forked from AuroraMiddleware/gtk
6b308cd71e
GtkConstraintSolver is an implementation of the Cassowary constraint solving algorithm: http://constraints.cs.washington.edu/cassowary/ The Cassowary method allows to incrementally solve a tableau of linear equations, in the form of: x = y × coefficient + constant with different weights, or strengths, applied to each one. These equations can be used to describe constraints applied to a layout of UI elements, which allows layout managers using the Cassowary method to quickly, and efficiently, lay out widgets in complex relations between themselves and their parent container.
51 lines
1.7 KiB
C
51 lines
1.7 KiB
C
/* gtkconstrainttypesprivate.h: Private types for the constraint solver
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* Copyright 2019 GNOME Foundation
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*
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* SPDX-License-Identifier: LGPL-2.1-or-later
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but 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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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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* Author: Emmanuele Bassi
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*/
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#pragma once
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#include <gtk/gtktypes.h>
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#include <gtk/gtkenums.h>
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G_BEGIN_DECLS
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typedef struct _GtkConstraintVariable GtkConstraintVariable;
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typedef struct _GtkConstraintExpression GtkConstraintExpression;
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typedef struct _GtkConstraintExpressionBuilder GtkConstraintExpressionBuilder;
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/*< private >
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* GtkConstraintRef:
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*
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* A reference to a constraint stored inside the solver; while #GtkConstraint
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* represent the public API, a #GtkConstraintRef represents data stored inside
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* the solver. A #GtkConstraintRef is completely opaque, and should only be
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* used to remove a constraint from the solver.
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*/
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typedef struct _GtkConstraintRef GtkConstraintRef;
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/*< private >
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* GtkConstraintSolver:
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*
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* A simplex solver using the Cassowary constraint solving algorithm.
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*/
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typedef struct _GtkConstraintSolver GtkConstraintSolver;
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G_END_DECLS
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