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public/vgui_controls/GraphPanel.h

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+//=============================================================================//
+
+#ifndef GRAPHPANEL_H
+#define GRAPHPANEL_H
+#ifdef _WIN32
+#pragma once
+#endif
+
+#include <vgui_controls/Panel.h>
+#include "utllinkedlist.h"
+#include "utlvector.h"
+
+namespace vgui
+{
+
+//-----------------------------------------------------------------------------
+// Purpose: Holds and displays a chart
+//-----------------------------------------------------------------------------
+class GraphPanel : public Panel
+{
+	DECLARE_CLASS_SIMPLE( GraphPanel, Panel );
+
+public:
+	GraphPanel(Panel *parent, const char *name);
+	
+	// domain settings (x-axis settings)
+	// sets the window of samples to display
+	void SetDisplayDomainSize(float size);
+	// sets the range of samples the graph should keep
+	// should be set to the max you would set the display domain size
+	void SetMaxDomainSize(float size);
+	// sets the minimum domain that will be displayed; used to collapse samples
+	void SetMinDomainSize(float size);
+
+	// range settings (y-axis settings)
+	void SetUseFixedRange(float lowRange, float highRange);
+	void SetUseDynamicRange(float *rangeList, int numRanges);
+	void GetDisplayedRange(float &lowRange, float &highRange);
+
+	// adds an item to the end of the list
+	// sampleEnd is assumed to be the trailing edge of the sample
+	// assumes that the samples are fairly evenly spaced (not much more work to do to fix this though)
+	void AddItem(float sampleEnd, float sampleValue);
+
+protected:
+	virtual void Paint();
+	virtual void PerformLayout();
+	virtual void ApplySchemeSettings(IScheme *pScheme);
+
+private:
+	int GetVisibleItemCount();
+
+	struct Sample_t
+	{
+		float sampleEnd;
+		float value;
+	};
+	CUtlLinkedList<Sample_t, int> m_Samples;
+
+	// the window to show
+	float m_flDomainSize;
+	float m_flMaxDomainSize, m_flMinDomainSize;
+	bool m_bMaxDomainSizeSet;
+
+	// range
+	float m_flLowRange, m_flHighRange;
+	bool m_bUseDynamicRange;
+	CUtlVector<float> m_RangeList;
+
+	// rendering
+	int m_iGraphBarWidth;
+	int m_iGraphBarGapWidth;
+};
+
+} // namespace vgui
+
+#endif // GRAPHPANEL_H