raise mouse hover

[Colin Bolton]

I am using a custom cell type implemented with the GridGenericControlCellModel.GridGenericControlCellRenderer. My control is grabbing a lot of mouse events (for reasons that are too boring to go into). BUT I would like to able to cache the most recent MouseEventArgs from the mouse move event in my control and then raise an event when the mouse hovers (caught in the WndProc method override) to the cell renderer which in turn can call RaiseMouseHover for the current cell which _should_ I think show the tooltip. As you can probably guess the tooltip doesn''t show, any ideas?? Or better ways of doing this??

Cheers

Colin

Code snippets:

In my control

void
XXX::WndProc(System::Windows::Forms::Message %p_message)
{
__super::WndProc(p_message);

if(p_message.Msg ==WM_MOUSEHOVER)
{
//raise the event...
mouseHover(this,cached_mouse_move);
}

}

void
ComboMenuStrip::OnMouseMove(System::Windows::Forms::MouseEventArgs^ e) {
cached_mouse_move=e;
}

In the cell renderer:

void
Renderer::Init()
{
xxx_control_instance->mouseHover +=gcnew ToolTipEventHandler(this,&yyy::showTooltip);
}

void
yyy::showTooltip(System::Object^ sender, System::Windows::Forms::MouseEventArgs^ event_args)
{
GridCurrentCell^ curr_cell = this->Grid->CurrentCell;
this->RaiseMouseHover(curr_cell->RowIndex,curr_cell->ColIndex,event_args);
}

[Administrator]

Is your goal to show a tooltip? If so, you can probably do this by adding a ToolTip control to your control class and setting its properties directly somewhere. Here is some C# code that does this in a WndProc override.

public class MyMonthCalendar : MonthCalendar
{
	private ToolTip tip = new ToolTip();
	protected override void WndProc(ref Message m)
	{
		base.WndProc (ref m);
		if(m.Msg == 0x200)// (WM_MOUSEMOVE
		{
			if(tip.GetToolTip(this).Length == 0)
			{
				tip.SetToolTip(this, "ToolTip");
				Console.WriteLine("set");
			}
			
		}
		else if(m.Msg == 0x2a3)// (WM_MOUSELEAVE) 
		{
			tip.RemoveAll();
			Console.WriteLine("unset");
		}
	}
}

[Colin Bolton]

Genius, thanks very much. I was so hung up on getting the cell tooltip to appear via the event that I hadn''t thought of putting a tooltip on the control!

Cheers!

Colin