QComboMenuDelegate Class Reference

#include <qcombobox_p.h>

Inheritance diagram for QComboMenuDelegate:

Public Functions
	QComboMenuDelegate (QObject *parent, QComboBox *cmb)
Public Functions inherited from QAbstractItemDelegate
virtual QWidget *	createEditor (QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index) const
	Returns the editor to be used for editing the data item with the given index. More...
virtual bool	editorEvent (QEvent *event, QAbstractItemModel *model, const QStyleOptionViewItem &option, const QModelIndex &index)
	When editing of an item starts, this function is called with the event that triggered the editing, the model, the index of the item, and the option used for rendering the item. More...
	QAbstractItemDelegate (QObject *parent=0)
	Creates a new abstract item delegate with the given parent. More...
virtual void	setEditorData (QWidget *editor, const QModelIndex &index) const
	Sets the contents of the given editor to the data for the item at the given index. More...
virtual void	setModelData (QWidget *editor, QAbstractItemModel *model, const QModelIndex &index) const
	Sets the data for the item at the given index in the model to the contents of the given editor. More...
virtual void	updateEditorGeometry (QWidget *editor, const QStyleOptionViewItem &option, const QModelIndex &index) const
	Updates the geometry of the editor for the item with the given index, according to the rectangle specified in the option. More...
virtual	~QAbstractItemDelegate ()
	Destroys the abstract item delegate. More...
Public Functions inherited from QObject
bool	blockSignals (bool b)
	If block is true, signals emitted by this object are blocked (i.e., emitting a signal will not invoke anything connected to it). More...
const QObjectList &	children () const
	Returns a list of child objects. More...
bool	connect (const QObject *sender, const char *signal, const char *member, Qt::ConnectionType type=Qt::AutoConnection) const
bool	disconnect (const char *signal=0, const QObject *receiver=0, const char *member=0)
bool	disconnect (const QObject *receiver, const char *member=0)
void	dumpObjectInfo ()
	Dumps information about signal connections, etc. More...
void	dumpObjectTree ()
	Dumps a tree of children to the debug output. More...
QList< QByteArray >	dynamicPropertyNames () const
	Returns the names of all properties that were dynamically added to the object using setProperty(). More...
virtual bool	event (QEvent *)
	This virtual function receives events to an object and should return true if the event e was recognized and processed. More...
virtual bool	eventFilter (QObject *, QEvent *)
	Filters events if this object has been installed as an event filter for the watched object. More...
template<typename T >
T	findChild (const QString &aName=QString()) const
	Returns the child of this object that can be cast into type T and that is called name, or 0 if there is no such object. More...
template<typename T >
QList< T >	findChildren (const QString &aName=QString()) const
	Returns all children of this object with the given name that can be cast to type T, or an empty list if there are no such objects. More...
template<typename T >
QList< T >	findChildren (const QRegExp &re) const
bool	inherits (const char *classname) const
	Returns true if this object is an instance of a class that inherits className or a QObject subclass that inherits className; otherwise returns false. More...
void	installEventFilter (QObject *)
	Installs an event filter filterObj on this object. More...
bool	isWidgetType () const
	Returns true if the object is a widget; otherwise returns false. More...
void	killTimer (int id)
	Kills the timer with timer identifier, id. More...
virtual const QMetaObject *	metaObject () const
	Returns a pointer to the meta-object of this object. More...
void	moveToThread (QThread *thread)
	Changes the thread affinity for this object and its children. More...
QString	objectName () const
QObject *	parent () const
	Returns a pointer to the parent object. More...
QVariant	property (const char *name) const
	Returns the value of the object's name property. More...
Q_INVOKABLE	QObject (QObject *parent=0)
	Constructs an object with parent object parent. More...
void	removeEventFilter (QObject *)
	Removes an event filter object obj from this object. More...
void	setObjectName (const QString &name)
void	setParent (QObject *)
	Makes the object a child of parent. More...
bool	setProperty (const char *name, const QVariant &value)
	Sets the value of the object's name property to value. More...
void	setUserData (uint id, QObjectUserData *data)
bool	signalsBlocked () const
	Returns true if signals are blocked; otherwise returns false. More...
int	startTimer (int interval)
	Starts a timer and returns a timer identifier, or returns zero if it could not start a timer. More...
QThread *	thread () const
	Returns the thread in which the object lives. More...
QObjectUserData *	userData (uint id) const
virtual	~QObject ()
	Destroys the object, deleting all its child objects. More...

Protected Functions
void	paint (QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const
	This pure abstract function must be reimplemented if you want to provide custom rendering. More...
QSize	sizeHint (const QStyleOptionViewItem &option, const QModelIndex &index) const
	This pure abstract function must be reimplemented if you want to provide custom rendering. More...
Protected Functions inherited from QAbstractItemDelegate
	QAbstractItemDelegate (QObjectPrivate &, QObject *parent=0)
	Creates a new abstract item delegate with the given parent. More...
Protected Functions inherited from QObject
virtual void	childEvent (QChildEvent *)
	This event handler can be reimplemented in a subclass to receive child events. More...
virtual void	connectNotify (const char *signal)
	This virtual function is called when something has been connected to signal in this object. More...
virtual void	customEvent (QEvent *)
	This event handler can be reimplemented in a subclass to receive custom events. More...
virtual void	disconnectNotify (const char *signal)
	This virtual function is called when something has been disconnected from signal in this object. More...
	QObject (QObjectPrivate &dd, QObject *parent=0)
int	receivers (const char *signal) const
	Returns the number of receivers connected to the signal. More...
QObject *	sender () const
	Returns a pointer to the object that sent the signal, if called in a slot activated by a signal; otherwise it returns 0. More...
int	senderSignalIndex () const
virtual void	timerEvent (QTimerEvent *)
	This event handler can be reimplemented in a subclass to receive timer events for the object. More...

Private Functions
QStyleOptionMenuItem	getStyleOption (const QStyleOptionViewItem &option, const QModelIndex &index) const

Properties
QComboBox *	mCombo

Additional Inherited Members
Public Types inherited from QAbstractItemDelegate
enum	EndEditHint {   NoHint, EditNextItem, EditPreviousItem, SubmitModelCache,   RevertModelCache }
	This enum describes the different hints that the delegate can give to the model and view components to make editing data in a model a comfortable experience for the user. More...
Public Slots inherited from QAbstractItemDelegate
bool	helpEvent (QHelpEvent *event, QAbstractItemView *view, const QStyleOptionViewItem &option, const QModelIndex &index)
	Whenever a help event occurs, this function is called with the event view option and the index that corresponds to the item where the event occurs. More...
Public Slots inherited from QObject
void	deleteLater ()
	Schedules this object for deletion. More...
Signals inherited from QAbstractItemDelegate
void	closeEditor (QWidget *editor, QAbstractItemDelegate::EndEditHint hint=NoHint)
	This signal is emitted when the user has finished editing an item using the specified editor. More...
void	commitData (QWidget *editor)
	This signal must be emitted when the editor widget has completed editing the data, and wants to write it back into the model. More...
void	sizeHintChanged (const QModelIndex &)
	This signal must be emitted when the sizeHint() of index changed. More...
Signals inherited from QObject
void	destroyed (QObject *=0)
	This signal is emitted immediately before the object obj is destroyed, and can not be blocked. More...
Static Public Functions inherited from QAbstractItemDelegate
static QString	elidedText (const QFontMetrics &fontMetrics, int width, Qt::TextElideMode mode, const QString &text)
	Use QFontMetrics::elidedText() instead. More...
Static Public Functions inherited from QObject
static bool	connect (const QObject *sender, const char *signal, const QObject *receiver, const char *member, Qt::ConnectionType=Qt::AutoConnection)
	Creates a connection of the given type from the signal in the sender object to the method in the receiver object. More...
static bool	connect (const QObject *sender, const QMetaMethod &signal, const QObject *receiver, const QMetaMethod &method, Qt::ConnectionType type=Qt::AutoConnection)
static bool	disconnect (const QObject *sender, const char *signal, const QObject *receiver, const char *member)
	Disconnects signal in object sender from method in object receiver. More...
static bool	disconnect (const QObject *sender, const QMetaMethod &signal, const QObject *receiver, const QMetaMethod &member)
static uint	registerUserData ()
static QString	tr (const char *sourceText, const char *comment=0, int n=-1)
static QString	trUtf8 (const char *sourceText, const char *comment=0, int n=-1)
Static Public Variables inherited from QObject
static const QMetaObject	staticMetaObject
	This variable stores the meta-object for the class. More...
Protected Variables inherited from QObject
QScopedPointer< QObjectData >	d_ptr
Static Protected Variables inherited from QObject
static const QMetaObject	staticQtMetaObject
Related Functions inherited from QObject
T	qFindChildqFindChildren (const QObject *obj, const QString &name)()
QList< T >	qFindChildrenqFindChildren (const QObject *obj, const QString &name)()
QList< T >	qFindChildrenqFindChildren (const QObject *obj, const QRegExp &regExp)()
T *	qobject_cast (QObject *object)
	QObjectList
void *	qt_find_obj_child (QObject *parent, const char *type, const QString &name)
	Returns a pointer to the object named name that inherits type and with a given parent. More...

Detailed Description

Definition at line 265 of file qcombobox_p.h.

Constructors and Destructors

QComboMenuDelegate()

QComboMenuDelegate::QComboMenuDelegate ( QObject *  parent, QComboBox *  cmb  )

inline

Definition at line 268 of file qcombobox_p.h.

: QAbstractItemDelegate(parent), mCombo(cmb) {}

Functions

getStyleOption()

QStyleOptionMenuItem QComboMenuDelegate::getStyleOption ( const QStyleOptionViewItem &  option, const QModelIndex &  index  ) const

private

Definition at line 115 of file qcombobox.cpp.

{
    QStyleOptionMenuItem menuOption;

    QPalette resolvedpalette = option.palette.resolve(QApplication::palette("QMenu"));
    QVariant value = index.data(Qt::ForegroundRole);
    if (value.canConvert<QBrush>()) {
        resolvedpalette.setBrush(QPalette::WindowText, qvariant_cast<QBrush>(value));
        resolvedpalette.setBrush(QPalette::ButtonText, qvariant_cast<QBrush>(value));
        resolvedpalette.setBrush(QPalette::Text, qvariant_cast<QBrush>(value));
    }
    menuOption.palette = resolvedpalette;
    menuOption.state = QStyle::State_None;
    if (mCombo->window()->isActiveWindow())
        menuOption.state = QStyle::State_Active;
    if ((option.state & QStyle::State_Enabled) && (index.model()->flags(index) & Qt::ItemIsEnabled))
        menuOption.state |= QStyle::State_Enabled;
    else
        menuOption.palette.setCurrentColorGroup(QPalette::Disabled);
    if (option.state & QStyle::State_Selected)
        menuOption.state |= QStyle::State_Selected;
    menuOption.checkType = QStyleOptionMenuItem::NonExclusive;
    menuOption.checked = mCombo->currentIndex() == index.row();
    if (QComboBoxDelegate::isSeparator(index))
        menuOption.menuItemType = QStyleOptionMenuItem::Separator;
    else
        menuOption.menuItemType = QStyleOptionMenuItem::Normal;

    QVariant variant = index.model()->data(index, Qt::DecorationRole);
    switch (variant.type()) {
    case QVariant::Icon:
        menuOption.icon = qvariant_cast<QIcon>(variant);
        break;
    case QVariant::Color: {
        static QPixmap pixmap(option.decorationSize);
        pixmap.fill(qvariant_cast<QColor>(variant));
        menuOption.icon = pixmap;
        break; }
    default:
        menuOption.icon = qvariant_cast<QPixmap>(variant);
        break;
    }
    if (index.data(Qt::BackgroundRole).canConvert<QBrush>()) {
        menuOption.palette.setBrush(QPalette::All, QPalette::Background,
                                    qvariant_cast<QBrush>(index.data(Qt::BackgroundRole)));
    }
    menuOption.text = index.model()->data(index, Qt::DisplayRole).toString()
                           .replace(QLatin1Char('&'), QLatin1String("&&"));
    menuOption.tabWidth = 0;
    menuOption.maxIconWidth =  option.decorationSize.width() + 4;
    menuOption.menuRect = option.rect;
    menuOption.rect = option.rect;

    // Make sure fonts set on the combo box also overrides the font for the popup menu.
    if (mCombo->testAttribute(Qt::WA_SetFont)
            || mCombo->testAttribute(Qt::WA_MacSmallSize)
            || mCombo->testAttribute(Qt::WA_MacMiniSize)
            || mCombo->font() != qt_app_fonts_hash()->value("QComboBox", QFont()))
        menuOption.font = mCombo->font();
    else
        menuOption.font = qt_app_fonts_hash()->value("QComboMenuItem", mCombo->font());

    menuOption.fontMetrics = QFontMetrics(menuOption.font);

    return menuOption;
}

paint()

void QComboMenuDelegate::paint ( QPainter *  painter, const QStyleOptionViewItem &  option, const QModelIndex &  index  ) const

inlineprotectedvirtual

This pure abstract function must be reimplemented if you want to provide custom rendering.

Use the painter and style option to render the item specified by the item index.

If you reimplement this you must also reimplement sizeHint().

Implements QAbstractItemDelegate.

Definition at line 271 of file qcombobox_p.h.

                                               {
        QStyleOptionMenuItem opt = getStyleOption(option, index);
#ifndef Q_WS_S60
        painter->fillRect(option.rect, opt.palette.background());
#endif
        mCombo->style()->drawControl(QStyle::CE_MenuItem, &opt, painter, mCombo);
    }

sizeHint()

QSize QComboMenuDelegate::sizeHint ( const QStyleOptionViewItem &  option, const QModelIndex &  index  ) const

inlineprotectedvirtual

This pure abstract function must be reimplemented if you want to provide custom rendering.

The options are specified by option and the model item by index.

If you reimplement this you must also reimplement paint().

Implements QAbstractItemDelegate.

Definition at line 280 of file qcombobox_p.h.

                                                   {
        QStyleOptionMenuItem opt = getStyleOption(option, index);
        return mCombo->style()->sizeFromContents(
            QStyle::CT_MenuItem, &opt, option.rect.size(), mCombo);
    }

Properties

mCombo

QComboBox* QComboMenuDelegate::mCombo

private

Definition at line 290 of file qcombobox_p.h.

---

The documentation for this class was generated from the following files:

• /src/gui/widgets/qcombobox_p.h
• /src/gui/widgets/qcombobox.cpp