- Qt 5.5
- Qt Quick Extras
- QML Types
- Tumbler QML Type
- Qt 5.5.1 Reference Documentation

# Tumbler QML Type

A control that can have several spinnable wheels, each with items that can be selected. More...

Import Statement: | import QtQuick.Extras 1.4
Since: | Qt 5.5

- List of all members, including inherited members

## Properties

- columnCount : int

## Methods

- TumblerColumn addColumn(TumblerColumn column)
- int currentIndexAt(int columnIndex)
- TumblerColumn getColumn(int columnIndex)
- TumblerColumn insertColumn(int index, TumblerColumn column)
- void setCurrentIndexAt(int columnIndex, int itemIndex)

## Detailed Description

Note: Tumbler requires Qt 5.5.0 or later.

The Tumbler control is used with one or more TumblerColumn items, which define the content of each column:

    Tumbler {
        TumblerColumn {
            model: 5
        }
        TumblerColumn {
            model: [0, 1, 2, 3, 4]
        }
        TumblerColumn {
            model: ["A", "B", "C", "D", "E"]
        }
    }

You can also use a traditional model with roles:

    Rectangle {
        width: 220
        height: 350
        color: "#494d53"

        ListModel {
            id: listModel

            ListElement {
                foo: "A"
                bar: "B"
                baz: "C"
            }
            ListElement {
                foo: "A"
                bar: "B"
                baz: "C"
            }
            ListElement {
                foo: "A"
                bar: "B"
                baz: "C"
            }
        }

        Tumbler {
            anchors.centerIn: parent

            TumblerColumn {
                model: listModel
                role: "foo"
            }
            TumblerColumn {
                model: listModel
                role: "bar"
            }
            TumblerColumn {
                model: listModel
                role: "baz"
            }
        }
    }

## Limitations

For technical reasons, the model count must be equal to or greater than visibleItemCount plus one. The visibleItemCount must also be an odd number.

You can create a custom appearance for a Tumbler by assigning a TumblerStyle. To style individual columns, use the delegate and highlight properties of TumblerColumn.

## Property Documentation

read-only columnCount : int

The number of columns in the Tumbler.

## Method Documentation

TumblerColumn addColumn(TumblerColumn column)

Adds a column and returns the added column.

The column argument can be an instance of TumblerColumn, or a Component. The component has to contain a TumblerColumn. Otherwise `null` is returned.

int currentIndexAt(int columnIndex)

Returns the current index of the column at columnIndex, or `null` if the index is invalid.

TumblerColumn getColumn(int columnIndex)

Returns the column at columnIndex or `null` if the index is invalid.

TumblerColumn insertColumn(int index, TumblerColumn column)

Inserts a column at the given index and returns the inserted column.

The column argument can be an instance of TumblerColumn, or a Component. The component has to contain a TumblerColumn. Otherwise, `null` is returned.

void setCurrentIndexAt(int columnIndex, int itemIndex)

Sets the current index of the column at columnIndex to itemIndex.

Does nothing if columnIndex or itemIndex are invalid.