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
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
|
/*
Copyright 2012-2014 David Robillard <http://drobilla.net>
Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.
THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/**
@file pugl_cairo_test.c A simple Pugl test that creates a top-level window.
*/
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <cairo/cairo.h>
#include "pugl/pugl.h"
static int quit = 0;
typedef struct {
int x;
int y;
int w;
int h;
bool pressed;
const char* label;
} Button;
static Button toggle_button = { 16, 16, 128, 64, false, "Test" };
static void
roundedBox(cairo_t* cr, double x, double y, double w, double h)
{
static const double radius = 10;
static const double degrees = 3.14159265 / 180.0;
cairo_new_sub_path(cr);
cairo_arc(cr,
x + w - radius,
y + radius,
radius, -90 * degrees, 0 * degrees);
cairo_arc(cr,
x + w - radius, y + h - radius,
radius, 0 * degrees, 90 * degrees);
cairo_arc(cr,
x + radius, y + h - radius,
radius, 90 * degrees, 180 * degrees);
cairo_arc(cr,
x + radius, y + radius,
radius, 180 * degrees, 270 * degrees);
cairo_close_path(cr);
}
static void
buttonDraw(cairo_t* cr, const Button* but)
{
// Draw base
if (but->pressed) {
cairo_set_source_rgba(cr, 0.4, 0.9, 0.1, 1);
} else {
cairo_set_source_rgba(cr, 0.3, 0.5, 0.1, 1);
}
roundedBox(cr, but->x, but->y, but->w, but->h);
cairo_fill_preserve(cr);
// Draw border
cairo_set_source_rgba(cr, 0.4, 0.9, 0.1, 1);
cairo_set_line_width(cr, 4.0);
cairo_stroke(cr);
// Draw label
cairo_text_extents_t extents;
cairo_set_font_size(cr, 32.0);
cairo_text_extents(cr, but->label, &extents);
cairo_move_to(cr,
(but->x + but->w / 2) - extents.width / 2,
(but->y + but->h / 2) + extents.height / 2);
cairo_set_source_rgba(cr, 0, 0, 0, 1);
cairo_show_text(cr, but->label);
}
static bool
buttonTouches(const Button* but, double x, double y)
{
return (x >= toggle_button.x && x <= toggle_button.x + toggle_button.w &&
y >= toggle_button.y && y <= toggle_button.y + toggle_button.h);
}
static void
onDisplay(PuglView* view)
{
cairo_t* cr = puglGetContext(view);
buttonDraw(cr, &toggle_button);
}
static void
onClose(PuglView* view)
{
quit = 1;
}
static void
onEvent(PuglView* view, const PuglEvent* event)
{
switch (event->type) {
case PUGL_KEY_PRESS:
if (event->key.character == 'q' ||
event->key.character == 'Q' ||
event->key.character == PUGL_CHAR_ESCAPE) {
quit = 1;
}
break;
case PUGL_BUTTON_PRESS:
if (buttonTouches(&toggle_button, event->button.x, event->button.y)) {
toggle_button.pressed = !toggle_button.pressed;
puglPostRedisplay(view);
}
default: break;
}
}
int
main(int argc, char** argv)
{
bool ignoreKeyRepeat = false;
bool resizable = false;
for (int i = 1; i < argc; ++i) {
if (!strcmp(argv[i], "-h")) {
printf("USAGE: %s [OPTIONS]...\n\n"
" -h Display this help\n"
" -i Ignore key repeat\n"
" -r Resizable window\n", argv[0]);
return 0;
} else if (!strcmp(argv[i], "-i")) {
ignoreKeyRepeat = true;
} else if (!strcmp(argv[i], "-r")) {
resizable = true;
} else {
fprintf(stderr, "Unknown option: %s\n", argv[i]);
}
}
PuglView* view = puglInit(NULL, NULL);
puglInitWindowSize(view, 512, 512);
puglInitResizable(view, resizable);
puglInitContextType(view, PUGL_CAIRO);
puglIgnoreKeyRepeat(view, ignoreKeyRepeat);
puglSetEventFunc(view, onEvent);
puglSetDisplayFunc(view, onDisplay);
puglSetCloseFunc(view, onClose);
puglCreateWindow(view, "Pugl Test");
puglShowWindow(view);
while (!quit) {
puglProcessEvents(view);
}
puglDestroy(view);
return 0;
}
|
