The wxPython tutorial

Advanced widgetshttp://www.zetcode.com/wxpython/advanced/Python IDEHome ContentsFaster, Easier Python Development Editor,Debugger, Browser, and moreeXtreme ProgrammingAssistance Technique Java/J2ee, .Net/C#,Python, RubyAdvanced widgets in wxPythonIn the following chapters we will talk about advanced widgets. A bigadvantage of wxPython over a competing PyGTK is the availability of a hugeamount of advanced widgets. PyGTK is a layer over a C based GKT+ toolkit.It does not provide new widgets. In contrast, wxPython is a layer overwxWidgets a C++ based toolkit. wxWidgets consists of a large group ofwidgets. All this widgets are created in C++. wxPython is a glue thatcombines python language with this toolkit. If we want to have a grid widgetin our application using PyGTK, we have to create it ourselves. Such awidget is quite complicated. Not to mention the speed penalty. Dynamiclanguages like Python, PERL or Ruby are not suitable for such tasks.Dynamic languages are great in various areas. They are simple to use. Theyare great for prototyping, in house developing or for studying computerprogramming. If we need a quick solution or we need an application, thatwill change rapidly over a short period of time, dynamic languages aresuperior to compiled languages. On the other hand, if we develop resourceintensive applications, games, high quality multimedia applications, there isno competition to C++.wxPython has several well known advanced widgets. For example a treewidget, an html window, a grid widget, a listbox widget, a list widget or aneditor with advanced styling capabilities. wxPython and wxWidgets are beingdeveloped all the time. New widgets and features emerge with every majorrelease. At the time when I write these words a wxPython 2.8.3.0 has beenreleased just two days ago. (22-Mar-2007).A W X . L I S T B O X W I D G E TA wx.ListBox widget is used for displaying and working with a list of items.As it's name indicates, it is a rectangle that has a list of strings inside. Wecould use it for displaying a list of mp3 files, book names, module names ofa larger project or names of our friends. A wx.ListBox can be created in twodifferent states. In a single selection state or a multiple selection state. Thesingle selection state is the default state. There are two significant events inwx.ListBox. The first one is the wx.EVT_COMMAND_LISTBOX_SELECTEDevent. This event is generated when we select a string in a wx.ListBox. Thesecond one is the wx.EVT_COMMAND_LISTBOX_DOUBLE_CLICKED event. Itis generated when we double click an item in a wx.ListBox. The number ofelements inside a wx.ListBox is limited on GTK platform. According to thedocumentation, it is currently around 2000 elements. Quite enough, I think.The elements are numbered from zero. Scrollbars are displayedautomatically if needed.1 de 21 27/04/2008 1:05