//-----------------------------------------------------------------------------
// main application
//-----------------------------------------------------------------------------
void CVsVGuiWindow::PaintWindow()
{
	if ( m_nCurrentTick == m_nLastRenderedTick || !g_pVGui->IsRunning() )
	{
		ValidateRect( m_hWnd, NULL );
		return;
	}

	m_nCurrentTick = m_nLastRenderedTick;

	vgui::VPANEL root = g_pVGuiSurface->GetEmbeddedPanel();
	g_pVGuiSurface->Invalidate( root );

	RECT windowRect;
	CMatRenderContextPtr pRenderContext( g_pMaterialSystem );
	::GetClientRect( m_hWnd, &windowRect );
	g_pMaterialSystem->SetView( m_hWnd );
	pRenderContext->Viewport( 0, 0, windowRect.right, windowRect.bottom );

	float flStartTime = Plat_FloatTime();

	pRenderContext->ClearColor4ub( 76, 88, 68, 255 ); 
	pRenderContext->ClearBuffers( true, true );

	g_pMaterialSystem->BeginFrame( 0 );

	// draw from the main panel down
	if ( m_hMainPanel.Get() )
	{
		int w, h;
		m_hMainPanel->GetSize( w, h );

		if ( w != windowRect.right || h != windowRect.bottom )
		{
			m_hMainPanel->SetBounds( 0, 0, windowRect.right, windowRect.bottom );
			m_hMainPanel->Repaint();
		}

		g_pVGuiSurface->RestrictPaintToSinglePanel( m_hMainPanel->GetVPanel() );
		g_pVGuiSurface->PaintTraverseEx( root, true );
		g_pVGuiSurface->RestrictPaintToSinglePanel( 0 );
	}

	g_pMaterialSystem->EndFrame();
	g_pMaterialSystem->SwapBuffers();
	g_pMaterialSystem->SetView( NULL );
	ValidateRect( m_hWnd, NULL );

	m_flRenderDelayTime = Plat_FloatTime() - flStartTime;
	m_flRenderDelayTime = max( m_flRenderDelayTime, 0.015f );
}
//-----------------------------------------------------------------------------
// Sets a panel to be the main panel
//-----------------------------------------------------------------------------
void CVsVGuiWindow::SetMainPanel( vgui::EditablePanel * pPanel )
{
	Assert( m_hMainPanel.Get() == NULL );
	Assert( m_hVGuiContext == vgui::DEFAULT_VGUI_CONTEXT );

	m_hMainPanel = pPanel;

	m_hMainPanel->SetParent( vgui::surface()->GetEmbeddedPanel() );
	m_hMainPanel->SetVisible( true );
	m_hMainPanel->SetCursor( vgui::dc_arrow );

	m_hVGuiContext = vgui::ivgui()->CreateContext();
	vgui::ivgui()->AssociatePanelWithContext( m_hVGuiContext, m_hMainPanel->GetVPanel() );

	pPanel->InvalidateLayout();

	EnableWindow( m_hWnd, true );
	SetFocus( m_hWnd );
}