protected override Size MeasureOverride(Size availableSize)
{
if (Children.Count == 0)
{
return(new Size(100, 20));
}
Size szFinal = new Size(0, 0);
string strRoot = Root;
TreeCanvasNode tnRoot = this.FindName(strRoot) as TreeCanvasNode;
foreach (UIElement uiel in InternalChildren)
{
uiel.Measure(availableSize);
Size szThis = uiel.DesiredSize;
if (szThis.Width > szFinal.Width || szThis.Height > szFinal.Height)
{
szFinal = new Size(
Math.Max(szThis.Width, szFinal.Width),
Math.Max(szThis.Height, szFinal.Height));
}
}
if (tnRoot != null)
{
SetParents(tnRoot);
_ltd = new LayeredTreeDraw(tnRoot, HorizontalBuffer, HorizontalBufferSubtree, VerticalBuffer, VerticalJustification.top);
_ltd.LayoutTree();
szFinal = new Size(_ltd.PxOverallWidth, _ltd.PxOverallHeight);
}
return(szFinal);
}
/// <summary>
/// Refresh tree control
/// </summary>
public void RefreshTree()
{
//Auto enable scroll for new content size
_ltd = new LayeredTreeDraw(m_RootNode, 17.5, 17.5, 17.5, VerticalJustification.top);
_ltd.LayoutTree();
this.AutoScrollMinSize = new Size((int)_ltd.PxOverallWidth + this.Margin.Left + this.Margin.Right, (int)_ltd.PxOverallHeight + this.Margin.Top + this.Margin.Bottom);
Invalidate();
}
static public void CollapsePropertyChange(DependencyObject o, DependencyPropertyChangedEventArgs e)
{
TreeCanvasNode tn = o as TreeCanvasNode;
if (tn != null && tn.Collapsible)
{
bool fCollapsed = ((bool)e.NewValue);
foreach (TreeCanvasNode tnCur in LayeredTreeDraw.VisibleDescendants <TreeCanvasNode>(tn))
{
tnCur.Visibility = fCollapsed ? Visibility.Hidden : Visibility.Visible;
}
}
}
/// <summary>
/// Prepare for Tree node draw.
/// </summary>
/// <param name="gpRoot"></param>
/// <param name="funNodeValue">delegate for callback for retrieve GPNode string representation</param>
public void DrawTreeExpression(Node gpRoot, NodeValue funNodeValue, IParameters param = null, NodeBackground funNodeBackground = null)
{
Clear();
parameters = param;
//define callbacks for
_funNodeValueCallback = funNodeValue;
_funNodeBackgroundCallback = funNodeBackground;
//Collection holds tree nodes
Queue <Node> dataTree = new Queue <Node>();
Queue <TreeNodeDrawer> ctrls = new Queue <TreeNodeDrawer>();
//current node
Node node = null;
TreeNodeDrawer treeCtrl = null;
treeCtrl = AddNode(gpRoot.Value, gpRoot.marked, null);
ctrls.Enqueue(treeCtrl);
dataTree.Enqueue(gpRoot);
while (dataTree.Count > 0)
{
//get next node
node = dataTree.Dequeue();
treeCtrl = ctrls.Dequeue();
if (node.Children != null)
{
for (int i = 0; i < node.Children.Length; i++)
{
var tn = AddNode(node.Children[i].Value, node.Children[i].marked, treeCtrl);
dataTree.Enqueue(node.Children[i]);
ctrls.Enqueue(tn);
}
}
}
_ltd = new LayeredTreeDraw(m_RootNode, 17.5, 17.5, 17.5, VerticalJustification.top);
_ltd.LayoutTree();
//Auto enable scroll for new content size
this.AutoScrollMinSize = new Size((int)_ltd.PxOverallWidth + this.Margin.Left + this.Margin.Right, (int)_ltd.PxOverallHeight + this.Margin.Top + this.Margin.Bottom);
Invalidate();
}
protected override Size MeasureOverride(Size availableSize)
{
if (Children.Count == 0)
{
return new Size(100, 20);
}
Size szFinal = new Size(0, 0);
string strRoot = Root;
TreeNode tnRoot = this.FindName(strRoot) as TreeNode;
foreach (UIElement uiel in InternalChildren)
{
uiel.Measure(availableSize);
Size szThis = uiel.DesiredSize;
if (szThis.Width > szFinal.Width || szThis.Height > szFinal.Height)
{
szFinal = new Size(
Math.Max(szThis.Width, szFinal.Width),
Math.Max(szThis.Height, szFinal.Height));
}
}
if (tnRoot != null)
{
SetParents(tnRoot);
_ltd = new LayeredTreeDraw(tnRoot, HorizontalBuffer, HorizontalBufferSubtree, VerticalBuffer, VerticalJustification.top);
_ltd.LayoutTree();
szFinal = new Size(_ltd.PxOverallWidth, _ltd.PxOverallHeight);
}
return szFinal;
}
