Position of a Qt Combobox dropdown

sunil.nair

My problem is that the anything I do in the QAbstractItemView is not being reflected in the combobox? I can't find out why?

    //set max visible to 3 items
    setMaxVisibleItems(3);
    //Do not insert item to combobox on pressing enter
    setInsertPolicy(QComboBox::NoInsert);
    //Set its size policy to [fixed,fixed]
    setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
    //Set height and width
    setFixedSize(133,35);
    //We change the default item delegate to styled item delegate so we can modify using stylesheets
    QStyledItemDelegate* itemDelegate = new QStyledItemDelegate();
    setItemDelegate(itemDelegate);

    //customize the combobox using stylesheet. QAbstractItemView is the popup view when the down arrow is clicked
    setStyleSheet("QComboBox {\
                  border: 1px solid rgb(228,228,228);\
                      border-radius: 2px;\
                  font-family: \"Helvetica Neue Med\";\
                  font-size: 11px;padding-left:25px;\
              }\
              \
              QComboBox:!editable {\
                  color: rgb(72,72,72);\
                  background:  rgb(228,228,228);\
              }\
              \
              QComboBox::drop-down {\
                  background:  rgb(228,228,228);\
                  width: 45px;\
              }\
              \
              QComboBox::down-arrow {\
                  subcontrol-position: left;\
                  image: url(:/images/Arrow_off.png);\
              }\
              QComboBox::down-arrow:on { \
                  image: url(:/images/Arrow_on.png);\
              }\
                \
              QComboBox QAbstractItemView {\
                  color: rgb(72,72,72);\
                  background: rgb(228,228,228);\
                  min-width:233px;\
              }\
              \
              QComboBox QAbstractItemView::item {\
                  min-height: 27px;max-height:27px;\
                  border-bottom: 0px solid rgb(40,40,40);\
                  padding-right: 25px;\
              }\
              \
              QComboBox QAbstractItemView::item:selected {\
                  background: rgb(72,72,72);\
                  color:rgb(28,228,228);\
                  padding-right: 25px;\
              }\
              ");

MaxDevI

Hi @sunil-nair, can you please post the code where you make the QComboBox, and any related style changes?

Also, maybe you can try setting a padding for the QComboBox?

QComboBox {
        padding: 1px 0px 1px 3px;
}

sunil.nair

This post is deleted!

sunil.nair

This post is deleted!

p3c0

@sunil-nair Does it work if you donot provide the QStyledItemDelegate ? What was the purpose of using it if you haven't subclassed it ?

sunil.nair

@p3c0 No if I dont use StyledItemdelegate, the entire list becomes non stylable. I have updated the mainquestion by inserting the code.

p3c0

@sunil-nair I think if you want to use it QStyledItemDelegate you need to subclass it then re-implement paint then initStyleOption to initialize its defaults.

void paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const {
  ...
  ...
  initStyleOption(&option, index);
  ...
  ...
}

sunil.nair

Thanks but I guess I figured something. If the QCombobox is non editable it cannot be styled (i am not able to ) using QAbstractItemView. Any styling on it requires a QListView object and we need to setView(QListView)

void SteuerQComboBox::showPopup() {
QComboBox::showPopup();
QWidget popup = this->findChild<QFrame>();
popup->move(popup->x(),popup->y()-this->height()-popup->height());
}

We can now position it anywhere we want. Please refer: http://stackoverflow.com/questions/10057140/how-to-make-qcombobox-popup-upwards

p3c0

@sunil-nair So what was the question exactly ? Make the popup pop upwards ?

sunil.nair

I apologise for the delay in response. The question was to make sure that the combobox always pops up in a given direction or position.