/// <summary>
/// Initializes a new instance of the CTreeNode class with the specified name and control.
/// </summary>
/// <param name="name"></param>
/// <param name="control"></param>
public CTreeNode(string name, Control control)
{
Nodes = new CTreeNodeCollection(this);
Level = 0;
Visible = true;
IsExpanded = true;
Name = name;
Control = control;
}
/// <summary>
/// Initializes a new instance of the CTreeView class.
/// </summary>
public CTreeView()
: base()
{
suspendUpdateCount = 0;
//InitializeComponent();
BeginUpdate();
Nodes = new CTreeNodeCollection(this);
PathSeparator = @"\";
//AutoScroll = true;
//AllowDrop = true;
ShowPlusMinus = true;
ShowLines = true;
ShowRootLines = true;
_selectedNodes = new List <CTreeNode>();
MinimizeCollapsed = true;
SelectionMode = CTreeViewSelectionMode.Multi;
DragAndDropMode = CTreeViewDragAndDropMode.ReplaceReorder;
IndentDepth = 30;
IndentWidth = 10;
selectionPen = new Pen(Color.Black, 1.0F);
selectionPen.DashStyle = System.Drawing.Drawing2D.DashStyle.Dot;
selectionBrush = new SolidBrush(SystemColors.Highlight);
_LinesPen = new Pen(Color.Black, 1.0F);
_LinesPen.DashStyle = System.Drawing.Drawing2D.DashStyle.Dot;
Bitmap imagePlus = new Bitmap(Assembly.GetExecutingAssembly().GetManifestResourceStream("ControlTreeView.Resources.plus.bmp"));
Bitmap imageMinus = new Bitmap(Assembly.GetExecutingAssembly().GetManifestResourceStream("ControlTreeView.Resources.minus.bmp"));
PlusMinus = new CTreeViewPlusMinus(imagePlus, imageMinus);
scrollTimer = new Timer();
scrollTimer.Tick += new EventHandler(scrollTimer_Tick);
scrollTimer.Interval = 1;
dragDropLinePen = new Pen(Color.Black, 2.0F);
GraphicsPath path = new GraphicsPath();
path.AddLines(new Point[] { new Point(0, 0), new Point(1, 1), new Point(-1, 1), new Point(0, 0) });
CustomLineCap cap = new CustomLineCap(null, path);
cap.WidthScale = 1.0f;
dragDropLinePen.CustomStartCap = cap;
dragDropLinePen.CustomEndCap = cap;
this.DoubleBuffered = true;
//this.ResizeRedraw = true;
//this.AutoScrollMinSize = new Size(0, 0);
EndUpdate();
}
/// <summary>
/// Sets the drag destination nodes according to specified cursor position.
/// </summary>
/// <param name="dragPosition">The position of mouse cursor during drag.</param>
internal void SetDragTargetPosition(Point dragPosition)
{
CTreeNode destinationNode = null;
CTreeNodeCollection destinationCollection = Nodes;
Nodes.TraverseNodes(node => node.Visible && node.BoundsSubtree.Contains(dragPosition), node =>
{
destinationNode = node;
destinationCollection = node.Nodes;
});
if (destinationNode != null && destinationNode.Bounds.Contains(dragPosition)) //Drag position within node
{
//Find drag position within node
int delta, coordinate, firstBound, secondBound;
if (DrawStyle == CTreeViewDrawStyle.VerticalDiagram)
{
delta = destinationNode.Bounds.Width / 4;
coordinate = dragPosition.X;
firstBound = destinationNode.Bounds.Left;
secondBound = destinationNode.Bounds.Right;
}
else
{
delta = destinationNode.Bounds.Height / 4;
coordinate = dragPosition.Y;
firstBound = destinationNode.Bounds.Top;
secondBound = destinationNode.Bounds.Bottom;
}
if (coordinate >= firstBound + delta && coordinate <= secondBound - delta)
{
updateDragTargetPosition(destinationNode);
return;
}
else if (coordinate < firstBound + delta) //before
{
updateDragTargetPosition(destinationNode.PrevNode, destinationNode);
return;
}
else if (coordinate > secondBound - delta) //after
{
updateDragTargetPosition(destinationNode, destinationNode.NextNode);
return;
}
}
else //Drag position out of the nodes
{
//Check drag position between two nodes
CTreeNode upperNode = null, lowerNode = null;
bool isBetween = false;
for (int count = 0; count <= destinationCollection.Count - 2; count++)
{
upperNode = destinationCollection[count];
lowerNode = destinationCollection[count + 1];
Point betweenLocation = Point.Empty;
Size betweenSize = Size.Empty;
if (DrawStyle == CTreeViewDrawStyle.VerticalDiagram)
{
betweenLocation = new Point(upperNode.BoundsSubtree.Right, upperNode.BoundsSubtree.Top);
betweenSize = new Size(lowerNode.BoundsSubtree.Left - upperNode.BoundsSubtree.Right, Math.Max(upperNode.BoundsSubtree.Height, lowerNode.BoundsSubtree.Height));
}
else
{
betweenLocation = new Point(upperNode.BoundsSubtree.Left, upperNode.BoundsSubtree.Bottom);
betweenSize = new Size(Math.Max(upperNode.BoundsSubtree.Width, lowerNode.BoundsSubtree.Width), lowerNode.BoundsSubtree.Top - upperNode.BoundsSubtree.Bottom);
}
Rectangle betweenRectangle = new Rectangle(betweenLocation, betweenSize);
if (betweenRectangle.Contains(dragPosition))
{
isBetween = true;
break;
}
}
if (isBetween) //Drag position between two nodes
{
updateDragTargetPosition(upperNode, lowerNode);
return;
}
else if (destinationNode != null)
{
Rectangle ownerBounds = destinationNode.Bounds;
bool isAbove, isBelow;
if (DrawStyle == CTreeViewDrawStyle.VerticalDiagram)
{
isAbove = (dragPosition.X <= ownerBounds.Left);
isBelow = (dragPosition.X >= ownerBounds.Right);
}
else
{
isAbove = (dragPosition.Y <= ownerBounds.Top);
isBelow = (dragPosition.Y >= ownerBounds.Bottom);
}
if (isAbove) //before
{
updateDragTargetPosition(destinationNode.PrevNode, destinationNode);
return;
}
else if (isBelow) //after
{
updateDragTargetPosition(destinationNode, destinationNode.NextNode);
return;
}
}
}
updateDragTargetPosition();
}