QToolbar first item not clickable?

[medvedm]

Very very weird issue. I've got code for a GUI I'm working on, and whatever action I add as the first item in the QToolbar is not clickable like usual.

So, when I do this:

@
//----- Set up the top toolbar
QToolBar* pToolBar = addToolBar("Connections");
pToolBar->setObjectName("ConnectionBar");

_pConnectAction = pToolBar->addAction("Connect");

connect(_pConnectAction, SIGNAL(triggered()),
this, SLOT(connectToServer()));
@

I get a QAction, which I cannot click, like this:

!http://i.imgur.com/yhk87Lq.png()!

When I add another QAction in front, like this:

@
QToolBar* pToolBar = addToolBar("Connections");
pToolBar->setObjectName("ConnectionBar");

pToolBar->addAction("foo you");

_pConnectAction = pToolBar->addAction("Connect");

connect(_pConnectAction, SIGNAL(triggered()),
this, SLOT(connectToServer()));
@

I get this (notice that now Connect is clickable)

!http://i.imgur.com/AHNyhax.png()!

This is running in a QMainWindow subclass constructor.

What have I done wrong?

[medvedm]

also, not sure why the images didn't just come inline.

[Guigui]

Why are you passing a string parameter to the addAction method? The method has the following signature:

void addAction(QAction *action);

You should create an action first, then add it to a toolbar. Try something like this:

@
QAction *deleteAction = new QAction(QIcon(":/images/delete.png"), tr("&Delete"), this);
deleteAction->setShortcut(tr("Delete"));
deleteAction->setStatusTip(tr("Delete item from diagram"));
connect(deleteAction, SIGNAL(triggered()), this, SLOT(deleteItem()));

 QToolBar *editToolBar = addToolBar(tr("Edit"));
 editToolBar->addAction(deleteAction);

@

[medvedm]

Um, there is an overloaded version of addAction that makes the QAction for you?

http://qt-project.org/doc/qt-4.8/qtoolbar.html#addAction-2

Shouldn't have to make it first, then add it. The overload should work fine, and in fact does so for the second item.

[Guigui]

Yep, you're right. Haven't seen it, sorry about that.

This is strange indeed. Which version are you using? I just ran this simple test and it worked perfectly, with Qt 5.0.1 on Linux.

@
class MainWindow : public QMainWindow
{
Q_OBJECT

public:
MainWindow(QWidget *parent = 0);
virtual ~MainWindow();

(...)

private slots:
void testPrintRun();
void testPrintStop();

private:
void createToolBars();

QToolBar *toolbar;
QAction *run;
QAction *stop;
(...)

};

(...)

void MainWindow::createToolBars()
{
toolBar = addToolBar(tr("Run toolbar"));
toolBar->setObjectName("run_toolbar");

run = toolBar->addAction("runAct");
stop = toolBar->addAction("stopAct");

connect(run, SIGNAL(triggered()),
        this, SLOT(testPrintRun()));

connect(stop, SIGNAL(triggered()),
        this, SLOT(testPrintStop()));

}

void MainWindow::testPrintRun()
{
std::cout << "Run action clicked" << std::endl;
}

void MainWindow::testPrintStop()
{
std::cout << "Stop action clicked" << std::endl;
}

@

[medvedm]

I'm on Qt 4.8.3 on Ubuntu 12.10. I'll have to find a few minutes to run that code.