pycairotk 1.4.9

A Tkinter DrawArea wrapper class for the pycairo package.

A Tkinter DrawArea wrapper class for the pycairo package.

This package provides an alternative to the Tkinter Canvas widget for rendering and displaying graphics objects. The DrawArea widget is a high-level wrapper class for the pycairo package, which implements many of that package's graphics and text rendering capabilities. One of these is the ability to generate sub-pixel graphics resolution by using the anti-aliasing capabilities. Another is the ability to render text and graphics using full 32-bit, RGBA colors.

An important difference from either the Tkinter Canvas widget or the pycairo package, is that the DrawArea widget class was defined to operate in a standard, right-handed coordinate system. This means that the y-axis coordinate value increases from the bottom of the display to the top of the display.

In addition to the DrawArea widget, this package also includes a fully defined Vector class. This class represents a geometric vector in the xy plane, and it is an extremely useful and powerful tool for creating and manipulating graphic objects. In fact, the DrawArea widget was implemented using the Vector class.

In summary, this package adds a fully compatible DrawArea widget to Tkinter's set of graphical user interface widgets, thereby providing the user with a convenient tool for working with the pycairo package in any Tkinter window based application.

Overview

This package provides the following class definitions :

• DrawArea - A Tkinter widget class for rendering and displaying graphics
• BorderStyle - A data class of the available border style options
• Brush - A data class of graphics rendering options
• Font - A data class for describing a text font
• TextStyle - A data class of text rendering options
• Shape - An enumerated class of available datapoint shapes
• LineCap - An enumerated class of available line endpoint options
• LineJoin - An enumerated class of available line junction options
• Antialias - An enumerated class of available rendering options
• Size - A named tuple class of the width and height dimensions of an object
• Vector - A class which represents a geometric vector in the xy plane

The DrawArea widget class provides the rectangular area where the graphics and text objects are rendered and displayed on the screen.

The Antialias and BorderStyle classes are used to specify the configuration and display options for the DrawArea widget class.

The Brush and Shape classes are used to specify the rendering options for the various DrawArea graphics rendering methods.

The LineCap and LineJoin classes are used to specify the line rendering options for the Brush class.

The Font and TextStyle classes are used to specify the rendering options for the DrawArea text rendering method.

The Size and Vector classes not are required for using the DrawArea rendering methods, but are provided as "helper" classes for the user. The Size class is a useful way to specify the dimensions of a graphics object, and the Vector class is a very useful tool for specifying and manipulating the location coordinates of graphic objects.

Documentation

Full documentation for all the classes contained in this package, as well as usage examples, are available at the package's GitHub repository: https://github.com/johnbolk/pycairotk