Initial import

2 files changed, 174 insertions, 0 deletions

diff --git a/glitchyclock.c b/glitchyclock.c
new file mode 100644
index 0000000..ec27cd6
--- /dev/null
+++ b/glitchyclock.c
@@ -0,0 +1,156 @@
+#include <gtk/gtk.h>
+
+struct glitchyclock
+{
+	GtkWidget *da;
+	PangoFontDescription *fontdesc;
+	int nglitch;
+	time_t glitch_base;
+};
+
+
+const int glitch_times[] = {
+	 7, 15,
+	23, 58,
+	-1, -1
+};
+
+
+static time_t get_monotonic_seconds()
+{
+	struct timespec tp;
+	clock_gettime(CLOCK_MONOTONIC, &tp);
+	return tp.tv_sec;
+}
+
+
+static void do_glitch(struct glitchyclock *gc)
+{
+	if ( glitch_times[2*(gc->nglitch+1)] == -1 ) return;
+	gc->nglitch++;
+	gc->glitch_base = get_monotonic_seconds();
+}
+
+
+static gboolean draw_sig(GtkWidget *widget, cairo_t *cr, struct glitchyclock *gc)
+{
+	int w, h;
+	int lw, lh;
+	double sf;
+	PangoLayout *layout;
+	const double screen_w_frac = 0.4;
+	int glitch_hours, glitch_minutes;
+	char timestr[64];
+	int seconds;
+
+	w = gtk_widget_get_allocated_width(widget);
+	h = gtk_widget_get_allocated_height(widget);
+
+	/* Overall background */
+	cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
+	cairo_paint(cr);
+
+	layout = pango_layout_new(gtk_widget_get_pango_context(widget));
+	pango_layout_set_alignment(layout, PANGO_ALIGN_CENTER);
+	pango_layout_set_font_description(layout, gc->fontdesc);
+
+	glitch_hours = glitch_times[gc->nglitch*2];
+	glitch_minutes = glitch_times[gc->nglitch*2+1];
+	seconds = get_monotonic_seconds() - gc->glitch_base;
+
+	if ( seconds < 4 ) {
+		strcpy(timestr, "rK:S8");
+	} else {
+		int hours, minutes;
+		hours = (seconds/3600 + glitch_hours) % 24;
+		minutes = (seconds/60 + glitch_minutes) % 60;
+		snprintf(timestr, 63, "%02i:%02i", hours, minutes);
+	}
+	pango_layout_set_text(layout, timestr, -1);
+
+	pango_cairo_update_layout(cr, layout);
+	pango_layout_get_size(layout, &lw, &lh);
+
+	sf = (double)PANGO_SCALE*screen_w_frac*w/lw;
+	cairo_scale(cr, sf, sf);
+	pango_cairo_update_layout(cr, layout);
+
+	pango_layout_get_size(layout, &lw, &lh);
+	lw /= PANGO_SCALE;  lh /= PANGO_SCALE;
+	w /= sf;  h /= sf;
+	cairo_translate(cr, (w-lw)/2.0, h-lh);
+	pango_cairo_update_layout(cr, layout);
+
+	cairo_set_source_rgb(cr, 1.0, 0.0, 0.0);
+	pango_cairo_show_layout(cr, layout);
+
+	return FALSE;
+}
+
+
+static gboolean redraw_cb(gpointer data)
+{
+	gint w, h;
+	struct glitchyclock *gc = data;
+	w = gtk_widget_get_allocated_width(GTK_WIDGET(gc->da));
+	h = gtk_widget_get_allocated_height(GTK_WIDGET(gc->da));
+	gtk_widget_queue_draw_area(GTK_WIDGET(gc->da), 0, 0, w, h);
+	return G_SOURCE_CONTINUE;
+}
+
+
+static gboolean key_press_sig(GtkWidget *da, GdkEventKey *event, struct glitchyclock *gc)
+{
+	if ( event->keyval == GDK_KEY_KP_Enter ) {
+		do_glitch(gc);
+		redraw_cb(gc);
+		return TRUE;
+	}
+
+	return FALSE;
+}
+
+
+static gint realise_sig(GtkWidget *da, struct glitchyclock *gc)
+{
+	GdkWindow *win = gtk_widget_get_window(da);
+
+	/* Keyboard and input method stuff */
+	gdk_window_set_accept_focus(win, TRUE);
+	g_signal_connect(G_OBJECT(da), "key-press-event", G_CALLBACK(key_press_sig), gc);
+
+	gc->fontdesc = pango_font_description_from_string("DSEG7 Modern Bold 16");
+
+	return FALSE;
+}
+
+
+int main(int argc, char *argv[])
+{
+	struct glitchyclock gc;
+	GtkWidget *mainwindow;
+
+	gc.nglitch = 0;
+	gc.glitch_base = get_monotonic_seconds();
+	gtk_init(&argc, &argv);
+
+	mainwindow = gtk_window_new(GTK_WINDOW_TOPLEVEL);
+	gtk_window_fullscreen(GTK_WINDOW(mainwindow));
+	g_signal_connect_swapped(G_OBJECT(mainwindow), "destroy", gtk_main_quit, NULL);
+
+	gc.da = gtk_drawing_area_new();
+	gtk_container_add(GTK_CONTAINER(mainwindow), GTK_WIDGET(gc.da));
+	gtk_widget_set_can_focus(GTK_WIDGET(gc.da), TRUE);
+	gtk_widget_add_events(gc.da, GDK_KEY_PRESS_MASK | GDK_KEY_RELEASE_MASK);
+	g_signal_connect(G_OBJECT(gc.da), "draw", G_CALLBACK(draw_sig), &gc);
+	g_signal_connect(G_OBJECT(gc.da), "realize", G_CALLBACK(realise_sig), &gc);
+
+	gtk_widget_grab_focus(GTK_WIDGET(gc.da));
+	gtk_widget_show_all(mainwindow);
+
+	g_timeout_add(1000, redraw_cb, &gc);
+
+	gtk_main();
+
+	return 0;
+}
diff --git a/meson.build b/meson.build
new file mode 100644
index 0000000..97fd6cd
--- /dev/null
+++ b/meson.build
@@ -0,0 +1,18 @@
+# Meson file for GlitchyClock
+project('glitchyclock', 'c',
+        version : '0.1.0',
+        license : 'GPL3+',
+        default_options : ['buildtype=debugoptimized'])
+
+# Dependencies
+cc = meson.get_compiler('c')
+mdep = cc.find_library('m', required : false)
+gtk_dep = dependency('gtk+-3.0', required : true)
+cairo_dep = dependency('cairo', required : true)
+
+# Main program
+executable('glitchyclock',
+           ['glitchyclock.c',
+           ],
+           dependencies : [gtk_dep, mdep],
+           install : true)