How to mark the whole text by double clicking for QDoubleSpinBox? - c++

Question

I have a class which inherit from QDoubleSpinBox.
class NumericEdit : public QDoubleSpinBox
{
public:
NumericEdit( QWidget *p_parent = nullptr );
protected:
bool event( QEvent *p_event ) override;
void keyPressEvent( QKeyEvent *p_event ) override;
void keyReleaseEvent( QKeyEvent *p_event ) override;
void focusInEvent( QFocusEvent *p_event ) override;
void focusOutEvent( QFocusEvent *p_event ) override;
............
};
NumericEdit::NumericEdit( QWidget *p_parent ) : QDoubleSpinBox( p_parent )
{
initStyleSheet();
setButtonSymbols( QAbstractSpinBox::NoButtons );
setGroupSeparatorShown( true );
..........
}
The result when I double click into the editing field is like this, only the part in between group separators is marked. If I triple click, the whole text is then marked.
How should I change, sothat when I double click into the editing field (no matter in integer part or decimal part), the whole text is marked?

Answer 1

Solution is reimplementing of QLineEdit::mouseDoubleClickEvent method (not QDoubleSpinBox::mouseDoubleClickEvent).
Custom line edit:
class ExtendedLineEdit : public QLineEdit
{
Q_OBJECT
public:
explicit ExtendedLineEdit(QWidget *parent = nullptr);
protected:
void mouseDoubleClickEvent(QMouseEvent *event);
}
void ExtendedLineEdit::mouseDoubleClickEvent(QMouseEvent *event)
{
if (event->button() == Qt::LeftButton)
{
selectAll();
event->accept();
return;
}
QLineEdit::mouseDoubleClickEvent(event);
}
And then set it to your custom spin box
NumericEdit::NumericEdit(QWidget *p_parent) : QDoubleSpinBox(p_parent)
{
//...
ExtendedLineEdit* lineEdit = new ExtendedLineEdit(this);
setLineEdit(lineEdit);
}