Method createResizeArea

Telegram/SourceFiles/mainwidget.cpp:2590–2601

template <typename MoveCallback, typename FinishCallback>
void MainWidget::createResizeArea(
		object_ptr<Ui::ResizeArea> &area,
		MoveCallback &&moveCallback,
		FinishCallback &&finishCallback) {
	area.create(this);
	area->show();
	area->addMoveLeftCallback(
		std::forward<MoveCallback>(moveCallback));
	area->addMoveFinishedCallback(
		std::forward<FinishCallback>(finishCallback));
	orderWidgets();
}

void MainWidget::ensureFirstColumnResizeAreaCreated() {
	Expects(_dialogs != nullptr);