Qcombobox

[arturs]

Hi

I have QCombox without items. After clicking on the combobox I would like to showmessage but I cannot find slot "Clicked" or something similar.

How to do it ?

Regards
Artur

[wysota]

There is no such signal. If you want to have one, subclass, reimplement mouse events and emit such signal yourself.

[chris.kzn]

... in short, add a pushButton, eish, that is just mean - lol.

[Radek]

No. Do as Wysota has said. The mouse event will hook clicking the combo box and emit a "clicked" signal - perhaps only sometimes (when the combo box is empty). If the combo box isn't empty, you get a signal from the clicked item.

[arturs]

If it is not problem please give me an example.

Thank you for help

[wysota]

If it is not problem please give me an example.

An example of what?

[arturs]

How to do it using QMouseEvent.
How to determine that the left button of mouse was clicked on the Combobox.

[wysota]

How to do it using QMouseEvent.
How to determine that the left button of mouse was clicked on the Combobox.

void Combo::mousePressEvent(QMouseEvent *e) {
  if(e->button() == Qt::LeftMouseButton) emit clicked();
}

void Combo::mousePressEvent(QMouseEvent *e) {
  if(e->button() == Qt::LeftMouseButton) emit clicked();
}

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[arturs]

My Code

void Test::mouseMoveEvent(QMouseEvent *event)
{
    if (event->button()==Qt::LeftButton) emit clicked();
 
}

void Test::mouseMoveEvent(QMouseEvent *event)
{
    if (event->button()==Qt::LeftButton) emit clicked();

}

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Should I create clicked signal ? because Now I have the following error: 'clicked' was not declared in this scope

[wysota]

Should I create clicked signal ?

If you want to emit a signal, the signal has to exist. So yes, you need to declare the signal in your class.

[arturs]

but It is still not clear for me. The signal will be sent each time when the left button of mouse is clicked even if the pointer of mouse there is out of Combobox area.

Second question:
Is it possible to check using a method if a slot was called by signal or was called another method

for example:


I have a slot

void Test:: test1 (void) {
 
qDebug () << "TEST";
}

void Test:: test1 (void) {

qDebug () << "TEST";
}

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I can call it using the following code:
test();

or it can be called by signal.

I would like to know which method was used to call the slot.