#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) :
+const QColor AnalogSignal::SignalColours[4] = {
+ QColor(0xC4, 0xA0, 0x00), // Yellow
+ QColor(0x87, 0x20, 0x7A), // Magenta
+ QColor(0x20, 0x4A, 0x87), // Blue
+ QColor(0x4E, 0x9A, 0x06) // Green
+};
+
+AnalogSignal::AnalogSignal(QString name, shared_ptr<data::Analog> data,
+ int probe_index) :
Signal(name),
- _data(data)
+ _data(data),
+ _scale(1.0f)
{
- _colour = Qt::blue;
+ _colour = SignalColours[probe_index % countof(SignalColours)];
}
-void AnalogSignal::paint(QPainter &p, const QRect &rect, double scale,
- double offset)
+void AnalogSignal::set_scale(float scale)
{
+ _scale = scale;
}
-int AnalogSignal::get_nominal_offset(const QRect &rect) const
+void AnalogSignal::paint(QPainter &p, int y, int left, int right, double scale,
+ double offset)
{
- return rect.bottom();
+ assert(scale > 0);
+ assert(_data);
+ assert(right >= left);
+
+ 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 int64_t sample_count = end_sample - start_sample;
+
+ const float* samples = snapshot->get_samples(
+ start_sample, end_sample);
+ assert(samples);
+
+ QPointF *points = new QPointF[sample_count];
+ 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,
+ y - samples[sample - start_sample] * _scale);
+ }
+
+ p.setPen(_colour);
+ p.drawPoints(points, point - points);
+
+ delete[] points;
}
} // namespace view