How to connect a bool flag with a widget enable bool

vasu_gupta

I have a button save as and i want it to active if and only if a bool edit is true ,in case this bool edit is again resetted save as option again becomes disable.

How to do this

raven-worx

@vasu_gupta
see Qt's signals/slots concept

QObject::connect( checkBox, &QCheckBox::toggled, saveBtn, &QPushButton::setEnabled );

vasu_gupta

@raven-worx i m not using a checkbox but a simple boolean variable

mrjj

You can do
button->setEnabled(Mybool);

You cannot bind a variable to widget as such. Not with connect.

How is this "bool edit" altered ?

J.Hilk

@vasu_gupta

#include <QObject>
class booleanWithSignal : public QObject
{
   Q_OBJECT

public:
void setTrue(){
    if(b != true)
        emit changed(true);
    b = true;
}

void setFalse(){
    if(b != false)
        emit changed(false);
    b = true;
}

const bool &state(){return b;}

signals:
void changed(bool state);

private:
bool b = false;

}

// in your ui-class
booleanWithSignal allowSave;
connect(&allowSave, &booleanWithSignal::changed,mySaveBtn, &QPushButton::setEnabled);

Taz742

@vasu_gupta said in How to connect a bool flag with a widget enable bool:

@raven-worx i m not using a checkbox but a simple boolean variable

and what are you using?

dheerendra

as it already suggested by other in the group, please go through signals/slots. Try few examples with how signals/slots work. This should give good info to achieve your use case.