#include <math.h>
#include "analogsignal.h"
-#include "../analogdata.h"
-#include "../analogdatasnapshot.h"
+#include "pv/data/analog.h"
+#include "pv/data/analogsnapshot.h"
using namespace boost;
using namespace std;
namespace pv {
namespace view {
-AnalogSignal::AnalogSignal(QString name, shared_ptr<AnalogData> data) :
+AnalogSignal::AnalogSignal(QString name, shared_ptr<data::Analog> data) :
Signal(name),
_data(data)
{
_colour = Qt::blue;
}
-void AnalogSignal::paint(QPainter &p, const QRect &rect, double scale,
+void AnalogSignal::paint(QPainter &p, int y, int left, int right, double scale,
double offset)
{
-}
+ assert(scale > 0);
+ assert(_data);
+ assert(right >= left);
-int AnalogSignal::get_nominal_offset(const QRect &rect) const
-{
- return rect.bottom();
+ paint_axis(p, y, left, right);
+
+ const deque< shared_ptr<pv::data::AnalogSnapshot> > &snapshots =
+ _data->get_snapshots();
+ if (snapshots.empty())
+ return;
+
+ const shared_ptr<pv::data::AnalogSnapshot> &snapshot =
+ snapshots.front();
+
+ const double pixels_offset = offset / scale;
+ const double samplerate = _data->get_samplerate();
+ const double start_time = _data->get_start_time();
+ const int64_t last_sample = snapshot->get_sample_count() - 1;
+ const double samples_per_pixel = samplerate * scale;
+ const double start = samplerate * (offset - start_time);
+ const double end = start + samples_per_pixel * (right - left);
+
+ const int64_t start_sample = min(max((int64_t)floor(start),
+ (int64_t)0), last_sample);
+ const int64_t end_sample = min(max((int64_t)ceil(end),
+ (int64_t)0), last_sample);
+
+ const float* samples = snapshot->get_samples();
+ assert(samples);
+
+ QPointF *points = new QPointF[end_sample - start_sample];
+ QPointF *point = points;
+
+ for (int64_t sample = start_sample;
+ sample != end_sample; sample++) {
+ const float x = (sample / samples_per_pixel -
+ pixels_offset) + left;
+ *point++ = QPointF(x, samples[sample] + y);
+ }
+
+ p.drawPoints(points, point - points);
+
+ delete[] points;
}
} // namespace view