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/* gtkconstraint.h: Constraint between two widgets
* Copyright 2019 GNOME Foundation
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
* Author: Emmanuele Bassi
*/
#pragma once
#include <gtk/gtktypes.h>
#include <gtk/gtkenums.h>
G_BEGIN_DECLS
typedef struct _GtkConstraintTarget GtkConstraintTarget;
#define GTK_TYPE_CONSTRAINT_TARGET (gtk_constraint_target_get_type ())
/**
* GtkConstraintTarget:
*
* The GtkConstraintTarget interface is implemented by objects that
* can be used as source or target in #GtkConstraints. Besides
* #GtkWidget, it is also implemented by #GtkConstraintGuide.
*/
GDK_AVAILABLE_IN_ALL
G_DECLARE_INTERFACE (GtkConstraintTarget, gtk_constraint_target, GTK, CONSTRAINT_TARGET, GObject)
#define GTK_TYPE_CONSTRAINT (gtk_constraint_get_type ())
/**
* GtkConstraint:
*
* An object describing the relation between two widget attributes.
*
* All relations are in the form:
*
* |[<!-- language=plain -->
* target.attr_name = source.attr_name × multiplier + constant
* ]|
*
* A #GtkConstraint is immutable once it's created.
*/
GDK_AVAILABLE_IN_ALL
G_DECLARE_FINAL_TYPE (GtkConstraint, gtk_constraint, GTK, CONSTRAINT, GObject)
GDK_AVAILABLE_IN_ALL
GtkConstraint * gtk_constraint_new (gpointer target,
GtkConstraintAttribute target_attribute,
GtkConstraintRelation relation,
gpointer source,
GtkConstraintAttribute source_attribute,
double multiplier,
double constant,
int strength);
GDK_AVAILABLE_IN_ALL
GtkConstraint * gtk_constraint_new_constant (gpointer target,
GtkConstraintAttribute target_attribute,
GtkConstraintRelation relation,
double constant,
int strength);
GDK_AVAILABLE_IN_ALL
GtkConstraintTarget * gtk_constraint_get_target (GtkConstraint *constraint);
GDK_AVAILABLE_IN_ALL
GtkConstraintAttribute gtk_constraint_get_target_attribute (GtkConstraint *constraint);
GDK_AVAILABLE_IN_ALL
GtkConstraintTarget * gtk_constraint_get_source (GtkConstraint *constraint);
GDK_AVAILABLE_IN_ALL
GtkConstraintAttribute gtk_constraint_get_source_attribute (GtkConstraint *constraint);
GDK_AVAILABLE_IN_ALL
GtkConstraintRelation gtk_constraint_get_relation (GtkConstraint *constraint);
GDK_AVAILABLE_IN_ALL
double gtk_constraint_get_multiplier (GtkConstraint *constraint);
GDK_AVAILABLE_IN_ALL
double gtk_constraint_get_constant (GtkConstraint *constraint);
GDK_AVAILABLE_IN_ALL
int gtk_constraint_get_strength (GtkConstraint *constraint);
GDK_AVAILABLE_IN_ALL
gboolean gtk_constraint_is_required (GtkConstraint *constraint);
GDK_AVAILABLE_IN_ALL
gboolean gtk_constraint_is_attached (GtkConstraint *constraint);
GDK_AVAILABLE_IN_ALL
gboolean gtk_constraint_is_constant (GtkConstraint *constraint);
G_END_DECLS
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