SweepTimingWidget implemented show_125_list

[pulseview.git] / pv / widgets / sweeptimingwidget.cpp

diff --git a/pv/widgets/sweeptimingwidget.cpp b/pv/widgets/sweeptimingwidget.cpp
index d34d07e5f7c2a43cea1ed8b870253c358c2550ad..9bb75c869a8f780c52e3e6590e2a54ebad94931e 100644 (file)
--- a/pv/widgets/sweeptimingwidget.cpp
+++ b/pv/widgets/sweeptimingwidget.cpp
@@ -20,8 +20,14 @@
 
 #include "sweeptimingwidget.h"
 
+#include <vector>
+
 #include <assert.h>
 
+#include <extdef.h>
+
+using std::vector;
+
 namespace pv {
 namespace widgets {
 
@@ -61,6 +67,9 @@ void SweepTimingWidget::show_none()
 void SweepTimingWidget::show_min_max_step(uint64_t min, uint64_t max,
        uint64_t step)
 {
+       assert(max > min);
+       assert(step > 0);
+
        _value_type = MinMaxStep;
 
        _value.setRange(min, max);
@@ -87,6 +96,46 @@ void SweepTimingWidget::show_list(const uint64_t *vals, size_t count)
        _list.show();
 }
 
+void SweepTimingWidget::show_125_list(uint64_t min, uint64_t max)
+{
+       assert(max > min);
+
+       // Create a 1-2-5-10 list of entries.
+       const unsigned int FineScales[] = {1, 2, 5};
+       uint64_t value, decade;
+       unsigned int fine;
+       vector<uint64_t> values;
+
+       // Compute the starting decade
+       for (decade = 1; decade * 10 <= min; decade *= 10);
+
+       // Compute the first entry
+       for (fine = 0; fine < countof(FineScales); fine++)
+               if (FineScales[fine] * decade >= min)
+                       break;
+
+       assert(fine < countof(FineScales));
+
+       // Add the minimum entry if it's not on the 1-2-5 progression
+       if (min != FineScales[fine] * decade)
+               values.push_back(min);
+
+       while ((value = FineScales[fine] * decade) < max) {
+               values.push_back(value);
+               if (++fine >= countof(FineScales))
+                       fine = 0, decade *= 10;
+       }
+
+       // Add the max value
+       values.push_back(max);
+
+       // Make a C array, and give it to the sweep timing widget
+       uint64_t *const values_array = new uint64_t[values.size()];
+       copy(values.begin(), values.end(), values_array);
+       show_list(values_array, values.size());
+       delete[] values_array;
+}
+
 uint64_t SweepTimingWidget::value() const
 {
        switch(_value_type)