/*
    Copyright (c) 2008-2019 Jan W. Krieger (<jan@jkrieger.de>, <j.krieger@dkfz.de>)

    

    This software is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    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.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/


#ifndef JKQTPEnhancedTableView_H_INCLUDED
#define JKQTPEnhancedTableView_H_INCLUDED
#include "jkqtplottertools/jkqtp_imexport.h"
#include <QTableView>
#include <QPrinter>

/*! \brief this class extends the <a href="http://doc.qt.io/qt-5/qtableview.html">QTableView</a>
    \ingroup jkqtptools_qtwidgets

    This enhanced table view adds some functionality to the Qt class:
      - return HTML code that describes the table (see toHtml() )
      - contains methods to draw the table onto a <a href="http://doc.qt.io/qt-5/qpainter.html">QPainter</a>: paint()
      - the selected cells may be copied to Excel using the clipboard (Excel will recognize number !) see copySelectionToExcel() and copySelectionToCSV()
      - copySelectionToExcel() is called when the user presses the default copy key combination for your system (e.g. Ctrl+C)
      - print() is called when the user presses the default print key combination for your system (e.g. Ctrl+P)
      - the signal keyPressed() is emitted, when the suer pressed a key
    .

    \image html JKQTPEnhancedTableView.png
*/
class JKQTP_LIB_EXPORT JKQTPEnhancedTableView : public QTableView {
        Q_OBJECT
    public:
        JKQTPEnhancedTableView(QWidget* parent=nullptr);
        virtual ~JKQTPEnhancedTableView();

        /** \brief return the contents of the table view as HTML fragment */
        QString toHtml(int borderWidth=1, bool non_breaking=false, int fontSizePt=-1) const;
        /** \brief print the contents of the table view
         *
         * \param printer the QPrinter to use for printing the table view
         * \param onePageWide limit the width of the table to a single page, if not set the printout may span several pages
         * \param onePageHigh limit the height of the table to a single page, if not set the printout may span several pages
         *
         * The printouts look like this:
         *
         * \image html JKQTPEnhancedTableViewPrint.png
         *
         * Depending on the options set in the dialog above, the printout is split over several pages, or not:
         *
         * \image html JKQTPEnhancedTableViewPrintMultipage.png "Split over pages (onePageWide=false onePageHigh=false)"
         * \image html JKQTPEnhancedTableViewPrintSinglepage.png "Print on one page (onePageWide=true onePageHigh=true)"
         */
        void print(QPrinter* printer, bool onePageWide=false, bool onePageHigh=false);

        /** \brief draw the contents of the table-view into the given \a pageRect, using the given \a painter
         *
         * The output look like this:
         *
         * \image html JKQTPEnhancedTableViewPrint.png
         *
         * \see print()
         */
        void paint(QPainter& painter, QRect pageRec=QRect());
        /** \brief returns the totoal size of the table-view \see paint() */
        QSizeF getTotalSize() const;
        /** \brief return a QAction that prints the table using the methode print() \see print() */
        QAction* getActionPrint() const { return printAction; }

    signals:
        /** \brief emitted when a key is pressed in the context of this widget */
        void keyPressed(int key, Qt::KeyboardModifiers modifiers, const QString& text);
    public slots:
        /** \brief copy the selected cells' contents to the clipboard, so it can be pasted into Excel */
        void copySelectionToExcel(int copyrole=Qt::EditRole, bool storeHead=true);
        /** \brief copy the selected cells' contents to the clipboard, so it can be pasted into Excel, without header */
        void copySelectionToExcelNoHead(int copyrole=Qt::EditRole);
        /** \brief copy the selected cells' contents to the clipboard as comma separated text
         *
         * \param copyrole specifies how the values for copying are extracted (see <a href="http://doc.qt.io/qt-5/qt.html#ItemDataRole-enum">Qt::ItemDataRole</a>).
         *                 During the export, this parameter is supplied to function \c data() of the underlying model.
         * \param storeHead en-/disable storage of the table header \see copySelectionToCSVNoHead()
         * \param separator separator between two values (default is a comma)
         * \param decimalpoint decimal separator for values (default is a dot)
         *
         * \see copySelectionToCSVNoHead()
         */
        void copySelectionToCSV(int copyrole=Qt::EditRole, bool storeHead=true, const QString& separator=", ", const QChar& decimalpoint='.');
        /** \brief copy the selected cells' contents to the clipboard as comma separated text, without the header
         *
         * \param copyrole specifies how the values for copying are extracted (see <a href="http://doc.qt.io/qt-5/qt.html#ItemDataRole-enum">Qt::ItemDataRole</a>).
         *                 During the export, this parameter is supplied to function \c data() of the underlying model.
         * \param separator separator between two values (default is a comma)
         * \param decimalpoint decimal separator for values (default is a dot)
         *
         * \see copySelectionToCSV()
         */
        void copySelectionToCSVNoHead(int copyrole=Qt::EditRole, const QString& separator=", ", const QChar& decimalpoint='.');
        /** \brief print the table contents
         *
         * Before printing this function opens a <a href="http://doc.qt.io/qt-5/qprintdialog.html">QPrintDialog</a> to select a printer
         * and then opens a second dialog that allows to set different options for the printout:
         *
         * \image html JKQTPEnhancedTableViewOptionsDialog.png
         *
         * The printouts look like this:
         *
         * \image html JKQTPEnhancedTableViewPrint.png
         *
         * Depending on the options set in the dialog above, the printout is split over several pages, or not:
         *
         * \image html JKQTPEnhancedTableViewPrintMultipage.png "Split over pages (onePageWide=false onePageHigh=false)"
         * \image html JKQTPEnhancedTableViewPrintSinglepage.png "Print on one page (onePageWide=true onePageHigh=true)"
         *
         */
        void print();

    protected:
        /** \brief handles key presses and reacts to some standard keys
         *  \internal
         */
        virtual void keyPressEvent(QKeyEvent* event);
        /** \brief internal paintig method
         *  \internal
         */
        void paint(QPainter &painter, double scale, int page, double hhh, double vhw, const QList<int>& pageCols, const QList<int>& pageRows, QPrinter* p=nullptr);        
        /** \brief select a printer, using a print-selection dialog if necessary */
        QPrinter* getPrinter(QPrinter* printerIn=nullptr, bool *localPrinter=nullptr);
        /** \brief action that calls print() */
        QAction* printAction;
    private:
};


#endif // JKQTPEnhancedTableView_H_INCLUDED