diff options
Diffstat (limited to 'src/svgwidgets/qsvgwidget.cpp')
| -rw-r--r-- | src/svgwidgets/qsvgwidget.cpp | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/src/svgwidgets/qsvgwidget.cpp b/src/svgwidgets/qsvgwidget.cpp new file mode 100644 index 0000000..6c80be1 --- /dev/null +++ b/src/svgwidgets/qsvgwidget.cpp @@ -0,0 +1,172 @@ +/**************************************************************************** +** +** Copyright (C) 2020 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the Qt SVG module 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 https://www.qt.io/terms-conditions. For further +** information use the contact form at https://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 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qsvgwidget.h" + +#include <qsvgrenderer.h> + +#include "qstyleoption.h" +#include "qpainter.h" +#include <QtWidgets/private/qwidget_p.h> + +QT_BEGIN_NAMESPACE + +/*! + \class QSvgWidget + \inmodule QtSvg + \ingroup painting + + \brief The QSvgWidget class provides a widget that is used to display the contents of + Scalable Vector Graphics (SVG) files. + \since 4.1 + + This class enables developers to display SVG drawings alongside standard widgets, and + is used in much the same way as QLabel is used for displaying text and bitmap images. + + Since QSvgWidget is a subclass of QWidget, SVG drawings are rendered using the properties + of the display. More control can be exercised over the rendering process with the + QSvgRenderer class, as this can be used to paint onto other paint devices, such as QImage + and QGLWidget. The renderer used by the widget can be obtained with the renderer() + function. + + Each QSvgWidget can be constructed with the file name of a SVG file, or they can be + constructed without a specific file to render and one can be supplied later. The load() + functions provide two different ways to load an SVG file: they accept either the file name + of an SVG file or a QByteArray containing the serialized XML representation of an SVG file. + + By default, the widget provides a size hint to reflect the size of the drawing that it + displays. If no data has been loaded, the widget provides the default QWidget size hint. + Subclass this class and reimplement sizeHint() if you need to customize this behavior. + + \sa QSvgRenderer, {Qt SVG C++ Classes}, QPicture +*/ + +class QSvgWidgetPrivate : public QWidgetPrivate +{ + Q_DECLARE_PUBLIC(QSvgWidget) +public: + QSvgRenderer *renderer; +}; + +/*! + Constructs a new SVG display widget with the given \a parent. +*/ +QSvgWidget::QSvgWidget(QWidget *parent) + : QWidget(*new QSvgWidgetPrivate, parent, {}) +{ + d_func()->renderer = new QSvgRenderer(this); + QObject::connect(d_func()->renderer, SIGNAL(repaintNeeded()), + this, SLOT(update())); +} + +/*! + Constructs a new SVG display widget with the given \a parent and loads the contents + of the specified \a file. +*/ +QSvgWidget::QSvgWidget(const QString &file, QWidget *parent) + : QWidget(*new QSvgWidgetPrivate, parent, {}) +{ + d_func()->renderer = new QSvgRenderer(file, this); + QObject::connect(d_func()->renderer, SIGNAL(repaintNeeded()), + this, SLOT(update())); +} + +/*! + Destroys the widget. +*/ +QSvgWidget::~QSvgWidget() +{ + +} + +/*! + Returns the renderer used to display the contents of the widget. +*/ +QSvgRenderer * QSvgWidget::renderer() const +{ + Q_D(const QSvgWidget); + return d->renderer; +} + + +/*! + \reimp +*/ +QSize QSvgWidget::sizeHint() const +{ + Q_D(const QSvgWidget); + if (d->renderer->isValid()) + return d->renderer->defaultSize(); + else + return QSize(128, 64); +} + + +/*! + \reimp +*/ +void QSvgWidget::paintEvent(QPaintEvent *) +{ + Q_D(QSvgWidget); + QStyleOption opt; + opt.init(this); + QPainter p(this); + style()->drawPrimitive(QStyle::PE_Widget, &opt, &p, this); + d->renderer->render(&p); +} + +/*! + Loads the contents of the specified SVG \a file and updates the widget. +*/ +void QSvgWidget::load(const QString &file) +{ + Q_D(const QSvgWidget); + d->renderer->load(file); +} + +/*! + Loads the specified SVG format \a contents and updates the widget. +*/ +void QSvgWidget::load(const QByteArray &contents) +{ + Q_D(const QSvgWidget); + d->renderer->load(contents); +} + +QT_END_NAMESPACE |