在 Qt (C++) 中重新实现 shouldInterruptJavaScript() [英] reimplement the shouldInterruptJavaScript() in Qt (C++)

问题描述

根据 Qt for QWebPage [Slot ShhoudInteruptJavaScript] 的帮助，位于 此处:

<块引用>

当 JavaScript 程序长时间运行时会调用此函数.

如果用户想要停止 JavaScript，实现应该返回 true；否则为假.

默认实现使用 QMessageBox::information 和 QMessageBox::Yes 和 QMessageBox::No 按钮执行查询.

<乙>警告:由于二进制兼容性限制，此函数不是虚拟的.如果您想在 QWebPage 子类中提供您自己的实现，请在您的子类中重新实现 shouldInterruptJavaScript() 插槽.QtWebKit 会动态检测插槽并调用它.

我不希望 javascript 长时间运行时 qt 显示消息.
那么，我该如何重新实现 ShoudInteruptJavaScript?
我应该在哪里创建它?
请给我看样品谢谢

解决方案

您需要的所有信息都在文档中.

创建一个继承自 QWebPage 的新自定义类，确保它是一个 Q_OBJECT 来接收信号.

<前>类 MyFunkyPage :公共 QWebPage {Q_OBJECT公共插槽:bool shouldInterruptJavaScript() {QApplication::processEvents(QEventLoop::AllEvents, 42);//忽略错误返回假；}};

将 QWebView 的页面设置为 QWebPage 的自定义子类.

<前>setPage(new MyFunkyPage());

然后，当您的页面收到此信号时，它不会停止脚本的执行，也不会显示对话框.

According to the help of Qt for QWebPage [Slot ShoudInteruptJavaScript], located here:

This function is called when a JavaScript program is running for a long period of time.

If the user wanted to stop the JavaScript the implementation should return true; otherwise false.

The default implementation executes the query using QMessageBox::information with QMessageBox::Yes and QMessageBox::No buttons.

Warning: Because of binary compatibility constraints, this function is not virtual. If you want to provide your own implementation in a QWebPage subclass, reimplement the shouldInterruptJavaScript() slot in your subclass instead. QtWebKit will dynamically detect the slot and call it.

I don't want qt show a message when javascript runnig for long period of time.
So, how can i reimplement ShoudInteruptJavaScript?
and where should i create it?
Please show me a sample Thanks

解决方案

All the info you need is in the documentation.

Create a new custom class that inherits from QWebPage, make sure it's a Q_OBJECT to receive signals.

class MyFunkyPage : public QWebPage {
    Q_OBJECT
public slots:
    bool shouldInterruptJavaScript() {
        QApplication::processEvents(QEventLoop::AllEvents, 42);
        // Ignore the error
        return false;
    }
};

Set the page of your QWebView to a custom subclass of QWebPage.

setPage(new MyFunkyPage());

Then when your page gets this signal it won't stop the script from executing, and it won't show a dialog.

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