Qt QWEBview JavaScript回调 [英] Qt QWEBview JavaScript callback
问题描述
如何将函数指针从JavaScript传递到插槽？
How to pass a function "pointer" from JavaScript to a slot?
在JavaScript中：
in JavaScript:
function f1()
{
alert("f1");
}
qtclass.submit(f1);
和Qt：
public slots:
void submit(void * ptr)
{
(void)ptr;
}
我需要f1函数来解决JavaScript中的问题c ++，一旦完成一些处理。另外我事先并不知道函数指针的名称。
I need the "f1", function to get fired in the JavaScript from the c++, once some processing is done. Also I do not know in advance the name of the function pointer.
推荐答案
你应该能够使用
you should be able to execute your script using QWebFrame::evaluateJavaScript method. See if an example below would work for you:
初始化webview：
initializing webview:
QWebView *view = new QWebView(this->centralWidget());
view->load(QUrl("file:///home//test.html"));
connect(view, SIGNAL(loadFinished(bool)), this, SLOT(loadFinished(bool)));
loadFinished信号处理程序：
loadFinished signal handler:
void MyTestWindow::loadFinished(bool)
{
QVariant f1result = ((QWebView*)sender())->page()->mainFrame()->evaluateJavaScript("f1('test param')");
qDebug() << f1result.toString();
}
test.html：
test.html:
<head>
<script LANGUAGE="JavaScript">
function f1 (s)
{
alert (s)
return "f1 result"
}
</script>
</head>
<body>
test html
</body>
evaluateJavaScript 应触发警告消息框并返回带有f1函数结果的QVariant 。
evaluateJavaScript should trigger an alert message box and return QVariant with f1 function result.
希望这有帮助，尊重
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