QTextBrowser height adjusted to content

[michalk]

I have a class DetailsView derived from QScrollArea. The class member iDescBox which is of type QGroupBox contains QTextBrowser iDescription item within it.

I wolud like to adjust height of iDescBox according to content of iDescription because I don't want to have vertical scrollbar in iDescBox.

I have created method adjustDescription which is called from showEvent and resizeEvent of DetailsView, unfortunately it does not do what I wanted it to do.

When I enter(make visible) DetailsView for the first time I can see vertical scrollbar in iDescBox. When I enter DetailsView second time iDescBox is adjusted correctly and when I enter DetailsView for the third time it has a horizontal scrollbar. After this secuence repeats

Can anybody tell me what am I doing wrong, I attach source of adjustDescription method ?

void DetailsView::adjustDescription()
{
    if (iDescBox->isVisible())
    {
	QMargins margs = iDescBox->contentsMargins();
	int w = viewport()->width()
		- margs.left() - margs.right();
 
	QTextDocument* doc = iDescription->document();
	doc->setTextWidth(w);
	doc->adjustSize();
 
	int h = doc->size().toSize().height()
		+ margs.bottom() + margs.top() + 27;
 
	//If adjusted document size is bigger then viewport size and vertical
	//scrollbar is not displayed then adjust description one more time
	if ( iDescBox->y() + h > viewport()->height()
	    && !verticalScrollBar()->isVisible())
	{
	    w -= verticalScrollBar()->width();
 
	    doc->setTextWidth(w);
	    doc->adjustSize();
 
	    h = doc->size().toSize().height()
			    + margs.bottom() + margs.top() + 27;
	}
 
	iDescBox->setMinimumHeight(h);
	iDescBox->setMaximumHeight(h);
    }
 
}

void DetailsView::adjustDescription()
{
    if (iDescBox->isVisible())
    {
	QMargins margs = iDescBox->contentsMargins();
	int w = viewport()->width()
		- margs.left() - margs.right();
	
	QTextDocument* doc = iDescription->document();
	doc->setTextWidth(w);
	doc->adjustSize();

	int h = doc->size().toSize().height()
		+ margs.bottom() + margs.top() + 27;

	//If adjusted document size is bigger then viewport size and vertical
	//scrollbar is not displayed then adjust description one more time
	if ( iDescBox->y() + h > viewport()->height()
	    && !verticalScrollBar()->isVisible())
	{
	    w -= verticalScrollBar()->width();

	    doc->setTextWidth(w);
	    doc->adjustSize();

	    h = doc->size().toSize().height()
			    + margs.bottom() + margs.top() + 27;
	}

	iDescBox->setMinimumHeight(h);
	iDescBox->setMaximumHeight(h);
    }

}

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[michalk]

Hmm... Method presented above wasn't best way to solve described problem...

Below I present working adjustDescription method:

void DetailsView::adjustDescription()
{
    if (iDescBox->isVisible())
    {
	QMargins margs = iDescBox->layout()->contentsMargins();
	QMargins amargs = widget()->layout()->contentsMargins();
	QTextDocument* doc = iDescription->document();
 
	qreal lineWidth = viewport()->width()
			  - margs.left() - margs.right() - amargs.right()
			  - amargs.left() - doc->documentMargin()*2;
 
	doc->setPageSize(QSizeF(lineWidth,-1));
	int boxHeight = doc->documentLayout()->documentSize().toSize().height()
			+ margs.bottom() + margs.top() + 50 + 4;
 
	if ( iDescBox->y() + boxHeight > viewport()->height()
	    && !verticalScrollBar()->isVisible())
	{
	    lineWidth -= verticalScrollBar()->width();
	    doc->setPageSize(QSizeF(lineWidth,-1));
	}
 
	int newHeight = doc->documentLayout()->documentSize().toSize().height();
	boxHeight = newHeight + margs.bottom() + margs.top() + 50 + 4;
 
	iDescription->viewport()->setMinimumSize(lineWidth,newHeight);
	iDescription->viewport()->setMaximumSize(lineWidth,newHeight);
 
	iDescription->setMinimumSize(lineWidth, newHeight);
	iDescription->setMaximumSize(lineWidth, newHeight);
 
	iDescBox->setMinimumSize(lineWidth + doc->documentMargin()*2,
				     boxHeight);
	iDescBox->setMaximumSize(lineWidth + doc->documentMargin()*2,
				     boxHeight);
    }
}

void DetailsView::adjustDescription()
{
    if (iDescBox->isVisible())
    {
	QMargins margs = iDescBox->layout()->contentsMargins();
	QMargins amargs = widget()->layout()->contentsMargins();
	QTextDocument* doc = iDescription->document();

	qreal lineWidth = viewport()->width()
			  - margs.left() - margs.right() - amargs.right()
			  - amargs.left() - doc->documentMargin()*2;

	doc->setPageSize(QSizeF(lineWidth,-1));
	int boxHeight = doc->documentLayout()->documentSize().toSize().height()
			+ margs.bottom() + margs.top() + 50 + 4;

	if ( iDescBox->y() + boxHeight > viewport()->height()
	    && !verticalScrollBar()->isVisible())
	{
	    lineWidth -= verticalScrollBar()->width();
	    doc->setPageSize(QSizeF(lineWidth,-1));
	}

	int newHeight = doc->documentLayout()->documentSize().toSize().height();
	boxHeight = newHeight + margs.bottom() + margs.top() + 50 + 4;

	iDescription->viewport()->setMinimumSize(lineWidth,newHeight);
	iDescription->viewport()->setMaximumSize(lineWidth,newHeight);

	iDescription->setMinimumSize(lineWidth, newHeight);
	iDescription->setMaximumSize(lineWidth, newHeight);

	iDescBox->setMinimumSize(lineWidth + doc->documentMargin()*2,
				     boxHeight);
	iDescBox->setMaximumSize(lineWidth + doc->documentMargin()*2,
				     boxHeight);
    }
}

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