QTextEdit::setHtml(): how can I pass a string with an embedded image?

[mattc]

Hello,
is it possibile to pass to setHtml() a string with a self-contained image? I know I can do the following:

QString html;
html.append("<img src=\"c:\\temp\\sample.png\">");
myTextEdit->setHtml(html);

QString html;
html.append("<img src=\"c:\\temp\\sample.png\">");
myTextEdit->setHtml(html);

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and it works. However, I would like to get rid of the external image file (I am generating it at runtime).

My first attempt was to build the html incrementally by repeteadly calling QTextEdit::insertHtml() and QTextEdit::insertImage(), but that messes things up. I guess that's because I am generating the html by recursion (visiting a tree), so the "start" and "end" tags are usually separated by many calls to "insertHtml()", and formatting gets lost in the way.

I also tried to encode the images in the html using some "base64" encoding snippet found on the net, but it doesn't work.

Thanks

Qt 4.5.1, Vista Sp1, VS Express 2008

[mattc]

Ooops, I must be stupid: the base64 approach works fine. I probably messed up something on my first attempt.

[mattc]

No, it doesn't work. It was just a placeholder image displayed by QTextEdit, not the actual image. The question is still open.

[Lykurg]

Years ago I write an article at the wiki. This my be a startpoint for you to integrate images into your QTextEdit. http://wiki.qtcentre.org/index.php?title=QTextBrowser_with_images_and_CSS

P.s.: Don't know if it still works with 4.5...

[mattc]

Thank you Lykurg,
it works pretty well! Here is the working code for future reference:

QString html;
 
QImage img("c:\\temp\\sample.png"); // todo: generate image in memory
myTextEdit->document()->addResource(QTextDocument::ImageResource, QUrl("sample.png" ), img);
 
html.append("<p><img src=\":sample.png\"></p>");
 
myTextEdit->setHtml(html);

QString html;

QImage img("c:\\temp\\sample.png"); // todo: generate image in memory
myTextEdit->document()->addResource(QTextDocument::ImageResource, QUrl("sample.png" ), img);

html.append("<p><img src=\":sample.png\"></p>");

myTextEdit->setHtml(html);

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