/// <summary>
/// Remove the adorner from the adorner layer and let it be garbage collected.
/// </summary>
private void RemoveAdorner()
{
//
// Stop the timer that might be about to fade out the adorner.
//
closeAdornerTimer.Stop();
if (this.adornerLayer != null && this.adorner != null)
{
this.adornerLayer.Remove(this.adorner);
this.adorner.DisconnectChild();
}
this.adorner = null;
this.adornerLayer = null;
//
// Ensure that the state of the adorned control reflects that
// the the adorner is no longer.
//
this.IsAdornerVisible = false;
this.adornerShowState = AdornerShowState.Hidden;
}
/// <summary>
/// Internal method to show the adorner.
/// </summary>
private void ShowAdornerInternal()
{
if (this.adorner != null)
{
// Already adorned.
return;
}
if (this.AdornerContent != null)
{
if (this.adornerLayer == null)
{
this.adornerLayer = AdornerLayer.GetAdornerLayer(this);
}
if (this.adornerLayer != null)
{
FrameworkElement adornedControl = this; // The control to be adorned defaults to 'this'.
if (!string.IsNullOrEmpty(this.AdornedTemplatePartName))
{
//
// If 'AdornedTemplatePartName' is set to a valid string then search the visual-tree
// for a UI element that has the specified part name. If we find it then use it as the
// adorned control, otherwise throw an exception.
//
adornedControl = FindNamedChild(this, this.AdornedTemplatePartName);
if (adornedControl == null)
{
throw new ApplicationException("Failed to find a FrameworkElement in the visual-tree with the part name '" + this.AdornedTemplatePartName + "'.");
}
}
this.adorner = new FrameworkElementAdorner(this.AdornerContent, adornedControl,
this.HorizontalAdornerPlacement, this.VerticalAdornerPlacement,
this.AdornerOffsetX, this.AdornerOffsetY);
this.adornerLayer.Add(this.adorner);
UpdateAdornerDataContext();
}
}
this.adornerShowState = AdornerShowState.Visible;
}
/// <summary>
/// Internal method to hide the adorner.
/// </summary>
private void HideAdornerInternal()
{
if (this.adornerLayer == null || this.adorner == null)
{
// Not already adorned.
return;
}
//
// Stop the timer that might be about to fade out the adorner.
//
closeAdornerTimer.Stop();
this.adornerLayer.Remove(this.adorner);
this.adorner.DisconnectChild();
this.adorner = null;
this.adornerLayer = null;
//
// Ensure that the state of the adorned control reflects that
// the the adorner is no longer.
//
this.adornerShowState = AdornerShowState.Hidden;
}
/// <summary>
/// Remove the _adorner from the _adorner layer and let it be garbage collected.
/// </summary>
private void RemoveAdorner()
{
//
// Stop the timer that might be about to fade out the _adorner.
//
closeAdornerTimer.Stop();
if (this._adornerLayer != null && this._adorner != null)
{
this._adornerLayer.Remove(this._adorner);
this._adorner.DisconnectChild();
}
this._adorner = null;
this._adornerLayer = null;
//
// Ensure that the state of the adorned control reflects that
// the the _adorner is no longer.
//
this.IsAdornerVisible = false;
this._adornerShowState = AdornerShowState.Hidden;
}
/// <summary>
/// Instance the _adorner and add it to the _adorner layer.
/// </summary>
private void AddAdorner()
{
if (this.AdornerContent != null)
{
if (this._adornerLayer == null)
{
this._adornerLayer = AdornerLayer.GetAdornerLayer(this);
}
if (this._adornerLayer != null)
{
FrameworkElement adornedControl = this; // The control to be adorned defaults to 'this'.
if (!string.IsNullOrEmpty(this.AdornedTemplatePartName))
{
//
// If 'AdornedTemplatePartName' is set to a valid string then search the visual-tree
// for a UI element that has the specified part name. If we find it then use it as the
// adorned control, otherwise throw an exception.
//
adornedControl = FindNamedChild(this, this.AdornedTemplatePartName);
if (adornedControl == null)
{
throw new ApplicationException("Failed to find a FrameworkElement in the visual-tree with the part name '" + this.AdornedTemplatePartName + "'.");
}
}
this._adorner = new FrameworkElementAdorner(this.AdornerContent, adornedControl,
this.HorizontalAdornerPlacement, this.VerticalAdornerPlacement,
this.AdornerOffsetX, this.AdornerOffsetY);
_adornerLayer.Add(this._adorner);
//
// Update the layout of the _adorner layout so that clients that depend
// on the 'AdornerShown' event can use the visual tree of the _adorner.
//
_adornerLayer.UpdateLayout();
UpdateAdornerDataContext();
}
}
}
/// <summary>
/// Invokes the action.
/// </summary>
/// <param name="parameter">The parameter to the action. If the Action does not require a parameter, the parameter may be set to a null reference.</param>
protected override void Invoke(object parameter)
{
// See if we were passed a parameter indicating whether to run our action or reverse the action.
// Assume to run if not supplied.
bool isThemeEnabled;
if (parameter == null || !Boolean.TryParse(parameter.ToString(), out isThemeEnabled))
{
isThemeEnabled = true;
}
// Reversing theme? Remove resources.
if (!isThemeEnabled)
{
this.AssociatedObject.Resources.MergedDictionaries.Clear();
return;
}
// Running action -- no theme supplied? Nothing to do.
if (this.ThemeUri == null)
{
return;
}
// See if the element we're applied to is loaded. If not, we can't do our theme switch
// here, instead we need to wait until it's loaded.
if (!this.AssociatedObject.IsLoaded)
{
// Hook up a temporary handler
RoutedEventHandler waitForLoad = null;
waitForLoad = (s, e) => {
this.AssociatedObject.Loaded -= waitForLoad;
this.Invoke(isThemeEnabled);
};
this.AssociatedObject.Loaded += waitForLoad;
return;
}
// Apply the theme.
try
{
ResourceDictionary rd = Application.LoadComponent(this.ThemeUri) as ResourceDictionary;
if (rd != null)
{
// See if we have content, and it's a UIElement type -- if so, we will try to gradually
// fade the content for a nice effect. We also require an Adorner Layer to be present
// in the Window's control template
UIElement elementContent = this.AssociatedObject.Content as UIElement;
AdornerLayer adornerLayer = AdornerLayer.GetAdornerLayer(elementContent ?? this.AssociatedObject);
if (elementContent == null || adornerLayer == null)
{
// No layer, just replace the theme.
this.AssociatedObject.Resources.MergedDictionaries.Clear();
this.AssociatedObject.Resources.MergedDictionaries.Add(rd);
return;
}
int width, height;
if (elementContent is FrameworkElement)
{
FrameworkElement fe = (FrameworkElement)elementContent;
width = (int)fe.ActualWidth;
height = (int)fe.ActualHeight;
}
else
{
width = (int)(this.AssociatedObject.ActualWidth - SystemParameters.BorderWidth * 2);
height = (int)(this.AssociatedObject.ActualHeight - SystemParameters.CaptionHeight);
}
// Capture a bitmap of the current screen.
var currentContent = (Visual)VisualTreeHelper.GetChild(this.AssociatedObject, 0);
RenderTargetBitmap rtb = new RenderTargetBitmap(width, height, 96, 96, PixelFormats.Pbgra32);
rtb.Render(currentContent);
var staticImage = new Image {
Source = rtb, Stretch = Stretch.None, HorizontalAlignment = HorizontalAlignment.Center, VerticalAlignment = VerticalAlignment.Top
};
var imageAdorner = new FrameworkElementAdorner(elementContent, staticImage);
adornerLayer.Add(imageAdorner);
// Merge the resources in.
this.AssociatedObject.Resources.MergedDictionaries.Clear();
this.AssociatedObject.Resources.MergedDictionaries.Add(rd);
// Now animate the opacity of the image out so we can see the real controls
// underneath, then drop the image off.
DoubleAnimation doubleAnimation = new DoubleAnimation(1, 0, new Duration(TimeSpan.FromMilliseconds(1500)));
doubleAnimation.Completed += (s, e) =>
{
adornerLayer.Remove(imageAdorner);
this.RaiseThemeChanged();
};
staticImage.BeginAnimation(UIElement.OpacityProperty, doubleAnimation);
}
}
catch
{
}
}
/// <summary>
/// Internal method to show the adorner.
/// </summary>
private void ShowAdornerInternal()
{
if (_adorner != null)
{
// Already adorned.
return;
}
if (AdornerContent != null)
{
if (_adornerLayer == null)
{
_adornerLayer = AdornerLayer.GetAdornerLayer(this);
}
//todo investigate why is null in dialog view
if (_adornerLayer == null)
{
return;
}
_adorner = new FrameworkElementAdorner(AdornerContent, this, HorizontalAdornerPlacement, VerticalAdornerPlacement, AdornerOffsetX, AdornerOffsetY);
_adornerLayer.Add(_adorner);
UpdateAdornerDataContext();
//_adorner.Visibility = Visibility.Visible;
}
}
/// <summary>
/// Internal method to hide the adorner.
/// </summary>
private void HideAdornerInternal()
{
if (_adornerLayer == null || _adorner == null)
{
// Not already adorned.
return;
}
_adornerLayer.Remove(_adorner);
_adorner.DisconnectChild();
//_adorner.Visibility = Visibility.Hidden;
_adorner = null;
_adornerLayer = null;
}