NAME

       XIChangeHierarchy - change the device hierarchy.

SYNOPSIS

       #include <X11/extensions/XInput2.h>

       Status XIChangeHierarchy( Display *display,
                                 XIAnyHierarchyChangeInfo *changes,
                                 int num_changes);

       display
              Specifies the connection to the X server.

       num_changes
              Specifies the number of elements in changes.

       changes
              Specifies the changes to be made.

DESCRIPTION

           XIChangeHierarchy modifies the device hierarchy by creating or
           removing master devices or changing the attachment of slave
           devices. If num_changes is non-zero, changes is an array of
           XIAnyHierarchyChangeInfo structures. If num_changes is equal or less than
           zero, XIChangeHierarchy does nothing.

           XIChangeHierarchy processes changes in order, effective
           immediately. If an error occurs, processing is aborted and the
           error is reported to the client. Changes already made remain
           effective.

           The list of changes is any combination of
           XIAnyHierarchyChangeInfo. The type of a hierarchy change can be
           XIAddMaster, XIRemoveMaster, XIAttachSlave or XIDetachSlave.

           typedef union {
               int type;
               XIAddMasterInfo add;
               XIRemoveMasterInfo remove;
               XIAttachSlave attach;
               XIDetachSlave detach;
           } XIAnyHierarchyChangeInfo;

           typedef struct {
               int type; /* XIAddMaster */
               char* name;
               Bool send_core;
               Bool enable;
           } XIAddMasterInfo;

           typedef struct {
               int type; /* XIRemoveMaster */
               int deviceid;
               int return_mode;
               int return_pointer;
               int return_keyboard;
           } XIRemoveMasterInfo;

           typedef struct {
               int type; /* XIAttachSlave */
               int deviceid;
               int new_master;
           } XIAttachSlaveInfo;

           typedef struct {
               int type; /* XIDetachSlave */
               int deviceid;
           } XIDetachSlaveInfo;

           XIAddMasterInfo creates a new master pointer and a new
           master keyboard labeled "name pointer" and "name keyboard"
           respectively. If sendCore is True, the devices will send core
           events. If enable is True, the device is enabled immediately.

           XIAddMasterInfo can generate a BadValue error.

           XIRemoveMasterInfo removes device and its paired master device.
           If returnMode is XIAttachToMaster, all pointers attached to
           device or its paired master device are attached to
           returnPointer. Likewise, all keyboards are attached to
           returnKeyboard. If returnMode is XIFloating, all attached
           devices are set to floating.

           XIRemoveMasterInfo can generate a BadValue and a BadDevice
           error.

           XIAttachSlaveInfo attaches device to new_master. If the device
           is currently attached to a master device, it is detached from
           the master device and attached to the new master device.

           XIAttachSlaveInfo can generate a BadDevice error.

           XIDetachSlaveInfo detaches device from the current master
           device and sets it floating. If the device is already floating,
           no changes are made.

           XIDetachSlaveInfo can generate a BadDevice error.

           XIChangeHierarchy generates an XIHierarchyEvent if any
           modifications were successful.

DIAGNOSTICS

           BadDevice
                  An invalid device was specified. The device does not
                  exist or is not a appropriate for the type of change.

           BadValue
                  Some numeric value falls out of the allowed range.

                                            09/15/2021                       XICHANGEHIERARCHY(3)