Qt for Embedded Linux Environment Variables

These environment variables are relevant to Qt for Embedded Linux users.

变量	描述
POINTERCAL_FILE	Specifies the file containing the data used to calibrate the pointer device. 另请参阅 QWSCalibratedMouseHandler and Qt for Embedded Linux Pointer Handling .
QT_ONSCREEN_PAINT	If defined, the application will render its widgets directly on screen. 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 graphics rendering 文档编制。
QWS_SW_CURSOR	If defined, the software mouse cursor is always used (even when using an accelerated driver that supports a hardware cursor).
QWS_DISPLAY	Specifies the display type and framebuffer. For example, if the current shell is bash, ksh, zsh or sh: export QWS_DISPLAY=<driver>[:<driver specific options>]... [:<display num>] The valid values for the `<driver>` argument are `LinuxFb` , `QVFb` , `VNC` , `Transformed` , `Multi` and keys identifying custom drivers, and the `<display num>` argument is used to separate screens that are using the same screen driver and to enable multiple displays (see the Running Qt for Embedded Linux Applications 文档编制了解更多细节)。 The driver specific options are described in the display management 文档编制。
QWS_SIZE	Specifies the size of the Qt for Embedded Linux window which is centered within the screen. For example, if the current shell is bash, ksh, zsh or sh: export QWS_SIZE=<width>x<height>
QWS_MOUSE_PROTO	Specifies the driver for pointer handling. For example, if the current shell is bash, ksh, zsh or sh: export QWS_MOUSE_PROTO=<driver>[:<driver specific options>] The valid values for the `<driver>` argument are `MouseMan` , `IntelliMouse` , `Microsoft` , `LinuxTP` , `LinuxInput` , `Tslib` and keys identifying custom drivers, and the driver specific options are typically a device, e.g., `/dev/mouse` for mouse devices and `/dev/ts` for touch panels. Multiple mouse drivers can be specified in one go: export QWS_MOUSE_PROTO="<driver>[:<driver specific options>] <driver>[:<driver specific options>] <driver>[:<driver specific options>]" Input will be read from all specified drivers. 另请参阅 Qt for Embedded Linux Pointer Handling .
QWS_KEYBOARD	Specifies the driver and device for character input. For example, if the current shell is bash, ksh, zsh or sh: export QWS_KEYBOARD=<driver>[:<driver specific options>] The valid values for the `<driver>` argument are `TTY` , `LinuxInput` and keys identifying custom drivers, and the driver specific options are typically a device, e.g., `/dev/tty0` . Multiple keyboard drivers can be specified in one go: export QWS_KEYBOARD="<driver>[:<driver specific options>] <driver>[:<driver specific options>] <driver>[:<driver specific options>]" Input will be read from all specified drivers. 另请参阅 Qt for Embedded Linux Character Input .