[gimp] app: more gimp_unit_get_scaled_digits() usage.

[Jehan Pagès <jehanp src gnome org>]

commit f44fb1ece4648bea50ed8723b0769524af33a47a
Author: Jehan <jehan girinstud io>
Date:   Tue Jan 24 00:22:42 2017 +0100

    app: more gimp_unit_get_scaled_digits() usage.
    
    The print size displayed in image property and title format should use
    gimp_unit_get_scaled_digits() instead of gimp_unit_get_digits() and
    adding 1, which is quite random or magic number-y.

 app/display/gimpdisplayshell-title.c |    8 ++++----
 app/widgets/gimpimagepropview.c      |    6 ++----
 2 files changed, 6 insertions(+), 8 deletions(-)
---
diff --git a/app/display/gimpdisplayshell-title.c b/app/display/gimpdisplayshell-title.c
index 0191e9e..c528ba9 100644
--- a/app/display/gimpdisplayshell-title.c
+++ b/app/display/gimpdisplayshell-title.c
@@ -360,7 +360,7 @@ gimp_display_shell_format_title (GimpDisplayShell *shell,
                   gimp_image_get_resolution (image, &xres, &yres);
 
                   g_snprintf (unit_format, sizeof (unit_format), "%%.%df",
-                              gimp_unit_get_digits (shell->unit) + 1);
+                              gimp_unit_get_scaled_digits (shell->unit, xres));
                   i += print (title, title_len, i, unit_format,
                               gimp_pixels_to_units (gimp_image_get_width (image),
                                                     shell->unit, xres));
@@ -383,7 +383,7 @@ gimp_display_shell_format_title (GimpDisplayShell *shell,
                   gimp_image_get_resolution (image, &xres, &yres);
 
                   g_snprintf (unit_format, sizeof (unit_format), "%%.%df",
-                              gimp_unit_get_digits (shell->unit) + 1);
+                              gimp_unit_get_scaled_digits (shell->unit, yres));
                   i += print (title, title_len, i, unit_format,
                               gimp_pixels_to_units (gimp_image_get_height (image),
                                                     shell->unit, yres));
@@ -416,7 +416,7 @@ gimp_display_shell_format_title (GimpDisplayShell *shell,
                   gimp_image_get_resolution (image, &xres, &yres);
 
                   g_snprintf (unit_format, sizeof (unit_format), "%%.%df",
-                              gimp_unit_get_digits (shell->unit) + 1);
+                              gimp_unit_get_scaled_digits (shell->unit, xres));
                   i += print (title, title_len, i, unit_format,
                               gimp_pixels_to_units (gimp_item_get_width
                                                     (GIMP_ITEM (drawable)),
@@ -441,7 +441,7 @@ gimp_display_shell_format_title (GimpDisplayShell *shell,
                   gimp_image_get_resolution (image, &xres, &yres);
 
                   g_snprintf (unit_format, sizeof (unit_format), "%%.%df",
-                              gimp_unit_get_digits (shell->unit) + 1);
+                              gimp_unit_get_scaled_digits (shell->unit, yres));
                   i += print (title, title_len, i, unit_format,
                               gimp_pixels_to_units (gimp_item_get_height
                                                     (GIMP_ITEM (drawable)),
diff --git a/app/widgets/gimpimagepropview.c b/app/widgets/gimpimagepropview.c
index 9b28e76..08fc72f 100644
--- a/app/widgets/gimpimagepropview.c
+++ b/app/widgets/gimpimagepropview.c
@@ -417,7 +417,6 @@ gimp_image_prop_view_update (GimpImagePropView *view)
   GimpPrecision      precision;
   GimpUnit           unit;
   gdouble            unit_factor;
-  gint               unit_digits;
   const gchar       *desc;
   gchar              format_buf[32];
   gchar              buf[256];
@@ -437,10 +436,9 @@ gimp_image_prop_view_update (GimpImagePropView *view)
   /*  print size  */
   unit = gimp_get_default_unit ();
 
-  unit_digits = gimp_unit_get_digits (unit);
-
   g_snprintf (format_buf, sizeof (format_buf), "%%.%df × %%.%df %s",
-              unit_digits + 1, unit_digits + 1,
+              gimp_unit_get_scaled_digits (unit, xres),
+              gimp_unit_get_scaled_digits (unit, yres),
               gimp_unit_get_plural (unit));
   g_snprintf (buf, sizeof (buf), format_buf,
               gimp_pixels_to_units (gimp_image_get_width  (image), unit, xres),