'\" t
.\"     Title: xichangehierarchy
.\"    Author: [FIXME: author] [see http://www.docbook.org/tdg5/en/html/author]
.\" Generator: DocBook XSL Stylesheets vsnapshot <http://docbook.sf.net/>
.\"      Date: 05/04/2023
.\"    Manual: \ \&
.\"    Source: \ \&
.\"  Language: English
.\"
.TH "XICHANGEHIERARCHY" "3" "05/04/2023" "\ \&" "\ \&"
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.SH "NAME"
XIChangeHierarchy \- change the device hierarchy\&.
.SH "SYNOPSIS"
.sp
.nf
#include <X11/extensions/XInput2\&.h>
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Status XIChangeHierarchy( Display *display,
                          XIAnyHierarchyChangeInfo *changes,
                          int num_changes);
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.nf
display
       Specifies the connection to the X server\&.
.fi
.sp
.nf
num_changes
       Specifies the number of elements in changes\&.
.fi
.sp
.nf
changes
       Specifies the changes to be made\&.
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.SH "DESCRIPTION"
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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\&.
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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\&.
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The list of changes is any combination of
XIAnyHierarchyChangeInfo\&. The type of a hierarchy change can be
XIAddMaster, XIRemoveMaster, XIAttachSlave or XIDetachSlave\&.
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typedef union {
    int type;
    XIAddMasterInfo add;
    XIRemoveMasterInfo remove;
    XIAttachSlave attach;
    XIDetachSlave detach;
} XIAnyHierarchyChangeInfo;
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typedef struct {
    int type; /* XIAddMaster */
    char* name;
    Bool send_core;
    Bool enable;
} XIAddMasterInfo;
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typedef struct {
    int type; /* XIRemoveMaster */
    int deviceid;
    int return_mode;
    int return_pointer;
    int return_keyboard;
} XIRemoveMasterInfo;
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typedef struct {
    int type; /* XIAttachSlave */
    int deviceid;
    int new_master;
} XIAttachSlaveInfo;
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typedef struct {
    int type; /* XIDetachSlave */
    int deviceid;
} XIDetachSlaveInfo;
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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\&.
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XIAddMasterInfo can generate a BadValue error\&.
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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\&.
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XIRemoveMasterInfo can generate a BadValue and a BadDevice
error\&.
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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\&.
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XIAttachSlaveInfo can generate a BadDevice error\&.
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XIDetachSlaveInfo detaches device from the current master
device and sets it floating\&. If the device is already floating,
no changes are made\&.
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XIDetachSlaveInfo can generate a BadDevice error\&.
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XIChangeHierarchy generates an XIHierarchyEvent if any
modifications were successful\&.
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.SH "DIAGNOSTICS"
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BadDevice
       An invalid device was specified\&. The device does not
       exist or is not a appropriate for the type of change\&.
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BadValue
       Some numeric value falls out of the allowed range\&.
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.RE
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