in src/behavior.ts [37:52]
public bindEvents(options: BulletBehaviorOptions, selectionHandler: ISelectionHandler) {
this.options = options;
let clearCatcher = options.clearCatcher;
options.valueRects.on("click", (event: MouseEvent, d: BarValueRect) => {
selectionHandler.handleSelection(d, event.ctrlKey || event.metaKey);
});
options.rects.on("click", (event: MouseEvent, d: BarRect) => {
selectionHandler.handleSelection(d, event.ctrlKey || event.metaKey);
});
clearCatcher.on("click", () => {
selectionHandler.handleClearSelection();
});
}