65 lines
2.3 KiB
C++
65 lines
2.3 KiB
C++
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//
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// Demonstrate how to use Fl_Chart in fltk
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//
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// Demonstrates rudimentary features of Fl_Chart.
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// Origin: http://seriss.com/people/erco/fltk/#Fl_Chart
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//
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// Copyright 2008 by Greg Ercolano.
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// Copyright 1998-2020 by Bill Spitzak and others.
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//
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// This library is free software. Distribution and use rights are outlined in
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// the file "COPYING" which should have been included with this file. If this
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// file is missing or damaged, see the license at:
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//
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// https://www.fltk.org/COPYING.php
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//
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// Please see the following page on how to report bugs and issues:
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//
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// https://www.fltk.org/bugs.php
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//
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#include <FL/Fl.H>
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#include <FL/Fl_Window.H>
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#include <FL/Fl_Chart.H>
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#include <FL/Fl_Choice.H>
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#include <math.h>
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// Globals
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Fl_Window *G_win = 0;
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Fl_Chart *G_chart = 0;
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Fl_Choice *G_choice = 0;
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// Fl_Choice callback for changing chart type()
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static void chart_type_cb(Fl_Widget *w, void*) {
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const Fl_Menu_Item *item = G_choice->mvalue(); // item picked
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G_chart->type( item->argument() ); // apply change
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G_chart->redraw();
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// printf("Choice: '%s', argument=%ld\n", G_choice->text(), item->argument());
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}
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// main
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int main() {
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G_win = new Fl_Window(1000, 510, "Chart Simple");
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// Fl_Chart with a sin() wave of data
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G_chart = new Fl_Chart(20, 20, G_win->w()-40, G_win->h()-80, "Chart");
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G_chart->bounds(-125.0, 125.0);
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for ( double t=0; t<15; t+=0.5 ) {
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double val = sin(t) * 125.0;
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static char val_str[20];
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sprintf(val_str, "%.0lf", val);
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G_chart->add(val, val_str, (val<0)?FL_RED:FL_GREEN);
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}
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// Let user change chart type
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G_choice = new Fl_Choice(140,470,200,25,"Chart Type: ");
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G_choice->add("FL_BAR_CHART", 0, chart_type_cb, (void*)FL_BAR_CHART );
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G_choice->add("FL_HORBAR_CHART", 0, chart_type_cb, (void*)FL_HORBAR_CHART);
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G_choice->add("FL_LINE_CHART", 0, chart_type_cb, (void*)FL_LINE_CHART);
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G_choice->add("FL_FILL_CHART", 0, chart_type_cb, (void*)FL_FILL_CHART);
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G_choice->add("FL_SPIKE_CHART", 0, chart_type_cb, (void*)FL_SPIKE_CHART);
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G_choice->add("FL_PIE_CHART", 0, chart_type_cb, (void*)FL_PIE_CHART);
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G_choice->add("FL_SPECIALPIE_CHART", 0, chart_type_cb, (void*)FL_SPECIALPIE_CHART);
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G_choice->value(0);
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G_win->resizable(G_win);
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G_win->show();
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return(Fl::run());
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}
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