a small clock for X11 that displays time as pixels
(harshly) force window managers to ignore us and not show a border or any other decorations
subscribe to expose events and force a redraw if we were just
exposed; needed after coming back from xlock
+24
-7
+24
-7
pixelclock.c
+24
-7
pixelclock.c
···
1
1
/* vim:ts=8
2
-
* $Id: pixelclock.c,v 1.3 2005/06/28 22:05:56 jcs Exp $
2
+
* $Id: pixelclock.c,v 1.4 2005/06/29 03:19:42 jcs Exp $
3
3
*
4
4
* pixelclock
5
5
* a different way of looking at time
···
92
92
time_t now;
93
93
struct tm *t;
94
94
95
+
XEvent event;
96
+
95
97
bzero(&x, sizeof(struct xinfo));
96
98
97
99
x.width = DEFWIDTH;
···
124
126
hourtick = x.dpy_height / 24;
125
127
126
128
for (;;) {
127
-
if (gettimeofday(&tv[0], NULL))
129
+
if (gettimeofday(&tv[0], NULL))
128
130
errx(1, "gettimeofday");
129
131
/* NOTREACHED */
130
132
···
136
138
newpos = (hourtick * t->tm_hour) +
137
139
(float)(((float)t->tm_min / 60.0) * hourtick) - 3;
138
140
139
-
if (newpos != lastpos) {
141
+
/* check if we just got exposed */
142
+
bzero(&event, sizeof(XEvent));
143
+
XCheckWindowEvent(x.dpy, x.win, ExposureMask, &event);
144
+
145
+
/* only redraw if our time changed enough to move the box or if
146
+
* we were just exposed */
147
+
if ((newpos != lastpos) || (event.type == Expose)) {
140
148
XClearWindow(x.dpy, x.win);
141
149
142
150
XSetForeground(x.dpy, x.gc, getcolor("yellow"));
···
181
189
{
182
190
int rc;
183
191
XGCValues values;
192
+
XSetWindowAttributes attributes;
184
193
XTextProperty win_name_prop;
185
194
186
195
if (!(x.dpy = XOpenDisplay(display)))
···
201
210
BlackPixel(x.dpy, x.screen),
202
211
BlackPixel(x.dpy, x.screen));
203
212
204
-
if (!(x.gc = XCreateGC(x.dpy, x.win, 0, &values)))
205
-
errx(1, "XCreateGC");
206
-
/* NOTREACHED */
207
-
208
213
if (!(rc = XStringListToTextProperty(&win_name, 1, &win_name_prop)))
209
214
errx(1, "XStringListToTextProperty");
210
215
/* NOTREACHED */
211
216
212
217
XSetWMName(x.dpy, x.win, &win_name_prop);
213
218
219
+
/* remove all window manager decorations and force our position/size */
220
+
/* XXX: apparently this is not very nice */
221
+
attributes.override_redirect = True;
222
+
XChangeWindowAttributes(x.dpy, x.win, CWOverrideRedirect, &attributes);
223
+
224
+
if (!(x.gc = XCreateGC(x.dpy, x.win, 0, &values)))
225
+
errx(1, "XCreateGC");
226
+
/* NOTREACHED */
227
+
214
228
XMapWindow(x.dpy, x.win);
229
+
230
+
/* we want to know when we're exposed */
231
+
XSelectInput(x.dpy, x.win, ExposureMask);
215
232
216
233
XFlush(x.dpy);
217
234
XSync(x.dpy, False);