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lab on ORM/movies.kv

+ScreenManager:
+    Screen:
+        name: 'movie_entry'
+        id: 'movie_entry'
+        BoxLayout:
+            orientation: 'vertical'
+            Label:
+                text: 'Enter a movie:'
+                font_size: sp(24)
+            BoxLayout:
+                orientation: 'horizontal'
+                Widget:
+                Label:
+                    text: 'Movie Title:'
+                    size_hint: (1.0, None)
+                    height: sp(32)
+                Widget:
+                TextInput:
+                    id: title
+                    multiline: False
+                    write_tab: False
+                    size_hint: (4.0, None)
+                    height: sp(32)
+                Widget:
+            BoxLayout:
+                orientation: 'horizontal'
+                Widget:
+                CheckBox:
+                    id: action
+                    size_hint: (None, None)
+                    size: (sp(32), action_label.height)
+                Label:
+                    id: action_label
+                    text: 'Action'
+                    size_hint: (None, 1.0)
+                    size: self.texture_size
+                Widget:
+            BoxLayout:
+                orientation: 'horizontal'
+                Widget:
+                CheckBox:
+                    id: adventure
+                    size_hint: (None, None)
+                    size: (sp(32), adventure_label.height)
+                Label:
+                    id: adventure_label
+                    text: 'Adventure'
+                    size_hint: (None, 1.0)
+                    size: self.texture_size
+                Widget:
+            BoxLayout:
+                orientation: 'horizontal'
+                Widget:
+                CheckBox:
+                    id: sci_fi
+                    size_hint: (None, None)
+                    size: (sp(32), sci_fi_label.height)
+                Label:
+                    id: sci_fi_label
+                    text: 'SciFi'
+                    size_hint: (None, 1.0)
+                    size: self.texture_size
+                Widget:
+            BoxLayout:
+                orientation: 'horizontal'
+                Widget:
+                Button:
+                    text: 'Create'
+                    size_hint: (4.0, 1.0)
+                    on_press: app.create_movie(title.text, action.active, adventure.active, sci_fi.active)
+                Button:
+                    text: 'Update'
+                    size_hint: (4.0, 1.0)
+                    on_press: app.update_movie(title.text, action.active, adventure.active, sci_fi.active)
+                Button:
+                    text: 'Delete'
+                    size_hint: (4.0, 1.0)
+                    on_press: app.delete_movie(title.text)
+                Widget:
+            BoxLayout:
+                orientation: 'horizontal'
+                Widget:
+                Label:
+                    id: message
+                    text: ''
+                    size_hint: (None, 1.0)
+                    size: self.texture_size
+                Widget:
+
+# All screens are white.
+<Screen>:
+    canvas.before:
+        Color:
+            rgba: (1.0, 1.0, 1.0, 1.0)
+        Rectangle:
+            pos: self.pos
+            size: self.size
+
+# All labels are blue.
+<Label>:
+    color: (0.0, 0.0, 0.75, 1.0)
+
+# All checkboxes are blue.
+<CheckBox>:
+    canvas:
+        Color:
+            rgba: (0.0, 0.0, 0.75, 1.0)
+        Rectangle:
+            source: f'atlas://data/images/defaulttheme/checkbox{"_radio" if self.group else ""}{"_disabled" if self.disabled else ""}{"_on" if self.active else "_off"}'
+            size: sp(32), sp(32)
+            pos: int(self.center_x - sp(16)), int(self.center_y - sp(16))
+
+# All buttons have white text.
+<Button>:
+    color: (1.0, 1.0, 1.0, 1.0)