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    //***************************************************************************
    /*
     * TOra - An Oracle Toolkit for DBA's and developers
     * Copyright (C) 2000-2001,2001 Underscore AB
     *
     * This program 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;  only version 2 of
     * the License is valid for this program.
     *
     * 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, write to the Free Software
     * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
     *
     *      As a special exception, you have permission to link this program
     *      with the Oracle Client libraries and distribute executables, as long
     *      as you follow the requirements of the GNU GPL in regard to all of the
     *      software in the executable aside from Oracle client libraries.
     *
     *      Specifically you are not permitted to link this program with the
     *      Qt/UNIX, Qt/Windows or Qt Non Commercial products of TrollTech.
     *      And you are not permitted to distribute binaries compiled against
     *      these libraries without written consent from Underscore AB. Observe
     *      that this does not disallow linking to the Qt Free Edition.
     *
     * All trademarks belong to their respective owners.
     *
     ****************************************************************************/

    #ifndef __TOLINECHART_H
    #define __TOLINECHART_H

    #include
    #include

    class QPopupMenu;

    /** A widget that displays a linechart with optional background throbber (Not implemented yet).
     */

    class toLineChart : public QWidget {
      Q_OBJECT

      QPopupMenu *Menu;

    protected:
      std::list > Values;
      std::list XValues;
      std::list Labels;
      bool Legend;
      bool Last;
      int Grid;
      bool AxisText;
      double MinValue;
      bool MinAuto;
      double MaxValue;
      bool MaxAuto;
      QString YPostfix;
      int Samples;
      QString Title;

      QRect Chart;
      QPoint MousePoint[2];
      int SkipSamples;
      int UseSamples;
      bool Zooming;
      double zMinValue;
      double zMaxValue;

      static double round(double round,bool up);
      QRect fixRect(QPoint p1,QPoint p2);
      virtual void mouseReleaseEvent(QMouseEvent *e);
      virtual void mouseMoveEvent(QMouseEvent *e);
      virtual void mouseDoubleClickEvent(QMouseEvent *e);
      virtual void mousePressEvent(QMouseEvent *e);

      int countSamples(void);
      void clearZoom(void);

      virtual void paintLegend(QPainter *p,QRect &rect);
      virtual void paintTitle(QPainter *p,QRect &rect);
      virtual void paintAxis(QPainter *p,QRect &rect);
      virtual void paintChart(QPainter *p,QRect &rect);
    public:
      /** Create a new linechart.
       * @param parent Parent widget.
       * @param name Name of widget.
       * @param f Widget flags.
       */
      toLineChart(QWidget *parent=NULL,const char *name=NULL,WFlags f=0);

      /** Create a new chart by copying all the data from another chart.
       * @param chart Chart to copy data from.
       * @param parent Parent widget.
       * @param name Name of widget.
       * @param f Widget flags.
       */
      toLineChart(toLineChart *chart,QWidget *parent=NULL,const char *name=NULL,WFlags f=0);

      /** Specify if legend should be displayed to the right of the graph, default is on.
       * @param on Whether to display legend or not.
       */
      void showLegend(bool on)
      { Legend=on; update(); }
      /** Check if legend is displayed or not.
       * @return If legend is displayed or not.
       */
      bool legend(void) const
      { return Legend; }

      /** Show most recent value on top of graph
       * @param on Whether to display or not.
       */
      void showLast(bool on)
      { Last=on; update(); }
      /** Check if last value is displayed or not.
       * @return If value is displayed or not.
       */
      bool last(void) const
      { return Last; }

      /** Set title of the chart. Set to empty string to not display title.
       * @param title Title of chart.
       */
      void setTitle(const QString &title=QString::null)
      { Title=title; update(); }
      /** Get title of chart.
       * @return Title of chart.
       */
      const QString &title(void)
      { return Title; }

      /** Specify if a grid should be displayed in the graph, default is on.
       * @param div Number of parts to divide grid into.
       */
      void showGrid(int div=0)
      { Grid=div; update(); }
      /** Check if grid is displayed or not.
       * @return Number of parts to divide grid into.
       */
      int grid(void) const
      { return Grid; }

      /** Specify if a y-axis legend should be displayed in the graph, default is on.
       * @param on Whether to display legend or not.
       */
      void showAxisLegend(bool on)
      { AxisText=on; update(); }
      /** Check if y-axis legend is displayed or not.
       * @return If legend is displayed or not.
       */
      bool axisLegend(void) const
      { return AxisText; }

      /** Set y postfix value. This will be appended to the values in the axis legend.
       * @param postfix The string to append.
       */
      void setYPostfix(const QString &postfix)
      { YPostfix=postfix; update(); }
      /** Set max value on y-axis to auto.
       */
      void setMaxValueAuto(void)
      { MaxAuto=true; update(); }
      /** Set min value on y-axis to auto.
       */
      void setMinValueAuto(void)
      { MinAuto=true; update(); }
      /** Set max value on y-axis.
       * @param val Max value on y-axis.
       */
      void setMaxValue(double maxVal)
      { MaxAuto=false; MaxValue=maxVal; update(); }
      /** Set min value on y-axis.
       * @param val Min value on y-axis.
       */
      void setMinValue(double minVal)
      { MinAuto=false; MinValue=minVal; update(); }
      /** Get minimum value on y-axis. Will not return the automatically determinned minimum value.
       * @return Minimum value on y-axis.
       */
      double minValue(void) const
      { return MinValue; }
      /** Get maximum value on y-axis. Will not return the automatically determinned maximum value.
       * @return Maximum value on y-axis.
       */
      double maxValue(void) const
      { return MaxValue; }

      /** Set the number of samples on the x-axis. Setting samples to -1 will keep all entries.
       * @param samples Number of samples.
       */
      void setSamples(int samples=-1);
      /** Get the maximum number of samples on the x-axis.
       * @return Max number of samples.
       */
      int samples(void) const
      { return Samples; }

      /** Set the labels on the chart lines.
       * @param labels Labels of the lines. Empty labels will not show up in the legend.
       */
      void setLabels(const std::list &labels)
      { Labels=labels; update(); }
      /** Get the labels of the chart lines.
       * @return List of labels.
       */
      std::list &labels(void)
      { return Labels; }

      /** Add a new value set to the chart.
       * @param value New values for charts (One for each line).
       * @param label X-value on these values.
       */
      virtual void addValues(std::list &value,const QString &xValues);

      /** Get list of labels
       * @return List of labels
       */
      std::list &xValues(void)
      { return XValues; }

      /** Get list of values.
       * @return Values in piechart.
       */
      std::list > &values(void)
      { return Values; }

    public slots:
      /** Clear the values from the chart.
       */
      virtual void clear(void)
      { Values.clear(); XValues.clear(); update(); }

      /** Setup values of charts.
       */
      virtual void setup(void);

      /** Print the chart.
       */
      virtual void editPrint(void);

      /** Open chart in new window.
       */
      virtual void openCopy(void);
    protected:
      /** Reimplemented for internal reasons.
       */
      virtual void paintEvent(QPaintEvent *e);
    };

    #endif