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  • Book Overview & Buying wxPython Application Development Cookbook
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wxPython Application Development Cookbook

wxPython Application Development Cookbook

By : Precord
3.5 (6)
Buy this Book
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wxPython Application Development Cookbook

wxPython Application Development Cookbook

3.5 (6)
By: Precord
Buy this Book

Overview of this book

wxPython is a GUI toolkit for the Python programming language built on top of the cross-platform wxWidgets GUI libraries. wxPython provides a powerful set of tools that allow you to quickly and efficiently building applications that can run on a variety of different platforms. Since wxWidgets provides a wrapper around each platform’s native GUI toolkit, the applications built with wxPython will have a native look and feel wherever they are deployed. This book will provide you with the skills to build highly functional and native looking user interfaces for Python applications on multiple operating system environments. By working through the recipes, you will gain insights into and exposure to creating applications using wxPython. With a wide range of topics covered in the book, there are recipes to get the most basic of beginners started in GUI programming as well as tips to help experienced users get more out of their applications. The recipes will take you from the most basic application constructs all the way through to the deployment of complete applications.
Table of Contents (12 chapters)
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Preface
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Preface
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What this book covers
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What you need for this book
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Who this book is for
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Sections
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Conventions
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Reader feedback
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Customer support
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1
1. wxPython Starting Points
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1. wxPython Starting Points
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Introduction
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Creating an application object
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Adding the main frame
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Using bitmaps
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Binding to events
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Understanding the hierarchy of the UI
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Controlling the propagation of events
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Accessing the clipboard
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Supporting drag and drop
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Handling AppleEvents
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2. Common User Controls
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2. Common User Controls
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Introduction
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Starting with the easy button
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Pushing all the buttons
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Offering options with CheckBoxes
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Using TextCtrl
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Processing key events
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Picking dates with DatePickerCtrl
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Exploring menus and shortcuts
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Displaying a context menu
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Working with ToolBars
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Managing UI states
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3. UI Layout and Organization
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3. UI Layout and Organization
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Introduction
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Laying out controls with Sizers
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Controlling layout behavior
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Grouping controls with a StaticBox control
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Creating an automatic wrapping layout
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Using the standard dialog button sizer
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Simplifying the panel layout
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Making dialog layout easy
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Building XML resource-based layouts
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Extending XRC for custom controls
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Advancing your UI with AuiManager
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4. Containers and Advanced Controls
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4. Containers and Advanced Controls
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Introduction
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Adding tabs with the Notebook control
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Enhancing ComboBox with bitmaps
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Configuring properties
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Taking control with FlatNotebook
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Styling text in StyledTextCtrl
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Annotating StyledTextCtrl
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Displaying hierarchical data with TreeCtrl
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Building a system tray application
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Surfing the Web in your app
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5. Data Displays and Grids
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5. Data Displays and Grids
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Introduction
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Displaying lists of data
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Editing data lists
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Implementing a data source
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Getting started with the data grid
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Displaying dynamic data
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Modeling your data
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Displaying your data model
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6. Ways to Notify and Alert
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6. Ways to Notify and Alert
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Introduction
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Showing MessageBox
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Using InfoBar
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Providing extra tips on usage
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Displaying transient notifications
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Making a splash at startup
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Giving busy feedback
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Showing information about your app
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7. Requesting and Retrieving Information
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7. Requesting and Retrieving Information
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Introduction
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Selecting files with FileDialog
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Searching text with FindReplaceDialog
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Filtering through choices
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Retrieving multiple selections
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Using Print dialogs
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Guiding selections with Wizard
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8. User Interface Primitives
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8. User Interface Primitives
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Introduction
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Painting in your UI
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Drawing basic shapes
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Customizing grid labels
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Drawing gradients with GraphicsContext
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Recreating native controls with RendererNative
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9. Creating and Customizing Components
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9. Creating and Customizing Components
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Introduction
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Making your own dialog
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Validating user input
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Interacting with StatusBar
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Providing your own information window
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Creating a managed layout
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Drawing your own list control
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Implementing highlighting in StyledTextCtrl
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Creating a composite control
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Designing an owner-drawn control
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10. Getting Your Application Ready for Release
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10. Getting Your Application Ready for Release
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Introduction
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Storing your configuration with StandardPaths
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Saving the application's state
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Supporting internationalization
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Optimizing for OS X
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Handling errors gracefully
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Embedding your resources
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Distributing an application
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Updating your software
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Index
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Index

Using bitmaps

Bitmaps are the basic data type used to represent images in an application. The wx.Bitmap object can seamlessly load and decompress most common image file formats into a common representation that is usable by many UI controls. Adding bitmaps to the controls can make a UI more intuitive and easier to use.

How to do it…

Perform the following steps:

  1. Let's start this time by making a subclass of wx.Panel to use as the container for the control that will show our bitmap on the screen, as follows:
    class ImagePanel(wx.Panel):
    def __init__(self, parent):
        super(ImagePanel, self).__init__(parent)
        
        # Load the image data into a Bitmap
        theBitmap = wx.Bitmap("usingBitmaps.png")
        
        # Create a control that can display the
        # bitmap on the screen.
        self.bitmap = wx.StaticBitmap(self, bitmap=theBitmap)
  2. Next, we will create an instance of the panel in a frame:
    class MyFrame(wx.Frame):
    def __init__(self, parent, title=""):
        super(MyFrame, self).__init__(parent, title=title)
        
        # Set the panel
        self.panel = ImagePanel(self)
  3. Run it and see the image shown on the panel:
    How to do it…

How it works…

The Bitmap class is used to load image data from the usingBitmaps.png file, which is located in the same directory as the script. This loads the PNG file data into a bitmap object, which can be used by the controls.

In this example, we used the StaticBitmap control, which is one of the easiest ways to display a bitmap in the UI. This control takes the bitmap data object and handles drawing it on the screen.

There's more…

In this recipe, we used a PNG file as the source for the bitmap, but wx.Bitmap also supports a wide range of other image formats, such as BMP, GIF, ICO, ICON, JPEG, TIF, XBM, XPM, and several others, depending on the build of wxWidgets used by wxPython.

Visually different images
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wxPython Application Development Cookbook
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