internal static void ConstructCustomMenu(IntPtr menu, CustomMenuStructure[] customItems, out List <IntPtr> menuPtrConstructed)
{
menuPtrConstructed = new List <IntPtr>();
for (int i = 0; i < customItems.Length; i++)
{
CustomMenuStructure item = customItems[i];
if (item.IsFolder)
{
IntPtr newPopup = ShellAPI.CreatePopupMenu();
menuPtrConstructed.Add(newPopup);
ShellAPI.InsertMenu(menu, (uint)i, ShellAPI.MFT.BYPOSITION | ShellAPI.MFT.POPUP,
newPopup, item.Text);
List <IntPtr> submenuPtrConstructed;
ConstructCustomMenu(newPopup, item.Items.ToArray(), out submenuPtrConstructed);
menuPtrConstructed.AddRange(submenuPtrConstructed);
}
else
if (item.Text == "---")
{
ShellAPI.InsertMenu(menu, (uint)i, ShellAPI.MFT.BYPOSITION | ShellAPI.MFT.SEPARATOR, IntPtr.Zero, "");
}
else
{
ShellAPI.MFT extraFlag = 0;
if (item.Checked)
{
extraFlag |= ShellAPI.MFT.CHECKED;
}
ShellAPI.InsertMenu(menu, (uint)i, ShellAPI.MFT.BYPOSITION | extraFlag, new UIntPtr(ShellAPI.CMD_LAST + item.ID + 1), item.Text);
}
}
}
public MENUITEMINFO(string text)
{
this.cbSize = ShellAPI.cbMenuItemInfo;
this.dwTypeData = text;
this.cch = text.Length;
this.fMask = (ShellAPI.MIIM) 0u;
this.fType = ShellAPI.MFT.BYCOMMAND;
this.fState = ShellAPI.MFS.ENABLED;
this.wID = 0u;
this.hSubMenu = IntPtr.Zero;
this.hbmpChecked = IntPtr.Zero;
this.hbmpUnchecked = IntPtr.Zero;
this.dwItemData = IntPtr.Zero;
this.hbmpItem = IntPtr.Zero;
}
public static extern bool RemoveMenu(IntPtr hMenu, uint uPosition, ShellAPI.MFT uFlags);
public static extern bool InsertMenu(IntPtr hmenu, uint uPosition, ShellAPI.MFT uflags, uint uIDNewItem, [MarshalAs(UnmanagedType.LPTStr)] string lpNewItem);
public static extern bool AppendMenu(IntPtr hMenu, ShellAPI.MFT uFlags, uint uIDNewItem, [MarshalAs(UnmanagedType.LPTStr)] string lpNewItem);
/// <summary>
/// When the mouse goes up on an node and suspendContextMenu is true, this method will show the
/// ContextMenu for that node and after the user selects an item, it will execute that command.
/// </summary>
void FolderView_MouseUp(object sender, MouseEventArgs e)
{
if (suspendContextMenu || contextMenuVisible)
{
suspendContextMenu = false;
return;
}
TreeViewHitTestInfo hitTest = br.FolderView.HitTest(e.Location);
contextMenuVisible = true;
if (e.Button == MouseButtons.Right &&
(hitTest.Location == TreeViewHitTestLocations.Image ||
hitTest.Location == TreeViewHitTestLocations.Label ||
hitTest.Location == TreeViewHitTestLocations.StateImage))
{
#region Fields
ShellItem item = (ShellItem)hitTest.Node.Tag;
IntPtr contextMenu = IntPtr.Zero,
iContextMenuPtr = IntPtr.Zero,
iContextMenuPtr2 = IntPtr.Zero,
iContextMenuPtr3 = IntPtr.Zero;
IShellFolder parentShellFolder =
(item.ParentItem != null) ? item.ParentItem.ShellFolder : item.ShellFolder;
#endregion
#region Show / Invoke
try
{
if (ContextMenuHelper.GetIContextMenu(parentShellFolder, new IntPtr[] { item.PIDLRel.Ptr },
out iContextMenuPtr, out iContextMenu))
{
contextMenu = ShellAPI.CreatePopupMenu();
iContextMenu.QueryContextMenu(
contextMenu,
0,
ShellAPI.CMD_FIRST,
ShellAPI.CMD_LAST,
ShellAPI.CMF.EXPLORE |
ShellAPI.CMF.CANRENAME |
((Control.ModifierKeys & Keys.Shift) != 0 ? ShellAPI.CMF.EXTENDEDVERBS : 0));
string topInvoke = hitTest.Node.IsExpanded ? "Collapse" : "Expand";
ShellAPI.MFT extraFlag = (hitTest.Node.Nodes.Count > 0) ? 0 : ShellAPI.MFT.GRAYED;
ShellAPI.InsertMenu(contextMenu, 0,
ShellAPI.MFT.BYPOSITION | extraFlag,
(int)CMD_CUSTOM.ExpandCollapse, topInvoke);
ShellAPI.InsertMenu(contextMenu, 1,
ShellAPI.MFT.BYPOSITION | ShellAPI.MFT.SEPARATOR,
0, "-");
ShellAPI.SetMenuDefaultItem(
contextMenu,
0,
true);
Marshal.QueryInterface(iContextMenuPtr, ref ShellAPI.IID_IContextMenu2, out iContextMenuPtr2);
Marshal.QueryInterface(iContextMenuPtr, ref ShellAPI.IID_IContextMenu3, out iContextMenuPtr3);
try
{
iContextMenu2 =
(IContextMenu2)Marshal.GetTypedObjectForIUnknown(iContextMenuPtr2, typeof(IContextMenu2));
iContextMenu3 =
(IContextMenu3)Marshal.GetTypedObjectForIUnknown(iContextMenuPtr3, typeof(IContextMenu3));
}
catch (Exception) { }
Point ptInvoke = br.FolderView.PointToScreen(e.Location);
uint selected = ShellAPI.TrackPopupMenuEx(
contextMenu,
ShellAPI.TPM.RETURNCMD,
ptInvoke.X,
ptInvoke.Y,
this.Handle,
IntPtr.Zero);
br.OnContextMenuMouseHover(new ContextMenuMouseHoverEventArgs(string.Empty));
if (selected == (int)CMD_CUSTOM.ExpandCollapse)
{
if (hitTest.Node.IsExpanded)
{
hitTest.Node.Collapse(true);
}
else
{
hitTest.Node.Expand();
}
}
else if (selected >= ShellAPI.CMD_FIRST)
{
string command = ContextMenuHelper.GetCommandString(
iContextMenu,
selected - ShellAPI.CMD_FIRST,
true);
if (command == "rename")
{
br.FolderView.LabelEdit = true;
hitTest.Node.BeginEdit();
}
else
{
ContextMenuHelper.InvokeCommand(
iContextMenu,
selected - ShellAPI.CMD_FIRST,
(item.ParentItem != null) ?
ShellItem.GetRealPath(item.ParentItem) : ShellItem.GetRealPath(item),
ptInvoke);
}
}
}
}
#endregion
catch (Exception) { }
#region Finally
finally
{
if (iContextMenu != null)
{
Marshal.ReleaseComObject(iContextMenu);
iContextMenu = null;
}
if (iContextMenu2 != null)
{
Marshal.ReleaseComObject(iContextMenu2);
iContextMenu2 = null;
}
if (iContextMenu3 != null)
{
Marshal.ReleaseComObject(iContextMenu3);
iContextMenu3 = null;
}
if (contextMenu != null)
{
ShellAPI.DestroyMenu(contextMenu);
}
if (iContextMenuPtr != IntPtr.Zero)
{
Marshal.Release(iContextMenuPtr);
}
if (iContextMenuPtr2 != IntPtr.Zero)
{
Marshal.Release(iContextMenuPtr2);
}
if (iContextMenuPtr3 != IntPtr.Zero)
{
Marshal.Release(iContextMenuPtr3);
}
}
#endregion
}
contextMenuVisible = false;
}