1XGETDEVICEMODIFIERMA(3)                                XGETDEVICEMODIFIERMA(3)
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NAME

6       XGetDeviceModifierMapping, XSetDeviceModifierMapping - query or change
7       device modifier mappings
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SYNOPSIS

10       #include <X11/extensions/XInput.h>
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12       int XSetDeviceModifierMapping( Display *display,
13                                      XDevice *device,
14                                      XModifierKeymap *modmap);
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16       XModifierKeymap *XGetDeviceModifierMapping( Display *display,
17                                                   XDevice *device);
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19       display
20              Specifies the connection to the X server.
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22       device
23              Specifies the device whose modifier mapping is to be
24              queried or modified.
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26       modmap
27              Specifies a pointer to the XModifierKeymap structure.
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DESCRIPTION

30           The XSetDeviceModifierMapping request specifies the KeyCodes of
31           the keys (if any) that are to be used as modifiers for the
32           specified device. If it succeeds, the X server generates a
33           DeviceMappingNotify event, and XSetDeviceModifierMapping
34           returns MappingSuccess. X permits at most eight modifier keys.
35           If more than eight are specified in the XModifierKeymap
36           structure, a BadLength error results.
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38           The modifiermap member of the XModifierKeymap structure
39           contains eight sets of max_keypermod KeyCodes, one for each
40           modifier in the order Shift, Lock, Control, Mod1, Mod2, Mod3,
41           Mod4, and Mod5. Only nonzero KeyCodes have meaning in each set,
42           and zero KeyCodes are ignored. In addition, all of the nonzero
43           KeyCodes must be in the range specified by min_keycode and
44           max_keycode as returned by XListInputDevices, or a BadValue
45           error results. No KeyCode may appear twice in the entire map,
46           or a BadValue error results.
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48           An X server can impose restrictions on how modifiers can be
49           changed, for example, if certain keys do not generate up
50           transitions in hardware, if auto-repeat cannot be disabled on
51           certain keys, or if multiple modifier keys are not supported.
52           If some such restriction is violated, the status reply is
53           MappingFailed, and none of the modifiers are changed. If the
54           new KeyCodes specified for a modifier differ from those
55           currently defined and any (current or new) keys for that
56           modifier are in the logically down state,
57           XSetDeviceModifierMapping returns MappingBusy, and none of the
58           modifiers is changed.
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60           XSetDeviceModifierMapping can generate BadLength, BadDevice,
61           BadMatch, BadAlloc, and BadValue errors.
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63           The XGetDeviceModifierMapping request returns a pointer to a
64           newly created XModifierKeymap structure that contains the keys
65           being used as modifiers. The structure should be freed after
66           use by calling XFreeModifierMapping . If only zero values
67           appear in the set for any modifier, that modifier is disabled.
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69           XGetDeviceModifierMapping can generate BadDevice and BadMatch
70           errors.
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72       Structures
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74           The XModifierKeymap structure contains:
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76           typedef struct {
77           int max_keypermod;
78           KeyCode *modifiermap;
79           } XModifierKeymap;
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DIAGNOSTICS

82           BadLength
83                  More than eight keys were specified in the
84                  XModifierKeymap structure.
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86           BadAlloc
87                  The server failed to allocate the requested resource or
88                  server memory.
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90           BadDevice
91                  An invalid device was specified. The specified device
92                  does not exist or has not been opened by this client via
93                  XOpenInputDevice. This error may also occur if the
94                  specified device is the X keyboard or X pointer device.
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96           BadMatch
97                  This error may occur if an XGetDeviceModifierMapping or
98                  XChangeDeviceModifierMapping request was made specifying
99                  a device that has no keys.
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101           BadValue
102                  Some numeric value falls outside the range of values
103                  accepted by the request. Unless a specific range is
104                  specified for an argument, the full range defined by the
105                  argument's type is accepted. Any argument defined as a
106                  set of alternatives can generate this error.
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SEE ALSO

109           XSetDeviceKeyMapping(3), XSetDeviceButtonMapping(3)
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113                                  06/19/2019           XGETDEVICEMODIFIERMA(3)
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