public static TreeNodeGraphics CreateTree(GraphicsElement root, Core.Types.TreeBase tree)
{
TreeNodeGraphics tg = new TreeNodeGraphics(tree);
tg.ParentGraphics = root;
if (tree.GetChildrenAsTreeBase().Count() > 0)
{
foreach (TreeBase child in tree.GetChildrenAsTreeBase())
{
if (child != null)
tg.Add(CreateTree(tg, child));
}
}
return tg;
}
public void Add(TreeNodeGraphics tg)
{
_children.Add(tg);
tg._parentTreeGraphics = this;
}
public static void PreOrder(TreeNodeGraphics tg, Action<TreeNodeGraphics> action)
{
action(tg);
foreach (TreeNodeGraphics child in tg.Children)
PreOrder(child, action);
}
private void layoutNode(TreeNodeGraphics node, double top, double left)
{
// gyerekek elhelyezése (relatív pozíció)
// a csúcs elhelyezése
// node.Update();
double pad = node.TotalWidth / 2 - node.CalculatedWidth / 2;
if (node.ParentTreeGraphics != null && node.ParentTreeGraphics.NumberOfChildren == 1
&& node.ParentTreeGraphics.CalculatedWidth > node.CalculatedWidth)
{
pad = node.ParentTreeGraphics.CalculatedWidth / 2 - node.CalculatedWidth / 2;
}
Canvas.SetLeft(node, pad + left);
Canvas.SetTop(node, top);
double oldleft = left;
foreach (TreeNodeGraphics tg in node.Children)
{
layoutNode(tg, top + node.CalculatedHeight + 10, left);
left += tg.TotalWidth + 10;
}
if (node.NumberOfChildren > 0)
{
double offset = getHorizontalOffset(node);
Canvas.SetLeft(node, offset - 2);
Canvas.SetTop(node, top);
}
drawUpperLine(node);
drawHorizontalLine(node);
drawLowerLine(node);
double x,y;
if ((x = Canvas.GetLeft(node) + node.CalculatedWidth) > maxX)
maxX = x;
if ((y = Canvas.GetTop(node) + node.CalculatedHeight) > maxY)
maxY = y;
}
private double getHorizontalOffset(TreeNodeGraphics node)
{
TreeNodeGraphics firstChild = node.Children[0];
TreeNodeGraphics lastChild = node.Children[node.NumberOfChildren - 1];
double plus = 2;
double firstX = Canvas.GetLeft(firstChild) + firstChild.CalculatedWidth / 2 + plus;
double lastX = Canvas.GetLeft(lastChild) + lastChild.CalculatedWidth / 2 + plus;
double centerX = (firstX + lastX) / 2;
return centerX - node.CalculatedWidth / 2;
}
private void drawUpperLine(TreeNodeGraphics node)
{
if (node.ParentTreeGraphics != null)
{
Line upLine = new Line();
upLine.Y1 = -2;
upLine.Y2 = 2;
upLine.Stroke = Brushes.Black;
canvas.Children.Add(upLine);
upLine.SnapsToDevicePixels = false;
upLine.StrokeThickness = 1;
Canvas.SetLeft(upLine, SnapToPixel(Canvas.GetLeft(node) + node.CalculatedWidth / 2 + 2, upLine.StrokeThickness));
Canvas.SetTop(upLine, SnapToPixel(Canvas.GetTop(node), upLine.StrokeThickness));
}
}
private void drawLowerLine(TreeNodeGraphics node)
{
if (node.NumberOfChildren > 0)
{
Line downLine = new Line();
downLine.Y2 = 6;
canvas.Children.Add(downLine);
downLine.Stroke = Brushes.Black;
downLine.StrokeThickness = 1;
downLine.SnapsToDevicePixels = false;
Canvas.SetTop(downLine, SnapToPixel(Canvas.GetTop(node) + node.CalculatedHeight + 2, downLine.StrokeThickness));
Canvas.SetLeft(downLine, SnapToPixel(Canvas.GetLeft(node) + node.CalculatedWidth / 2 + 2, downLine.StrokeThickness));
}
}
private void drawHorizontalLine(TreeNodeGraphics node)
{
if (node.NumberOfChildren > 1)
{
TreeNodeGraphics firstChild = node.Children[0];
TreeNodeGraphics lastChild = node.Children[node.NumberOfChildren - 1];
// connect the two points
double firstX = Canvas.GetLeft(firstChild) + firstChild.CalculatedWidth / 2 + 2;
double lastX = Canvas.GetLeft(lastChild) + lastChild.CalculatedWidth / 2 + 2;
Line hori = new Line();
hori.X2 = lastX - firstX;
canvas.Children.Add(hori);
hori.Stroke = Brushes.Black;
hori.SnapsToDevicePixels = false;
hori.StrokeThickness = 1;
Canvas.SetLeft(hori, SnapToPixel(firstX, hori.StrokeThickness));
Canvas.SetTop(hori, SnapToPixel(Canvas.GetTop(firstChild) - 2, hori.StrokeThickness));
}
}
public void PlaceNodesOntoCanvas()
{
canvas.Children.Clear();
if (root != null)
{
root.WidthChanged -= root_WidthChanged;
root.Dispose();
}
root = CreateTree(this, tree);
root.WidthChanged += root_WidthChanged;
PreOrder(root, delegate(TreeNodeGraphics tg)
{
canvas.Children.Add(tg);
if (tg.Child is TreeGraphics)
(tg.Child as TreeGraphics).PlaceNodesOntoCanvas();
});
}
