kivy: improve settings dialog

gui/kivy/uix/dialogs/checkbox_dialog.py

@@ -0,0 +1,52 @@
+from kivy.app import App
+from kivy.factory import Factory
+from kivy.properties import ObjectProperty
+from kivy.lang import Builder
+
+Builder.load_string('''
+<CheckBoxDialog@Popup>
+    id: popup
+    title: ''
+    size_hint: 0.8, 0.5
+    pos_hint: {'top':0.9}
+    BoxLayout:
+        orientation: 'vertical'
+        Label:
+            id: description
+            text: ''
+            size_hint: 1, 1
+            halign: 'left'
+            text_size: self.width, None
+        BoxLayout:
+            orientation: 'horizontal'
+            size_hint: 1, 1
+            Label:
+                text: _('Enable')
+            CheckBox:
+                id:cb
+        Widget:
+            size_hint: 1, 1
+        BoxLayout:
+            orientation: 'horizontal'
+            size_hint: 1, 0.5
+            Button:
+                text: 'Cancel'
+                size_hint: 0.5, None
+                height: '48dp'
+                on_release: popup.dismiss()
+            Button:
+                text: 'OK'
+                size_hint: 0.5, None
+                height: '48dp'
+                on_release:
+                    root.callback(cb.active)
+                    popup.dismiss()
+''')
+
+class CheckBoxDialog(Factory.Popup):
+    def __init__(self, title, text, status, callback):
+        Factory.Popup.__init__(self)
+        self.ids.cb.active = status
+        self.ids.description.text = text
+        self.callback = callback
+        self.title = title