What are the applications of C++ functions in GUI accessibility and internationalization?

C function provides functions for setting accessible attributes in GUI accessibility, such as setAttribute() and setRole(), to improve the access experience of users with different abilities. In terms of internationalization, the QLocale functions provide languageToString() and countryToString() to obtain language and country codes to dynamically set GUI text based on the system language or user preference.

Application of C functions in GUI accessibility and internationalization

1. GUI accessibility

1. Commonly used functions

void QAccessible::setAttribute(QAccessible::Attribute attribute, JAWSLib::Value value);
void QAccessible::setRole(QAccessible::Role role);

2. Practical case: Create accessible buttons

// 创建按钮
QPushButton* button = new QPushButton("Click Me");

// 设置可访问性属性
button->setAccessibleName("My Accessible Button");
button->setAccessibleDescription("This button opens a new window.");
button->setAccessibleRole(QAccessible::PushButton);

// 添加单击处理程序
QObject::connect(button, &QPushButton::clicked, [=]() {
    // ...执行操作
});

2. Internationalization

1. Commonly used functions

QString QLocale::languageToString(QLocale::Language language);
QString QLocale::countryToString(QLocale::Country country);

2. Practical case: setting GUI text according to the system language

// 获取当前系统语言
QLocale locale = QLocale::system();

// 设置 GUI 文本
QLabel* label = new QLabel;
label->setText(tr("Welcome to the application!"));

// "tr" 函数将文本标记为可翻译，翻译器可以找到并翻译该文本。

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