private void updateDragTargetPosition(CTreeNode nodeBefore, CTreeNode nodeAfter)
{
if (DragTargetPosition.NodeBefore != nodeBefore || DragTargetPosition.NodeAfter != nodeAfter)
{
DragTargetPosition = new DragTargetPositionClass(null, nodeBefore, nodeAfter);
if (nodeBefore == null)
{
if (DrawStyle == CTreeViewDrawStyle.VerticalDiagram)
{
dragDropLinePoint1 = new Point(nodeAfter.BoundsSubtree.X - 2, nodeAfter.BoundsSubtree.Y);
dragDropLinePoint2 = new Point(nodeAfter.BoundsSubtree.X - 2, nodeAfter.BoundsSubtree.Bottom);
}
else
{
dragDropLinePoint1 = new Point(nodeAfter.BoundsSubtree.X, nodeAfter.BoundsSubtree.Y - 2);
dragDropLinePoint2 = new Point(nodeAfter.BoundsSubtree.Right, nodeAfter.BoundsSubtree.Y - 2);
}
}
else if (nodeAfter == null)
{
if (DrawStyle == CTreeViewDrawStyle.VerticalDiagram)
{
dragDropLinePoint1 = new Point(nodeBefore.BoundsSubtree.Right + 2, nodeBefore.BoundsSubtree.Y);
dragDropLinePoint2 = new Point(nodeBefore.BoundsSubtree.Right + 2, nodeBefore.BoundsSubtree.Bottom);
}
else
{
dragDropLinePoint1 = new Point(nodeBefore.BoundsSubtree.X, nodeBefore.BoundsSubtree.Bottom + 2);
dragDropLinePoint2 = new Point(nodeBefore.BoundsSubtree.Right, nodeBefore.BoundsSubtree.Bottom + 2);
}
}
else
{
if (DrawStyle == CTreeViewDrawStyle.VerticalDiagram)
{
int y1 = nodeBefore.BoundsSubtree.Y;
int y2 = Math.Max(nodeBefore.BoundsSubtree.Bottom, nodeAfter.BoundsSubtree.Bottom);
int x = nodeBefore.BoundsSubtree.Right + IndentWidth / 2;
dragDropLinePoint1 = new Point(x, y1);
dragDropLinePoint2 = new Point(x, y2);
}
else
{
int x1 = nodeBefore.BoundsSubtree.X;
int x2 = Math.Max(nodeBefore.BoundsSubtree.Right, nodeAfter.BoundsSubtree.Right);
int y = nodeBefore.BoundsSubtree.Bottom + IndentWidth / 2;
dragDropLinePoint1 = new Point(x1, y);
dragDropLinePoint2 = new Point(x2, y);
}
}
dragDropRectangle = Rectangle.Empty;
Refresh();
}
}
private void updateDragTargetPosition()
{
if (DragTargetPosition.NodeDirect != null || DragTargetPosition.NodeBefore != null || DragTargetPosition.NodeAfter != null)
{
DragTargetPosition = new DragTargetPositionClass(null, null, null);
dragDropLinePoint1 = Point.Empty;
dragDropLinePoint2 = Point.Empty;
dragDropRectangle = Rectangle.Empty;
Refresh();
}
}
private void updateDragTargetPosition(CTreeNode node)
{
if (DragTargetPosition.NodeDirect != node)
{
DragTargetPosition = new DragTargetPositionClass(node, null, null);
dragDropRectangle = node.Bounds;
dragDropRectangle.Inflate(2, 2);
dragDropLinePoint1 = Point.Empty;
dragDropLinePoint2 = Point.Empty;
Refresh();
}
}
