forked from AuroraMiddleware/gtk
Add constraint solver
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.
This commit is contained in:
Emmanuele Bassi
parent
3b6ee32f83
commit
6b308cd71e
1842
gtk/gtkconstraintexpression.c
Normal file
1842
gtk/gtkconstraintexpression.c
Normal file
File diff suppressed because it is too large
Load Diff
276
gtk/gtkconstraintexpressionprivate.h
Normal file
276
gtk/gtkconstraintexpressionprivate.h
Normal file
@ -0,0 +1,276 @@
|
||||
/* gtkconstraintequationprivate.h: Constraint expressions and variables
|
||||
* Copyright 2019 GNOME Foundation
|
||||
*
|
||||
* SPDX-License-Identifier: LGPL-2.1-or-later
|
||||
*
|
||||
* 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 "gtkconstrainttypesprivate.h"
|
||||
|
||||
G_BEGIN_DECLS
|
||||
|
||||
GtkConstraintVariable *
|
||||
gtk_constraint_variable_new (const char *name);
|
||||
|
||||
GtkConstraintVariable *
|
||||
gtk_constraint_variable_new_dummy (const char *name);
|
||||
|
||||
GtkConstraintVariable *
|
||||
gtk_constraint_variable_new_objective (const char *name);
|
||||
|
||||
GtkConstraintVariable *
|
||||
gtk_constraint_variable_new_slack (const char *name);
|
||||
|
||||
GtkConstraintVariable *
|
||||
gtk_constraint_variable_ref (GtkConstraintVariable *variable);
|
||||
|
||||
void
|
||||
gtk_constraint_variable_unref (GtkConstraintVariable *variable);
|
||||
|
||||
void
|
||||
gtk_constraint_variable_set_value (GtkConstraintVariable *variable,
|
||||
double value);
|
||||
|
||||
double
|
||||
gtk_constraint_variable_get_value (const GtkConstraintVariable *variable);
|
||||
|
||||
void
|
||||
gtk_constraint_variable_set_prefix (GtkConstraintVariable *variable,
|
||||
const char *prefix);
|
||||
|
||||
char *
|
||||
gtk_constraint_variable_to_string (const GtkConstraintVariable *variable);
|
||||
|
||||
gboolean
|
||||
gtk_constraint_variable_is_external (const GtkConstraintVariable *variable);
|
||||
|
||||
gboolean
|
||||
gtk_constraint_variable_is_pivotable (const GtkConstraintVariable *variable);
|
||||
|
||||
gboolean
|
||||
gtk_constraint_variable_is_restricted (const GtkConstraintVariable *variable);
|
||||
|
||||
gboolean
|
||||
gtk_constraint_variable_is_dummy (const GtkConstraintVariable *variable);
|
||||
|
||||
typedef struct {
|
||||
GtkConstraintVariable *first;
|
||||
GtkConstraintVariable *second;
|
||||
} GtkConstraintVariablePair;
|
||||
|
||||
GtkConstraintVariablePair *
|
||||
gtk_constraint_variable_pair_new (GtkConstraintVariable *first,
|
||||
GtkConstraintVariable *second);
|
||||
|
||||
void
|
||||
gtk_constraint_variable_pair_free (GtkConstraintVariablePair *pair);
|
||||
|
||||
typedef struct _GtkConstraintVariableSet GtkConstraintVariableSet;
|
||||
|
||||
GtkConstraintVariableSet *
|
||||
gtk_constraint_variable_set_new (void);
|
||||
|
||||
void
|
||||
gtk_constraint_variable_set_free (GtkConstraintVariableSet *set);
|
||||
|
||||
gboolean
|
||||
gtk_constraint_variable_set_add (GtkConstraintVariableSet *set,
|
||||
GtkConstraintVariable *variable);
|
||||
|
||||
gboolean
|
||||
gtk_constraint_variable_set_remove (GtkConstraintVariableSet *set,
|
||||
GtkConstraintVariable *variable);
|
||||
|
||||
int
|
||||
gtk_constraint_variable_set_size (GtkConstraintVariableSet *set);
|
||||
|
||||
typedef struct {
|
||||
/*< private >*/
|
||||
gpointer dummy1;
|
||||
gpointer dummy2;
|
||||
gint64 dummy3;
|
||||
} GtkConstraintVariableSetIter;
|
||||
|
||||
void
|
||||
gtk_constraint_variable_set_iter_init (GtkConstraintVariableSetIter *iter,
|
||||
GtkConstraintVariableSet *set);
|
||||
|
||||
gboolean
|
||||
gtk_constraint_variable_set_iter_next (GtkConstraintVariableSetIter *iter,
|
||||
GtkConstraintVariable **variable_p);
|
||||
|
||||
GtkConstraintExpression *
|
||||
gtk_constraint_expression_new (double constant);
|
||||
|
||||
GtkConstraintExpression *
|
||||
gtk_constraint_expression_new_from_variable (GtkConstraintVariable *variable);
|
||||
|
||||
GtkConstraintExpression *
|
||||
gtk_constraint_expression_ref (GtkConstraintExpression *expression);
|
||||
|
||||
void
|
||||
gtk_constraint_expression_unref (GtkConstraintExpression *expression);
|
||||
|
||||
GtkConstraintExpression *
|
||||
gtk_constraint_expression_clone (GtkConstraintExpression *expression);
|
||||
|
||||
void
|
||||
gtk_constraint_expression_set_constant (GtkConstraintExpression *expression,
|
||||
double constant);
|
||||
double
|
||||
gtk_constraint_expression_get_constant (const GtkConstraintExpression *expression);
|
||||
|
||||
gboolean
|
||||
gtk_constraint_expression_is_constant (const GtkConstraintExpression *expression);
|
||||
|
||||
void
|
||||
gtk_constraint_expression_add_expression (GtkConstraintExpression *a_expr,
|
||||
GtkConstraintExpression *b_expr,
|
||||
double n,
|
||||
GtkConstraintVariable *subject,
|
||||
GtkConstraintSolver *solver);
|
||||
|
||||
void
|
||||
gtk_constraint_expression_add_variable (GtkConstraintExpression *expression,
|
||||
GtkConstraintVariable *variable,
|
||||
double coefficient,
|
||||
GtkConstraintVariable *subject,
|
||||
GtkConstraintSolver *solver);
|
||||
|
||||
void
|
||||
gtk_constraint_expression_remove_variable (GtkConstraintExpression *expression,
|
||||
GtkConstraintVariable *variable);
|
||||
|
||||
void
|
||||
gtk_constraint_expression_set_variable (GtkConstraintExpression *expression,
|
||||
GtkConstraintVariable *variable,
|
||||
double coefficient);
|
||||
|
||||
double
|
||||
gtk_constraint_expression_get_coefficient (GtkConstraintExpression *expression,
|
||||
GtkConstraintVariable *variable);
|
||||
|
||||
char *
|
||||
gtk_constraint_expression_to_string (const GtkConstraintExpression *expression);
|
||||
|
||||
double
|
||||
gtk_constraint_expression_new_subject (GtkConstraintExpression *expression,
|
||||
GtkConstraintVariable *subject);
|
||||
|
||||
void
|
||||
gtk_constraint_expression_change_subject (GtkConstraintExpression *expression,
|
||||
GtkConstraintVariable *old_subject,
|
||||
GtkConstraintVariable *new_subject);
|
||||
|
||||
void
|
||||
gtk_constraint_expression_substitute_out (GtkConstraintExpression *expression,
|
||||
GtkConstraintVariable *out_var,
|
||||
GtkConstraintExpression *expr,
|
||||
GtkConstraintVariable *subject,
|
||||
GtkConstraintSolver *solver);
|
||||
|
||||
GtkConstraintVariable *
|
||||
gtk_constraint_expression_get_pivotable_variable (GtkConstraintExpression *expression);
|
||||
|
||||
GtkConstraintExpression *
|
||||
gtk_constraint_expression_plus_constant (GtkConstraintExpression *expression,
|
||||
double constant);
|
||||
|
||||
GtkConstraintExpression *
|
||||
gtk_constraint_expression_minus_constant (GtkConstraintExpression *expression,
|
||||
double constant);
|
||||
|
||||
GtkConstraintExpression *
|
||||
gtk_constraint_expression_plus_variable (GtkConstraintExpression *expression,
|
||||
GtkConstraintVariable *variable);
|
||||
|
||||
GtkConstraintExpression *
|
||||
gtk_constraint_expression_minus_variable (GtkConstraintExpression *expression,
|
||||
GtkConstraintVariable *variable);
|
||||
|
||||
GtkConstraintExpression *
|
||||
gtk_constraint_expression_multiply_by (GtkConstraintExpression *expression,
|
||||
double factor);
|
||||
|
||||
GtkConstraintExpression *
|
||||
gtk_constraint_expression_divide_by (GtkConstraintExpression *expression,
|
||||
double factor);
|
||||
|
||||
struct _GtkConstraintExpressionBuilder
|
||||
{
|
||||
/*< private >*/
|
||||
gpointer dummy1;
|
||||
gpointer dummy2;
|
||||
int dummy3;
|
||||
};
|
||||
|
||||
void
|
||||
gtk_constraint_expression_builder_init (GtkConstraintExpressionBuilder *builder,
|
||||
GtkConstraintSolver *solver);
|
||||
|
||||
void
|
||||
gtk_constraint_expression_builder_term (GtkConstraintExpressionBuilder *builder,
|
||||
GtkConstraintVariable *term);
|
||||
|
||||
void
|
||||
gtk_constraint_expression_builder_plus (GtkConstraintExpressionBuilder *builder);
|
||||
|
||||
void
|
||||
gtk_constraint_expression_builder_minus (GtkConstraintExpressionBuilder *builder);
|
||||
|
||||
void
|
||||
gtk_constraint_expression_builder_divide_by (GtkConstraintExpressionBuilder *builder);
|
||||
|
||||
void
|
||||
gtk_constraint_expression_builder_multiply_by (GtkConstraintExpressionBuilder *builder);
|
||||
|
||||
void
|
||||
gtk_constraint_expression_builder_constant (GtkConstraintExpressionBuilder *builder,
|
||||
double value);
|
||||
|
||||
GtkConstraintExpression *
|
||||
gtk_constraint_expression_builder_finish (GtkConstraintExpressionBuilder *builder) G_GNUC_WARN_UNUSED_RESULT;
|
||||
|
||||
/*< private >
|
||||
* GtkConstraintExpressionIter:
|
||||
*
|
||||
* An iterator object for terms inside a #GtkConstraintExpression.
|
||||
*/
|
||||
typedef struct {
|
||||
/*< private >*/
|
||||
gpointer dummy1;
|
||||
gpointer dummy2;
|
||||
gint64 dummy3;
|
||||
} GtkConstraintExpressionIter;
|
||||
|
||||
void
|
||||
gtk_constraint_expression_iter_init (GtkConstraintExpressionIter *iter,
|
||||
GtkConstraintExpression *equation);
|
||||
|
||||
gboolean
|
||||
gtk_constraint_expression_iter_next (GtkConstraintExpressionIter *iter,
|
||||
GtkConstraintVariable **variable,
|
||||
double *coefficient);
|
||||
|
||||
gboolean
|
||||
gtk_constraint_expression_iter_prev (GtkConstraintExpressionIter *iter,
|
||||
GtkConstraintVariable **variable,
|
||||
double *coefficient);
|
||||
|
||||
G_END_DECLS
|
||||
2234
gtk/gtkconstraintsolver.c
Normal file
2234
gtk/gtkconstraintsolver.c
Normal file
File diff suppressed because it is too large
Load Diff
114
gtk/gtkconstraintsolverprivate.h
Normal file
114
gtk/gtkconstraintsolverprivate.h
Normal file
@ -0,0 +1,114 @@
|
||||
/* gtkconstraintsolverprivate.h: Constraint solver based on the Cassowary method
|
||||
* Copyright 2019 GNOME Foundation
|
||||
*
|
||||
* SPDX-License-Identifier: LGPL-2.1-or-later
|
||||
*
|
||||
* 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 "gtkconstrainttypesprivate.h"
|
||||
|
||||
G_BEGIN_DECLS
|
||||
|
||||
#define GTK_TYPE_CONSTRAINT_SOLVER (gtk_constraint_solver_get_type())
|
||||
|
||||
G_DECLARE_FINAL_TYPE (GtkConstraintSolver, gtk_constraint_solver, GTK, CONSTRAINT_SOLVER, GObject)
|
||||
|
||||
GtkConstraintSolver *
|
||||
gtk_constraint_solver_new (void);
|
||||
|
||||
void
|
||||
gtk_constraint_solver_freeze (GtkConstraintSolver *solver);
|
||||
|
||||
void
|
||||
gtk_constraint_solver_thaw (GtkConstraintSolver *solver);
|
||||
|
||||
void
|
||||
gtk_constraint_solver_resolve (GtkConstraintSolver *solver);
|
||||
|
||||
GtkConstraintVariable *
|
||||
gtk_constraint_solver_create_variable (GtkConstraintSolver *solver,
|
||||
const char *prefix,
|
||||
const char *name,
|
||||
double value);
|
||||
|
||||
GtkConstraintRef *
|
||||
gtk_constraint_solver_add_constraint (GtkConstraintSolver *solver,
|
||||
GtkConstraintVariable *variable,
|
||||
GtkConstraintRelation relation,
|
||||
GtkConstraintExpression *expression,
|
||||
double strength);
|
||||
|
||||
void
|
||||
gtk_constraint_solver_remove_constraint (GtkConstraintSolver *solver,
|
||||
GtkConstraintRef *reference);
|
||||
|
||||
GtkConstraintRef *
|
||||
gtk_constraint_solver_add_stay_variable (GtkConstraintSolver *solver,
|
||||
GtkConstraintVariable *variable,
|
||||
double strength);
|
||||
|
||||
void
|
||||
gtk_constraint_solver_remove_stay_variable (GtkConstraintSolver *solver,
|
||||
GtkConstraintVariable *variable);
|
||||
|
||||
gboolean
|
||||
gtk_constraint_solver_has_stay_variable (GtkConstraintSolver *solver,
|
||||
GtkConstraintVariable *variable);
|
||||
|
||||
GtkConstraintRef *
|
||||
gtk_constraint_solver_add_edit_variable (GtkConstraintSolver *solver,
|
||||
GtkConstraintVariable *variable,
|
||||
double strength);
|
||||
|
||||
void
|
||||
gtk_constraint_solver_remove_edit_variable (GtkConstraintSolver *solver,
|
||||
GtkConstraintVariable *variable);
|
||||
|
||||
gboolean
|
||||
gtk_constraint_solver_has_edit_variable (GtkConstraintSolver *solver,
|
||||
GtkConstraintVariable *variable);
|
||||
|
||||
void
|
||||
gtk_constraint_solver_suggest_value (GtkConstraintSolver *solver,
|
||||
GtkConstraintVariable *variable,
|
||||
double value);
|
||||
|
||||
void
|
||||
gtk_constraint_solver_begin_edit (GtkConstraintSolver *solver);
|
||||
|
||||
void
|
||||
gtk_constraint_solver_end_edit (GtkConstraintSolver *solver);
|
||||
|
||||
void
|
||||
gtk_constraint_solver_note_added_variable (GtkConstraintSolver *self,
|
||||
GtkConstraintVariable *variable,
|
||||
GtkConstraintVariable *subject);
|
||||
|
||||
void
|
||||
gtk_constraint_solver_note_removed_variable (GtkConstraintSolver *self,
|
||||
GtkConstraintVariable *variable,
|
||||
GtkConstraintVariable *subject);
|
||||
|
||||
void
|
||||
gtk_constraint_solver_clear (GtkConstraintSolver *solver);
|
||||
|
||||
char *
|
||||
gtk_constraint_solver_to_string (GtkConstraintSolver *solver);
|
||||
|
||||
G_END_DECLS
|
||||
50
gtk/gtkconstrainttypesprivate.h
Normal file
50
gtk/gtkconstrainttypesprivate.h
Normal file
@ -0,0 +1,50 @@
|
||||
/* gtkconstrainttypesprivate.h: Private types for the constraint solver
|
||||
* Copyright 2019 GNOME Foundation
|
||||
*
|
||||
* SPDX-License-Identifier: LGPL-2.1-or-later
|
||||
*
|
||||
* 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 _GtkConstraintVariable GtkConstraintVariable;
|
||||
typedef struct _GtkConstraintExpression GtkConstraintExpression;
|
||||
typedef struct _GtkConstraintExpressionBuilder GtkConstraintExpressionBuilder;
|
||||
|
||||
/*< private >
|
||||
* GtkConstraintRef:
|
||||
*
|
||||
* A reference to a constraint stored inside the solver; while #GtkConstraint
|
||||
* represent the public API, a #GtkConstraintRef represents data stored inside
|
||||
* the solver. A #GtkConstraintRef is completely opaque, and should only be
|
||||
* used to remove a constraint from the solver.
|
||||
*/
|
||||
typedef struct _GtkConstraintRef GtkConstraintRef;
|
||||
|
||||
/*< private >
|
||||
* GtkConstraintSolver:
|
||||
*
|
||||
* A simplex solver using the Cassowary constraint solving algorithm.
|
||||
*/
|
||||
typedef struct _GtkConstraintSolver GtkConstraintSolver;
|
||||
|
||||
G_END_DECLS
|
||||
@ -1053,4 +1053,18 @@ typedef enum {
|
||||
GTK_PICK_NON_TARGETABLE = 1 << 1
|
||||
} GtkPickFlags;
|
||||
|
||||
/**
|
||||
* GtkConstraintRelation:
|
||||
* @GTK_CONSTRAINT_RELATION_EQ: Equal
|
||||
* @GTK_CONSTRAINT_RELATION_LE: Less than, or equal
|
||||
* @GTK_CONSTRAINT_RELATION_GE: Greater than, or equal
|
||||
*
|
||||
* The relation between two terms of a constraint.
|
||||
*/
|
||||
typedef enum {
|
||||
GTK_CONSTRAINT_RELATION_LE = -1,
|
||||
GTK_CONSTRAINT_RELATION_EQ = 0,
|
||||
GTK_CONSTRAINT_RELATION_GE = 1
|
||||
} GtkConstraintRelation;
|
||||
|
||||
#endif /* __GTK_ENUMS_H__ */
|
||||
|
||||
@ -37,6 +37,8 @@ gtk_private_sources = files([
|
||||
'gtkcolorpickershell.c',
|
||||
'gtkcolorscale.c',
|
||||
'gtkcolorswatch.c',
|
||||
'gtkconstraintexpression.c',
|
||||
'gtkconstraintsolver.c',
|
||||
'gtkcssanimatedstyle.c',
|
||||
'gtkcssanimation.c',
|
||||
'gtkcssarrayvalue.c',
|
||||
|
||||
368
testsuite/gtk/constraint-solver.c
Normal file
368
testsuite/gtk/constraint-solver.c
Normal file
@ -0,0 +1,368 @@
|
||||
#include <locale.h>
|
||||
|
||||
#include "../../gtk/gtkconstrainttypesprivate.h"
|
||||
#include "../../gtk/gtkconstraintsolverprivate.h"
|
||||
#include "../../gtk/gtkconstraintexpressionprivate.h"
|
||||
|
||||
static void
|
||||
constraint_solver_simple (void)
|
||||
{
|
||||
GtkConstraintSolver *solver = gtk_constraint_solver_new ();
|
||||
|
||||
GtkConstraintVariable *x = gtk_constraint_solver_create_variable (solver, NULL, "x", 167.0);
|
||||
GtkConstraintVariable *y = gtk_constraint_solver_create_variable (solver, NULL, "y", 2.0);
|
||||
|
||||
GtkConstraintExpression *e = gtk_constraint_expression_new_from_variable (y);
|
||||
|
||||
gtk_constraint_solver_add_constraint (solver,
|
||||
x, GTK_CONSTRAINT_RELATION_EQ, e,
|
||||
GTK_CONSTRAINT_WEIGHT_REQUIRED);
|
||||
|
||||
double x_value = gtk_constraint_variable_get_value (x);
|
||||
double y_value = gtk_constraint_variable_get_value (y);
|
||||
|
||||
g_assert_cmpfloat_with_epsilon (x_value, y_value, 0.001);
|
||||
g_assert_cmpfloat_with_epsilon (x_value, 0.0, 0.001);
|
||||
g_assert_cmpfloat_with_epsilon (y_value, 0.0, 0.001);
|
||||
|
||||
gtk_constraint_variable_unref (y);
|
||||
gtk_constraint_variable_unref (x);
|
||||
|
||||
g_object_unref (solver);
|
||||
}
|
||||
|
||||
static void
|
||||
constraint_solver_stay (void)
|
||||
{
|
||||
GtkConstraintSolver *solver = gtk_constraint_solver_new ();
|
||||
|
||||
GtkConstraintVariable *x = gtk_constraint_solver_create_variable (solver, NULL, "x", 5.0);
|
||||
GtkConstraintVariable *y = gtk_constraint_solver_create_variable (solver, NULL, "y", 10.0);
|
||||
|
||||
gtk_constraint_solver_add_stay_variable (solver, x, GTK_CONSTRAINT_WEIGHT_WEAK);
|
||||
gtk_constraint_solver_add_stay_variable (solver, y, GTK_CONSTRAINT_WEIGHT_WEAK);
|
||||
|
||||
double x_value = gtk_constraint_variable_get_value (x);
|
||||
double y_value = gtk_constraint_variable_get_value (y);
|
||||
|
||||
g_assert_cmpfloat_with_epsilon (x_value, 5.0, 0.001);
|
||||
g_assert_cmpfloat_with_epsilon (y_value, 10.0, 0.001);
|
||||
|
||||
gtk_constraint_variable_unref (x);
|
||||
gtk_constraint_variable_unref (y);
|
||||
|
||||
g_object_unref (solver);
|
||||
}
|
||||
|
||||
static void
|
||||
constraint_solver_variable_geq_constant (void)
|
||||
{
|
||||
GtkConstraintSolver *solver = gtk_constraint_solver_new ();
|
||||
|
||||
GtkConstraintVariable *x = gtk_constraint_solver_create_variable (solver, NULL, "x", 10.0);
|
||||
GtkConstraintExpression *e = gtk_constraint_expression_new (100.0);
|
||||
|
||||
gtk_constraint_solver_add_constraint (solver,
|
||||
x, GTK_CONSTRAINT_RELATION_GE, e,
|
||||
GTK_CONSTRAINT_WEIGHT_REQUIRED);
|
||||
|
||||
double x_value = gtk_constraint_variable_get_value (x);
|
||||
|
||||
g_assert_cmpfloat (x_value, >=, 100.0);
|
||||
|
||||
gtk_constraint_variable_unref (x);
|
||||
|
||||
g_object_unref (solver);
|
||||
}
|
||||
|
||||
static void
|
||||
constraint_solver_variable_leq_constant (void)
|
||||
{
|
||||
GtkConstraintSolver *solver = gtk_constraint_solver_new ();
|
||||
|
||||
GtkConstraintVariable *x = gtk_constraint_solver_create_variable (solver, NULL, "x", 100.0);
|
||||
GtkConstraintExpression *e = gtk_constraint_expression_new (10.0);
|
||||
|
||||
gtk_constraint_solver_add_constraint (solver,
|
||||
x, GTK_CONSTRAINT_RELATION_LE, e,
|
||||
GTK_CONSTRAINT_WEIGHT_REQUIRED);
|
||||
|
||||
double x_value = gtk_constraint_variable_get_value (x);
|
||||
|
||||
g_assert_cmpfloat (x_value, <=, 10.0);
|
||||
|
||||
gtk_constraint_variable_unref (x);
|
||||
|
||||
g_object_unref (solver);
|
||||
}
|
||||
|
||||
static void
|
||||
constraint_solver_variable_eq_constant (void)
|
||||
{
|
||||
GtkConstraintSolver *solver = gtk_constraint_solver_new ();
|
||||
|
||||
GtkConstraintVariable *x = gtk_constraint_solver_create_variable (solver, NULL, "x", 10.0);
|
||||
GtkConstraintExpression *e = gtk_constraint_expression_new (100.0);
|
||||
|
||||
gtk_constraint_solver_add_constraint (solver,
|
||||
x, GTK_CONSTRAINT_RELATION_EQ, e,
|
||||
GTK_CONSTRAINT_WEIGHT_REQUIRED);
|
||||
|
||||
double x_value = gtk_constraint_variable_get_value (x);
|
||||
|
||||
g_assert_cmpfloat_with_epsilon (x_value, 100.0, 0.001);
|
||||
|
||||
gtk_constraint_variable_unref (x);
|
||||
|
||||
g_object_unref (solver);
|
||||
}
|
||||
|
||||
static void
|
||||
constraint_solver_eq_with_stay (void)
|
||||
{
|
||||
GtkConstraintSolver *solver = gtk_constraint_solver_new ();
|
||||
|
||||
GtkConstraintVariable *x = gtk_constraint_solver_create_variable (solver, NULL, "x", 10.0);
|
||||
GtkConstraintVariable *width = gtk_constraint_solver_create_variable (solver, NULL, "width", 10.0);
|
||||
GtkConstraintVariable *right_min = gtk_constraint_solver_create_variable (solver, NULL, "rightMin", 100.0);
|
||||
|
||||
GtkConstraintExpressionBuilder builder;
|
||||
gtk_constraint_expression_builder_init (&builder, solver);
|
||||
gtk_constraint_expression_builder_term (&builder, x);
|
||||
gtk_constraint_expression_builder_plus (&builder);
|
||||
gtk_constraint_expression_builder_term (&builder, width);
|
||||
GtkConstraintExpression *right = gtk_constraint_expression_builder_finish (&builder);
|
||||
|
||||
gtk_constraint_solver_add_stay_variable (solver, width, GTK_CONSTRAINT_WEIGHT_WEAK);
|
||||
gtk_constraint_solver_add_stay_variable (solver, right_min, GTK_CONSTRAINT_WEIGHT_WEAK);
|
||||
gtk_constraint_solver_add_constraint (solver,
|
||||
right_min, GTK_CONSTRAINT_RELATION_EQ, right,
|
||||
GTK_CONSTRAINT_WEIGHT_REQUIRED);
|
||||
|
||||
double x_value = gtk_constraint_variable_get_value (x);
|
||||
double width_value = gtk_constraint_variable_get_value (width);
|
||||
|
||||
g_assert_cmpfloat_with_epsilon (x_value, 90.0, 0.001);
|
||||
g_assert_cmpfloat_with_epsilon (width_value, 10.0, 0.001);
|
||||
|
||||
gtk_constraint_variable_unref (right_min);
|
||||
gtk_constraint_variable_unref (width);
|
||||
gtk_constraint_variable_unref (x);
|
||||
|
||||
g_object_unref (solver);
|
||||
}
|
||||
|
||||
static void
|
||||
constraint_solver_cassowary (void)
|
||||
{
|
||||
GtkConstraintSolver *solver = gtk_constraint_solver_new ();
|
||||
|
||||
GtkConstraintVariable *x = gtk_constraint_solver_create_variable (solver, NULL, "x", 0.0);
|
||||
GtkConstraintVariable *y = gtk_constraint_solver_create_variable (solver, NULL, "y", 0.0);
|
||||
|
||||
GtkConstraintExpression *e;
|
||||
|
||||
e = gtk_constraint_expression_new_from_variable (y);
|
||||
gtk_constraint_solver_add_constraint (solver,
|
||||
x, GTK_CONSTRAINT_RELATION_LE, e,
|
||||
GTK_CONSTRAINT_WEIGHT_REQUIRED);
|
||||
|
||||
e = gtk_constraint_expression_plus_constant (gtk_constraint_expression_new_from_variable (x), 3.0);
|
||||
gtk_constraint_solver_add_constraint (solver,
|
||||
y, GTK_CONSTRAINT_RELATION_EQ, e,
|
||||
GTK_CONSTRAINT_WEIGHT_REQUIRED);
|
||||
|
||||
e = gtk_constraint_expression_new (10.0);
|
||||
gtk_constraint_solver_add_constraint (solver,
|
||||
x, GTK_CONSTRAINT_RELATION_EQ, e,
|
||||
GTK_CONSTRAINT_WEIGHT_WEAK);
|
||||
|
||||
e = gtk_constraint_expression_new (10.0);
|
||||
gtk_constraint_solver_add_constraint (solver,
|
||||
y, GTK_CONSTRAINT_RELATION_EQ, e,
|
||||
GTK_CONSTRAINT_WEIGHT_WEAK);
|
||||
|
||||
double x_val = gtk_constraint_variable_get_value (x);
|
||||
double y_val = gtk_constraint_variable_get_value (y);
|
||||
|
||||
g_test_message ("x = %g, y = %g", x_val, y_val);
|
||||
|
||||
/* The system is unstable and has two possible solutions we need to test */
|
||||
g_assert_true ((G_APPROX_VALUE (x_val, 10.0, 1e-8) &&
|
||||
G_APPROX_VALUE (y_val, 13.0, 1e-8)) ||
|
||||
(G_APPROX_VALUE (x_val, 7.0, 1e-8) &&
|
||||
G_APPROX_VALUE (y_val, 10.0, 1e-8)));
|
||||
|
||||
gtk_constraint_variable_unref (x);
|
||||
gtk_constraint_variable_unref (y);
|
||||
|
||||
g_object_unref (solver);
|
||||
}
|
||||
|
||||
static void
|
||||
constraint_solver_edit_var_required (void)
|
||||
{
|
||||
GtkConstraintSolver *solver = gtk_constraint_solver_new ();
|
||||
|
||||
GtkConstraintVariable *a = gtk_constraint_solver_create_variable (solver, NULL, "a", 0.0);
|
||||
gtk_constraint_solver_add_stay_variable (solver, a, GTK_CONSTRAINT_WEIGHT_STRONG);
|
||||
|
||||
g_assert_cmpfloat_with_epsilon (gtk_constraint_variable_get_value (a), 0.0, 0.001);
|
||||
|
||||
gtk_constraint_solver_add_edit_variable (solver, a, GTK_CONSTRAINT_WEIGHT_REQUIRED);
|
||||
gtk_constraint_solver_begin_edit (solver);
|
||||
gtk_constraint_solver_suggest_value (solver, a, 2.0);
|
||||
gtk_constraint_solver_resolve (solver);
|
||||
|
||||
g_assert_cmpfloat_with_epsilon (gtk_constraint_variable_get_value (a), 2.0, 0.001);
|
||||
|
||||
gtk_constraint_solver_suggest_value (solver, a, 10.0);
|
||||
gtk_constraint_solver_resolve (solver);
|
||||
|
||||
g_assert_cmpfloat_with_epsilon (gtk_constraint_variable_get_value (a), 10.0, 0.001);
|
||||
|
||||
gtk_constraint_solver_end_edit (solver);
|
||||
|
||||
gtk_constraint_variable_unref (a);
|
||||
|
||||
g_object_unref (solver);
|
||||
}
|
||||
|
||||
static void
|
||||
constraint_solver_edit_var_suggest (void)
|
||||
{
|
||||
GtkConstraintSolver *solver = gtk_constraint_solver_new ();
|
||||
|
||||
GtkConstraintVariable *a = gtk_constraint_solver_create_variable (solver, NULL, "a", 0.0);
|
||||
GtkConstraintVariable *b = gtk_constraint_solver_create_variable (solver, NULL, "b", 0.0);
|
||||
|
||||
gtk_constraint_solver_add_stay_variable (solver, a, GTK_CONSTRAINT_WEIGHT_STRONG);
|
||||
|
||||
GtkConstraintExpression *e = gtk_constraint_expression_new_from_variable (b);
|
||||
gtk_constraint_solver_add_constraint (solver,
|
||||
a, GTK_CONSTRAINT_RELATION_EQ, e,
|
||||
GTK_CONSTRAINT_WEIGHT_REQUIRED);
|
||||
|
||||
gtk_constraint_solver_resolve (solver);
|
||||
|
||||
g_assert_cmpfloat_with_epsilon (gtk_constraint_variable_get_value (a), 0.0, 0.001);
|
||||
g_assert_cmpfloat_with_epsilon (gtk_constraint_variable_get_value (b), 0.0, 0.001);
|
||||
|
||||
gtk_constraint_solver_add_edit_variable (solver, a, GTK_CONSTRAINT_WEIGHT_REQUIRED);
|
||||
gtk_constraint_solver_begin_edit (solver);
|
||||
|
||||
gtk_constraint_solver_suggest_value (solver, a, 2.0);
|
||||
gtk_constraint_solver_resolve (solver);
|
||||
|
||||
g_assert_cmpfloat_with_epsilon (gtk_constraint_variable_get_value (a), 2.0, 0.001);
|
||||
g_assert_cmpfloat_with_epsilon (gtk_constraint_variable_get_value (b), 2.0, 0.001);
|
||||
|
||||
gtk_constraint_solver_suggest_value (solver, a, 10.0);
|
||||
gtk_constraint_solver_resolve (solver);
|
||||
|
||||
g_assert_cmpfloat_with_epsilon (gtk_constraint_variable_get_value (a), 10.0, 0.001);
|
||||
g_assert_cmpfloat_with_epsilon (gtk_constraint_variable_get_value (b), 10.0, 0.001);
|
||||
|
||||
gtk_constraint_variable_unref (a);
|
||||
gtk_constraint_variable_unref (b);
|
||||
|
||||
g_object_unref (solver);
|
||||
}
|
||||
|
||||
static void
|
||||
constraint_solver_paper (void)
|
||||
{
|
||||
GtkConstraintSolver *solver = gtk_constraint_solver_new ();
|
||||
|
||||
GtkConstraintVariable *left = gtk_constraint_solver_create_variable (solver, NULL, "left", 0.0);
|
||||
GtkConstraintVariable *middle = gtk_constraint_solver_create_variable (solver, NULL, "middle", 0.0);
|
||||
GtkConstraintVariable *right = gtk_constraint_solver_create_variable (solver, NULL, "right", 0.0);
|
||||
|
||||
GtkConstraintExpressionBuilder builder;
|
||||
GtkConstraintExpression *expr;
|
||||
|
||||
gtk_constraint_expression_builder_init (&builder, solver);
|
||||
gtk_constraint_expression_builder_term (&builder, left);
|
||||
gtk_constraint_expression_builder_plus (&builder);
|
||||
gtk_constraint_expression_builder_term (&builder, right);
|
||||
gtk_constraint_expression_builder_divide_by (&builder);
|
||||
gtk_constraint_expression_builder_constant (&builder, 2.0);
|
||||
expr = gtk_constraint_expression_builder_finish (&builder);
|
||||
gtk_constraint_solver_add_constraint (solver,
|
||||
middle, GTK_CONSTRAINT_RELATION_EQ, expr,
|
||||
GTK_CONSTRAINT_WEIGHT_REQUIRED);
|
||||
|
||||
gtk_constraint_expression_builder_init (&builder, solver);
|
||||
gtk_constraint_expression_builder_term (&builder, left);
|
||||
gtk_constraint_expression_builder_plus (&builder);
|
||||
gtk_constraint_expression_builder_constant (&builder, 10.0);
|
||||
expr = gtk_constraint_expression_builder_finish (&builder);
|
||||
gtk_constraint_solver_add_constraint (solver,
|
||||
right, GTK_CONSTRAINT_RELATION_EQ, expr,
|
||||
GTK_CONSTRAINT_WEIGHT_REQUIRED);
|
||||
|
||||
expr = gtk_constraint_expression_new (100.0);
|
||||
gtk_constraint_solver_add_constraint (solver,
|
||||
right, GTK_CONSTRAINT_RELATION_LE, expr,
|
||||
GTK_CONSTRAINT_WEIGHT_REQUIRED);
|
||||
|
||||
expr = gtk_constraint_expression_new (0.0);
|
||||
gtk_constraint_solver_add_constraint (solver,
|
||||
left, GTK_CONSTRAINT_RELATION_GE, expr,
|
||||
GTK_CONSTRAINT_WEIGHT_REQUIRED);
|
||||
|
||||
g_test_message ("Check constraints hold");
|
||||
|
||||
g_assert_cmpfloat_with_epsilon (gtk_constraint_variable_get_value (middle),
|
||||
(gtk_constraint_variable_get_value (left) + gtk_constraint_variable_get_value (right)) / 2.0,
|
||||
0.001);
|
||||
g_assert_cmpfloat_with_epsilon (gtk_constraint_variable_get_value (right),
|
||||
gtk_constraint_variable_get_value (left) + 10.0,
|
||||
0.001);
|
||||
g_assert_cmpfloat (gtk_constraint_variable_get_value (right), <=, 100.0);
|
||||
g_assert_cmpfloat (gtk_constraint_variable_get_value (left), >=, 0.0);
|
||||
|
||||
gtk_constraint_variable_set_value (middle, 45.0);
|
||||
gtk_constraint_solver_add_stay_variable (solver, middle, GTK_CONSTRAINT_WEIGHT_WEAK);
|
||||
|
||||
g_test_message ("Check constraints hold after setting middle");
|
||||
|
||||
g_assert_cmpfloat_with_epsilon (gtk_constraint_variable_get_value (middle),
|
||||
(gtk_constraint_variable_get_value (left) + gtk_constraint_variable_get_value (right)) / 2.0,
|
||||
0.001);
|
||||
g_assert_cmpfloat_with_epsilon (gtk_constraint_variable_get_value (right),
|
||||
gtk_constraint_variable_get_value (left) + 10.0,
|
||||
0.001);
|
||||
g_assert_cmpfloat (gtk_constraint_variable_get_value (right), <=, 100.0);
|
||||
g_assert_cmpfloat (gtk_constraint_variable_get_value (left), >=, 0.0);
|
||||
|
||||
g_assert_cmpfloat_with_epsilon (gtk_constraint_variable_get_value (left), 40.0, 0.001);
|
||||
g_assert_cmpfloat_with_epsilon (gtk_constraint_variable_get_value (middle), 45.0, 0.001);
|
||||
g_assert_cmpfloat_with_epsilon (gtk_constraint_variable_get_value (right), 50.0, 0.001);
|
||||
|
||||
gtk_constraint_variable_unref (left);
|
||||
gtk_constraint_variable_unref (middle);
|
||||
gtk_constraint_variable_unref (right);
|
||||
|
||||
g_object_unref (solver);
|
||||
}
|
||||
|
||||
int
|
||||
main (int argc, char *argv[])
|
||||
{
|
||||
g_test_init (&argc, &argv, NULL);
|
||||
setlocale (LC_ALL, "C");
|
||||
|
||||
g_test_add_func ("/constraint-solver/paper", constraint_solver_paper);
|
||||
g_test_add_func ("/constraint-solver/simple", constraint_solver_simple);
|
||||
g_test_add_func ("/constraint-solver/constant/eq", constraint_solver_variable_eq_constant);
|
||||
g_test_add_func ("/constraint-solver/constant/ge", constraint_solver_variable_geq_constant);
|
||||
g_test_add_func ("/constraint-solver/constant/le", constraint_solver_variable_leq_constant);
|
||||
g_test_add_func ("/constraint-solver/stay/simple", constraint_solver_stay);
|
||||
g_test_add_func ("/constraint-solver/stay/eq", constraint_solver_eq_with_stay);
|
||||
g_test_add_func ("/constraint-solver/cassowary", constraint_solver_cassowary);
|
||||
g_test_add_func ("/constraint-solver/edit/required", constraint_solver_edit_var_required);
|
||||
g_test_add_func ("/constraint-solver/edit/suggest", constraint_solver_edit_var_suggest);
|
||||
|
||||
return g_test_run ();
|
||||
}
|
||||
@ -17,6 +17,11 @@ tests = [
|
||||
['builderparser'],
|
||||
['cellarea'],
|
||||
['check-icon-names'],
|
||||
['constraint-solver', [
|
||||
'../../gtk/gtkconstraintsolver.c',
|
||||
'../../gtk/gtkconstraintexpression.c',
|
||||
], ['-DGTK_COMPILATION', '-UG_ENABLE_DEBUG']
|
||||
],
|
||||
['cssprovider'],
|
||||
['rbtree-crash', ['../../gtk/gtkrbtree.c'], ['-DGTK_COMPILATION', '-UG_ENABLE_DEBUG']],
|
||||
['defaultvalue'],
|
||||
|
||||
Loading…
Reference in New Issue
Block a user