fix anchored positioning for TextBox, update example to use it.

Author: FoamyGuy

adafruit_display_text/text_box.py

@@ -264,7 +264,7 @@ def _reset_text(
             # Calculate both "tight" and "loose" bounding box dimensions to match label for
             # anchor_position calculations
             (
-                box_x,
+                box_x,  # noqa: F841, var assigned not used
                 tight_box_y,
                 x_offset,
                 tight_y_offset,
@@ -288,8 +288,6 @@ def _reset_text(
                 y_offset = loose_y_offset
 
             # Calculate the background size including padding
-            tight_box_x = box_x
-            box_x = box_x + self._padding_left + self._padding_right
             box_y = box_y + self._padding_top + self._padding_bottom
 
             if self.dynamic_height:
@@ -343,8 +341,8 @@ def _reset_text(
             self._bounding_box = (
                 self._tilegrid.x + self._padding_left,
                 self._tilegrid.y + self._padding_top,
-                tight_box_x,
-                tight_box_y,
+                self.width,
+                self.height,
             )
 
         if (

examples/display_text_text_box_simpletest.py

@@ -7,6 +7,7 @@
 
 from adafruit_display_text.text_box import TextBox
 
+display = board.DISPLAY
 main_group = displayio.Group()
 
 left_text = ("Left left left left " * 2).rstrip()
@@ -21,8 +22,8 @@
     scale=1,
 )
 
-left_text_area.x = 10
-left_text_area.y = 10
+left_text_area.anchor_point = (0, 0)
+left_text_area.anchored_position = (0, 0)
 main_group.append(left_text_area)
 
 
@@ -38,8 +39,8 @@
     scale=1,
 )
 
-center_text_area.x = 10
-center_text_area.y = 10 + left_text_area.height + 10
+center_text_area.anchor_point = (0.5, 0.5)
+center_text_area.anchored_position = (display.width // 2, display.height // 2)
 main_group.append(center_text_area)
 
 
@@ -55,8 +56,8 @@
     scale=1,
 )
 
-right_text_area.x = 10
-right_text_area.y = center_text_area.y + center_text_area.height + 10
+right_text_area.anchor_point = (1.0, 1.0)
+right_text_area.anchored_position = (display.width, display.height)
 main_group.append(right_text_area)
 
 board.DISPLAY.root_group = main_group