OmaPhoto 1.0.0: the Linux port of Compositor
A layered image editor for Linux and Omarchy, ported from Compositor (github.com/robbietilton/Compositor), whose Swift source is its specification. It reads and writes Compositor's .comp projects. Packages for Ubuntu, Fedora and Arch come from the release workflow; scripts/install/ holds one install script per distribution family, and flake.nix serves NixOS. Co-Authored-By: Claude <noreply@anthropic.com>
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#include "BrushCanvasFixtures.h"
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#include "UI/GradientControls.h"
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#include "UI/LassoControls.h"
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#include "Rendering/TransformOverlay.h"
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#include <numbers>
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#include <QCheckBox>
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#include <QComboBox>
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#include <QPushButton>
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#include <QSlider>
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#include <QToolButton>
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// Swift's gradient on the canvas: drag, ends, keys, bar.
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namespace {
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void gradient(Canvas &shown)
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{
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shown.session.addBlankLayer();
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shown.session.selectTool(NavigationTool::gradient);
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shown.canvas->synchronizeDisplay();
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}
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QColor shownAt(Canvas &shown, int x, int y)
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{
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return shown.canvas->grab().toImage().pixelColor(x, y);
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}
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template <typename Widget> Widget &find(QWidget &parent, const char *name)
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{
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auto *found = parent.findChild<Widget *>(QString::fromLatin1(name));
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if (!found)
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throw std::runtime_error(name);
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return *found;
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}
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}
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class GradientCanvasTests : public QObject {
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Q_OBJECT
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private slots:
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void aDragDrawsAPendingGradientAndItsLine();
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void endsAreGrabbedWithinTenPoints();
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void shiftKeepsTheLineToFortyFiveDegrees();
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void escapeCancelsAndReturnApplies();
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void theOverlayDrawsTheLineAsSwift();
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void aFoldersPendingMaskClipsAtOnce();
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void theBarSetsTheGradient();
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void theSwatchShowsTheColoursOverChecks();
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};
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void GradientCanvasTests::aDragDrawsAPendingGradientAndItsLine()
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{
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Canvas shown;
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gradient(shown);
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const QColor ground = shownAt(shown, 200, 100);
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shown.drag(QPointF(50, 150), QPointF(350, 150));
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const std::optional<GradientEdit> &edit = shown.session.gradientEdit();
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QVERIFY(edit.has_value());
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QCOMPARE(edit.value().start, QPointF(50, 150));
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QCOMPARE(edit.value().end, QPointF(350, 150));
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QCOMPARE(shown.canvas->synchronizeDisplay(), false);
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// Black at the start, fading; the line and ends above.
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QCOMPARE(shownAt(shown, 40, 100), QColor(0, 0, 0));
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const QColor mid = shownAt(shown, 200, 100);
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QVERIFY2(std::abs(mid.red() - ground.red() / 2) <= 3, qPrintable(mid.name() + " " + ground.name()));
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// Each end: its colour, a white ring, a black rim.
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QCOMPARE(shownAt(shown, 50, 150), QColor(0, 0, 0));
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QCOMPARE(shownAt(shown, 50, 145), QColor(255, 255, 255));
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const QImage view = shown.canvas->grab().toImage();
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QVERIFY(std::min({view.pixelColor(50, 143).red(), view.pixelColor(50, 144).red()}) < 110);
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QCOMPARE(shownAt(shown, 350, 150), QColor(191, 191, 191));
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// The white line over the black one lightens its row.
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QVERIFY(shownAt(shown, 200, 150).red() > mid.red() + 40);
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// A click without a line leaves nothing pending.
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shown.session.cancelGradient();
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shown.click(QPointF(100, 100));
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QVERIFY(!shown.session.gradientEdit());
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}
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void GradientCanvasTests::endsAreGrabbedWithinTenPoints()
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{
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Canvas shown;
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gradient(shown);
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shown.drag(QPointF(50, 150), QPointF(350, 150));
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// Nine points from the end grabs it; the start stays.
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shown.drag(QPointF(359, 150), QPointF(300, 100));
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QCOMPARE(shown.session.gradientEdit().value().start, QPointF(50, 150));
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QCOMPARE(shown.session.gradientEdit().value().end, QPointF(300, 100));
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shown.drag(QPointF(52, 157), QPointF(80, 200));
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QCOMPARE(shown.session.gradientEdit().value().start, QPointF(80, 200));
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QCOMPARE(shown.session.gradientEdit().value().end, QPointF(300, 100));
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// Eleven points from either end starts a new line there.
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shown.drag(QPointF(80, 211), QPointF(150, 250));
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QCOMPARE(shown.session.gradientEdit().value().start, QPointF(80, 211));
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shown.drag(QPointF(161, 250), QPointF(250, 250));
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shown.drag(QPointF(311, 100), QPointF(390, 20));
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QCOMPARE(shown.session.gradientEdit().value().start, QPointF(311, 100));
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QCOMPARE(shown.session.gradientEdit().value().end, QPointF(390, 20));
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// A release lets go: hovering moves nothing.
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shown.hover(QPointF(200, 200));
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QCOMPARE(shown.session.gradientEdit().value().end, QPointF(390, 20));
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// Losing focus drops a drag under way.
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shown.canvas->setFocus();
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QTRY_VERIFY(shown.canvas->hasFocus());
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shown.press(QPointF(390, 20));
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QWidget other(&shown.window);
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other.setFocusPolicy(Qt::StrongFocus);
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other.show();
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other.setFocus();
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QTRY_VERIFY(!shown.canvas->hasFocus());
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shown.move(QPointF(200, 200));
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QCOMPARE(shown.session.gradientEdit().value().end, QPointF(390, 20));
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shown.release(QPointF(200, 200));
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}
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void GradientCanvasTests::shiftKeepsTheLineToFortyFiveDegrees()
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{
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Canvas shown;
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gradient(shown);
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shown.press(QPointF(100, 100));
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shown.move(QPointF(200, 130), Qt::ShiftModifier);
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const QPointF end = shown.session.gradientEdit().value().end;
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QCOMPARE(end.y(), 100.0);
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QCOMPARE(end.x(), 100 + std::hypot(100.0, 30.0));
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shown.move(QPointF(180, 170), Qt::ShiftModifier);
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const QPointF diagonal = shown.session.gradientEdit().value().end;
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QVERIFY(std::abs((diagonal.x() - 100) - (diagonal.y() - 100)) < 1e-9);
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shown.release(QPointF(180, 170), Qt::ShiftModifier);
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// The start snaps around the end the same way.
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shown.press(QPointF(100, 100));
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shown.move(QPointF(100 + 3, 250), Qt::ShiftModifier);
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const QPointF start = shown.session.gradientEdit().value().start, fixed = shown.session.gradientEdit().value().end;
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QVERIFY(start.x() < fixed.x() && std::abs(std::abs(start.x() - fixed.x()) - std::abs(start.y() - fixed.y())) < 1e-9);
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shown.release(QPointF(103, 250));
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}
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void GradientCanvasTests::escapeCancelsAndReturnApplies()
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{
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Canvas shown;
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gradient(shown);
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shown.canvas->setFocus();
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QTRY_VERIFY(shown.canvas->hasFocus());
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shown.drag(QPointF(50, 150), QPointF(350, 150));
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QTest::keyClick(shown.canvas, Qt::Key_Escape);
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QVERIFY(!shown.session.gradientEdit());
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const int count = shown.session.history.undoCount();
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shown.drag(QPointF(50, 150), QPointF(350, 150));
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QTest::keyClick(shown.canvas, Qt::Key_Return);
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QTRY_COMPARE(shown.session.history.undoCount(), count + 1);
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QVERIFY(!shown.session.gradientEdit());
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shown.drag(QPointF(50, 150), QPointF(350, 150));
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QTest::keyClick(shown.canvas, Qt::Key_Enter);
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QTRY_COMPARE(shown.session.history.undoCount(), count + 2);
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}
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void GradientCanvasTests::theOverlayDrawsTheLineAsSwift()
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{
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Canvas shown;
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QImage image = BrushRaster::context(60, 40, false);
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image.fill(QColor(90, 90, 90));
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shown.session.insert(ImportedImage(image, image, QStringLiteral("Block")));
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shown.session.selectTool(NavigationTool::gradient);
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const TransformOverlay overlay(shown.session);
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const auto drawn = [&] {
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QImage layer(400, 300, QImage::Format_ARGB32_Premultiplied);
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layer.fill(Qt::transparent);
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QPainter painter(&layer);
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overlay.draw(painter, shown.canvas->palette());
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return layer;
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};
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// A press alone has no line to draw.
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shown.session.beginGradient(QPointF(100, 150));
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QVERIFY(!overlay.gradientLine());
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shown.session.moveGradient(std::nullopt, QPointF(300, 150));
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// A three-point shade under the one-point white line.
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QVERIFY(qAlpha(drawn().pixel(200, 148)) > 40);
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QCOMPARE(qAlpha(drawn().pixel(200, 146)), 0);
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// The radial's dashed rim, at the line's length.
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GradientSettings radial = shown.session.gradientSettings();
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radial.shape = GradientShape::radial;
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shown.session.setGradientSettings(radial);
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shown.session.moveGradient(std::nullopt, QPointF(160, 150));
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const QImage rim = drawn();
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int dashes = 0;
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for (int step = 0; step < 160; ++step) {
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const double angle = (100 + step) * std::numbers::pi / 180;
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dashes += qAlpha(rim.pixel(int(100 + 60 * std::cos(angle)), int(150 + 60 * std::sin(angle)))) > 0;
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}
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QVERIFY2(dashes > 40 && dashes < 150, qPrintable(QString::number(dashes)));
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// Switched to Move, not yet applied: the line, no handles.
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shown.session.selectTool(NavigationTool::move);
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QVERIFY(shown.session.gradientEdit() && overlay.geometry());
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QCOMPARE(qAlpha(drawn().pixel(int(overlay.geometry().value().handles[0].x()), int(overlay.geometry().value().handles[0].y()))), 0);
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QTRY_VERIFY(!shown.session.gradientEdit());
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}
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void GradientCanvasTests::aFoldersPendingMaskClipsAtOnce()
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{
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Canvas shown;
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QImage image = BrushRaster::context(400, 300, false);
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image.fill(QColor(200, 30, 30));
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shown.session.insert(ImportedImage(image, image, QStringLiteral("Red")));
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shown.session.groupSelectedLayers();
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const QUuid folder = shown.session.activeLayerID().value();
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QVERIFY(shown.session.document().value().layers[size_t(indexOf(shown.session.document().value().layers, folder))].isGroup);
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shown.session.addLayerMask(true);
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shown.session.selectLayerTarget(folder, true);
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shown.session.selectTool(NavigationTool::gradient);
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GradientSettings settings = shown.session.gradientSettings();
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settings.style = GradientStyle::foregroundToBackground;
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shown.session.setGradientSettings(settings);
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shown.canvas->synchronizeDisplay();
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QCOMPARE(shownAt(shown, 20, 100), QColor(200, 30, 30));
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// Black to white across the folder's mask, still pending.
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shown.drag(QPointF(0, 150), QPointF(400, 150));
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QVERIFY(shown.session.gradientEdit().value().raster->isMask);
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// Over gray checks, red minus green measures the red shown.
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const auto red = [&](int x) {
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const QColor seen = shownAt(shown, x, 100);
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return seen.red() - seen.green();
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};
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const int mid = red(200);
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QVERIFY2(red(20) < 20 && red(380) > 150 && std::abs(mid - 85) <= 4, qPrintable(QString::number(mid)));
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// The step lands as it looked.
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shown.session.commitGradient();
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QTRY_VERIFY(!shown.session.gradientEdit());
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shown.canvas->synchronizeDisplay();
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QVERIFY(std::abs(red(200) - mid) <= 2);
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}
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void GradientCanvasTests::theBarSetsTheGradient()
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{
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EditorSession session;
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session.createDocument(40, 20, true);
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session.selectTool(NavigationTool::gradient);
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GradientControls bar(session);
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bar.show();
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QCOMPARE(bar.title->text(), QString("Gradient"));
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QStringList labels;
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for (const QLabel *label : bar.findChildren<QLabel *>())
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labels << label->text();
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labels.sort();
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QCOMPARE(labels, (QStringList{"%", "Gradient", "Mask", "Opacity"}));
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auto &linear = find<QToolButton>(bar, "gradientLinear"), &radial = find<QToolButton>(bar, "gradientRadial");
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QCOMPARE(radial.toolTip(), QString("Linear runs along the line; Radial spreads out from the start point"));
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QVERIFY(linear.isChecked());
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radial.click();
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QCOMPARE(session.gradientSettings().shape, GradientShape::radial);
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QVERIFY(radial.isChecked() && !linear.isChecked());
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linear.click();
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QCOMPARE(session.gradientSettings().shape, GradientShape::linear);
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QVERIFY(linear.isChecked() && !radial.isChecked());
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auto &style = find<QComboBox>(bar, "gradientStyle");
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QCOMPARE(style.count(), 2);
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QCOMPARE(style.itemText(0), QString("Foreground to Background"));
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QCOMPARE(style.itemText(1), QString("Foreground to Transparent"));
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QCOMPARE(style.currentIndex(), 1);
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style.setCurrentIndex(0);
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emit style.activated(0);
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QCOMPARE(session.gradientSettings().style, GradientStyle::foregroundToBackground);
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style.setCurrentIndex(1);
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emit style.activated(1);
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QCOMPARE(session.gradientSettings().style, GradientStyle::foregroundToTransparent);
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auto &reverse = find<QCheckBox>(bar, "gradientReverse");
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reverse.click();
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QVERIFY(session.gradientSettings().reversed && reverse.isChecked());
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reverse.click();
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QVERIFY(!session.gradientSettings().reversed);
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// The slider runs from 1% to 100% in thousandths.
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auto &slider = find<QSlider>(bar, "gradientOpacitySlider");
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QCOMPARE(slider.width(), 100);
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slider.setValue(0);
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QCOMPARE(session.gradientSettings().opacity, 0.01);
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slider.setValue(5000);
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QCOMPARE(session.gradientSettings().opacity, 1.0);
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slider.setValue(333);
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QCOMPARE(session.gradientSettings().opacity, 0.333);
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auto &field = find<SelectionAmountField>(bar, "gradientOpacity");
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QCOMPARE(field.text(), QString("33"));
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QCOMPARE(field.width(), 42);
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QCOMPARE(field.toolTip(), QString("Press 1–9 for 10–90%, 0 for 100%"));
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field.setFocus();
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field.selectAll();
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QTest::keyClicks(&field, "70");
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QTest::keyClick(&field, Qt::Key_Return);
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QCOMPARE(session.gradientSettings().opacity, 0.7);
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// The session's changes show without writing back.
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session.setGradientSettings(GradientSettings{GradientShape::radial, GradientStyle::foregroundToBackground, true, 0.12345});
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QVERIFY(radial.isChecked() && style.currentIndex() == 0 && reverse.isChecked());
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QCOMPARE(slider.value(), 123);
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QCOMPARE(field.text(), QString("12"));
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QCOMPARE(session.gradientSettings().opacity, 0.12345);
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session.setGradientSettings(GradientSettings{GradientShape::linear, GradientStyle::foregroundToTransparent, false, 0.5});
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QVERIFY(linear.isChecked() && style.currentIndex() == 1 && !reverse.isChecked());
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QCOMPARE(slider.value(), 500);
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// Apply and Cancel while pending, at the far end.
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auto &apply = find<QPushButton>(bar, "gradientApply"), &cancel = find<QPushButton>(bar, "gradientCancel");
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QVERIFY(!apply.isVisible() && !cancel.isVisible());
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session.beginGradient(QPointF(1, 1));
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session.moveGradient(std::nullopt, QPointF(30, 1));
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QVERIFY(apply.isVisible() && cancel.isVisible());
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bar.resize(bar.sizeHint().width() + 300, bar.height());
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QTRY_VERIFY(cancel.x() - field.geometry().right() > 250 && apply.x() > cancel.x());
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const int count = session.history.undoCount();
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cancel.click();
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QVERIFY(!session.gradientEdit());
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QCOMPARE(session.history.undoCount(), count);
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session.beginGradient(QPointF(1, 1));
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session.moveGradient(std::nullopt, QPointF(30, 1));
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apply.click();
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QTRY_COMPARE(session.history.undoCount(), count + 1);
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// The edit ends from the event loop, after its step.
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QTRY_VERIFY(!session.gradientEdit());
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// The note, in secondary text, on a mask.
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auto ¬e = find<QLabel>(bar, "gradientMaskNote");
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QVERIFY(!note.isVisible());
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QCOMPARE(note.foregroundRole(), QPalette::PlaceholderText);
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session.addLayerMask(true);
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QVERIFY(note.isVisible());
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session.setIsProjectBusy(true);
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QTRY_VERIFY(!bar.isEnabled());
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session.setIsProjectBusy(false);
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QVERIFY(bar.isEnabled());
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EditorSession empty;
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const GradientControls idle(empty);
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QVERIFY(!idle.isEnabled());
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}
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void GradientCanvasTests::theSwatchShowsTheColoursOverChecks()
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{
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EditorSession session;
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session.createDocument(40, 20, true);
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session.selectTool(NavigationTool::gradient);
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session.setForegroundColor(PaletteColor{1, 0, 0});
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GradientControls bar(session);
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QWidget &swatch = find<QWidget>(bar, "gradientSwatch");
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PaintSpy spy(swatch);
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bar.show();
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QTRY_VERIFY(spy.count > 0);
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QCOMPARE(swatch.size(), QSize(56, 18));
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const auto drawn = [&] {
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QImage image(56, 18, QImage::Format_ARGB32_Premultiplied);
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image.fill(Qt::transparent);
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swatch.render(&image, QPoint(), QRegion(), QWidget::DrawChildren);
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return image;
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};
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const QImage shown = drawn();
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// Red at the start, fading to clear over the checks.
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QVERIFY(shown.pixelColor(1, 9).red() > 240 && shown.pixelColor(1, 9).green() < 12);
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QVERIFY(std::abs(shown.pixelColor(28, 10).green() - 130) <= 4);
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QVERIFY(std::abs(shown.pixelColor(50, 6).green() - 230) <= 4);
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for (const int y : {2, 6, 10, 14, 16})
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QCOMPARE(shown.pixelColor(50, y).green() < 210, y != 6 && y != 14);
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// A half-black rim, its corners rounded and smooth.
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QVERIFY(shown.pixelColor(28, 0).green() < shown.pixelColor(28, 10).green() - 40);
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QVERIFY(qAlpha(shown.pixel(0, 0)) < 40);
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QVERIFY(qAlpha(shown.pixel(1, 0)) > 40 && qAlpha(shown.pixel(1, 0)) < 240);
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// Every change repaints it.
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QApplication::processEvents();
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spy.count = 0;
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session.setForegroundColor(PaletteColor{0, 0, 1});
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QTRY_VERIFY(spy.count > 0);
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QVERIFY(drawn().pixelColor(1, 9).blue() > 240);
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}
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QTEST_MAIN(GradientCanvasTests)
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#include "GradientCanvasTests.moc"
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