/// <summary>
/// The colleciton is the children collection of the visualParent. The logicalParent
/// is used to do logical parenting. The flags is used to invalidate
/// the resource properties in the child tree, if an Application object exists.
/// </summary>
/// <param name="visualParent">The element of whom this is a children collection</param>
/// <param name="logicalParent">The logicalParent of the elements of this collection.
/// if overriding Panel.CreateUIElementCollection, pass the logicalParent parameter of that method here.
/// </param>
public UIElementCollection(UIElement visualParent, FrameworkElement logicalParent)
{
if (visualParent == null)
{
throw new ArgumentNullException(SR.Get(SRID.Panel_NoNullVisualParent, "visualParent", this.GetType()));
}
_visualChildren = new VisualCollection(visualParent);
_visualParent = visualParent;
_logicalParent = logicalParent;
}
public MyVisualHost()
{
_children = new System.Windows.Media.VisualCollection(this)
{
CreateDrawingVisualAA(),
//CreateDrawingImage(),
//CreateDrawingVisualRectangle(),
//CreateDrawingVisualText(),
//CreateDrawingVisualEllipses()
};
// Add the event handler for MouseLeftButtonUp.
MouseLeftButtonUp += MyVisualHost_MouseLeftButtonUp;
}
// Initialize the ResizingAdorner.
public ResizingAdorner(System.Windows.UIElement adornedElement)
: base(adornedElement)
{
visualChildren = new VisualCollection(this);
// Call a helper method to initialize the Thumbs
// with a customized cursors.
BuildAdornerCorner(ref topLeft, Cursors.SizeNWSE);
BuildAdornerCorner(ref topRight, Cursors.SizeNESW);
BuildAdornerCorner(ref bottomLeft, Cursors.SizeNESW);
BuildAdornerCorner(ref bottomRight, Cursors.SizeNWSE);
// Add handlers for resizing.
bottomLeft.DragDelta += new DragDeltaEventHandler(HandleBottomLeft);
bottomRight.DragDelta += new DragDeltaEventHandler(HandleBottomRight);
topLeft.DragDelta += new DragDeltaEventHandler(HandleTopLeft);
topRight.DragDelta += new DragDeltaEventHandler(HandleTopRight);
}
internal Enumerator(VisualCollection collection)
{
_collection = collection;
_index = -1; // not started.
_version = _collection.Version;
_currentElement = null;
}
/// <summary>
/// Ctor ContainerVisual.
/// </summary>
public ContainerVisual()
{
_children = new VisualCollection(this);
}
//---------------------------------------------------------------
// Ctor
//---------------------------------------------------------------
internal ComplexContent(TextBlock owner, ITextContainer textContainer, bool foreignTextContianer, string content)
{
// Paramaters validation
Debug.Assert(owner != null);
Debug.Assert(textContainer != null);
VisualChildren = new VisualCollection(owner);
// Store TextContainer that contains content of the element.
TextContainer = textContainer;
ForeignTextContainer = foreignTextContianer;
// Add content
if (content != null && content.Length > 0)
{
TextBlock.InsertTextRun(this.TextContainer.End, content, /*whitespacesIgnorable:*/false);
}
// Create TextView associated with TextContainer.
this.TextView = new TextParagraphView(owner, TextContainer);
// Hookup TextContainer to TextView.
this.TextContainer.TextView = this.TextView;
}
/// <summary>
/// Ctor ContainerVisual.
/// </summary>
public ContainerVisual()
{
_children = new VisualCollection(this);
}
public RectDrawingVisual()
{
Visuals = new System.Windows.Media.VisualCollection(this);
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="context">Dispatcher</param>
/// <remarks>
/// Note that because we're setting up an event handler here, we won't be GC'd until
/// our parent is GC'd. So the implicit assumption is that the AdornerLayer, once
/// created, exists until its parent is deleted.
/// </remarks>
internal AdornerLayer(Dispatcher context)
{
if (context == null)
throw new ArgumentNullException("context");
LayoutUpdated += new EventHandler(OnLayoutUpdated);
_children = new VisualCollection(this);
}
