311 lines
14 KiB
C++
311 lines
14 KiB
C++
// Standalone tests for reasampler::vst::param_slider — no VST3, no REAPER, no framework.
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// Same fast assert loop as the sibling pure editor tests (capture_browser / keyboard_strip):
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// assert the S12/S15/S16 control-surface layout, toggle-segment split + hit-test, slider
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// value<->pixel mapping (round-trip + clamping + endpoints), and point->control routing.
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//
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// Covers: layoutControls stacking rows top-down with the label column + control column and the
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// inter-row gap; an empty list / degenerate panel yielding nothing; toggleSegmentRect splitting
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// a toggle into two tiling segments (last absorbs the remainder) + toggleSegmentHitTest;
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// sliderTrackRect insetting a half-handle at each end; sliderHandleRect at value 0/0.5/1 and
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// out-of-range clamping; valueAtPoint mapping x back to 0..1 (endpoints saturate) as the inverse
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// of the handle position; controlAtPoint routing a point to the right control id (toggle whole
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// area vs slider track vs knob circle) and MISSING in the label column, a row gap, and
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// off-panel. FA4 adds the radial KNOB: computeKnob inscribing the circle in its cell, the
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// circular hit-test, the arc angle<->value mapping (min at startDeg, max at endDeg, linear
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// midpoint; default = the 6->4 o'clock 300-degree sweep), the needle endpoint on the circle,
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// and the vertical-drag delta->value map (up = increase) with clamping at 0/1.
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#include "../src/vst/param_slider.h"
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#include <cstdio>
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#include <vector>
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using namespace reasampler::vst;
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static int g_fail = 0;
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#define CHECK(cond) do { if(!(cond)) { \
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std::printf("FAIL line %d: %s\n", __LINE__, #cond); ++g_fail; } } while(0)
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static bool approx(double a, double b) { return (a - b) < 1e-9 && (b - a) < 1e-9; }
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// --- layoutControls -----------------------------------------------------------
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static void testLayoutStacksRows() {
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const Rect panel{0, 100, 300, 400};
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std::vector<ControlDesc> ctl{
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{1, ControlKind::Toggle},
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{2, ControlKind::Slider},
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{3, ControlKind::Slider},
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};
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const std::vector<ControlRow> rows = layoutControls(panel, ctl);
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CHECK(rows.size() == 3);
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// Row 0 sits at the panel top; each subsequent row is one row-height + gap below.
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CHECK(rows[0].row.top == 100);
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CHECK(rows[0].row.bottom == 100 + kControlRowHeight);
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CHECK(rows[1].row.top == rows[0].row.bottom + kControlRowGap);
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CHECK(rows[2].row.top == rows[1].row.bottom + kControlRowGap);
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// Ids + kinds carried through in order.
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CHECK(rows[0].id == 1 && rows[0].kind == ControlKind::Toggle);
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CHECK(rows[1].id == 2 && rows[1].kind == ControlKind::Slider);
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// Label column then control column, contiguous, spanning the panel width.
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CHECK(rows[0].label.left == panel.left);
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CHECK(rows[0].control.left == rows[0].label.right);
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CHECK(rows[0].control.right == panel.right);
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CHECK(rows[0].label.width() == kControlLabelWidth);
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}
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static void testLayoutEmptyAndDegenerate() {
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CHECK(layoutControls(Rect{0, 0, 300, 300}, {}).empty());
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std::vector<ControlDesc> ctl{{1, ControlKind::Slider}};
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CHECK(layoutControls(Rect{0, 0, 0, 0}, ctl).empty());
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CHECK(layoutControls(Rect{0, 0, 300, 0}, ctl).empty());
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}
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static void testLayoutNarrowPanelClampsLabel() {
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// A panel narrower than 2*labelWidth clamps the label column to half so a control column
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// survives.
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const Rect panel{0, 0, 100, 200};
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const std::vector<ControlRow> rows = layoutControls(panel, {{1, ControlKind::Slider}});
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CHECK(rows.size() == 1);
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CHECK(rows[0].label.width() <= panel.width() / 2 + 1);
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CHECK(rows[0].control.width() > 0);
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}
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// --- toggle -------------------------------------------------------------------
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static void testToggleSegmentsTile() {
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const Rect control{100, 0, 300, 22}; // width 200
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const Rect s0 = toggleSegmentRect(control, 0);
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const Rect s1 = toggleSegmentRect(control, 1);
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CHECK(s0.left == 100 && s0.right == 200);
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CHECK(s1.left == 200 && s1.right == 300); // last absorbs remainder -> reaches control.right
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// Out of range.
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CHECK(toggleSegmentRect(control, 2).width() == 0);
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CHECK(toggleSegmentRect(control, -1).width() == 0);
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}
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static void testToggleSegmentRemainderInLast() {
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const Rect control{0, 0, 201, 22}; // odd width -> seg0 = 100, seg1 = 101 (absorbs remainder)
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CHECK(toggleSegmentRect(control, 0).width() == 100);
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CHECK(toggleSegmentRect(control, 1).right == 201);
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}
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static void testToggleHitTest() {
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const Rect control{100, 0, 300, 22};
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CHECK(toggleSegmentHitTest(control, 150, 10) == 0);
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CHECK(toggleSegmentHitTest(control, 250, 10) == 1);
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CHECK(toggleSegmentHitTest(control, 50, 10) == -1); // left of control
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CHECK(toggleSegmentHitTest(control, 150, 40) == -1); // below control
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}
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// --- slider -------------------------------------------------------------------
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static void testSliderTrackInsetsHalfHandle() {
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const Rect control{100, 0, 300, 22};
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const Rect track = sliderTrackRect(control);
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CHECK(track.left == control.left + kSliderHandleWidth / 2);
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CHECK(track.right == control.right - kSliderHandleWidth / 2);
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// A control too narrow for a handle yields an empty track.
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CHECK(sliderTrackRect(Rect{0, 0, kSliderHandleWidth - 1, 22}).width() == 0);
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}
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static void testSliderHandleAtEndpointsAndMid() {
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const Rect control{100, 0, 300, 22};
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const Rect track = sliderTrackRect(control);
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const int half = kSliderHandleWidth / 2;
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// Value 0 -> handle centered at track.left.
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const Rect h0 = sliderHandleRect(control, 0.0);
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CHECK(h0.left + half == track.left);
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// Value 1 -> handle centered at track.right.
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const Rect h1 = sliderHandleRect(control, 1.0);
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CHECK(h1.left + half == track.right);
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// Value 0.5 -> centered at the track middle.
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const Rect hm = sliderHandleRect(control, 0.5);
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CHECK(hm.left + half == track.left + track.width() / 2);
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}
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static void testSliderHandleClampsOutOfRange() {
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const Rect control{0, 0, 200, 22};
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CHECK(sliderHandleRect(control, -0.5).left == sliderHandleRect(control, 0.0).left);
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CHECK(sliderHandleRect(control, 5.0).left == sliderHandleRect(control, 1.0).left);
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}
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static void testValueAtPointEndpointsSaturate() {
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const Rect control{100, 0, 300, 22};
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const Rect track = sliderTrackRect(control);
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CHECK(approx(valueAtPoint(control, track.left - 20), 0.0));
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CHECK(approx(valueAtPoint(control, track.left), 0.0));
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CHECK(approx(valueAtPoint(control, track.right + 20), 1.0));
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CHECK(approx(valueAtPoint(control, track.right), 1.0));
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}
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static void testValueAtPointIsHandleInverse() {
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// Round-trip: a value -> handle center -> valueAtPoint recovers (within one pixel quantum).
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const Rect control{50, 0, 450, 22}; // wide track for pixel resolution
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const Rect track = sliderTrackRect(control);
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for (double v : {0.1, 0.25, 0.5, 0.75, 0.9}) {
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const Rect h = sliderHandleRect(control, v);
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const int centerX = h.left + kSliderHandleWidth / 2;
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const double back = valueAtPoint(control, centerX);
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CHECK(back >= v - 0.01 && back <= v + 0.01);
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CHECK(centerX >= track.left && centerX <= track.right);
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}
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}
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static void testValueAtPointDegenerateTrack() {
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CHECK(approx(valueAtPoint(Rect{0, 0, kSliderHandleWidth - 1, 22}, 5), 0.0));
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}
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// --- knob (FA4) -----------------------------------------------------------------
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static bool near(double a, double b, double tol) { return (a - b) < tol && (b - a) < tol; }
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static void testKnobGeometryInscribesCell() {
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// A 44x44 cell at (100,0): center (122,22), radius 22.
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const KnobGeometry g = computeKnob(Rect{100, 0, 144, 44});
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CHECK(approx(g.centerX, 122.0));
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CHECK(approx(g.centerY, 22.0));
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CHECK(approx(g.radius, 22.0));
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// A wide cell inscribes on the smaller (vertical) dimension.
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const KnobGeometry w = computeKnob(Rect{0, 0, 200, 22});
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CHECK(approx(w.radius, 11.0));
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CHECK(approx(w.centerX, 100.0));
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// Degenerate cells yield radius 0.
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CHECK(computeKnob(Rect{0, 0, 0, 22}).radius == 0.0);
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CHECK(computeKnob(Rect{0, 0, 22, 0}).radius == 0.0);
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}
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static void testKnobHitTestCircle() {
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const KnobGeometry g = computeKnob(Rect{100, 0, 144, 44}); // center (122,22), r 22
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CHECK(knobHitTest(g, 122, 22)); // center
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CHECK(knobHitTest(g, 122 + 22, 22)); // on the circle boundary (inclusive)
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CHECK(!knobHitTest(g, 122 + 22, 44)); // cell corner: inside the rect, outside the circle
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CHECK(!knobHitTest(g, 122, 45)); // just below the circle
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CHECK(!knobHitTest(KnobGeometry{}, 0, 0)); // degenerate knob hits nothing
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}
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static void testKnobDefaultArcIsSixToFourOClock() {
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const KnobArc arc; // default: 180 (6 o'clock) clockwise to 120 (4 o'clock)
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CHECK(approx(knobSweepDeg(arc), 300.0));
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CHECK(approx(knobValueAngleDeg(arc, 0.0), kKnobArcStartDeg)); // min at 6 o'clock
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CHECK(approx(knobValueAngleDeg(arc, 1.0), kKnobArcEndDeg)); // max at 4 o'clock
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// Midpoint: halfway around the clockwise sweep -> 180 + 150 = 330.
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CHECK(approx(knobValueAngleDeg(arc, 0.5), 330.0));
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// Out-of-range values clamp to the arc ends.
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CHECK(approx(knobValueAngleDeg(arc, -0.5), kKnobArcStartDeg));
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CHECK(approx(knobValueAngleDeg(arc, 1.5), kKnobArcEndDeg));
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}
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static void testKnobArcIsParameterized() {
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// A custom non-wrapping arc: 3 o'clock down to 9 o'clock through 6.
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const KnobArc arc{90.0, 270.0};
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CHECK(approx(knobSweepDeg(arc), 180.0));
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CHECK(approx(knobValueAngleDeg(arc, 0.0), 90.0));
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CHECK(approx(knobValueAngleDeg(arc, 0.5), 180.0));
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CHECK(approx(knobValueAngleDeg(arc, 1.0), 270.0));
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// Equal start/end means a full-circle sweep (end at-or-behind start wraps +360).
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CHECK(approx(knobSweepDeg(KnobArc{0.0, 0.0}), 360.0));
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}
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static void testKnobNeedlePointOnCircle() {
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const KnobGeometry g = computeKnob(Rect{100, 0, 144, 44}); // center (122,22), r 22
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// Default arc, value 0 -> 6 o'clock -> straight DOWN from the center (screen +y).
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const KnobPoint p6 = knobNeedlePoint(g, KnobArc{}, 0.0);
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CHECK(near(p6.x, 122.0, 1e-6) && near(p6.y, 44.0, 1e-6));
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// A 12 o'clock needle points straight UP; 3 o'clock points RIGHT.
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const KnobPoint p12 = knobNeedlePoint(g, KnobArc{0.0, 180.0}, 0.0);
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CHECK(near(p12.x, 122.0, 1e-6) && near(p12.y, 0.0, 1e-6));
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const KnobPoint p3 = knobNeedlePoint(g, KnobArc{0.0, 180.0}, 0.5);
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CHECK(near(p3.x, 144.0, 1e-6) && near(p3.y, 22.0, 1e-6));
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// Every needle endpoint sits ON the circle.
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for (double v : {0.0, 0.25, 0.5, 0.75, 1.0}) {
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const KnobPoint p = knobNeedlePoint(g, KnobArc{}, v);
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const double dx = p.x - g.centerX, dy = p.y - g.centerY;
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CHECK(near(dx * dx + dy * dy, g.radius * g.radius, 1e-6));
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}
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}
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static void testKnobDragUpIncreases() {
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// Up (negative dy) increases, down decreases, scaled by the drag range.
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CHECK(approx(knobDragValue(0.5, -32, 128), 0.75));
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CHECK(approx(knobDragValue(0.5, +32, 128), 0.25));
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// A full-range upward drag from 0 lands exactly at 1.
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CHECK(approx(knobDragValue(0.0, -128, 128), 1.0));
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// Default sensitivity applies when the range is omitted.
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CHECK(approx(knobDragValue(0.0, -kKnobDragRangePixels), 1.0));
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}
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static void testKnobDragClamps() {
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CHECK(approx(knobDragValue(0.9, -64, 128), 1.0)); // over-drag up clamps at 1
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CHECK(approx(knobDragValue(0.1, +64, 128), 0.0)); // over-drag down clamps at 0
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// The start value itself is clamped before the delta applies.
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CHECK(approx(knobDragValue(1.5, 0, 128), 1.0));
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CHECK(approx(knobDragValue(-0.5, 0, 128), 0.0));
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// A degenerate drag range yields the clamped start value.
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CHECK(approx(knobDragValue(0.7, -50, 0), 0.7));
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}
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// --- controlAtPoint routing ---------------------------------------------------
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static void testControlAtPointRoutes() {
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const Rect panel{0, 0, 300, 400};
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std::vector<ControlDesc> ctl{
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{10, ControlKind::Toggle},
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{20, ControlKind::Slider},
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};
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ctl.push_back({30, ControlKind::Knob});
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const std::vector<ControlRow> rows = layoutControls(panel, ctl);
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// A point in the toggle's control area routes to the toggle id.
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const Rect tctl = rows[0].control;
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CHECK(controlAtPoint(rows, (tctl.left + tctl.right) / 2, (tctl.top + tctl.bottom) / 2) == 10);
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// A point on the slider's track routes to the slider id.
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const Rect strack = sliderTrackRect(rows[1].control);
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CHECK(controlAtPoint(rows, (strack.left + strack.right) / 2,
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(strack.top + strack.bottom) / 2) == 20);
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// A point at the knob's center routes to the knob id; the control-rect corner (outside
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// the circle) is a miss.
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const KnobGeometry kg = computeKnob(rows[2].control);
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CHECK(controlAtPoint(rows, static_cast<int>(kg.centerX), static_cast<int>(kg.centerY)) == 30);
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CHECK(controlAtPoint(rows, rows[2].control.left + 1, rows[2].control.top + 1) == -1);
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}
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static void testControlAtPointMisses() {
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const Rect panel{0, 0, 300, 400};
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const std::vector<ControlRow> rows =
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layoutControls(panel, {{10, ControlKind::Toggle}, {20, ControlKind::Slider}});
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// The label column is not interactive.
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CHECK(controlAtPoint(rows, rows[0].label.left + 2, rows[0].label.top + 4) == -1);
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// The gap between rows is a miss.
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const int gapY = rows[0].row.bottom + kControlRowGap / 2;
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CHECK(controlAtPoint(rows, 200, gapY) == -1);
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// Off-panel below.
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CHECK(controlAtPoint(rows, 200, 5000) == -1);
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}
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int main() {
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testLayoutStacksRows();
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testLayoutEmptyAndDegenerate();
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testLayoutNarrowPanelClampsLabel();
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testToggleSegmentsTile();
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testToggleSegmentRemainderInLast();
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testToggleHitTest();
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testSliderTrackInsetsHalfHandle();
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testSliderHandleAtEndpointsAndMid();
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testSliderHandleClampsOutOfRange();
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testValueAtPointEndpointsSaturate();
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testValueAtPointIsHandleInverse();
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testValueAtPointDegenerateTrack();
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testKnobGeometryInscribesCell();
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testKnobHitTestCircle();
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testKnobDefaultArcIsSixToFourOClock();
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testKnobArcIsParameterized();
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testKnobNeedlePointOnCircle();
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testKnobDragUpIncreases();
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testKnobDragClamps();
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testControlAtPointRoutes();
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testControlAtPointMisses();
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if (g_fail == 0) std::printf("param_slider: all tests passed\n");
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return g_fail != 0;
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}
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