Qt 4.7: ControlStrip.cpp Example File (demos/embedded/anomaly/src/ControlStrip.cpp)

Qt Reference Documentation

# ControlStrip.cpp Example File

demos/embedded/anomaly/src/ControlStrip.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
     ** All rights reserved.
     ** Contact: Nokia Corporation (qt-info@nokia.com)
     **
     ** This file is part of the demos of the Qt Toolkit.
     **
     ** $QT_BEGIN_LICENSE:LGPL$
     ** GNU Lesser General Public License Usage
     ** This file may be used under the terms of the GNU Lesser 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 Nokia Qt 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:
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     **
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     ** Alternatively, this file may be used in accordance with the terms and
     ** conditions contained in a signed written agreement between you and Nokia.
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     ****************************************************************************/

     #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();
     }