protected override void OnApplyTemplate()
{
base.OnApplyTemplate();
//get required parts
_mainGrid = GetTemplateChild(MainGridPart) as Grid;
if (_mainGrid == null)
{
throw new NullReferenceException($"{MainGridPart} is missing in the control template");
}
//inherit defaultOverlaySize
var parent = OverlayItemsControl.GetParent <OverlayItemsControl>(this);
if (parent != null && DefaultOverlaySize == null && GetBindingExpression(DefaultOverlaySizeProperty) == null)
{
SetBinding(DefaultOverlaySizeProperty, new Binding()
{
Path = new PropertyPath("DefaultOverlaySize"), Source = parent
});
}
//hide the grid by default - if nothing databound to it
_mainGrid.Visibility = Visibility.Collapsed;
UpdateOverlays();
}
void OnVisualStateChanged(object sender, OverlayInfoState e)
{
//update effects
if (_presenter == null)
{
_presenter = OverlayItemsControl.GetParent <OverlayPresenter>(this);
}
if (_presenter != null)
{
_presenter.OverlayVisualStateChanged(this, e, Effects);
}
}
protected override void OnApplyTemplate()
{
base.OnApplyTemplate();
//inherit defaultOverlaySize
var parent = OverlayItemsControl.GetParent <OverlayLabel>(this);
if (parent != null && OverlayInfo == null && GetBindingExpression(OverlayInfoProperty) == null)
{
SetBinding(OverlayInfoProperty, new Binding()
{
Path = new PropertyPath("OverlayInfo"), Source = parent
});
}
//set initial state
var overlayInfo = OverlayInfo;
if (overlayInfo != null)
{
OnVisualStateChanged(overlayInfo, overlayInfo.VisualState);
}
}