commiting in case the kivy trial fails

freechat-client/share/kivy-examples/widgets/recycleview/basic_data.py

@@ -0,0 +1,119 @@
+from random import sample
+from string import ascii_lowercase
+
+from kivy.app import App
+from kivy.lang import Builder
+from kivy.uix.boxlayout import BoxLayout
+
+
+kv = """
+<Row@BoxLayout>:
+    canvas.before:
+        Color:
+            rgba: 0.5, 0.5, 0.5, 1
+        Rectangle:
+            size: self.size
+            pos: self.pos
+    value: ''
+    Label:
+        text: root.value
+
+<Test>:
+    canvas:
+        Color:
+            rgba: 0.3, 0.3, 0.3, 1
+        Rectangle:
+            size: self.size
+            pos: self.pos
+    rv: rv
+    orientation: 'vertical'
+    GridLayout:
+        cols: 3
+        rows: 2
+        size_hint_y: None
+        height: dp(108)
+        padding: dp(8)
+        spacing: dp(16)
+        Button:
+            text: 'Populate list'
+            on_press: root.populate()
+        Button:
+            text: 'Sort list'
+            on_press: root.sort()
+        Button:
+            text: 'Clear list'
+            on_press: root.clear()
+        BoxLayout:
+            spacing: dp(8)
+            Button:
+                text: 'Insert new item'
+                on_press: root.insert(new_item_input.text)
+            TextInput:
+                id: new_item_input
+                size_hint_x: 0.6
+                hint_text: 'value'
+                padding: dp(10), dp(10), 0, 0
+        BoxLayout:
+            spacing: dp(8)
+            Button:
+                text: 'Update first item'
+                on_press: root.update(update_item_input.text)
+            TextInput:
+                id: update_item_input
+                size_hint_x: 0.6
+                hint_text: 'new value'
+                padding: dp(10), dp(10), 0, 0
+        Button:
+            text: 'Remove first item'
+            on_press: root.remove()
+
+    RecycleView:
+        id: rv
+        scroll_type: ['bars', 'content']
+        scroll_wheel_distance: dp(114)
+        bar_width: dp(10)
+        viewclass: 'Row'
+        RecycleBoxLayout:
+            default_size: None, dp(56)
+            default_size_hint: 1, None
+            size_hint_y: None
+            height: self.minimum_height
+            orientation: 'vertical'
+            spacing: dp(2)
+"""
+
+Builder.load_string(kv)
+
+
+class Test(BoxLayout):
+
+    def populate(self):
+        self.rv.data = [{'value': ''.join(sample(ascii_lowercase, 6))}
+                        for x in range(50)]
+
+    def sort(self):
+        self.rv.data = sorted(self.rv.data, key=lambda x: x['value'])
+
+    def clear(self):
+        self.rv.data = []
+
+    def insert(self, value):
+        self.rv.data.insert(0, {'value': value or 'default value'})
+
+    def update(self, value):
+        if self.rv.data:
+            self.rv.data[0]['value'] = value or 'default new value'
+            self.rv.refresh_from_data()
+
+    def remove(self):
+        if self.rv.data:
+            self.rv.data.pop(0)
+
+
+class TestApp(App):
+    def build(self):
+        return Test()
+
+
+if __name__ == '__main__':
+    TestApp().run()