/// <summary>
/// Append an item to it's parent and update the layout
/// </summary>
/// <param name="grid"></param>
/// <param name="item"></param>
public void AppendItemToGrid(Grid grid, TreeGridItem item)
{
RowDefinition row = new RowDefinition();
grid.RowDefinitions.Add(row);
grid.Children.Add(item);
Grid.SetColumn(item, 0);
Grid.SetRow(item, grid.RowDefinitions.Count - 1);
item.HorizontalAlignment = HorizontalAlignment.Left;
item.VerticalAlignment = VerticalAlignment.Top;
TreeGridItem parent = GetDisplay(item.Model.Parent);
if (parent != null)
{
Brush stroke = new SolidColorBrush(Color.FromArgb((byte)100, (byte)0, (byte)0, (byte)0.5));
TreeGridLine line = new TreeGridLine()
{
Line1 = new Line() { Stroke = stroke, StrokeThickness = 2 },
Line2 = new Line() { Stroke = stroke, StrokeThickness = 2 },
Line3 = new Line() { Stroke = stroke, StrokeThickness = 2 },
Start = parent,
End = item
};
UnderlayCanvas.Children.Add(line.Line1);
UnderlayCanvas.Children.Add(line.Line2);
UnderlayCanvas.Children.Add(line.Line3);
_lines.Add(line);
}
UpdateDimensions(item, true);
row.Height = new GridLength(item.Height);
}
private void RemoveFromChildCanvases(BetTreeNodeModel node, TreeGridItem parentDisplay)
{
TreeGridItem nodeDisplay = _items.Find(x => x.DataContext == node);
foreach (BetTreeNodeModel child in node.Children)
RemoveFromChildCanvases(child, nodeDisplay);
TreeGridStart start = GetGrid(parentDisplay, null);
if (start != null)
RemoveItem(start.MainGrid, nodeDisplay);
}
private void UpdateGridDimensions(BetTreeNodeModel node, TreeGridItem itemDisplay, TreeGridItem parentDisplay)
{
TreeGridStart grid = GetGrid(parentDisplay, StartGrid);
double height = 0, width = 0;
for (int i = 0; i < grid.MainGrid.Children.Count; i++)
{
TreeGridItem child = grid.MainGrid.Children[i] as TreeGridItem;
if (child.Visibility == Visibility.Visible)
{
if (child.Width > width) width = child.Width;
height += child.Height;
}
if (child == itemDisplay)
{
grid.MainGrid.RowDefinitions[i].Height = new GridLength(child.Height);
}
}
grid.MainGrid.ColumnDefinitions[0].Width = new GridLength(width);
grid.Width = width;
grid.Height = height;
}
protected bool RemoveItem(Grid parent, TreeGridItem child)
{
bool found = false;
for (int i = 0; i < parent.Children.Count; i++)
{
if (parent.Children[i] == child)
{
parent.Children.RemoveAt(i);
parent.RowDefinitions.RemoveAt(i);
found = true;
if (i < parent.Children.Count)
Grid.SetRow(parent.Children[i], i);
}
else if (found)
{
Grid.SetRow(parent.Children[i], i);
}
}
List<TreeGridLine> lines = _lines.Where(x => x.Start == child || x.End == child).ToList();
foreach (TreeGridLine line in lines)
{
UnderlayCanvas.Children.Remove(line.Line1);
UnderlayCanvas.Children.Remove(line.Line2);
UnderlayCanvas.Children.Remove(line.Line3);
_lines.Remove(line);
}
return found;
}
protected void RootItemLayoutUpdated(TreeGridItem item)
{
BetTreeNodeModel node = item.DataContext as BetTreeNodeModel;
TreeGridItem parentDisplay = _items.Find(x => x.DataContext == node.Parent);
UpdateGridDimensions(node, item, parentDisplay);
if (parentDisplay != null)
{
UpdateDimensions(parentDisplay, true);
}
UpdateCanvas(item.Model.Snapshot.Round);
}
protected double GetGridStartTop(TreeGridItem item)
{
Canvas parent = _canvases[item.Model.Snapshot.Round];
Point relativeLocation = item.TranslatePoint(new Point(0, 0), parent);
return relativeLocation.Y;
}
/// <summary>
///
/// </summary>
/// <param name="node"></param>
/// <param name="parentDisplay"></param>
/// <returns></returns>
protected TreeGridStart GetNewGridStart(BetTreeNodeModel node, TreeGridItem parentDisplay)
{
TreeGridStart start = new TreeGridStart();
start.LinkedItem = parentDisplay;
start.LayoutUpdated += this.RefreshCanvas;
Canvas canvas = _canvases[node.Snapshot.Round];
canvas.Children.Add(start);
_grids[parentDisplay] = start;
return start;
}
protected TreeGridStart GetGrid(TreeGridItem item, TreeGridStart defaultGrid)
{
if (item != null && _grids.ContainsKey(item))
return _grids[item];
else
return defaultGrid;
}
/// <summary>
/// Adds a node to the child grid of its parent
/// </summary>
/// <param name="node">The node to be added</param>
/// <param name="parentDisplay">The parent grid to which the node is added</param>
protected void AddStandardNode(BetTreeNodeModel node, TreeGridItem parentDisplay)
{
Grid parentGrid = parentDisplay.Children;
TreeGridItem item = GetNewItem(node);
AppendItemToGrid(parentGrid, item);
}
/// <summary>
/// Adds a node to the root of a round section
/// </summary>
/// <param name="node">The node to be added to the root</param>
/// <param name="parentDisplay">The node parent from the previous round, or null of this is the first round</param>
protected void AddRootNode(BetTreeNodeModel node, TreeGridItem parentDisplay)
{
TreeGridStart start = (parentDisplay == null) ? StartGrid : GetGrid(parentDisplay, null);
if (start == null)
{
start = GetNewGridStart(node, parentDisplay);
}
TreeGridItem item = GetNewRootItem(node);
AppendItemToGrid(start.MainGrid, item);
UpdateGridDimensions(node, item, parentDisplay);
UpdateCanvas(node.Snapshot.Round);
}
/// <summary>
/// Update the dimensions of a single grid item
/// </summary>
/// <param name="item">The item to be updated</param>
/// <param name="expanded">Whether or not the item is expanded</param>
public void UpdateDimensions(TreeGridItem item, bool expanded)
{
double childGridWidth = 0, childGridHeight = 0;
for (int i = 0; expanded && i < item.Model.Children.Count; i++)
{
TreeGridItem child = GetDisplay(item.Model.Children[i]);
if (child != null)
{
if (child.Visibility != Visibility.Visible) continue;
if (child.Width > childGridWidth && child.Model.Snapshot.Round == item.Model.Snapshot.Round)
childGridWidth = child.Width;
if (i < item.Children.RowDefinitions.Count)
item.Children.RowDefinitions[i].Height = new GridLength(child.Height);
childGridHeight += child.Height;
}
}
item.FixLayout(childGridWidth, childGridHeight);
}
/// <summary>
/// Get a new round root item and add the appropriate event handlers
/// </summary>
/// <param name="node">The node model from which the visual component should be derived</param>
/// <returns>Visual representation of a node</returns>
public TreeGridItem GetNewRootItem(BetTreeNodeModel node)
{
TreeGridItem item = new TreeGridItem();
item.DoFixLayout += this.UpdateDimensions;
item.ItemLayoutUpdated += this.RootItemLayoutUpdated;
_items.Add(item);
item.LayoutUpdated += this.RefreshCanvas;
item.DataContext = node;
node.ExpandCollapse += DoExpandCollapse;
return item;
}
