public int DragDrop(IntPtr pDataObj, NativeShellAPI.MK grfKeyState, NativeShellAPI.POINT pt, ref DragDropEffects pdwEffect)
{
OnDrop(new DropEventArgs(mouseButtons, br.FileView));
if (!((mouseButtons & NativeShellAPI.MK.RBUTTON) != 0 ||
grfKeyState == NativeShellAPI.MK.CONTROL ||
grfKeyState == NativeShellAPI.MK.ALT ||
grfKeyState == (NativeShellAPI.MK.CONTROL | NativeShellAPI.MK.SHIFT)) && ShellItem.Equals(parentDragItem, parentDropItem))
{
ResetDrop();
ReleaseCom();
pdwEffect = DragDropEffects.None;
if (dropHelper != null)
dropHelper.Drop(pDataObj, ref pt, pdwEffect);
return NativeShellAPI.S_OK;
}
ResetDrop();
if (dropTarget != null)
{
dropTarget.DragDrop(pDataObj, grfKeyState, pt, ref pdwEffect);
ReleaseCom();
dropDataObject = IntPtr.Zero;
}
if (dropHelper != null)
dropHelper.Drop(pDataObj, ref pt, pdwEffect);
return NativeShellAPI.S_OK;
}
public DropEventArgs(NativeShellAPI.MK mouseButtons, Control dragStartControl)
{
this.mouseButtons = mouseButtons;
this.dragStartControl = dragStartControl;
}
public int DragEnter(IntPtr pDataObj, NativeShellAPI.MK grfKeyState, NativeShellAPI.POINT pt, ref DragDropEffects pdwEffect)
{
mouseButtons = grfKeyState;
startEffects = pdwEffect;
br.FileView.Focus();
br.SelectionChange = false;
ReleaseCom();
dropDataObject = pDataObj;
#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))
{
dropListItem = hitTest.Item;
wasSelected = dropListItem.Selected;
dropListItem.Selected = true;
ShellItem item = (ShellItem)dropListItem.Tag;
parentDropItem = item;
ShellHelper.GetIDropTarget(item, out dropTargetPtr, out dropTarget);
}
else
{
dropListItem = null;
parentDropItem = br.CurrentDirectory;
ShellHelper.GetIDropTarget(br.CurrentDirectory, out dropTargetPtr, out dropTarget);
}
#endregion
if (dropTarget != null)
dropTarget.DragEnter(pDataObj, grfKeyState, pt, ref pdwEffect);
if (dropHelper != null)
dropHelper.DragEnter(br.Handle, pDataObj, ref pt, pdwEffect);
return NativeShellAPI.S_OK;
}
public int DragOver(NativeShellAPI.MK grfKeyState, NativeShellAPI.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.CurrentDirectory;
ShellHelper.GetIDropTarget(br.CurrentDirectory, 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 NativeShellAPI.S_OK;
}
public int DragOver(NativeShellAPI.MK grfKeyState, NativeShellAPI.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 NativeShellAPI.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.CurrentDirectoryNode = null;
pdwEffect = DragDropEffects.None;
if (dropHelper != null)
dropHelper.DragOver(ref pt, pdwEffect);
return NativeShellAPI.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 NativeShellAPI.S_OK;
}
public int DragEnter(IntPtr pDataObj, NativeShellAPI.MK grfKeyState, NativeShellAPI.POINT pt, ref DragDropEffects pdwEffect)
{
mouseButtons = grfKeyState;
br.FolderView.Focus();
br.SelectionChange = false;
lastSelectedNode = br.FolderView.SelectedNode;
ReleaseCom();
dropDataObject = pDataObj;
#region Get DropItem
Point point = br.FolderView.PointToClient(new Point(pt.x, pt.y));
TreeViewHitTestInfo hitTest = br.FolderView.HitTest(point);
dropNode = hitTest.Node;
br.FolderView.SelectedNode = dropNode;
if (dropNode != null)
{
ShellItem item = (ShellItem)dropNode.Tag;
parentDropItem = item;
if (ShellHelper.GetIDropTarget(item, out dropTargetPtr, out dropTarget))
{
dropTarget.DragEnter(pDataObj, grfKeyState, pt, ref pdwEffect);
}
}
#endregion
if (dropHelper != null)
dropHelper.DragEnter(br.Handle, pDataObj, ref pt, pdwEffect);
return NativeShellAPI.S_OK;
}
public static extern bool SetMenuItemInfo(
IntPtr hMenu,
uint uItem,
bool fByPos,
ref NativeShellAPI.MENUITEMINFO lpmii);
public static DateTime FileTimeToDateTime(NativeShellAPI.FILETIME fileTime)
{
long ticks = (((long)fileTime.dwHighDateTime) << 32) + (long)fileTime.dwLowDateTime;
return DateTime.FromFileTimeUtc(ticks);
}
public int QueryContinueDrag(bool fEscapePressed, NativeShellAPI.MK grfKeyState)
{
if (fEscapePressed)
return NativeShellAPI.DRAGDROP_S_CANCEL;
else
{
if ((startButton & MouseButtons.Left) != 0 && (grfKeyState & NativeShellAPI.MK.LBUTTON) == 0)
return NativeShellAPI.DRAGDROP_S_DROP;
else if ((startButton & MouseButtons.Right) != 0 && (grfKeyState & NativeShellAPI.MK.RBUTTON) == 0)
return NativeShellAPI.DRAGDROP_S_DROP;
else
return NativeShellAPI.S_OK;
}
}
