The QListWidgetItem class provides an item for use with the QListWidget item view class. More...
| Header: | #include <QListWidgetItem> |
| qmake: | QT += widgets |
| enum | ItemType { Type, UserType } |
| QListWidgetItem(QListWidget *parent = nullptr, int type = Type) | |
| QListWidgetItem(const QString &text, QListWidget *parent = nullptr, int type = Type) | |
| QListWidgetItem(const QIcon &icon, const QString &text, QListWidget *parent = nullptr, int type = Type) | |
| QListWidgetItem(const QListWidgetItem &other) | |
| virtual | ~QListWidgetItem() |
| QBrush | background() const |
| Qt::CheckState | checkState() const |
| virtual QListWidgetItem * | clone() const |
| virtual QVariant | data(int role) const |
| Qt::ItemFlags | flags() const |
| QFont | font() const |
| QBrush | foreground() const |
| QIcon | icon() const |
| bool | isHidden() const |
| bool | isSelected() const |
| QListWidget * | listWidget() const |
| virtual void | read(QDataStream &in) |
| void | setBackground(const QBrush &brush) |
| void | setCheckState(Qt::CheckState state) |
| virtual void | setData(int role, const QVariant &value) |
| void | setFlags(Qt::ItemFlags flags) |
| void | setFont(const QFont &font) |
| void | setForeground(const QBrush &brush) |
| void | setHidden(bool hide) |
| void | setIcon(const QIcon &icon) |
| void | setSelected(bool select) |
| void | setSizeHint(const QSize &size) |
| void | setStatusTip(const QString &statusTip) |
| void | setText(const QString &text) |
| void | setTextAlignment(int alignment) |
| void | setToolTip(const QString &toolTip) |
| void | setWhatsThis(const QString &whatsThis) |
| QSize | sizeHint() const |
| QString | statusTip() const |
| QString | text() const |
| int | textAlignment() const |
| QString | toolTip() const |
| int | type() const |
| QString | whatsThis() const |
| virtual void | write(QDataStream &out) const |
| virtual bool | operator<(const QListWidgetItem &other) const |
| QListWidgetItem & | operator=(const QListWidgetItem &other) |
| QDataStream & | operator<<(QDataStream &out, const QListWidgetItem &item) |
| QDataStream & | operator>>(QDataStream &in, QListWidgetItem &item) |
The QListWidgetItem class provides an item for use with the QListWidget item view class.
A QListWidgetItem represents a single item in a QListWidget. Each item can hold several pieces of information, and will display them appropriately.
The item view convenience classes use a classic item-based interface rather than a pure model/view approach. For a more flexible list view widget, consider using the QListView class with a standard model.
List items can be inserted automatically into a list, when they are constructed, by specifying the list widget:
new QListWidgetItem(tr("Hazel"), listWidget);
Alternatively, list items can also be created without a parent widget, and later inserted into a list using QListWidget::insertItem().
List items are typically used to display text() and an icon(). These are set with the setText() and setIcon() functions. The appearance of the text can be customized with setFont(), setForeground(), and setBackground(). Text in list items can be aligned using the setTextAlignment() function. Tooltips, status tips and "What's This?" help can be added to list items with setToolTip(), setStatusTip(), and setWhatsThis().
By default, items are enabled, selectable, checkable, and can be the source of drag and drop operations.
Each item's flags can be changed by calling setFlags() with the appropriate value (see Qt::ItemFlags). Checkable items can be checked, unchecked and partially checked with the setCheckState() function. The corresponding checkState() function indicates the item's current check state.
The isHidden() function can be used to determine whether the item is hidden. To hide an item, use setHidden().
When subclassing QListWidgetItem to provide custom items, it is possible to define new types for them enabling them to be distinguished from standard items. For subclasses that require this feature, ensure that you call the base class constructor with a new type value equal to or greater than UserType, within your constructor.
See also QListWidget, Model/View Programming, QTreeWidgetItem, and QTableWidgetItem.
This enum describes the types that are used to describe list widget items.
| Constant | Value | Description |
|---|---|---|
QListWidgetItem::Type |
0 |
The default type for list widget items. |
QListWidgetItem::UserType |
1000 |
The minimum value for custom types. Values below UserType are reserved by Qt. |
You can define new user types in QListWidgetItem subclasses to ensure that custom items are treated specially.
See also type().
Constructs an empty list widget item of the specified type with the given parent. If parent is not specified, the item will need to be inserted into a list widget with QListWidget::insertItem().
This constructor inserts the item into the model of the parent that is passed to the constructor. If the model is sorted then the behavior of the insert is undetermined since the model will call the '<'
operator method on the item which, at this point, is not yet constructed. To avoid the undetermined behavior, we recommend not to specify the parent and use QListWidget::insertItem() instead.
See also type().
Constructs an empty list widget item of the specified type with the given text and parent. If the parent is not specified, the item will need to be inserted into a list widget with QListWidget::insertItem().
This constructor inserts the item into the model of the parent that is passed to the constructor. If the model is sorted then the behavior of the insert is undetermined since the model will call the '<'
operator method on the item which, at this point, is not yet constructed. To avoid the undetermined behavior, we recommend not to specify the parent and use QListWidget::insertItem() instead.
See also type().
Constructs an empty list widget item of the specified type with the given icon, text and parent. If the parent is not specified, the item will need to be inserted into a list widget with QListWidget::insertItem().
This constructor inserts the item into the model of the parent that is passed to the constructor. If the model is sorted then the behavior of the insert is undetermined since the model will call the '<'
operator method on the item which, at this point, is not yet constructed. To avoid the undetermined behavior, we recommend not to specify the parent and use QListWidget::insertItem() instead.
See also type().
Constructs a copy of other. Note that type() and listWidget() are not copied.
This function is useful when reimplementing clone().
This function was introduced in Qt 4.1.
[virtual] QListWidgetItem::~QListWidgetItem()Destroys the list item.
Returns the brush used to display the list item's background.
This function was introduced in Qt 4.2.
See also setBackground() and foreground().
Returns the checked state of the list item (see Qt::CheckState).
See also setCheckState() and flags().
[virtual] QListWidgetItem *QListWidgetItem::clone() constCreates an exact copy of the item.
[virtual] QVariant QListWidgetItem::data(int
role) constReturns the item's data for a given role. Reimplement this function if you need extra roles or special behavior for certain roles.
See also Qt::ItemDataRole and setData().
Returns the item flags for this item (see Qt::ItemFlags).
See also setFlags().
Returns the font used to display this list item's text.
See also setFont().
Returns the brush used to display the list item's foreground (e.g. text).
This function was introduced in Qt 4.2.
See also setForeground() and background().
Returns the list item's icon.
See also setIcon() and iconSize.
Returns true if the item is hidden; otherwise returns false.
This function was introduced in Qt 4.2.
See also setHidden().
Returns true if the item is selected; otherwise returns false.
This function was introduced in Qt 4.2.
See also setSelected().
Returns the list widget containing the item.
[virtual] void QListWidgetItem::read(QDataStream &in)Reads the item from stream in.
See also write().
Sets the background brush of the list item to the given brush.
This function was introduced in Qt 4.2.
See also background() and setForeground().
Sets the check state of the list item to state.
See also checkState().
[virtual] void QListWidgetItem::setData(int role, const
QVariant &value)Sets the data for a given role to the given value. Reimplement this function if you need extra roles or special behavior for certain roles.
Note: The default implementation treats Qt::EditRole and Qt::DisplayRole as referring to the same data.
See also Qt::ItemDataRole and data().
Sets the item flags for the list item to flags.
See also flags() and Qt::ItemFlags.
Sets the font used when painting the item to the given font.
See also font().
Sets the foreground brush of the list item to the given brush.
This function was introduced in Qt 4.2.
See also foreground() and setBackground().
Hides the item if hide is true; otherwise shows the item.
This function was introduced in Qt 4.2.
See also isHidden().
Sets the icon for the list item to the given icon.
See also icon(), text(), and iconSize.
Sets the selected state of the item to select.
This function was introduced in Qt 4.2.
See also isSelected().
Sets the size hint for the list item to be size. If no size hint is set, the item delegate will compute the size hint based on the item data.
This function was introduced in Qt 4.1.
See also sizeHint().
Sets the status tip for the list item to the text specified by statusTip. QListWidget mouseTracking needs to be enabled for this feature to work.
See also statusTip(), setToolTip(), setWhatsThis(), and QWidget::setMouseTracking().
Sets the text for the list widget item's to the given text.
See also text().
Sets the list item's text alignment to alignment.
See also textAlignment() and Qt::AlignmentFlag.
Sets the tooltip for the list item to the text specified by toolTip.
See also toolTip(), setStatusTip(), and setWhatsThis().
Sets the "What's This?" help for the list item to the text specified by whatsThis.
See also whatsThis(), setStatusTip(), and setToolTip().
Returns the size hint set for the list item.
This function was introduced in Qt 4.1.
See also setSizeHint().
Returns the list item's status tip.
See also setStatusTip().
Returns the list item's text.
See also setText().
Returns the text alignment for the list item.
See also setTextAlignment() and Qt::AlignmentFlag.
Returns the list item's tooltip.
See also setToolTip(), statusTip(), and whatsThis().
Returns the type passed to the QListWidgetItem constructor.
Returns the list item's "What's This?" help text.
See also setWhatsThis(), statusTip(), and toolTip().
[virtual] void QListWidgetItem::write(QDataStream &out) constWrites the item to stream out.
See also read().
[virtual] bool QListWidgetItem::operator<(const QListWidgetItem &other) constReturns true if this item's text is less then other item's text; otherwise returns false.
Assigns other's data and flags to this item. Note that type() and listWidget() are not copied.
This function is useful when reimplementing clone().
Writes the list widget item item to stream out.
This operator uses QListWidgetItem::write().
See also Serializing Qt Data Types.
Reads a list widget item from stream in into item.
This operator uses QListWidgetItem::read().
See also Serializing Qt Data Types.
