protected override void OnRender(DrawingContext drawingContext)
{
Rect adornedElementRect = new Rect(this.AdornedElement.DesiredSize);
SolidColorBrush renderBrush = (SolidColorBrush)Application.Current.Resources["AdornerDiagramBrush"];
renderBrush.Opacity = 0.5;
DroppingElementAdornerType adornertype = (this.AdornedElement as Controls.ConnectionDiagramBase)?.AdornerType ?? DroppingElementAdornerType.DrawEllipse;
Pen renderPen = new Pen((SolidColorBrush)Application.Current.Resources["AdornerDiagramBrush"], 1.5);
double renderRadius = 5.0;
if (DroppingElementAdornerType.DrawEllipse.Equals(adornertype))
{
// Draw a circle at each corner.
drawingContext.DrawEllipse(renderBrush, renderPen, adornedElementRect.TopLeft, renderRadius, renderRadius);
drawingContext.DrawEllipse(renderBrush, renderPen, adornedElementRect.TopRight, renderRadius, renderRadius);
drawingContext.DrawEllipse(renderBrush, renderPen, adornedElementRect.BottomLeft, renderRadius, renderRadius);
drawingContext.DrawEllipse(renderBrush, renderPen, adornedElementRect.BottomRight, renderRadius, renderRadius);
}
else if (DroppingElementAdornerType.DrawLine.Equals(adornertype))
{
renderPen.DashStyle = DashStyles.Dash;
renderPen.Thickness = 6.0;
drawingContext.DrawLine(renderPen, adornedElementRect.TopLeft, adornedElementRect.TopRight);
drawingContext.DrawLine(renderPen, adornedElementRect.TopLeft, adornedElementRect.BottomLeft);
drawingContext.DrawLine(renderPen, adornedElementRect.TopRight, adornedElementRect.BottomRight);
drawingContext.DrawLine(renderPen, adornedElementRect.BottomLeft, adornedElementRect.BottomRight);
}
else
{
//TODO:Extention
}
}
/// <summary>
/// Sets the value of the AdornerType attached property
/// for a given dependency object.
/// </summary>
/// <param name="obj">The object to which the property value
/// is written.</param>
/// <param name="value">Sets the AdornerType value of the specified object.</param>
public static void SetAdornerType(DependencyObject obj, DroppingElementAdornerType value)
{
obj.SetValue(AdornerTypeProperty, value);
}
protected override void OnRender(DrawingContext drawingContext)
{
Rect adornedElementRect = new Rect(this.AdornedElement.DesiredSize);
SolidColorBrush renderBrush = (SolidColorBrush)Application.Current.Resources["AdornerPanelBrush"];
renderBrush.Opacity = 0.5;
Pen renderPen = new Pen((SolidColorBrush)Application.Current.Resources["AdornerPanelBrush"], 1.5);
double renderRadius = 5.0;
DroppingElementAdornerType adornertype = DiagramElementDropBehavior.GetAdornerType(this.AdornedElement);
if (DroppingElementAdornerType.DrawEllipse.Equals(adornertype))
{
// Draw a circle at each corner.
drawingContext.DrawEllipse(renderBrush, renderPen, adornedElementRect.TopLeft, renderRadius, renderRadius);
drawingContext.DrawEllipse(renderBrush, renderPen, adornedElementRect.TopRight, renderRadius, renderRadius);
drawingContext.DrawEllipse(renderBrush, renderPen, adornedElementRect.BottomLeft, renderRadius, renderRadius);
drawingContext.DrawEllipse(renderBrush, renderPen, adornedElementRect.BottomRight, renderRadius, renderRadius);
}
else if (DroppingElementAdornerType.DrawLine.Equals(adornertype))
{
renderPen.DashStyle = DashStyles.DashDot;
renderPen.Thickness = renderRadius;
drawingContext.DrawLine(renderPen, adornedElementRect.TopLeft, adornedElementRect.TopRight);
drawingContext.DrawLine(renderPen, adornedElementRect.TopLeft, adornedElementRect.BottomLeft);
drawingContext.DrawLine(renderPen, adornedElementRect.TopRight, adornedElementRect.BottomRight);
drawingContext.DrawLine(renderPen, adornedElementRect.BottomLeft, adornedElementRect.BottomRight);
}
else
{
//get the custom adorner from drop element
UIElement uc = DiagramElementDropBehavior.GetCustomAdornerContent(this.AdornedElement);
// Create the visual brush based on the UserControl
VisualBrush vb = new VisualBrush(uc);
//get the alignment
HorizontalAlignment horizon = (HorizontalAlignment)uc.GetValue(HorizontalAlignmentProperty);
VerticalAlignment vertical = (VerticalAlignment)uc.GetValue(VerticalAlignmentProperty);
if (horizon == HorizontalAlignment.Left)
{
drawingContext.DrawRectangle(vb, null, new Rect(0, 0, renderRadius, ActualHeight));
}
else if (horizon == HorizontalAlignment.Right)
{
drawingContext.DrawRectangle(vb, null, new Rect(ActualWidth, 0, renderRadius, ActualHeight));
}
else if (vertical == VerticalAlignment.Center)
{
drawingContext.DrawRectangle(vb, null, new Rect(ActualWidth / 2, 0, renderRadius, ActualHeight));
}
if (vertical == VerticalAlignment.Bottom)
{
drawingContext.DrawRectangle(vb, null, new Rect(0, ActualHeight, ActualWidth, renderRadius));
}
else if (vertical == VerticalAlignment.Top)
{
drawingContext.DrawRectangle(vb, null, new Rect(0, 0, ActualWidth, renderRadius));
}
else if (vertical == VerticalAlignment.Center)
{
drawingContext.DrawRectangle(vb, null, new Rect(0, ActualWidth / 2, ActualWidth, renderRadius));
}
if (vertical == VerticalAlignment.Stretch && horizon == HorizontalAlignment.Stretch)
{
drawingContext.DrawRectangle(vb, null, new Rect(0, 0, renderRadius, ActualHeight));
drawingContext.DrawRectangle(vb, null, new Rect(ActualWidth - renderRadius, 0, renderRadius, ActualHeight));
drawingContext.DrawRectangle(vb, null, new Rect(0, ActualHeight - renderRadius, ActualWidth, renderRadius));
drawingContext.DrawRectangle(vb, null, new Rect(0, 0, ActualWidth, renderRadius));
}
//// Draw using the visual brush in the rect at 10,10,100,25
////var grayBrush = renderBrush;
////left
////drawingContext.DrawRectangle(grayBrush, null, new System.Windows.Rect(1, 1, 5, ActualHeight));
////right
////drawingContext.DrawRectangle(grayBrush, null, new System.Windows.Rect(ActualWidth - 6, 1, 5, ActualHeight));
////bottom
////drawingContext.DrawRectangle(grayBrush, null, new System.Windows.Rect(1, ActualHeight, ActualWidth - 2, 5));
}
}
