qt-creator/src/plugins/valgrind/callgrindtextmark.cpp

/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** 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
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
****************************************************************************/

#include "callgrindtextmark.h"

#include "callgrindhelper.h"

#include "callgrind/callgrinddatamodel.h"
#include "callgrind/callgrindfunction.h"

#include <QDebug>
#include <QPainter>

#include <utils/qtcassert.h>

using namespace Utils;
using namespace Valgrind::Internal;
using namespace Valgrind::Callgrind;

namespace Constants { const char CALLGRIND_TEXT_MARK_CATEGORY[] = "Callgrind.Textmark"; }

CallgrindTextMark::CallgrindTextMark(const QPersistentModelIndex &index,
                                     const FilePath &fileName, int lineNumber)
    : TextEditor::TextMark(fileName, lineNumber, Constants::CALLGRIND_TEXT_MARK_CATEGORY, 4.0)
    , m_modelIndex(index)
{
    setPriority(TextEditor::TextMark::HighPriority);
}

void CallgrindTextMark::paintIcon(QPainter *painter, const QRect &paintRect) const
{
    if (!m_modelIndex.isValid())
        return;

    bool ok;
    qreal costs = m_modelIndex.data(RelativeTotalCostRole).toReal(&ok);
    QTC_ASSERT(ok, return);
    QTC_ASSERT(costs >= 0.0 && costs <= 100.0, return);

    painter->save();

    // set up
    painter->setPen(Qt::black);

    // draw bar
    QRect fillRect = paintRect;
    fillRect.setWidth(paintRect.width() * costs);
    painter->fillRect(paintRect, Qt::white);
    painter->fillRect(fillRect, CallgrindHelper::colorForCostRatio(costs));
    painter->drawRect(paintRect);

    // draw text
    const QTextOption flags = Qt::AlignHCenter | Qt::AlignVCenter;
    const QString text = CallgrindHelper::toPercent(costs * 100.0f);

    // decrease font size if paint rect is too small (very unlikely, but may happen)
    QFont font = painter->font();
    QFontMetrics fm = QFontMetrics(font);
    while (fm.boundingRect(text).width() > paintRect.width()) {
        font.setPointSize(font.pointSize() - 1);
        fm = QFontMetrics(font);
    }
    painter->setFont(font);

    painter->drawText(paintRect, text, flags);

    painter->restore();
}

const Function *CallgrindTextMark::function() const
{
    if (!m_modelIndex.isValid())
        return nullptr;

    return m_modelIndex.data(DataModel::FunctionRole).value<const Function *>();
}