Python 2.6 Graphics Cookbook

Cover
Copyright
Credits
About the Author
About the Reviewers
Table of Contents
Preface
Chapter 1: Start your Engines
Introduction
Running a shortest Python program
Ensuring that the Python modules are present
A basic Tkinter program
Make a compiled executable under Windows and Linux
Chapter 2: Drawing Fundamental Shapes
Introduction
A straight line and the coordinate system
Draw a dashed line
Lines of varying styles with arrows and endcaps
A two segment line with a sharp bend
A line with a curved bend
Drawing intricate shapes – the curly vine
Draw a rectangle
Draw overlapping rectangles
Draw concentric squares
A circle from an oval
A circle from an arc
Three arc ellipses
Polygons
A star polygon
Cloning and resizing stars
Chapter 3: Handling Text
Introduction
Simple text
Text font type, size, and color
Alignment of text – left and right justify
All the fonts available on your computer
Chapter 4: Animation Principles
Introduction
Static shifting of a ball
Time-controlled shifting of a ball
Complete animation using draw-move-pause-erase cycles
More than one moving object
A ball that bounces
Bouncing in a gravity field
Precise collisions using floating point numbers
Trajectory tracing and ball-to-ball collisions
Rotating line
Trajectory tracing on multiple line rotations
A rose for you
Chapter 5: The Magic of Color
Introduction
A limited palette of named colors
Nine ways of specifying color
A red beachball of varying hue
A red color wedge of graded hue
Newton's grand wheel of color mixing
The numerical color mixing matching palette
The animated graded color wheel
Tkinter's own color picker-mixer
Chapter 6: Working with Pictures
Opening an image file and discovering its attributes
Open, view, and save an image in a different file format
Image format conversion for JPEG, PNG, TIFF, GIF, BMP
Image rotation in the plane of the image
Image size alteration
Correct proportion image resizing
Separating one color band in an image
Red, green, and blue color alteration in images
Slider controlled color manipulation
Combining images by blending
Blending images by varying percentages
Make a composite image using a mask image
Offset (roll) image horizontally and vertically
Flip horizontally, vertically, and rotate
Filter effects: blur, sharpen, contrast, and so on
Chapter 7: Combining Raster and Vector Pictures
Simple animation of a GIF beach ball
The vector walking creature
Bird with shoes walking in the Karroo
Making GIF images with transparent backgrounds using GIMP
Diplomat walking at the palace
Spider in the forest
Moving band of images
Continuous band of images
Endless background
Chapter 8: Data In and Data Out
Introduction
Creation of a new file on a hard drive
Writing data to a newly-created file
Writing data to multiple files
Adding data to existing files
Saving a Tkinter-drawing shape to disk
Retrieving Python data from disk storage
Simple mouse input
Storing and retrieving a mouse-drawn shape
A mouse-line editor
All possible mouse actions
Chapter 9: Exchanging Inkscape SVG Drawings with Tkinter Shapes
Introduction
The structure of an SVG drawing
Tracing the shape of an image in Inkscape
Converting an SVG path into a Tkinter Line
Chapter 10: GUI Construction: Part 1
Introduction
Widget configuration – a label
Button focus
The simplest push button with validation
A data entry box
Colored button causing a message pop-up
Complex interaction between buttons
Images on buttons and button packing
Grid Geometry Manager and button arrays
Drop-down menus to select from a list
Listbox variable selection
Text in a window
Chapter 11: GUI Construction: Part 2
Introduction
The Grid Layout Geometry Manager
The Pack Geometry Manager
Radiobuttons to select one from many
Checkbuttons (Tickboxes) to select some of many
Key-stroke event handling
Scrollbar
Custom DIY controller widgets
Organizing widgets inside frames
Appendix: Quick tips for running Python programs in Microsoft Windows
Running Python programs in Microsoft Windows
Where will we find the windows installer?
Do we have to use Python version 2.7?
Why do we get "python is not recognized…"
Index