Qyoto
4.0.6
Qyoto is a C# language binding for Qt
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The QAbstractItemDelegate class is used to display and edit data items from a model. More...
Public Types | |
enum | EndEditHint { EditNextItem = 1, EditPreviousItem = 2, NoHint = 0, RevertModelCache = 4, SubmitModelCache = 3 } |
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Public Member Functions | |
QAbstractItemDelegate (QObject parent=null) | |
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override void | CreateProxy () |
virtual QWidget | CreateEditor (QWidget parent, QStyleOptionViewItem option, QModelIndex index) |
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virtual bool | OnEditorEvent (QEvent @event, QAbstractItemModel model, QStyleOptionViewItem option, QModelIndex index) |
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new bool | OnHelpEvent (QHelpEvent @event, QAbstractItemView view, QStyleOptionViewItem option, QModelIndex index) |
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abstract void | Paint (QPainter painter, QStyleOptionViewItem option, QModelIndex index) |
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virtual void | SetEditorData (QWidget editor, QModelIndex index) |
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virtual void | SetModelData (QWidget editor, QAbstractItemModel model, QModelIndex index) |
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abstract QSize | SizeHint (QStyleOptionViewItem option, QModelIndex index) |
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virtual void | UpdateEditorGeometry (QWidget editor, QStyleOptionViewItem option, QModelIndex index) |
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new void | Dispose () |
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QObject (QObject parent=null) | |
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new bool | BlockSignals (bool b) |
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new bool | Connect (QObject sender, string signal, string member, Qt.ConnectionType type=Qt.ConnectionType.AutoConnection) |
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new void | DeleteLater () |
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new bool | Disconnect (QObject receiver, string member=null) |
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new bool | Disconnect (string signal=null, QObject receiver=null, string member=null) |
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new void | DumpObjectInfo () |
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new void | DumpObjectTree () |
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virtual bool | OnEvent (QEvent e) |
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virtual bool | EventFilter (QObject watched, QEvent @event) |
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new bool | Inherits (string classname) |
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new void | InstallEventFilter (QObject filterObj) |
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new void | KillTimer (int id) |
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new object | Property (string name) |
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new void | RemoveEventFilter (QObject obj) |
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new bool | SetProperty (string name, object value) |
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new void | SetUserData (uint id, QObjectUserData data) |
new int | StartTimer (int interval) |
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new QObjectUserData | UserData (uint id) |
new void | Dispose () |
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delegate QTextStream | FuncQTextStreamQTextStream (QTextStream qTextStream) |
delegate void | ActionQtMsgTypeString (QtMsgType qtMsgType, string @string) |
delegate QObject | FuncQObject () |
delegate string | FuncStringQByteArray (QByteArray qByteArray) |
delegate QByteArray | FuncQByteArrayString (string @string) |
Static Public Member Functions | |
static string | ElidedText (QFontMetrics fontMetrics, int width, Qt.TextElideMode mode, string text) |
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static string | Tr (string s, string c=null) |
static string | Tr (string s, string c, int n) |
static string | TrUtf8 (string s, string c=null) |
static string | TrUtf8 (string s, string c, int n) |
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static bool | Connect (QObject sender, QMetaMethod signal, QObject receiver, QMetaMethod method, Qt.ConnectionType type=Qt.ConnectionType.AutoConnection) |
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static bool | Connect (QObject sender, string signal, QObject receiver, string member, Qt.ConnectionType type=Qt.ConnectionType.AutoConnection) |
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static bool | Disconnect (QObject sender, QMetaMethod signal, QObject receiver, QMetaMethod member) |
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static bool | Disconnect (QObject sender, string signal, QObject receiver, string member) |
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static string | Tr (string s, string c=null) |
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static string | Tr (string s, string c, int n) |
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static string | TrUtf8 (string s, string c=null) |
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static string | TrUtf8 (string s, string c, int n) |
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static QDataStream | Write (QDataStream s, object p) |
static QDataStream | Write (QDataStream stream, QSizeF size) |
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static QDataStream | Write (QDataStream stream, QPoint point) |
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static QTextStream | Write (QTextStream s, Qt.FuncQTextStreamQTextStream f) |
static QDataStream | Write (QDataStream stream, QLineF line) |
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static QDataStream | Write (QDataStream stream, QPointF point) |
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static QDataStream | Write (QDataStream @out, QChar chr) |
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static QDataStream | Write (QDataStream @out, QByteArray ba) |
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static QDataStream | Write (QDataStream stream, QEasingCurve easing) |
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static QDataStream | Write (QDataStream stream, QRectF rectangle) |
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static QDataStream | Write (QDataStream @out, QDateTime dateTime) |
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static QDataStream | Write (QDataStream @out, QUrl url) |
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static QDataStream | Write (QDataStream @out, QTime time) |
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static QDataStream | Write (QDataStream arg1, QLocale arg2) |
static QDataStream | Write (QDataStream @out, QBitArray ba) |
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static QDataStream | Write (QDataStream s, QUuid id) |
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static QDataStream | Write (QDataStream stream, QLine line) |
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static QDataStream | Write (QDataStream @out, QDate date) |
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static QDataStream | Write (QDataStream @out, QRegExp regExp) |
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static QDataStream | Write (QDataStream stream, QRect rectangle) |
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static QDataStream | Write (QDataStream stream, QSize size) |
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static QDataStream | Write (QDataStream s, QVariant.Type p) |
static QDataStream | Write (QDataStream arg1, string arg2) |
static QDataStream | Write (QDataStream @out, System.Collections.Generic.List< string > list) |
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static QDataStream | Read (QDataStream @in, QChar chr) |
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static QDataStream | Read (QDataStream arg1, QLocale arg2) |
static QDataStream | Read (QDataStream stream, QRect rectangle) |
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static QDataStream | Read (QDataStream arg1, QEasingCurve arg2) |
static QDataStream | Read (QDataStream @in, QDate date) |
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static QDataStream | Read (QDataStream @in, QUrl url) |
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static QDataStream | Read (QDataStream s, QUuid id) |
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static QTextStream | Read (QTextStream s, Qt.FuncQTextStreamQTextStream f) |
static QDataStream | Read (QDataStream stream, QLineF line) |
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static QDataStream | Read (QDataStream stream, QRectF rectangle) |
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static QDataStream | Read (QDataStream stream, QPointF point) |
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static QDataStream | Read (QDataStream stream, QLine line) |
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static QDataStream | Read (QDataStream @in, QBitArray ba) |
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static QDataStream | Read (QDataStream stream, QSize size) |
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static QDataStream | Read (QDataStream @in, QDateTime dateTime) |
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static QDataStream | Read (QDataStream @in, QTime time) |
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static QDataStream | Read (QDataStream stream, QPoint point) |
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static QDataStream | Read (QDataStream @in, QRegExp regExp) |
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static QDataStream | Read (QDataStream s, object p) |
static QDataStream | Read (QDataStream @in, QByteArray ba) |
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static QDataStream | Read (QDataStream stream, QSizeF size) |
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static QDataStream | Read (QDataStream arg1, string arg2) |
static QDataStream | Read (QDataStream s, QVariant.Type p) |
static QDataStream | Read (QDataStream @in, System.Collections.Generic.List< string > list) |
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static double | QAcos (double v) |
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static void | QAddPostRoutine (System.Action ptr) |
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static double | QAsin (double v) |
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static double | QAtan (double v) |
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static double | QAtan2 (double x, double y) |
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static void | QBadAlloc () |
static int | QCeil (double v) |
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static ushort | QChecksum (string s, uint len) |
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static QByteArray | QCompress (QByteArray data, int compressionLevel=-1) |
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static QByteArray | QCompress (Pointer< byte > data, int nbytes, int compressionLevel=-1) |
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static double | QCos (double v) |
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static double | QExp (double v) |
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static double | QFabs (double v) |
static double | QFastCos (double x) |
static double | QFastSin (double x) |
static string | QFlagLocation (string method) |
static int | QFloor (double v) |
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static bool | QFuzzyCompare (double p1, double p2) |
static bool | QFuzzyCompare (float p1, float p2) |
static bool | QFuzzyIsNull (double d) |
static bool | QFuzzyIsNull (float f) |
static uint | QHash (QBitArray key) |
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static uint | QHash (QChar key) |
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static uint | QHash (QStringRef key) |
static uint | QHash (QUrl url) |
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static uint | QHash (QPersistentModelIndex index) |
static uint | QHash (QByteArray key) |
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static uint | QHash (QModelIndex index) |
static uint | QHash (uint key) |
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static uint | QHash (char key) |
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static uint | QHash (byte key) |
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static uint | QHash (short key) |
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static uint | QHash (NativeLong key) |
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static uint | QHash (ushort key) |
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static uint | QHash (long key) |
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static uint | QHash (ulong key) |
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static uint | QHash (int key) |
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static uint | QHash (string key) |
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static uint | QHash (NativeULong key) |
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static Qt.ActionQtMsgTypeString | QInstallMsgHandler (Qt.ActionQtMsgTypeString arg1) |
static int | QIntCast (float f) |
static int | QIntCast (double f) |
static bool | QIsFinite (double d) |
static bool | QIsFinite (float f) |
static bool | QIsInf (float f) |
static bool | QIsInf (double d) |
static bool | QIsNaN (float f) |
static bool | QIsNaN (double d) |
static bool | QIsNull (float f) |
static bool | QIsNull (double d) |
static double | QLn (double v) |
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static double | QPow (double x, double y) |
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static void | QRegisterStaticPluginInstanceFunction (Qt.FuncQObject function) |
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static void | QRemovePostRoutine (System.Action arg1) |
static int | QRound (double d) |
static long | QRound64 (double d) |
static double | QSin (double v) |
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static double | QSqrt (double v) |
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static bool | QStringComparisonHelper (QStringRef s1, string s2) |
static double | QTan (double v) |
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static QByteArray | QUncompress (QByteArray data) |
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static QByteArray | QUncompress (Pointer< byte > data, int nbytes) |
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static void | Qbswap_helper (Pointer< byte > src, Pointer< byte > dest, int size) |
static QByteArray | Qgetenv (string varName) |
static bool | Qputenv (string varName, QByteArray value) |
static void | Qsrand (uint seed) |
static int | Qstrcmp (QByteArray str1, QByteArray str2) |
static int | Qstrcmp (QByteArray str1, string str2) |
static int | Qstrcmp (string str1, QByteArray str2) |
static int | Qstrcmp (string str1, string str2) |
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static Pointer< sbyte > | Qstrcpy (Pointer< sbyte > dst, string src) |
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static Pointer< sbyte > | Qstrdup (string src) |
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static int | Qstricmp (string str1, string str2) |
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static uint | Qstrlen (string str) |
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static int | Qstrncmp (string str1, string str2, uint len) |
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static Pointer< sbyte > | Qstrncpy (Pointer< sbyte > dst, string src, uint len) |
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static int | Qstrnicmp (string str1, string str2, uint len) |
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static uint | Qstrnlen (string str, uint maxlen) |
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static string | QtTrId (string id, int n=-1) |
Protected Member Functions | |
QAbstractItemDelegate (System.Type dummy) | |
new void | OnCloseEditor (QWidget editor, QAbstractItemDelegate.EndEditHint hint=QAbstractItemDelegate.EndEditHint.NoHint) |
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new void | OnCommitData (QWidget editor) |
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new void | OnSizeHintChanged (QModelIndex index) |
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QObject (System.Type dummy) | |
virtual void | OnChildEvent (QChildEvent @event) |
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virtual void | ConnectNotify (string signal) |
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virtual void | OnCustomEvent (QEvent @event) |
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new void | OnDestroyed (QObject obj=null) |
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virtual void | DisconnectNotify (string signal) |
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new int | Receivers (string signal) |
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virtual void | OnTimerEvent (QTimerEvent @event) |
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Properties | |
Slot< QWidget > | CommitData |
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Slot< QWidget, QAbstractItemDelegate.EndEditHint > | CloseEditor |
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Slot< QWidget > | CloseEditorEditor |
Slot< QModelIndex > | SizeHintChanged |
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static new QMetaObject | StaticMetaObject [get] |
new IQAbstractItemDelegateSignals | Emit [get] |
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virtual EventHandler < QEventArgs< QChildEvent > > | ChildEvent |
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virtual EventHandler < QEventArgs< QEvent > > | CustomEvent |
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virtual EventHandler < QEventArgs< QEvent > > | Event |
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virtual EventHandler < QEventArgs< QTimerEvent > > | TimerEvent |
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Slot< QObject > | DestroyedQObject |
Slot | Destroyed |
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QObject | Parent [get, set] |
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System.Collections.Generic.List < QObject > | Children [get] |
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System.Collections.Generic.List < QByteArray > | DynamicPropertyNames [get] |
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bool | IsWidgetType [get] |
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static uint | RegisterUserData [get] |
QObject | Sender [get] |
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int | SenderSignalIndex [get] |
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bool | SignalsBlocked [get] |
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virtual System.IntPtr | SmokeObject [get, set] |
new string | ObjectName [get, set] |
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static new QMetaObject | StaticMetaObject [get] |
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static new QMetaObject | StaticQtMetaObject [get] |
new IQObjectSignals | Emit [get] |
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static string | QAppName [get] |
static double | QInf [get] |
static double | QQNaN [get] |
static double | QSNaN [get] |
static bool | QSharedBuild [get] |
static string | QVersion [get] |
static int | Qrand [get] |
Additional Inherited Members | |
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object | Q_EMIT = null |
SmokeInvocation | interceptor |
readonly List< QEventHandler > | eventFilters = new List<QEventHandler>() |
The QAbstractItemDelegate class is used to display and edit data items from a model.
A QAbstractItemDelegate provides the interface and common functionality for delegates in the model/view architecture. Delegates display individual items in views, and handle the editing of model data.
The QAbstractItemDelegate class is one of the Model/View Classes and is part of Qt's model/view framework.
To render an item in a custom way, you must implement paint() and sizeHint(). The QItemDelegate class provides default implementations for these functions; if you do not need custom rendering, subclass that class instead.
We give an example of drawing a progress bar in items; in our case for a package management program.
We create the WidgetDelegate class, which inherits from QStyledItemDelegate. We do the drawing in the paint() function:
void WidgetDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option,
const QModelIndex &index) const
{
if (index.column() == 1) {
int progress = index.data().toInt();
QStyleOptionProgressBar progressBarOption;
progressBarOption.rect = option.rect;
progressBarOption.minimum = 0;
progressBarOption.maximum = 100;
progressBarOption.progress = progress;
progressBarOption.text = QString::number(progress) + "%";
progressBarOption.textVisible = true;
QApplication::style()->drawControl(QStyle::CE_ProgressBar,
&progressBarOption, painter);
} else
QStyledItemDelegate::paint(painter, option, index);
Notice that we use a QStyleOptionProgressBar and initialize its members. We can then use the current QStyle to draw it.
To provide custom editing, there are two approaches that can be used. The first approach is to create an editor widget and display it directly on top of the item. To do this you must reimplement createEditor() to provide an editor widget, setEditorData() to populate the editor with the data from the model, and setModelData() so that the delegate can update the model with data from the editor.
The second approach is to handle user events directly by reimplementing editorEvent().
See also Model/View Programming, QItemDelegate, Pixelator Example, QStyledItemDelegate, and QStyle.
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.
These hints let the delegate influence the behavior of the view:
Note that custom views may interpret the concepts of next and previous differently.
The following hints are most useful when models are used that cache data, such as those that manipulate data locally in order to increase performance or conserve network bandwidth.
Although models and views should respond to these hints in appropriate ways, custom components may ignore any or all of them if they are not relevant.
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QtGui.QAbstractItemDelegate.QAbstractItemDelegate | ( | QObject | parent = null | ) |
Creates a new abstract item delegate with the given parent.
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Returns the editor to be used for editing the data item with the given index. Note that the index contains information about the model being used. The editor's parent widget is specified by parent, and the item options by option.
The base implementation returns 0. If you want custom editing you will need to reimplement this function.
The returned editor widget should have Qt::StrongFocus; otherwise, QMouseEvents received by the widget will propagate to the view. The view's background will shine through unless the editor paints its own background (e.g., with setAutoFillBackground()).
See also setModelData() and setEditorData().
Reimplemented in QtGui.QStyledItemDelegate, QtGui.QItemDelegate, and QtSql.QSqlRelationalDelegate.
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virtual |
Reimplemented from QtCore.QObject.
Reimplemented in QtGui.QStyledItemDelegate, QtGui.QItemDelegate, and QtSql.QSqlRelationalDelegate.
new void QtGui.QAbstractItemDelegate.Dispose | ( | ) |
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Use QFontMetrics::elidedText() instead.
For example, if you have code like
QFontMetrics fm = ...
QString str = QAbstractItemDelegate::elidedText(fm, width, mode, text);
you can rewrite it as
QFontMetrics fm = ...
QString str = fm.elidedText(text, mode, width);
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This signal is emitted when the user has finished editing an item using the specified editor.
The hint provides a way for the delegate to influence how the model and view behave after editing is completed. It indicates to these components what action should be performed next to provide a comfortable editing experience for the user. For example, if EditNextItem is specified, the view should use a delegate to open an editor on the next item in the model.
See also EndEditHint.
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This signal must be emitted when the editor widget has completed editing the data, and wants to write it back into the model.
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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.
Mouse events are sent to editorEvent() even if they don't start editing of the item. This can, for instance, be useful if you wish to open a context menu when the right mouse button is pressed on an item.
The base implementation returns false (indicating that it has not handled the event).
Reimplemented in QtGui.QStyledItemDelegate, and QtGui.QItemDelegate.
new bool QtGui.QAbstractItemDelegate.OnHelpEvent | ( | QHelpEvent @ | event, |
QAbstractItemView | view, | ||
QStyleOptionViewItem | option, | ||
QModelIndex | index | ||
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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.
Returns true if the delegate can handle the event; otherwise returns false. A return value of true indicates that the data obtained using the index had the required role.
For QEvent::ToolTip and QEvent::WhatsThis events that were handled successfully, the relevant popup may be shown depending on the user's system configuration.
This function was introduced in Qt 4.3.
See also QHelpEvent.
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This signal must be emitted when the sizeHint() of index changed.
Views automatically connect to this signal and relayout items as necessary.
This function was introduced in Qt 4.4.
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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().
Implemented in QtGui.QStyledItemDelegate, and QtGui.QItemDelegate.
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Sets the contents of the given editor to the data for the item at the given index. Note that the index contains information about the model being used.
The base implementation does nothing. If you want custom editing you will need to reimplement this function.
See also setModelData().
Reimplemented in QtGui.QStyledItemDelegate, QtGui.QItemDelegate, and QtSql.QSqlRelationalDelegate.
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Sets the data for the item at the given index in the model to the contents of the given editor.
The base implementation does nothing. If you want custom editing you will need to reimplement this function.
See also setEditorData().
Reimplemented in QtGui.QStyledItemDelegate, QtGui.QItemDelegate, and QtSql.QSqlRelationalDelegate.
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pure virtual |
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().
Implemented in QtGui.QStyledItemDelegate, and QtGui.QItemDelegate.
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static |
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static |
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Updates the geometry of the editor for the item with the given index, according to the rectangle specified in the option. If the item has an internal layout, the editor will be laid out accordingly. Note that the index contains information about the model being used.
The base implementation does nothing. If you want custom editing you must reimplement this function.
Reimplemented in QtGui.QStyledItemDelegate, and QtGui.QItemDelegate.
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addremove |
This signal is emitted when the user has finished editing an item using the specified editor.
The hint provides a way for the delegate to influence how the model and view behave after editing is completed. It indicates to these components what action should be performed next to provide a comfortable editing experience for the user. For example, if EditNextItem is specified, the view should use a delegate to open an editor on the next item in the model.
See also EndEditHint.
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addremove |
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addremove |
This signal must be emitted when the editor widget has completed editing the data, and wants to write it back into the model.
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getprotected |
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addremove |
This signal must be emitted when the sizeHint() of index changed.
Views automatically connect to this signal and relayout items as necessary.
This function was introduced in Qt 4.4.
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staticget |