.Remove(bsb);
break;
}
}
}
}
}
