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commit no. 8

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This commit is contained in:
Erik Bročko
2026-03-25 19:48:30 +01:00
parent 7b9a87fbc0
commit 740f957b7c
1 changed files with 39 additions and 21 deletions
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60
src/ui/Cursors.cpp
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@@ -61,7 +61,8 @@ void Cursors::draw(const SpectrumDisplay& specDisplay,
float viewLo, float viewHi) const {
ImDrawList* dl = ImGui::GetWindowDrawList();
auto drawCursor = [&](const CursorInfo& c, float dispDB, ImU32 color, const char* label) {
// Draw cursor lines and crosshairs (no labels here).
auto drawCursorMarker = [&](const CursorInfo& c, float dispDB, ImU32 color) {
if (!c.active) return;
float x = specDisplay.freqToScreenX(c.freq, posX, sizeX,
sampleRate, isIQ, freqScale,
@@ -70,36 +71,53 @@ void Cursors::draw(const SpectrumDisplay& specDisplay,
dbNorm = std::clamp(dbNorm, 0.0f, 1.0f);
float y = posY + sizeY * (1.0f - dbNorm);
// Vertical line
dl->AddLine({x, posY}, {x, posY + sizeY}, color, 1.0f);
// Horizontal line
dl->AddLine({posX, y}, {posX + sizeX, y}, color & 0x80FFFFFF, 1.0f);
// Crosshair
dl->AddCircle({x, y}, 5.0f, color, 12, 2.0f);
};
// Label
char buf[128];
if (std::abs(c.freq) >= 1e6)
std::snprintf(buf, sizeof(buf), "%s: %.6f MHz %.1f dB",
label, c.freq / 1e6, dispDB);
else if (std::abs(c.freq) >= 1e3)
std::snprintf(buf, sizeof(buf), "%s: %.3f kHz %.1f dB",
label, c.freq / 1e3, dispDB);
// Format a cursor label string.
auto formatLabel = [](char* buf, size_t sz, const char* label, double freq, float dB) {
if (std::abs(freq) >= 1e6)
std::snprintf(buf, sz, "%s: %.6f MHz %.1f dB", label, freq / 1e6, dB);
else if (std::abs(freq) >= 1e3)
std::snprintf(buf, sz, "%s: %.3f kHz %.1f dB", label, freq / 1e3, dB);
else
std::snprintf(buf, sizeof(buf), "%s: %.1f Hz %.1f dB",
label, c.freq, dispDB);
std::snprintf(buf, sz, "%s: %.1f Hz %.1f dB", label, freq, dB);
};
ImVec2 textSize = ImGui::CalcTextSize(buf);
float tx = std::min(x + 8, posX + sizeX - textSize.x - 4);
float ty = std::max(y - 18, posY + 2);
dl->AddRectFilled({tx - 2, ty - 1}, {tx + textSize.x + 2, ty + textSize.y + 1},
float aDB = avgDBA(), bDB = avgDBB();
drawCursorMarker(cursorA, aDB, IM_COL32(255, 255, 0, 220));
drawCursorMarker(cursorB, bDB, IM_COL32(0, 200, 255, 220));
// Draw labels at the top, touching the cursor's vertical line.
// If the label would overflow the right edge, flip it to the left side.
auto drawCursorLabel = [&](const CursorInfo& c, float dispDB, ImU32 color,
const char* label, int row) {
if (!c.active) return;
float x = specDisplay.freqToScreenX(c.freq, posX, sizeX,
sampleRate, isIQ, freqScale,
viewLo, viewHi);
char buf[128];
formatLabel(buf, sizeof(buf), label, c.freq, dispDB);
ImVec2 sz = ImGui::CalcTextSize(buf);
float lineH = ImGui::GetTextLineHeight();
float ty = posY + 4 + row * (lineH + 4);
// Place right of cursor line; flip left if it would overflow.
float tx;
if (x + 6 + sz.x + 2 <= posX + sizeX)
tx = x + 6;
else
tx = x - 6 - sz.x;
dl->AddRectFilled({tx - 2, ty - 1}, {tx + sz.x + 2, ty + sz.y + 1},
IM_COL32(0, 0, 0, 180));
dl->AddText({tx, ty}, color, buf);
};
float aDB = avgDBA(), bDB = avgDBB();
drawCursor(cursorA, aDB, IM_COL32(255, 255, 0, 220), "A");
drawCursor(cursorB, bDB, IM_COL32(0, 200, 255, 220), "B");
drawCursorLabel(cursorA, aDB, IM_COL32(255, 255, 0, 220), "A", 0);
drawCursorLabel(cursorB, bDB, IM_COL32(0, 200, 255, 220), "B", cursorA.active ? 1 : 0);
// Delta display (two lines, column-aligned on '=')
if (showDelta && cursorA.active && cursorB.active) {