[aravis] viewer: improve frame rate entry.

[Emmanuel Pacaud <emmanuel src gnome org>]

commit b118af23e3e35b3651ba1ab44405d454e4653ae9
Author: Emmanuel Pacaud <emmanuel gnome org>
Date:   Thu May 2 22:27:07 2013 +0200

    viewer: improve frame rate entry.
    
    Frame rate will be now applied on enter, instead of after each key stroke.
    After the frame is set, the actual frame rate is displayed in the text entry.

 viewer/arvviewer.c |   22 +++++++++++++++++++---
 1 files changed, 19 insertions(+), 3 deletions(-)
---
diff --git a/viewer/arvviewer.c b/viewer/arvviewer.c
index 636504b..2bb52bc 100644
--- a/viewer/arvviewer.c
+++ b/viewer/arvviewer.c
@@ -201,11 +201,26 @@ arv_viewer_new_buffer_cb (ArvStream *stream, ArvViewer *viewer)
 void
 arv_viewer_frame_rate_entry_cb (GtkEntry *entry, ArvViewer *viewer)
 {
-       const char *text;
+       char *text;
+       double frame_rate;
 
-       text = gtk_entry_get_text (entry);
+       text = (char *) gtk_entry_get_text (entry);
 
        arv_camera_set_frame_rate (viewer->camera, g_strtod (text, NULL));
+
+       frame_rate = arv_camera_get_frame_rate (viewer->camera);
+       text = g_strdup_printf ("%g", frame_rate);
+       gtk_entry_set_text (entry, text);
+       g_free (text);
+}
+
+static gboolean
+arv_viewer_frame_rate_entry_focus_cb (GtkEntry *entry, GdkEventFocus *event,
+                   ArvViewer *viewer)
+{
+       arv_viewer_frame_rate_entry_cb (entry, viewer);
+
+       return FALSE;
 }
 
 void
@@ -770,7 +785,8 @@ arv_viewer_new (void)
        g_signal_connect (viewer->flip_vertical_toggle, "clicked", G_CALLBACK (arv_viewer_flip_vertical_cb), 
viewer);
        g_signal_connect (viewer->camera_combo_box, "changed", G_CALLBACK (arv_viewer_select_camera_cb), 
viewer);
 
-       g_signal_connect (viewer->frame_rate_entry, "changed", G_CALLBACK (arv_viewer_frame_rate_entry_cb), 
viewer);
+       g_signal_connect (viewer->frame_rate_entry, "activate", G_CALLBACK (arv_viewer_frame_rate_entry_cb), 
viewer);
+       g_signal_connect (viewer->frame_rate_entry, "focus-out-event", G_CALLBACK 
(arv_viewer_frame_rate_entry_focus_cb), viewer);
 
        viewer->exposure_spin_changed = g_signal_connect (viewer->exposure_spin_button, "value-changed",
                                                          G_CALLBACK (arv_viewer_exposure_spin_cb), viewer);