Disable keyboard input for spinbox entry

[babygal]

QSpinBox *spinBox ;
spinBox = new QSpinBox;


There is no setValidator for QSpinBox like as for QLineEdit.
I want to restrict the user's input to clicking up and down arrows only,
and not allow user to type a value into the spin box's line editor.
How to do ?


S.O.S

[saa7_go]

You can subclass QSpinBox, and reimplement keyPressEvent(QKeyEvent *event).
Use QKeyEvent::ignore() to ignore the event.

[aamer4yu]

Or alternatively you can use event filters

[babygal]

I'm not really clear on how to do it exactly? where can i get help or some sample code?

[babygal]

You can subclass QSpinBox, and reimplement keyPressEvent(QKeyEvent *event).
Use QKeyEvent::ignore() to ignore the event.



Hi.What is subclass QSpinBox and how to do it exactly?
Thank you.

[saa7_go]

Hi.What is subclass QSpinBox and how to do it exactly?

You create a new class based on QSpinBox. For example:



#include <QSpinBox>
#include <QKeyEvent>

class SpinBox : public QSpinBox
{
public:
SpinBox(QWidget *parent = 0) : QSpinBox(parent) { }

protected:
// reimplement keyPressEvent
void keyPressEvent(QKeyEvent *event)
{
event->ignore();
}
};

[babygal]

You create a new class based on QSpinBox. For example:



#include <QSpinBox>
#include <QKeyEvent>

class SpinBox : public QSpinBox
{
public:
SpinBox(QWidget *parent = 0) : QSpinBox(parent) { }

protected:
// reimplement keyPressEvent
void keyPressEvent(QKeyEvent *event)
{
event->ignore();
}
};


I just implemented as above and it works!.. Yaayy...Thanks a million!

[Judge Gazza]

I realize this is an old thread, but another option is to make the QLineEdit with in the spin box read only.


class tcNoEditSpinBox : public QSpinBox
{
Q_OBJECT
public:
tcNoEditSpinBox (QWidget *parent) : QSpinBox (parent)
{ lineEdit()->setReadOnly (true); }
};

class tcNoEditDoubleSpinBox : public QDoubleSpinBox
{
Q_OBJECT
public:
tcNoEditDoubleSpinBox (QWidget *parent) : QDoubleSpinBox (parent)
{ lineEdit()->setReadOnly (true); }
};

[d_stranz]

Subclassing is unnecessary. QAbstractSpinBox, from which other spin box classes are derived, has a QAbstractSpinBox::setReadOnly() method which accomplishes what the OP wanted.