Qwebenginepage runjavascript Feb 17, 2015 · An alternative and much simpler way of communication with the page is to use runJavaScript function:. Running the Example. 1: runJavaScript returns values that change after being quickly called a second time. Apr 28, 2020 · How to get return Value from PyQt's QWebEnginePage. 调用JavaScript并获取返回值. by closing the tab. But I had to spawn new thread because, in fact, thread calling runJavaScript and thread executing callback are the same threads Jul 21, 2019 · In your runJavascript function either you emit a signal or you can call a function of the save class and then pass the value in that function. Sometimes the pointer to the QWebEngineView inside the QWebEnginePage::runJavaScript callback is undefined. 运行包含的 JavaScript 代码在 scriptSource . e. page()->runJavaScript(js,[this](const QVariant &v) {newFunction(v);} Then in newFunction you can carry out the further code. 在QT中，可以通过QWebEnginePage的runJavaScript方法来执行网页中的JavaScript代码，并且可以通过回调函数来获取执行结果。下面是一个简单的示例代码： Aug 6, 2021 · Hello, I'm using a QWebEngine. view->page()->runJavaScript("alert('Hello from C++');"); It has its limitations: the call must be initiated from the C++ side and you can get only synchronous response from JS. runJavaScript() to read a js string in order to display a js into a mainWindow and a plugin. By deleting the view void QWebEnginePage::runJavaScript(const QString & scriptSource, quint32 worldId = 0，const std::function<void (const QVariant &)>& resultCallback = {}) 运行包含在 scriptSource 而不检查页面的 DOM 是否已构建。 void QWebEnginePage:: runJavaScript (const QString & scriptSource , FunctorOrLambda resultCallback ) 此函数重载 runJavaScript (). This behavior occurs when the JavaScript is running longer than the QWebEngineView lives. Jul 26, 2017 · It works perfectly fine! Thank you very much. We implement a QMainWindow with a QWebEngineView as a central widget to build up the browser itself. void QWebEnginePage:: runJavaScript (const QString &scriptSource, FunctorOrLambda resultCallback) This function overloads runJavaScript(). void QWebEnginePage:: runJavaScript (const QString &scriptSource, quint32 worldId = 0, const std::function < void (const QVariant &)> &resultCallback = {}) Runs the JavaScript code contained in scriptSource without checking whether the DOM of the page has been constructed. The script will run in the same world as other scripts that are part of the loaded site. I have also done this using std mutex and cond. page(). To run the example from Qt Creator, open the Welcome mode and select the example from Examples. Jul 10, 2024 · 在QWebEnginePage中，每次调用runJavaScript都是在一个独立的上下文中执行的，函数定义不会持久化到全局的作用域中。即，当我们调用了runJavaScript以后，当前的JavaScript脚本只是被执行去了，后续的代码继续执行，当JavaScript执行完成以后，回调函数里的代码再被执行。 Jul 21, 2019 · In your runJavascript function either you emit a signal or you can call a function of the save class and then pass the value in that function. QWebEnginePage ‘s API is very similar to QWebEngineView, as you are still provided with common functions like action() (known as pageAction in QWebEngineView), triggerAction(), and findText(). But I had to spawn new thread because, in fact, thread calling runJavaScript and thread executing callback are the same threads Jul 8, 2024 · #include <QWebEngineView> #include <QWebEnginePage> 2. I need to access to the js variable in my python script to show data. While the DOM of the page can be accessed from any world, JavaScript variables of a function defined in one world are not accessible from a Detailed Description¶. . I'm creating a simple . page()->runJavaScript(js,[this](const QVariant &v) { newFunction(v); Dec 12, 2023 · I have been using QWebEnginePage::runJavaScript(); with this being executed after loading a web page with QWebEnginePage::setUrl(); and calling a slot after QWebEnginPage::loadFinished(); I am running into a few issues. var and blocking queue. Your function needs 2 parameters, although it also works but will signal undefined. To reproduce, execute an endless loop in the JavaScript callback and than delete the QWebEngineView i. Dec 3, 2023 · runJavaScript() 是 Qt WebEngine 框架中的一个函数，用于在 Web 页面上执行 JavaScript 代码。具体来说，runJavaScript() 函数可以在 QWebEngineView 或 QWebEnginePage 对象上调用，以在 Web 页面上执行 JavaScript 代码。它接受一个字符串参数，该字符串是要执行的 JavaScript 代码。 Scripts can be executed on the web page by using runJavaScript(), either in the main JavaScript world, along with the rest of the JavaScript coming from the web contents, or in their own isolated world. In the application, we call QWebEnginePage::runJavaScript() to execute jQuery JavaScript code. Modified 5 years ago. A web engine page holds the contents of an HTML document, the history of navigated links, and actions. Runs the JavaScript code contained in scriptSource. runJavaScript() Ask Question Asked 5 years ago. Aug 30, 2018 · You have 2 errors: You are calling the function when the page has not yet finished loading. Viewed 3k times 3 . lljjfjd hnn jjepz efrd xfxi yyx zkigo tiik zhzr xfby

Qwebenginepage runjavascript. Modified 5 years ago.