/// <summary>
/// Raises the Paint event
/// </summary>
/// <param name="e">A PaintCellEventArgs that contains the event data</param>
protected override void OnPaint(PaintCellEventArgs e)
{
base.OnPaint(e);
// don't bother if the Cell is null
if (e.Cell == null)
{
return;
}
Rectangle controlRect = this.CalcControlRect(this.LineAlignment, this.Alignment);
ControlRendererData controlData = this.GetControlRendererData(e.Cell);
if (controlData != null && controlData.Control != null)
{
controlData.Control.Size = controlRect.Size;
controlData.Control.Location = controlRect.Location;
controlData.Control.BringToFront();
if (e.Cell.WidthNotSet)
{
e.Cell.ContentWidth = controlRect.Size.Width;
}
}
}
/// <summary>
/// Gets the ControlRendererData specific data used by the Renderer from
/// the specified Cell
/// </summary>
/// <param name="cell"></param>
/// <returns></returns>
protected ControlRendererData GetControlRendererData(Cell cell)
{
object rendererData = this.GetRendererData(cell);
if (this.ControlFactory != null)
{
if (rendererData == null || !(rendererData is ControlRendererData))
{
// Never shown a control, so ask what we should do
Control control = this.ControlFactory.GetControl(cell);
if (control != null)
{
cell.Row.TableModel.Table.Controls.Add(control);
control.BringToFront();
ControlRendererData data = new ControlRendererData(control);
this.SetRendererData(cell, data);
rendererData = data;
}
}
else
{
// Already got a control, but should we swap it for another
ControlRendererData data = (ControlRendererData)rendererData;
Control oldControl = data.Control;
// This next call allows the properties of the control to be updated, or to provide
// an entirely new control
Control newControl = this.ControlFactory.UpdateControl(cell, data.Control);
if (newControl != null)
{
// We need to take off the old control and wire up the new one
cell.Row.TableModel.Table.Controls.Remove(oldControl);
cell.Row.TableModel.Table.Controls.Add(newControl);
data.Control = newControl;
newControl.BringToFront();
}
}
}
return((ControlRendererData)rendererData);
}