How to prevent QTextBrowser/QTextDocument from blocking?

[Berryblue031]

I am using QTextBrowser to display some large html pages.

Before I show the data, I spawn a little QMovie loading indicator, and then I call

class ResultBrowser : public QTextBrowser
{
 
void showcontent(const QString& s);
QTextDocument mTextDocument;
 
};
 
void ResultBrowser::showcontent(const QString& s)
{
  //I use a QTextDocument for my stylesheet
  mTextDocument->setHtml(s);
  setDocument(mTextDocument);
}

class ResultBrowser : public QTextBrowser
{

void showcontent(const QString& s);
QTextDocument mTextDocument;
 
};

void ResultBrowser::showcontent(const QString& s)
{
  //I use a QTextDocument for my stylesheet
  mTextDocument->setHtml(s);
  setDocument(mTextDocument);
}

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Sadly this causes some blocking which causes the loading indicator to pause. I attempted to call my showcontent function through QtConcurrent::run, but it crashes due to events being triggered from the wrong thread.

Suggestions?

[Berryblue031]

Well looking back at some other threads on a similar issue I decided to use a timer to insert the text in ~100 character chunks.

This fixes the performance issue *yay*

but sadly the html is not rendered properly when passed in with chunks like this, for example list items <li> don't display on their own lines

void ResultBrowser::loadContent()
{
	if(!mContent.isEmpty() && mCurrentIndex < mContent.size())
	{
		if(!mTextCursor)
		{
			mTextCursor = new QTextCursor(&mDocument);
		}
 
		//No splitting tags
		int size = mChunkSize;
		int index = mContent.indexOf("<", mCurrentIndex + mChunkSize);
		if(index > 0)
		{
			size = index - mCurrentIndex;
		}
 
		QString tmp = mContent.mid(mCurrentIndex, size);
 
		mTextCursor->insertHtml(tmp);
		mCurrentIndex += size; 
	}
	else
	{
		mLoadTimer->stop();
	}
}

void ResultBrowser::loadContent()
{
	if(!mContent.isEmpty() && mCurrentIndex < mContent.size())
	{
		if(!mTextCursor)
		{
			mTextCursor = new QTextCursor(&mDocument);
		}

		//No splitting tags
		int size = mChunkSize;
		int index = mContent.indexOf("<", mCurrentIndex + mChunkSize);
		if(index > 0)
		{
			size = index - mCurrentIndex;
		}

		QString tmp = mContent.mid(mCurrentIndex, size);

		mTextCursor->insertHtml(tmp);
		mCurrentIndex += size; 
	}
	else
	{
		mLoadTimer->stop();
	}
}

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Is the display issue something that can be overcome? or is this a flawed tactic all together?