[gthumb] transparency button: save the change into the settings

[Paolo Bacchilega <paobac src gnome org>]

commit fece8754db37e00da69e68d5daa450c013d138f4
Author: Paolo Bacchilega <paobac src gnome org>
Date:   Mon Nov 4 12:39:46 2019 +0100

    transparency button: save the change into the settings

 extensions/image_viewer/actions.c | 29 +++++++++++++++++------------
 1 file changed, 17 insertions(+), 12 deletions(-)
---
diff --git a/extensions/image_viewer/actions.c b/extensions/image_viewer/actions.c
index 1f8bdf26..df12dab5 100644
--- a/extensions/image_viewer/actions.c
+++ b/extensions/image_viewer/actions.c
@@ -24,6 +24,7 @@
 #include <gthumb.h>
 #include "actions.h"
 #include "gth-image-viewer-page.h"
+#include "preferences.h"
 
 
 void
@@ -167,25 +168,29 @@ gth_browser_activate_transparency_style (GSimpleAction    *action,
                                         GVariant       *parameter,
                                         gpointer        user_data)
 {
-       GthBrowser     *browser = user_data;
-       const char     *state;
-       GthImageViewer *image_viewer;
+       const char           *state;
+       GthTransparencyStyle  style;
+       GSettings            *settings;
 
        state = g_variant_get_string (parameter, NULL);
-       g_simple_action_set_state (action, g_variant_new_string (state));
-
        if (state == NULL)
                return;
 
-       image_viewer = GTH_IMAGE_VIEWER (gth_image_viewer_page_get_image_viewer (GTH_IMAGE_VIEWER_PAGE 
(gth_browser_get_viewer_page (browser))));
-       if (strcmp (state, "checkered") == 0)
-               gth_image_viewer_set_transparency_style (image_viewer, GTH_TRANSPARENCY_STYLE_CHECKERED);
-       else if (strcmp (state, "white") == 0)
-               gth_image_viewer_set_transparency_style (image_viewer, GTH_TRANSPARENCY_STYLE_WHITE);
+       g_simple_action_set_state (action, g_variant_new_string (state));
+
+       if (strcmp (state, "white") == 0)
+               style = GTH_TRANSPARENCY_STYLE_WHITE;
        else if (strcmp (state, "gray") == 0)
-               gth_image_viewer_set_transparency_style (image_viewer, GTH_TRANSPARENCY_STYLE_GRAY);
+               style = GTH_TRANSPARENCY_STYLE_GRAY;
        else if (strcmp (state, "black") == 0)
-               gth_image_viewer_set_transparency_style (image_viewer, GTH_TRANSPARENCY_STYLE_BLACK);
+               style = GTH_TRANSPARENCY_STYLE_BLACK;
+       else
+               style = GTH_TRANSPARENCY_STYLE_CHECKERED;
+
+       settings = g_settings_new (GTHUMB_IMAGE_VIEWER_SCHEMA);
+       g_settings_set_enum (settings, PREF_IMAGE_VIEWER_TRANSPARENCY_STYLE, style);
+
+       g_object_unref (settings);
 }