# UPDATE: Corrections. Corner Bitmap, Simpletest [√]

Author: jposada202020

adafruit_displayio_layout/widgets/cartesian.py

@@ -247,6 +247,24 @@ def __init__(
         self._screen_palette[4] = 0xFFFFFF
         self._screen_palette[5] = self._background_color
 
+        self._corner_bitmap = displayio.Bitmap(10, 10, 5)
+        rectangle_helper(
+            0,
+            0,
+            self._axes_line_thickness,
+            self._axes_line_thickness,
+            self._corner_bitmap,
+            2,
+            self._screen_palette,
+        )
+
+        self._corner_tilegrid = displayio.TileGrid(
+            self._corner_bitmap,
+            pixel_shader=self._screen_palette,
+            x=-self._axes_line_thickness,
+            y=self.height,
+        )
+
         self._axesx_tilegrid = displayio.TileGrid(
             self._axesx_bitmap,
             pixel_shader=self._screen_palette,
@@ -274,6 +292,7 @@ def __init__(
         self.append(self._axesx_tilegrid)
         self.append(self._axesy_tilegrid)
         self.append(self._screen_tilegrid)
+        self.append(self._corner_tilegrid)
 
         self._update_line = True
 

examples/displayio_layout_cartesian_simpletest.py

@@ -42,9 +42,6 @@
 posx = 0
 posy = 0
 
-while True:
-    my_plane.update_pointer(posx, posy)
-    display.show(my_group)
+for i in range(0, 90, 2):
+    my_plane.update_pointer(i, i)
     time.sleep(0.5)
-    posx = posx + 2
-    posy = posy + 2