274 lines
9.7 KiB
C++
274 lines
9.7 KiB
C++
/*
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* Copyright 2006-2007 Aaron Seigo <aseigo@kde.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Library General Public License as
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* published by the Free Software Foundation; either version 2, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#ifndef PLASMA_SVG_H
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#define PLASMA_SVG_H
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#include <QtCore/QObject>
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#include <QtGui/QPixmap>
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#include <plasma/plasma_export.h>
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class QPainter;
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class QPoint;
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class QPointF;
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class QRect;
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class QRectF;
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class QSize;
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class QSizeF;
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class QMatrix;
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namespace Plasma
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{
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class FrameSvgPrivate;
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class SvgPrivate;
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class Theme;
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/**
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* @class Svg plasma/svg.h <Plasma/Svg>
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*
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* @short A theme aware image-centric SVG class
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*
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* Plasma::Svg provides a class for rendering SVG images to a QPainter in a
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* convenient manner. Unless an absolute path to a file is provided, it loads
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* the SVG document using Plasma::Theme. It also provides a number of internal
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* optimizations to help lower the cost of painting SVGs, such as caching.
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*
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* @see Plasma::FrameSvg
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**/
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class PLASMA_EXPORT Svg : public QObject
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{
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Q_OBJECT
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Q_ENUMS(ContentType)
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Q_PROPERTY(QSize size READ size)
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Q_PROPERTY(bool multipleImages READ containsMultipleImages WRITE setContainsMultipleImages)
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Q_PROPERTY(QString imagePath READ imagePath WRITE setImagePath)
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Q_PROPERTY(bool usingRenderingCache READ isUsingRenderingCache WRITE setUsingRenderingCache)
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public:
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/**
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* Constructs an SVG object that implicitly shares and caches rendering
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* As opposed to QSvgRenderer, which this class uses internally,
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* Plasma::Svg represents an image generated from an SVG. As such, it
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* has a related size and transform matrix (the latter being provided
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* by the painter used to paint the image).
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*
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* The size is initialized to be the SVG's native size.
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*
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* @arg parent options QObject to parent this to
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*
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* @related Plasma::Theme
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*/
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explicit Svg(QObject *parent = 0);
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~Svg();
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/**
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* Returns a pixmap of the SVG represented by this object.
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*
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* @arg elelementId the ID string of the element to render, or an empty
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* string for the whole SVG (the default)
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* @return a QPixmap of the rendered SVG
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*/
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Q_INVOKABLE QPixmap pixmap(const QString &elementID = QString());
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/**
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* Paints the SVG represented by this object
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* @arg painter the QPainter to use
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* @arg point the position to start drawing; the entire svg will be
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* drawn starting at this point.
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* @arg elelementId the ID string of the element to render, or an empty
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* string for the whole SVG (the default)
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*/
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Q_INVOKABLE void paint(QPainter *painter, const QPointF &point,
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const QString &elementID = QString());
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/**
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* Paints the SVG represented by this object
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* @arg painter the QPainter to use
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* @arg x the horizontal coordinate to start painting from
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* @arg y the vertical coordinate to start painting from
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* @arg elelementId the ID string of the element to render, or an empty
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* string for the whole SVG (the default)
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*/
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Q_INVOKABLE void paint(QPainter *painter, int x, int y,
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const QString &elementID = QString());
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/**
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* Paints the SVG represented by this object
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* @arg painter the QPainter to use
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* @arg rect the rect to draw into; if smaller than the current size
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* the drawing is starting at this point.
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* @arg elelementId the ID string of the element to render, or an empty
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* string for the whole SVG (the default)
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*/
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Q_INVOKABLE void paint(QPainter *painter, const QRectF &rect,
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const QString &elementID = QString());
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/**
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* Paints the SVG represented by this object
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* @arg painter the QPainter to use
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* @arg x the horizontal coordinate to start painting from
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* @arg y the vertical coordinate to start painting from
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* @arg width the width of the element to draw
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* @arg height the height of the element do draw
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* @arg elelementId the ID string of the element to render, or an empty
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* string for the whole SVG (the default)
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*/
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Q_INVOKABLE void paint(QPainter *painter, int x, int y, int width,
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int height, const QString &elementID = QString());
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/**
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* Currently set size of the SVG
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* @return the current size of the SVG
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**/
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QSize size() const;
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/**
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* Resizes the rendered image. Rendering will actually take place on
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* the next call to paint.
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* @arg width the new width
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* @arg height the new height
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**/
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Q_INVOKABLE void resize(qreal width, qreal height);
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/**
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* Resizes the rendered image. Rendering will actually take place on
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* the next call to paint.
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* @arg size the new size of the image
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**/
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Q_INVOKABLE void resize(const QSizeF &size);
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/**
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* Resizes the rendered image to the natural size of the SVG.
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* Rendering will actually take place on the next call to paint.
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**/
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Q_INVOKABLE void resize();
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/**
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* Size of a given element
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* @arg elementId the id of the element to check
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* @return the current size of a given element, given the current size of the Svg
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**/
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Q_INVOKABLE QSize elementSize(const QString &elementId) const;
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/**
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* The bounding rect of a given element
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* @arg elementId the id of the element to check
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* @return the current rect of a given element, given the current size of the Svg
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**/
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Q_INVOKABLE QRectF elementRect(const QString &elementId) const;
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/**
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* Check when an element exists in the loaded Svg
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* @arg elementId the id of the element to check
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* @return true if the element is defined in the Svg, otherwise false
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**/
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Q_INVOKABLE bool hasElement(const QString &elementId) const;
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/**
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* Returns the element (by id) at the given point. An empty string is
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* returned if no element is at that point.
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*/
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Q_INVOKABLE QString elementAtPoint(const QPoint &point) const;
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/**
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* @return true if the SVG file exists and the document is valid,
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* otherwise false. This method can be expensive as it
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* causes disk access.
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**/
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Q_INVOKABLE bool isValid() const;
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/**
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* Set if the svg contains a single image or multiple ones.
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* @arg multiple true if the svg contains multiple images
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*/
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void setContainsMultipleImages(bool multiple);
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/**
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* @return whether or not the svg contains multiple images or not
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*/
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bool containsMultipleImages() const;
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/**
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* Convenience method for setting the svg file to use for the Svg.
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* @arg svgFilePath the filepath including name of the svg.
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*/
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void setImagePath(const QString &svgFilePath);
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/**
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* Convenience method to get the svg filepath and name of svg.
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* @return the svg's filepath including name of the svg.
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*/
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QString imagePath() const;
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/**
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* Sets whether or not to cache the results of rendering to pixmaps.
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* If the Svg is resized and re-rendered often without pattern to the resulting
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* pixmap dimensions, then it may be less efficient to do disk caching. A good
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* example might be a progress meter that uses an Svg object to paint itself:
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* the meter will be changing often enoughi, with enough unpredictability and
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* without re-use of the previous pixmaps to not get a gain from caching.
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*
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* Most Svg objects should use the caching feature, however.
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* Therefore, the default is to use the render cache.
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*
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* @param useCache true to cache rendered pixmaps
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* @since 4.3
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*/
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void setUsingRenderingCache(bool useCache);
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/**
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* @return true if the Svg is using caching for rendering results
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* @since 4.3
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*/
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bool isUsingRenderingCache() const;
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/**
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* Sets the Plasma::Theme to use with this Svg object. By default, Svg
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* objects use Plasma::Theme::default()
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* @arg theme the theme object to use
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* @since 4.3
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*/
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void setTheme(const Plasma::Theme *theme);
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/**
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* @return the theme used by this Svg
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*/
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const Theme *theme() const;
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Q_SIGNALS:
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void repaintNeeded();
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private:
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SvgPrivate *const d;
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Q_PRIVATE_SLOT(d, void themeChanged())
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Q_PRIVATE_SLOT(d, void colorsChanged())
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Q_PRIVATE_SLOT(d, void scheduledCacheUpdate())
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friend class SvgPrivate;
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friend class FrameSvgPrivate;
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};
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} // Plasma namespace
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#endif // multiple inclusion guard
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