Adding dual channel to scope example, fixing logic and QT source code.

Examples/ADC/Scope-QT-src/signaldisplay.cpp

@@ -0,0 +1,61 @@
+#include "signaldisplay.h"
+#include <QtGui>
+#include <QDebug>
+
+SignalDisplay::SignalDisplay(QWidget *&parent):QWidget(parent)
+{
+	colorTrace1 = Qt::blue;
+	colorTrace2 = Qt::red;
+    secsPerDiv = 1.0/600.0;
+	voltsPerDiv = 20;
+	setPointsPerPlot(10);
+}
+
+void SignalDisplay::setPointsPerPlot(int value)
+{
+	pointsPerPlot = value;
+	wave1 = new QPoint[pointsPerPlot];
+	wave2 = new QPoint[pointsPerPlot];
+	secsIdx1 =  0; secsIdx2 =  0;
+}
+
+void SignalDisplay::drawGrid(QPainter &p, QColor colorGrid, int x, int y, int w, int h, int nx, int ny){
+	p.setPen(colorGrid);
+	for (int ix= 0; ix<nx; ix++){
+		int x = ix*w/nx;
+		p.drawLine(x,0,x,h);
+	}
+	for (int iy = 0; iy < ny; iy++){
+		int y = iy*h/ny;
+		p.drawLine(0,y,w,y);
+	}
+}
+void SignalDisplay::paintEvent(QPaintEvent *event){
+	QPainter painter(this);
+	w = width();
+	h = height();
+	ox = w;
+	oy = h;
+	painter.fillRect(0,0,w,h,Qt::white);
+	drawGrid(painter, Qt::lightGray,0,0,w,h,5, 10);
+	painter.setPen(colorTrace1);
+	painter.drawPolyline(wave1,pointsPerPlot);
+	painter.setPen(colorTrace2);
+	painter.drawPolyline(wave2,pointsPerPlot);
+}
+
+void SignalDisplay::addPoint1( int value)
+{
+	wave1[secsIdx1] = 	QPoint(secsIdx1*w/10/60.0/pointsPerPlot/secsPerDiv+w/(2*pointsPerPlot), \
+						oy-value*h/voltsPerDiv/10);
+	secsIdx1 = (secsIdx1+1) % pointsPerPlot;
+}
+
+void SignalDisplay::addPoint2( int value)
+{
+	wave2[secsIdx2] = 	QPoint(secsIdx2*w/10/60.0/pointsPerPlot/secsPerDiv+w/(2*pointsPerPlot), \
+						oy-value*h/voltsPerDiv/10);
+	secsIdx2 = (secsIdx2+1) % pointsPerPlot;
+}
+
+//EOF