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# QListView Class Reference

The QListView class provides a default model/view implementation of a list, and of an icon view. More...

    #include <QListView>

Part of the QtGui module.

Inherits QAbstractItemView.

Inherited by QListWidget.

- List of all members, including inherited members

### Public Types

- enum Flow { LeftToRight, TopToBottom }
- enum LayoutMode { SinglePass, Batched }
- enum Movement { Static, Free, Snap }
- enum ResizeMode { Fixed, Adjust }
- enum ViewMode { ListMode, IconMode }

### Properties

- column : int
- flow : Flow
- gridSize : QSize
- isWrapping : bool
- layoutMode : LayoutMode

- movement : Movement
- resizeMode : ResizeMode
- spacing : int
- viewMode : ViewMode

- 11 properties inherited from QAbstractItemView
- 2 properties inherited from QAbstractScrollArea
- 6 properties inherited from QFrame
- 51 properties inherited from QWidget
- 1 property inherited from QObject

### Public Functions

- QListView ( QWidget * parent = 0 )
- ~QListView ()
- void clearPropertyFlags ()
- int column () const
- Flow flow () const
- QSize gridSize () const
- bool isRowHidden ( int row ) const
- bool isWrapping () const
- LayoutMode layoutMode () const
- Movement movement () const
- ResizeMode resizeMode () const
- void setColumn ( int column )
- void setFlow ( Flow flow )
- void setGridSize ( const QSize & size )
- void setLayoutMode ( LayoutMode mode )
- void setMovement ( Movement movement )
- void setResizeMode ( ResizeMode mode )
- void setRowHidden ( int row, bool hide )
- void setSpacing ( int space )
- void setViewMode ( ViewMode mode )
- void setWrapping ( bool enable )
- int spacing () const
- ViewMode viewMode () const

- 39 public functions inherited from QAbstractItemView
- 8 public functions inherited from QAbstractScrollArea
- 13 public functions inherited from QFrame
- 182 public functions inherited from QWidget
- 28 public functions inherited from QObject
- 11 public functions inherited from QPaintDevice

### Protected Functions

- void internalDrag ( Qt::DropActions supportedActions )
- void internalDrop ( QDropEvent * e )
- QRect rectForIndex ( const QModelIndex & index ) const

- 31 protected functions inherited from QAbstractItemView
- 17 protected functions inherited from QAbstractScrollArea
- 37 protected functions inherited from QWidget
- 7 protected functions inherited from QObject

### Additional Inherited Members

- 6 public slots inherited from QAbstractItemView
- 17 public slots inherited from QWidget
- 1 public slot inherited from QObject
- 6 signals inherited from QAbstractItemView
- 1 signal inherited from QWidget
- 1 signal inherited from QObject
- 4 static public members inherited from QWidget
- 4 static public members inherited from QObject
- 8 protected slots inherited from QAbstractItemView

## Detailed Description

The QListView class provides a default model/view implementation of a list, and of an icon view.

A QListView presents items stored in a model, either as a simple non-hierarchical list, or as a collection of icons. This class is used to provide lists and icon views that were previously provided by the `QListBox` and `QIconView` classes, but using the more flexible approach provided by Qt's model/view architecture.

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

Items in a list view can be displayed using one of two view modes: In `ListMode`, the items are displayed in the form of a simple list; in `IconMode`, the list view takes the form of an icon view in which the items are displayed with icons like files in a file manager. By default, the list view is in `ListMode`. To change the view mode, use the setViewMode() function, and to determine the current view mode, use viewMode().

Items in these views are laid out in the direction specified by the flow() of the list view. The items may be fixed in place, or allowed to move, depending on the view's movement() state.

If the items in the model cannot be completely laid out in the direction of flow, they can be wrapped at the boundary of the view widget; this depends on isWrapping(). This property is useful when the items are being represented by an icon view.

The resizeMode() and layoutMode() govern how and when the items are laid out. Items are spaced according to their spacing(), and can exist within a notional grid of size specified by gridSize(). The items can be rendered as large or small icons depending on their iconSize().

See also Model/View Programming.

## Member Type Documentation

### enum QListView::Flow

Constant | Value | Description
--- | --- | ---
`QListView::LeftToRight` | `0` | The items are laid out in the view from the left to the right.
`QListView::TopToBottom` | `1` | The items are laid out in the view from the top to the bottom.

### enum QListView::LayoutMode

Constant | Value | Description
--- | --- | ---
`QListView::SinglePass` | `0` | The items are laid out all at once.
`QListView::Batched` | `1` | The items are laid out in batches of 100 items.

### enum QListView::Movement

Constant | Value | Description
--- | --- | ---
`QListView::Static` | `0` | The items cannot be moved by the user.
`QListView::Free` | `1` | The items can be moved freely by the user.
`QListView::Snap` | `2` | The items snap to the specified grid when moved; see setGridSize().

### enum QListView::ResizeMode

Constant | Value | Description
--- | --- | ---
`QListView::Fixed` | `0` | The items will only be laid out the first time the view is shown.
`QListView::Adjust` | `1` | The items will be laid out every time the view is resized.

### enum QListView::ViewMode

Constant | Value | Description
--- | --- | ---
`QListView::ListMode` | `0` | The items are layed out using TopToBottom flow, with Small size and Static movement
`QListView::IconMode` | `1` | The items are layed out using LeftToRight flow, with Large size and Free movement

## Property Documentation

### column : int

This property holds the column in the model that is visible.

Access functions:

- int column () const
- void setColumn ( int column )

### flow : Flow

This property holds which direction the items layout should flow.

If this property is `LeftToRight`, the items will be laid out left to right. If the isWrapping property is true, the layout will wrap when it reaches the right side of the visible area. If this property is `TopToBottom`, the items will be laid out from the top of the visible area, wrapping when it reaches the bottom.

Setting this property when the view is visible will cause the items to be laid out again.

Access functions:

- Flow flow () const
- void setFlow ( Flow flow )

### gridSize : QSize

This property holds the size of the layout grid.

This property is the size of the grid in which the items are laid out. The default is an empty size which means that there is no grid and the layout is not done in a grid. Setting this property to a non-empty size switches on the grid layout. (When a grid layout is in force the spacing property is ignored.)

Setting this property when the view is visible will cause the items to be laid out again.

Access functions:

- QSize gridSize () const
- void setGridSize ( const QSize & size )

### isWrapping : bool

This property holds whether the items layout should wrap.

This property holds whether the layout should wrap when there is no more space in the visible area. The point at which the layout wraps depends on the flow property.

Setting this property when the view is visible will cause the items to be laid out again.

Access functions:

- bool isWrapping () const
- void setWrapping ( bool enable )

### layoutMode : LayoutMode

This property holds whether the layout of items should happen immediately or be delayed.

This property holds the layout mode for the items. When the mode is `Instant` (the default), the items are laid out all in one go. When the mode is `Batched`, the items are laid out in batches of 100 items, while processing events. This makes it possible to instantly view and interact with the visible items while the rest are being laid out.

Access functions:

- LayoutMode layoutMode () const
- void setLayoutMode ( LayoutMode mode )

### movement : Movement

This property holds whether the items can be moved freely, are snapped to a grid, or cannot be moved at all.

This property determines how the user can move the items in the view. `Static` means that the items can't be moved the user. `Free` means that the user can drag and drop the items to any position in the view. `Snap` means that the user can drag and drop the items, but only to the positions in a notional grid signified by the gridSize property.

Setting this property when the view is visible will cause the items to be laid out again.

Access functions:

- Movement movement () const
- void setMovement ( Movement movement )

See also gridSize.

### resizeMode : ResizeMode

This property holds whether the items are laid out again when the view is resized.

If this property is `Adjust`, the items will be laid out again when the view is resized. If the value is `Fixed`, the items will not be laid out when the view is resized.

Access functions:

- ResizeMode resizeMode () const
- void setResizeMode ( ResizeMode mode )

### spacing : int

This property holds the space between items in the layout.

This property is the size of the empty space between items in the layout. This property is ignored if the items are laid out in a grid.

Setting this property when the view is visible will cause the items to be laid out again.

Access functions:

- int spacing () const
- void setSpacing ( int space )

### viewMode : ViewMode

This property holds the view mode of the .

This property will change the other unset properties to conform with the set view mode. Properties that have already been set will not be changed, unless clearPropertyFlags() has been called.

Access functions:

- ViewMode viewMode () const
- void setViewMode ( ViewMode mode )

## Member Function Documentation

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

Creates a new QListView with the given parent to view a model. Use setModel() to set the model.

### QListView::~QListView ()

Destroys the view.

### void QListView::clearPropertyFlags ()

Clears the property flags. See viewMode.

### void QListView::internalDrag ( Qt::DropActions supportedActions ) `[protected]`

Called whenever the user starts dragging items and the items are movable, enabling internal dragging and dropping of items.

### void QListView::internalDrop ( QDropEvent * e ) `[protected]`

Called whenever items from the view is dropped on the viewport.

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

Returns true if the row is hidden, otherwise returns false.

### QRect QListView::rectForIndex ( const QModelIndex & index ) const `[protected]`

Returns the rectangle of the item at position index in the model. The rectangle is in contents coordinates.

### void QListView::setRowHidden ( int row, bool hide )

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