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//
// Color chooser test program for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2018 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_Box.H>
#include <FL/Fl_Button.H>
#include <FL/fl_show_colormap.H>
#include <FL/Fl_Color_Chooser.H>
#include <FL/Fl_Image.H>
#include <FL/Fl_Tooltip.H>
#include <FL/platform.H>
#include <FL/fl_draw.H>
#include <stdlib.h>
#include <stdio.h>
#include "list_visuals.cxx"
int width = 100;
int height = 100;
uchar *image;
Fl_Box *hint;
void make_image() {
image = new uchar[3*width*height];
uchar *p = image;
for (int y = 0; y < height; y++) {
double Y = double(y)/(height-1);
for (int x = 0; x < width; x++) {
double X = double(x)/(width-1);
*p++ = uchar(255*((1-X)*(1-Y))); // red in upper-left
*p++ = uchar(255*((1-X)*Y)); // green in lower-left
*p++ = uchar(255*(X*Y)); // blue in lower-right
}
}
}
class Pens : public Fl_Box {
void draw() FL_OVERRIDE;
public:
Pens(int X, int Y, int W, int H, const char* L)
: Fl_Box(X,Y,W,H,L) {}
};
void Pens::draw() {
// use every color in the gray ramp:
for (int i = 0; i < 3*8; i++) {
fl_color((Fl_Color)(FL_GRAY_RAMP+i));
fl_line(x()+i, y(), x()+i, y()+h());
}
}
Fl_Color c = FL_GRAY;
#define fullcolor_cell (FL_FREE_COLOR)
void cb1(Fl_Widget *, void *v) {
c = fl_show_colormap(c);
Fl_Box* b = (Fl_Box*)v;
b->color(c);
hint->labelcolor(fl_contrast(FL_BLACK,c));
b->parent()->redraw();
}
void cb2(Fl_Widget *, void *v) {
uchar r,g,b;
Fl::get_color(c,r,g,b);
if (!fl_color_chooser("New color:",r,g,b,3)) return;
c = fullcolor_cell;
Fl::set_color(fullcolor_cell,r,g,b);
Fl_Box* bx = (Fl_Box*)v;
bx->color(fullcolor_cell);
hint->labelcolor(fl_contrast(FL_BLACK,fullcolor_cell));
bx->parent()->redraw();
}
class Sample_Box: public Fl_Box {
public:
Sample_Box(int x, int y, int w, int h, const char *label = 0)
: Fl_Box(x, y, w, h, label) { }
int handle(int event) {
if (event == FL_BEFORE_TOOLTIP) {
char buf[128];
uchar r, g, b;
Fl::get_color(color(), r, g, b);
if ((color()&255) && (color()!=16)) {
::snprintf(buf, 127,
"Background color is:\n"
"palette no. %d = r:%d, g:%d, b:%d", color(), r, g, b);
} else {
::snprintf(buf, 127,
"Background color is:\n"
"r:%d, g:%d, b:%d", r, g, b);
}
return Fl_Tooltip::_text(buf);
}
return Fl_Box::handle(event);
}
};
int main(int argc, char ** argv) {
Fl::set_color(fullcolor_cell,145,159,170);
Fl_Window window(400,400);
Sample_Box box(30,30,340,340);
box.tooltip("Show RGB values");
box.box(FL_THIN_DOWN_BOX);
c = fullcolor_cell;
box.color(c);
Fl_Box hintbox(40,40,320,30,"Pick background color with buttons:");
hintbox.align(FL_ALIGN_INSIDE);
hint = &hintbox;
Fl_Button b1(120,80,180,30,"fl_show_colormap()");
b1.callback(cb1,&box);
Fl_Button b2(120,120,180,30,"fl_color_chooser()");
b2.callback(cb2,&box);
Fl_Box image_box(160,190,width,height,0);
make_image();
(new Fl_RGB_Image(image, width, height))->label(&image_box);
Fl_Box b(160,310,120,30,"Example of fl_draw_image()");
Pens p(60,180,3*8,120,"lines");
p.align(FL_ALIGN_TOP);
int i = 1;
if (!Fl::args(argc,argv,i) || i < argc-1) {
printf("usage: %s <switches> visual-number\n"
" - : default visual\n"
" r : call Fl::visual(FL_RGB)\n"
" c : call Fl::own_colormap()\n",argv[0]);
#ifdef FLTK_USE_X11
printf(" # : use this visual with an empty colormap:\n");
list_visuals();
#endif
puts(Fl::help);
exit(1);
}
if (i!=argc) {
if (argv[i][0] == 'r') {
if (!Fl::visual(FL_RGB)) printf("Fl::visual(FL_RGB) returned false.\n");
} else if (argv[i][0] == 'c') {
Fl::own_colormap();
} else if (argv[i][0] != '-') {
#ifdef FLTK_USE_X11
int visid = atoi(argv[i]);
fl_open_display();
XVisualInfo templt; int num;
templt.visualid = visid;
fl_visual = XGetVisualInfo(fl_display, VisualIDMask, &templt, &num);
if (!fl_visual) Fl::fatal("No visual with id %d",visid);
fl_colormap = XCreateColormap(fl_display, RootWindow(fl_display,fl_screen),
fl_visual->visual, AllocNone);
fl_xpixel(FL_BLACK); // make sure black is allocated
#else
Fl::fatal("Visual id's not supported on Windows or MacOS.");
#endif
}
}
window.show(argc,argv);
return Fl::run();
}
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