Method createChildMenu

src/app/MenuBar.cpp:644–680

struct SampleRateItem : ui::MenuItem {
	ui::Menu* createChildMenu() override {
		ui::Menu* menu = new ui::Menu;

		// Auto sample rate
		std::string rightText;
		if (settings::sampleRate == 0) {
			float sampleRate = APP->engine->getSampleRate();
			rightText += string::f("(%g kHz) ", sampleRate / 1000.f);
		}
		menu->addChild(createCheckMenuItem(string::translate("MenuBar.engine.sampleRate.auto"), rightText,
			[=]() {return settings::sampleRate == 0;},
			[=]() {settings::sampleRate = 0;}
		));

		// Power-of-2 oversample times 44.1kHz or 48kHz
		for (int i = -2; i <= 4; i++) {
			for (int j = 0; j < 2; j++) {
				float oversample = std::pow(2.f, i);
				float sampleRate = (j == 0) ? 44100.f : 48000.f;
				sampleRate *= oversample;

				std::string text = string::f("%g kHz", sampleRate / 1000.f);
				std::string rightText;
				if (oversample > 1.f) {
					rightText += string::f("(%.0fx)", oversample);
				}
				else if (oversample < 1.f) {
					rightText += string::f("(1/%.0fx)", 1.f / oversample);
				}
				menu->addChild(createCheckMenuItem(text, rightText,
					[=]() {return settings::sampleRate == sampleRate;},
					[=]() {settings::sampleRate = sampleRate;}
				));
			}
		}
		return menu;
	}
};