QString variable to Javascript: Difference between revisions
Jump to navigation
Jump to search
AutoSpider (talk | contribs) (Decode HTML entity names) |
(Cleanup) |
||
| Line 1: | Line 1: | ||
{{ | {{LangSwitch}} | ||
[[Category:snippets]] | [[Category:snippets]] | ||
[[Category:Developing_with_Qt::QtWebKit]] | [[Category:Developing_with_Qt::QtWebKit]] | ||
Small snippet showing how to call two javascript functions, one without any param, and one with a QString param… | Small snippet showing how to call two javascript functions, one without any param, and one with a QString param… | ||
| Line 11: | Line 9: | ||
<head> | <head> | ||
<script type="text/javascript"> | <script type="text/javascript"> | ||
function displaymessage(str) | function displaymessage(str) | ||
{ | { | ||
alert(str); | |||
} | } | ||
function displayhello() | function displayhello() | ||
{ | { | ||
alert("Hello"); | |||
} | } | ||
</script> | </script> | ||
</head> | </head> | ||
<body> | <body> | ||
<form> | |||
<input type="button" value="Click me!"> | |||
</form> | |||
</body> | </body> | ||
</html> | </html> | ||
</code> | </code> | ||
Now using the Designer, load this page to a QWebView in your mainwindow. And in the mainwindow.cpp | Now using the Designer, load this page to a {{DocLink|QWebView}} in your mainwindow. And in the mainwindow.cpp | ||
<code> | <code> | ||
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 | // 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! | QString param = QString("displaymessage('%1')").arg(data); // FIXME: Does not work if "data" contains a quote character! | ||
frame->evaluateJavaScript(param); | |||
</code> | </code> | ||
Revision as of 22:21, 28 June 2015
En Ar Bg De El Es Fa Fi Fr Hi Hu It Ja Kn Ko Ms Nl Pl Pt Ru Sq Th Tr Uk Zh
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);