Window System Specific Notes

Qt is a cross-platform GUI toolkit, so almost the entire API is the same on all platforms and window systems. If you wish to use platform-specific features, and still maintain a platform-independent source tree, you should protect the platform-specific code using the appropriate #ifdef directives (see below).

Qt provides a few low-level global functions for fine-tuning applications on specific platforms. See Special-Purpose Global Functions Exported by Qt for details.

• Qt/X11
• Qt/Windows
• Qt/Mac OS X
• Qtopia Core (Qt for Embedded Linux)

For information about which platforms are supported by Qt, see the Platform Notes. For information on distributing Qt applications, see Deploying Qt Applications.

Qt/X11

When compiling for this platform, the macro Q_WS_X11 is defined.

Not documented here. Please contact Trolltech Technical Support if you have queries.

Note: You must compile with both Xft and XRender support to get alpha transparency support for pixmaps and images. Configuring with XRender support alone is not enough.

Qt/Windows

When compiling for this platform, the macro Q_WS_WIN is defined.

Not documented here. Please contact Trolltech Technical Support if you have queries.

Qt/Mac OS X

When compiling for this platform, the macro Q_WS_MAC is defined.

• Qt/Mac-Specific Issues
• Qt/Mac is Mac OS X Native

Qtopia Core (Qt for Embedded Linux)

When compiling for this platform, the macro Q_WS_QWS is defined (the window system is literally the Qt Window System). See the Qtopia Core documentation for more information.