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game/client/tf/vgui/tf_asyncpanel.cpp

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+#include "cbase.h"
+#include "tf_asyncpanel.h"
+#include "econ_controls.h"
+
+static const float k_flRequestInterval = 5.f;
+static const float k_flNeverRequestUpdate = -1.f;
+
+
+CBaseASyncPanel::CBaseASyncPanel( Panel *pParent, const char *pszPanelName )
+	: EditablePanel( pParent, pszPanelName )
+	, m_flLastRequestTime( 0.f )
+	, m_flLastUpdatedTime( 0.f )
+	, m_bDataInitialized( false )
+	, m_bSettingsApplied( false )
+{
+	ivgui()->AddTickSignal( GetVPanel(), 1.f );
+}
+
+void CBaseASyncPanel::ApplySchemeSettings( IScheme *pScheme )
+{
+	BaseClass::ApplySchemeSettings( pScheme );
+
+	m_bSettingsApplied = true;
+	m_flLastUpdatedTime = 0.f; // Force a refresh
+}
+
+
+void CBaseASyncPanel::LoadControlSettings(const char *dialogResourceName, const char *pathID, KeyValues *pPreloadedKeyValues, KeyValues *pConditions )
+{
+	m_vecLoadingPanels.Purge();
+	m_vecPanelsToShow.Purge();
+
+	BaseClass::LoadControlSettings( dialogResourceName, pathID, pPreloadedKeyValues, pConditions );
+}
+
+void CBaseASyncPanel::PerformLayout()
+{
+	BaseClass::PerformLayout();
+
+	FOR_EACH_VEC( m_vecLoadingPanels, i )
+	{
+		m_vecLoadingPanels[ i ]->SetVisible( true );
+	}
+
+	FOR_EACH_VEC( m_vecPanelsToShow, i )
+	{
+		m_vecPanelsToShow[ i ]->SetVisible( false );
+	}
+}
+
+
+void CBaseASyncPanel::OnChildSettingsApplied( KeyValues *pInResourceData, Panel *pChild )
+{
+	const char *pszAsync = pInResourceData->GetString( "asynchandling", NULL );
+
+	if ( pszAsync == NULL )
+		return;
+
+	if ( FStrEq( pszAsync, "content" ) )
+	{
+		m_vecPanelsToShow[ m_vecPanelsToShow.AddToTail() ].Set( pChild );
+	}
+	else if ( FStrEq( pszAsync, "loading" ) )
+	{
+		m_vecLoadingPanels[ m_vecLoadingPanels.AddToTail() ].Set( pChild );
+	}
+}
+
+bool CBaseASyncPanel::IsInitialized() const
+{
+	return m_bDataInitialized;
+}
+
+void CBaseASyncPanel::PresentDataIfReady()
+{
+	if ( m_bDataInitialized && m_bSettingsApplied )
+	{
+		FOR_EACH_VEC( m_vecLoadingPanels, i )
+		{
+			m_vecLoadingPanels[ i ]->SetVisible( false );
+		}
+
+		FOR_EACH_VEC( m_vecPanelsToShow, i )
+		{
+			m_vecPanelsToShow[ i ]->SetVisible( true );
+		}
+
+		// stop ticking. job is done.
+		ivgui()->RemoveTickSignal( GetVPanel() );
+	}
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: Checks if data is ready.  If so, mark the time and hide the loading image
+//-----------------------------------------------------------------------------
+void CBaseASyncPanel::CheckForData()
+{
+	m_flLastRequestTime = Plat_FloatTime();
+	if ( CheckForData_Internal() )
+	{
+		m_flLastUpdatedTime = Plat_FloatTime();
+		m_bDataInitialized = true;
+		PresentDataIfReady();
+	}
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: Check if we need to check for data
+//-----------------------------------------------------------------------------
+void CBaseASyncPanel::OnTick()
+{
+	const float flTimeSinceUpdate = Plat_FloatTime() - m_flLastUpdatedTime;
+	const float flTimeSinceRequest = Plat_FloatTime() - m_flLastRequestTime;
+	// Need an update if we're beyodn the refresh delay, and our refresh delay isn't k_flNeverRequestUpdate, or if we're just not initialized
+	const bool bNeedsUpdate = ( ( flTimeSinceUpdate > m_flRefreshDelay ) && ( m_flRefreshDelay != k_flNeverRequestUpdate ) ) || m_flLastUpdatedTime == 0.f;
+
+	if ( m_bSettingsApplied && bNeedsUpdate && flTimeSinceRequest > k_flRequestInterval )
+	{
+		CheckForData();
+	}
+}