GnomeScreensaver: fix #monitors calculation, added getNumMonitors()

GnomeScreensaver.cc

@@ -43,6 +43,12 @@ GnomeScreensaver::GnomeScreensaver(int *argc, char ***argv,
     GtkStateType state;
     GError *error = NULL;
 
+    struct timeval tv;
+    gettimeofday(&tv, NULL);
+    m_start_msec = tv.tv_sec * 1000 + tv.tv_usec / 1000;
+
+    m_n_monitors = 1;
+
     gtk_init_with_args (argc, argv,
         _(""),
         options, NULL, &error);
@@ -94,12 +100,6 @@ GnomeScreensaver::GnomeScreensaver(int *argc, char ***argv,
     gtk_widget_show (window);
 
     gtk_timeout_add(interval_msec, update, this);
-
-    struct timeval tv;
-    gettimeofday(&tv, NULL);
-    m_start_msec = tv.tv_sec * 1000 + tv.tv_usec / 1000;
-
-    m_n_monitors = 1;
 }
 
 uint32_t GnomeScreensaver::getTicks()
@@ -144,13 +144,14 @@ gboolean GnomeScreensaver::configureCB(GtkWidget *da, GdkEventConfigure *event)
 
     m_width = da->allocation.width;
     m_height = da->allocation.height;
-    m_aspect_ratio = (float)m_width / (float)m_height;
 
     for (m_n_monitors = 1;
          (double)m_width/(double)m_n_monitors/(double)m_height > MAX_ASPECT;
          m_n_monitors++)
         ;
 
+    m_aspect_ratio = (float)m_width / (float)m_n_monitors / (float)m_height;
+
     gboolean rc = m_configure_callback(*this);
 
     gdk_gl_drawable_gl_end(gldrawable);

GnomeScreensaver.h

@@ -36,6 +36,7 @@ class GnomeScreensaver
         int getWidth() { return m_width; }
         int getHeight() { return m_height; }
         float getAspectRatio() { return m_aspect_ratio; }
+        int getNumMonitors() { return m_n_monitors; }
 
     protected:
         GtkWidget *m_drawing_area;