Chapter 2. Graphics – The Canvas

Any Kivy Widget contains a Canvas object. Be careful with the name because it might be confusing:

Note

A Canvas is not the place where we draw. Instead, a Canvas contains all the drawing instructions that will render the graphical representation of the Widget.

The coordinate space refers to the place where we draw, what you might have thought to be the canvas is in the first place. In this chapter, you are going to learn how to draw and manipulate the representation of the widgets through the instructions that we add to the Canvas instances:

• Draw basic geometric shapes (straight and curve lines, ellipses and polygons) through vertex instructions

• Using colors and rotating, translating, and scaling the coordinate space through the context instructions

• The difference between vertex and context instructions and how they complement each other

• The three different sets of instructions of the Canvas that we can use to modify the order of execution

• Storing and retrieving...