List can now add multiple entries at once, and clear all of them

elements/basic/list.go

@@ -244,13 +244,16 @@ func (element *List) CountEntries () (count int) {
 	return len(element.entries)
 }
 
-// Append adds an entry to the end of the list.
-func (element *List) Append (entry ListEntry) {
+// Append adds one or more entries to the end of the list.
+func (element *List) Append (entries ...ListEntry) {
 	// append
-	entry = element.resizeEntryToFit(entry)
-	entry.SetTheme(element.theme.Theme)
-	entry.SetConfig(element.config)
-	element.entries = append(element.entries, entry)
+	for index, entry := range entries {
+		entry = element.resizeEntryToFit(entry)
+		entry.SetTheme(element.theme.Theme)
+		entry.SetConfig(element.config)
+		entries[index] = entry
+	}
+	element.entries = append(element.entries, entries...)
 
 	// recalculate, redraw, notify
 	element.updateMinimumSize()
@@ -313,6 +316,19 @@ func (element *List) Remove (index int) {
 	element.scrollBoundsChange()
 }
 
+// Clear removes all entries from the list.
+func (element *List) Clear () {
+	element.entries = nil
+
+	// recalculate, redraw, notify
+	element.updateMinimumSize()
+	if element.core.HasImage() {
+		element.draw()
+		element.core.DamageAll()
+	}
+	element.scrollBoundsChange()
+}
+
 // Replace replaces the entry at the specified index with another. If the index
 // is out of bounds, it panics.
 func (element *List) Replace (index int, entry ListEntry) {