QLabel - mouseReleaseEvent to parent - HTML label

antonlindgren

Hi,

I have a subclass of QDialog (called CDialog) that has a member of type: QLabel m_Text;

CDialog has mouseReleaseEvent() where it detects if the user right or left clicks the dialog.

My QLabel has this set:

this->m_Text.setText("This is a sample text");

If I do:


this->m_Text.setTextFormat(Qt::PlainText);

Everything works fine. If I click on the text, it still relays the signal to the parent (so I catch the event).

But if I do:

this->m_Text.setTextFormat(Qt::RichText);

The signal never gets relayed up to the parent. Somehow, if it's HTML, the QLabel catches the signal and blocks it. I can still press under/above the text string, and my CDialog will get the signal.
I'm guessins this is because it scans for <a>-tags?

I've tried:

this->m_Text.setOpenExternalLinks(false);

But that did little to nothing (saw it on another forum).

So, how can I tell QLabel to always send the signal upwards - even if it's RichText?

Thanks in advance.

Best regards,
Anton

JordanHarris

I really have no idea about this, but you might be able to accomplish this by inheriting QLabel and reimplementing mouseReleaseEvent. Some thoughts are to possibly use QMouseEvent::ignore(), QCoreApplication::sendEvent(), or QCoreApplication::postEvent(). As I said, I don't really know; It's just a thought.

antonlindgren

Hi JordanHarris,

Thanks for your response!

I thought so too - but I really want to avoid making yet another subclass, I was hoping that there would be some sort of flag or setting that I've missed that could essentially solve this.

But if there is none, then I'll have to make a new class inheriting it.

Thanks for your thoughts, though :)

Best regards,
Anton

mrjj

Hi
I tried a default project with a dialog and a label using rich text.

I could not get it to steal the clicks.
Dialog always got the click.

So I wonder, besides setting
setTextFormat(Qt::RichText);

do you do anything else to make this happen?

antonlindgren

Hi @mrjj

Thank you for taking time and checking this.

That is weird indeed. This is how I setup my dialog (this being my CDialog : public QDialog)

		QString message = "This is a sample text";
		this->setModal(false);
		this->setWindowFlags(Qt::FramelessWindowHint|Qt::SplashScreen|Qt::WindowStaysOnTopHint);

		m_Text.setObjectName("label_NotificationText");
		m_Text.setStyleSheet("QLabel#label_NotificationText { color: #DDDDDD; }");
		m_Text.setWordWrap(true);
		m_Text.setText(message);
		m_Text.setParent(this);
		//m_Text.setTextFormat(Qt::RichText);

Then I have this function to capture the clicks:

void mouseReleaseEvent ( QMouseEvent * event ) {
	if(event->button() == Qt::RightButton) {
		this->deleteLater();
	}
	else if(event->button() == Qt::LeftButton) {
		// Call the function we wanted
		emit onNotificationPressed(this);
		this->deleteLater();
	}
}

Which never gets called if I press the QLabel m_Text (if it's HTML-enabled).

I don't know if this matters, but I show the dialog using ->show();

Best regards,
Anton

mrjj

Super
That helped a lot - I could reproduce it.

You can disable it with
m_Text.setTextInteractionFlags(Qt::NoTextInteraction);

You might need to set some flags if u need copy paste etc.
This completely removes any interaction.

antonlindgren

@mrjj

Wow, super. That actually solved it.

Thank you so much for your response, your time and your help. I really appreciate it.

Thanks.

Best regards,
Anton