qt-creator/tests/manual/widgets/tracing/tst_manual_widgets_tracing.cpp

// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0

#include <QApplication>
#include <QQuickView>
#include <QQmlContext>
#include <QQmlEngine>

#include <tracing/timelinerenderer.h>
#include <tracing/timelineoverviewrenderer.h>
#include <tracing/timelinemodelaggregator.h>
#include <tracing/timelinetheme.h>
#include <tracing/timelineformattime.h>
#include <tracing/timelinezoomcontrol.h>

#include "../common/themeselector.h"

using namespace Timeline;

static const qint64 oneMs = 1000 * 1000; // in nanoseconds

class DummyModel : public Timeline::TimelineModel
{
public:
    DummyModel(TimelineModelAggregator *parent)
        : TimelineModel(parent)
    {
        setDisplayName("Dummy Category");
        setCollapsedRowCount(1);
        setExpandedRowCount(3);
        setTooltip("This is a tool tip"); // Tooltip on the title on the left
        setCategoryColor(Qt::yellow);
    }

    QRgb color(int index) const override
    {
        return QColor::fromHsl(index * 20, 96, 128).rgb(); // Red to green
    }

    // Called when a range gets selected, requests index of row which a range belongs to
    int expandedRow(int index) const override
    {
        return selectionId(index) % expandedRowCount(); // Distribute selections among rows
    }

    // Called when the category gets expanded
    QVariantList labels() const override
    {
        QVariantList result;

        QVariantMap element;
        element.insert(QLatin1String("description"), QVariant("Dummy sub category 1"));
        element.insert(QLatin1String("id"), 0);
        result << element;

        element.clear();
        element.insert(QLatin1String("description"), QVariant("Dummy sub category 2"));
        element.insert(QLatin1String("id"), 1);
        result << element;

        return result;
    }

    // Called when a range (or track) is selected
    QVariantMap details(int index) const override
    {
        QVariantMap result;
        result.insert(QLatin1String("displayName"),
                      QString::fromLatin1("Details for range %1").arg(index));
        result.insert(QLatin1String("Foo A"), QString::fromLatin1("Bar %1a").arg(index));
        result.insert(QLatin1String("Foo B"), QString::fromLatin1("Bar %1b").arg(index));
        return result;
    }

    float relativeHeight(int index) const override
    {
        return 1.0 - (index / 10.0); // Shrink over time
    }

    void populateData()
    {
        // One region per selection
        insert(oneMs *  20, oneMs * 20, 0);
        insert(oneMs * 100, oneMs * 30, 1);

        // Two regions in the same selection
        insert(oneMs *  40, oneMs * 20, 2);
        insert(oneMs * 120, oneMs * 30, 2);

        // Three regions in the same selection
        insert(oneMs *  60, oneMs * 30, 3);
        insert(oneMs * 140, oneMs * 20, 3);
        insert(oneMs * 170, oneMs * 20, 3);

        emit contentChanged();
    }
};

class TraceView : public QQuickView
{
public:
    TraceView(QWindow *parent = 0)
        : QQuickView(parent)
    {
        setResizeMode(QQuickView::SizeRootObjectToView);

        engine()->addImportPath(":/qt/qml/");
        TimelineTheme::setupTheme(engine());

        m_modelAggregator = new TimelineModelAggregator(this);
        m_model = new DummyModel(m_modelAggregator);
        m_model->populateData();
        m_modelAggregator->setModels({QVariant::fromValue(m_model)});
        rootContext()->setContextProperty(QLatin1String("timelineModelAggregator"),
                                          m_modelAggregator);

        m_zoomControl = new TimelineZoomControl(this);
        m_zoomControl->setTrace(0, oneMs * 1000); // Total timeline length
        rootContext()->setContextProperty("zoomControl", m_zoomControl);
        setSource(QUrl(QLatin1String("qrc:/qt/qml/QtCreator/Tracing/MainView.qml")));

        // Zoom onto first timeline third. Needs to be done after loading setSource.
        m_zoomControl->setRange(0, oneMs * 1000 / 3.0);
    }

   ~TraceView() override = default;

    DummyModel *m_model;
    TimelineModelAggregator *m_modelAggregator;
    TimelineZoomControl *m_zoomControl;
};

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);

    ManualTest::ThemeSelector::setTheme(":/themes/flat.creatortheme");

    auto view = new TraceView;
    view->resize(700, 300);
    view->show();

    return app.exec();
}