//Refresh Layout
/// <summary>
/// RefreshLayout
/// Description:
/// When there are changes in content of the page like new nodes or connectors added,
/// the layout has to be refreshed to get the page’s content aligned again to give space for new contents
/// </summary>
/// ReturnType:Void
/// <param name="Null"></param>
/// <param name="e"></param>
//Refreshing the Layout
private void refreshLayout(TreeOrientation treeorientation)
{
HierarchicalTreeLayout tree = new HierarchicalTreeLayout(diagramModel, diagramView);
diagramModel.Orientation = treeorientation;
tree.RefreshLayout();
(diagramView.Page as DiagramPage).InvalidateMeasure();
(diagramView.Page as DiagramPage).InvalidateArrange();
}
//To change the Spacing properties
/// <summary>
/// HorizontalSpacing ,VerticalSpacing and SpaceBetweenSubTrees
/// Description:
/// Provide the spaces between the edges of the adjacent nodes (Siblings)[HorizontalSpacing].
/// Provide spaces between the nodes that lie at the next levels of the layout[VerticalSpacing].
/// Provide the sthe spaces between adjacent Subtrees[SpaceBetweenSubTrees].
/// Property of DiagramModel
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void Hspace_TextChanged(object sender, TextChangedEventArgs e)
{
if (this.IsLoaded)
{
TextBox box = (sender as TextBox);
HierarchicalTreeLayout htreelayout = new HierarchicalTreeLayout(diagramModel, diagramView);
if (diagramModel != null)
{
if (box.Text != string.Empty)
{
try
{
switch (box.Name)
{
case "Hspace":
diagramModel.HorizontalSpacing = double.Parse(box.Text);
htreelayout.RefreshLayout();
break;
case "Vspace":
diagramModel.VerticalSpacing = double.Parse(box.Text);
htreelayout.RefreshLayout();
break;
case "Sspace":
diagramModel.SpaceBetweenSubTrees = double.Parse(box.Text);
htreelayout.RefreshLayout();
break;
case "LeftBounds":
diagramView.LayoutBounds = new Rect(double.Parse(box.Text), diagramView.LayoutBounds.Y, diagramView.LayoutBounds.Width, diagramView.LayoutBounds.Height);
htreelayout.RefreshLayout();
break;
case "TopBounds":
diagramView.LayoutBounds = new Rect(diagramView.LayoutBounds.X, double.Parse(box.Text), diagramView.LayoutBounds.Width, diagramView.LayoutBounds.Height);
htreelayout.RefreshLayout();
break;
case "WidthBounds":
diagramView.LayoutBounds = new Rect(diagramView.LayoutBounds.X, diagramView.LayoutBounds.Y, double.Parse(box.Text), diagramView.LayoutBounds.Height);
htreelayout.RefreshLayout();
break;
case "HeightBounds":
diagramView.LayoutBounds = new Rect(diagramView.LayoutBounds.X, diagramView.LayoutBounds.Y, diagramView.LayoutBounds.Width, double.Parse(box.Text));
htreelayout.RefreshLayout();
break;
}
}
catch
{
MessageBox.Show("Invalid Input. Enter digits (0-9) only", "Invalid input", MessageBoxButton.OK, MessageBoxImage.Error);
}
}
}
}
}
/// <summary>
/// updates the Diagram completely
/// </summary>
/// <param name="advanced"></param>
public void UpdateDiagram(bool advanced = false)
{
if (advanced)
{
Model.Connections.Clear();
Model.Nodes.Clear();
CreateDiagram();
}
var layout = new HierarchicalTreeLayout(Model, View);
layout.RefreshLayout();
}
//Refreshing the Layout after adding the Node
private void AddNodeasChild(NodeContent cnt, Node n1, Node head)
{
n1.Style = this.Resources["newtemp"] as Style;
n1.Content = cnt;
n1.Width = 75;
n1.Height = 75;
n1.HorizontalContentAlignment = HorizontalAlignment.Stretch;
n1.VerticalContentAlignment = VerticalAlignment.Stretch;
if (n1.ChildCount == 0)
{
cnt.Expander = null;
}
else
{
cnt.Expander = App.Current.Resources["Plus"] as DrawingImage;
}
if (head != null)
{
if (head.ChildCount == 0)
{
if ((this.FindNameFromContentTemplate(head, "Expander") as Image) != null)
{
(this.FindNameFromContentTemplate(head, "Expander") as Image).Source = App.Current.Resources["Minus"] as DrawingImage;
}
}
}
LineConnector lc = new LineConnector();
lc.HeadNode = head;
lc.TailNode = n1;
lc.TailDecoratorShape = DecoratorShape.Arrow;
if ((this.FindNameFromContentTemplate(head, "Expander") as Image).Name == "P")
{
n1.Visibility = Visibility.Hidden;
lc.Visibility = Visibility.Hidden;
}
else
{
Show(n1);
}
diagramModel.Nodes.Add(n1);
n1.AllowSelect = false;
n1.IsSelected = false;
n1.MouseRightButtonDown += new MouseButtonEventHandler(newNode_MouseRightButtonDown);
diagramModel.Connections.Add(lc);
HierarchicalTreeLayout layout = new HierarchicalTreeLayout(diagramModel, diagramView);
layout.RefreshLayout();
}
//Menu For adding the Node
void AddMenuItem_Click(object sender, RoutedEventArgs e)
{
Node n = selectedNode;
if (n != null)
{
Node n1 = addNode("Employee", true, false);
Node n2 = addNode("Boy", true, false);
Connect(n, n1, null);
Connect(n, n2, null);
}
if ((this.FindNameFromContentTemplate(n, "Expander") as Image) != null)
{
(this.FindNameFromContentTemplate(n, "Expander") as Image).Source = App.Current.Resources["Minus"] as DrawingImage;
}
HierarchicalTreeLayout layout = new HierarchicalTreeLayout(diagramModel, diagramView);
layout.RefreshLayout();
}
private void VerticalLayout_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
if ((sender as ComboBox).SelectedIndex == 0)
{
diagramModel.LayoutVerticalAlignment = LayoutVerticalAlignment.Center;
}
else if ((sender as ComboBox).SelectedIndex == 1)
{
diagramModel.LayoutVerticalAlignment = LayoutVerticalAlignment.Top;
}
else
{
diagramModel.LayoutVerticalAlignment = LayoutVerticalAlignment.Bottom;
}
HierarchicalTreeLayout tree = new HierarchicalTreeLayout(diagramModel, diagramView);
tree.RefreshLayout();
(diagramView.Page as DiagramPage).InvalidateMeasure();
(diagramView.Page as DiagramPage).InvalidateArrange();
}