1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
|
//
// "$Id: color_chooser.cxx 5519 2006-10-11 03:12:15Z mike $"
//
// Color chooser test program for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2005 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 on the following page:
//
// http://www.fltk.org/str.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/x.H>
#include <FL/fl_draw.H>
#include <stdlib.h>
#include <stdio.h>
#if !defined(WIN32) && !defined(__APPLE__)
#include "list_visuals.cxx"
#endif
int width = 75;
int height = 75;
uchar *image;
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();
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);
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)) return;
c = fullcolor_cell;
Fl::set_color(fullcolor_cell,r,g,b);
Fl_Box* bx = (Fl_Box*)v;
bx->color(fullcolor_cell);
bx->parent()->redraw();
}
int main(int argc, char ** argv) {
Fl::set_color(fullcolor_cell,145,159,170);
Fl_Window window(400,400);
Fl_Box box(50,50,300,300);
box.box(FL_THIN_DOWN_BOX);
c = fullcolor_cell;
box.color(c);
Fl_Button b1(140,120,120,30,"fl_show_colormap");
b1.callback(cb1,&box);
Fl_Button b2(140,160,120,30,"fl_choose_color");
b2.callback(cb2,&box);
Fl_Box image_box(140,200,120,120,0);
make_image();
(new Fl_RGB_Image(image, width, height))->label(&image_box);
Fl_Box b(140,320,120,0,"Example of fl_draw_image()");
Pens p(80,200,3*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]);
#if !defined(WIN32) && !defined(__APPLE__)
printf(" # : use this visual with an empty colormap:\n");
list_visuals();
#endif
puts(Fl::help);
exit(1);
}
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] != '-') {
#if !defined(WIN32) && !defined(__APPLE__)
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 MSWindows or MacOS.");
#endif
}
window.show(argc,argv);
return Fl::run();
}
//
// End of "$Id: color_chooser.cxx 5519 2006-10-11 03:12:15Z mike $".
//
|
