QGenericItemModel::MultiColumn< T > Class Template Reference

Represents the wrapped type {T} as multiple columns in a QGenericItemModel. More...

#include <qgenericitemmodel.h>

Collaboration diagram for QGenericItemModel::MultiColumn< T >:

Public Types
using	type = std::remove_pointer_t<T>
template<typename X>
using	if_get_matches

Public Member Functions
template<typename V = T, std::enable_if_t< QGenericItemModelDetails::is_validatable< V >::value, bool > = true>
constexpr	operator bool () const noexcept

Public Attributes
T	data {}

Friends
template<std::size_t I, typename V, if_get_matches< V > = true>
decltype(auto)	get (V &&multiColumn)

Detailed Description

template<typename T>
class QGenericItemModel::MultiColumn< T >

Represents the wrapped type {T} as multiple columns in a QGenericItemModel.

\inmodule QtCore

Since

6.10

Use this type to disambiguate when the type {T} has both a metaobject, and implements \l{the C++ tuple protocol}. The type will be represented as multiple columns, and the individual values will be accessed through the tuple protocol.

class ColorEntry
{
    Q_GADGET
    Q_PROPERTY(QString display MEMBER m_colorName)
    Q_PROPERTY(QColor decoration READ decoration)
    Q_PROPERTY(QString toolTip READ toolTip)
public:
    ColorEntry(const QString &color = {})
        : m_colorName(color)
    {}
 
    QColor decoration() const
    {
        return QColor::fromString(m_colorName);
    }
    QString toolTip() const
    {
        return QColor::fromString(m_colorName).name();
    }
 
private:
    QString m_colorName;
};

namespace std {
    template <> struct tuple_size<ColorEntry> : integral_constant<size_t, 3> {};
    // ...
}
 
QList<QGenericItemModel::MultiColumn<ColorEntry>> colors = {
    // ...
};
QGenericItemModel colorList(colors);

To represent the type a single column value with multiple roles, use QGenericItemModel::SingleColumn instead.

See also

QGenericItemModel::SingleColumn

Definition at line 19 of file qgenericitemmodel.h.

Member Typedef Documentation

if_get_matches

template<typename T>

template<typename X>

using QGenericItemModel::MultiColumn< T >::if_get_matches

Initial value:

 std::enable_if_t<std::is_same_v<q20::remove_cvref_t<X>,
                                                               MultiColumn<T>>, bool>

Definition at line 24 of file qgenericitemmodel.h.

type

template<typename T>

using QGenericItemModel::MultiColumn< T >::type = std::remove_pointer_t<T>

Definition at line 21 of file qgenericitemmodel.h.

Member Function Documentation

operator bool()

template<typename T>

template<typename V = T, std::enable_if_t< QGenericItemModelDetails::is_validatable< V >::value, bool > = true>

QGenericItemModel::MultiColumn< T >::operator bool ( ) const

inlineexplicitconstexprnoexcept

Definition at line 29 of file qgenericitemmodel.h.

Friends And Related Symbol Documentation

get

template<typename T>

template<std::size_t I, typename V, if_get_matches< V > = true>

decltype(auto) get ( V && multiColumn )

friend

Definition at line 33 of file qgenericitemmodel.h.

Member Data Documentation

data

template<typename T>

T QGenericItemModel::MultiColumn< T >::data {}

Definition at line 22 of file qgenericitemmodel.h.

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The documentation for this class was generated from the following file:

• qtbase/src/corelib/itemmodels/qgenericitemmodel.h (546192a6fe0530530c2cca1e9d162648c8faf427)