fixed Button text_entity not being created correctly.

ursina/prefabs/button.py

@@ -56,13 +56,14 @@ def __init__(self, parent=camera.ui, text='', model=Default, radius=.1, origin=(
     def text_getter(self):
         if self.text_entity:
             return self.text_entity.text
+        return ''
 
     def text_setter(self, value):
         if not isinstance(value, str):
             raise TypeError('Text must be a string')
 
         if not self.text_entity:
-            self.text_entity = Text(parent=self.model, text=text, position=Vec3(value[0],value[1],-.1), origin=value, add_to_scene_entities=False)
+            self.text_entity = Text(text=value, parent=self.model, position=Vec3(0,0,-.01), origin=(0,0), add_to_scene_entities=False)
             self.text_entity.world_parent = self
             self.text_entity.world_scale = Vec3(20 * self.text_size)
 
@@ -175,7 +176,7 @@ def on_mouse_exit(self):
 
 
     def fit_to_text(self, radius=.1, padding=Vec2(Text.size*1.5, Text.size)):
-        if not self.text_entity.text or self.text_entity.text == '':
+        if not self.text_entity or not self.text_entity.text or self.text_entity.text == '':
             return
 
         self.text_entity.world_parent = scene

ursina/prefabs/checkbox.py

@@ -20,7 +20,6 @@ def value(self):
 
     @value.setter
     def value(self, new_value):
-        # print('set checkbox state to:', value)
         self._value = new_value
         self.text = ' x'[int(new_value)]
 

ursina/prefabs/input_field.py

@@ -128,6 +128,6 @@ def submit():
         print('ursername:', username_field.text)
         print('password:',  password_field.text)
 
-    Button('Login', scale=.1, color=color.cyan.tint(-.4), y=-.26, on_click=submit).fit_to_text()
+    Button(text='Login', scale=.1, color=color.cyan.tint(-.4), y=-.26, on_click=submit).fit_to_text()
     username_field.on_value_changed = submit
     app.run()