/// <summary>
/// Discover the preferred size of the element.
/// </summary>
/// <param name="context">Layout context.</param>
public override Size GetPreferredSize(ViewLayoutContext context)
{
Debug.Assert(context != null);
// Validate incoming reference
if (context == null)
{
throw new ArgumentNullException("context");
}
// During disposal the view control will not longer exist
if (_viewControl != null)
{
// Ensure the control has the correct parent
UpdateParent(context.Control);
// Ensure context has the correct control
using (CorrectContextControl ccc = new CorrectContextControl(context, _viewControl))
{
// Ask the view for its preferred size
if (_viewChild != null)
{
return(_viewChild.GetPreferredSize(context));
}
}
}
return(Size.Empty);
}
/// <summary>
/// Perform a layout of the elements.
/// </summary>
/// <param name="context">Layout context.</param>
public override void Layout(ViewLayoutContext context)
{
Debug.Assert(context != null);
// Validate incoming reference
if (context == null)
{
throw new ArgumentNullException("context");
}
// During disposal the view control will not longer exist
if (_viewControl != null)
{
// Ensure context has the correct control
using (CorrectContextControl ccc = new CorrectContextControl(context, _viewControl))
{
// We take on all the available display area
ClientRectangle = context.DisplayRectangle;
// Are we allowed to layout child controls?
if (!context.ViewManager.DoNotLayoutControls)
{
// Do we have a control to position?
if (_viewControl != null)
{
// Size and position the child control
_viewControl.SetBounds(ClientLocation.X, ClientLocation.Y, ClientWidth, ClientHeight);
// Ensure the visible/enabled states are up to date
_viewControl.Visible = Visible;
_viewControl.Enabled = Enabled;
// A layout means something might have changed, so better redraw it
_viewControl.Invalidate();
}
}
// Adjust the view location to be at the top left of the child control
context.DisplayRectangle = new Rectangle(LayoutOffset, ClientSize);
// Do we have a child view to layout?
if (_viewChild != null)
{
// Layout the child view
_viewChild.Layout(context);
}
// Put back the original display value now we have finished
context.DisplayRectangle = ClientRectangle;
}
}
}