[giv] Fixed auto-contrast default option and made better 8-bit auto-contrast behavior.

[Dov Grobgeld <dov src gnome org>]

commit 4d91cdf0ea633e0cd02b322bdf2c2f4cb7b80cc1
Author: Dov Grobgeld <dov grobgeld gmail com>
Date:   Sun Jun 10 13:00:38 2012 +0300

    Fixed auto-contrast default option and made better 8-bit auto-contrast behavior.

 configure.in    |    2 +-
 src/giv-win.gob |   20 +++++++++++++-------
 2 files changed, 14 insertions(+), 8 deletions(-)
---
diff --git a/configure.in b/configure.in
index 1f4bacb..6a48b4e 100644
--- a/configure.in
+++ b/configure.in
@@ -5,7 +5,7 @@ AM_CONFIG_HEADER(config.h)
 PACKAGE=givwidget
 GIVWIDGET_API_VERSION=2.0
 
-AM_INIT_AUTOMAKE(giv, 0.9.23beta)
+AM_INIT_AUTOMAKE(giv, 0.9.23beta2)
 
 dnl Use libtool to get shared libraries
 LT_PREREQ
diff --git a/src/giv-win.gob b/src/giv-win.gob
index fd8c6d6..39dfa92 100644
--- a/src/giv-win.gob
+++ b/src/giv-win.gob
@@ -463,8 +463,8 @@ class Giv:Win from Gtk:Window
             img_org = NULL;
         }
     };
-    private double contrast_min = -1;
-    private double contrast_max = -1;
+    private double contrast_min = 0;
+    private double contrast_max = 255;
     private gchar *format = NULL destroy { g_free(format); };
     private GdkPixbuf *img_display = NULL
         destroy {
@@ -936,6 +936,11 @@ class Giv:Win from Gtk:Window
             gtk_ui_manager_get_widget(selfp->menu_manager,
                                       "/menubar/ViewMenu/AutoResize")),
           selfp->giv_settings->default_auto_resize);
+        gtk_check_menu_item_set_active(
+          GTK_CHECK_MENU_ITEM(
+            gtk_ui_manager_get_widget(selfp->menu_manager,
+                                      "/menubar/ViewMenu/AutoContrast")),
+          selfp->giv_settings->default_auto_contrast);
         gtk_image_viewer_set_fill_on_resize(GTK_IMAGE_VIEWER(selfp->w_imgv),
                                             selfp->giv_settings->default_auto_resize);
 
@@ -1125,15 +1130,13 @@ class Giv:Win from Gtk:Window
                                   // output
                                   &selfp->contrast_min,
                                   &selfp->contrast_max);
-        if (new_img->img_type == GIVIMAGE_U8
+        else if (new_img->img_type == GIVIMAGE_U8
             || new_img->img_type == GIVIMAGE_RGB_U8
             || new_img->img_type == GIVIMAGE_RGBA_U8) {
             gtk_widget_hide(selfp->w_color_map_bar);
             selfp->do_view_colormap = FALSE;
-            giv_color_map_set_min_max(GIV_COLOR_MAP(selfp->w_color_map_bar),
-                                      selfp->contrast_min,
-                                      selfp->contrast_max);
-
+            selfp->contrast_min = 0;
+            selfp->contrast_max = 256;
         }
         else {
             gtk_widget_show(selfp->w_color_map_bar);
@@ -1142,6 +1145,9 @@ class Giv:Win from Gtk:Window
                                       selfp->contrast_min,
                                       selfp->contrast_max);
         }
+        giv_color_map_set_min_max(GIV_COLOR_MAP(selfp->w_color_map_bar),
+                                  selfp->contrast_min,
+                                  selfp->contrast_max);
         gtk_check_menu_item_set_active(
             GTK_CHECK_MENU_ITEM(
                 gtk_ui_manager_get_widget(selfp->menu_manager,