simplelist: Fix simplelist_set_line_count() so it actually sets the count

(hopefully) Fixes FS#12838

Change-Id: I932184afaf7b65121a0c459cd03c8482e3bad22b

2 files changed, 32 insertions, 2 deletions

diff --git a/apps/debug_menu.c b/apps/debug_menu.c
index 265d8988b5..59a58212ad 100644
--- a/apps/debug_menu.c
+++ b/apps/debug_menu.c
@@ -1838,6 +1838,31 @@ static bool dbg_save_roms(void)
 }
 #endif /* CPU */
 
+static int radio_callback(int btn, struct gui_synclist *lists)
+{
+    (void)lists;
+    if (btn == ACTION_STD_CANCEL)
+        return btn;
+    simplelist_set_line_count(1);
+    simplelist_addline("test one");
+    simplelist_addline("test two");
+    simplelist_addline("test dsaf");
+    simplelist_addline("test asdfsad");
+    simplelist_addline("-------------");
+    return ACTION_REDRAW;
+}
+static bool dbg_fm_radio(void)
+{
+    struct simplelist_info info;
+    info.scroll_all = true;
+    simplelist_info_init(&info, "FM Radio", 1, NULL);
+    simplelist_set_line_count(0);
+    simplelist_addline("HW detected: %s", "no");
+
+    info.action_callback = radio_callback;
+    info.hide_selection = true;
+    return simplelist_show_list(&info);
+}
 #ifndef SIMULATOR
 #if CONFIG_TUNER
 
@@ -2324,6 +2349,7 @@ static const struct {
         { "FM Radio", dbg_fm_radio },
 #endif
 #endif
+    { "TEST HERE", dbg_fm_radio},
 #if defined(HAVE_EEPROM) && !defined(HAVE_EEPROM_SETTINGS)
         { "Write back EEPROM", dbg_write_eeprom },
 #endif
diff --git a/apps/gui/list.c b/apps/gui/list.c
index cc43843e46..27032378c3 100644
--- a/apps/gui/list.c
+++ b/apps/gui/list.c
@@ -843,8 +843,12 @@ void simplelist_set_line_count(int lines)
         simplelist_line_remaining = sizeof(simplelist_buffer);
         simplelist_line_count = 0;
     }
-    else if (lines >= SIMPLELIST_MAX_LINES)
-        simplelist_line_count = SIMPLELIST_MAX_LINES;
+    else if (lines < simplelist_line_count) {
+        char *end = simplelist_text[lines];
+        simplelist_line_pos = end - simplelist_buffer;
+        simplelist_line_remaining = sizeof(simplelist_buffer) - simplelist_line_pos;
+        simplelist_line_count = lines;
+    }
 }
 /* get the current amount of lines shown */
 int simplelist_get_line_count(void)