Modified source engine (2017) developed by valve and leaked in 2020. Not for commercial purporses
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//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose:
//
//=============================================================================//
#include <math.h>
#include <vgui_controls/GraphPanel.h>
#include <vgui/IScheme.h>
#include <vgui/ISurface.h>
#include <vgui/IVGui.h>
// memdbgon must be the last include file in a .cpp file!!!
#include <tier0/memdbgon.h>
using namespace vgui;
DECLARE_BUILD_FACTORY( GraphPanel );
//-----------------------------------------------------------------------------
// Purpose: Constructor
//-----------------------------------------------------------------------------
GraphPanel::GraphPanel(Panel *parent, const char *name) : BaseClass(parent, name)
{
m_flDomainSize = 100.0f;
m_flLowRange = 0.0f;
m_flHighRange = 1.0f;
m_bUseDynamicRange = true;
m_flMinDomainSize = 0.0f;
m_flMaxDomainSize = 0.0f;
m_bMaxDomainSizeSet = false;
// rendering, need to pull these from scheme/res file
m_iGraphBarWidth = 2;
m_iGraphBarGapWidth = 2;
}
//-----------------------------------------------------------------------------
// Purpose: domain settings (x-axis settings)
//-----------------------------------------------------------------------------
void GraphPanel::SetDisplayDomainSize(float size)
{
m_flDomainSize = size;
// set the max domain size if it hasn't been set yet
if (!m_bMaxDomainSizeSet)
{
SetMaxDomainSize(size);
}
}
//-----------------------------------------------------------------------------
// Purpose: sets the smallest domain that will be displayed
//-----------------------------------------------------------------------------
void GraphPanel::SetMinDomainSize(float size)
{
m_flMinDomainSize = size;
}
//-----------------------------------------------------------------------------
// Purpose: sets the samples to keep
//-----------------------------------------------------------------------------
void GraphPanel::SetMaxDomainSize(float size)
{
m_flMaxDomainSize = size;
m_bMaxDomainSizeSet = true;
}
//-----------------------------------------------------------------------------
// Purpose: range settings (y-axis settings)
//-----------------------------------------------------------------------------
void GraphPanel::SetUseFixedRange(float lowRange, float highRange)
{
m_bUseDynamicRange = false;
m_flLowRange = lowRange;
m_flHighRange = highRange;
}
//-----------------------------------------------------------------------------
// Purpose: Sets the graph to dynamically determine the range
//-----------------------------------------------------------------------------
void GraphPanel::SetUseDynamicRange(float *rangeList, int numRanges)
{
m_bUseDynamicRange = true;
m_RangeList.CopyArray(rangeList, numRanges);
}
//-----------------------------------------------------------------------------
// Purpose: Gets the currently displayed range
//-----------------------------------------------------------------------------
void GraphPanel::GetDisplayedRange(float &lowRange, float &highRange)
{
lowRange = m_flLowRange;
highRange = m_flHighRange;
}
//-----------------------------------------------------------------------------
// Purpose: adds an item to the end of the list
//-----------------------------------------------------------------------------
void GraphPanel::AddItem(float sampleEnd, float sampleValue)
{
if (m_Samples.Count() && m_Samples[m_Samples.Tail()].value == sampleValue)
{
// collapse identical samples
m_Samples[m_Samples.Tail()].sampleEnd = sampleEnd;
}
else
{
// add to the end of the samples list
Sample_t item;
item.value = sampleValue;
item.sampleEnd = sampleEnd;
m_Samples.AddToTail(item);
}
// see if this frees up any samples past the end
if (m_bMaxDomainSizeSet)
{
float freePoint = sampleEnd - m_flMaxDomainSize;
while (m_Samples[m_Samples.Head()].sampleEnd < freePoint)
{
m_Samples.Remove(m_Samples.Head());
}
}
/*
// see the max number of samples necessary to display this information reasonably precisely
static const int MAX_LIKELY_GRAPH_WIDTH = 800;
int maxSamplesNeeded = 2 * MAX_LIKELY_GRAPH_WIDTH / (m_iGraphBarWidth + m_iGraphBarGapWidth);
if (m_Samples.Count() > 2)
{
// see if we can collapse some items
float highestSample = m_Samples[m_Samples.Tail()].sampleEnd;
// iterate the items
// always keep the head around so we have something to go against
int sampleIndex = m_Samples.Next(m_Samples.Head());
int nextSampleIndex = m_Samples.Next(sampleIndex);
while (m_Samples.IsInList(nextSampleIndex))
{
// calculate what sampling precision is actually needed to display this data
float distanceFromEnd = highestSample - m_Samples[sampleIndex].sampleEnd;
// if (distanceFromEnd < m_flDomainSize)
// break;
//!! this calculation is very incorrect
float minNeededSampleSize = distanceFromEnd / (m_flMinDomainSize * maxSamplesNeeded);
float sampleSize = m_Samples[nextSampleIndex].sampleEnd - m_Samples[sampleIndex].sampleEnd;
if (sampleSize < minNeededSampleSize)
{
// collapse the item into the next index
m_Samples[nextSampleIndex].value = 0.5f * (m_Samples[nextSampleIndex].value + m_Samples[sampleIndex].value);
// remove the item from the list
m_Samples.Remove(sampleIndex);
// move to the next item
sampleIndex = nextSampleIndex;
nextSampleIndex = m_Samples.Next(sampleIndex);
}
else
{
// this item didn't need collapsing, so assume the next item won't
break;
}
}
}
*/
InvalidateLayout();
Repaint();
}
//-----------------------------------------------------------------------------
// Purpose: returns number of items that can be displayed
//-----------------------------------------------------------------------------
int GraphPanel::GetVisibleItemCount()
{
return GetWide() / (m_iGraphBarWidth + m_iGraphBarGapWidth);
}
//-----------------------------------------------------------------------------
// Purpose: lays out the graph
//-----------------------------------------------------------------------------
void GraphPanel::PerformLayout()
{
BaseClass::PerformLayout();
}
//-----------------------------------------------------------------------------
// Purpose: draws the graph
//-----------------------------------------------------------------------------
void GraphPanel::Paint()
{
if (!m_Samples.Count())
return;
// walk from right to left drawing the resampled data
int sampleIndex = m_Samples.Tail();
int x = GetWide() - (m_iGraphBarWidth + m_iGraphBarGapWidth);
// calculate how big each sample should be
float sampleSize = m_flDomainSize / GetVisibleItemCount();
// calculate where in the domain we start resampling
float resampleStart = m_Samples[sampleIndex].sampleEnd - sampleSize;
// always resample from a sample point that is a multiple of the sampleSize
resampleStart -= (float)fmod(resampleStart, sampleSize);
// bar size multiplier
float barSizeMultiplier = GetTall() / (m_flHighRange - m_flLowRange);
// set render color
surface()->DrawSetColor(GetFgColor());
// recalculate the sample range for dynamic resizing
float flMinValue = m_Samples[m_Samples.Head()].value;
float flMaxValue = m_Samples[m_Samples.Head()].value;
// iterate the bars to draw
while (x > 0 && m_Samples.IsInList(sampleIndex))
{
// move back the drawing point
x -= (m_iGraphBarWidth + m_iGraphBarGapWidth);
// collect the samples
float value = 0.0f;
float maxValue = 0.0f;
int samplesTouched = 0;
int prevSampleIndex = m_Samples.Previous(sampleIndex);
while (m_Samples.IsInList(prevSampleIndex))
{
// take the value
value += m_Samples[sampleIndex].value;
samplesTouched++;
// do some work to calculate the sample range
if (m_Samples[sampleIndex].value < flMinValue)
{
flMinValue = m_Samples[sampleIndex].value;
}
if (m_Samples[sampleIndex].value > flMaxValue)
{
flMaxValue = m_Samples[sampleIndex].value;
}
if (m_Samples[sampleIndex].value > maxValue)
{
maxValue = m_Samples[sampleIndex].value;
}
if (resampleStart < m_Samples[prevSampleIndex].sampleEnd)
{
// we're out of the sampling range, we need to move on to the next sample
sampleIndex = prevSampleIndex;
prevSampleIndex = m_Samples.Previous(sampleIndex);
}
else
{
// we're done with this resample
// move back the resample start
resampleStart -= sampleSize;
// draw the current item
break;
}
}
// draw the item
// show the max value in the sample, not the average
int size = (int)(maxValue * barSizeMultiplier);
// int size = (int)((value * barSizeMultiplier) / samplesTouched);
surface()->DrawFilledRect(x, GetTall() - size, x + m_iGraphBarWidth, GetTall());
}
// calculate our final range (for use next frame)
if (m_bUseDynamicRange)
{
flMinValue = 0;
// find the range that fits
for (int i = 0; i < m_RangeList.Count(); i++)
{
if (m_RangeList[i] > flMaxValue)
{
flMaxValue = m_RangeList[i];
break;
}
}
m_flLowRange = flMinValue;
m_flHighRange = flMaxValue;
}
}
//-----------------------------------------------------------------------------
// Purpose: sets up colors
//-----------------------------------------------------------------------------
void GraphPanel::ApplySchemeSettings(IScheme *pScheme)
{
BaseClass::ApplySchemeSettings(pScheme);
SetFgColor(GetSchemeColor("GraphPanel.FgColor", pScheme));
SetBgColor(GetSchemeColor("GraphPanel.BgColor", pScheme));
SetBorder(pScheme->GetBorder("ButtonDepressedBorder"));
}