Qt 4.3: QTableView Class Reference

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# QTableView Class Reference
[QtGui module]

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

     #include <QTableView>

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

- 14 properties inherited from QAbstractItemView
- 2 properties inherited from QAbstractScrollArea
- 6 properties inherited from QFrame
- 56 properties inherited from QWidget
- 1 property inherited from QObject

### Public Functions

- QTableView ( QWidget * parent = 0 )
- ~QTableView ()
- 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
- virtual QModelIndex indexAt ( const QPoint & pos ) 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 rowSpan, int columnSpan )
- void setVerticalHeader ( QHeaderView * header )
- void setWordWrap ( bool on )
- bool showGrid () const
- void sortByColumn ( int column, Qt::SortOrder order )
- QHeaderView * verticalHeader () const
- bool wordWrap () const

- 52 public functions inherited from QAbstractItemView
- 15 public functions inherited from QAbstractScrollArea
- 13 public functions inherited from QFrame
- 201 public functions inherited from QWidget
- 29 public functions inherited from QObject
- 12 public functions inherited from QPaintDevice

### 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 )

- 9 public slots inherited from QAbstractItemView
- 19 public slots inherited from QWidget
- 1 public slot inherited from QObject

### Protected Functions

- virtual int horizontalOffset () const
- virtual QModelIndex moveCursor ( CursorAction cursorAction, Qt::KeyboardModifiers modifiers )
- virtual void paintEvent ( QPaintEvent * event )
- virtual void setSelection ( const QRect & rect, QItemSelectionModel::SelectionFlags flags )
- virtual int sizeHintForColumn ( int column ) const
- virtual int sizeHintForRow ( int row ) const
- virtual int verticalOffset () const

- 33 protected functions inherited from QAbstractItemView
- 16 protected functions inherited from QAbstractScrollArea
- 38 protected functions inherited from QWidget
- 7 protected functions inherited from QObject
- 1 protected function inherited from QPaintDevice

### 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 )

- 8 protected slots inherited from QAbstractItemView
- 1 protected slot inherited from QAbstractScrollArea
- 1 protected slot inherited from QWidget

### Additional Inherited Members

- 6 signals inherited from QAbstractItemView
- 1 signal inherited from QWidget
- 1 signal inherited from QObject
- 4 static public members inherited from QWidget
- 5 static public members inherited from QObject

## Detailed Description

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

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.

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.

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

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(). They are both just QWidgets so 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().

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.

A Windows XP style table view. | A Macintosh style table view. | A Plastique style table view.

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

## Property Documentation

### cornerButtonEnabled : bool

This property holds whether the button in the top-left corner is enabled.

If this property is true then button in the top-left corner of the table view is enabled. Clicking on this button will select all the cells in the table view.

This property is true by default.

This property was introduced in Qt 4.3.

Access functions:

- bool isCornerButtonEnabled () const
- void setCornerButtonEnabled ( bool enable )

### gridStyle : Qt::PenStyle

This property holds the pen style used to draw the grid.

This property holds the style used when drawing the grid (see showGrid).

Access functions:

- Qt::PenStyle gridStyle () const
- void setGridStyle ( Qt::PenStyle style )

### showGrid : bool

This property holds whether the grid is shown.

If this property is true a grid is drawn for the table; if the property is false, no grid is drawn. The default value is true.

Access functions:

- bool showGrid () const
- void setShowGrid ( bool show )

### sortingEnabled : bool

This property holds whether sorting is enabled.

If this property is true, sorting is enabled for the table; if the property is false, sorting is not enabled. The default value is false.

This property was introduced in Qt 4.2.

Access functions:

- bool isSortingEnabled () const
- void setSortingEnabled ( bool enable )

See also sortByColumn().

### wordWrap : bool

This property holds the item text word-wrapping policy.

If this property is true then the item text is wrapped where necessary at word-breaks; otherwise it is not wrapped at all. This property is true by default.

This property was introduced in Qt 4.3.

Access functions:

- bool wordWrap () const
- void setWordWrap ( bool on )

## Member Function Documentation

### QTableView::QTableView ( QWidget * parent = 0 )

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

See also QAbstractItemModel.

### QTableView::~QTableView ()

Destroys the table view.

### int QTableView::columnAt ( int x ) const

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

See also rowAt().

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

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.

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

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().

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

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().

### 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().

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

Hide the given column.

See also showColumn() and hideRow().

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

Hide the given row.

See also showRow() and hideColumn().

### QHeaderView * QTableView::horizontalHeader () const

Returns the table view's horizontal header.

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

### int QTableView::horizontalOffset () const `[virtual protected]`

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.

Reimplemented from QAbstractItemView.

See also verticalOffset().

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

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

Reimplemented from QAbstractItemView.

### bool QTableView::isColumnHidden ( int column ) const

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

See also isRowHidden().

### bool QTableView::isRowHidden ( int row ) const

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

See also isColumnHidden().

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

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

Reimplemented from QAbstractItemView.

See also QAbstractItemView::CursorAction.

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

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

Reimplemented from QWidget.

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

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

### void QTableView::resizeColumnsToContents () `[slot]`

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

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

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

### void QTableView::resizeRowsToContents () `[slot]`

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

### int QTableView::rowAt ( int y ) const

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

See also columnAt().

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

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.

### int QTableView::rowHeight ( int row ) const

Returns the height of the given row.

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

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

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().

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

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().

### 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.

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

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

See also selectRow().

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

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

See also selectColumn().

### 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 vertical header to header.

See also horizontalHeader() and setVerticalHeader().

### 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().

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

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

Reimplemented from QAbstractItemView.

### void QTableView::setSpan ( int row, int column, int rowSpan, int columnSpan )

Sets the span of the table element at (row, column) to (rowSpan, columnSpan).

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 horizontal header to header.

See also verticalHeader() and setHorizontalHeader().

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

Show the given column.

See also hideColumn() and showRow().

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

Show the given row.

See also hideRow() and showColumn().

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

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 is only used when resizeColumnToContents() is called. In that case, if a larger column width is required by either the horizontal header or the item delegate, that width will be used instead.

Reimplemented from QAbstractItemView.

See also QWidget::sizeHint and horizontalHeader().

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

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.

Reimplemented from QAbstractItemView.

See also QWidget::sizeHint and verticalHeader().

### void QTableView::sortByColumn ( int column, Qt::SortOrder order )

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

This function was introduced in Qt 4.2.

See also sortingEnabled.

### QHeaderView * QTableView::verticalHeader () const

Returns the table view's vertical header.

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

### int QTableView::verticalOffset () const `[virtual protected]`

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.

Reimplemented from QAbstractItemView.

See also horizontalOffset().