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The affected regions of the screen will not be modified by the screen driver unless another window with a higher focus requests (parts of) the same region. Setting this environment variable is equivalent to setting the Qt::WA_PaintOnScreen attribute for all the widgets in the application. See also the Qt for Embedded Linux \l{Qt for Embedded Linux Architecture#Graphics Rendering}{graphics rendering} documentation. \row \o \bold QWS_SW_CURSOR \target QWS_SW_CURSOR \o If defined, the software mouse cursor is always used (even when using an accelerated driver that supports a hardware cursor). \row \o \bold QWS_DISPLAY \target QWS_DISPLAY \o Specifies the display type and framebuffer. For example, if the current shell is bash, ksh, zsh or sh: \snippet doc/src/snippets/code/doc_src_emb-envvars.qdoc 0 The valid values for the \c argument are \c LinuxFb, \c QVFb, \c VNC, \c Transformed, \c Multi and \l {QScreenDriverPlugin::keys()}{keys} identifying custom drivers, and the \c {} argument is used to separate screens that are using the same screen driver and to enable multiple displays (see the \l {Running Qt for Embedded Linux Applications} documentation for more details). The driver specific options are described in the \l{Qt for Embedded Linux Display Management}{display management} documentation. \row \o \bold QWS_SIZE \target QWS_SIZE \o Specifies the size of the \l{Qt for Embedded Linux} window which is centered within the screen. For example, if the current shell is bash, ksh, zsh or sh: \snippet doc/src/snippets/code/doc_src_emb-envvars.qdoc 1 \row \o \bold QWS_MOUSE_PROTO \target QWS_MOUSE_PROTO \o Specifies the driver for pointer handling. For example, if the current shell is bash, ksh, zsh or sh: \snippet doc/src/snippets/code/doc_src_emb-envvars.qdoc 2 The valid values for the \c argument are \c MouseMan, \c IntelliMouse, \c Microsoft, \c VR41xx, \c LinuxTP, \c Yopy. \c Tslib and \l {QMouseDriverPlugin::keys()}{keys} identifying custom drivers, and the driver specific options are typically a device, e.g., \c /dev/mouse for mouse devices and \c /dev/ts for touch panels. Multiple keyboard drivers can be specified in one go: \snippet doc/src/snippets/code/doc_src_emb-envvars.qdoc 3 Input will be read from all specified drivers. Note that the \c Vr41xx driver also accepts two optional arguments: \c press= defining a mouseclick (the default value is 750) and \c filter= specifying the length of the filter used to eliminate noise (the default length is 3). For example: \snippet doc/src/snippets/code/doc_src_emb-envvars.qdoc 4 See also \l {Qt for Embedded Linux Pointer Handling}. \row \o \bold QWS_KEYBOARD \target QWS_KEYBOARD \o Specifies the driver and device for character input. For example, if the current shell is bash, ksh, zsh or sh: \snippet doc/src/snippets/code/doc_src_emb-envvars.qdoc 5 The valid values for the \c argument are \c SL5000, \c Yopy, \c VR41xx, \c TTY, \c USB and \l {QKbdDriverPlugin::keys()}{keys} identifying custom drivers, and the driver specific options are typically a device, e.g., \c /dev/tty0. Multiple keyboard drivers can be specified in one go: \snippet doc/src/snippets/code/doc_src_emb-envvars.qdoc 6 Input will be read from all specified drivers. See also \l {Qt for Embedded Linux Character Input}. \endtable */