Python - イベントとプロパティ(タッチイベント(on_touch_downメソッド)、2次元座標(絶対座標)、profile(posプロパティ)、ウィジェット(FloatLayout、Button)、大きさ(相対指定、size_hint)、位置(center))

Kivyプログラミング
―Pythonで作るマルチタッチアプリ―
楽天ブックス(Kobo) Yahoo!

開発環境

• macOS Mojave - Apple (OS)
• Emacs (Text Editor)
• Windows 10 Pro (OS)
• Visual Studio Code (Text Editor)
• Python 3.7 (プログラミング言語)
• Kivy (パッケージ)

Kivyプログラミング ―Pythonで作るマルチタッチアプリ― (実践Pythonライブラリー) (原口 和也(著)、久保 幹雄(監修)、朝倉書店)の3(イベントとプロパティ)、3.4(演習問題)、演習3.4の解答を求めてみる。

コード

Python 3

#!/usr/bin/env python3
from kivy.app import App
from kivy.uix.button import Button
from kivy.uix.floatlayout import FloatLayout
from kivy.core.text import LabelBase, DEFAULT_FONT

LabelBase.register(DEFAULT_FONT, 'NotoSansCJKjp-Regular.otf')


class MyFloatLayout(FloatLayout):
    def __init__(self, *args, **kwargs):
        FloatLayout.__init__(self, *args, *kwargs)
        self.no = 1

    def on_touch_down(self, touch):
        print(f'{touch} ({self.no})')
        self.add_widget(Button(text=f'タッチ! ({self.no})',
                               size_hint=[0.2, 0.2],
                               center=touch.pos))
        self.no += 1


class SampleApp(App):
    def build(self):
        float_layout = MyFloatLayout()
        return float_layout


if __name__ == '__main__':
    SampleApp().run()

入出力結果(Terminal, cmd(コマンドプロンプト), Jupyter(IPython))

$ python3 sample4.py
[INFO   ] [Logger      ] Record log in /~...
[INFO   ] [Kivy        ] v1.10.1
[INFO   ] [Python      ] v3.7.1 (default, Oct 21 2018, 09:01:26) 
[Clang 10.0.0 (clang-1000.11.45.2)]
[INFO   ] [Factory     ] 194 symbols loaded
[INFO   ] [Image       ] Providers: img_tex, img_imageio, img_dds, img_sdl2, img_pil, img_gif (img_ffpyplayer ignored)
[INFO   ] [Text        ] Provider: sdl2
[INFO   ] [Window      ] Provider: sdl2
[INFO   ] [GL          ] Using the "OpenGL ES 2" graphics system
[INFO   ] [GL          ] Backend used <gl>
[INFO   ] [GL          ] OpenGL version <b'2.1 INTEL-12.4.7'>
[INFO   ] [GL          ] OpenGL vendor <b'Intel Inc.'>
[INFO   ] [GL          ] OpenGL renderer <b'Intel(R) Iris(TM) Pro Graphics 6200'>
[INFO   ] [GL          ] OpenGL parsed version: 2, 1
[INFO   ] [GL          ] Shading version <b'1.20'>
[INFO   ] [GL          ] Texture max size <16384>
[INFO   ] [GL          ] Texture max units <16>
[INFO   ] [Window      ] auto add sdl2 input provider
[INFO   ] [Window      ] virtual keyboard not allowed, single mode, not docked
[INFO   ] [Base        ] Start application main loop
<MouseMotionEvent spos=(0.5025, 0.6066666666666667) pos=(803.9999999999999, 728.0)> (1)
[INFO   ] [GL          ] NPOT texture support is available
<MouseMotionEvent spos=(0.49875, 0.87) pos=(798.0, 1044.0)> (2)
<MouseMotionEvent spos=(0.8425, 0.6216666666666666) pos=(1348.0, 745.9999999999999)> (3)
<MouseMotionEvent spos=(0.8875, 0.5083333333333333) pos=(1420.0, 610.0)> (4)
<MouseMotionEvent spos=(0.935, 0.07166666666666666) pos=(1496.0, 85.99999999999999)> (5)
<MouseMotionEvent spos=(0.455, 0.02833333333333332) pos=(728.0, 33.999999999999986)> (6)
<MouseMotionEvent spos=(0.09875, 0.08999999999999997) pos=(158.0, 107.99999999999996)> (7)
<MouseMotionEvent spos=(0.0275, 0.5166666666666666) pos=(44.0, 619.9999999999999)> (8)
<MouseMotionEvent spos=(0.0325, 0.97) pos=(52.0, 1164.0)> (9)
<MouseMotionEvent spos=(0.28, 0.7683333333333333) pos=(448.00000000000006, 922.0)> (10)
<MouseMotionEvent spos=(0.43125, 0.39) pos=(690.0, 468.0)> (11)
[INFO   ] [Base        ] Leaving application in progress...
$