fltk/examples/textdisplay-with-colors.cxx

//
//      How to use Fl_Text_Display with colors. -erco 11/09/2010
//      Originally from erco's cheat sheet, permission by author.
//
//      Shows how to use the two Fl_Text_Buffer's needed to manage
//      the text and style info separately.
//
//      For an example of a color text *editor*, see the 'editor'
//      example in the test directory.
//
// Copyright 2010 Greg Ercolano.
// Copyright 1998-2010 by Bill Spitzak and others.
//
// This library is free software. Distribution and use rights are outlined in
// the file "COPYING" which should have been included with this file.  If this
// file is missing or damaged, see the license at:
//
//     https://www.fltk.org/COPYING.php
//
// Please see the following page on how to report bugs and issues:
//
//     https://www.fltk.org/bugs.php
//
#include <FL/Fl.H>
#include <FL/Fl_Window.H>
#include <FL/Fl_Text_Display.H>
int main() {
   // Style table
   Fl_Text_Display::Style_Table_Entry stable[] = {
       // FONT COLOR      FONT FACE   FONT SIZE
       // --------------- ----------- --------------
       {  FL_RED,         FL_COURIER, 18 }, // A - Red
       {  FL_DARK_YELLOW, FL_COURIER, 18 }, // B - Yellow
       {  FL_DARK_GREEN,  FL_COURIER, 18 }, // C - Green
       {  FL_BLUE,        FL_COURIER, 18 }, // D - Blue
   };
   Fl_Window *win = new Fl_Window(640, 480, "Simple Text Display With Colors");
   Fl_Text_Display *disp = new Fl_Text_Display(20, 20, 640-40, 480-40);
   Fl_Text_Buffer *tbuff = new Fl_Text_Buffer();        // text buffer
   Fl_Text_Buffer *sbuff = new Fl_Text_Buffer();        // style buffer
   disp->buffer(tbuff);
   int stable_size = sizeof(stable)/sizeof(stable[0]);  // # entries in style table (4)
   disp->highlight_data(sbuff, stable, stable_size, 'A', 0, 0);
   // Text
   tbuff->text("Red Line 1\nYel Line 2\nGrn Line 3\nBlu Line 4\n"
               "Red Line 5\nYel Line 6\nGrn Line 7\nBlu Line 8\n");
   // Style for text
   sbuff->text("AAAAAAAAAA\nBBBBBBBBBB\nCCCCCCCCCC\nDDDDDDDDDD\n"
               "AAAAAAAAAA\nBBBBBBBBBB\nCCCCCCCCCC\nDDDDDDDDDD\n");
   win->resizable(*disp);
   win->show();
   return(Fl::run());
}