Capture DoubleClick on QTabBar

[cerr]

The class is declared as follows:

class SessionStack : public QTabWidget

How would I get the tab object using the index?

[mrjj]

@cerr
hi
Use this function to get the tab
http://doc.qt.io/qt-4.8/qtabwidget.html#widget

Can you show me how you define
tabBarDoubleClicked ?

[cerr]

@mrjj said in Capture DoubleClick on QTabBar:

@cerr
hi
Use this function to get the tab
http://doc.qt.io/qt-4.8/qtabwidget.html#widget

Can you show me how you define
tabBarDoubleClicked ?

I hadn't defined it at all but noew added it under

signals:
    void tabBarDoubleClicked(int index);

which still doesn't seem to be right, I now refer to it like:
```
connect(QTabWidget::widget(tabIndex), SIGNAL(&QTabBar::tabBarDoubleClicked(sessionId)),
this, SLOT(SessionStack::editTabLabel(sessionId)));

and get this in the shell:

No such signal Splitter::&QTabBar::tabBarDoubleClicked(sessionId)

How do I make it link to the correct function/signal? :o

[cerr]

@mrjj said in Capture DoubleClick on QTabBar:

@cerr
hi
Use this function to get the tab
http://doc.qt.io/qt-4.8/qtabwidget.html#widget

Can you show me how you define
tabBarDoubleClicked ?

I hadn't defined it at all but noew added it under

signals:
    void tabBarDoubleClicked(int index);

which still doesn't seem to be right, I now refer to it like:

connect(QTabWidget::widget(tabIndex), SIGNAL(&QTabBar::tabBarDoubleClicked(sessionId)),
  this, SLOT(SessionStack::editTabLabel(sessionId)));

and get this in the shell:

No such signal Splitter::&QTabBar::tabBarDoubleClicked(sessionId)

How do I get rid of Splitter:: and make it link to the correct function/signal? :o

[mrjj]

Hi
First of all the signal:
signals:
void tabBarDoubleClicked(int index);

In which class did you put it?
You seems to say its the Tab. Is this correct? The signal is defined in Tab class ?

Also, the syntax seems off. You are mixing syntaxes again.

connect(QTabWidget::widget(tabIndex), SIGNAL(&QTabBar::tabBarDoubleClicked(sessionId)),
this, SLOT(SessionStack::editTabLabel(sessionId)));

try
with
QWidget *TheTab= ui->THEQTabWidget->widget(tabIndex);
qDebug() << " con :" connect( TheTab , SIGNAL(tabBarDoubleClicked(sessionId) ), this, SLOT(editTabLabel(sessionId) );

it should say "con : true "

[cerr]

@mrjj
I now have:

QWidget *tabWidget = QTabWidget::widget(tabIndex);
    connect(tabWidget, SIGNAL(tabBarDoubleClicked(sessionId)),this, SLOT(SessionStack::editTabLabel(sessionId)));

where

signals:	
 void tabBarDoubleClicked(int index);

is declared in

class SessionStack : public QTabWidget

but I get this on the shell:

QObject::connect: No such signal Splitter::tabBarDoubleClicked(sessionId)

I don't exacltly understand where it gets the reference to Splitter:: from. There is a class that looks like:

class Session;

class Splitter: public QSplitter
{
    Q_OBJECT

    public:
        explicit Splitter(Qt::Orientation orientation, Session* session, QWidget* parent);
        ~Splitter();
        Session* session();

        void recursiveCleanup();
    private:
        Session *m_session;
};

but QSplitter has no DoubleClicked signal.

[mrjj]

Hi
Clean the build folder and run qmake again

seems it remembers the bad syntax where you used
&Splitter::tabBarDoubleClicked(sessionId)

[mrjj]

Also something else:

you say:
signals:
void tabBarDoubleClicked(int index);
is declared in class SessionStack : public QTabWidget

but when you connect to say its in the tabWidget

QWidget *tabWidget = QTabWidget::widget(tabIndex);
connect(tabWidget, SIGNAL(tabBarDoubleClicked(sessionId)),this, SLOT(SessionStack::editTabLabel(sessionId)));

here u say that tabWidget has the signal. Which seems NOT correct?

and please stop using SessionStack:: with SLOT macro.
Might still work, but NOT correct.

• SLOT(editTabLabel(sessionId)));

[cerr]

@mrjj

I deleted all files within build/, re-ran cmake and recompiled but still get:
QObject::connect: No such signal Splitter::tabBarDoubleClicked(sessionId)

I have now removed the declaration for tabBarDoubleClicked from class SessionStack - do I need it there? As it should come directly from QTabWidget, should it not?

[SGaist]

Hi,

Because Splitter::tabBarDoubleClicked(sessionId) is wrong. You don't pass a variable to the connect statement, you pass the parameter type.

[mrjj]

@SGaist
Good catch :)

it should be
connect(this, SIGNAL(tabBarDoubleClicked(int)),this, SLOT(editTabLabel(int)));

• I have now removed the declaration for tabBarDoubleClicked from class SessionStack - do I need it there? As it should come directly from QTabWidget, should it not?

I went and looked at doc for TabBar.
http://doc.qt.io/qt-5/qtabbar.html#tabBarDoubleClicked
It is indeed the bar that sends the db click.
i thought it was a custom signal. sorry about that.
So it is pretty simple
(inside SessionStack )
qDebug() << "con:" << connect(this, SIGNAL(tabBarDoubleClicked(int)),this, SLOT(editTabLabel(int)));

that should do it. Check it says true.

[cerr]

@mrjj
Oh yeah! Wow, cool!
Thank you for helping the newbie!!! Much appreciated!