classic-lite

commit eb1daffff969695c10e009a02adffc7dc5047294
parent 565cc0c9d21fb3af67ac77e3a169442883ffd9c5
Author: Natasha Kerensikova <natacha@instinctive.eu>
Date:   Wed, 25 Nov 2015 18:19:59 +0000

Add basic code to render the hands
Diffstat:
A
src/classic-lite.c
 | 
145
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

1 file changed, 145 insertions(+), 0 deletions(-)
diff --git a/src/classic-lite.c b/src/classic-lite.c
@@ -0,0 +1,145 @@
+/*
+ * Copyright (c) 2015, Natacha Porté
+ * Face design by Łukasz Zalewski
+ *
+ * Permission to use, copy, modify, and 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.
+ *
+ * THE 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.
+ */
+
+#include <pebble.h>
+
+/**********************
+ * CONFIGURABLE STATE *
+ **********************/
+
+static GColor background_color;
+static GColor hand_color;
+
+/*****************
+ * HELPER MACROS *
+ *****************/
+
+#define QUAD_PATH_POINTS(up, left, down, right) {\
+	4, \
+	(GPoint []) { \
+		{ 0, (up) }, \
+		{ (left), 0 }, \
+		{ 0, (down) }, \
+		{ (right), 0 } } }
+
+/**********************
+ * DISPLAY PRIMITIVES *
+ **********************/
+
+static const GPathInfo minute_hand_path_points
+	= QUAD_PATH_POINTS(15, 6, -72, -6);
+static const GPathInfo hour_hand_path_points
+	= QUAD_PATH_POINTS(15, 7, -50, -7);
+
+static struct tm tm_now;
+static Window *window;
+static Layer *hand_layer;
+static GPath *hour_hand_path;
+static GPath *minute_hand_path;
+static GPoint center;
+
+static void
+hand_layer_draw(Layer *layer, GContext *ctx) {
+	(void)layer;
+
+	graphics_context_set_fill_color(ctx, hand_color);
+	graphics_context_set_stroke_color(ctx, background_color);
+
+	gpath_rotate_to(minute_hand_path, TRIG_MAX_ANGLE * tm_now.tm_min / 60);
+	gpath_draw_filled(ctx, minute_hand_path);
+	gpath_draw_outline(ctx, minute_hand_path);
+
+	gpath_rotate_to(hour_hand_path,
+	    TRIG_MAX_ANGLE * (tm_now.tm_hour * 60 + tm_now.tm_min) / 720);
+	gpath_draw_filled(ctx, hour_hand_path);
+	gpath_draw_outline(ctx, hour_hand_path);
+
+	graphics_context_set_fill_color(ctx, background_color);
+	graphics_fill_circle(ctx, center, 2);
+	graphics_context_set_fill_color(ctx, hand_color);
+	graphics_fill_circle(ctx, center, 1);
+}
+
+/********************
+ * SERVICE HANDLERS *
+ ********************/
+
+static void
+tick_handler(struct tm* tick_time, TimeUnits units_changed) {
+	tm_now = *tick_time;
+	layer_mark_dirty(hand_layer);
+}
+
+/***********************************
+ * INITIALIZATION AND FINALIZATION *
+ ***********************************/
+
+static void
+window_load(Window *window) {
+	Layer *window_layer = window_get_root_layer(window);
+	GRect bounds = layer_get_bounds(window_layer);
+	window_set_background_color(window, background_color);
+
+	center = grect_center_point(&bounds);
+	gpath_move_to(hour_hand_path, center);
+	gpath_move_to(minute_hand_path, center);
+
+	hand_layer = layer_create(bounds);
+	layer_set_update_proc(hand_layer, &hand_layer_draw);
+	layer_add_child(window_layer, hand_layer);
+}
+
+static void
+window_unload(Window *window) {
+	layer_destroy(hand_layer);
+}
+
+static void
+init(void) {
+	time_t current_time = time(0);
+	tm_now = *localtime(&current_time);
+
+	window = window_create();
+	window_set_window_handlers(window, (WindowHandlers) {
+		.load = window_load,
+		.unload = window_unload,
+	});
+
+	background_color = GColorWhite;
+	hand_color = GColorBlack;
+
+	hour_hand_path = gpath_create(&hour_hand_path_points);
+	minute_hand_path = gpath_create(&minute_hand_path_points);
+
+	tick_timer_service_subscribe(MINUTE_UNIT, &tick_handler);
+	window_stack_push(window, true);
+}
+
+static void
+deinit(void) {
+	tick_timer_service_unsubscribe();
+	gpath_destroy(hour_hand_path);
+	gpath_destroy(minute_hand_path);
+	window_destroy(window);
+}
+
+int
+main(void) {
+	init();
+	app_event_loop();
+	deinit();
+}