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#include "ValueHistory.h"
#include "imgui.h"
#include <string.h>
#include <stdio.h>
#ifdef WIN32
# define snprintf _snprintf
#endif
ValueHistory::ValueHistory() :
m_hsamples(0)
{
for (int i = 0; i < MAX_HISTORY; ++i)
m_samples[i] = 0;
}
float ValueHistory::getSampleMin() const
{
float val = m_samples[0];
for (int i = 1; i < MAX_HISTORY; ++i)
if (m_samples[i] < val)
val = m_samples[i];
return val;
}
float ValueHistory::getSampleMax() const
{
float val = m_samples[0];
for (int i = 1; i < MAX_HISTORY; ++i)
if (m_samples[i] > val)
val = m_samples[i];
return val;
}
float ValueHistory::getAverage() const
{
float val = 0;
for (int i = 0; i < MAX_HISTORY; ++i)
val += m_samples[i];
return val/(float)MAX_HISTORY;
}
void GraphParams::setRect(int ix, int iy, int iw, int ih, int ipad)
{
x = ix;
y = iy;
w = iw;
h = ih;
pad = ipad;
}
void GraphParams::setValueRange(float ivmin, float ivmax, int indiv, const char* iunits)
{
vmin = ivmin;
vmax = ivmax;
ndiv = indiv;
strcpy(units, iunits);
}
void drawGraphBackground(const GraphParams* p)
{
// BG
imguiDrawRoundedRect((float)p->x, (float)p->y, (float)p->w, (float)p->h, (float)p->pad, imguiRGBA(64,64,64,128));
const float sy = (p->h-p->pad*2) / (p->vmax-p->vmin);
const float oy = p->y+p->pad-p->vmin*sy;
char text[64];
// Divider Lines
for (int i = 0; i <= p->ndiv; ++i)
{
const float u = (float)i/(float)p->ndiv;
const float v = p->vmin + (p->vmax-p->vmin)*u;
snprintf(text, 64, "%.2f %s", v, p->units);
const float fy = oy + v*sy;
imguiDrawText(p->x + p->w - p->pad, (int)fy-4, IMGUI_ALIGN_RIGHT, text, imguiRGBA(0,0,0,255));
imguiDrawLine((float)p->x + (float)p->pad, fy, (float)p->x + (float)p->w - (float)p->pad - 50, fy, 1.0f, imguiRGBA(0,0,0,64));
}
}
void drawGraph(const GraphParams* p, const ValueHistory* graph,
int idx, const char* label, const unsigned int col)
{
const float sx = (p->w - p->pad*2) / (float)graph->getSampleCount();
const float sy = (p->h - p->pad*2) / (p->vmax - p->vmin);
const float ox = (float)p->x + (float)p->pad;
const float oy = (float)p->y + (float)p->pad - p->vmin*sy;
// Values
float px=0, py=0;
for (int i = 0; i < graph->getSampleCount()-1; ++i)
{
const float x = ox + i*sx;
const float y = oy + graph->getSample(i)*sy;
if (i > 0)
imguiDrawLine(px,py, x,y, 2.0f, col);
px = x;
py = y;
}
// Label
const int size = 15;
const int spacing = 10;
int ix = p->x + p->w + 5;
int iy = p->y + p->h - (idx+1)*(size+spacing);
imguiDrawRoundedRect((float)ix, (float)iy, (float)size, (float)size, 2.0f, col);
char text[64];
snprintf(text, 64, "%.2f %s", graph->getAverage(), p->units);
imguiDrawText(ix+size+5, iy+3, IMGUI_ALIGN_LEFT, label, imguiRGBA(255,255,255,192));
imguiDrawText(ix+size+150, iy+3, IMGUI_ALIGN_RIGHT, text, imguiRGBA(255,255,255,128));
}
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