helpBrowser.hh

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/*
 * helpBrowser.hh
 *
 *  Created on: Apr 8, 2009
 *      Author: kremer
 */

#ifndef HELPBROWSER_HH_
#define HELPBROWSER_HH_


#if QT_VERSION >= 0x050000 
  #include <QtWidgets>
#else
  #include <QtGui>
#endif

#include <QTextBrowser>
#include <QtHelp>

class HelpBrowser : public QTextBrowser {
        Q_OBJECT

public:

        HelpBrowser(QHelpEngine* _helpEngine, QWidget* parent = 0);

        virtual ~HelpBrowser();

        QVariant loadResource ( int _type, const QUrl& _name );

        bool isBackwardAvailable();

        bool isForwardAvailable();

        QUrl resolveUrl(const QUrl &_url);

signals:
/*
 * is emitted, when the page history was changed.
 * it is not equal to the signal 'sourceChanged'
 * because saving in the history can be skipped
 */
   void historyChanged(const QUrl&);

public slots:

        void open(const QString& _url);

        void open(const QUrl& _url, bool _skipSave = false);

        void backward();

        void forward();

private:

        QUrl getCurrentDir(const QUrl& _url);

        void updateNameSpaceAndFolder (const QUrl& _url);

private slots:
        void rememberHistory (const QUrl& _url);
private:

        QHelpEngine* helpEngine_;

        QList<QUrl> visitedPages_;

        int currentPage_;

        QString currentVirtualFolder_;

        QString currentNameSpace_;

};


#endif /* HELPBROWSER_HH_ */