Qt-interest Archive, March 2007
QVariant::UserType
Message 1 in thread
I want create QTreeView for program settings where each node can be our
UserType like stuctures:
struct UserData{
int userId;
QString name;
};
struct ProfileSettings{
int countryId;
QString countryname;
};
And i want delegate each type items. For UserData type - QLineEdit, for
ProfileSettings type - QComboBox.
Can i define delegate type like this ?:
factory->registerEditor(QVariant::UserData, LineEditListCreator);
factory->registerEditor(QVariant::ProfileSettings, ComboBoxListCreator);
or
QWidget *VariantDelegate::createEditor(QWidget *parent,const
QStyleOptionViewItem &,const QModelIndex &index) const
{
QVariant originalValue = index.model()->data(index, Qt::UserRole);
if (!isSupportedType(originalValue.type()))
return 0;
switch (originalValue.type())
{
case QVariant::UserData:
QLineEdit *lineEdit = new QLineEdit(parent);
lineEdit->setFrame(false);
return lineEdit;
break;
case QVariant::ProfileSettings:
QComboBox *combo = new QComboBox(parent);
return combo;
break;
default:
QLineEdit *lineEdit = new QLineEdit(parent);
lineEdit->setFrame(false);
return lineEdit;
}
}
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Message 2 in thread
On 23.03.07 12:38:22, SABROG wrote:
> I want create QTreeView for program settings where each node can be our
> UserType like stuctures:
>
> struct UserData{
> int userId;
> QString name;
> };
>
> struct ProfileSettings{
> int countryId;
> QString countryname;
> };
>
> And i want delegate each type items. For UserData type - QLineEdit, for
> ProfileSettings type - QComboBox.
>
> Can i define delegate type like this ?:
>
> factory->registerEditor(QVariant::UserData, LineEditListCreator);
> factory->registerEditor(QVariant::ProfileSettings, ComboBoxListCreator);
>
> or
>
> QWidget *VariantDelegate::createEditor(QWidget *parent,const
> QStyleOptionViewItem &,const QModelIndex &index) const
> {
> QVariant originalValue = index.model()->data(index, Qt::UserRole);
> if (!isSupportedType(originalValue.type()))
> return 0;
>
> switch (originalValue.type())
> {
> case QVariant::UserData:
The answer to both is basically: no. At least not unless you extend the
enum from QVariant with your own types. However thats not really needed
I think, you can just register your custom types with
Q_DECLARE_METATYPE and qRegisterMetaType (see docs for QMetaType class)
and then use something like
if( variant.canConvert<UserData>() )
<line-edit-creation>
else if ( variant.canConvert<ProfileSettings>() )
<combobox>
Andreas
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