CODEWITHSUNDEEP
c++qt
Roderick
Roderick

Reputation: 2423

How can I change the size of a QDoubleSpinBox?

Nothing I've tried seems to work. setMinimumSize does exactly what I want it to if I switch from a QDoubleSpinBox to a QSpinBox, which leads me to believe this might be a bug in Qt 5.1.

Upvotes: 5

Views: 5897

Answers (2)

jpo38
jpo38

Reputation: 21594

Actually, QDoubleSpinBox and QSpinBox size policy is the same. But note that their minimum width (or width hint) depends on their min/max value. A default QDoubleSpinBox width is very close to QSpinBox one, however, if you QDoubleSpinBox precision is 10 digits and it's max value is set to FLT_MAX, then it's width will become huge as Qt will set it so that the max value will fit without the widegt size being changed.

To fix that, I found two workarounds:

  • simply call setSizePolicy( QSizePolicy( QSizePolicy::Ignored, sizePolicy().verticalPolicy() ) ); on the QDoubleSpinBox. However, now the layout management may make it become so small that it's content is not visible anymore. So this solution is not perfect.

  • once the QDoubleSpinBox is added to a QLayout, update the layout (call layout->update()) and then do spinBox->setMinimumWidth( spinBox->minimumSizeHint().width()/2 );. Now the QDoubleSpinBox may be twice smaller than before. However, large numbers may not be fully visible.

Upvotes: 1

Fay100
Fay100

Reputation: 175

my Qt5.1 looks fine when changing the spinbox size. in the layout? did you set layout settings:

setSizePolicy(QSizePolicy::Ignored,QSizePolicy::Ignored); ?

Upvotes: 3

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