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274 lines
7.6 KiB
274 lines
7.6 KiB
15 years ago
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/*
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* KmPlot - a math. function plotter for the KDE-Desktop
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*
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* Copyright (C) 1998, 1999 Klaus-Dieter Möller
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* 2000, 2002 kd.moeller@t-online.de
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*
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* This file is part of the KDE Project.
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* KmPlot is part of the KDE-EDU Project.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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#ifndef View_included
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#define View_included
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#undef GrayScale
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// Qt includes
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#include <qpixmap.h>
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// KDE includes
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#include <dcopclient.h>
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#include <kactionclasses.h>
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#include <kdebug.h>
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#include <kpopupmenu.h>
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#include <kprinter.h>
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#include <kprogress.h>
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#include <kpushbutton.h>
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// local includes
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#include "diagr.h"
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#include "Viewiface.h"
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#include "xparser.h"
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class XParser;
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class KMinMax;
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class KSliderWindow;
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enum ZoomMode
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{
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Z_Normal = 0,
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Z_Rectangular = 1,
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Z_ZoomIn = 2,
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Z_ZoomOut = 3,
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Z_Center = 4
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};
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/**
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* @short This class contains the plots.
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*
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* It is the central widget of MainDlg.
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* @see MainDlg, MainDlg::view
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*/
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class View : public QWidget, virtual public ViewIface
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{
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Q_OBJECT
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public:
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/// Contructor sets up the parser, too.
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View(bool, bool &, KPopupMenu *, QWidget* parent=NULL, const char* name=NULL );
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void setMinMaxDlg(KMinMax *);
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virtual ~View();
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/// Reimplemented to draw all stuff to the view.
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void draw(QPaintDevice *, int const);
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/// Getting all relevant settings using KConfig XT class Settings.
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void getSettings();
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/// Clears all functions in the parser and gets default settings.
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/// @see getSettings
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void init();
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/// Finding the minimum or maximum value
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void findMinMaxValue(Ufkt *, char, bool, double &, double &,const QString &);
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/// get a y-value from a x-value
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void getYValue(Ufkt * , char, double , double &,const QString &);
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/// draw and calculate the area between the graph and the x-axis.
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void areaUnderGraph(Ufkt *, char const, double &, double &, const QString &, QPainter* );
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/// the calculation was cancelled by the user
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bool isCalculationStopped();
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/// Returns a pointer to the private parser instance m_parser.
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/// @see m_parser
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XParser* parser();
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/** Current plot range endge. */
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static double xmin;
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static double xmax;
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/// trace mode stuff, must be accessible in KMinMax
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int csmode, csparam;
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char cstype;
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/// for areadrawing when printing
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bool areaDraw;
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Ufkt * areaUfkt;
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char areaPMode;
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double areaMin, areaMax;
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QString areaParameter;
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/// Slider controlling parameter values
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KSliderWindow* sliders[ SLIDER_COUNT ];
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/// Menu actions for the sliders
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KToggleAction *mnuSliders[ SLIDER_COUNT ];
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void updateSliders(); /// show only needed sliders
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public slots:
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/// Called when the user want to cancel the drawing
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void stopDrawing();
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/// A slider window has been closed
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void sliderWindowClosed(int);
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/// Called when the graph should be updated
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void drawPlot();
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///Slots for the three first items in popup menu
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void mnuCopy_clicked();
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void mnuMove_clicked();
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void mnuHide_clicked();
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void mnuRemove_clicked();
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void mnuEdit_clicked();
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///Slots for the zoom menu
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void mnuNoZoom_clicked();
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void mnuRectangular_clicked();
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void mnuZoomIn_clicked();
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void mnuZoomOut_clicked();
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void mnuCenter_clicked();
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void mnuTrig_clicked();
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protected slots:
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void paintEvent(QPaintEvent *);
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void resizeEvent(QResizeEvent *);
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/// Updating the cross hair.
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void mouseMoveEvent(QMouseEvent *);
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/// Toggles the trace mode if the cursor is near to a plot.
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void mousePressEvent(QMouseEvent *);
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/// when a key is pressed and the graph widget has focus
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void keyPressEvent(QKeyEvent * );
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/// called when a mouse key is released
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void mouseReleaseEvent ( QMouseEvent * e );
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/// Is needed to be reimplement so that the user can stop a preview-drawing
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bool event( QEvent * e );
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signals:
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void setStatusBarText(const QString &);
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void resetZoom();
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private:
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/// Print out table with additional information.
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/// Only for printing.
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void drawHeaderTable(QPainter *);
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/// Draw the function plots.
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void plotfkt(Ufkt *ufkt, QPainter*);
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/// Gets the greek pi symbol.
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void setpi(QString *);
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/// in trace mode checks, if the function is (near by) zero
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bool root(double *, Ufkt *);
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///return the inverted color
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void invertColor(QColor &, QColor &);
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/// Restore the mouse cursor when a drawing is finished
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void restoreCursor();
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/// Changes the text in the statusbar
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void setStatusBar(const QString &text, const int id);
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/// Functions for the progressbar
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bool stopProgressBar();
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void startProgressBar(int);
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void increaseProgressBar();
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/// The central parser instance.
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/// @see parser()
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XParser *m_parser;
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int w, h;
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float s;
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/// @name Crosshair
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/// Crosshair support.
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//@{
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int fcx; ///< x-position of the crosshais (pixel)
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int fcy; ///< y-position of the crosshais (pixel)
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float csxpos; ///< y-position of the cross hair (real coordinates)
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float csypos; ///< x-position of the cross hair (real coordinates)
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//@}
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/// trace mode stuff
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int csflg;
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bool rootflg;
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CDiagr dgr; ///< Coordinate system
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QPoint ref;
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QRect area,
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PlotArea;
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QPixmap hline,
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vline;
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QWMatrix wm;
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double tlgx, tlgy, drskalx, drskaly;
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QString tlgxstr, tlgystr, drskalxstr, drskalystr;
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double stepWidth; ///< Absolute step width
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/** @name Plotrange
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* There are 4 predefined plot ranges:
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* @li 0: -8..8
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* @li 1: -5..5
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* @li 2: 0..16
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* @li 3: 0..10
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* @li 4: custom
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*/
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//@{
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///Convert axes range predefinition index to boundaries.
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void getMinMax(int koord, QString &mini, QString &maxi);
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/** Handle predefiend axes ranges.
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*
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* @p koord can have the values 0 to 4 which have the following meanings:
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*
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* In the last case @p minstr and @p maxstr are evaluated.
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*/
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void coordToMinMax( const int koord, const QString &minStr, const QString &maxStr,
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double &min, double &max );
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/// Sets the plot range from Settings
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void setPlotRange();
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//@{
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/** Current plot range endge. */
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double ymin;
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double ymax;
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//@}
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//@}
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void setScaling();
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/// represents the KPrinter option app-kmplot-printtable.
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/// @see KPrinterDlg
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bool m_printHeaderTable;
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/// if stop_calculating is true, the user has canceled drawing of an integral graph
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bool stop_calculating;
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/// the background color of the graph
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QColor backgroundcolor;
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/// the inverted background color used by the "Fadenkreuz"
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QColor inverted_backgroundcolor;
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/// pointer to KMinMax
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KMinMax *m_minmax;
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///buffer the current window so all functions don't need to be re-drawed
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QPixmap buffer;
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/// the popup menu
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KPopupMenu *m_popupmenu;
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/// is set to true if an integral is calculated
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bool isDrawing;
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///status of the popup menu
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char m_popupmenushown; /// 0==no popup 1==popup 2==popup+trace mode before
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/// for zoom-mode
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QPoint rectangle_point;
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/*char zoom_mode;*/ ///0=normal 1=rectangular zoom, 2=zoom in, 3=zoom out ,4=drawing a rectangle, 5=center
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ZoomMode zoom_mode;
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/// true == modifications not saved
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bool &m_modified;
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/// False if KmPlot is started as a program, otherwise true
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bool const m_readonly;
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DCOPClient *m_dcop_client;
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QString m_statusbartext1;
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QString m_statusbartext2;
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QString m_statusbartext3;
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QString m_statusbartext4;
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};
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#endif // View_included
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