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
|
/*
* This file is part of XForms.
*
* XForms is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1, or
* (at your option) any later version.
*
* XForms 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with XForms; see the file COPYING. If not, write to
* the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
* MA 02111-1307, USA.
*/
/* This demo is meant to demonstrate the use of a free
object in a form.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "include/forms.h"
#include <stdlib.h>
int on = 1,
dcol = 1;
FL_COLOR cole;
/***************************************
* The call back routine
***************************************/
int handle_free1( FL_OBJECT * obj,
int event,
FL_Coord mx FL_UNUSED_ARG,
FL_Coord my FL_UNUSED_ARG,
int key FL_UNUSED_ARG,
void * ev FL_UNUSED_ARG )
{
static int dcol = 1;
switch ( event )
{
case FL_DRAW:
fl_rectf( obj->x, obj->y, obj->w, obj->h, obj->u_ldata );
break;
case FL_RELEASE:
on = ! on;
break;
case FL_STEP:
if ( on )
{
if ( ( FL_COLOR ) obj->u_ldata >= cole )
dcol = -1;
if ( obj->u_ldata <= FL_FREE_COL1 )
dcol = 1;
obj->u_ldata += dcol;
fl_redraw_object( obj );
}
break;
}
return 0;
}
/***************************************
***************************************/
void done( FL_OBJECT * ob FL_UNUSED_ARG,
long data FL_UNUSED_ARG )
{
fl_finish( );
exit( 0 );
}
/***************************************
***************************************/
int
main( int argc,
char * argv[ ] )
{
FL_FORM *form;
FL_OBJECT *obj;
FL_COLOR i;
int j,
depth,
col;
fl_initialize(&argc, argv, "FormDemo", 0, 0);
form = fl_bgn_form( FL_UP_BOX, 400, 400 );
obj = fl_add_button( FL_NORMAL_BUTTON, 320, 20, 40, 30, "Exit" );
fl_set_object_callback( obj, done, 0 );
obj = fl_add_free( FL_CONTINUOUS_FREE, 40, 80, 320, 280, "", handle_free1 );
fl_end_form( );
/* Can't do it if less than 4 bit deep... */
depth = fl_get_visual_depth( );
if ( depth < 4 )
{
fprintf( stderr,"This Demo requires a depth of at least 4 bits\n" );
fl_finish( );
exit( 1 );
}
/* ...but too large a depth also won't do */
if ( depth > 7 )
depth = 7;
cole = ( 1 << depth ) - 1;
if ( cole > 64 )
cole = 64;
obj->u_ldata = col = FL_FREE_COL1;
cole += col;
for ( i = col; i <= cole; i++ )
{
j = 255 * ( i - col ) / ( double ) ( cole - col );
fl_mapcolor( i, j, j, j );
}
fl_show_form( form,FL_PLACE_CENTER, FL_NOBORDER, "Free Object" );
fl_do_forms( );
return 0;
}
|
