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//
// "$Id: Fl_get_system_colors.cxx,v 1.5 1999/01/07 19:17:32 mike Exp $"
//
// System color support for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-1999 by Bill Spitzak and others.
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library 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
// Library General Public License for more details.
//
// You should have received a copy of the GNU Library General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
// USA.
//
// Please report all bugs and problems to "fltk-bugs@easysw.com".
//
#include <FL/Fl.H>
#include <FL/x.H>
#include <FL/math.h>
void Fl::background(uchar r, uchar g, uchar b) {
// replace the gray ramp so that FL_GRAY is this color
if (!r) r = 1; else if (r==255) r = 254;
double powr = log(r/255.0)/log((FL_GRAY-FL_GRAY_RAMP)/(FL_NUM_GRAY-1.0));
if (!g) g = 1; else if (g==255) g = 254;
double powg = log(g/255.0)/log((FL_GRAY-FL_GRAY_RAMP)/(FL_NUM_GRAY-1.0));
if (!b) b = 1; else if (b==255) b = 254;
double powb = log(b/255.0)/log((FL_GRAY-FL_GRAY_RAMP)/(FL_NUM_GRAY-1.0));
for (int i = 0; i < FL_NUM_GRAY; i++) {
double gray = i/(FL_NUM_GRAY-1.0);
Fl::set_color(fl_gray_ramp(i),
uchar(pow(gray,powr)*255+.5),
uchar(pow(gray,powg)*255+.5),
uchar(pow(gray,powb)*255+.5));
}
}
static void set_others() {
uchar r,g,b; Fl::get_color(FL_BLACK,r,g,b);
uchar r1,g1,b1; Fl::get_color(FL_WHITE,r1,g1,b1);
Fl::set_color(FL_INACTIVE_COLOR,(2*r+r1)/3, (2*g+g1)/3, (2*b+b1)/3);
Fl::set_color(FL_SELECTION_COLOR,(2*r1+r)/3, (2*g1+g)/3, (2*b1+b)/3);
}
void Fl::foreground(uchar r, uchar g, uchar b) {
Fl::set_color(FL_BLACK,r,g,b);
set_others();
}
void Fl::background2(uchar r, uchar g, uchar b) {
Fl::set_color(FL_WHITE,r,g,b);
set_others();
}
// these are set by Fl::args() and override any system colors:
const char *fl_fg;
const char *fl_bg;
const char *fl_bg2;
#ifdef WIN32
#include <stdio.h>
// simulation of XParseColor:
int fl_parse_color(const char* p, uchar& r, uchar& g, uchar& b) {
if (*p == '#') p++;
int n = strlen(p);
int m = n/3;
const char *pattern = 0;
switch(m) {
case 1: pattern = "%1x%1x%1x"; break;
case 2: pattern = "%2x%2x%2x"; break;
case 3: pattern = "%3x%3x%3x"; break;
case 4: pattern = "%4x%4x%4x"; break;
default: return 0;
}
int R,G,B; if (sscanf(p,pattern,&R,&G,&B) != 3) return 0;
r = R; g = G; b = B;
return 1;
}
static void
getsyscolor(int what, const char* arg, void (*func)(uchar,uchar,uchar))
{
if (arg) {
uchar r,g,b;
if (!fl_parse_color(arg, r,g,b))
Fl::error("Unknown color: %s", arg);
else
func(r,g,b);
} else {
DWORD x = GetSysColor(what);
func(uchar(x&255), uchar(x>>8), uchar(x>>16));
}
}
void Fl::get_system_colors() {
getsyscolor(COLOR_WINDOWTEXT, fl_fg, Fl::foreground);
getsyscolor(COLOR_BTNFACE, fl_bg, Fl::background);
getsyscolor(COLOR_WINDOW, fl_bg2,Fl::background2);
}
#else
// For X we should do something. KDE and Gnome store these colors in
// some standard places, where?
static void
getsyscolor(const char *arg, void (*func)(uchar,uchar,uchar)) {
if (arg) {
XColor x;
if (!XParseColor(fl_display, fl_colormap, arg, &x))
Fl::error("Unknown color: %s", arg);
else
func(x.red>>8, x.green>>8, x.blue>>8);
}
}
void Fl::get_system_colors()
{
fl_open_display();
getsyscolor(fl_fg, Fl::foreground);
getsyscolor(fl_bg, Fl::background);
getsyscolor(fl_bg2,Fl::background2);
}
#endif
//
// End of "$Id: Fl_get_system_colors.cxx,v 1.5 1999/01/07 19:17:32 mike Exp $".
//
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