Qt 4.8: TitleBar.cpp Example File (demos/embedded/anomaly/src/TitleBar.cpp)

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# TitleBar.cpp Example File

demos/embedded/anomaly/src/TitleBar.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2015 The Qt Company Ltd.
     ** Contact: http://www.qt.io/licensing/
     **
     ** This file is part of the demos of the Qt Toolkit.
     **
     ** $QT_BEGIN_LICENSE:LGPL$
     ** Commercial License Usage
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     ** accordance with the commercial license agreement provided with the
     ** Software or, alternatively, in accordance with the terms contained in
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     **
     ** GNU Lesser General Public License Usage
     ** Alternatively, this file may be used under the terms of the GNU Lesser
     ** General Public License version 2.1 or version 3 as published by the Free
     ** Software Foundation and appearing in the file LICENSE.LGPLv21 and
     ** LICENSE.LGPLv3 included in the packaging of this file. Please review the
     ** following information to ensure the GNU Lesser General Public License
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     ** rights. These rights are described in The Qt Company LGPL Exception
     ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
     **
     ** GNU General Public License Usage
     ** Alternatively, this file may be used under the terms of the GNU
     ** General Public License version 3.0 as published by the Free Software
     ** Foundation and appearing in the file LICENSE.GPL included in the
     ** packaging of this file.  Please review the following information to
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     ****************************************************************************/

     #include "TitleBar.h"

     #include <QtCore>
     #include <QtGui>

     TitleBar::TitleBar(QWidget *parent)
         : QWidget(parent)
         , m_progress(0)
     {
         setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Minimum);
     }

     void TitleBar::setHost(const QString &host)
     {
         m_host = host;
         update();
     }

     void TitleBar::setTitle(const QString &title)
     {
         m_title = title;
         update();
     }

     void TitleBar::setProgress(int percent)
     {
         m_progress = percent;
         update();
     }

     QSize TitleBar::sizeHint() const
     {
         return minimumSizeHint();
     }

     QSize TitleBar::minimumSizeHint() const
     {
         QFontMetrics fm = fontMetrics();
         return QSize(100, fm.height());
     }

     void TitleBar::paintEvent(QPaintEvent *event)
     {
         QString title = m_host;
         if (!m_title.isEmpty())
             title.append(": ").append(m_title);

         QPalette pal = palette();
         QPainter p(this);
         p.fillRect(event->rect(), pal.color(QPalette::Highlight));

         if (m_progress > 0) {

             QRect box = rect();
             box.setLeft(16);
             box.setWidth(width() - box.left() - 110);

             p.setPen(pal.color(QPalette::HighlightedText));
             p.setOpacity(0.8);
             p.drawText(box, Qt::AlignLeft + Qt::AlignVCenter, title);

             int x = width() - 100 - 5;
             int y = 1;
             int h = height() - 4;

             p.setOpacity(1.0);
             p.setBrush(Qt::NoBrush);
             p.setPen(pal.color(QPalette::HighlightedText));
             p.drawRect(x, y, 100, h);
             p.setPen(Qt::NoPen);
             p.setBrush(pal.color(QPalette::HighlightedText));
             p.drawRect(x, y, m_progress, h);
         } else {

             QRect box = rect();
             box.setLeft(16);
             box.setWidth(width() - box.left() - 5);
             p.setPen(pal.color(QPalette::HighlightedText));
             p.drawText(box, Qt::AlignLeft + Qt::AlignVCenter, title);
         }

         p.end();
     }