HorizontalHeaderView QML Type

Provides a horizontal header view to accompany a TableView. More...

Import Statement:	import QtQuick.Controls
Inherits:	TableView

List of all members, including inherited members

Properties

model : QVariant
syncView : TableView
textRole : QString

Detailed Description

A HorizontalHeaderView provides a styled table header. It can either be used as an independent view or header for a TableView.

You can add a header for a TableView by assigning the TableView to the syncView property of HorizontalHeaderView. The header and the table will then be kept in sync while flicking.

By default, HorizontalHeaderView displays header data from the sync view's model. If you don't wish to use header data from that model, or you don't use a syncView, you can assign a model explicitly to the model property.

Note: In order to show the header data of a QAbstractItemModel, HorizontalHeaderView will internally wrap the model's header data in an independent proxy model. This model shares no model items with the application model. This means that if you call functions such as index(), the model index you get back will belong to the proxy model and not the application model.

By default, textRole is set to "display", meaning that data from the model's Qt::DisplayRole will be used. You can set this to another role name in order to have that data displayed instead.

The application is responsible for placing the header at the correct location in the scene. You can add as many headers as you want to a single TableView, which can be useful if you for example want to place headers on all four sides of the table.

The following snippet shows how you can add a horizontal and vertical header view to a table view:

import QtQuick
import QtQuick.Controls
import Qt.labs.qmlmodels

ApplicationWindow {
    visible: true
    width: 640
    height: 480
    title: qsTr("HeaderView")

    Rectangle {
        anchors.fill: parent
        // The background color will show through the cell
        // spacing, and therefore become the grid line color.
        color: Application.styleHints.appearance === Qt.Light ? palette.mid : palette.midlight

        HorizontalHeaderView {
            id: horizontalHeader
            anchors.left: tableView.left
            anchors.top: parent.top
            syncView: tableView
            clip: true
        }

        VerticalHeaderView {
            id: verticalHeader
            anchors.top: tableView.top
            anchors.left: parent.left
            syncView: tableView
            clip: true
        }

        TableView {
            id: tableView
            anchors.left: verticalHeader.right
            anchors.top: horizontalHeader.bottom
            anchors.right: parent.right
            anchors.bottom: parent.bottom
            clip: true

            columnSpacing: 1
            rowSpacing: 1

            model: TableModel {
                TableModelColumn { display: "name" }
                TableModelColumn { display: "color" }

                rows: [
                    {
                        "name": "cat",
                        "color": "black"
                    },
                    {
                        "name": "dog",
                        "color": "brown"
                    },
                    {
                        "name": "bird",
                        "color": "white"
                    }
                ]
            }

            delegate: Rectangle {
                implicitWidth: 100
                implicitHeight: 20
                color: palette.base
                Label {
                    text: display
                }
            }
        }
    }
}

A HorizontalHeaderView will have resizableColumns set to true by default.

See also VerticalHeaderView.

Property Documentation

model : QVariant

This property holds the model providing data for the horizontal header view.

By default, horizontal header view displays header data from the sync view's model. If you don't wish to use header data from that model, or you don't use a syncView, you can assign a model explicitly to this property. If model is a QAbstractTableModel, it's header data will be used. Otherwise, if it's a QAbstractItemModel, data will be used.

In addition to QAbstractItemModels, you can also assign other kinds of models to this property, such as JavaScript arrays.

See also TableView, model, and QAbstractTableModel.

syncView : TableView

This property holds the TableView to synchronize with.

Once this property is bound to another TableView, both header and table will synchronize with regard to column widths, column spacing, and flicking horizontally.

If the model is not explicitly set, then the header will use the syncView's model to label the columns.

See also model and TableView.

textRole : QString

This property holds the model role used to display text in each header cell.

When the model has multiple roles, textRole can be set to determine which role should be displayed.

If model is a QAbstractItemModel then it will default to "display"; otherwise it is empty.

A warning is given if the model's roleNames() doesn't provide the role specified in textRole. The warning can be silenced by setting the textRole.

See also QAbstractItemModel::roleNames().

© 2024 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners. The documentation provided herein is licensed under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation. Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners.