new function to set the adjustments value without causing a current

Sun May  3 19:45:09 1998  Tim Janik  <timj@gtk.org>

        * gtk/gtkadjustment.c (gtk_adjustment_assimilate_value): new function
                to set the adjustments value without causing a current emission of
                        "value_changed" to be restarted.

                                * gtk/gtksignal.c: added new functions to retrive the number of
                                        existing emissions for a certain signal.
                                                (gtk_signal_n_emissions): new function.
                                                        (gtk_signal_n_emissions_by_name): new function.

1 files changed, 18 insertions, 4 deletions

diff --git a/gtk/gtkadjustment.c b/gtk/gtkadjustment.c
index b921cc146e..bcf2ff1b17 100644
--- a/gtk/gtkadjustment.c
+++ b/gtk/gtkadjustment.c
@@ -132,17 +132,31 @@ gtk_adjustment_set_value (GtkAdjustment        *adjustment,
     {
       adjustment->value = value;
 
-      gtk_signal_emit_by_name (GTK_OBJECT (adjustment), "value_changed");
+      gtk_adjustment_value_changed (adjustment);
     }
 }
 
 void
+gtk_adjustment_assimilate_value (GtkAdjustment        *adjustment,
+				 gfloat                value)
+{
+  g_return_if_fail (adjustment != NULL);
+  g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
+
+  if (gtk_signal_n_emissions (GTK_OBJECT (adjustment),
+			      adjustment_signals[VALUE_CHANGED]))
+    adjustment->value = CLAMP (value, adjustment->lower, adjustment->upper);
+  else
+    gtk_adjustment_set_value (adjustment, value);
+}
+
+void
 gtk_adjustment_changed (GtkAdjustment        *adjustment)
 {
   g_return_if_fail (adjustment != NULL);
   g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
 
-  gtk_signal_emit_by_name (GTK_OBJECT (adjustment), "changed");
+  gtk_signal_emit (GTK_OBJECT (adjustment), adjustment_signals[CHANGED]);
 }
 
 void
@@ -151,7 +165,7 @@ gtk_adjustment_value_changed (GtkAdjustment        *adjustment)
   g_return_if_fail (adjustment != NULL);
   g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
 
-  gtk_signal_emit_by_name (GTK_OBJECT (adjustment), "value_changed");
+  gtk_signal_emit (GTK_OBJECT (adjustment), adjustment_signals[VALUE_CHANGED]);
 }
 
 void
@@ -181,5 +195,5 @@ gtk_adjustment_clamp_page (GtkAdjustment *adjustment,
     }
 
   if (need_emission)
-    gtk_signal_emit_by_name (GTK_OBJECT (adjustment), "value_changed");
+    gtk_adjustment_value_changed (adjustment);
 }