From f0688de89cb82f6d3715bb03d7706fca4e6ab86f Mon Sep 17 00:00:00 2001 From: David Boddie Date: Tue, 13 Oct 2009 19:26:35 +0200 Subject: Doc: Moving the Image Gestures example. Reviewed-by: Trust Me --- examples/gestures/gestures.pro | 2 +- examples/gestures/imagegestures/imagegestures.pro | 16 ++ examples/gestures/imagegestures/imagewidget.cpp | 268 ++++++++++++++++++++++ examples/gestures/imagegestures/imagewidget.h | 98 ++++++++ examples/gestures/imagegestures/main.cpp | 59 +++++ examples/gestures/imagegestures/mainwidget.cpp | 56 +++++ examples/gestures/imagegestures/mainwidget.h | 63 +++++ examples/gestures/imageviewer/imageviewer.pro | 16 -- examples/gestures/imageviewer/imagewidget.cpp | 268 ---------------------- examples/gestures/imageviewer/imagewidget.h | 98 -------- examples/gestures/imageviewer/main.cpp | 59 ----- examples/gestures/imageviewer/mainwidget.cpp | 56 ----- examples/gestures/imageviewer/mainwidget.h | 63 ----- 13 files changed, 561 insertions(+), 561 deletions(-) create mode 100644 examples/gestures/imagegestures/imagegestures.pro create mode 100644 examples/gestures/imagegestures/imagewidget.cpp create mode 100644 examples/gestures/imagegestures/imagewidget.h create mode 100644 examples/gestures/imagegestures/main.cpp create mode 100644 examples/gestures/imagegestures/mainwidget.cpp create mode 100644 examples/gestures/imagegestures/mainwidget.h delete mode 100644 examples/gestures/imageviewer/imageviewer.pro delete mode 100644 examples/gestures/imageviewer/imagewidget.cpp delete mode 100644 examples/gestures/imageviewer/imagewidget.h delete mode 100644 examples/gestures/imageviewer/main.cpp delete mode 100644 examples/gestures/imageviewer/mainwidget.cpp delete mode 100644 examples/gestures/imageviewer/mainwidget.h diff --git a/examples/gestures/gestures.pro b/examples/gestures/gestures.pro index 09cd56a..e3978b6 100644 --- a/examples/gestures/gestures.pro +++ b/examples/gestures/gestures.pro @@ -1,7 +1,7 @@ TEMPLATE = \ subdirs SUBDIRS = \ - imageviewer + imagegestures # install target.path = $$[QT_INSTALL_EXAMPLES]/gestures diff --git a/examples/gestures/imagegestures/imagegestures.pro b/examples/gestures/imagegestures/imagegestures.pro new file mode 100644 index 0000000..7780ad9 --- /dev/null +++ b/examples/gestures/imagegestures/imagegestures.pro @@ -0,0 +1,16 @@ +HEADERS = imagewidget.h \ + mainwidget.h +SOURCES = imagewidget.cpp \ + main.cpp \ + mainwidget.cpp + +# install +target.path = $$[QT_INSTALL_EXAMPLES]/gestures/imageviewer +sources.files = $$SOURCES \ + $$HEADERS \ + $$RESOURCES \ + $$FORMS \ + imageviewer.pro +sources.path = $$[QT_INSTALL_EXAMPLES]/gestures/imageviewer +INSTALLS += target \ + sources diff --git a/examples/gestures/imagegestures/imagewidget.cpp b/examples/gestures/imagegestures/imagewidget.cpp new file mode 100644 index 0000000..c4a4e50 --- /dev/null +++ b/examples/gestures/imagegestures/imagewidget.cpp @@ -0,0 +1,268 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the examples of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the Technology Preview License Agreement accompanying +** this package. +** +** 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 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. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "imagewidget.h" + +#include + +ImageWidget::ImageWidget(QWidget *parent) + : QWidget(parent), + position(0), + horizontalOffset(0), + verticalOffset(0), + rotationAngle(0), + scaleFactor(1) + +{ + setObjectName("ImageWidget"); + setMinimumSize(QSize(100,100)); + + setAttribute(Qt::WA_PaintOnScreen); + setAttribute(Qt::WA_OpaquePaintEvent); + setAttribute(Qt::WA_NoSystemBackground); + +//! [enable gestures] + grabGesture(Qt::PanGesture); + grabGesture(Qt::PinchGesture); + grabGesture(Qt::SwipeGesture); +//! [enable gestures] +} + +//! [event handler] +bool ImageWidget::event(QEvent *event) +{ + if (event->type() == QEvent::Gesture) + return gestureEvent(static_cast(event)); + return QWidget::event(event); +} +//! [event handler] + +void ImageWidget::paintEvent(QPaintEvent*) +{ + QPainter p(this); + p.fillRect(rect(), Qt::white); + + float iw = currentImage.width(); + float ih = currentImage.height(); + float wh = height(); + float ww = width(); + + p.translate(ww/2, wh/2); + p.translate(horizontalOffset, verticalOffset); + p.rotate(rotationAngle); + p.scale(scaleFactor, scaleFactor); + p.translate(-iw/2, -ih/2); + p.drawImage(0, 0, currentImage); +} + +void ImageWidget::mouseDoubleClickEvent(QMouseEvent *) +{ + rotationAngle = 0; + scaleFactor = 1; + verticalOffset = 0; + horizontalOffset = 0; + update(); +} + +//! [gesture event handler] +bool ImageWidget::gestureEvent(QGestureEvent *event) +{ + if (QGesture *pan = event->gesture(Qt::PanGesture)) { + panTriggered(static_cast(pan)); + return true; + } else if (QGesture *pinch = event->gesture(Qt::PinchGesture)) { + pinchTriggered(static_cast(pinch)); + return true; + } else if (QGesture *swipe = event->gesture(Qt::SwipeGesture)) { + swipeTriggered(static_cast(swipe)); + return true; + } + return false; +} +//! [gesture event handler] + +void ImageWidget::panTriggered(QPanGesture *gesture) +{ +#ifndef QT_NO_CURSOR + switch (gesture->state()) { + case Qt::GestureStarted: + case Qt::GestureUpdated: + setCursor(Qt::SizeAllCursor); + break; + default: + setCursor(Qt::ArrowCursor); + } +#endif + QSizeF lastOffset = gesture->offset(); + horizontalOffset += lastOffset.width(); + verticalOffset += lastOffset.height(); + update(); +} + +void ImageWidget::pinchTriggered(QPinchGesture *gesture) +{ + QPinchGesture::WhatChanged whatChanged = gesture->whatChanged(); + if (whatChanged & QPinchGesture::RotationAngleChanged) { + qreal value = gesture->property("rotationAngle").toReal(); + qreal lastValue = gesture->property("lastRotationAngle").toReal(); + rotationAngle += value - lastValue; + } + if (whatChanged & QPinchGesture::ScaleFactorChanged) { + qreal value = gesture->property("scaleFactor").toReal(); + qreal lastValue = gesture->property("lastScaleFactor").toReal(); + scaleFactor += value - lastValue; + } + update(); +} + +//! [swipe function] +void ImageWidget::swipeTriggered(QSwipeGesture *gesture) +{ + if (gesture->horizontalDirection() == QSwipeGesture::Left + || gesture->verticalDirection() == QSwipeGesture::Up) + goPrevImage(); + else + goNextImage(); + update(); +} +//! [swipe function] + +void ImageWidget::resizeEvent(QResizeEvent*) +{ + update(); +} + +void ImageWidget::openDirectory(const QString &path) +{ + this->path = path; + QDir dir(path); + QStringList nameFilters; + nameFilters << "*.jpg" << "*.png"; + files = dir.entryList(nameFilters, QDir::Files|QDir::Readable, QDir::Name); + + position = 0; + goToImage(0); + update(); +} + +QImage ImageWidget::loadImage(const QString &fileName) +{ + QImageReader reader(fileName); + if (!reader.canRead()) { + qDebug() << fileName << ": can't load image"; + return QImage(); + } + + QImage image; + if (!reader.read(&image)) { + qDebug() << fileName << ": corrupted image"; + return QImage(); + } + return image; +} + +void ImageWidget::goNextImage() +{ + if (files.isEmpty()) + return; + + if (position < files.size()-1) { + ++position; + prevImage = currentImage; + currentImage = nextImage; + if (position+1 < files.size()) + nextImage = loadImage(path+QLatin1String("/")+files.at(position+1)); + else + nextImage = QImage(); + } + update(); +} + +void ImageWidget::goPrevImage() +{ + if (files.isEmpty()) + return; + + if (position > 0) { + --position; + nextImage = currentImage; + currentImage = prevImage; + if (position > 0) + prevImage = loadImage(path+QLatin1String("/")+files.at(position-1)); + else + prevImage = QImage(); + } + update(); +} + +void ImageWidget::goToImage(int index) +{ + if (files.isEmpty()) + return; + + if (index < 0 || index >= files.size()) { + qDebug() << "goToImage: invalid index: " << index; + return; + } + + if (index == position+1) { + goNextImage(); + return; + } + + if (position > 0 && index == position-1) { + goPrevImage(); + return; + } + + position = index; + + if (index > 0) + prevImage = loadImage(path+QLatin1String("/")+files.at(position-1)); + else + prevImage = QImage(); + currentImage = loadImage(path+QLatin1String("/")+files.at(position)); + if (position+1 < files.size()) + nextImage = loadImage(path+QLatin1String("/")+files.at(position+1)); + else + nextImage = QImage(); + update(); +} diff --git a/examples/gestures/imagegestures/imagewidget.h b/examples/gestures/imagegestures/imagewidget.h new file mode 100644 index 0000000..7b91fbf --- /dev/null +++ b/examples/gestures/imagegestures/imagewidget.h @@ -0,0 +1,98 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the examples of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the Technology Preview License Agreement accompanying +** this package. +** +** 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 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. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#ifndef IMAGEWIDGET_H +#define IMAGEWIDGET_H + +#include +#include +#include + +QT_BEGIN_NAMESPACE +class QGestureEvent; +class QPanGesture; +class QPinchGesture; +class QSwipeGesture; +QT_END_NAMESPACE + +class ImageWidget : public QWidget +{ + Q_OBJECT + +public: + ImageWidget(QWidget *parent = 0); + + void openDirectory(const QString &path); + +protected: + bool event(QEvent*); + bool gestureEvent(QGestureEvent*); + void paintEvent(QPaintEvent*); + void resizeEvent(QResizeEvent*); + void mouseDoubleClickEvent(QMouseEvent*); + +private: + void panTriggered(QPanGesture*); + void pinchTriggered(QPinchGesture*); + void swipeTriggered(QSwipeGesture*); + +private: + void updateImage(); + QImage loadImage(const QString &fileName); + void loadImage(); + void goNextImage(); + void goPrevImage(); + void goToImage(int index); + + QString path; + QStringList files; + int position; + + QImage prevImage, nextImage; + QImage currentImage; + + float horizontalOffset; + float verticalOffset; + float rotationAngle; + float scaleFactor; +}; + +#endif diff --git a/examples/gestures/imagegestures/main.cpp b/examples/gestures/imagegestures/main.cpp new file mode 100644 index 0000000..9c99f31 --- /dev/null +++ b/examples/gestures/imagegestures/main.cpp @@ -0,0 +1,59 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the examples of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the Technology Preview License Agreement accompanying +** this package. +** +** 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 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. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include + +#include "mainwidget.h" + +int main(int argc, char *argv[]) +{ + QApplication app(argc, argv); + + MainWidget w; + w.show(); + + if (QApplication::arguments().size() > 1) + w.openDirectory(QApplication::arguments().at(1)); + else + w.openDirectory(QFileDialog::getExistingDirectory(0, "Select image folder")); + + return app.exec(); +} diff --git a/examples/gestures/imagegestures/mainwidget.cpp b/examples/gestures/imagegestures/mainwidget.cpp new file mode 100644 index 0000000..51e9f1e --- /dev/null +++ b/examples/gestures/imagegestures/mainwidget.cpp @@ -0,0 +1,56 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the examples of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the Technology Preview License Agreement accompanying +** this package. +** +** 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 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. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "imagewidget.h" +#include "mainwidget.h" + +MainWidget::MainWidget(QWidget *parent) + : QMainWindow(parent) +{ + resize(400, 300); + imageWidget = new ImageWidget(this); + setCentralWidget(imageWidget); +} + +void MainWidget::openDirectory(const QString &path) +{ + imageWidget->openDirectory(path); +} diff --git a/examples/gestures/imagegestures/mainwidget.h b/examples/gestures/imagegestures/mainwidget.h new file mode 100644 index 0000000..1a99155 --- /dev/null +++ b/examples/gestures/imagegestures/mainwidget.h @@ -0,0 +1,63 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the examples of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the Technology Preview License Agreement accompanying +** this package. +** +** 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 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. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#ifndef MAINWIDGET_H +#define MAINWIDGET_H + +#include + +class MainWidget : public QMainWindow +{ + Q_OBJECT + +public: + MainWidget(QWidget *parent = 0); + +public slots: + void openDirectory(const QString &path); + +private: + bool loadImage(const QString &fileName); + + ImageWidget *imageWidget; +}; + +#endif diff --git a/examples/gestures/imageviewer/imageviewer.pro b/examples/gestures/imageviewer/imageviewer.pro deleted file mode 100644 index 7780ad9..0000000 --- a/examples/gestures/imageviewer/imageviewer.pro +++ /dev/null @@ -1,16 +0,0 @@ -HEADERS = imagewidget.h \ - mainwidget.h -SOURCES = imagewidget.cpp \ - main.cpp \ - mainwidget.cpp - -# install -target.path = $$[QT_INSTALL_EXAMPLES]/gestures/imageviewer -sources.files = $$SOURCES \ - $$HEADERS \ - $$RESOURCES \ - $$FORMS \ - imageviewer.pro -sources.path = $$[QT_INSTALL_EXAMPLES]/gestures/imageviewer -INSTALLS += target \ - sources diff --git a/examples/gestures/imageviewer/imagewidget.cpp b/examples/gestures/imageviewer/imagewidget.cpp deleted file mode 100644 index c4a4e50..0000000 --- a/examples/gestures/imageviewer/imagewidget.cpp +++ /dev/null @@ -1,268 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). -** All rights reserved. -** Contact: Nokia Corporation (qt-info@nokia.com) -** -** This file is part of the examples of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:LGPL$ -** No Commercial Usage -** This file contains pre-release code and may not be distributed. -** You may use this file in accordance with the terms and conditions -** contained in the Technology Preview License Agreement accompanying -** this package. -** -** 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 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. -** -** In addition, as a special exception, Nokia gives you certain additional -** rights. These rights are described in the Nokia Qt LGPL Exception -** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. -** -** If you have questions regarding the use of this file, please contact -** Nokia at qt-info@nokia.com. -** -** -** -** -** -** -** -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#include "imagewidget.h" - -#include - -ImageWidget::ImageWidget(QWidget *parent) - : QWidget(parent), - position(0), - horizontalOffset(0), - verticalOffset(0), - rotationAngle(0), - scaleFactor(1) - -{ - setObjectName("ImageWidget"); - setMinimumSize(QSize(100,100)); - - setAttribute(Qt::WA_PaintOnScreen); - setAttribute(Qt::WA_OpaquePaintEvent); - setAttribute(Qt::WA_NoSystemBackground); - -//! [enable gestures] - grabGesture(Qt::PanGesture); - grabGesture(Qt::PinchGesture); - grabGesture(Qt::SwipeGesture); -//! [enable gestures] -} - -//! [event handler] -bool ImageWidget::event(QEvent *event) -{ - if (event->type() == QEvent::Gesture) - return gestureEvent(static_cast(event)); - return QWidget::event(event); -} -//! [event handler] - -void ImageWidget::paintEvent(QPaintEvent*) -{ - QPainter p(this); - p.fillRect(rect(), Qt::white); - - float iw = currentImage.width(); - float ih = currentImage.height(); - float wh = height(); - float ww = width(); - - p.translate(ww/2, wh/2); - p.translate(horizontalOffset, verticalOffset); - p.rotate(rotationAngle); - p.scale(scaleFactor, scaleFactor); - p.translate(-iw/2, -ih/2); - p.drawImage(0, 0, currentImage); -} - -void ImageWidget::mouseDoubleClickEvent(QMouseEvent *) -{ - rotationAngle = 0; - scaleFactor = 1; - verticalOffset = 0; - horizontalOffset = 0; - update(); -} - -//! [gesture event handler] -bool ImageWidget::gestureEvent(QGestureEvent *event) -{ - if (QGesture *pan = event->gesture(Qt::PanGesture)) { - panTriggered(static_cast(pan)); - return true; - } else if (QGesture *pinch = event->gesture(Qt::PinchGesture)) { - pinchTriggered(static_cast(pinch)); - return true; - } else if (QGesture *swipe = event->gesture(Qt::SwipeGesture)) { - swipeTriggered(static_cast(swipe)); - return true; - } - return false; -} -//! [gesture event handler] - -void ImageWidget::panTriggered(QPanGesture *gesture) -{ -#ifndef QT_NO_CURSOR - switch (gesture->state()) { - case Qt::GestureStarted: - case Qt::GestureUpdated: - setCursor(Qt::SizeAllCursor); - break; - default: - setCursor(Qt::ArrowCursor); - } -#endif - QSizeF lastOffset = gesture->offset(); - horizontalOffset += lastOffset.width(); - verticalOffset += lastOffset.height(); - update(); -} - -void ImageWidget::pinchTriggered(QPinchGesture *gesture) -{ - QPinchGesture::WhatChanged whatChanged = gesture->whatChanged(); - if (whatChanged & QPinchGesture::RotationAngleChanged) { - qreal value = gesture->property("rotationAngle").toReal(); - qreal lastValue = gesture->property("lastRotationAngle").toReal(); - rotationAngle += value - lastValue; - } - if (whatChanged & QPinchGesture::ScaleFactorChanged) { - qreal value = gesture->property("scaleFactor").toReal(); - qreal lastValue = gesture->property("lastScaleFactor").toReal(); - scaleFactor += value - lastValue; - } - update(); -} - -//! [swipe function] -void ImageWidget::swipeTriggered(QSwipeGesture *gesture) -{ - if (gesture->horizontalDirection() == QSwipeGesture::Left - || gesture->verticalDirection() == QSwipeGesture::Up) - goPrevImage(); - else - goNextImage(); - update(); -} -//! [swipe function] - -void ImageWidget::resizeEvent(QResizeEvent*) -{ - update(); -} - -void ImageWidget::openDirectory(const QString &path) -{ - this->path = path; - QDir dir(path); - QStringList nameFilters; - nameFilters << "*.jpg" << "*.png"; - files = dir.entryList(nameFilters, QDir::Files|QDir::Readable, QDir::Name); - - position = 0; - goToImage(0); - update(); -} - -QImage ImageWidget::loadImage(const QString &fileName) -{ - QImageReader reader(fileName); - if (!reader.canRead()) { - qDebug() << fileName << ": can't load image"; - return QImage(); - } - - QImage image; - if (!reader.read(&image)) { - qDebug() << fileName << ": corrupted image"; - return QImage(); - } - return image; -} - -void ImageWidget::goNextImage() -{ - if (files.isEmpty()) - return; - - if (position < files.size()-1) { - ++position; - prevImage = currentImage; - currentImage = nextImage; - if (position+1 < files.size()) - nextImage = loadImage(path+QLatin1String("/")+files.at(position+1)); - else - nextImage = QImage(); - } - update(); -} - -void ImageWidget::goPrevImage() -{ - if (files.isEmpty()) - return; - - if (position > 0) { - --position; - nextImage = currentImage; - currentImage = prevImage; - if (position > 0) - prevImage = loadImage(path+QLatin1String("/")+files.at(position-1)); - else - prevImage = QImage(); - } - update(); -} - -void ImageWidget::goToImage(int index) -{ - if (files.isEmpty()) - return; - - if (index < 0 || index >= files.size()) { - qDebug() << "goToImage: invalid index: " << index; - return; - } - - if (index == position+1) { - goNextImage(); - return; - } - - if (position > 0 && index == position-1) { - goPrevImage(); - return; - } - - position = index; - - if (index > 0) - prevImage = loadImage(path+QLatin1String("/")+files.at(position-1)); - else - prevImage = QImage(); - currentImage = loadImage(path+QLatin1String("/")+files.at(position)); - if (position+1 < files.size()) - nextImage = loadImage(path+QLatin1String("/")+files.at(position+1)); - else - nextImage = QImage(); - update(); -} diff --git a/examples/gestures/imageviewer/imagewidget.h b/examples/gestures/imageviewer/imagewidget.h deleted file mode 100644 index 7b91fbf..0000000 --- a/examples/gestures/imageviewer/imagewidget.h +++ /dev/null @@ -1,98 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). -** All rights reserved. -** Contact: Nokia Corporation (qt-info@nokia.com) -** -** This file is part of the examples of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:LGPL$ -** No Commercial Usage -** This file contains pre-release code and may not be distributed. -** You may use this file in accordance with the terms and conditions -** contained in the Technology Preview License Agreement accompanying -** this package. -** -** 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 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. -** -** In addition, as a special exception, Nokia gives you certain additional -** rights. These rights are described in the Nokia Qt LGPL Exception -** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. -** -** If you have questions regarding the use of this file, please contact -** Nokia at qt-info@nokia.com. -** -** -** -** -** -** -** -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#ifndef IMAGEWIDGET_H -#define IMAGEWIDGET_H - -#include -#include -#include - -QT_BEGIN_NAMESPACE -class QGestureEvent; -class QPanGesture; -class QPinchGesture; -class QSwipeGesture; -QT_END_NAMESPACE - -class ImageWidget : public QWidget -{ - Q_OBJECT - -public: - ImageWidget(QWidget *parent = 0); - - void openDirectory(const QString &path); - -protected: - bool event(QEvent*); - bool gestureEvent(QGestureEvent*); - void paintEvent(QPaintEvent*); - void resizeEvent(QResizeEvent*); - void mouseDoubleClickEvent(QMouseEvent*); - -private: - void panTriggered(QPanGesture*); - void pinchTriggered(QPinchGesture*); - void swipeTriggered(QSwipeGesture*); - -private: - void updateImage(); - QImage loadImage(const QString &fileName); - void loadImage(); - void goNextImage(); - void goPrevImage(); - void goToImage(int index); - - QString path; - QStringList files; - int position; - - QImage prevImage, nextImage; - QImage currentImage; - - float horizontalOffset; - float verticalOffset; - float rotationAngle; - float scaleFactor; -}; - -#endif diff --git a/examples/gestures/imageviewer/main.cpp b/examples/gestures/imageviewer/main.cpp deleted file mode 100644 index 9c99f31..0000000 --- a/examples/gestures/imageviewer/main.cpp +++ /dev/null @@ -1,59 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). -** All rights reserved. -** Contact: Nokia Corporation (qt-info@nokia.com) -** -** This file is part of the examples of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:LGPL$ -** No Commercial Usage -** This file contains pre-release code and may not be distributed. -** You may use this file in accordance with the terms and conditions -** contained in the Technology Preview License Agreement accompanying -** this package. -** -** 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 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. -** -** In addition, as a special exception, Nokia gives you certain additional -** rights. These rights are described in the Nokia Qt LGPL Exception -** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. -** -** If you have questions regarding the use of this file, please contact -** Nokia at qt-info@nokia.com. -** -** -** -** -** -** -** -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#include - -#include "mainwidget.h" - -int main(int argc, char *argv[]) -{ - QApplication app(argc, argv); - - MainWidget w; - w.show(); - - if (QApplication::arguments().size() > 1) - w.openDirectory(QApplication::arguments().at(1)); - else - w.openDirectory(QFileDialog::getExistingDirectory(0, "Select image folder")); - - return app.exec(); -} diff --git a/examples/gestures/imageviewer/mainwidget.cpp b/examples/gestures/imageviewer/mainwidget.cpp deleted file mode 100644 index 51e9f1e..0000000 --- a/examples/gestures/imageviewer/mainwidget.cpp +++ /dev/null @@ -1,56 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). -** All rights reserved. -** Contact: Nokia Corporation (qt-info@nokia.com) -** -** This file is part of the examples of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:LGPL$ -** No Commercial Usage -** This file contains pre-release code and may not be distributed. -** You may use this file in accordance with the terms and conditions -** contained in the Technology Preview License Agreement accompanying -** this package. -** -** 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 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. -** -** In addition, as a special exception, Nokia gives you certain additional -** rights. These rights are described in the Nokia Qt LGPL Exception -** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. -** -** If you have questions regarding the use of this file, please contact -** Nokia at qt-info@nokia.com. -** -** -** -** -** -** -** -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#include "imagewidget.h" -#include "mainwidget.h" - -MainWidget::MainWidget(QWidget *parent) - : QMainWindow(parent) -{ - resize(400, 300); - imageWidget = new ImageWidget(this); - setCentralWidget(imageWidget); -} - -void MainWidget::openDirectory(const QString &path) -{ - imageWidget->openDirectory(path); -} diff --git a/examples/gestures/imageviewer/mainwidget.h b/examples/gestures/imageviewer/mainwidget.h deleted file mode 100644 index 1a99155..0000000 --- a/examples/gestures/imageviewer/mainwidget.h +++ /dev/null @@ -1,63 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). -** All rights reserved. -** Contact: Nokia Corporation (qt-info@nokia.com) -** -** This file is part of the examples of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:LGPL$ -** No Commercial Usage -** This file contains pre-release code and may not be distributed. -** You may use this file in accordance with the terms and conditions -** contained in the Technology Preview License Agreement accompanying -** this package. -** -** 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 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. -** -** In addition, as a special exception, Nokia gives you certain additional -** rights. These rights are described in the Nokia Qt LGPL Exception -** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. -** -** If you have questions regarding the use of this file, please contact -** Nokia at qt-info@nokia.com. -** -** -** -** -** -** -** -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#ifndef MAINWIDGET_H -#define MAINWIDGET_H - -#include - -class MainWidget : public QMainWindow -{ - Q_OBJECT - -public: - MainWidget(QWidget *parent = 0); - -public slots: - void openDirectory(const QString &path); - -private: - bool loadImage(const QString &fileName); - - ImageWidget *imageWidget; -}; - -#endif -- cgit v0.12