ui/ncurses: Reduce unnecessary calls to redrawwin

[petitboot] / ui / ncurses / nc-config.c

diff --git a/ui/ncurses/nc-config.c b/ui/ncurses/nc-config.c
index 17cc380172cb15394fb0b3bb73b84cfd270d8d4d..c45df34e9afce17f5d641206bade8923e3bff252 100644 (file)
--- a/ui/ncurses/nc-config.c
+++ b/ui/ncurses/nc-config.c
@@ -57,6 +57,7 @@ struct config_screen {
 
        bool                    exit;
        bool                    show_help;
+       bool                    need_redraw;
        void                    (*on_exit)(struct cui *);
 
        int                     scroll_y;
@@ -146,6 +147,7 @@ static void config_screen_process_key(struct nc_scr *scr, int key)
 
        } else if (screen->show_help) {
                screen->show_help = false;
+               screen->need_redraw = true;
                cui_show_help(screen->cui, _("System Configuration"),
                                &config_help_text);
 
@@ -165,7 +167,10 @@ static int config_screen_post(struct nc_scr *scr)
        struct config_screen *screen = config_screen_from_scr(scr);
        widgetset_post(screen->widgetset);
        nc_scr_frame_draw(scr);
-       redrawwin(scr->main_ncw);
+       if (screen->need_redraw) {
+               redrawwin(scr->main_ncw);
+               screen->need_redraw = false;
+       }
        wrefresh(screen->scr.main_ncw);
        pad_refresh(screen);
        return 0;
@@ -859,6 +864,7 @@ struct config_screen *config_screen_init(struct cui *cui,
 
        screen->cui = cui;
        screen->on_exit = on_exit;
+       screen->need_redraw = false;
        screen->label_x = 2;
        screen->field_x = 17;