QString variable to Javascript: Difference between revisions
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| Line 8: | Line 8: | ||
This is a simple html to test with | This is a simple html to test with | ||
<code> | <code> | ||
<html | <html> | ||
<head | <head> | ||
<script type="text/javascript"> | <script type="text/javascript"> | ||
function displaymessage(str) | function displaymessage(str) | ||
| Line 20: | Line 20: | ||
alert("Hello"); | alert("Hello"); | ||
} | } | ||
</script | </script> | ||
</head | </head> | ||
<body | <body> | ||
<form | <form> | ||
<input type="button" value="Click me!"> | <input type="button" value="Click me!"> | ||
</form | </form> | ||
</body | </body> | ||
</html | </html> | ||
</code> | </code> | ||
Revision as of 17:33, 12 March 2015
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Small snippet showing how to call two javascript functions, one without any param, and one with a QString param…
This is a simple html to test with
<html>
<head>
<script type="text/javascript">
function displaymessage(str)
{
alert(str);
}
function displayhello()
{
alert("Hello");
}
</script>
</head>
<body>
<form>
<input type="button" value="Click me!">
</form>
</body>
</html>
Now using the Designer, load this page to a QWebView in your mainwindow. And in the mainwindow.cpp
QWebFrame *frame = ui->webView->page()->mainFrame();
// the below line will call the javascript function that does not have any param
frame->evaluateJavaScript("displayhello()");
// now this is how to call the javascript function which takes a QString param
QString data("Qt is the Best!"); // can be some large data, say from a file
QString param = QString("displaymessage('%1')").arg(data); // FIXME: Does not work if "data" contains a quote character!
frame->evaluateJavaScript(param);