qt-creator/src/plugins/qmlprofiler/qmlprofilereventview.cpp

/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of Qt Creator.
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
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** use the contact form at http://qt.digia.com/contact-us.
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** GNU Lesser General Public License Usage
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** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
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** rights.  These rights are described in the Digia Qt LGPL Exception
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****************************************************************************/

#include "qmlprofilereventview.h"

#include <QUrl>
#include <QHash>

#include <QStandardItem>
#include <QHeaderView>

#include <QApplication>
#include <QClipboard>

#include <QContextMenuEvent>
#include <QDebug>

#include <coreplugin/minisplitter.h>
#include <QVBoxLayout>
#include <QHBoxLayout>

#include "qmlprofilerviewmanager.h"
#include "qmlprofilertool.h"
#include <QMenu>

#include <utils/qtcassert.h>

using namespace QmlDebug;

namespace QmlProfiler {
namespace Internal {

struct Colors {
    Colors () {
        this->bindingLoopBackground = QColor("orange").lighter();
    }

    QColor bindingLoopBackground;
};

Q_GLOBAL_STATIC(Colors, colors)

////////////////////////////////////////////////////////////////////////////////////


////////////////////////////////////////////////////////////////////////////////////

class EventsViewItem : public QStandardItem
{
public:
    EventsViewItem(const QString &text) : QStandardItem(text) {}

    virtual bool operator<(const QStandardItem &other) const
    {
        if (data().type() == QVariant::String) {
            // first column
            if (column() == 0) {
                return data(FilenameRole).toString() == other.data(FilenameRole).toString() ?
                            data(LineRole).toInt() < other.data(LineRole).toInt() :
                            data(FilenameRole).toString() < other.data(FilenameRole).toString();
            } else {
                return data().toString().toLower() < other.data().toString().toLower();
            }
        }

        return data().toDouble() < other.data().toDouble();
    }
};

////////////////////////////////////////////////////////////////////////////////////

class QmlProfilerEventsWidget::QmlProfilerEventsWidgetPrivate
{
public:
    QmlProfilerEventsWidgetPrivate(QmlProfilerEventsWidget *qq):q(qq) {}
    ~QmlProfilerEventsWidgetPrivate() {}

    QmlProfilerEventsWidget *q;

    QmlProfilerTool *m_profilerTool;
    QmlProfilerViewManager *m_viewContainer;

    QmlProfilerEventsMainView *m_eventTree;
    QmlProfilerEventRelativesView *m_eventChildren;
    QmlProfilerEventRelativesView *m_eventParents;

    QmlProfilerEventsModelProxy *modelProxy;
    bool globalStats;
};

QmlProfilerEventsWidget::QmlProfilerEventsWidget(QWidget *parent,
                                                 QmlProfilerTool *profilerTool,
                                                 QmlProfilerViewManager *container,
                                                 QmlProfilerModelManager *profilerModelManager )

    : QWidget(parent), d(new QmlProfilerEventsWidgetPrivate(this))
{
    setObjectName(QLatin1String("QmlProfilerEventsView"));

    d->modelProxy = new QmlProfilerEventsModelProxy(profilerModelManager, this);
    connect(profilerModelManager, SIGNAL(stateChanged()),
            this, SLOT(profilerDataModelStateChanged()));

    d->m_eventTree = new QmlProfilerEventsMainView(this, d->modelProxy);
    connect(d->m_eventTree, SIGNAL(gotoSourceLocation(QString,int,int)), this, SIGNAL(gotoSourceLocation(QString,int,int)));
    connect(d->m_eventTree, SIGNAL(eventSelected(QString)), this, SIGNAL(eventSelectedByHash(QString)));

    d->m_eventChildren = new QmlProfilerEventRelativesView(
                profilerModelManager,
                new QmlProfilerEventChildrenModelProxy(profilerModelManager, d->modelProxy, this),
                this);
    d->m_eventParents = new QmlProfilerEventRelativesView(
                profilerModelManager,
                new QmlProfilerEventParentsModelProxy(profilerModelManager, d->modelProxy, this),
                this);
    connect(d->m_eventTree, SIGNAL(eventSelected(QString)), d->m_eventChildren, SLOT(displayEvent(QString)));
    connect(d->m_eventTree, SIGNAL(eventSelected(QString)), d->m_eventParents, SLOT(displayEvent(QString)));
    connect(d->m_eventChildren, SIGNAL(eventClicked(QString)), d->m_eventTree, SLOT(selectEvent(QString)));
    connect(d->m_eventParents, SIGNAL(eventClicked(QString)), d->m_eventTree, SLOT(selectEvent(QString)));

    // widget arrangement
    QVBoxLayout *groupLayout = new QVBoxLayout;
    groupLayout->setContentsMargins(0,0,0,0);
    groupLayout->setSpacing(0);

    Core::MiniSplitter *splitterVertical = new Core::MiniSplitter;
    splitterVertical->addWidget(d->m_eventTree);
    Core::MiniSplitter *splitterHorizontal = new Core::MiniSplitter;
    splitterHorizontal->addWidget(d->m_eventParents);
    splitterHorizontal->addWidget(d->m_eventChildren);
    splitterHorizontal->setOrientation(Qt::Horizontal);
    splitterVertical->addWidget(splitterHorizontal);
    splitterVertical->setOrientation(Qt::Vertical);
    splitterVertical->setStretchFactor(0,5);
    splitterVertical->setStretchFactor(1,2);
    groupLayout->addWidget(splitterVertical);
    setLayout(groupLayout);

    d->m_profilerTool = profilerTool;
    d->m_viewContainer = container;
    d->globalStats = true;
}

QmlProfilerEventsWidget::~QmlProfilerEventsWidget()
{
    delete d->modelProxy;
    delete d;
}

void QmlProfilerEventsWidget::profilerDataModelStateChanged()
{
}

void QmlProfilerEventsWidget::clear()
{
    d->m_eventTree->clear();
    d->m_eventChildren->clear();
    d->m_eventParents->clear();
}

void QmlProfilerEventsWidget::getStatisticsInRange(qint64 rangeStart, qint64 rangeEnd)
{
    d->modelProxy->limitToRange(rangeStart, rangeEnd);
    d->globalStats = (rangeStart == -1) && (rangeEnd == -1);
}

QModelIndex QmlProfilerEventsWidget::selectedItem() const
{
    return d->m_eventTree->selectedItem();
}

void QmlProfilerEventsWidget::contextMenuEvent(QContextMenuEvent *ev)
{
    QTC_ASSERT(d->m_viewContainer, return;);

    QMenu menu;
    QAction *copyRowAction = 0;
    QAction *copyTableAction = 0;
    QAction *showExtendedStatsAction = 0;
    QAction *getLocalStatsAction = 0;
    QAction *getGlobalStatsAction = 0;

    QPoint position = ev->globalPos();

    if (d->m_profilerTool) {
        QList <QAction *> commonActions = d->m_profilerTool->profilerContextMenuActions();
        foreach (QAction *act, commonActions) {
            menu.addAction(act);
        }
    }

    if (mouseOnTable(position)) {
        menu.addSeparator();
        if (selectedItem().isValid())
            copyRowAction = menu.addAction(tr("Copy Row"));
        copyTableAction = menu.addAction(tr("Copy Table"));

        showExtendedStatsAction = menu.addAction(tr("Extended Event Statistics"));
        showExtendedStatsAction->setCheckable(true);
        showExtendedStatsAction->setChecked(showExtendedStatistics());
    }

    menu.addSeparator();
    getLocalStatsAction = menu.addAction(tr("Limit Events Pane to Current Range"));
    if (!d->m_viewContainer->hasValidSelection())
        getLocalStatsAction->setEnabled(false);
    getGlobalStatsAction = menu.addAction(tr("Reset Events Pane"));
    if (hasGlobalStats())
        getGlobalStatsAction->setEnabled(false);

    QAction *selectedAction = menu.exec(position);

    if (selectedAction) {
        if (selectedAction == copyRowAction)
            copyRowToClipboard();
        if (selectedAction == copyTableAction)
            copyTableToClipboard();
        if (selectedAction == getLocalStatsAction) {
            getStatisticsInRange(d->m_viewContainer->selectionStart(),
                                 d->m_viewContainer->selectionEnd());
        }
        if (selectedAction == getGlobalStatsAction)
            getStatisticsInRange(-1, -1);
        if (selectedAction == showExtendedStatsAction)
            setShowExtendedStatistics(!showExtendedStatistics());
    }
}

void QmlProfilerEventsWidget::resizeEvent(QResizeEvent *event)
{
    QWidget::resizeEvent(event);
    emit resized();
}

bool QmlProfilerEventsWidget::mouseOnTable(const QPoint &position) const
{
    QPoint tableTopLeft = d->m_eventTree->mapToGlobal(QPoint(0,0));
    QPoint tableBottomRight = d->m_eventTree->mapToGlobal(QPoint(d->m_eventTree->width(), d->m_eventTree->height()));
    return (position.x() >= tableTopLeft.x() && position.x() <= tableBottomRight.x() && position.y() >= tableTopLeft.y() && position.y() <= tableBottomRight.y());
}

void QmlProfilerEventsWidget::copyTableToClipboard() const
{
    d->m_eventTree->copyTableToClipboard();
}

void QmlProfilerEventsWidget::copyRowToClipboard() const
{
    d->m_eventTree->copyRowToClipboard();
}

void QmlProfilerEventsWidget::updateSelectedEvent(const QString &eventHash) const
{
    if (d->m_eventTree->selectedEventHash() != eventHash)
        d->m_eventTree->selectEvent(eventHash);
}

void QmlProfilerEventsWidget::selectBySourceLocation(const QString &filename, int line, int column)
{
    d->m_eventTree->selectEventByLocation(filename, line, column);
}

bool QmlProfilerEventsWidget::hasGlobalStats() const
{
    return d->globalStats;
}

void QmlProfilerEventsWidget::setShowExtendedStatistics(bool show)
{
    d->m_eventTree->setShowExtendedStatistics(show);
}

bool QmlProfilerEventsWidget::showExtendedStatistics() const
{
    return d->m_eventTree->showExtendedStatistics();
}

////////////////////////////////////////////////////////////////////////////////////

class QmlProfilerEventsMainView::QmlProfilerEventsMainViewPrivate
{
public:
    QmlProfilerEventsMainViewPrivate(QmlProfilerEventsMainView *qq) : q(qq) {}

    int getFieldCount();

    QString textForItem(QStandardItem *item, bool recursive = false) const;


    QmlProfilerEventsMainView *q;

    QmlProfilerEventsModelProxy *modelProxy;
    QStandardItemModel *m_model;
    QList<bool> m_fieldShown;
    QHash<int, int> m_columnIndex; // maps field enum to column index
    bool m_showExtendedStatistics;
    int m_firstNumericColumn;
    bool m_preventSelectBounce;
};


////////////////////////////////////////////////////////////////////////////////////

QmlProfilerEventsMainView::QmlProfilerEventsMainView(QWidget *parent,
                                   QmlProfilerEventsModelProxy *modelProxy)
: QmlProfilerTreeView(parent), d(new QmlProfilerEventsMainViewPrivate(this))
{
    setObjectName(QLatin1String("QmlProfilerEventsTable"));

    setSortingEnabled(false);

    d->m_model = new QStandardItemModel(this);
    setModel(d->m_model);
    connect(this,SIGNAL(clicked(QModelIndex)), this,SLOT(jumpToItem(QModelIndex)));

    d->modelProxy = modelProxy;
    connect(d->modelProxy,SIGNAL(dataAvailable()), this, SLOT(buildModel()));
//    connect(d->modelProxy,SIGNAL(stateChanged()),
//            this,SLOT(profilerDataModelStateChanged()));
    d->m_firstNumericColumn = 0;
    d->m_preventSelectBounce = false;
    d->m_showExtendedStatistics = false;

    setFieldViewable(Name, true);
    setFieldViewable(Type, true);
    setFieldViewable(TimeInPercent, true);
    setFieldViewable(TotalTime, true);
    setFieldViewable(SelfTimeInPercent, false);
    setFieldViewable(SelfTime, false);
    setFieldViewable(CallCount, true);
    setFieldViewable(TimePerCall, true);
    setFieldViewable(MaxTime, true);
    setFieldViewable(MinTime, true);
    setFieldViewable(MedianTime, true);
    setFieldViewable(Details, true);

    buildModel();
}

QmlProfilerEventsMainView::~QmlProfilerEventsMainView()
{
    clear();
    //delete d->modelProxy;
    delete d->m_model;
    delete d;
}

void QmlProfilerEventsMainView::profilerDataModelStateChanged()
{
}

void QmlProfilerEventsMainView::setFieldViewable(Fields field, bool show)
{
    if (field < MaxFields) {
        int length = d->m_fieldShown.count();
        if (field >= length) {
            for (int i=length; i<MaxFields; i++)
                d->m_fieldShown << false;
        }
        d->m_fieldShown[field] = show;
    }
}


void QmlProfilerEventsMainView::setHeaderLabels()
{
    int fieldIndex = 0;
    d->m_firstNumericColumn = 0;

    d->m_columnIndex.clear();
    if (d->m_fieldShown[Name]) {
        d->m_columnIndex[Name] = fieldIndex;
        d->m_model->setHeaderData(fieldIndex++, Qt::Horizontal, QVariant(displayHeader(Location)));
        d->m_firstNumericColumn++;
    }
    if (d->m_fieldShown[Type]) {
        d->m_columnIndex[Type] = fieldIndex;
        d->m_model->setHeaderData(fieldIndex++, Qt::Horizontal, QVariant(displayHeader(Type)));
        d->m_firstNumericColumn++;
    }
    if (d->m_fieldShown[TimeInPercent]) {
        d->m_columnIndex[TimeInPercent] = fieldIndex;
        d->m_model->setHeaderData(fieldIndex++, Qt::Horizontal, QVariant(displayHeader(TimeInPercent)));
    }
    if (d->m_fieldShown[TotalTime]) {
        d->m_columnIndex[TotalTime] = fieldIndex;
        d->m_model->setHeaderData(fieldIndex++, Qt::Horizontal, QVariant(displayHeader(TotalTime)));
    }
    if (d->m_fieldShown[SelfTimeInPercent]) {
        d->m_columnIndex[Type] = fieldIndex;
        d->m_model->setHeaderData(fieldIndex++, Qt::Horizontal, QVariant(displayHeader(SelfTimeInPercent)));
    }
    if (d->m_fieldShown[SelfTime]) {
        d->m_columnIndex[SelfTime] = fieldIndex;
        d->m_model->setHeaderData(fieldIndex++, Qt::Horizontal, QVariant(displayHeader(SelfTime)));
    }
    if (d->m_fieldShown[CallCount]) {
        d->m_columnIndex[CallCount] = fieldIndex;
        d->m_model->setHeaderData(fieldIndex++, Qt::Horizontal, QVariant(displayHeader(CallCount)));
    }
    if (d->m_fieldShown[TimePerCall]) {
        d->m_columnIndex[TimePerCall] = fieldIndex;
        d->m_model->setHeaderData(fieldIndex++, Qt::Horizontal, QVariant(displayHeader(TimePerCall)));
    }
    if (d->m_fieldShown[MedianTime]) {
        d->m_columnIndex[MedianTime] = fieldIndex;
        d->m_model->setHeaderData(fieldIndex++, Qt::Horizontal, QVariant(displayHeader(MedianTime)));
    }
    if (d->m_fieldShown[MaxTime]) {
        d->m_columnIndex[MaxTime] = fieldIndex;
        d->m_model->setHeaderData(fieldIndex++, Qt::Horizontal, QVariant(displayHeader(MaxTime)));
    }
    if (d->m_fieldShown[MinTime]) {
        d->m_columnIndex[MinTime] = fieldIndex;
        d->m_model->setHeaderData(fieldIndex++, Qt::Horizontal, QVariant(displayHeader(MinTime)));
    }
    if (d->m_fieldShown[Details]) {
        d->m_columnIndex[Details] = fieldIndex;
        d->m_model->setHeaderData(fieldIndex++, Qt::Horizontal, QVariant(displayHeader(Details)));
    }
}

void QmlProfilerEventsMainView::setShowExtendedStatistics(bool show)
{
    // Not checking if already set because we don't want the first call to skip
    d->m_showExtendedStatistics = show;
    if (show) {
        if (d->m_fieldShown[MedianTime])
            showColumn(d->m_columnIndex[MedianTime]);
        if (d->m_fieldShown[MaxTime])
            showColumn(d->m_columnIndex[MaxTime]);
        if (d->m_fieldShown[MinTime])
            showColumn(d->m_columnIndex[MinTime]);
    } else{
        if (d->m_fieldShown[MedianTime])
            hideColumn(d->m_columnIndex[MedianTime]);
        if (d->m_fieldShown[MaxTime])
            hideColumn(d->m_columnIndex[MaxTime]);
        if (d->m_fieldShown[MinTime])
            hideColumn(d->m_columnIndex[MinTime]);
    }
}

bool QmlProfilerEventsMainView::showExtendedStatistics() const
{
    return d->m_showExtendedStatistics;
}

void QmlProfilerEventsMainView::clear()
{
    d->m_model->clear();
    d->m_model->setColumnCount(d->getFieldCount());

    setHeaderLabels();
    setSortingEnabled(false);
}

int QmlProfilerEventsMainView::QmlProfilerEventsMainViewPrivate::getFieldCount()
{
    int count = 0;
    for (int i=0; i < m_fieldShown.count(); ++i)
        if (m_fieldShown[i])
            count++;
    return count;
}

void QmlProfilerEventsMainView::buildModel()
{
    clear();
    parseModelProxy();
    setShowExtendedStatistics(d->m_showExtendedStatistics);

    setRootIsDecorated(false);
    setSortingEnabled(true);
    sortByColumn(d->m_firstNumericColumn,Qt::DescendingOrder);

    expandAll();
    if (d->m_fieldShown[Name])
        resizeColumnToContents(0);

    if (d->m_fieldShown[Type])
        resizeColumnToContents(d->m_fieldShown[Name]?1:0);
    collapseAll();
}

void QmlProfilerEventsMainView::parseModelProxy()
{
    const QList <QmlProfilerEventsModelProxy::QmlEventStats> eventList = d->modelProxy->getData();
    foreach (const QmlProfilerEventsModelProxy::QmlEventStats &event, eventList) {
        QStandardItem *parentItem = d->m_model->invisibleRootItem();
        QList<QStandardItem *> newRow;

        if (d->m_fieldShown[Name])
            newRow << new EventsViewItem(event.displayName);

        if (d->m_fieldShown[Type]) {
            QString typeString = QmlProfilerEventsMainView::nameForType(event.eventType);
            QString toolTipText;
            if (event.eventType == Binding) {
                if (event.bindingType == (int)OptimizedBinding) {
                    typeString = typeString + tr(" (Opt)");
                    toolTipText = tr("Binding is evaluated by the optimized engine.");
                } else if (event.bindingType == (int)V8Binding) {
                    toolTipText = tr("Binding not optimized (e.g. has side effects or assignments,\n"
                                     "references to elements in other files, loops, etc.)");

                }
            }
            newRow << new EventsViewItem(typeString);
            newRow.last()->setData(QVariant(typeString));
            if (!toolTipText.isEmpty())
                newRow.last()->setToolTip(toolTipText);
        }

        if (d->m_fieldShown[TimeInPercent]) {
            newRow << new EventsViewItem(QString::number(event.percentOfTime,'f',2)+QLatin1String(" %"));
            newRow.last()->setData(QVariant(event.percentOfTime));
        }

        if (d->m_fieldShown[TotalTime]) {
            newRow << new EventsViewItem(displayTime(event.duration));
            newRow.last()->setData(QVariant(event.duration));
        }

        if (d->m_fieldShown[CallCount]) {
            newRow << new EventsViewItem(QString::number(event.calls));
            newRow.last()->setData(QVariant(event.calls));
        }

        if (d->m_fieldShown[TimePerCall]) {
            newRow << new EventsViewItem(displayTime(event.timePerCall));
            newRow.last()->setData(QVariant(event.timePerCall));
        }

        if (d->m_fieldShown[MedianTime]) {
            newRow << new EventsViewItem(displayTime(event.medianTime));
            newRow.last()->setData(QVariant(event.medianTime));
        }

        if (d->m_fieldShown[MaxTime]) {
            newRow << new EventsViewItem(displayTime(event.maxTime));
            newRow.last()->setData(QVariant(event.maxTime));
        }

        if (d->m_fieldShown[MinTime]) {
            newRow << new EventsViewItem(displayTime(event.minTime));
            newRow.last()->setData(QVariant(event.minTime));
        }

        if (d->m_fieldShown[Details]) {
            newRow << new EventsViewItem(event.details);
            newRow.last()->setData(QVariant(event.details));
        }



        if (!newRow.isEmpty()) {
            // no edit
            foreach (QStandardItem *item, newRow)
                item->setEditable(false);

            // metadata
            newRow.at(0)->setData(QVariant(event.eventHashStr),EventHashStrRole);
            newRow.at(0)->setData(QVariant(event.location.filename),FilenameRole);
            newRow.at(0)->setData(QVariant(event.location.line),LineRole);
            newRow.at(0)->setData(QVariant(event.location.column),ColumnRole);

            if (event.isBindingLoop) {
                foreach (QStandardItem *item, newRow) {
                    item->setBackground(colors()->bindingLoopBackground);
                    item->setToolTip(tr("Binding loop detected."));
                }
            }

            // append
            parentItem->appendRow(newRow);
        }
    }
}

QString QmlProfilerEventsMainView::displayTime(double time)
{
    if (time < 1e6)
        return QString::number(time/1e3,'f',3) + trUtf8(" \xc2\xb5s");
    if (time < 1e9)
        return QString::number(time/1e6,'f',3) + tr(" ms");

    return QString::number(time/1e9,'f',3) + tr(" s");
}

QString QmlProfilerEventsMainView::nameForType(int typeNumber)
{
    switch (typeNumber) {
    case 0: return QmlProfilerEventsMainView::tr("Paint");
    case 1: return QmlProfilerEventsMainView::tr("Compile");
    case 2: return QmlProfilerEventsMainView::tr("Create");
    case 3: return QmlProfilerEventsMainView::tr("Binding");
    case 4: return QmlProfilerEventsMainView::tr("Signal");
    }
    return QString();
}

void QmlProfilerEventsMainView::getStatisticsInRange(qint64 rangeStart, qint64 rangeEnd)
{
    d->modelProxy->limitToRange(rangeStart, rangeEnd);
}

QString QmlProfilerEventsMainView::selectedEventHash() const
{
    QModelIndex index = selectedItem();
    if (!index.isValid())
        return QString();
    QStandardItem *item = d->m_model->item(index.row(), 0);
    return item->data(EventHashStrRole).toString();
}


void QmlProfilerEventsMainView::jumpToItem(const QModelIndex &index)
{
    if (d->m_preventSelectBounce)
        return;

    d->m_preventSelectBounce = true;
    QStandardItem *clickedItem = d->m_model->itemFromIndex(index);
    QStandardItem *infoItem;
    if (clickedItem->parent())
        infoItem = clickedItem->parent()->child(clickedItem->row(), 0);
    else
        infoItem = d->m_model->item(index.row(), 0);

    // show in editor
    int line = infoItem->data(LineRole).toInt();
    int column = infoItem->data(ColumnRole).toInt();
    QString fileName = infoItem->data(FilenameRole).toString();
    if (line!=-1 && !fileName.isEmpty())
        emit gotoSourceLocation(fileName, line, column);

    // show in callers/callees subwindow
    emit eventSelected(infoItem->data(EventHashStrRole).toString());

    d->m_preventSelectBounce = false;
}

void QmlProfilerEventsMainView::selectEvent(const QString &eventHash)
{
    for (int i=0; i<d->m_model->rowCount(); i++) {
        QStandardItem *infoItem = d->m_model->item(i, 0);
        if (infoItem->data(EventHashStrRole).toString() == eventHash) {
            setCurrentIndex(d->m_model->indexFromItem(infoItem));
            jumpToItem(currentIndex());
            return;
        }
    }
}

void QmlProfilerEventsMainView::selectEventByLocation(const QString &filename, int line, int column)
{
    if (d->m_preventSelectBounce)
        return;

    for (int i=0; i<d->m_model->rowCount(); i++) {
        QStandardItem *infoItem = d->m_model->item(i, 0);
        if (currentIndex() != d->m_model->indexFromItem(infoItem) &&
                infoItem->data(FilenameRole).toString() == filename &&
                infoItem->data(LineRole).toInt() == line &&
                (column == -1 ||
                infoItem->data(ColumnRole).toInt() == column)) {
            setCurrentIndex(d->m_model->indexFromItem(infoItem));
            jumpToItem(currentIndex());
            return;
        }
    }
}

QModelIndex QmlProfilerEventsMainView::selectedItem() const
{
    QModelIndexList sel = selectedIndexes();
    if (sel.isEmpty())
        return QModelIndex();
    else
        return sel.first();
}

QString QmlProfilerEventsMainView::QmlProfilerEventsMainViewPrivate::textForItem(QStandardItem *item, bool recursive) const
{
    QString str;

    if (recursive) {
        // indentation
        QStandardItem *itemParent = item->parent();
        while (itemParent) {
            str += QLatin1String("    ");
            itemParent = itemParent->parent();
        }
    }

    // item's data
    int colCount = m_model->columnCount();
    for (int j = 0; j < colCount; ++j) {
        QStandardItem *colItem = item->parent() ? item->parent()->child(item->row(),j) : m_model->item(item->row(),j);
        str += colItem->data(Qt::DisplayRole).toString();
        if (j < colCount-1) str += QLatin1Char('\t');
    }
    str += QLatin1Char('\n');

    // recursively print children
    if (recursive && item->child(0))
        for (int j = 0; j != item->rowCount(); j++)
            str += textForItem(item->child(j));

    return str;
}

void QmlProfilerEventsMainView::copyTableToClipboard() const
{
    QString str;
    // headers
    int columnCount = d->m_model->columnCount();
    for (int i = 0; i < columnCount; ++i) {
        str += d->m_model->headerData(i, Qt::Horizontal, Qt::DisplayRole).toString();
        if (i < columnCount - 1)
            str += QLatin1Char('\t');
        else
            str += QLatin1Char('\n');
    }
    // data
    int rowCount = d->m_model->rowCount();
    for (int i = 0; i != rowCount; ++i) {
        str += d->textForItem(d->m_model->item(i));
    }
    QClipboard *clipboard = QApplication::clipboard();
    clipboard->setText(str, QClipboard::Selection);
    clipboard->setText(str, QClipboard::Clipboard);
}

void QmlProfilerEventsMainView::copyRowToClipboard() const
{
    QString str;
    str = d->textForItem(d->m_model->itemFromIndex(selectedItem()), false);

    QClipboard *clipboard = QApplication::clipboard();
    clipboard->setText(str, QClipboard::Selection);
    clipboard->setText(str, QClipboard::Clipboard);
}

////////////////////////////////////////////////////////////////////////////////////

class QmlProfilerEventRelativesView::QmlProfilerEventParentsViewPrivate
{
public:
    QmlProfilerEventParentsViewPrivate(QmlProfilerEventRelativesView *qq):q(qq) {}
    ~QmlProfilerEventParentsViewPrivate() {}

    QmlProfilerEventRelativesModelProxy *modelProxy;

    QmlProfilerEventRelativesView *q;
};

QmlProfilerEventRelativesView::QmlProfilerEventRelativesView(QmlProfilerModelManager *modelManager, QmlProfilerEventRelativesModelProxy *modelProxy, QWidget *parent)
    : QmlProfilerTreeView(parent), d(new QmlProfilerEventParentsViewPrivate(this))
{
    Q_UNUSED(modelManager);
    setSortingEnabled(false);
    d->modelProxy = modelProxy;
    setModel(new QStandardItemModel(this));
    setRootIsDecorated(false);
    updateHeader();

    connect(this,SIGNAL(clicked(QModelIndex)), this,SLOT(jumpToItem(QModelIndex)));
}

QmlProfilerEventRelativesView::~QmlProfilerEventRelativesView()
{
    delete d;
}

void QmlProfilerEventRelativesView::displayEvent(const QString &eventHash)
{
    rebuildTree(d->modelProxy->getData(eventHash));

    updateHeader();
    resizeColumnToContents(0);
    setSortingEnabled(true);
    sortByColumn(2);
}

void QmlProfilerEventRelativesView::rebuildTree(QmlProfilerEventRelativesModelProxy::QmlEventRelativesMap eventMap)
{
    Q_ASSERT(treeModel());
    treeModel()->clear();

    QStandardItem *topLevelItem = treeModel()->invisibleRootItem();

    //foreach (const QmlProfilerEventParentsModelProxy::QmlEventParentData &event, eventMap.values()) {
    foreach (const QString &key, eventMap.keys()) {
        const QmlProfilerEventRelativesModelProxy::QmlEventRelativesData &event = eventMap[key];
        QList<QStandardItem *> newRow;

        // ToDo: here we were going to search for the data in the other modelproxy
        // maybe we should store the data in this proxy and get it here
        // no indirections at this level of abstraction!
        newRow << new EventsViewItem(event.displayName);
        newRow << new EventsViewItem(QmlProfilerEventsMainView::nameForType(event.eventType));
        newRow << new EventsViewItem(QmlProfilerEventsMainView::displayTime(event.duration));
        newRow << new EventsViewItem(QString::number(event.calls));
        newRow << new EventsViewItem(event.details);

//        newRow << new EventsViewItem(event->reference->displayName);
//        newRow << new EventsViewItem(QmlProfilerEventsMainView::nameForType(event->reference->eventType));
//        newRow << new EventsViewItem(QmlProfilerEventsMainView::displayTime(event->duration));
//        newRow << new EventsViewItem(QString::number(event->calls));
//        newRow << new EventsViewItem(event->reference->details);
        newRow.at(0)->setData(QVariant(key), EventHashStrRole);
        newRow.at(2)->setData(QVariant(event.duration));
        newRow.at(3)->setData(QVariant(event.calls));

        if (event.isBindingLoop) {
            foreach (QStandardItem *item, newRow) {
                item->setBackground(colors()->bindingLoopBackground);
                item->setToolTip(tr("Part of binding loop."));
            }
        }

        foreach (QStandardItem *item, newRow)
            item->setEditable(false);

        topLevelItem->appendRow(newRow);
    }
}

void QmlProfilerEventRelativesView::clear()
{
    if (treeModel()) {
        treeModel()->clear();
        updateHeader();
    }
}

void QmlProfilerEventRelativesView::updateHeader()
{
    bool calleesView = qobject_cast<QmlProfilerEventChildrenModelProxy *>(d->modelProxy) != 0;

    if (treeModel()) {
        treeModel()->setColumnCount(5);

        int columnIndex = 0;
        if (calleesView)
            treeModel()->setHeaderData(columnIndex++, Qt::Horizontal, QVariant(displayHeader(Callee)));
        else
            treeModel()->setHeaderData(columnIndex++, Qt::Horizontal, QVariant(displayHeader(Caller)));

        treeModel()->setHeaderData(columnIndex++, Qt::Horizontal, QVariant(displayHeader(Type)));

        treeModel()->setHeaderData(columnIndex++, Qt::Horizontal, QVariant(displayHeader(TotalTime)));

        treeModel()->setHeaderData(columnIndex++, Qt::Horizontal, QVariant(displayHeader(CallCount)));


        if (calleesView)
            treeModel()->setHeaderData(columnIndex++, Qt::Horizontal, QVariant(displayHeader(CalleeDescription)));
        else
            treeModel()->setHeaderData(columnIndex++, Qt::Horizontal, QVariant(displayHeader(CallerDescription)));
    }
}

QStandardItemModel *QmlProfilerEventRelativesView::treeModel()
{
    return qobject_cast<QStandardItemModel *>(model());
}

void QmlProfilerEventRelativesView::jumpToItem(const QModelIndex &index)
{
    if (treeModel()) {
        QStandardItem *infoItem = treeModel()->item(index.row(), 0);
        emit eventClicked(infoItem->data(EventHashStrRole).toString());
    }
}

} // namespace Internal
} // namespace QmlProfiler