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//Author: Timothy Pearson <kb9vqf@pearsoncomputing.net>, (C) 2012
//Copyright: See COPYING file that comes with this distribution
#include "tracewidget.h"
#include <stdlib.h>
#include <tqpixmap.h>
#include <tqpainter.h>
TraceWidget::TraceWidget(TQWidget* parent, const char* name) : TQWidget(parent, name),
m_samples(0),
m_horizDivs(0),
m_vertDivs(0),
m_leftEdge(0),
m_rightEdge(0),
m_topEdge(0),
m_bottomEdge(0),
m_sampleArray(0),
m_graticulePixmap(0) {
setBackgroundMode(NoBackground);
setPaletteBackgroundColor(TQt::black);
setPaletteForegroundColor(TQColor(0,128,0));
}
TraceWidget::~TraceWidget() {
//
}
void TraceWidget::setNumberOfSamples(unsigned int samples) {
m_samples = samples;
if (m_sampleArray) {
delete [] m_sampleArray;
}
m_sampleArray = new double[m_samples];
updateGraticule();
}
void TraceWidget::setNumberOfHorizontalDivisions(unsigned int divisions) {
m_horizDivs = divisions;
updateGraticule();
}
void TraceWidget::setNumberOfVerticalDivisions(unsigned int divisions) {
m_vertDivs = divisions;
updateGraticule();
}
void TraceWidget::setDisplayLimits(double x, double y, double w, double h) {
m_leftEdge = x;
m_rightEdge = w;
m_topEdge = y;
m_bottomEdge = h;
}
double* TraceWidget::samples() {
return m_sampleArray;
}
void TraceWidget::updateGraticule() {
unsigned int d,s,x,y;
if (m_graticulePixmap) {
delete m_graticulePixmap;
}
m_graticulePixmap = new TQPixmap(width(), height());
// Draw the graticule into the pixmap
TQPainter p(m_graticulePixmap);
p.setPen(TQPen(foregroundColor(), 1, TQt::SolidLine));
p.fillRect(0, 0, m_graticulePixmap->width(), m_graticulePixmap->height(), backgroundColor());
p.setPen(TQPen(foregroundColor(), 1, TQt::DotLine));
if (m_vertDivs > 0) {
s = m_graticulePixmap->width() / m_vertDivs;
x = 0;
for (d=0; d<m_vertDivs; d++) {
p.drawLine(x, 0, x, m_graticulePixmap->height());
x += s;
}
}
if (m_horizDivs > 0) {
s = m_graticulePixmap->height() / m_horizDivs;
y = 0;
for (d=0; d<m_horizDivs; d++) {
p.drawLine(0, y, m_graticulePixmap->width(), y);
y += s;
}
}
p.setPen(TQPen(foregroundColor(), 1, TQt::SolidLine));
p.drawRect(0, 0, m_graticulePixmap->width(), m_graticulePixmap->height());
// Repaint the widget
repaint();
}
void TraceWidget::paintEvent(TQPaintEvent*) {
TQPainter p(this);
p.setPen(foregroundColor().light(150));
if ((m_graticulePixmap) && (m_bottomEdge != m_topEdge)) {
// Draw the graticule pixmap to erase the widget
p.drawPixmap(0, 0, *m_graticulePixmap);
// Draw the points
unsigned int n;
int x,y,x2,y2;
for (n=0; n<m_samples-1; n++) {
x = abs(((n*1.0)/(m_samples-1))*(m_graticulePixmap->width()));
y = abs(((m_sampleArray[n]-m_topEdge)/(m_bottomEdge-m_topEdge))*(m_graticulePixmap->height()));
x2 = abs(((n+1*1.0)/(m_samples-1))*(m_graticulePixmap->width()));
y2 = abs(((m_sampleArray[n+1]-m_topEdge)/(m_bottomEdge-m_topEdge))*(m_graticulePixmap->height()));
p.drawLine(x, y, x2, y2);
}
}
else {
p.fillRect(x(), y(), width(), height(), backgroundColor());
}
}
void TraceWidget::resizeEvent(TQResizeEvent *) {
updateGraticule();
}
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