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【Python GUI库】Kivy概览 ​

1.简介 ​

1.1.Kivy ​

Kivy: Cross-platform Python Framework for NUI Development.

Kivy - Open source Python library for rapid development of applications that make use of innovative user interfaces, such as multi-touch apps.

官网：https://kivy.org/

1.2.Feature ​

  • Python UI库
  • 跨平台：Linux, Windows, OS X, Android, iOS, Raspbery Pi
    • 支持多种输入设备和协议：WM_Touch, WM_Pen, Mac OS X Trackpad and Magic Mouse, Mtdev, Linux Kernel HID, TUIO等。
  • MIT协议
  • GPU加速：图形引擎基于OpenGL ES 2；自带20多种Widget；

2.Demo ​

2.1.安装 ​

shell
pip install kivy

2.2.Demo ​

python
from random import random
from kivy.app import App
from kivy.uix.widget import Widget
from kivy.uix.button import Button
from kivy.graphics import Color, Ellipse, Line


class MyPaintWidget(Widget):

    def on_touch_down(self, touch):
        color = (random(), 1, 1)
        with self.canvas:
            Color(*color, mode='hsv')
            d = 30.
            Ellipse(pos=(touch.x - d / 2, touch.y - d / 2), size=(d, d))
            touch.ud['line'] = Line(points=(touch.x, touch.y))

    def on_touch_move(self, touch):
        touch.ud['line'].points += [touch.x, touch.y]


class MyPaintApp(App):

    def build(self):
        parent = Widget()
        self.painter = MyPaintWidget()
        clearbtn = Button(text='Clear')
        clearbtn.bind(on_release=self.clear_canvas)
        parent.add_widget(self.painter)
        parent.add_widget(clearbtn)
        return parent

    def clear_canvas(self, obj):
        self.painter.canvas.clear()


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

参考：https://kivy.org/doc/stable/tutorials/firstwidget.html

运行 ​

![image-20211208233335395](【Python GUI库】Kivy概览.assets/image-20211208233335395.png)

2.3.打包 ​

  • Windows: PyInstanller

参考：https://kivy.org/doc/stable/guide/packaging-windows.html#packaging-windows-requirements

3.总结 ​

  • 支持GPU加速，图形性能应该不错，可以考虑用来开发工具软件。