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/***************************************************************************
copyright : (C) 2003-2006 by Robby Stephenson
email : robby@periapsis.org
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of version 2 of the GNU General Public License as *
* published by the Free Software Foundation; *
* *
***************************************************************************/
#ifndef IMPORTER_H
#define IMPORTER_H
class TQWidget;
#include "../datavectors.h"
#include <klocale.h>
#include <kurl.h>
#include <tqobject.h>
#include <tqstring.h>
namespace Tellico {
namespace Import {
enum Options {
ImportProgress = 1 << 5 // show progress bar
};
/**
* The top-level abstract class for importing other document formats into Tellico.
*
* The Importer classes import a file, and return a pointer to a newly created
* @ref Data::Collection. Any errors or warnings are added to a status message queue.
* The calling function owns the collection pointer.
*
* @author Robby Stephenson
*/
class Importer : public TQObject {
Q_OBJECT
TQ_OBJECT
public:
Importer() : TQObject(), m_options(ImportProgress) {}
/**
* The constructor should immediately load the contents of the file to be imported.
* Any warnings or errors should be added the the status message queue.
*
* @param url The URL of the file to import
*/
Importer(const KURL& url) : TQObject(), m_options(ImportProgress), m_urls(url) {}
Importer(const KURL::List& urls) : TQObject(), m_options(ImportProgress), m_urls(urls) {}
Importer(const TQString& text) : TQObject(), m_options(ImportProgress), m_text(text) {}
/**
*/
virtual ~Importer() {}
/**
* Returns a pointer to a @ref Data::Collection containing the contents of the imported file.
* This function should probably only be called once, but the subclasses may cache the
* collection. The collection should not be created until this function is called.
*
* @return A pointer to a @ref Collection created on the stack, or 0 if none could be created.
*/
virtual Data::CollPtr collection() = 0;
/**
* Returns a string containing all the messages added to the queue in the course of loading
* and importing the file.
*
* @return The status message
*/
const TQString& statusMessage() const { return m_statusMsg; }
/**
* Returns a widget with the setting specific to this importer, or 0 if no
* options are needed.
*
* @return A pointer to the setting widget
*/
virtual TQWidget* widget(TQWidget*, const char*) { return 0; }
/**
* Checks to see if the importer can return a collection of this type
*
* @param type The collection type to check
* @return Whether the importer could return a collection of that type
*/
virtual bool canImport(int) const { return true; }
/**
* Validate the import settings
*/
virtual bool validImport() const { return true; }
virtual void setText(const TQString& text) { m_text = text; }
long options() const { return m_options; }
void setOptions(long options) { m_options = options; }
/**
* Returns a string useful for the ProgressManager
*/
TQString progressLabel() const {
if(url().isEmpty()) return i18n("Loading data..."); else return i18n("Loading %1...").tqarg(url().fileName());
}
public slots:
/**
* The import action was changed in the import dialog
*/
virtual void slotActionChanged(int) {}
protected:
/**
* Return the URL of the imported file.
*
* @return the file URL
*/
KURL url() const { return m_urls.isEmpty() ? KURL() : m_urls[0]; }
KURL::List urls() const { return m_urls; }
TQString text() const { return m_text; }
/**
* Adds a message to the status queue.
*
* @param msg A string containing a warning or error.
*/
void setStatusMessage(const TQString& msg) { if(!msg.isEmpty()) m_statusMsg += msg + TQChar(' '); }
static const uint s_stepSize;
private:
long m_options;
KURL::List m_urls;
TQString m_text;
TQString m_statusMsg;
};
} // end namespace
} // end namespace
#endif
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