Qt Assistant and mouseover

[Perdrix]

Does Qt Assistant support html like:

    You can see an example of a star mask on the right.<br>
    Mouse over the text to see <b><A onmouseover="document['STARMASK01'].src='../images/StarMask_Stars.jpg';document.getElementById('STARMASK01TEXT').innerHTML='Star Field';" href="javascript:void(0);">
    the image</A></b> or <b><A onmouseover="document['STARMASK01'].src='../images/StarMask_Mask.jpg';document.getElementById('STARMASK01TEXT').innerHTML='Star Mask';" href="javascript:void(0);">the star mask</A></b> 

to select different images for display based on mouse location?

Thanks
David

[jeremy_k]

It looks like Assistant's display is implemented via QTextBrowser, which makes no mention of javascript or QJSEngine in the documentation. As such, embedded javascript won't work.

An application could use QTextBrowser::highlighted() to detect the mouseover and alter the underlying document as desired.

[Perdrix]

Well that's a great shame, as the help for my application is Windows .chm format, and it makes quite a bit of use of mouseover.

[Perdrix]

Is anyone able to provide a definitive answer? I think QtWebKit does support javascript, and the file that I was pointed to seems to suggest the Assistant might use that ...

Thanks, David

[Christian Ehrlicher]

I know it's hard for a programmer but simply look at the code...

https://code.qt.io/cgit/qt/qttools.git/tree/src/assistant/CMakeLists.txt
It does not link against QtWebKit (which would be very surprising as this is dead since ages) but qlighthtml which is a wrapper around http://www.litehtml.com/

[Gilboonet]

@Christian-Ehrlicher said in Qt Assistant and mouseover:

I know it's hard for a programmer but simply look at the code...

https://code.qt.io/cgit/qt/qttools.git/tree/src/assistant/CMakeLists.txt
It does not link against QtWebKit (which would be very surprising as this is dead since ages) but qlighthtml which is a wrapper around http://www.litehtml.com/

If it was possible, I would downvote such a post that doesn't give any definitive nor at least helpful answer but a very subjective sarcastic view.

[Christian Ehrlicher]

Now tell me what's wrong with my answer?

No, Qt Assistant does not use QtWebkit which was deprecated already 6 years ago, it uses litehtml. The features of litehtml are shown on http://www.litehtml.com/ - if you find something about javascript events there, let me know.
And if you don't trust the sources, simply try it out. You would have known it already then...

[Perdrix]

In answer to the question - there's only so many hours in the day - often it is just quicker to ask than to to go digging in the source code (or to set up a test case).

[Perdrix]

Now if QTextBrowser were based on QtWebEngine (well I can dream can't I).