I was working on a program to draw stock charts but I couldn't find any charts suitable to draw candlesticks or double line-charts.
Normally, the two files to use for Fl_Chart are (Fl_Chart.cxx, Fl_Chart.H).
The replacement class is Fl_ChartEx (Fl_ChartEx.cpp, Fl_ChartEx.H).
Just add them to your project directory. The new object is called Fl_ChartEx.
Use them to get these added effects;
What they do is add two extra arguments to various functions in the Fl_ChartEx class.
val2 and col2. This way, both FL_BAR_CHART and FL_LINE_CHART can have
an extra value to make candlesticks or add an extra line. col2 is the color for
FL_LINE_CHART's 2nd line.
Files Download
Fl_ChartEx.v1.1.zip
Compiling
To compile, you will need flstring.h and comment out config.h from it.
flstring.h is found from the src directory of fltk's source package.
Comment out config.h from flstring.h
//# include <config.h>
Alternatively, generate config.h from the souce file package (./configure).
e.g mychart->add(double val, const char *str, unsigned col, double val2, unsigned col2);
changelog
v1.0
Fl_ChartEx.H : add val2,col2 to structure
Fl_ChartEx.cpp : add arguments (val2, col2)
void add ( val, str, col , val2 , col2 );
void insert ( ind, val, str, col , val2 , col2 );
void replace ( ind, val, str, col , val2 , col2 );
v1.1Fl_ChartEx.cpp : add arguments (val2, col2)
void add ( val, str, col , val2 , col2 );
void insert ( ind, val, str, col , val2 , col2 );
void replace ( ind, val, str, col , val2 , col2 );
Fl_ChartEx.cpp : copied bwidth definition from barchart
to linechart to make all charts the same x-scale.
Examples
STKgraffer , MenJob