Merge pull request #44870 from alexpech12/fix-rich-text-label-set-visible-characters

Keep RichTextLabel visible character properties in sync

doc/classes/RichTextLabel.xml

@@ -455,6 +455,7 @@
 		</member>
 		<member name="visible_characters" type="int" setter="set_visible_characters" getter="get_visible_characters" default="-1">
 			The restricted number of characters to display in the label. If [code]-1[/code], all characters will be displayed.
+			[b]Note:[/b] Setting this property updates [member percent_visible] based on current [method get_total_character_count].
 		</member>
 	</members>
 	<signals>

scene/gui/rich_text_label.cpp

@@ -3677,6 +3677,7 @@ void RichTextLabel::set_percent_visible(float p_percent) {
 		}
 		main->first_invalid_line = 0; //invalidate ALL
 		_validate_line_caches(main);
+		_change_notify("visible_characters");
 		update();
 	}
 }
@@ -3890,6 +3891,15 @@ void RichTextLabel::_bind_methods() {
 
 void RichTextLabel::set_visible_characters(int p_visible) {
 	visible_characters = p_visible;
+	if (p_visible == -1) {
+		percent_visible = 1;
+	} else {
+		int total_char_count = get_total_character_count();
+		if (total_char_count > 0) {
+			percent_visible = (float)p_visible / (float)total_char_count;
+		}
+	}
+	_change_notify("percent_visible");
 	update();
 }