private bool WmRButtonDown(ref Message m)
{
if (!ContainsFocus)
{
Focus();
}
Native.TV_HITTESTINFO tvhip = new Native.TV_HITTESTINFO();
tvhip.pt_x = (int)(short)m.LParam;
tvhip.pt_y = ((int)m.LParam >> 16);
IntPtr handlenode = Native.SendMessage(this.Handle, Native.TVM_HITTEST, 0, tvhip);
OnMouseDown(new MouseEventArgs(MouseButtons.Right, 1, (int)(short)m.LParam, (int)m.LParam >> 16, 0));
if ((tvhip.flags & Native.TVHT_ONITEM) != 0)
{
TreeNode node = TreeNode.FromHandle(this, tvhip.hItem);
if (this.allowEmptySelection && !IsSelectedState(node))
{
ExtendSelection(node, false, false, TreeViewAction.ByMouse);
}
}
// show context menu
Native.SendMessage(Handle, (int)Native.Msg.WM_CONTEXTMENU, (int)Handle, (IntPtr)Native.GetMessagePos());
m.Result = (IntPtr)1;
return(true);
}
private bool WmLButtonDown(ref Message m)
{
if (!ContainsFocus)
{
Focus();
}
Native.TV_HITTESTINFO tvhip = new Native.TV_HITTESTINFO();
tvhip.pt_x = (int)(short)m.LParam;
tvhip.pt_y = ((int)m.LParam >> 16);
IntPtr handlenode = Native.SendMessage(this.Handle, Native.TVM_HITTEST, 0, tvhip);
int keys = (int)m.WParam;
if ((tvhip.flags & Native.TVHT_ONITEM) != 0)
{
TreeNode node = null;
if (handlenode == IntPtr.Zero)
{
Debug.Assert(false);
return(false);
}
node = TreeNode.FromHandle(this, handlenode);
OnMouseDown(new MouseEventArgs(MouseButtons.Left, 1, (int)(short)m.LParam, (int)m.LParam >> 16, 0));
ExtendSelection(node, (keys & Native.MK_SHIFT) != 0, (keys & Native.MK_CONTROL) != 0, TreeViewAction.ByMouse);
}
else if ((tvhip.flags & Native.TVHT_ONITEMBUTTON) != 0)
{ // collapse/expand
// use default handler
return(false);
}
else
{
if (this.allowEmptySelection)
{
ExtendSelection(null as TreeNode, (keys & Native.MK_SHIFT) != 0, (keys & Native.MK_CONTROL) != 0, TreeViewAction.ByMouse);
}
return(false);
}
return(true);
}