Method data_rows_changed

src/pie.rs:168–173

(&self, record: DataCollectionChangeRecord)

    }

    fn data_rows_changed(&self, record: DataCollectionChangeRecord) {
        self.base
            .update_channel_visible(record.index, record.removed_count, record.added_count);
        self.base.data_rows_changed(record);
        self.base.update_legend_content();
    }

    fn get_entity_group_index(&self, x: f64, y: f64) -> i64 {
        let p = Point::new(x, y);