[gtk/constraint-grid] constraint layout: Freeze solver for grids

[Matthias Clasen <matthiasc src gnome org>]

commit d8db962995434bf68e296578fbde85d6f568b676
Author: Matthias Clasen <mclasen redhat com>
Date:   Wed Jun 26 20:08:46 2019 +0000

    constraint layout: Freeze solver for grids
    
    While inserting a possibly big grid layout,
    freeze the solver. It does not end up helping
    too much, since there are code paths in the
    solver the end up optimizing for each addition
    anyway :(

 gtk/gtkconstraintlayout.c | 4 ++++
 1 file changed, 4 insertions(+)
---
diff --git a/gtk/gtkconstraintlayout.c b/gtk/gtkconstraintlayout.c
index 4181564862..f9cb726b8e 100644
--- a/gtk/gtkconstraintlayout.c
+++ b/gtk/gtkconstraintlayout.c
@@ -1294,6 +1294,8 @@ layout_add_grid_constraint (GtkConstraintLayout *manager,
   if (solver == NULL)
     return;
 
+  gtk_constraint_solver_freeze (solver);
+
   refs = g_ptr_array_new ();
 
   n_rows = n_cols = 0;
@@ -1332,4 +1334,6 @@ layout_add_grid_constraint (GtkConstraintLayout *manager,
   g_free (rows);
   g_free (cols);
   g_ptr_array_unref (refs);
+
+  gtk_constraint_solver_thaw (solver);
 }