Creating a Simple Paint App using Python kivy

Python kivy is a powerful framework for developing multi-touch applications. In this article, we will explore how to create a simple paint app using Python kivy and ColorPicker.

Setting up the environment

Before we begin, make sure you have Python and kivy installed on your system. You can install kivy using pip:

    pip install kivy
  

Creating the Python code

Now, let’s create a Python script to build our simple paint app. You can use your favorite text editor or IDE to write the following code:

    
      from kivy.app import App
      from kivy.uix.widget import Widget
      from kivy.uix.colorpicker import ColorPicker
      from kivy.graphics import Line

      class PaintWidget(Widget):
          def on_touch_down(self, touch):
              with self.canvas:
                  touch.ud["line"] = Line(points=(touch.x, touch.y))

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

      class PaintApp(App):
          def build(self):
              paint_widget = PaintWidget()
              color_picker = ColorPicker()
              color_picker.bind(color=paint_widget.canvas.add_color)

              return paint_widget

      if __name__ == "__main__":
          PaintApp().run()
    
  

Running the app

Save the above code in a file called paint_app.py. Now, open your terminal and run the app using the following command:

    python paint_app.py
  

Conclusion

With just a few lines of code, we have created a simple paint app using Python kivy. You can now experiment with different features and functionalities to enhance the app further. Happy coding!