Table Of Contents
Lines Extended Demo¶
This demonstrates how to use the extended line drawing routines such as circles, ellipses, and rectangles. You should see a static image of labelled shapes on the screen.
File canvas/lines_extended.py¶
'''
Lines Extended Demo
===================
This demonstrates how to use the extended line drawing routines such
as circles, ellipses, and rectangles. You should see a static image of
labelled shapes on the screen.
'''
from kivy.app import App
from kivy.uix.gridlayout import GridLayout
from kivy.uix.widget import Widget
from kivy.lang import Builder
Builder.load_string('''
<LineEllipse1>:
canvas:
Color:
rgba: 1, .1, .1, .9
Line:
width: 2.
ellipse: (self.x, self.y, self.width, self.height)
Label:
center: root.center
text: 'Ellipse'
<LineEllipse2>:
canvas:
Color:
rgba: 1, .1, .1, .9
Line:
width: 2.
ellipse: (self.x, self.y, self.width, self.height, 90, 180)
Label:
center: root.center
text: 'Ellipse from 90 to 180'
# fun result with low segments!
<LineEllipse3>:
canvas:
Color:
rgba: 1, .1, .1, .9
Line:
width: 2.
ellipse: (self.x, self.y, self.width, self.height, 90, 720, 10)
Label:
center: root.center
text: 'Ellipse from 90 to 720\\n10 segments'
halign: 'center'
<LineCircle1>:
canvas:
Color:
rgba: .1, 1, .1, .9
Line:
width: 2.
circle:
(self.center_x, self.center_y, min(self.width, self.height)
/ 2)
Label:
center: root.center
text: 'Circle'
<LineCircle2>:
canvas:
Color:
rgba: .1, 1, .1, .9
Line:
width: 2.
circle:
(self.center_x, self.center_y, min(self.width, self.height)
/ 2, 90, 180)
Label:
center: root.center
text: 'Circle from 90 to 180'
<LineCircle3>:
canvas:
Color:
rgba: .1, 1, .1, .9
Line:
width: 2.
circle:
(self.center_x, self.center_y, min(self.width, self.height)
/ 2, 90, 180, 10)
Label:
center: root.center
text: 'Circle from 90 to 180\\n10 segments'
halign: 'center'
<LineCircle4>:
canvas:
Color:
rgba: .1, 1, .1, .9
Line:
width: 2.
circle:
(self.center_x, self.center_y, min(self.width, self.height)
/ 2, 0, 360)
Label:
center: root.center
text: 'Circle from 0 to 360'
halign: 'center'
<LineRectangle>:
canvas:
Color:
rgba: .1, .1, 1, .9
Line:
width: 2.
rectangle: (self.x, self.y, self.width, self.height)
Label:
center: root.center
text: 'Rectangle'
<LineBezier>:
canvas:
Color:
rgba: .1, .1, 1, .9
Line:
width: 2.
bezier:
(self.x, self.y, self.center_x - 40, self.y + 100,
self.center_x + 40, self.y - 100, self.right, self.y)
Label:
center: root.center
text: 'Bezier'
''')
class LineEllipse1(Widget):
pass
class LineEllipse2(Widget):
pass
class LineEllipse3(Widget):
pass
class LineCircle1(Widget):
pass
class LineCircle2(Widget):
pass
class LineCircle3(Widget):
pass
class LineCircle4(Widget):
pass
class LineRectangle(Widget):
pass
class LineBezier(Widget):
pass
class LineExtendedApp(App):
def build(self):
root = GridLayout(cols=2, padding=50, spacing=50)
root.add_widget(LineEllipse1())
root.add_widget(LineEllipse2())
root.add_widget(LineEllipse3())
root.add_widget(LineCircle1())
root.add_widget(LineCircle2())
root.add_widget(LineCircle3())
root.add_widget(LineCircle4())
root.add_widget(LineRectangle())
root.add_widget(LineBezier())
return root
if __name__ == '__main__':
LineExtendedApp().run()