QTableWidget combobox

[aekilic]

we have made a new .h and a new .cpp

like

#ifndef TABLEIHALESARTNAMEDELEGATE_H
 #define TABLEIHALESARTNAMEDELEGATE_H
 
 #include <QItemDelegate>
 #include <QModelIndex>
 #include <QObject>
 #include <QSize>
 #include <QDoubleSpinBox>
 #include <QtGui>
 
 
 class ComboBoxDelegate : public QItemDelegate
 {
     Q_OBJECT
 
 public:
     ComboBoxDelegate(QObject *parent = 0);
 
     QWidget *createEditor(QWidget *parent, const QStyleOptionViewItem &option,
                           const QModelIndex &index) const;
 };
 
 #endif

#ifndef TABLEIHALESARTNAMEDELEGATE_H
 #define TABLEIHALESARTNAMEDELEGATE_H

 #include <QItemDelegate>
 #include <QModelIndex>
 #include <QObject>
 #include <QSize>
 #include <QDoubleSpinBox>
 #include <QtGui>


 class ComboBoxDelegate : public QItemDelegate
 {
     Q_OBJECT

 public:
     ComboBoxDelegate(QObject *parent = 0);

     QWidget *createEditor(QWidget *parent, const QStyleOptionViewItem &option,
                           const QModelIndex &index) const;
 };

 #endif

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and made our .cpp

#include <QtGui>
#include "tableIhaleSartnameDelegate.h"
 
      QWidget *ComboBoxDelegate::createEditor(QWidget *parent,
           const QStyleOptionViewItem &option,
           const QModelIndex &index) const
      {
         if (index.column() == 0)
         {
            // 2nd column is being edited, return a QComboBox as an editor
            QComboBox *editor = new QComboBox(parent);
 
            return editor;
         }
         return QItemDelegate::createEditor(parent, option, index);
      }

#include <QtGui>
#include "tableIhaleSartnameDelegate.h"

      QWidget *ComboBoxDelegate::createEditor(QWidget *parent,
           const QStyleOptionViewItem &option,
           const QModelIndex &index) const
      {
         if (index.column() == 0)
         {
            // 2nd column is being edited, return a QComboBox as an editor
            QComboBox *editor = new QComboBox(parent);

            return editor;
         }
         return QItemDelegate::createEditor(parent, option, index);
      }

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after that what we should do?

[aekilic]

and how are are going to call for our delegate?

[marcel]

Now you have to use it.

QComboBox *combo = new QComboBox();
combo->setItemDelegate(new ComboBoxDelegate());

QComboBox *combo = new QComboBox();
combo->setItemDelegate(new ComboBoxDelegate());

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You could have seen how to use it if you just looked at the delegate examples.

[aekilic]

I have tried that but we have an error like

QtCore -lz -lm -lrt -ldl -lpthread
obj/moc_anaPencere.o: In function `formIhale::ihaleSartnameGoster()':
moc_anaPencere.cpp.gnu.linkonce.t._ZN9formIhale19ihaleSartnameGoster Ev+0x4d5): undefined reference to `ComboBoxDelegate::ComboBoxDelegate(QObject*)'
collect2: ld returned 1 exit status
make: *** [Deneme34d] Hata 1

[jpn]

I have tried that but we have an error like

QtCore -lz -lm -lrt -ldl -lpthread
obj/moc_anaPencere.o: In function `formIhale::ihaleSartnameGoster()':
moc_anaPencere.cpp.gnu.linkonce.t._ZN9formIhale19ihaleSartnameGoster Ev+0x4d5): undefined reference to `ComboBoxDelegate::ComboBoxDelegate(QObject*)'
collect2: ld returned 1 exit status
make: *** [Deneme34d] Hata 1

Implementation body is missing. In another words, there's a declaration but no implementation for ComboBoxDelegate constructor.

[aekilic]

What should we do?

[jpn]

Plain declaration of a function is not enough. To be able to use a function you must also implement it. So add an implementation for ComboBoxDelegate constructor to your .cpp file:

ComboBoxDelegate::ComboBoxDelegate(QObject *parent)
    QItemDelegate(parent)
{
}

ComboBoxDelegate::ComboBoxDelegate(QObject *parent)
    QItemDelegate(parent)
{
}

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[aekilic]

Dear All

Thank you very much we have solved our problem. We were able to delegate the combobox!