Access QT Widget child members from QT Widget Object Instance - c++

Question

Consider this QWidget initialized as:
QWidget *Logger;
Logger = new QWidget();
QPushButton *btn;
btn= new QPushButton(Logger);
btn->setObjectName(QStringLiteral("pushButton"));
Logger->show();
It display the Logger with a button with text pushButton.
Now Later if i want to access pushButton, i do it like this:
QPushButton *pushButton = Logger->findChild<QPushButton *>("pushButton");
pushButton->setText("NEW BUTTON");
I want to know is there a possibility to access directly this pushButton from Logger??Something like:
Logger->btn ...
I tried but it does not work. I have Widgets defined like this with many child objects and i wonder is this the only way to access them at run time??
EDIT: #drescherjm, So something along these lines you mean:
class MyWidget : QWidget
{
public:
QPushButton *pushButton;
MyWidget(){
pushButton = new QPushButton(this);
}
};
MyWidget *w = new MyWidget();
w->pushButton->setText("XYZ");
And is it worth it to create so many classes?? for small redundant tasks?

Answer 1

It won't work the way that you are expecting it to work. Use btn as long as it is in scope.
If you are creating btn somewhere locally, but your use-case demands you to use it in different places across your code, then you need to reconsider your design and make the QPushButton part of a class member.
Something of this sort :
#include <QPushButton>
class SampleWidget : public QWidget
{
public :
SampleWidget( QWidget * inParent );
// public methods to change the properties of the QPushButton go here.
void SetButtonText( QString const & inString );
bool IsButtonChecked();
private :
QPushButton *mSampleButton;
};
And in the implementation :
SampleWidget::SampleWidget(QWidget *parent)
:
mSampleButton( new QPushButton( parent ) )
{
// connect( mSampleButton,......... ); Connection to slot
}
void SampleWidget::SetButtonText( QString const & inString )
{
mSampleButton->setText( inString );
}
bool
SampleWidget::IsButtonChecked()
{
return mSampleButton->isChecked();
}
The question was not very clear on what you exactly want, but it seems like you are struggling to understand how to alter the attributes of a push button if it is a private member of a class and the above example will help you with that.