The wxPython tutorial

The Graphics Device Interfacehttp://www.zetcode.com/wxpython/gdi/Python IDEHome ContentsEdit, Test, and Debug Free 30-day Trialwww.wingware.comFree Floor Plan SoftwareMake Floor Plans in Minutes See Examples.Free Download!The GDIThe GDI (Graphics Device Interface) is an interface forworking with graphics. It is used to interact with graphicdevices such as monitor, printer or a file. The GDI allowsprogrammers to display data on a screen or printer withouthaving to be concerned about the details of a particulardevice. The GDI insulates the programmer from the hardware.Figure: The GDI structureFrom the programmer's point of view, the GDI is a group ofclasses and methods for working with graphics. The GDIconsists of 2D Vector Graphics, Fonts and Images.To begin drawing graphics, we must create a device context(DC) object. In wxPython the device context is called wx.DC.The documentation defines wx.DC as a device context ontowhich which graphics and text can be drawn. It representsnumber of devices in a generic way. Same piece of code canwrite to different kinds of devices. Be it a screen or a printer.The wx.DC is not intended to be used directly. Instead aprogrammer should choose one of the derived classes. Eachderived class is intended to be used under specific conditions.Derived wx.DC classes1 de 44 27/04/2008 1:08