1 files changed, 38 insertions, 1 deletions

diff --git a/thumbs.c b/thumbs.c
index f1703e8..c369395 100644
--- a/thumbs.c
+++ b/thumbs.c
@@ -115,7 +115,6 @@ void tns_render(tns_t *tns, win_t *win) {
 	}
 
 	tns_highlight(tns, win, -1);
-	win_draw(win);
 }
 
 void tns_highlight(tns_t *tns, win_t *win, int old) {
@@ -132,4 +131,42 @@ void tns_highlight(tns_t *tns, win_t *win, int old) {
 		t = &tns->thumbs[tns->sel];
 		win_draw_rect(win, t->x - 2, t->y - 2, t->w + 4, t->h + 4, True);
 	}
+
+	win_draw(win);
+}
+
+void tns_move_selection(tns_t *tns, win_t *win, movedir_t dir) {
+	int sel;
+
+	if (!tns || !win)
+		return;
+
+	sel = tns->sel;
+
+	switch (dir) {
+		case MOVE_LEFT:
+			if (sel % tns->cols > 0) {
+				--tns->sel;
+				tns_highlight(tns, win, sel);
+			}
+			break;
+		case MOVE_RIGHT:
+			if (sel % tns->cols < tns->cols - 1 && sel < tns->cnt - 1) {
+				++tns->sel;
+				tns_highlight(tns, win, sel);
+			}
+			break;
+		case MOVE_UP:
+			if (sel / tns->cols > 0) {
+				tns->sel -= tns->cols;
+				tns_highlight(tns, win, sel);
+			}
+			break;
+		case MOVE_DOWN:
+			if (sel / tns->cols < tns->rows - 1 && sel + tns->cols < tns->cnt) {
+				tns->sel += tns->cols;
+				tns_highlight(tns, win, sel);
+			}
+			break;
+	}
 }