public int DragOver(ShellAPI.MK grfKeyState, ShellAPI.POINT pt, ref DragDropEffects pdwEffect)
{
bool reset = false;
#region Get DropItem
Point point = br.FileView.PointToClient(new Point(pt.x, pt.y));
ListViewHitTestInfo hitTest = br.FileView.HitTest(point);
if (hitTest.Item != null &&
(br.FileView.View != View.Details || hitTest.SubItem == null || hitTest.Item.Name == hitTest.SubItem.Name) &&
(hitTest.Location == ListViewHitTestLocations.Image ||
hitTest.Location == ListViewHitTestLocations.Label ||
hitTest.Location == ListViewHitTestLocations.StateImage))
{
if (!hitTest.Item.Equals(dropListItem))
{
if (dropTarget != null)
{
dropTarget.DragLeave();
}
ReleaseCom();
if (dropListItem != null)
{
dropListItem.Selected = wasSelected;
}
dropListItem = hitTest.Item;
wasSelected = dropListItem.Selected;
dropListItem.Selected = true;
ShellItem item = (ShellItem)dropListItem.Tag;
parentDropItem = item;
ShellHelper.GetIDropTarget(item, out dropTargetPtr, out dropTarget);
reset = true;
}
}
else
{
if (dropListItem != null)
{
if (dropTarget != null)
{
dropTarget.DragLeave();
}
ReleaseCom();
dropListItem.Selected = wasSelected;
dropListItem = null;
parentDropItem = br.SelectedItem;
ShellHelper.GetIDropTarget(br.SelectedItem, out dropTargetPtr, out dropTarget);
reset = true;
}
}
#endregion
if (dropTarget != null)
{
if (reset)
{
dropTarget.DragEnter(dropDataObject, grfKeyState, pt, ref pdwEffect);
}
else
{
dropTarget.DragOver(grfKeyState, pt, ref pdwEffect);
}
}
else
{
pdwEffect = DragDropEffects.None;
}
if (dropHelper != null)
{
dropHelper.DragOver(ref pt, pdwEffect);
}
return(ShellAPI.S_OK);
}
public int DragOver(ShellAPI.MK grfKeyState, ShellAPI.POINT pt, ref DragDropEffects pdwEffect)
{
bool reset = false;
#region Get DropItem
Point point = br.FolderView.PointToClient(new Point(pt.x, pt.y));
TreeViewHitTestInfo hitTest = br.FolderView.HitTest(point);
if (!TreeNode.Equals(dropNode, hitTest.Node))
{
if (dropTarget != null)
{
dropTarget.DragLeave();
}
ReleaseCom();
dropNode = hitTest.Node;
br.FolderView.SelectedNode = dropNode;
if (dropNode == null)
{
pdwEffect = DragDropEffects.None;
if (dropHelper != null)
{
dropHelper.DragOver(ref pt, pdwEffect);
}
return(ShellAPI.S_OK);
}
else
{
ShellItem item = (ShellItem)dropNode.Tag;
parentDropItem = item;
ShellHelper.GetIDropTarget(item, out dropTargetPtr, out dropTarget);
reset = true;
}
}
else if (dropNode == null)
{
if (dropTarget != null)
{
dropTarget.DragLeave();
}
ReleaseCom();
dropNode = null;
br.SelectedNode = null;
pdwEffect = DragDropEffects.None;
if (dropHelper != null)
{
dropHelper.DragOver(ref pt, pdwEffect);
}
return(ShellAPI.S_OK);
}
#endregion
if (dropTarget != null)
{
if (reset)
{
dropTarget.DragEnter(dropDataObject, grfKeyState, pt, ref pdwEffect);
}
else
{
dropTarget.DragOver(grfKeyState, pt, ref pdwEffect);
}
}
else
{
pdwEffect = DragDropEffects.None;
}
if (dropHelper != null)
{
dropHelper.DragOver(ref pt, pdwEffect);
}
return(ShellAPI.S_OK);
}