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NAME

XQueryDeviceState - query the state of an extension input device.
 

SYNTAX

int XQueryDeviceState(Display *display, XDevice *device);

ARGUMENTS

display

Specifies the connection to the X server.

device

Specifies the device whose state is to be queried.

DESCRIPTION

XQueryDeviceState can generate a BadDevice error.  

STRUCTURES

typedef struct {
        XID device_id;
        int num_classes;
        XInputClass *data;
} XDeviceState;

The XValuatorState structure contains:

typedef struct {
        unsigned char class;
        unsigned char length;
        unsigned char num_valuators;
        unsigned char mode;
        int *valuators;
} XValuatorState;

The XKeyState structure contains:

typedef struct {
        unsigned char class;
        unsigned char length;
        short         num_keys;
        char keys[32];
} XKeyState;

The XButtonState structure contains:

typedef struct {
        unsigned char class;
        unsigned char length;
        short         num_buttons;
        char buttons[32];
} XButtonState;

DIAGNOSTICS

BadDevice

An invalid device was specified. The specified device does not exist or has not been opened by this client via XOpenInputDevice. This error may also occur if some other client has caused the specified device to become the X keyboard or X pointer device via the XChangeKeyboardDevice or XChangePointerDevice requests.

SEE ALSO

Index

NAME

SYNTAX

ARGUMENTS

DESCRIPTION

STRUCTURES

DIAGNOSTICS

SEE ALSO

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