1 /* nuklear - v1.32.0 - public domain */
2 #include <assert.h>
3 #include <stdio.h>
4 #include <stdlib.h>
5 #include <stdarg.h>
6 #include <string.h>
7 #include <limits.h>
8 #include <math.h>
9 #include <sys/time.h>
10 #include <unistd.h>
11 #include <time.h>
12
13 #define NK_INCLUDE_FIXED_TYPES
14 #define NK_INCLUDE_STANDARD_IO
15 #define NK_INCLUDE_STANDARD_VARARGS
16 #define NK_INCLUDE_DEFAULT_ALLOCATOR
17 #define NK_IMPLEMENTATION
18 #define NK_XLIB_IMPLEMENTATION
19 #include "../../nuklear.h"
20 #include "nuklear_xlib.h"
21
22 #define DTIME 20
23 #define WINDOW_WIDTH 800
24 #define WINDOW_HEIGHT 600
25
26 typedef struct XWindow XWindow;
27 struct XWindow {
28 Display *dpy;
29 Window root;
30 Visual *vis;
31 Colormap cmap;
32 XWindowAttributes attr;
33 XSetWindowAttributes swa;
34 Window win;
35 int screen;
36 XFont *font;
37 unsigned int width;
38 unsigned int height;
39 Atom wm_delete_window;
40 };
41
42 static void
die(const char * fmt,...)43 die(const char *fmt, ...)
44 {
45 va_list ap;
46 va_start(ap, fmt);
47 vfprintf(stderr, fmt, ap);
48 va_end(ap);
49 fputs("\n", stderr);
50 exit(EXIT_FAILURE);
51 }
52
53 static long
timestamp(void)54 timestamp(void)
55 {
56 struct timeval tv;
57 if (gettimeofday(&tv, NULL) < 0) return 0;
58 return (long)((long)tv.tv_sec * 1000 + (long)tv.tv_usec/1000);
59 }
60
61 static void
sleep_for(long t)62 sleep_for(long t)
63 {
64 struct timespec req;
65 const time_t sec = (int)(t/1000);
66 const long ms = t - (sec * 1000);
67 req.tv_sec = sec;
68 req.tv_nsec = ms * 1000000L;
69 while(-1 == nanosleep(&req, &req));
70 }
71
72 /* ===============================================================
73 *
74 * EXAMPLE
75 *
76 * ===============================================================*/
77 /* This are some code examples to provide a small overview of what can be
78 * done with this library. To try out an example uncomment the defines */
79 /*#define INCLUDE_ALL */
80 /*#define INCLUDE_STYLE */
81 /*#define INCLUDE_CALCULATOR */
82 /*#define INCLUDE_OVERVIEW */
83 /*#define INCLUDE_NODE_EDITOR */
84
85 #ifdef INCLUDE_ALL
86 #define INCLUDE_STYLE
87 #define INCLUDE_CALCULATOR
88 #define INCLUDE_OVERVIEW
89 #define INCLUDE_NODE_EDITOR
90 #endif
91
92 #ifdef INCLUDE_STYLE
93 #include "../style.c"
94 #endif
95 #ifdef INCLUDE_CALCULATOR
96 #include "../calculator.c"
97 #endif
98 #ifdef INCLUDE_OVERVIEW
99 #include "../overview.c"
100 #endif
101 #ifdef INCLUDE_NODE_EDITOR
102 #include "../node_editor.c"
103 #endif
104
105 /* ===============================================================
106 *
107 * DEMO
108 *
109 * ===============================================================*/
110 int
main(void)111 main(void)
112 {
113 long dt;
114 long started;
115 int running = 1;
116 XWindow xw;
117 struct nk_context *ctx;
118
119 /* X11 */
120 memset(&xw, 0, sizeof xw);
121 xw.dpy = XOpenDisplay(NULL);
122 if (!xw.dpy) die("Could not open a display; perhaps $DISPLAY is not set?");
123 xw.root = DefaultRootWindow(xw.dpy);
124 xw.screen = XDefaultScreen(xw.dpy);
125 xw.vis = XDefaultVisual(xw.dpy, xw.screen);
126 xw.cmap = XCreateColormap(xw.dpy,xw.root,xw.vis,AllocNone);
127
128 xw.swa.colormap = xw.cmap;
129 xw.swa.event_mask =
130 ExposureMask | KeyPressMask | KeyReleaseMask |
131 ButtonPress | ButtonReleaseMask| ButtonMotionMask |
132 Button1MotionMask | Button3MotionMask | Button4MotionMask | Button5MotionMask|
133 PointerMotionMask | KeymapStateMask;
134 xw.win = XCreateWindow(xw.dpy, xw.root, 0, 0, WINDOW_WIDTH, WINDOW_HEIGHT, 0,
135 XDefaultDepth(xw.dpy, xw.screen), InputOutput,
136 xw.vis, CWEventMask | CWColormap, &xw.swa);
137
138 XStoreName(xw.dpy, xw.win, "X11");
139 XMapWindow(xw.dpy, xw.win);
140 xw.wm_delete_window = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
141 XSetWMProtocols(xw.dpy, xw.win, &xw.wm_delete_window, 1);
142 XGetWindowAttributes(xw.dpy, xw.win, &xw.attr);
143 xw.width = (unsigned int)xw.attr.width;
144 xw.height = (unsigned int)xw.attr.height;
145
146 /* GUI */
147 xw.font = nk_xfont_create(xw.dpy, "fixed");
148 ctx = nk_xlib_init(xw.font, xw.dpy, xw.screen, xw.win, xw.width, xw.height);
149
150 #ifdef INCLUDE_STYLE
151 /*set_style(ctx, THEME_WHITE);*/
152 /*set_style(ctx, THEME_RED);*/
153 /*set_style(ctx, THEME_BLUE);*/
154 /*set_style(ctx, THEME_DARK);*/
155 #endif
156
157 while (running)
158 {
159 /* Input */
160 XEvent evt;
161 started = timestamp();
162 nk_input_begin(ctx);
163 while (XPending(xw.dpy)) {
164 XNextEvent(xw.dpy, &evt);
165 if (evt.type == ClientMessage) goto cleanup;
166 if (XFilterEvent(&evt, xw.win)) continue;
167 nk_xlib_handle_event(xw.dpy, xw.screen, xw.win, &evt);
168 }
169 nk_input_end(ctx);
170
171 /* GUI */
172 if (nk_begin(ctx, "Demo", nk_rect(50, 50, 200, 200),
173 NK_WINDOW_BORDER|NK_WINDOW_MOVABLE|NK_WINDOW_SCALABLE|
174 NK_WINDOW_CLOSABLE|NK_WINDOW_MINIMIZABLE|NK_WINDOW_TITLE))
175 {
176 enum {EASY, HARD};
177 static int op = EASY;
178 static int property = 20;
179
180 nk_layout_row_static(ctx, 30, 80, 1);
181 if (nk_button_label(ctx, "button"))
182 fprintf(stdout, "button pressed\n");
183 nk_layout_row_dynamic(ctx, 30, 2);
184 if (nk_option_label(ctx, "easy", op == EASY)) op = EASY;
185 if (nk_option_label(ctx, "hard", op == HARD)) op = HARD;
186 nk_layout_row_dynamic(ctx, 25, 1);
187 nk_property_int(ctx, "Compression:", 0, &property, 100, 10, 1);
188 }
189 nk_end(ctx);
190 if (nk_window_is_hidden(ctx, "Demo")) break;
191
192 /* -------------- EXAMPLES ---------------- */
193 #ifdef INCLUDE_CALCULATOR
194 calculator(ctx);
195 #endif
196 #ifdef INCLUDE_OVERVIEW
197 overview(ctx);
198 #endif
199 #ifdef INCLUDE_NODE_EDITOR
200 node_editor(ctx);
201 #endif
202 /* ----------------------------------------- */
203
204 /* Draw */
205 XClearWindow(xw.dpy, xw.win);
206 nk_xlib_render(xw.win, nk_rgb(30,30,30));
207 XFlush(xw.dpy);
208
209 /* Timing */
210 dt = timestamp() - started;
211 if (dt < DTIME)
212 sleep_for(DTIME - dt);
213 }
214
215 cleanup:
216 nk_xfont_del(xw.dpy, xw.font);
217 nk_xlib_shutdown();
218 XUnmapWindow(xw.dpy, xw.win);
219 XFreeColormap(xw.dpy, xw.cmap);
220 XDestroyWindow(xw.dpy, xw.win);
221 XCloseDisplay(xw.dpy);
222 return 0;
223 }
224
225