40a54bf565
Examples should demonstrate best practice, and we can use the keyword directly nowadays. Change-Id: I1f122e5caceca17290757ffbaf3d660e7daa9ae4 Reviewed-by: Topi Reiniö <topi.reinio@theqtcompany.com>
113 lines
3.7 KiB
C++
113 lines
3.7 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2016 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of the examples of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** BSD License Usage
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** Alternatively, you may use this file under the terms of the BSD license
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** as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the name of The Qt Company Ltd nor the names of its
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** contributors may be used to endorse or promote products derived
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** from this software without specific prior written permission.
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**
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef IMAGEWIDGET_H
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#define IMAGEWIDGET_H
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#include <QWidget>
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#include <QImage>
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#include <QtWidgets>
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QT_BEGIN_NAMESPACE
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class QGestureEvent;
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class QPanGesture;
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class QPinchGesture;
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class QSwipeGesture;
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QT_END_NAMESPACE
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Q_DECLARE_LOGGING_CATEGORY(lcExample)
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//! [class definition begin]
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class ImageWidget : public QWidget
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{
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Q_OBJECT
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public:
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ImageWidget(QWidget *parent = 0);
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void openDirectory(const QString &path);
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void grabGestures(const QList<Qt::GestureType> &gestures);
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protected:
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bool event(QEvent *event) override;
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void paintEvent(QPaintEvent *event) override;
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void resizeEvent(QResizeEvent *event) override;
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void mouseDoubleClickEvent(QMouseEvent *event) override;
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private:
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bool gestureEvent(QGestureEvent *event);
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void panTriggered(QPanGesture*);
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void pinchTriggered(QPinchGesture*);
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void swipeTriggered(QSwipeGesture*);
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//! [class definition begin]
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QImage loadImage(const QString &fileName);
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void loadImage();
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void goNextImage();
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void goPrevImage();
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void goToImage(int index);
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QString path;
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QStringList files;
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int position;
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QImage prevImage, nextImage;
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QImage currentImage;
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qreal horizontalOffset;
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qreal verticalOffset;
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qreal rotationAngle;
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qreal scaleFactor;
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qreal currentStepScaleFactor;
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//! [class definition end]
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};
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//! [class definition end]
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#endif
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