Add root_group property to display

[hackapet/Adafruit_Blinka_Displayio.git] / displayio / _display.py

diff --git a/displayio/_display.py b/displayio/_display.py
index d8b49c7031cd3e6492dc1474c0f8a5f8ef310255..a3da5c5a031a83729806dc7f3a0f6365e9d4d0a4 100644 (file)
--- a/displayio/_display.py
+++ b/displayio/_display.py
@@ -243,8 +243,14 @@ class Display:
         self._core.send(DISPLAY_DATA, CHIP_SELECT_UNTOUCHED, pixels)
 
     def show(self, group: Group) -> None:
-        """Switches to displaying the given group of layers. When group is None, the
+        """
+        .. note:: `show()` is deprecated and will be removed when CircuitPython 9.0.0
+        is released. Use ``.root_group = group`` instead.
+
+        Switches to displaying the given group of layers. When group is None, the
         default CircuitPython terminal will be shown.
+
+        :param Group group: The group to show.
         """
         if group is None:
             group = circuitpython_splash
@@ -401,7 +407,7 @@ class Display:
                 )
 
             buffer = memoryview(bytearray([0] * (buffer_size * 4))).cast("I")
-            mask = memoryview(bytearray([0] * mask_length)).cast("I")
+            mask = memoryview(bytearray([0] * (mask_length * 4))).cast("I")
             self._core.fill_area(subrectangle, mask, buffer)
 
             # Can't acquire display bus; skip the rest of the data.
@@ -525,3 +531,15 @@ class Display:
     def bus(self) -> _DisplayBus:
         """Current Display Bus"""
         return self._core.get_bus()
+
+    @property
+    def root_group(self) -> Group:
+        """The root group on the display.
+        If the root group is set to `displayio.CIRCUITPYTHON_TERMINAL`, the default
+        CircuitPython terminal will be shown.
+        If the root group is set to ``None``, no output will be shown."""
+        return self._core.current_group
+
+    @root_group.setter
+    def root_group(self, new_group: Group) -> None:
+        self._set_root_group(new_group)