Add display.get_dpi() and show in About app

internal_filesystem/builtin/apps/com.micropythonos.about/assets/about.py

@@ -1,4 +1,4 @@
-from mpos import Activity, pct_of_display_width
+from mpos import Activity, pct_of_display_width, get_display_width, get_display_height, get_dpi
 
 import mpos.info
 import sys
@@ -90,32 +90,22 @@ class About(Activity):
             try:
                 self._add_label(screen, f"{lv.SYMBOL.SETTINGS} ESP32 Hardware", is_header=True)
                 import esp32
-                self._add_label(screen, f"Flash size: {esp32.flash_size()} bytes")
-                try:
-                    psram_size = esp32.psram_size()
-                    self._add_label(screen, f"PSRAM size: {psram_size} bytes")
-                except:
-                    pass
-                try:
-                    idf_version = esp32.idf_version()
-                    self._add_label(screen, f"IDF version: {idf_version}")
-                except:
-                    pass
+                self._add_label(screen, f"Temperature: {esp32.mcu_temperature()} °C")
             except Exception as e:
                 print(f"Could not get ESP32 hardware info: {e}")
 
-        # Partition info (ESP32 only)
-        try:
-            self._add_label(screen, f"{lv.SYMBOL.SD_CARD} Partition Info", is_header=True)
-            from esp32 import Partition
-            current = Partition(Partition.RUNNING)
-            self._add_label(screen, f"Partition.RUNNING: {current}")
-            next_partition = current.get_next_update()
-            self._add_label(screen, f"Next update partition: {next_partition}")
-        except Exception as e:
-            error = f"Could not find partition info because: {e}\nIt's normal to get this error on desktop."
-            print(error)
-            self._add_label(screen, error)
+            # Partition info (ESP32 only)
+            try:
+                self._add_label(screen, f"{lv.SYMBOL.SD_CARD} Partition Info", is_header=True)
+                from esp32 import Partition
+                current = Partition(Partition.RUNNING)
+                self._add_label(screen, f"Partition.RUNNING: {current}")
+                next_partition = current.get_next_update()
+                self._add_label(screen, f"Next update partition: {next_partition}")
+            except Exception as e:
+                error = f"Could not find partition info because: {e}\nIt's normal to get this error on desktop."
+                print(error)
+                self._add_label(screen, error)
 
         # Machine info
         try:
@@ -154,16 +144,11 @@ class About(Activity):
         # Display info
         try:
             self._add_label(screen, f"{lv.SYMBOL.IMAGE} Display", is_header=True)
-            disp = lv.disp_get_default()
-            if disp:
-                hor_res = disp.get_hor_res()
-                ver_res = disp.get_ver_res()
-                self._add_label(screen, f"Resolution: {hor_res}x{ver_res}")
-                try:
-                    dpi = disp.get_dpi()
-                    self._add_label(screen, f"DPI: {dpi}")
-                except:
-                    pass
+            hor_res = get_display_width()
+            ver_res = get_display_height()
+            self._add_label(screen, f"Resolution: {hor_res}x{ver_res}")
+            dpi = get_dpi()
+            self._add_label(screen, f"Dots Per Inch (dpi): {dpi}")
         except Exception as e:
             print(f"Could not get display info: {e}")
 

internal_filesystem/lib/mpos/__init__.py

@@ -31,7 +31,7 @@ from .ui.testing import (
 # UI utility functions
 from .ui.display import (
     pct_of_display_width, pct_of_display_height,
-    get_display_width, get_display_height,
+    get_display_width, get_display_height, get_dpi,
     min_resolution, max_resolution, get_pointer_xy
 )
 from .ui.event import get_event_name, print_event
@@ -73,7 +73,7 @@ __all__ = [
     "MposKeyboard",
     # UI utility functions
     "pct_of_display_width", "pct_of_display_height",
-    "get_display_width", "get_display_height",
+    "get_display_width", "get_display_height", "get_dpi",
     "min_resolution", "max_resolution", "get_pointer_xy",
     "get_event_name", "print_event",
     "setContentView", "back_screen",

internal_filesystem/lib/mpos/ui/__init__.py

@@ -7,7 +7,7 @@ from .theme import set_theme
 from .topmenu import open_bar, close_bar, open_drawer, drawer_open, NOTIFICATION_BAR_HEIGHT
 from .focus import save_and_clear_current_focusgroup
 from .display import (
-    get_display_width, get_display_height,
+    get_display_width, get_display_height, get_dpi,
     pct_of_display_width, pct_of_display_height,
     min_resolution, max_resolution,
     get_pointer_xy   # ← now correct
@@ -28,7 +28,7 @@ __all__ = [
     "set_theme",
     "open_bar", "close_bar", "open_drawer", "drawer_open", "NOTIFICATION_BAR_HEIGHT",
     "save_and_clear_current_focusgroup",
-    "get_display_width", "get_display_height",
+    "get_display_width", "get_display_height", "get_dpi",
     "pct_of_display_width", "pct_of_display_height",
     "min_resolution", "max_resolution",
     "get_pointer_xy",

internal_filesystem/lib/mpos/ui/display.py

@@ -3,14 +3,16 @@ import lvgl as lv
 
 _horizontal_resolution = None
 _vertical_resolution = None
+_dpi = None
 
 def init_rootscreen():
-    global _horizontal_resolution, _vertical_resolution
+    global _horizontal_resolution, _vertical_resolution, _dpi
     screen = lv.screen_active()
     disp = screen.get_display()
     _horizontal_resolution = disp.get_horizontal_resolution()
     _vertical_resolution = disp.get_vertical_resolution()
-    print(f"init_rootscreen set _vertical_resolution to {_vertical_resolution}")
+    _dpi = disp.get_dpi()
+    print(f"init_rootscreen set resolution to {_horizontal_resolution}x{_vertical_resolution} at {_dpi} DPI")
     label = lv.label(screen)
     label.set_text("Welcome to MicroPythonOS")
     label.center()
@@ -40,11 +42,12 @@ def max_resolution():
     return max(_horizontal_resolution, _vertical_resolution)
 
 def get_display_width():
-    if _horizontal_resolution is None:
-        _init_resolution()
     return _horizontal_resolution
 
 def get_display_height():
-    if _vertical_resolution is None:
-        _init_resolution()
     return _vertical_resolution
+
+def get_dpi():
+    print(f"get_dpi_called {_dpi}")
+    return _dpi
+