Method drag_update_selection_and_insert_mark

Lib/idlelib/sidebar.py:190–197

Helper function for drag and selection event handlers.

(y_coord)

        auto_scrolling_after_id = None

        def drag_update_selection_and_insert_mark(y_coord):
            """Helper function for drag and selection event handlers."""
            lineno = get_lineno(self.text, f"@0,{y_coord}")
            a, b = sorted([start_line, lineno])
            self.text.tag_remove("sel", "1.0", "end")
            self.text.tag_add("sel", f"{a}.0", f"{b+1}.0")
            self.text.mark_set("insert",
                               f"{lineno if lineno == a else lineno + 1}.0")

        def b1_mousedown_handler(event):
            nonlocal start_line