Convert WPF control in Silverlight - wpf

Question

There is an very old WPF application of Hyper Tree - http://blogs.msdn.com/b/llobo/archive/2007/10/31/mindmap-app-using-hyperbolic-tree.aspx.
The source code can be found at codeplax.com -
http://hypertree.codeplex.com/releases/view/11524
I wanted to use this tree control in my silverlight application. Now the issue is that i am new to silverlight, and the code is using some WPF specific things.
Please suggest me to solve my problem.
Thanks in advance.
Abhinav
Update:
things like
FrameworkPropertyMetadata and FrameworkPropertyMetadataOptions, InvalidateVisual(), OnRender override, child UIElements.
Code Added:
public class SmartBorder : Decorator
{
#region Dependency Properties
public static readonly DependencyProperty GlowBrushProperty =
DependencyProperty.Register("GlowBrush", typeof(Brush), typeof(SmartBorder), new FrameworkPropertyMetadata(null, FrameworkPropertyMetadataOptions.AffectsRender));
......
#region Dependency Property backing CLR properties
......
#endregion
// if the button is pressed, this fires
private static void OnRenderIsPressedChanged(DependencyObject o, DependencyPropertyChangedEventArgs e)
{
SmartBorder border = o as SmartBorder;
if (border != null)
{
if ((bool)e.NewValue == true)
{
border.BorderBrush = Brushes.Transparent;
border.BorderWidth = 2;
}
else
{
border.BorderBrush = Brushes.Red;
border.BorderWidth = 2;
}
border.InvalidateVisual();
}
}
// if the mouse is over the control, this fires
private static void OnRenderIsMouseOverChanged(DependencyObject o, DependencyPropertyChangedEventArgs e)
{
SmartBorder border = o as SmartBorder;
if (border != null)
{
border.InvalidateVisual();
}
}
// a series of methods which all make getting the default or currently selected brush easier
protected override void OnRender(DrawingContext dc)
{
Rect rc = new Rect(0, 0, this.ActualWidth, this.ActualHeight);
LinearGradientBrush gradientOverlay = GetGradientOverlay();
Brush glowBrush = GetGlowBrush();
Brush backBrush = GetBackgroundBrush();
Brush borderBrush = GetBorderBrush();
Pen borderPen = new Pen(borderBrush, BorderWidth);
double cornerRadiusCache = CornerRadius;
// draw the highlight as necessary
if (RenderIsMouseOver)
{
Rect rcGlow = rc;
double glowMove = BorderWidth * 2;
rcGlow.Inflate(glowMove, glowMove);
glowMove = 0;
rcGlow.Offset(new Vector(glowMove, glowMove));
dc.DrawRoundedRectangle(GetOuterGlowBrush(), null, rcGlow, cornerRadiusCache, cornerRadiusCache);
}
// we want to clip anything that might errantly draw outside of the smart border control
dc.PushClip(new RectangleGeometry(rc, cornerRadiusCache, cornerRadiusCache));
dc.DrawRoundedRectangle(backBrush, borderPen, rc, cornerRadiusCache, cornerRadiusCache);
dc.DrawRoundedRectangle(gradientOverlay, borderPen, rc, cornerRadiusCache, cornerRadiusCache);
if (!RenderIsPressed)
{
double clipBorderSize = BorderWidth * -4.0;
Rect rcClip = rc;
rcClip.Offset(clipBorderSize, clipBorderSize);
rcClip.Inflate(-clipBorderSize, -clipBorderSize);
dc.PushClip(new RectangleGeometry(rcClip, cornerRadiusCache, cornerRadiusCache));
dc.DrawEllipse(glowBrush, null, new Point(this.ActualWidth / 2, this.ActualHeight * 0.10), this.ActualWidth * 0.80, this.ActualHeight * 0.40);
dc.Pop();
}
// just draw the border now to make sure it overlaps everything nicely
dc.DrawRoundedRectangle(null, borderPen, rc, cornerRadiusCache, cornerRadiusCache);
dc.Pop();
//base.OnRender(drawingContext);
}
protected override Size MeasureOverride(Size constraint)
{
UIElement child = this.Child as UIElement;
double borderThickness = BorderWidth * 2.0;
if (child != null)
{
...
}
return new Size(Math.Min(borderThickness, constraint.Width), Math.Min(borderThickness, constraint.Height));
}
}

Answer 1

Regarding FrameworkPropertyMetadata and FrameworkPropertyMetadataOptions and value coercions etc. for Silverlight see the WPF_Compatibility solution under the ClipFlair codebase (http://clipflair.codeplex.com)