Add the histogram viewer and clock guess button.

2025-10-31 11:17:01 -07:00 · 2023-04-05 20:43:49 +00:00
parent 56a4926bd3
commit 8e0ca85d1e
7 changed files with 1174 additions and 848 deletions
--- a/src/gui/histogramviewer.cc
+++ b/src/gui/histogramviewer.cc
@@ -0,0 +1,83 @@
+#include "lib/globals.h"
+#include "gui.h"
+#include "lib/fluxmap.h"
+#include "histogramviewer.h"
+
+static constexpr int BORDER = 10;
+static constexpr int WIDTH = 256;
+static constexpr int HEIGHT = 100;
+
+// clang-format off
+wxBEGIN_EVENT_TABLE(HistogramViewer, wxWindow)
+	EVT_PAINT(HistogramViewer::OnPaint)
+wxEND_EVENT_TABLE();
+// clang-format on
+
+HistogramViewer::HistogramViewer(wxWindow* parent,
+    wxWindowID winid,
+    const wxPoint& pos,
+    const wxSize& size,
+    long style):
+    wxWindow(parent,
+        winid,
+        pos,
+        wxSize(WIDTH + 2 * BORDER, HEIGHT + 2 * BORDER),
+        style)
+{
+    _font = GetFont().MakeSmaller().MakeSmaller().MakeSmaller();
+}
+
+void HistogramViewer::Redraw(const Fluxmap& fluxmap, nanoseconds_t clock)
+{
+    _data = fluxmap.guessClock();
+    _clock = clock;
+    Refresh();
+}
+
+void HistogramViewer::OnPaint(wxPaintEvent&)
+{
+    wxPaintDC dc(this);
+    dc.SetBackground(wxSystemSettings::GetColour(wxSYS_COLOUR_FRAMEBK));
+    dc.Clear();
+
+    uint32_t max =
+        *std::max_element(std::begin(_data.buckets), std::end(_data.buckets));
+    dc.SetPen(*wxGREY_PEN);
+    for (int x = 0; x < 256; x++)
+    {
+        double v = (double)_data.buckets[x] / (double)max;
+        dc.DrawLine({BORDER + x, BORDER + HEIGHT},
+            {BORDER + x, BORDER + HEIGHT - (int)(v * HEIGHT)});
+    }
+
+    dc.SetPen(*wxBLACK_PEN);
+    dc.DrawLine({BORDER, BORDER + HEIGHT}, {BORDER + WIDTH, BORDER + HEIGHT});
+    dc.DrawLine({BORDER, BORDER + HEIGHT}, {BORDER, BORDER});
+
+    dc.SetPen(*wxRED_PEN);
+    {
+        int y = ((double)_data.signalLevel / (double)max) * HEIGHT;
+        dc.DrawLine({0, BORDER + HEIGHT - y},
+            {2 * BORDER + WIDTH, BORDER + HEIGHT - y});
+    }
+
+    {
+        int x = _clock / NS_PER_TICK;
+        dc.DrawLine({BORDER + x, 2 * BORDER + HEIGHT}, {BORDER + x, 0});
+    }
+
+    {
+        wxString text = "Clock interval";
+        dc.SetFont(_font);
+        auto size = dc.GetTextExtent(text);
+        dc.DrawText(text, {BORDER + WIDTH - size.GetWidth(), BORDER + HEIGHT});
+    }
+
+    {
+        wxString text = "Frequency";
+        dc.SetFont(_font);
+        auto size = dc.GetTextExtent(text);
+        dc.DrawRotatedText(
+            text, BORDER - size.GetHeight(), BORDER + size.GetWidth(), 90);
+    }
+}