+
+ TreePath a_;
+ TreePath b_;
+ bool range;
+ if (poster_mode_) {
+ range = icons.get_visible_range (out a_, out b_);
+ } else {
+ range = tree.get_visible_range (out a_, out b_);
+ }
+ if (range) {
+ // We know the list store is flat
+ int a = a_.get_indices ()[0];
+ int b = b_.get_indices ()[0];
+ assert (a <= b);
+
+ if (a == last_a && b == last_b)
+ return;
+
+ if (a > last_b || b < last_a) {
+ check_posters (a, b);
+ } else if (a >= last_a && b > last_b) {
+ check_posters (last_b + 1, b);
+ } else if (b <= last_b && a < last_a) {
+ check_posters (a, last_a - 1);
+ }
+
+ last_a = a;
+ last_b = b;
+ }
+ }
+
+ private void check_posters (int a, int b) {
+ for (int i = a; i <= b; i++) {
+ var path = new TreePath.from_indices (i);
+ TreeIter iter;
+ if (store.get_iter (out iter, path)) {
+ Movie movie;
+ store.get (iter, MovieListStore.Columns.MOVIE, out movie);
+ if (movie != null) {
+ if (poster_mode_) {
+ if (movie.poster == null || movie.poster.small == null) try {
+ poster_factory.queue_thumbnail (movie, Poster.SMALL_WIDTH, Poster.SMALL_HEIGHT, false, receive_poster_small);
+ } catch (Error e) {
+ warning ("Failed to queue poster request: %s\n", e.message);
+ }
+ } else {
+ if (movie.poster == null || movie.poster.icon == null) try {
+ poster_factory.queue_thumbnail (movie, Poster.ICON_WIDTH, Poster.ICON_HEIGHT, false, receive_poster_icon);
+ } catch (Error e) {
+ warning ("Failed to queue poster request: %s\n", e.message);
+ }
+ }
+ }
+ }
+ }