Qt - loading htm file from resources

Question

I've problem with open local html file in QWebView widget. So, I do it like this:

QWebView *myWebView = new QWebView;    
myWebView->load(QUrl("qrc:/index.htm"));

Sure, I have added index.htm in resources. But in QWebView there is white screen. I tried to open local file with Firefox, it's allright.

What should I do to fix it?

PS: htm-page uses js and css files, but I've also added them to resources too. PSS: Also, I tried to do it such way:

QFile res(":/index.htm");
res.open(QIODevice::ReadOnly|QIODevice::Text);
myWebView->setHtml(res.readAll());

but it doesn't help.

score 1 · Answer 1 · answered Mar 09 '13 at 15:52

1

I would first try this:

connect(myWebView, SIGNAL(loadFinished(bool)), this, SLOT(finishedLoad(bool)));
....
void finishedLoad(bool ok){
    qDebug() << ok;
}

Then you will know if the web view is encountering an error while loading. The error could be due to improperly formatted html, etc.

Another method would be to load the contents of the resource into a string, then:

myWebView->setHtml(stringFromResource);

answered Mar 09 '13 at 15:52

buster

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hmm, it returns 'false'. ok, I tried to use sethtml, now it returns 'true' but there is white screen again – Russell Crowe Mar 09 '13 at 16:14

hyde · Accepted Answer · 2019-04-03T04:26:12.967

1

Have you tried just loading the file to QByteArray to verify it loads correctly?

Edit:

Something like (untested, but you get the idea):

QFile file(":/index.htm");
if(file.open(QIODevice::ReadOnly)) {
    QByteArray dump = file.readAll();
    qDebug() << "contents: " << dump;
} else {
    qDebug() << "error: " << file.error();
}

The error() method returns QFile::FileError enum.

edited Apr 03 '19 at 04:26

answered Mar 09 '13 at 16:02

hyde

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May you explain more detail about QByteArray? Yes, I'm sure, there is only "/" prefix – Russell Crowe Mar 09 '13 at 16:22
it prints only `""` What does it mean? – Russell Crowe Mar 09 '13 at 17:34
It means QFile could not access the file in resources either, or alternatively file is empty. So problem has nothing to do with QWebView, it's a resource problem. – hyde Mar 09 '13 at 18:03
thanks, hyde, you are right, problem was with file. Now it's solved. – Russell Crowe Mar 09 '13 at 19:03
This wont work unless you also open the file for reading: ```file.open(QIODevice::ReadOnly);``` – aatwo Apr 02 '19 at 21:03
@aatwo Yeah, of course, thanks! Fixed (still untested). – hyde Apr 03 '19 at 04:26

score 1 · Answer 3 · answered Mar 09 '13 at 19:03

Your problem is in using resource file. Here is some advice's:

Is your file really located on drive?
Have you saved your resource file before build? Try to save all and do clean-build.
First of all check (and if needed, show) your .qrc-file (it is xml-like text file), is it correct? Have you added prefix (<qresource prefix="/">) and so on
Try to use aliases like <file alias="cut-img.png">images/cut.png</file> and your file is then accessible as :/cut-img.png from the application.

Of course, don't forget to check documentation -- http://qt-project.org/doc/qt-4.8/resources.html

Good luck!

Qt - loading htm file from resources

3 Answers3