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

Qt Reference Documentation

- Qt 4.8
- ALL VERSIONS

- A
- A
- A
- Print

# ControlStrip.cpp Example File

demos/embedded/anomaly/src/ControlStrip.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
     ** 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 http://www.qt.io/terms-conditions. For further
     ** information use the contact form at http://www.qt.io/contact-us.
     **
     ** 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
     ** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
     ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
     **
     ** As a special exception, The Qt Company gives you certain additional
     ** 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
     ** ensure the GNU General Public License version 3.0 requirements will be
     ** met: http://www.gnu.org/copyleft/gpl.html.
     **
     ** $QT_END_LICENSE$
     **
     ****************************************************************************/

     #include "ControlStrip.h"

     #include <QtCore>
     #include <QtGui>

     ControlStrip::ControlStrip(QWidget *parent)
         : QWidget(parent)
     {
         menuPixmap.load(":/images/edit-find.png");
         backPixmap.load(":/images/go-previous.png");
         forwardPixmap.load(":/images/go-next.png");
         closePixmap.load(":/images/button-close.png");
     }

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

     QSize ControlStrip::minimumSizeHint() const
     {
         return QSize(320, 48);
     }

     void ControlStrip::mousePressEvent(QMouseEvent *event)
     {
         int h = height();
         int spacing = qMin(h, (width() - h * 4) / 3);
         int x = event->pos().x();

         if (x < h) {
             emit menuClicked();
             event->accept();
             return;
         }

         if (x > width() - h) {
             emit closeClicked();
             event->accept();
             return;
         }

         if ((x < width() - (h + spacing)) && (x > width() - (h * 2 + spacing))) {
             emit forwardClicked();
             event->accept();
             return;
         }

         if ((x < width() - (h * 2 + spacing * 2)) && (x > width() - (h * 3 + spacing * 2))) {
             emit backClicked();
             event->accept();
             return;
         }
     }

     void ControlStrip::paintEvent(QPaintEvent *event)
     {
         int h = height();
         int spacing = qMin(h, (width() - h * 4) / 3);
         int s = (height() - menuPixmap.height()) / 2;

         QPainter p(this);
         p.fillRect(event->rect(), QColor(32, 32, 32, 192));
         p.setCompositionMode(QPainter::CompositionMode_SourceOver);
         p.drawPixmap(s, s, menuPixmap);
         p.drawPixmap(width() - h + s, s, closePixmap);
         p.drawPixmap(width() - (h * 2 + spacing) + s, s, forwardPixmap);
         p.drawPixmap(width() - (h * 3 + spacing * 2) + s, s, backPixmap);

         p.end();
     }