1 files changed, 56 insertions, 0 deletions
diff --git a/public/panorama/controls/panelhandle.h b/public/panorama/controls/panelhandle.h
new file mode 100644
index 0000000..bbd868b
--- /dev/null
+++ b/public/panorama/controls/panelhandle.h
@@ -0,0 +1,56 @@
+//=========== Copyright Valve Corporation, All rights reserved. ===============//
+//
+// Purpose: 
+//=============================================================================//
+
+#ifndef PANELHANDLE_H
+#define PANELHANDLE_H
+
+#ifdef _WIN32
+#pragma once
+#endif
+
+#include "tier0/platform.h"
+
+namespace panorama
+{
+
+const uint64 k_ulInvalidPanelHandle64 = 0x00000000FFFFFFFF;
+
+//
+// Safe handle to a panel. To get pointer to actual panel, call IUIEngine::GetPanelPtr
+//
+struct PanelHandle_t
+{
+	int32 m_iPanelIndex;			// index into panel map
+	uint32 m_unSerialNumber;		// unique number used to ensure that panel at m_iPanelIndex is still the panel we originally pointed to
+
+	bool operator<( const PanelHandle_t &rhs ) const
+	{
+		if ( m_iPanelIndex != rhs.m_iPanelIndex )
+			return m_iPanelIndex < rhs.m_iPanelIndex;
+
+		return m_unSerialNumber < rhs.m_unSerialNumber;
+	}
+
+	bool operator==( const PanelHandle_t &rhs ) const
+	{
+		return (m_iPanelIndex == rhs.m_iPanelIndex) && (m_unSerialNumber == rhs.m_unSerialNumber);
+	}
+
+	bool operator!=( const PanelHandle_t &rhs ) const
+	{
+		return !(*this == rhs);
+	}
+
+
+	static const PanelHandle_t &InvalidHandle()
+	{
+		static PanelHandle_t s_invalid = { k_ulInvalidPanelHandle64 >> 32, 0xffffffff & k_ulInvalidPanelHandle64 };
+		return s_invalid;
+	}
+};
+
+} // namespace panorama
+
+#endif // PANELHANDLE_H