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/*
* image.h
*
* Copyright (c) 2001, 2002, 2003, 2004 Frerich Raabe <raabe@kde.org>
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. For licensing and distribution details, check the
* accompanying file 'COPYING'.
*/
#ifndef LIBRSS_IMAGE_H
#define LIBRSS_IMAGE_H
#include "global.h"
#include <tqobject.h>
class TQDomNode;
namespace KIO
{
class Job;
}
class KURL;
namespace RSS
{
/**
* Represents an image as stored in a RSS file. You don't have to
* instantiate one of these yourself, the common way to access instances
* is via Document::image().
* @see Document::image()
*/
class LIBRSS_EXPORT Image : public TQObject
{
Q_OBJECT
TQ_OBJECT
public:
/**
* Default constructor.
*/
Image();
/**
* Copy constructor.
* @param other The Image object to copy.
*/
Image(const Image &other);
/**
* Constructs an Image from a piece of RSS markup.
* @param node A TQDomNode which references the DOM leaf to be used
* for constructing the Image.
*/
Image(const TQDomNode &node);
/**
* Assignment operator.
* @param other The Image object to clone.
* @return A reference to the cloned Image object.
*/
Image &operator=(const Image &other);
/**
* Compares two images. Two images are considered identical if
* their properties (title, description, link etc.) are identical.
* Note that this does not include the actual pixmap data!
* @param other The image to compare with.
* @return Whether the two images are equal.
*/
bool operator==(const Image &other) const;
/**
* Convenience method. Simply calls !operator==().
* @param other The image to compared with.
* @return Whether the two images are unequal.
*/
bool operator!=(const Image &other) const { return !operator==(other); }
/**
* Destructor.
*/
virtual ~Image();
/**
* RSS 0.90 and upwards
* @return The 'caption' of this image, or TQString() if no
* caption is available.
*/
TQString title() const;
/**
* RSS 0.90 and upwards
* @return The URL pointing to the file containing the graphic
* data (GIF, JPEG or PNG format), or an empty KURL if no URL
* is available. You can use getPixmap() and gotPixmap() to have
* the Image download the pixmap data itself.
* Note that the RSS 0.91 Specification dictates that URLs not
* starting with "http://" or "ftp://" are considered invalid.
*/
const KURL &url() const;
/**
* RSS 0.90 and upwards
* @return A link to some resource, or an empty KURL of no link is
* available. Clicking on the image should lead the user to the
* resource referenced by this URL.
* Note that the RSS 0.91 Specification dictates that URLs not
* starting with "http://" or "ftp://" are considered invalid.
*/
const KURL &link() const;
/**
* RSS 0.91 and upwards
* @return A description of what this picture shows, or
* TQString() if no description is available. Useful for
* people who deactivated images but want or need to know what is
* shown.
*/
TQString description() const;
/**
* RSS 0.91 and upwards
* @return The height in pixels as reported by the news site, the
* default value is 31 pixels. The RSS 0.91 Specification requires
* this value to be between 1 and 400.
* '0' if this information isn't available. This is merely provided
* for completeness, you should not rely on this value but rather
* check what height the TQPixmap as returned by gotPixmap()
* reports.
*/
unsigned int height() const;
/**
* RSS 0.91 and upwards
* @return The width in pixels as reported by the news site, the
* default value is 88 pixels. The RSS 0.91 Specification requires
* this value to be between 1 and 144.
* This is merely provided for completeness, you should not rely
* on this value but rather check what width the TQPixmap as
* returned by gotPixmap() reports.
*/
unsigned int width() const;
/**
* Makes the image download the image data as referenced by the
* URL returned by url(). You have to connect to the signal
* gotPixmap() first and then call getPixmap().
*/
void getPixmap();
signals:
/**
* Emitted when this Image is done downloading the actual graphics
* data as referenced by the URL returned by url(). You can trigger
* this download by calling getPixmap().
* @param pixmap The pixmap as constructed from the data referenced
* by the URL returned by link().
*/
void gotPixmap(const TQPixmap &pixmap);
private slots:
void slotData(KIO::Job *job, const TQByteArray &data);
void slotResult(KIO::Job *job);
private:
struct Private;
Private *d;
};
}
#endif // LIBRSS_IMAGE_H
// vim: noet:ts=4
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