Detect Button Press / Release in toolbar

[irish_guy@hotmail.com]

Hi,
I am using a toolbar in an application and it works great for 'normal operations'.

I am having problems because I need to call one function when a button is pressed and another function when a button is released.

I would like it act like a QPushButton with the Pressed and Released signals.

Is this possible?

If so, any ideas / hints would be very much appreciated.

Thanks,
Louis

[stampede]

Install event filter on the button object and wait for QEvent::MouseButtonPress and MouseButtonRelease events.

[anda_skoa]

A QToolButton is a QAbstractButton, it has a QAbstractButton::pressed() and QAbstractButton::released() signal.

Cheers,
_

[irish_guy@hotmail.com]

Hi Guys and thanks for your replies...

I have made some progress with the event filter...

If I do this in mainwindow.cpp

FilterObject FO;

ui->mainToolBar->installEventFilter(&FO);

and then in FilterObject

bool FilterObject::eventFilter(QObject *object, QEvent *event)
{
if (event->type() == QEvent::MouseButtonPress) {
qDebug() << "Mouse Press On Toolbar";
return true;
}

return false;
}

I can detect the mouse press on the toolbar which is great.

However when I try to detect the mouse pressed from a button / action on the toolbar it no longer works

I replace ui->mainToolBar->installEventFilter(&FO); with ui->actionDoWork->installEventFilter(&FO);

The action DoWork is a button generated by the Action Editor.

So basically it works to detect mouse events on the toolbar but not from an action button on the toolbar.

What I really need is to read the mouse events from the buttons on the toolbar.

Again, thanks and any ideas / hints are welcome.

Regards,
Louis

[anda_skoa]

Why do you use an event filter?
What is the reason you are not using the signals of the button?

Cheers,
_

[irish_guy@hotmail.com]

Thanks Anda,

I used the event filter because I was unable to figure out how to use these signals of the button on a toolbar.

I can use the signals from a normal push button but I can't understand how to get the same signals from the toolbar buttons.

Is there any example of using the QAbstractButton in this way or a similar way?

I am new to this so sorry if it is obvious....

Thanks Again,
Louis

[anda_skoa]

I can use the signals from a normal push button but I can't understand how to get the same signals from the toolbar buttons.

There is no difference. The signal/slot mechanism works the same way for all QObject subclasses

With SIGNAL/SLOT macros:

connect(pointerToToolButton, SIGNAL(pressed()), pointerToReceiver, SLOT(someSlotNameHandlingPress()));

connect(pointerToToolButton, SIGNAL(pressed()), pointerToReceiver, SLOT(someSlotNameHandlingPress()));

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The circumstance that the button is on a toolbar doesn't change anything, connect() doesn't even care that the sender is a QWidget derived class.

Cheers,
_

[irish_guy@hotmail.com]

Thanks again & Almost there I think...

When I try to connect the signals and slots... I get a run time message that there is No such Signal QAction:ressed()

connect(ui->actionZoom_In, SIGNAL(pressed()), this, SLOT(MousePress()));

QObject::connect: No such signal QAction:ressed() in ../CameraControlGUI/mainwindow.cpp:66
QObject::connect: (sender name: 'actionZoom_In')
QObject::connect: (receiver name: 'MainWindow')

When I connect to the 'triggered signal'

connect(ui->actionZoom_In, SIGNAL(triggered()), this, SLOT(MousePress()));

it works fine but I really need pressed and released...

Regards
Louis

[anda_skoa]

Ah, yes, I should have written QToolButton, not QAction.

Oh, wait, I did.

Cheers,
_