Add 'Has' to layout flags

layout_flags.go

@@ -75,6 +75,7 @@ const (
 	LFSizeAll = LayoutFlag(0x11110000)
 )
 
+func (f LayoutFlag) Has(fl LayoutFlag) bool { return f&fl != 0 }
 func (f LayoutFlag) Add(fl LayoutFlag)      { f |= fl }
 func (f LayoutFlag) Remove(fl LayoutFlag)   { f = f &^ fl }
 func (f LayoutFlag) ClearAll() {

wdgt_simple_list.go

@@ -227,6 +227,12 @@ func (w *SimpleList) MinW() int {
 
 func (w *SimpleList) MinH() int { return 4 }
 
+func (w *SimpleList) getItemAt(idx int) {
+	for idx >= len(w.list) {
+		idx--
+	}
+
+}
 func (w *SimpleList) SetCursorWrap(b bool) { w.cursorWrap = b }
 func (w *SimpleList) MoveUp() bool {
 	if w.cursor > 0 {
@@ -328,7 +334,12 @@ func (w *SimpleList) SetItem(idx int, txt string) {
 		w.list[idx] = txt
 	}
 }
-func (w *SimpleList) SelectedIndex() int { return w.cursor }
+func (w *SimpleList) SelectedIndex() int {
+	if w.cursor >= len(w.list) {
+		w.cursor = len(w.list) - 1
+	}
+	return w.cursor
+}
 func (w *SimpleList) SetSelectedIndex(i int) {
 	if i < 0 {
 		i = 0
@@ -350,6 +361,11 @@ func (w *SimpleList) Log(txt string, args ...any) {
 
 func (w *SimpleList) SetOnChange(c func(int, string) bool) { w.onChange = c }
 
-func (w *SimpleList) GetSelectedItem() string               { return w.list[w.cursor] }
+func (w *SimpleList) GetSelectedItem() string {
+	if w.cursor >= len(w.list) {
+		w.cursor = len(w.list) - 1
+	}
+	return w.list[w.cursor]
+}
 func (w *SimpleList) GetAllItems() []string                 { return w.list }
 func (w *SimpleList) GetAllItemStyles() map[int]tcell.Style { return w.itemsStyle }