add example application with ConfigParserProperty

examples/application/app_with_config.py

@@ -0,0 +1,43 @@
+from kivy.app import App
+from kivy.lang import Builder
+from kivy.properties import ConfigParserProperty
+
+KV = '''
+FloatLayout:
+    BoxLayout:
+        size_hint: .5, .5
+        pos_hint: {'center': (.5, .5)}
+
+        orientation: 'vertical'
+
+        TextInput:
+            text: app.text
+            on_text: app.text = self.text
+
+        Slider:
+            min: 0
+            max: 100
+            value: app.number
+            on_value: app.number = self.value
+'''
+
+
+class ConfigApp(App):
+    number = ConfigParserProperty(0, 'general', 'number', 'app', val_type=float)
+    text = ConfigParserProperty('', 'general', 'text', 'app', val_type=str)
+
+    def build_config(self, config):
+        config.setdefaults(
+            'general',
+            {
+                'number': 0,
+                'text': 'test'
+            }
+        )
+
+    def build(self):
+        return Builder.load_string(KV)
+
+
+if __name__ == '__main__':
+    ConfigApp().run()