clyne/stmdspgui
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add frequency cursor

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Clyne 2023-07-08 14:54:27 -04:00
parent 5e83a22455
commit 9226bc5523
Signed by: clyne
GPG Key ID: 3267C8EBF3F9AFC7
1 changed files with 15 additions and 1 deletions
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16
source/gui_device.cpp
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@ -473,13 +473,15 @@ void deviceRenderDraw()
}
}
const auto Fs = m_device->get_sample_rate();
const float di = static_cast<float>(buffer.size() / 2) / size.x;
const float dx = std::ceil(size.x / static_cast<float>(buffer.size()));
ImVec2 pp = p0;
float i = 0;
while (pp.x < p0.x + size.x) {
unsigned int idx = i;
float n = std::clamp(bufferFFTOut[idx].r / buffer.size() / 2.f, 0.f, 1.f);
float n = std::clamp(bufferFFTOut[idx].r / Fs / 4.f, 0.f, 1.f);
i += di;
ImVec2 next (pp.x + dx, p0.y + size.y * (1 - n));
@ -487,6 +489,18 @@ void deviceRenderDraw()
pp = next;
}
const auto mouse = ImGui::GetMousePos();
if (mouse.x > p0.x && mouse.x < p0.x + size.x &&
mouse.y > p0.y && mouse.y < p0.y + size.y)
{
char buf[16];
drawList->AddLine({mouse.x, p0.y}, {mouse.x, p0.y + size.y}, IM_COL32(255, 255, 0, 255));
const std::size_t si = (mouse.x - p0.x) / size.x * Fs / 2;
snprintf(buf, sizeof(buf), " %5luHz", si);
drawList->AddText(mouse, IM_COL32(255, 0, 0, 255), buf);
}
ImGui::End();
}
}