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Drop 1:2.5: on a grid of 10 it steps by 4, which misses 10, so texts on two elements 10 apart could never line up. Every remaining divisor is a whole number, which tst_textgrid checks. The divisor list and the snapping arithmetic move to the header-only textgrid.h so the toolbar menu, the preferences page and the test share them. The preferences page gets the same choice under Grille + Clavier; QETApp::textGridChanged keeps every editor's toolbar button in step. While element texts are dragged, the status bar names the text grid and says to release Shift and hold Ctrl for free placement -- Ctrl+Shift together is the pan shortcut. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01G2d2Zi8BfrYRPX88zhaoFG
81 lines
2.3 KiB
C++
81 lines
2.3 KiB
C++
#include <QtTest>
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#include "textgrid.h"
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class tst_textgrid : public QObject
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{
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Q_OBJECT
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private slots:
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// A label starting off the grid at (-13.3, 13.7), the case from
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// discussion #1020: the sideways jump shrinks with a finer text grid.
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void snapsToStep_data()
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{
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QTest::addColumn<int>("grid");
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QTest::addColumn<qreal>("divisor");
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QTest::addColumn<QPointF>("expected");
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QTest::newRow("off rounds to pixel") << 10 << 0.0 << QPointF(-13, 14);
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QTest::newRow("1:1 is the folio grid") << 10 << 1.0 << QPointF(-10, 10);
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QTest::newRow("1:2") << 10 << 2.0 << QPointF(-15, 15);
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QTest::newRow("1:5") << 10 << 5.0 << QPointF(-14, 14);
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QTest::newRow("1:10") << 10 << 10.0 << QPointF(-13, 14);
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QTest::newRow("grid 7, 1:2 steps 3.5") << 7 << 2.0 << QPointF(-14, 14);
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}
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void snapsToStep()
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{
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QFETCH(int, grid);
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QFETCH(qreal, divisor);
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QFETCH(QPointF, expected);
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const QPointF snapped = TextGrid::snap(QPointF(-13.3, 13.7), grid, grid, divisor);
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QCOMPARE(snapped.x(), expected.x());
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QCOMPARE(snapped.y(), expected.y());
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}
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// Every folio grid point is also a text grid point, so a text can
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// always sit exactly where an element or a wire does, and texts of
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// different elements can line up. This is why every divisor offered
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// is a whole number: 1:2.5 on a grid of 10 steps by 4, which misses 10.
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void folioGridPointsAreKept_data()
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{
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QTest::addColumn<int>("grid");
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QTest::addColumn<qreal>("divisor");
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for (int grid : {10, 7, 5})
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for (qreal divisor : TextGrid::divisors)
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if (divisor > 0)
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QTest::newRow(qPrintable(QStringLiteral("grid %1, %2")
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.arg(grid).arg(TextGrid::ratioLabel(divisor))))
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<< grid << divisor;
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}
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void folioGridPointsAreKept()
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{
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QFETCH(int, grid);
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QFETCH(qreal, divisor);
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for (int k = -20; k <= 20; ++k) {
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const QPointF on_grid(k * grid, -k * grid);
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QCOMPARE(TextGrid::snap(on_grid, grid, grid, divisor), on_grid);
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}
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}
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// Separate X and Y grid sizes are honoured independently.
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void usesEachAxisGrid()
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{
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QCOMPARE(TextGrid::snap(QPointF(13, 13), 10, 20, 2), QPointF(15, 10));
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}
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void ratioLabel()
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{
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QCOMPARE(TextGrid::ratioLabel(2), QStringLiteral("1:2"));
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QCOMPARE(TextGrid::ratioLabel(10), QStringLiteral("1:10"));
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}
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};
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QTEST_GUILESS_MAIN(tst_textgrid)
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#include "tst_textgrid.moc"
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