forked from AuroraMiddleware/gtk
4dd1de4129
Instead of playing games with mapping negative symbolic values to
positive ones, let's use the appropriate constants everywhere. This
allows us to use:
GTK_CONSTRAINT_STRENGTH_WEAK * 2
Or
GTK_CONSTRAINT_STRENGTH_STRONG + 1
In code using the public API.
We also store the strength values as integers, so we can compare them
properly, and only turn them into doubles when they are inserted into
the solver, just like every other variable.
61 lines
1.7 KiB
C
61 lines
1.7 KiB
C
/* gtkconstraintprivate.h: Constraint between two widgets
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* Copyright 2019 GNOME Foundation
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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 "gtkconstraint.h"
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#include "gtkconstrainttypesprivate.h"
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G_BEGIN_DECLS
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struct _GtkConstraint
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{
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GObject parent_instance;
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GtkConstraintAttribute target_attribute;
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GtkConstraintAttribute source_attribute;
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GtkConstraintTarget *target;
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GtkConstraintTarget *source;
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GtkConstraintRelation relation;
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double multiplier;
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double constant;
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int strength;
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/* A reference to the real constraint inside the
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* GtkConstraintSolver, so we can remove it when
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* finalizing the GtkConstraint instance
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*/
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GtkConstraintRef *constraint_ref;
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GtkConstraintSolver *solver;
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guint active : 1;
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};
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void gtk_constraint_attach (GtkConstraint *constraint,
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GtkConstraintSolver *solver,
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GtkConstraintRef *ref);
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void gtk_constraint_detach (GtkConstraint *constraint);
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G_END_DECLS
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