Qt-interest Archive, December 2006
[Qt4.1.5] QMenu::addAction QAction
Message 1 in thread
Hi all,
QAction* QMenu::addAction ( const QString& text, const QObject*
receiver, const char* member, const QKeySequence& shortcut = 0 )
in Qt4.1.2 I could add a menu entry like this and everything worked fine:
QAction *a= menu->addAction( "test", this, SLOT( doSomething(bool) ) );
with Qt4.1.5 (I have not tested the versions inbetween) I get the
following warning while running my application:
QObject::connect: Incompatible sender/receiver arguments
QAction::triggered() -> MainWindow::doSomething(bool)
One option to get it working again is:
QAction *a= menu->addAction( "test" );
connect( a, SIGNAL( triggered(bool) ), this, SLOT( doSomething(bool) ));
Anyways, I wonder if this was a bug in Qt4.1.2 or if it is a bug in Qt4.1.5.
Cheers,
Lothar
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Message 2 in thread
On 12/2/06, Lothar Schlesier <qt@xxxxxxxxxxx> wrote:
> QObject::connect: Incompatible sender/receiver arguments
> QAction::triggered() -> MainWindow::doSomething(bool)
How does your slot look like? You sure it's a bool?
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Message 3 in thread
Robin Ericsson schrieb:
> On 12/2/06, Lothar Schlesier <qt@xxxxxxxxxxx> wrote:
>> QObject::connect: Incompatible sender/receiver arguments
>> QAction::triggered() -> MainWindow::doSomething(bool)
>
> How does your slot look like? You sure it's a bool?
>
Here is a minimal example. Creating the QAction *a1 causes this error:
Object::connect: Incompatible sender/receiver arguments
QAction::triggered() --> MainWindow::doSomething(bool)
in Qt4.1.5 but not in Qt4.1.2
#include <QtGui>
class MainWindow : public QMainWindow {
Q_OBJECT
public:
MainWindow();
private slots:
void doSomething(bool);
};
MainWindow::MainWindow() {
QMenuBar *menuBar = new QMenuBar();
QMenu *menu = new QMenu( "test", menuBar );
QAction *a1 = menu->addAction( "Problem", this, SLOT(
doSomething(bool) ) );
a1->setCheckable( TRUE );
a1->setChecked( TRUE );
QAction *a2= menu->addAction( "OK" );
a2->setCheckable( TRUE );
a2->setChecked( TRUE );
connect( a2, SIGNAL( triggered(bool) ), this, SLOT( doSomething(bool) ));
menuBar->addMenu( menu );
setMenuBar( menuBar );
resize( 100, 100 );
}
void
MainWindow::doSomething(bool test) {
QString msg = "enabled";
if (!test) msg = "disabled";
QMessageBox::information(this, "Test", msg );
}
Cheers,
Lothar
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