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