private void NodeSelected(DiagramNode sender, RoutedEventArgs eventArguments)
{
if (Selected != null)
{
Selected(sender, eventArguments);
}
}
/// <summary>
///
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
public void OnSelected(DiagramNode sender, RoutedEventArgs e)
{
if (Selected != null)
{
Selected(sender, e);
}
}
/// <summary>
///
/// </summary>
/// <param name="sender"></param>
/// <param name="eventArguments"></param>
protected void OnSelected(DiagramNode sender, RoutedEventArgs eventArguments)
{
if (Selected != null)
{
Selected(sender, eventArguments);
}
}
/// <summary>
///
/// </summary>
/// <param name="sender"></param>
/// <param name="eventArguments"></param>
protected void OnCollapsed(DiagramNode sender, RoutedEventArgs eventArguments)
{
OnSelected(sender, eventArguments);
if (Collapsed != null)
{
Collapsed(this, eventArguments);
}
}
/// <summary>
///
/// </summary>
/// <param name="sender"></param>
/// <param name="eventArguments"></param>
protected void OnExpanded(DiagramNode sender, RoutedEventArgs eventArguments)
{
OnSelected(sender, eventArguments);
if (Expanded != null)
{
Expanded(this, eventArguments);
}
}
private void NodeExpanded(DiagramNode sender, RoutedEventArgs eventArguments)
{
mRootNode.Location = new Point(
(double)GetValue(ActualWidthProperty) / 2.0,
(double)GetValue(ActualHeightProperty) / 2.0);
MakeChildrenVisible(sender);
if (sender.DiagramParent != null)
{
sender.DiagramParent.Visibility = Visibility.Visible;
foreach (DiagramNode sibling in sender.DiagramParent.DiagramChildren)
{
if (sibling != sender)
{
sibling.Visibility = Visibility.Collapsed;
}
}
if (sender.DiagramParent.DiagramParent != null)
{
sender.DiagramParent.DiagramParent.Visibility = Visibility.Collapsed;
}
}
if (sender.DiagramChildren.Count > 0)
{
double startAngle = CalculateStartAngle(sender);
double angleBetweenChildren = (sender == mRootNode ? Math.PI * 2.0 : Math.PI) / ((double)sender.DiagramChildren.Count - 0);
double legDistance = CalculateLegDistance(sender, angleBetweenChildren);
for (int i = 0; i < sender.DiagramChildren.Count; ++i)
{
DiagramNode child = sender.DiagramChildren[i];
child.Selected += NodeSelected;
child.Expanded += NodeExpanded;
child.Collapsed += NodeCollapsed;
Point parentLocation = sender.Location;
child.Location = new Point(
parentLocation.X + Math.Cos(startAngle + angleBetweenChildren * i) * legDistance,
parentLocation.Y + Math.Sin(startAngle + angleBetweenChildren * i) * legDistance);
foreach (DiagramNode childsChild in child.DiagramChildren)
{
childsChild.Visibility = Visibility.Collapsed;
}
}
}
if (mBaseCanvas != null)
{
mBaseCanvas.InvalidateArrange();
mBaseCanvas.UpdateLayout();
mBaseCanvas.InvalidateVisual();
}
}
private void NodeCollapsed(DiagramNode sender, RoutedEventArgs eventArguments)
{
foreach (DiagramNode child in sender.DiagramChildren)
{
child.Visibility = Visibility.Collapsed;
foreach (DiagramNode grandChildren in child.DiagramChildren)
{
grandChildren.Visibility = Visibility.Collapsed;
}
}
if (mBaseCanvas != null)
{
mBaseCanvas.InvalidateArrange();
mBaseCanvas.UpdateLayout();
mBaseCanvas.InvalidateVisual();
}
}
private void MakeChildrenVisible(DiagramNode sender)
{
foreach (DiagramNode child in sender.DiagramChildren)
{
if (mBaseCanvas != null && !mBaseCanvas.Children.Contains(child))
{
mBaseCanvas.Children.Add(child);
}
child.Visibility = Visibility.Visible;
}
if (mBaseCanvas != null)
{
mBaseCanvas.InvalidateArrange();
mBaseCanvas.UpdateLayout();
mBaseCanvas.InvalidateVisual();
}
}
/// <summary>
///
/// </summary>
/// <param name="nodeName"></param>
/// <param name="treeParent"></param>
/// <param name="imageUrl"></param>
/// <param name="itemDescription"></param>
public DiagramNode(string nodeName, DiagramNode treeParent,
string imageUrl, string itemDescription)
{
CommandBindings.Add(new CommandBinding(ExpandCommand, ExpandCommand_Executed, ExpandCommand_CanExecute));
CommandBindings.Add(new CommandBinding(CollapseCommand, CollapseCommand_Executed, CollapseCommand_CanExecute));
ToolTip = itemDescription;
mDiagramParent = treeParent;
NodeName = nodeName;
if (treeParent != null)
{
mDiagramParent.mDiagramChildren.Add(this);
}
BitmapImage image = new BitmapImage();
image.BeginInit();
image.UriSource = new Uri(imageUrl, UriKind.RelativeOrAbsolute);
image.EndInit();
Icon = image;
}
protected override void OnRender(DrawingContext dc)
{
base.OnRender(dc);
foreach (UIElement uiElement in Children)
{
if (uiElement is DiagramNode)
{
DiagramNode node = (DiagramNode)uiElement;
if (node.Visibility == Visibility.Visible)
{
if (node.DiagramParent != null &&
node.DiagramParent.Visibility == Visibility.Visible)
{
dc.DrawLine(new Pen(Brushes.Black, 2.0),
node.Location, node.DiagramParent.Location);
}
}
}
}
}
private static double CalculateLegDistance(DiagramNode sender, double angleBetweenChildren)
{
double legDistance = 1.0;
double childToChildMinDistance = 1.0;
foreach (DiagramNode child in sender.DiagramChildren)
{
legDistance = Math.Max(legDistance, sender.BoundingCircle + child.BoundingCircle);
foreach (DiagramNode otherChild in sender.DiagramChildren)
{
if (otherChild != child)
{
childToChildMinDistance = Math.Max(childToChildMinDistance, child.BoundingCircle + otherChild.BoundingCircle);
}
}
}
legDistance = Math.Max(
legDistance,
(childToChildMinDistance / 2.0) / Math.Sin(angleBetweenChildren / 2.0));
return(legDistance);
}
private double CalculateStartAngle(DiagramNode node)
{
if (node == mRootNode)
{
return(0.0);
}
Vector parentToNode = node.Location - node.DiagramParent.Location;
parentToNode.Normalize();
Vector leftToRight = new Vector(1.0, 0.0);
double angle = Vector.AngleBetween(parentToNode, leftToRight);
if (angle < 0)
{
angle = 360 - angle;
}
if (node.DiagramChildren.Count > 1)
{
if (node.Location.Y < node.DiagramParent.Location.Y)
{
if (node.Location.X > node.DiagramParent.Location.X)
{
angle -= 180;
}
else
{
angle -= 270;
}
}
else
{
angle -= 90;
}
}
return(Math.PI * angle / 180.0);
}