/*
* DoDrop
*/
/// <summary>
/// Invokes service specific nodes merge operation.
/// </summary>
/// <exception cref="T:System.ArgumentNullException"><paramref name="selectedNodes"/> is <see langword="null"/>.</exception>
public override void DoDrop(TreeNode targetTreeNode, List<TreeNode> selectedNodes, NuGenDropPosition dropPosition)
{
if (selectedNodes == null)
{
throw new ArgumentNullException("selectedNodes");
}
if (
targetTreeNode == null
|| this.CheckSelectedContainTarget(targetTreeNode, selectedNodes)
|| !this.CheckParent(targetTreeNode, selectedNodes)
)
{
return;
}
switch (dropPosition)
{
case NuGenDropPosition.After:
case NuGenDropPosition.Before:
{
this.MoveNodes(targetTreeNode, selectedNodes, dropPosition);
break;
}
case NuGenDropPosition.Inside:
{
this.InsertNodes(targetTreeNode, selectedNodes);
break;
}
}
}
/*
* DoDrop
*/
/// <summary>
/// Invokes service specific nodes merge operation.
/// </summary>
public virtual void DoDrop(
TreeNode targetTreeNode,
List <TreeNode> selectedNodes,
NuGenDropPosition dropPosition
)
{
return;
}
protected virtual void WmNcHitTest(ref Message m)
{
if (_isDragging)
{
Point clientCursorPosition = this.PointToClient(Cursor.Position);
TreeNode targetTreeNode = this.GetNodeAt(clientCursorPosition);
Rectangle targetBounds = Rectangle.Empty;
NuGenDropPosition dropPosition = this.DragDropService.GetDropPosition(
targetTreeNode,
clientCursorPosition
);
if (dropPosition != NuGenDropPosition.Nowhere)
{
targetBounds = targetTreeNode.Bounds;
}
Point dragLineLeft = Point.Empty;
Point dragLineRight = Point.Empty;
using (Graphics g = Graphics.FromHwnd(this.Handle))
{
NuGenControlPaint.DrawReversibleLine(g, _oldDragLineLeft, _oldDragLineRight);
switch (dropPosition)
{
case NuGenDropPosition.After:
{
dragLineLeft = new Point(this.Left, targetBounds.Bottom);
dragLineRight = new Point(this.Right, targetBounds.Bottom);
NuGenControlPaint.DrawReversibleLine(g, dragLineLeft, dragLineRight);
break;
}
case NuGenDropPosition.Before:
{
dragLineLeft = new Point(this.Left, targetBounds.Top);
dragLineRight = new Point(this.Right, targetBounds.Top);
NuGenControlPaint.DrawReversibleLine(g, dragLineLeft, dragLineRight);
break;
}
}
}
_oldDragLineLeft = dragLineLeft;
_oldDragLineRight = dragLineRight;
}
base.WndProc(ref m);
}
/*
* MoveNodes
*/
/// <summary>
/// Moves selected nodes to the new location specified by the <paramref name="targetNode"/> index.
/// </summary>
/// <param name="targetNode"></param>
/// <param name="selected"></param>
/// <param name="dropPosition"></param>
/// <exception cref="T:System.ArgumentNullException">
/// <paramref name="targetNode"/> is <see langword="null"/>
/// -or-
/// <paramref name="selected"/> is <see langword="null"/>
/// </exception>
private void MoveNodes(TreeNode targetNode, List <TreeNode> selected, NuGenDropPosition dropPosition)
{
if (targetNode == null)
{
throw new ArgumentNullException("targetNode");
}
if (selected == null)
{
throw new ArgumentNullException("selected");
}
int targetIndex = 0;
if (dropPosition == NuGenDropPosition.After)
{
targetIndex = targetNode.Index + 1;
this.RemoveNodesFromParents(selected);
}
else if (dropPosition == NuGenDropPosition.Before)
{
this.RemoveNodesFromParents(selected);
targetIndex = targetNode.Index;
}
else
{
return;
}
foreach (TreeNode treeNode in selected)
{
if (targetNode.Parent != null)
{
targetNode.Parent.Nodes.Insert(targetIndex, treeNode);
}
else if (targetNode.TreeView != null)
{
targetNode.TreeView.Nodes.Insert(targetIndex, treeNode);
}
else
{
return;
}
}
}
public void GetDropPositionTest()
{
Rectangle nodeBounds = this.treeNode.Bounds;
Point cursorPosition = new Point(nodeBounds.Left, nodeBounds.Top + nodeBounds.Height / 2);
NuGenDropPosition dropPosition = this.dragService.GetDropPosition(this.treeNode, cursorPosition);
Assert.AreEqual(NuGenDropPosition.Inside, dropPosition);
cursorPosition = new Point(nodeBounds.Left, nodeBounds.Top);
dropPosition = this.dragService.GetDropPosition(this.treeNode, cursorPosition);
Assert.AreEqual(NuGenDropPosition.Before, dropPosition);
cursorPosition = new Point(nodeBounds.Left, nodeBounds.Bottom);
dropPosition = this.dragService.GetDropPosition(this.treeNode, cursorPosition);
Assert.AreEqual(NuGenDropPosition.After, dropPosition);
cursorPosition = new Point(-10, -10);
dropPosition = this.dragService.GetDropPosition(this.treeNode, cursorPosition);
Assert.AreEqual(NuGenDropPosition.Nowhere, dropPosition);
Assert.AreEqual(NuGenDropPosition.Nowhere, this.dragService.GetDropPosition(null, cursorPosition));
}
/*
* DoDrop
*/
/// <summary>
/// Invokes service specific nodes merge operation.
/// </summary>
public virtual void DoDrop(
TreeNode targetTreeNode,
IList<TreeNode> selectedNodes,
NuGenDropPosition dropPosition
)
{
return;
}
/*
* DoDrop
*/
/// <summary>
/// Invokes service specific nodes merge operation.
/// </summary>
/// <exception cref="T:System.ArgumentNullException"><paramref name="selectedNodes"/> is <see langword="null"/>.</exception>
public override void DoDrop(TreeNode targetTreeNode, IList <TreeNode> selectedNodes, NuGenDropPosition dropPosition)
{
if (selectedNodes == null)
{
throw new ArgumentNullException("selectedNodes");
}
if (
targetTreeNode == null ||
DragDropService.CheckSelectedContainTarget(targetTreeNode, selectedNodes) ||
!DragDropService.CheckParent(targetTreeNode, selectedNodes)
)
{
return;
}
switch (dropPosition)
{
case NuGenDropPosition.After:
case NuGenDropPosition.Before:
{
DragDropService.MoveNodes(targetTreeNode, selectedNodes, dropPosition);
break;
}
case NuGenDropPosition.Inside:
{
DragDropService.InsertNodes(targetTreeNode, selectedNodes);
break;
}
}
}
/*
* MoveNodes
*/
/// <summary>
/// Moves selected nodes to the new location specified by the <paramref name="targetNode"/> index.
/// </summary>
/// <param name="targetNode"></param>
/// <param name="selected"></param>
/// <param name="dropPosition"></param>
/// <exception cref="T:System.ArgumentNullException">
/// <paramref name="targetNode"/> is <see langword="null"/>
/// -or-
/// <paramref name="selected"/> is <see langword="null"/>
/// </exception>
private void MoveNodes(TreeNode targetNode, List<TreeNode> selected, NuGenDropPosition dropPosition)
{
if (targetNode == null)
{
throw new ArgumentNullException("targetNode");
}
if (selected == null)
{
throw new ArgumentNullException("selected");
}
int targetIndex = 0;
if (dropPosition == NuGenDropPosition.After)
{
targetIndex = targetNode.Index + 1;
this.RemoveNodesFromParents(selected);
}
else if (dropPosition == NuGenDropPosition.Before)
{
this.RemoveNodesFromParents(selected);
targetIndex = targetNode.Index;
}
else
{
return;
}
foreach (TreeNode treeNode in selected)
{
if (targetNode.Parent != null)
{
targetNode.Parent.Nodes.Insert(targetIndex, treeNode);
}
else if (targetNode.TreeView != null)
{
targetNode.TreeView.Nodes.Insert(targetIndex, treeNode);
}
else
{
return;
}
}
}
/*
* DoDrop
*/
/// <summary>
/// Invokes service specific nodes merge operation.
/// </summary>
/// <exception cref="T:System.ArgumentNullException"><paramref name="selectedNodes"/> is <see langword="null"/>.</exception>
public override void DoDrop(NuGenTreeNode targetTreeNode, List <NuGenTreeNode> selectedNodes, NuGenDropPosition dropPosition)
{
if (selectedNodes == null)
{
throw new ArgumentNullException("selectedNodes");
}
if (
targetTreeNode == null ||
this.CheckSelectedContainTarget(targetTreeNode, selectedNodes) ||
!this.CheckParent(targetTreeNode, selectedNodes)
)
{
return;
}
switch (dropPosition)
{
case NuGenDropPosition.After:
case NuGenDropPosition.Before:
{
this.MoveNodes(targetTreeNode, selectedNodes, dropPosition);
break;
}
case NuGenDropPosition.Inside:
{
this.InsertNodes(targetTreeNode, this.RetrieveInsertable(selectedNodes));
break;
}
}
}
