83 lines
3 KiB
C
83 lines
3 KiB
C
/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
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/*
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* Copyright (C) 2015 Red Hat
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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* 02111-1307, USA.
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*
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* Written by:
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* Jonas Ådahl <jadahl@gmail.com>
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*/
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/**
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* SECTION:meta-pointer-constraint
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* @title: MetaPointerConstraint
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* @short_description: Pointer client constraints.
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*
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* A MetaPointerConstraint can be used to implement any kind of pointer
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* constraint as requested by a client, such as cursor lock.
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*
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* Examples of pointer constraints are "pointer confinement" and "pointer
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* locking" (as defined in the wayland pointer constraint protocol extension),
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* which restrict movement in relation to a given client.
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*/
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#include "config.h"
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#include "backends/meta-pointer-constraint.h"
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#include <glib-object.h>
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G_DEFINE_TYPE (MetaPointerConstraint, meta_pointer_constraint, G_TYPE_OBJECT);
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static void
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meta_pointer_constraint_init (MetaPointerConstraint *constraint)
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{
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}
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static void
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meta_pointer_constraint_class_init (MetaPointerConstraintClass *klass)
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{
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}
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/**
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* meta_pointer_constraint_constrain:
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* @constraint: a #MetaPointerConstraint.
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* @device; the device of the pointer.
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* @time: the timestamp (in ms) of the event.
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* @prev_x: X-coordinate of the previous pointer position.
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* @prev_y: Y-coordinate of the previous pointer position.
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* @x: The modifiable X-coordinate to which the pointer would like to go to.
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* @y: The modifiable Y-coordinate to which the pointer would like to go to.
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*
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* Constrains the pointer movement from point (@prev_x, @prev_y) to (@x, @y),
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* if needed.
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*/
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void
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meta_pointer_constraint_constrain (MetaPointerConstraint *constraint,
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ClutterInputDevice *device,
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guint32 time,
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float prev_x,
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float prev_y,
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float *x,
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float *y)
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{
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META_POINTER_CONSTRAINT_GET_CLASS (constraint)->constrain (constraint,
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device,
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time,
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prev_x, prev_y,
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x, y);
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}
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