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raise mouse hover

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45518 Jun 22,2006 11:53 AM Jun 23,2006 03:59 AM Windows Forms 2
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Tags: GridControl
Colin Bolton
Asked On June 22, 2006 11:53 AM

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 [Syncfusion]
Replied On June 22, 2006 02:00 PM

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
Replied On June 23, 2006 03:59 AM

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

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