QTableView Class

The QTableView class provides a default model/view implementation of a table view. More...

Header:	#include <QTableView>
qmake:	QT += widgets
Inherits:	QAbstractItemView
Inherited By:	QTableWidget

• List of all members, including inherited members
• Obsolete members

Properties

cornerButtonEnabled : bool gridStyle : Qt::PenStyle showGrid : bool

sortingEnabled : bool wordWrap : bool

Public Functions

	QTableView(QWidget *parent = nullptr)
virtual	~QTableView()
void	clearSpans()
int	columnAt(int x) const
int	columnSpan(int row, int column) const
int	columnViewportPosition(int column) const
int	columnWidth(int column) const
Qt::PenStyle	gridStyle() const
QHeaderView *	horizontalHeader() const
bool	isColumnHidden(int column) const
bool	isCornerButtonEnabled() const
bool	isRowHidden(int row) const
bool	isSortingEnabled() const
int	rowAt(int y) const
int	rowHeight(int row) const
int	rowSpan(int row, int column) const
int	rowViewportPosition(int row) const
void	setColumnHidden(int column, bool hide)
void	setColumnWidth(int column, int width)
void	setCornerButtonEnabled(bool enable)
void	setGridStyle(Qt::PenStyle style)
void	setHorizontalHeader(QHeaderView *header)
void	setRowHeight(int row, int height)
void	setRowHidden(int row, bool hide)
void	setSortingEnabled(bool enable)
void	setSpan(int row, int column, int rowSpanCount, int columnSpanCount)
void	setVerticalHeader(QHeaderView *header)
void	setWordWrap(bool on)
bool	showGrid() const
QHeaderView *	verticalHeader() const
bool	wordWrap() const

Reimplemented Public Functions

virtual QModelIndex	indexAt(const QPoint &pos) const override
virtual void	setModel(QAbstractItemModel *model) override
virtual void	setRootIndex(const QModelIndex &index) override
virtual void	setSelectionModel(QItemSelectionModel *selectionModel) override

Public Slots

void	hideColumn(int column)
void	hideRow(int row)
void	resizeColumnToContents(int column)
void	resizeColumnsToContents()
void	resizeRowToContents(int row)
void	resizeRowsToContents()
void	selectColumn(int column)
void	selectRow(int row)
void	setShowGrid(bool show)
void	showColumn(int column)
void	showRow(int row)
void	sortByColumn(int column, Qt::SortOrder order)

Reimplemented Protected Functions

virtual void	currentChanged(const QModelIndex &current, const QModelIndex &previous) override
virtual int	horizontalOffset() const override
virtual bool	isIndexHidden(const QModelIndex &index) const override
virtual QModelIndex	moveCursor(QAbstractItemView::CursorAction cursorAction, Qt::KeyboardModifiers modifiers) override
virtual void	paintEvent(QPaintEvent *event) override
virtual QModelIndexList	selectedIndexes() const override
virtual void	selectionChanged(const QItemSelection &selected, const QItemSelection &deselected) override
virtual void	setSelection(const QRect &rect, QItemSelectionModel::SelectionFlags flags) override
virtual int	sizeHintForColumn(int column) const override
virtual int	sizeHintForRow(int row) const override
virtual void	timerEvent(QTimerEvent *event) override
virtual void	updateGeometries() override
virtual int	verticalOffset() const override
virtual QStyleOptionViewItem	viewOptions() const override
virtual QSize	viewportSizeHint() const override

Protected Slots

void	columnCountChanged(int oldCount, int newCount)
void	columnMoved(int column, int oldIndex, int newIndex)
void	columnResized(int column, int oldWidth, int newWidth)
void	rowCountChanged(int oldCount, int newCount)
void	rowMoved(int row, int oldIndex, int newIndex)
void	rowResized(int row, int oldHeight, int newHeight)

Detailed Description

A QTableView implements a table view that displays items from a model. This class is used to provide standard tables that were previously provided by the QTable class, but using the more flexible approach provided by Qt's model/view architecture.

The QTableView class is one of the Model/View Classes and is part of Qt's model/view framework.

QTableView implements the interfaces defined by the QAbstractItemView class to allow it to display data provided by models derived from the QAbstractItemModel class.

Navigation

You can navigate the cells in the table by clicking on a cell with the mouse, or by using the arrow keys. Because QTableView enables tabKeyNavigation by default, you can also hit Tab and Backtab to move from cell to cell.

Visual Appearance

The table has a vertical header that can be obtained using the verticalHeader() function, and a horizontal header that is available through the horizontalHeader() function. The height of each row in the table can be found by using rowHeight(); similarly, the width of columns can be found using columnWidth(). Since both of these are plain widgets, you can hide either of them using their hide() functions.

Rows and columns can be hidden and shown with hideRow(), hideColumn(), showRow(), and showColumn(). They can be selected with selectRow() and selectColumn(). The table will show a grid depending on the showGrid property.

The items shown in a table view, like those in the other item views, are rendered and edited using standard delegates. However, for some tasks it is sometimes useful to be able to insert widgets in a table instead. Widgets are set for particular indexes with the setIndexWidget() function, and later retrieved with indexWidget().

By default, the cells in a table do not expand to fill the available space. You can make the cells fill the available space by stretching the last header section. Access the relevant header using horizontalHeader() or verticalHeader() and set the header's stretchLastSection property. To distribute the available space according to the space requirement of each column or row, call the view's resizeColumnsToContents() or resizeRowsToContents() functions.

Coordinate Systems

For some specialized forms of tables it is useful to be able to convert between row and column indexes and widget coordinates. The rowAt() function provides the y-coordinate within the view of the specified row; the row index can be used to obtain a corresponding y-coordinate with rowViewportPosition(). The columnAt() and columnViewportPosition() functions provide the equivalent conversion operations between x-coordinates and column indexes.

See also QTableWidget, View Classes, QAbstractItemModel, QAbstractItemView, Chart Example, Pixelator Example, and Table Model Example.

Member Function Documentation

QTableView::QTableView(QWidget *parent = nullptr)

Constructs a table view with a parent to represent the data.

See also QAbstractItemModel.

[protected slot] void QTableView::columnCountChanged(int oldCount, int newCount)

This slot is called whenever columns are added or deleted. The previous number of columns is specified by oldCount, and the new number of columns is specified by newCount.

[protected slot] void QTableView::columnMoved(int column, int oldIndex, int newIndex)

This slot is called to change the index of the given column in the table view. The old index is specified by oldIndex, and the new index by newIndex.

See also rowMoved().

[protected slot] void QTableView::columnResized(int column, int oldWidth, int newWidth)

This slot is called to change the width of the given column. The old width is specified by oldWidth, and the new width by newWidth.

See also rowResized().

[slot] void QTableView::hideColumn(int column)

Hide the given column.

See also showColumn() and hideRow().

[slot] void QTableView::hideRow(int row)

Hide the given row.

See also showRow() and hideColumn().

[slot] void QTableView::resizeColumnToContents(int column)

Resizes the given column based on the size hints of the delegate used to render each item in the column.

Note: Only visible columns will be resized. Reimplement sizeHintForColumn() to resize hidden columns as well.

See also resizeColumnsToContents(), sizeHintForColumn(), and QHeaderView::resizeContentsPrecision().

[slot] void QTableView::resizeColumnsToContents()

Resizes all columns based on the size hints of the delegate used to render each item in the columns.

See also resizeColumnToContents(), sizeHintForColumn(), and QHeaderView::resizeContentsPrecision().

[slot] void QTableView::resizeRowToContents(int row)

Resizes the given row based on the size hints of the delegate used to render each item in the row.

See also resizeRowsToContents(), sizeHintForRow(), and QHeaderView::resizeContentsPrecision().

[slot] void QTableView::resizeRowsToContents()

Resizes all rows based on the size hints of the delegate used to render each item in the rows.

See also resizeRowToContents(), sizeHintForRow(), and QHeaderView::resizeContentsPrecision().

[protected slot] void QTableView::rowCountChanged(int oldCount, int newCount)

This slot is called whenever rows are added or deleted. The previous number of rows is specified by oldCount, and the new number of rows is specified by newCount.

[protected slot] void QTableView::rowMoved(int row, int oldIndex, int newIndex)

This slot is called to change the index of the given row in the table view. The old index is specified by oldIndex, and the new index by newIndex.

See also columnMoved().

[protected slot] void QTableView::rowResized(int row, int oldHeight, int newHeight)

This slot is called to change the height of the given row. The old height is specified by oldHeight, and the new height by newHeight.

See also columnResized().

[slot] void QTableView::selectColumn(int column)

Selects the given column in the table view if the current SelectionMode and SelectionBehavior allows columns to be selected.

See also selectRow().

[slot] void QTableView::selectRow(int row)

Selects the given row in the table view if the current SelectionMode and SelectionBehavior allows rows to be selected.

See also selectColumn().

[slot] void QTableView::showColumn(int column)

Show the given column.

See also hideColumn() and showRow().

[slot] void QTableView::showRow(int row)

Show the given row.

See also hideRow() and showColumn().

[slot] void QTableView::sortByColumn(int column, Qt::SortOrder order)

Sorts the model by the values in the given column and order.

column may be -1, in which case no sort indicator will be shown and the model will return to its natural, unsorted order. Note that not all models support this and may even crash in this case.

This function was introduced in Qt 4.2.

See also sortingEnabled.

[virtual] QTableView::~QTableView()

Destroys the table view.

void QTableView::clearSpans()

Removes all row and column spans in the table view.

This function was introduced in Qt 4.4.

See also setSpan().

int QTableView::columnAt(int x) const

Returns the column in which the given x-coordinate, x, in contents coordinates is located.

Note: This function returns -1 if the given coordinate is not valid (has no column).

See also rowAt().

int QTableView::columnSpan(int row, int column) const

Returns the column span of the table element at (row, column). The default is 1.

This function was introduced in Qt 4.2.

See also setSpan() and rowSpan().

int QTableView::columnViewportPosition(int column) const

Returns the x-coordinate in contents coordinates of the given column.

int QTableView::columnWidth(int column) const

Returns the width of the given column.

See also setColumnWidth(), resizeColumnToContents(), and rowHeight().

[override virtual protected] void QTableView::currentChanged(const QModelIndex &current, const QModelIndex &previous)

Reimplements: QAbstractItemView::currentChanged(const QModelIndex &current, const QModelIndex &previous).

QHeaderView *QTableView::horizontalHeader() const

Returns the table view's horizontal header.

See also setHorizontalHeader(), verticalHeader(), and QAbstractItemModel::headerData().

[override virtual protected] int QTableView::horizontalOffset() const

Reimplements: QAbstractItemView::horizontalOffset() const.

Returns the horizontal offset of the items in the table view.

Note that the table view uses the horizontal header section positions to determine the positions of columns in the view.

See also verticalOffset().

[override virtual] QModelIndex QTableView::indexAt(const QPoint &pos) const

Reimplements: QAbstractItemView::indexAt(const QPoint &point) const.

Returns the index position of the model item corresponding to the table item at position pos in contents coordinates.

bool QTableView::isColumnHidden(int column) const

Returns true if the given column is hidden; otherwise returns false.

See also isRowHidden().

[override virtual protected] bool QTableView::isIndexHidden(const QModelIndex &index) const

Reimplements: QAbstractItemView::isIndexHidden(const QModelIndex &index) const.

bool QTableView::isRowHidden(int row) const

Returns true if the given row is hidden; otherwise returns false.

See also isColumnHidden().

[override virtual protected] QModelIndex QTableView::moveCursor(QAbstractItemView::CursorAction cursorAction, Qt::KeyboardModifiers modifiers)

Reimplements: QAbstractItemView::moveCursor(QAbstractItemView::CursorAction cursorAction, Qt::KeyboardModifiers modifiers).

Moves the cursor in accordance with the given cursorAction, using the information provided by the modifiers.

See also QAbstractItemView::CursorAction.

[override virtual protected] void QTableView::paintEvent(QPaintEvent *event)

Reimplements: QAbstractScrollArea::paintEvent(QPaintEvent *event).

Paints the table on receipt of the given paint event event.

int QTableView::rowAt(int y) const

Returns the row in which the given y-coordinate, y, in contents coordinates is located.

Note: This function returns -1 if the given coordinate is not valid (has no row).

See also columnAt().

int QTableView::rowHeight(int row) const

Returns the height of the given row.

See also setRowHeight(), resizeRowToContents(), and columnWidth().

int QTableView::rowSpan(int row, int column) const

Returns the row span of the table element at (row, column). The default is 1.

This function was introduced in Qt 4.2.

See also setSpan() and columnSpan().

int QTableView::rowViewportPosition(int row) const

Returns the y-coordinate in contents coordinates of the given row.

[override virtual protected] QModelIndexList QTableView::selectedIndexes() const

Reimplements: QAbstractItemView::selectedIndexes() const.

[override virtual protected] void QTableView::selectionChanged(const QItemSelection &selected, const QItemSelection &deselected)

Reimplements: QAbstractItemView::selectionChanged(const QItemSelection &selected, const QItemSelection &deselected).

void QTableView::setColumnHidden(int column, bool hide)

If hide is true the given column will be hidden; otherwise it will be shown.

See also isColumnHidden() and setRowHidden().

void QTableView::setColumnWidth(int column, int width)

Sets the width of the given column to be width.

This function was introduced in Qt 4.1.

See also columnWidth().

void QTableView::setHorizontalHeader(QHeaderView *header)

Sets the widget to use for the horizontal header to header.

See also horizontalHeader() and setVerticalHeader().

[override virtual] void QTableView::setModel(QAbstractItemModel *model)

Reimplements: QAbstractItemView::setModel(QAbstractItemModel *model).

[override virtual] void QTableView::setRootIndex(const QModelIndex &index)

Reimplements: QAbstractItemView::setRootIndex(const QModelIndex &index).

void QTableView::setRowHeight(int row, int height)

Sets the height of the given row to be height.

This function was introduced in Qt 4.1.

See also rowHeight().

void QTableView::setRowHidden(int row, bool hide)

If hide is true row will be hidden, otherwise it will be shown.

See also isRowHidden() and setColumnHidden().

[override virtual protected] void QTableView::setSelection(const QRect &rect, QItemSelectionModel::SelectionFlags flags)

Reimplements: QAbstractItemView::setSelection(const QRect &rect, QItemSelectionModel::SelectionFlags flags).

Selects the items within the given rect and in accordance with the specified selection flags.

[override virtual] void QTableView::setSelectionModel(QItemSelectionModel *selectionModel)

Reimplements: QAbstractItemView::setSelectionModel(QItemSelectionModel *selectionModel).

void QTableView::setSortingEnabled(bool enable)

If enable is true, enables sorting for the table and immediately trigger a call to sortByColumn() with the current sort section and order

Note: Setter function for property sortingEnabled.

See also isSortingEnabled().

void QTableView::setSpan(int row, int column, int rowSpanCount, int columnSpanCount)

Sets the span of the table element at (row, column) to the number of rows and columns specified by (rowSpanCount, columnSpanCount).

This function was introduced in Qt 4.2.

See also rowSpan() and columnSpan().

void QTableView::setVerticalHeader(QHeaderView *header)

Sets the widget to use for the vertical header to header.

See also verticalHeader() and setHorizontalHeader().

[override virtual protected] int QTableView::sizeHintForColumn(int column) const

Reimplements: QAbstractItemView::sizeHintForColumn(int column) const.

Returns the size hint for the given column's width or -1 if there is no model.

If you need to set the width of a given column to a fixed value, call QHeaderView::resizeSection() on the table's horizontal header.

If you reimplement this function in a subclass, note that the value you return will be used when resizeColumnToContents() or QHeaderView::resizeSections() is called. If a larger column width is required by either the horizontal header or the item delegate, the larger width will be used instead.

See also QWidget::sizeHint, horizontalHeader(), and QHeaderView::resizeContentsPrecision().

[override virtual protected] int QTableView::sizeHintForRow(int row) const

Reimplements: QAbstractItemView::sizeHintForRow(int row) const.

Returns the size hint for the given row's height or -1 if there is no model.

If you need to set the height of a given row to a fixed value, call QHeaderView::resizeSection() on the table's vertical header.

If you reimplement this function in a subclass, note that the value you return is only used when resizeRowToContents() is called. In that case, if a larger row height is required by either the vertical header or the item delegate, that width will be used instead.

See also QWidget::sizeHint, verticalHeader(), and QHeaderView::resizeContentsPrecision().

[override virtual protected] void QTableView::timerEvent(QTimerEvent *event)

Reimplements: QAbstractItemView::timerEvent(QTimerEvent *event).

[override virtual protected] void QTableView::updateGeometries()

Reimplements: QAbstractItemView::updateGeometries().

QHeaderView *QTableView::verticalHeader() const

Returns the table view's vertical header.

See also setVerticalHeader(), horizontalHeader(), and QAbstractItemModel::headerData().

[override virtual protected] int QTableView::verticalOffset() const

Reimplements: QAbstractItemView::verticalOffset() const.

Returns the vertical offset of the items in the table view.

Note that the table view uses the vertical header section positions to determine the positions of rows in the view.

See also horizontalOffset().

[override virtual protected] QStyleOptionViewItem QTableView::viewOptions() const

Reimplements: QAbstractItemView::viewOptions() const.

[override virtual protected] QSize QTableView::viewportSizeHint() const

Reimplements: QAbstractItemView::viewportSizeHint() const.