There is a useful tool provided by Kivy that permits us to recognize the shape of the touch that is performed. In this recipe, we will go through the foundations of using it.
In this recipe, we will use the Kv language for the design of the widgets, so we assume that the reader is familiar with the Kv language. Also, this recipe will use the common button and label widgets for reference.
Follow these steps:
First, in the KV file, define a button and an empty label:
<MyW>: Button: id: button1 pos: 0,0 text: 'Hello' Label: id: label1 pos: 50, 200 text: ''In the class of the widget in the Python code, we need to override the method
on_touch_move.Change the button position to the information in
touch.pos.Change the text in the label when a rectangular shape is present:
import kivy kivy.require('1.9.0') from kivy.app import App from kivy.uix.widget import Widget from kivy.input.shape...