[SOLVED] How can a label be linkable not to a website but to a void funtion of the program?

utcenter

You are assigning the MyLabel pointer to a QLabel pointer from the UI, you are not really creating a MyLabel instance in this case. I don't know if that is the cause of the error, but it is the most obvious candidate.

Try creating the label with new as in my example and then add it to the corresponding layout in your UI.

If you want to, you can export MyLabel as a component for designer "by following this example":http://harmattan-dev.nokia.com/docs/library/html/qt4/designer-customwidgetplugin.html.

Leon

Well even if i dont assign it by UI but create it with ur code it's the same error about the emit not beeing declared..

utcenter

In that case I don't know, it works for me, emit is the standard Qt keyword to emit a signal. Do you have the Q_OBJECT macro in the header of MyLabel as in my example?

lgeyer

There is no need to subclass QLabel.

Just set "openExternalLinks":http://qt-project.org/doc/qt-5.0/qtwidgets/qlabel.html#openExternalLinks-prop to false on connect to the "linkActivated":http://qt-project.org/doc/qt-5.0/qtwidgets/qlabel.html#linkActivated signal.
@
ui->label->setOpenExternalLinks(false);
connect(ui->label, SIGNAL(linkActivated(QString)), this, SLOT(label_clicked(QString)));

void MainWindow::label_clicked(const QString &link)
{
if (link == "...") ...
}
@

Leon

[quote author="Lukas Geyer" date="1358770207"]There is no need to subclass QLabel.

Just set "openExternalLinks":http://qt-project.org/doc/qt-5.0/qtwidgets/qlabel.html#openExternalLinks-prop to false on connect to the "linkActivated":http://qt-project.org/doc/qt-5.0/qtwidgets/qlabel.html#linkActivated signal.
@
ui->label->setOpenExternalLinks(false);
connect(ui->label, SIGNAL(linkActivated(QString)), this, SLOT(label_clicked(QString)));

void MainWindow::label_clicked(const QString &link)
{
if (link == "...") ...
}
@[/quote]

and how should the text of the label be?
how will it be clickable(linkable).?

Code_ReaQtor

[quote author="Leon" date="1358781102"]

and how should the text of the label be?
how will it be clickable(linkable).?

[/quote]

The text SHOULD be in "Rich text" , AFAIK.

Leon

[quote author="Code_ReaQtor" date="1358782000"]
[quote author="Leon" date="1358781102"]

and how should the text of the label be?
how will it be clickable(linkable).?

[/quote]

The text SHOULD be in "Rich text" , AFAIK. [/quote]

I know that.. You click change rich text in the designer and there is a button "Insert link".

What should i put there when i want the label_clicked void to be called..?

lgeyer

Whatever you like.

@
ui->label->setText("This is text with a <a href='someLink'>link</a>.");

void MainWindow::label_clicked(const QString &link)
{
if (link == "someLink") ...
}
@

Leon

[quote author="Lukas Geyer" date="1358782837"]Whatever you like.

@
ui->label->setText("This is text with a <a href='someLink'>link</a>.");

void MainWindow::label_clicked(const QString &link)
{
if (link == "someLink") ...
}
@[/quote]

Didn't know that, thanks! :)

Leon

[quote author="utcenter" date="1358720224"]In that case I don't know, it works for me, emit is the standard Qt keyword to emit a signal. Do you have the Q_OBJECT macro in the header of MyLabel as in my example?[/quote]

And by the way, yes i was using
#define QT_NO_KEYWORDS

I just saw it...

lgeyer

You're welcome! ;-)