Simplify screen: make it absolute and fill the whole TFT

fs/screen_main.json

@@ -1,15 +1,10 @@
 {
   "name": "Main",
-  "x": 20,
-  "y": 0,
-  "w": 320,
-  "h": 220,
-
   "widgets": [
     {
       "name": "one",
       "x": 16,
-      "y": 16,
+      "y": 36,
       "w": 48,
       "h": 48,
       "label": "One",
@@ -19,7 +14,7 @@
     {
       "name": "two",
       "x": 256,
-      "y": 16,
+      "y": 36,
       "w": 48,
       "h": 48,
       "label": "Two",

fs/screen_one.json

@@ -1,15 +1,10 @@
 {
   "name": "One",
-  "x": 20,
-  "y": 0,
-  "w": 320,
-  "h": 220,
-
   "widgets": [
     {
       "name": "back",
       "x": 16,
-      "y": 16,
+      "y": 36,
       "w": 48,
       "h": 48,
       "label": "Back",
@@ -19,7 +14,7 @@
     {
       "name": "one",
       "x": 256,
-      "y": 16,
+      "y": 36,
       "w": 48,
       "h": 48,
       "label": "One",

fs/screen_two.json

@@ -1,15 +1,11 @@
 {
   "name": "Two",
-  "x": 20,
-  "y": 0,
-  "w": 320,
-  "h": 220,
 
   "widgets": [
     {
       "name": "back",
       "x": 16,
-      "y": 16,
+      "y": 36,
       "w": 48,
       "h": 48,
       "label": "Back",
@@ -19,7 +15,7 @@
     {
       "name": "two",
       "x": 256,
-      "y": 16,
+      "y": 36,
       "w": 48,
       "h": 48,
       "label": "Two",

include/screen.h

@@ -8,7 +8,6 @@
 
 struct screen_t {
   char *name;
-  uint16_t x, y, w, h;
 
   // Private
   SLIST_HEAD(widget_entries, widget_list_t) widget_entries;
@@ -16,7 +15,7 @@ struct screen_t {
   void *default_user_data;
 };
 
-struct screen_t *screen_create(char *name, uint16_t x, uint16_t y, uint16_t w, uint16_t h);
+struct screen_t *screen_create(char *name);
 struct screen_t *screen_create_from_file(char *fn, widget_event_fn handler, void *user_data);
 struct screen_t *screen_create_from_json(char *json, widget_event_fn handler, void *user_data);
 void screen_destroy(struct screen_t **s);

src/main.c

@@ -21,8 +21,8 @@ static void touch_handler(struct mgos_stmpe610_event_data *ed) {
   x = map(ed->x, 0, 4095, 0, _width-1);
   y = map(ed->y, 0, 4095, 0, _height-1);
   LOG(LL_INFO, ("Touch %s at (%d,%d) pressure=%d, length=%d", ed->direction==TOUCH_UP?"UP":"DOWN", x, y, ed->z, ed->length));
-
   widget = screen_widget_find_by_xy(screen, x, y);
+
   if (ed->direction==TOUCH_DOWN) {
     widget_network_recv();
     if (widget && widget->handler)

src/screen.c

@@ -1,15 +1,11 @@
 #include "screen.h"
 
-struct screen_t *screen_create(char *name, uint16_t x, uint16_t y, uint16_t w, uint16_t h) {
+struct screen_t *screen_create(char *name) {
   struct screen_t *screen = NULL;
 
   screen = (struct screen_t *) calloc(1, sizeof(*screen));
   if (!screen)
     return NULL;
-  screen->x=x; 
-  screen->y=y; 
-  screen->w=w; 
-  screen->h=h; 
   if (name)
     screen->name=strdup(name);
   SLIST_INIT(&screen->widget_entries);
@@ -39,14 +35,13 @@ struct screen_t *screen_create_from_json(char *json, widget_event_fn handler, vo
   int idx;
   struct screen_t *screen = NULL;
   struct widget_t *widget = NULL;
-  int screen_x, screen_y, screen_w, screen_h;
   char *screen_name = NULL;
 
-  if (json_scanf(json, strlen(json), "{x:%d,y:%d,w:%d,h:%d,name:%Q}", &screen_x, &screen_y, &screen_w, &screen_h, &screen_name) != 5) {
+  if (json_scanf(json, strlen(json), "{name:%Q}", &screen_name) != 1) {
-    LOG(LL_ERROR, ("Incomplete JSON: require 'x', 'y', 'w', 'h' and 'name' fields"));
+    LOG(LL_ERROR, ("Incomplete JSON: require 'name' fields"));
     screen=NULL; goto exit;
   }
-  screen = screen_create(screen_name, screen_x, screen_y, screen_w, screen_h);
+  screen = screen_create(screen_name);
   if (!screen)
     return NULL;
   screen_widget_set_handler(screen, handler, user_data);

src/widget_default.c

@@ -2,6 +2,17 @@
 #include "tft.h"
 #include "mongoose-touch.h"
 
+static void widget_default_draw(struct widget_t *w) {
+  if (!w)
+    return;
+  mgos_ili9341_setclipwin(w->x, w->y, w->x+w->w, w->y+w->h);
+
+  mgos_ili9341_drawRect(0, 0, w->w, w->h, ILI9341_GREEN);
+
+  if (w->img)
+    mgos_ili9341_jpg_image(0, 0, 1, w->img, NULL, 0);
+}
+
 void widget_default_ev(int ev, struct widget_t *w, void *ev_data) {
   char evname[15];
 
@@ -15,6 +26,8 @@ void widget_default_ev(int ev, struct widget_t *w, void *ev_data) {
     case EV_WIDGET_CREATE:
     case EV_WIDGET_DRAW:
     case EV_WIDGET_REDRAW:
+      widget_default_draw(w);
+      break;
     case EV_WIDGET_TIMER:
     case EV_WIDGET_TOUCH_UP:
     case EV_WIDGET_TOUCH_DOWN: