QPainter::drawText() with word wrap

[zgulser]

Hi,

I have QListView which I display my item's(in the model) specific data on it. If the item's message data is too long I need to resize the drawText rectangle in order to fit the string to the given option rect. I looked at the forum and find some useful code but still having no success. I have still the following case;

sample.jpg

It seems like I couldn't get the text wrapped inside drawText method. Here is my delegate class code. Any help will be greatly appreciated.

void ChatViewListItemDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const
{
    QRect rect = option.rect;
	int textOffset = 5;
	QPalette pal = option.palette;	
	QVariant variant = index.data(Qt::UserRole);
 
	painter->save();	
 
	QString displayName;
	QDateTime dateTime;
	QString dateTimeInString;
	QString messageContent;
	QString direction;
	QString state;
 
	if(variant.canConvert<ChatMessageHistoryItem>())
	{
		ChatMessageHistoryItem item = variant.value<ChatMessageHistoryItem>();
		displayName = ApplicationManager::getInstance()->getAddressBookManager()->findContactName((item.getDisplayName()));
		dateTime = item.getDateTime();
		dateTimeInString = dateTime.toString("dd/MM/yyyy  hh:mm");
		direction = item.getDirection();
		state = item.getState();
		messageContent = qvariant_cast<QString>(index.data(ChatViewListModel::MessageContentRole));
 
		if(item.getDirection().compare(HistoryItem::DIRECTION_INCOMING) == 0)
		{
			painter->setPen(QColor("#034567"));
		}
		else 
		{
			if(ApplicationManager::getInstance()->getAddressBookManager()->getMyContact())
			{
				displayName = ApplicationManager::getInstance()->getAddressBookManager()->getMyContact()->getDisplayName();
			}
			painter->setPen(QColor("#B0171F"));
			//painter->setPen(QColor("#034567"));
		}
	}   
 
	/*
	if(!direction.isNull() &&
			!direction.isEmpty() &&
				direction.compare(HistoryItem::DIRECTION_OUTGOING) == 0)
	{
		painter->fillRect(option.rect, QColor("#F5F7FA"));
	}
	*/
 
    QFont defaultFont = QApplication::font();
    QFont nameFont(defaultFont);
    nameFont.setPixelSize(12);
    nameFont.setBold(true);
	QFontMetrics nameFontFontMetrics(nameFont);
	int textHeightInPixels = nameFontFontMetrics.height();
 
	QFont dateTimeFont = QApplication::font();
    dateTimeFont.setPixelSize(9);
	QFontMetrics dateTimeFontMetrics(dateTimeFont);
	int dateTimeTextWidthInPixels = dateTimeFontMetrics.width(dateTimeInString);	
 
	QRect displayNameRect = nameFontFontMetrics.boundingRect(textOffset, 
															 rect.top() + 5,
															 rect.width() - textOffset - dateTimeTextWidthInPixels - 5 - 10 , 0,
															 Qt::AlignLeft|Qt::AlignTop|Qt::TextWordWrap,
															 displayName);
    painter->setFont(nameFont);
	painter->drawText(displayNameRect, Qt::AlignLeft|Qt::AlignTop|Qt::TextWordWrap, displayName);
 
	painter->setFont(dateTimeFont);
	painter->setPen(QColor(Qt::lightGray));
	painter->drawText(rect.x() + rect.width() - dateTimeTextWidthInPixels - 5, rect.y() + 15, dateTimeInString);
 
	QFont messageFont = QApplication::font();
    messageFont.setPixelSize(11);
	QFontMetrics messageFontMetrics(messageContent);
	int messageTextHeightInPixels = messageFontMetrics.height();
 
	QRect messageContentRect = messageFontMetrics.boundingRect(textOffset, 
															   rect.top() + textHeightInPixels + 8,
															   rect.width() - textOffset - dateTimeTextWidthInPixels - 5 - 10 , 0,
															   Qt::AlignLeft|Qt::AlignTop|Qt::TextWordWrap,
															   messageContent);
    painter->setFont(messageFont);
	painter->setPen(QColor("#363636"));
	painter->drawText(messageContentRect, Qt::AlignLeft|Qt::AlignTop|Qt::TextWordWrap, messageContent);
 
	QIcon icon = qvariant_cast<QIcon>(index.data(Qt::DecorationRole));
	QPixmap pixmapDeliveryStatus = icon.pixmap(12, 12);
 
	if(!direction.isNull() &&
			!direction.isEmpty() &&
				direction.compare(HistoryItem::DIRECTION_OUTGOING) == 0)
	{
		if(state.compare(HistoryItem::STATE_SENT, Qt::CaseInsensitive) == 0)
		{
			pixmapDeliveryStatus = icon.pixmap(14, 14);
		}
 
		painter->drawPixmap(rect.x() +rect.width() - pixmapDeliveryStatus.width() - 5, rect.y() + textHeightInPixels + 8 , pixmapDeliveryStatus);
 
		if(state.compare(HistoryItem::STATE_DISPLAYED, Qt::CaseInsensitive) == 0)
		{
			painter->drawPixmap(rect.x() +rect.width() - pixmapDeliveryStatus.width() - 9, rect.y() + textHeightInPixels + 8 , pixmapDeliveryStatus);
		}
	}
 
	painter->setPen(QColor("#E5E5E5"));
	painter->drawLine(textOffset, rect.y() + textHeightInPixels + messageTextHeightInPixels + 10, rect.width() - textOffset, rect.y() + textHeightInPixels + messageTextHeightInPixels + 10);
 
	painter->restore();
}
 
QSize ChatViewListItemDelegate::sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const 
{
	int textOffset = 5;
	QRect rect = option.rect;
	QVariant variant = index.data(Qt::UserRole);
	QString displayName = "";
	QString messageContent = "";
	QString dateTimeInString = ""; 
	if(variant.canConvert<ChatMessageHistoryItem>())
	{
		ChatMessageHistoryItem item = variant.value<ChatMessageHistoryItem>();
		displayName = ApplicationManager::getInstance()->getAddressBookManager()->findContactName((item.getDisplayName()));
		dateTimeInString = item.getDateTime().toString("dd/MM/yyyy  hh:mm");
		messageContent = qvariant_cast<QString>(index.data(ChatViewListModel::MessageContentRole));
	}
 
	QFont dateTimeFont = QApplication::font();
    dateTimeFont.setPixelSize(9);
	QFontMetrics dateTimeFontMetrics(dateTimeFont);
	int dateTimeTextWidthInPixels = dateTimeFontMetrics.width(dateTimeInString);
 
    QFont defaultFont = QApplication::font();
    QFont nameFont(defaultFont);
    nameFont.setPixelSize(12);
    nameFont.setBold(true);
	QFontMetrics nameFontFontMetrics(nameFont);
	int textHeightInPixels = nameFontFontMetrics.height();
 
	int value = rect.width() - textOffset - dateTimeTextWidthInPixels - 5 - 10;
 
	QRect displayNameRect = nameFontFontMetrics.boundingRect(0, 0,
                                  rect.width() - textOffset - dateTimeTextWidthInPixels - 5 - 10, 0,
                                  Qt::AlignLeft|Qt::AlignTop|Qt::TextWordWrap,
                                  displayName);
 
	QFont messageFont = QApplication::font();
    messageFont.setPixelSize(11);
	QFontMetrics messageFontMetrics(messageContent);
	int messageTextHeightInPixels = messageFontMetrics.height();
 
	QRect messageContentRect = messageFontMetrics.boundingRect(0, 0,
								  rect.width() - textOffset - dateTimeTextWidthInPixels - 5 - 10 , 0,
                                  Qt::AlignLeft|Qt::AlignTop|Qt::TextWordWrap,
								  messageContent);
 
	QSize sizeAdjusted(option.rect.width(), displayNameRect.height() + messageContentRect.height());
 
	qDebug() << "total height: " << displayNameRect.height() + messageContentRect.height();
    // Keep the minimum height needed in mind.
	if(sizeAdjusted.height() < ITEM_HEIGHT)
	{
        sizeAdjusted.setHeight(ITEM_HEIGHT);
	}
 
    //QSize orig = QItemDelegate::sizeHint(option, index);	
	//return QSize(orig.width(), ITEM_HEIGHT);
	return sizeAdjusted;
}

void ChatViewListItemDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const
{
    QRect rect = option.rect;
	int textOffset = 5;
	QPalette pal = option.palette;	
	QVariant variant = index.data(Qt::UserRole);

	painter->save();	

	QString displayName;
	QDateTime dateTime;
	QString dateTimeInString;
	QString messageContent;
	QString direction;
	QString state;

	if(variant.canConvert<ChatMessageHistoryItem>())
	{
		ChatMessageHistoryItem item = variant.value<ChatMessageHistoryItem>();
		displayName = ApplicationManager::getInstance()->getAddressBookManager()->findContactName((item.getDisplayName()));
		dateTime = item.getDateTime();
		dateTimeInString = dateTime.toString("dd/MM/yyyy  hh:mm");
		direction = item.getDirection();
		state = item.getState();
		messageContent = qvariant_cast<QString>(index.data(ChatViewListModel::MessageContentRole));

		if(item.getDirection().compare(HistoryItem::DIRECTION_INCOMING) == 0)
		{
			painter->setPen(QColor("#034567"));
		}
		else 
		{
			if(ApplicationManager::getInstance()->getAddressBookManager()->getMyContact())
			{
				displayName = ApplicationManager::getInstance()->getAddressBookManager()->getMyContact()->getDisplayName();
			}
			painter->setPen(QColor("#B0171F"));
			//painter->setPen(QColor("#034567"));
		}
	}   

	/*
	if(!direction.isNull() &&
			!direction.isEmpty() &&
				direction.compare(HistoryItem::DIRECTION_OUTGOING) == 0)
	{
		painter->fillRect(option.rect, QColor("#F5F7FA"));
	}
	*/

    QFont defaultFont = QApplication::font();
    QFont nameFont(defaultFont);
    nameFont.setPixelSize(12);
    nameFont.setBold(true);
	QFontMetrics nameFontFontMetrics(nameFont);
	int textHeightInPixels = nameFontFontMetrics.height();

	QFont dateTimeFont = QApplication::font();
    dateTimeFont.setPixelSize(9);
	QFontMetrics dateTimeFontMetrics(dateTimeFont);
	int dateTimeTextWidthInPixels = dateTimeFontMetrics.width(dateTimeInString);	

	QRect displayNameRect = nameFontFontMetrics.boundingRect(textOffset, 
															 rect.top() + 5,
															 rect.width() - textOffset - dateTimeTextWidthInPixels - 5 - 10 , 0,
															 Qt::AlignLeft|Qt::AlignTop|Qt::TextWordWrap,
															 displayName);
    painter->setFont(nameFont);
	painter->drawText(displayNameRect, Qt::AlignLeft|Qt::AlignTop|Qt::TextWordWrap, displayName);

	painter->setFont(dateTimeFont);
	painter->setPen(QColor(Qt::lightGray));
	painter->drawText(rect.x() + rect.width() - dateTimeTextWidthInPixels - 5, rect.y() + 15, dateTimeInString);

	QFont messageFont = QApplication::font();
    messageFont.setPixelSize(11);
	QFontMetrics messageFontMetrics(messageContent);
	int messageTextHeightInPixels = messageFontMetrics.height();

	QRect messageContentRect = messageFontMetrics.boundingRect(textOffset, 
															   rect.top() + textHeightInPixels + 8,
															   rect.width() - textOffset - dateTimeTextWidthInPixels - 5 - 10 , 0,
															   Qt::AlignLeft|Qt::AlignTop|Qt::TextWordWrap,
															   messageContent);
    painter->setFont(messageFont);
	painter->setPen(QColor("#363636"));
	painter->drawText(messageContentRect, Qt::AlignLeft|Qt::AlignTop|Qt::TextWordWrap, messageContent);

	QIcon icon = qvariant_cast<QIcon>(index.data(Qt::DecorationRole));
	QPixmap pixmapDeliveryStatus = icon.pixmap(12, 12);
	
	if(!direction.isNull() &&
			!direction.isEmpty() &&
				direction.compare(HistoryItem::DIRECTION_OUTGOING) == 0)
	{
		if(state.compare(HistoryItem::STATE_SENT, Qt::CaseInsensitive) == 0)
		{
			pixmapDeliveryStatus = icon.pixmap(14, 14);
		}

		painter->drawPixmap(rect.x() +rect.width() - pixmapDeliveryStatus.width() - 5, rect.y() + textHeightInPixels + 8 , pixmapDeliveryStatus);

		if(state.compare(HistoryItem::STATE_DISPLAYED, Qt::CaseInsensitive) == 0)
		{
			painter->drawPixmap(rect.x() +rect.width() - pixmapDeliveryStatus.width() - 9, rect.y() + textHeightInPixels + 8 , pixmapDeliveryStatus);
		}
	}

	painter->setPen(QColor("#E5E5E5"));
	painter->drawLine(textOffset, rect.y() + textHeightInPixels + messageTextHeightInPixels + 10, rect.width() - textOffset, rect.y() + textHeightInPixels + messageTextHeightInPixels + 10);

	painter->restore();
}

QSize ChatViewListItemDelegate::sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const 
{
	int textOffset = 5;
	QRect rect = option.rect;
	QVariant variant = index.data(Qt::UserRole);
	QString displayName = "";
	QString messageContent = "";
	QString dateTimeInString = ""; 
	if(variant.canConvert<ChatMessageHistoryItem>())
	{
		ChatMessageHistoryItem item = variant.value<ChatMessageHistoryItem>();
		displayName = ApplicationManager::getInstance()->getAddressBookManager()->findContactName((item.getDisplayName()));
		dateTimeInString = item.getDateTime().toString("dd/MM/yyyy  hh:mm");
		messageContent = qvariant_cast<QString>(index.data(ChatViewListModel::MessageContentRole));
	}

	QFont dateTimeFont = QApplication::font();
    dateTimeFont.setPixelSize(9);
	QFontMetrics dateTimeFontMetrics(dateTimeFont);
	int dateTimeTextWidthInPixels = dateTimeFontMetrics.width(dateTimeInString);

    QFont defaultFont = QApplication::font();
    QFont nameFont(defaultFont);
    nameFont.setPixelSize(12);
    nameFont.setBold(true);
	QFontMetrics nameFontFontMetrics(nameFont);
	int textHeightInPixels = nameFontFontMetrics.height();

	int value = rect.width() - textOffset - dateTimeTextWidthInPixels - 5 - 10;

	QRect displayNameRect = nameFontFontMetrics.boundingRect(0, 0,
                                  rect.width() - textOffset - dateTimeTextWidthInPixels - 5 - 10, 0,
                                  Qt::AlignLeft|Qt::AlignTop|Qt::TextWordWrap,
                                  displayName);

	QFont messageFont = QApplication::font();
    messageFont.setPixelSize(11);
	QFontMetrics messageFontMetrics(messageContent);
	int messageTextHeightInPixels = messageFontMetrics.height();

	QRect messageContentRect = messageFontMetrics.boundingRect(0, 0,
								  rect.width() - textOffset - dateTimeTextWidthInPixels - 5 - 10 , 0,
                                  Qt::AlignLeft|Qt::AlignTop|Qt::TextWordWrap,
								  messageContent);

	QSize sizeAdjusted(option.rect.width(), displayNameRect.height() + messageContentRect.height());
 
	qDebug() << "total height: " << displayNameRect.height() + messageContentRect.height();
    // Keep the minimum height needed in mind.
	if(sizeAdjusted.height() < ITEM_HEIGHT)
	{
        sizeAdjusted.setHeight(ITEM_HEIGHT);
	}

    //QSize orig = QItemDelegate::sizeHint(option, index);	
	//return QSize(orig.width(), ITEM_HEIGHT);
	return sizeAdjusted;
}

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