- Python 2.6 Graphics Cookbook
- Python 2.6 Graphics Cookbook
- Credits
- About the Author
- About the Reviewers
- Preface
- 1. Start your Engines
- Introduction
- Running a shortest Python program
- How to do it...
- Ensuring that the Python modules are present
- How to do it...
- A basic Tkinter program
- How to do it...
- Make a compiled executable under Windows and Linux
- Getting ready
- How it works...
- 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
- 3. Handling Text
- 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
- 5. The Magic of Color
- 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
- 7. Combining Raster and Vector Pictures
- 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
- 9. Exchanging Inkscape SVG Drawings with Tkinter Shapes
- 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
- 11. GUI Construction: Part 2
- appA. Quick tips for running Python programs in Microsoft Windows
In this chapter, we will cover:
- Widget configuration
- Button focus
- The simplest push button with validation
- The data entry box
- Colored button causing message pop-ups
- Complex interaction between buttons
- Images on buttons and widget packing geometry
- The grid geometry manager and button arrays
- Drop-down menus to select from a list
- Listbox
- Text in a window
In this chapter, we provide recipes for the components that are used to create user interfaces of the graphical kind. These are known as GUI or Graphic User Interface. The commonly-used term for GUI components is Widget. The word Widget has no particular meaning other than "general sort of gadget". If you used the example from Chapter 4, Animation Principles on a color-mixing palette, then you would have used the slider or scale widget which will be explained in this chapter. We will also demonstrate that it is not too difficult to create our own widgets.
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