To select input from an extended input device, use
XHPSelectExtensionEvent.
XHPSelectExtensionEvent(display, window, deviceid,
mask)
Display *display;
Window window;
XID deviceid;
Mask mask; |
Title not available (Selecting Input From Extended Input Devices )
- display
Specifies the connection to the X server.
- window
Specifies the window ID. Client applications interested
in an event for a particular window pass that window's ID.
- deviceid
Specifies the device from which input is desired.
- mask
Specifies the mask of input events.
The XHPSelectExtensionEvent
function is provided to support the use of input devices other than
the X keyboard and X pointer device. It allows input from extended
input devices, selected independently of those events generated
by the X pointer and keyboard.
XHPSelectExtensionEvent
requests that the server send an extended event that matches the
specified event mask and is issued from the specified device and
window. To use this function, the client program must first determine
the appropriate deviceid
by using the XHPListInputDevices
function, and the appropriate event mask by using the XHPGetExtEventMask
function. Multiple event masks returned by XHPGetExtEventMask
may be ORed together and specified in a single request to XHPSelectExtensionEvent.
XHPSelectExtensionEvent
cannot be used to select any of the core X events, or to receive
input from the X pointer or keyboard devices. Use the XSelectInput
function for that purpose.
XHPSelectExtensionEvent
can generate BadDevice
and BadWindow
errors.
