Added RoundedRectangle example

examples/canvas/rounded_rectangle.py

@@ -0,0 +1,132 @@
+# -*- coding: utf-8 -*-
+import sys
+from kivy.app import App
+from kivy.uix.widget import Widget
+from kivy.graphics import Color, Ellipse, Rectangle, RoundedRectangle
+from kivy.uix.label import Label
+from kivy.lang import Builder
+from kivy.factory import Factory
+
+TEXTURE = 'kiwi.jpg'
+YELLOW = (1, .7, 0)
+ORANGE = (1, .45, 0)
+RED = (1, 0, 0)
+WHITE = (1, 1, 1)
+
+
+class RoundedRectangleWidget(Widget):
+    def prepare(self):
+        with self.canvas:
+            Color(*WHITE)
+
+            # Rectangle of default size 100x100
+            Rectangle(pos=(50, 400))
+
+            # RoundedRectangles of default size 100x100:
+
+            # Textured:
+            RoundedRectangle(pos=(175, 400), radius=[0, 50, 0, 50], source=TEXTURE)
+
+            # Colored:
+            Color(*YELLOW)
+            RoundedRectangle(pos=(300, 400), radius=[0, 50, 0, 50])
+
+            # Textured + Colored
+            # Color(.3,.3,.3, 1)
+            RoundedRectangle(pos=(425, 400), radius=[0, 50, 0, 50], source=TEXTURE)
+
+            # Possible radius arguments:
+            # 1) Same value for each corner
+            Color(*ORANGE)
+
+            # With same radius 20x20
+            RoundedRectangle(pos=(50, 275), radius=[20])
+
+            # With same radius dimensions 20x40
+            RoundedRectangle(pos=(175, 275), radius=[(20, 40)])
+
+            # 2) Different values for each corner
+            Color(*RED)
+
+            # With different radiuses NxN:
+            RoundedRectangle(pos=(300, 275), radius=[10, 20, 30, 40])
+
+            # With different radiuses:
+            RoundedRectangle(pos=(425, 275), radius=[(10, 20), (20, 30), (30, 40), (40, 50)])
+
+            # Default ellipses
+            Color(*WHITE)
+            Ellipse(pos=(50, 150))
+            Ellipse(pos=(175, 150))
+            Ellipse(pos=(300, 150))
+            Ellipse(pos=(425, 150))
+
+            # Radius dimensions can't be bigger than half of the figure side
+            RoundedRectangle(pos=(175, 150), radius=[9000], source=TEXTURE)
+
+            # Segments parameter defines how many segments each corner has.
+            # More segments - more roundness
+            Color(*RED)
+            RoundedRectangle(pos=(300, 150), radius=[9000])
+            RoundedRectangle(pos=(425, 150), radius=[9000], segments=15)
+
+            Color(*ORANGE)
+            RoundedRectangle(pos=(425, 150), radius=[9000], segments=2)
+
+            Color(*YELLOW)
+            RoundedRectangle(pos=(425, 150), radius=[9000], segments=1)
+
+            # Various sizes
+            # if radius dimension is 0, then the corner will be sharp (90 degrees)
+            RoundedRectangle(pos=(50, 25), radius=[30], segments=1, size=(125, 100))
+
+            Color(*ORANGE)
+            RoundedRectangle(pos=(200, 25), radius=[40, 50, 50, 0], size=(125, 100))
+
+            Color(*RED)
+            RoundedRectangle(pos=(350, 25), radius=[(40, 20), (20, 40), (0, 40), (40, 0)], size=(150, 100))
+
+
+class DrawRoundedRectanglesApp(App):
+    def build(self):
+        kv = '''
+Widget:
+    canvas:
+        Color:
+            rgba: 1, 1,1, 1
+
+        RoundedRectangle:
+            pos: 575, 400
+            size: 100, 100
+            radius: [0, 50, 0, 50]
+            source: 'kiwi.jpg'
+
+        Color:
+            rgba: 0, 0.8, 0.8, 1
+
+        RoundedRectangle:
+            pos: 575, 275
+            size: 100, 100
+            radius: [(10, 20), (20, 30), (30, 40), (40, 50)]
+
+        RoundedRectangle:
+            pos: 575, 150
+            size: 100, 100
+            radius: [9000]
+            segments: 15
+
+        RoundedRectangle:
+            pos: 550, 25
+            size: 150, 100
+            segments: 1
+            radius: [30, 30, 0, 0]
+
+'''
+        widget = RoundedRectangleWidget()
+        widget.prepare()
+        kvrect = Builder.load_string(kv)
+        widget.add_widget(kvrect)
+        return widget
+
+if __name__ == '__main__':
+    DrawRoundedRectanglesApp().run()