Improved settings app

Text-shaped values can now be edited, WiFi settings can be reset to EMF
defaults.

modules/firmware_apps/settings_app.py

@@ -1,6 +1,6 @@
 import settings
 import app
-from app_components import layout, tokens
+from app_components import layout, tokens, TextDialog, YesNoDialog
 from events.input import BUTTON_TYPES, ButtonDownEvent
 from system.eventbus import eventbus
 from system.scheduler.events import RequestForegroundPushEvent
@@ -12,35 +12,86 @@ def string_formatter(value):
     else:
         return str(value)
 
+async def string_editor(self, label, id, render_update):
+    dialog = TextDialog(label, self)
+    dialog._settings_id = id
+    self.overlays = [dialog]
+
+def reset_wifi_settings():
+    print("RESET WIFI")
+    for s in ["wifi_ssid","wifi_password", "wifi_wpa2ent_username"]:
+        settings.set(s, None)
+
 
 class SettingsApp(app.App):
     def __init__(self):
         self.layout = layout.LinearLayout(items=[])
-        self.make_layout_children()
+        self.overlays = []
         eventbus.on_async(ButtonDownEvent, self._button_handler, self)
-        eventbus.on(RequestForegroundPushEvent, self.make_layout_children, self)
+        #eventbus.on(RequestForegroundPushEvent, self.make_layout_children, self)
+
+
 
     async def _button_handler(self, event):
-        layout_handled = await self.layout.button_event(event)
-        if not layout_handled:
-            if BUTTON_TYPES["CANCEL"] in event.button:
-                self.minimise()
+        if not self.overlays:
+            layout_handled = await self.layout.button_event(event)
+            if not layout_handled:
+                if BUTTON_TYPES["CANCEL"] in event.button:
+                    settings.save()
+                    self.minimise()
+
+    async def run(self, render_update):
+        while True:
+            self.layout.items = []
+            for id, label, formatter, editor in self.settings_options():
+                value = settings.get(id)
+                entry = layout.DefinitionDisplay(label, formatter(value))
+                if editor:
+                    async def _button_event(event, self=self, id=id, label=label, editor=editor):
+                        if BUTTON_TYPES["CONFIRM"] in event.button:
+                            await editor(self, label, id, render_update)
+                            return True
+                        return False
+                    entry.button_event =_button_event
+                self.layout.items.append(entry)
+
+            entry = layout.DefinitionDisplay("WLAN EMF defaults", "reset")
+            async def _button_event_w(event, self=self):
+                if BUTTON_TYPES["CONFIRM"] in event.button:
+                    dialog = YesNoDialog("Reset WLAN settings", self)
+                    dialog._settings_id = "WIFI_MAGIC"
+                    self.overlays = [dialog]
+
+                    return True
+                return False
+            entry.button_event =_button_event_w
+            self.layout.items.append(entry)
+
+            while True:
+                await render_update()
+                if self.overlays:
+                        dialog = self.overlays[0]
+                        result = await dialog.run(render_update)
+                        if result != False: #!= because we want to allow entering empty strings
+                            if dialog._settings_id == "WIFI_MAGIC":
+                                reset_wifi_settings()
+                            else:
+                                settings.set(dialog._settings_id, result)
+                        self.overlays = []
+                        dialog = None
+                        if result:
+                            break
 
-    def make_layout_children(self, event=None):
-        self.layout.items = []
-        for id, label, formatter in self.settings_options():
-            value = settings.get(id)
-            self.layout.items.append(layout.DefinitionDisplay(label, formatter(value)))
 
     def settings_options(self):
         return [
-            ("name", "Name", string_formatter),
-            ("pattern", "LED Pattern", string_formatter),
-            ("wifi_tx_power", "WiFi TX power", string_formatter),
-            ("wifi_connection_timeout", "WiFi connection timeout", string_formatter),
-            ("wifi_ssid", "WiFi SSID", string_formatter),
-            ("wifi_password", "WiFi password", string_formatter),
-            ("wifi_wpa2ent_username", "WPA2 Enterprise Username", string_formatter),
+            ("name", "Name", string_formatter, string_editor),
+            ("pattern", "LED Pattern", string_formatter, None),
+            ("wifi_tx_power", "WiFi TX power", string_formatter, None),
+            ("wifi_connection_timeout", "WiFi connection timeout", string_formatter, None),
+            ("wifi_ssid", "WiFi SSID", string_formatter, string_editor),
+            ("wifi_password", "WiFi password", string_formatter, string_editor),
+            ("wifi_wpa2ent_username", "WPA2 Enterprise Username", string_formatter, string_editor),
         ]
 
     def update(self, delta):
@@ -49,3 +100,4 @@ def update(self, delta):
     def draw(self, ctx):
         tokens.clear_background(ctx)
         self.layout.draw(ctx)
+        self.draw_overlays(ctx)