14.14: tool bars scroll when narrow

tests/ToolHeaderScrollTests.cpp

@@ -0,0 +1,105 @@
+#include "Document/EditorSession.h"
+#include "UI/BrushControls.h"
+#include "UI/GradientControls.h"
+#include "UI/LassoControls.h"
+#include <QPushButton>
+#include <QScrollBar>
+#include <QtTest>
+
+// Swift 1.4.7: narrow tool bars scroll their controls, never squeeze.
+namespace {
+std::unique_ptr<EditorSession> withLayer(NavigationTool tool)
+{
+    auto session = std::make_unique<EditorSession>();
+    session->createDocument(40, 20);
+    QImage pixels(40, 20, QImage::Format_RGBA8888_Premultiplied);
+    pixels.fill(Qt::white);
+    session->insert(ImportedImage(pixels, pixels, QStringLiteral("White")));
+    session->selectTool(tool);
+    return session;
+}
+
+// The control's place inside the scroll area's view, or none.
+bool inView(QScrollArea &area, QWidget &control)
+{
+    const QRect place(control.mapTo(area.viewport(), QPoint(0, 0)), control.size());
+    return area.viewport()->rect().contains(place);
+}
+
+// Too narrow a bar: its controls keep their size, scrolling.
+void scrolls(ToolHeaderBar &bar, const char *name, QWidget &last)
+{
+    bar.resize(440, bar.height());
+    bar.show();
+    QVERIFY(QTest::qWaitForWindowExposed(&bar));
+    auto &area = *bar.findChild<QScrollArea *>(QString::fromLatin1(name));
+    QVERIFY2(bar.minimumSizeHint().width() < 440, name);
+    QCOMPARE(bar.height(), 42);
+    QVERIFY2(area.widget()->width() >= area.widget()->minimumSizeHint().width(), name);
+    QVERIFY2(area.horizontalScrollBar()->maximum() > 0 && !area.horizontalScrollBar()->isVisible(), name);
+    QVERIFY2(!inView(area, last) && bar.title->isVisible(), name);
+    // A sideways wheel scrolls it; the last control comes in.
+    for (int notch = 0; notch < 40 && !inView(area, last); ++notch) {
+        const QPoint middle = area.viewport()->rect().center();
+        QWheelEvent wheel(middle, area.viewport()->mapToGlobal(middle), QPoint(), QPoint(-120, 0), Qt::NoButton, Qt::NoModifier, Qt::NoScrollPhase, false);
+        QApplication::sendEvent(area.viewport(), &wheel);
+    }
+    QVERIFY2(inView(area, last), name);
+    // Wide, nothing scrolls and the content starts at the edge.
+    bar.resize(2400, bar.height());
+    QTRY_COMPARE(area.horizontalScrollBar()->maximum(), 0);
+    QCOMPARE(area.widget()->layout()->itemAt(0)->widget()->mapTo(&area, QPoint(0, 0)).x(), 0);
+    // Packed at its own size: the room is after it.
+    QVERIFY2(last.mapTo(&area, QPoint(last.width(), 0)).x() < area.width() - 500, name);
+}
+}
+
+class ToolHeaderScrollTests : public QObject {
+    Q_OBJECT
+private slots:
+    void theBrushBarScrolls();
+    void theGradientBarScrollsAndKeepsItsButtons();
+    void theSelectionBarScrollsAndKeepsDeselect();
+};
+
+void ToolHeaderScrollTests::theBrushBarScrolls()
+{
+    const auto session = withLayer(NavigationTool::brush);
+    BrushControls bar(*session);
+    // The mask note scrolls with the controls, after them.
+    session->addMask();
+    QWidget &note = *bar.findChild<QWidget *>("brushMaskNote");
+    scrolls(bar, "brushScroll", note);
+    QVERIFY(note.isVisible() && note.parentWidget() == bar.findChild<QScrollArea *>("brushScroll")->widget());
+}
+
+void ToolHeaderScrollTests::theGradientBarScrollsAndKeepsItsButtons()
+{
+    const auto session = withLayer(NavigationTool::gradient);
+    GradientControls bar(*session);
+    session->beginGradient(QPointF(1, 1));
+    session->moveGradient(std::nullopt, QPointF(30, 1));
+    scrolls(bar, "gradientScroll", *bar.findChild<QWidget *>("gradientOpacity"));
+    // Cancel and Apply stay at the end, outside the scroll.
+    bar.resize(440, bar.height());
+    auto &apply = *bar.findChild<QPushButton *>("gradientApply");
+    QTRY_VERIFY(apply.isVisible() && apply.geometry().right() < 440 && apply.parentWidget() == &bar);
+}
+
+void ToolHeaderScrollTests::theSelectionBarScrollsAndKeepsDeselect()
+{
+    const auto session = withLayer(NavigationTool::marquee);
+    LassoControls bar(*session);
+    session->selectAll();
+    scrolls(bar, "selectionScroll", *bar.findChild<QWidget *>("selectionFeatherAmount"));
+    bar.resize(440, bar.height());
+    QPushButton *deselect = nullptr;
+    for (QPushButton *button : bar.findChildren<QPushButton *>())
+        if (button->text() == "Deselect")
+            deselect = button;
+    QVERIFY(deselect);
+    QTRY_VERIFY(deselect->isVisible() && deselect->geometry().right() < 440 && deselect->parentWidget() == &bar);
+}
+
+QTEST_MAIN(ToolHeaderScrollTests)
+#include "ToolHeaderScrollTests.moc"