The QGraphicsObject class provides a base class for all graphics items that require signals, slots and properties.
More...
|
| QGraphicsObject (QGraphicsItem *parent=nullptr) |
|
const QList< QObject * > & | children () const |
|
void | grabGesture (Qt::GestureType gesture, Qt::GestureFlags flags=Qt::GestureFlags ()) |
|
void | ungrabGesture (Qt::GestureType gesture) |
|
| QObject (QObject *parent=nullptr) |
|
| ~QObject () |
|
bool | blockSignals (bool block) |
|
const QList< QObject * > & | children () const |
|
bool | connect (const QObject *sender, const QString &signalMethod, const QString &location, const QString &slotMethod, Qt::ConnectionType type=Qt::AutoConnection) |
|
bool | connect (const QObject *sender, const QString &signalMethod, const QString &slotMethod, Qt::ConnectionType type=Qt::AutoConnection) |
|
bool | disconnect (const QObject *receiver, const QString &slotMethod=QString ()) const |
|
bool | disconnect (const QString &signalMethod, const QString &location, const QObject *receiver=nullptr, const QString &slotMethod=QString ()) const |
|
bool | disconnect (const QString &signalMethod=QString (), const QObject *receiver=nullptr, const QString &slotMethod=QString ()) const |
|
void | dumpObjectInfo () |
|
void | dumpObjectTree () |
|
QList< QString > | dynamicPropertyNames () const |
|
virtual bool | event (QEvent *event) |
|
virtual bool | eventFilter (QObject *watched, QEvent *event) |
|
template<typename T > |
T | findChild (const QString &childName=QString ()) const |
|
template<class T > |
QList< T > | findChildren (const QRegularExpression ®Exp, Qt::FindChildOptions options=Qt::FindChildrenRecursively) const |
|
template<class T > |
QList< T > | findChildren (const QString &childName=QString (), Qt::FindChildOptions options=Qt::FindChildrenRecursively) const |
|
bool | inherits (const QString &className) const |
|
void | installEventFilter (QObject *filterObj) |
|
bool | isWidgetType () const |
|
bool | isWindowType () const |
|
void | killTimer (int id) |
|
const QMetaObject * | metaObject () const |
|
void | moveToThread (QThread *targetThread) |
|
QString | objectName () const |
|
QObject * | parent () const |
|
template<class T = QVariant> |
T | property (const QString &name) const |
|
void | removeEventFilter (QObject *obj) |
|
void | setObjectName (const QString &name) |
|
void | setParent (QObject *parent) |
|
bool | setProperty (const QString &name, const QVariant &value) |
|
bool | signalsBlocked () const |
|
int | startTimer (int interval, Qt::TimerType timerType=Qt::CoarseTimer) |
|
QThread * | thread () const |
|
| QGraphicsItem (QGraphicsItem *parent=nullptr) |
|
virtual | ~QGraphicsItem () |
|
bool | acceptDrops () const |
|
Qt::MouseButtons | acceptedMouseButtons () const |
|
bool | acceptHoverEvents () const |
|
bool | acceptTouchEvents () const |
|
virtual void | advance (int phase) |
|
virtual QRectF | boundingRect () const = 0 |
|
QRegion | boundingRegion (const QTransform &itemToDeviceTransform) const |
|
qreal | boundingRegionGranularity () const |
|
CacheMode | cacheMode () const |
|
QList< QGraphicsItem * > | childItems () const |
|
QRectF | childrenBoundingRect () const |
|
void | clearFocus () |
|
QPainterPath | clipPath () const |
|
virtual bool | collidesWithItem (const QGraphicsItem *graphicsItem, Qt::ItemSelectionMode mode=Qt::IntersectsItemShape) const |
|
virtual bool | collidesWithPath (const QPainterPath &path, Qt::ItemSelectionMode mode=Qt::IntersectsItemShape) const |
|
QList< QGraphicsItem * > | collidingItems (Qt::ItemSelectionMode mode=Qt::IntersectsItemShape) const |
|
QGraphicsItem * | commonAncestorItem (const QGraphicsItem *graphicsItem) const |
|
virtual bool | contains (const QPointF &point) const |
|
QCursor | cursor () const |
|
QVariant | data (int key) const |
|
QTransform | deviceTransform (const QTransform &viewportTransform) const |
|
qreal | effectiveOpacity () const |
|
void | ensureVisible (const QRectF &rectF=QRectF (), int xmargin=50, int ymargin=50) |
|
void | ensureVisible (qreal x, qreal y, qreal width, qreal height, int xmargin=50, int ymargin=50) |
|
bool | filtersChildEvents () const |
|
GraphicsItemFlags | flags () const |
|
QGraphicsItem * | focusItem () const |
|
QGraphicsItem * | focusProxy () const |
|
void | grabKeyboard () |
|
void | grabMouse () |
|
QGraphicsEffect * | graphicsEffect () const |
|
QGraphicsItemGroup * | group () const |
|
bool | handlesChildEvents () const |
|
bool | hasCursor () const |
|
bool | hasFocus () const |
|
void | hide () |
|
Qt::InputMethodHints | inputMethodHints () const |
|
void | installSceneEventFilter (QGraphicsItem *filterItem) |
|
bool | isActive () const |
|
bool | isAncestorOf (const QGraphicsItem *graphicsItem) const |
|
bool | isBlockedByModalPanel (QGraphicsItem **blockingPanel=nullptr) const |
|
bool | isClipped () const |
|
bool | isEnabled () const |
|
bool | isObscured (const QRectF &rectF=QRectF ()) const |
|
bool | isObscured (qreal x, qreal y, qreal width, qreal height) const |
|
virtual bool | isObscuredBy (const QGraphicsItem *graphicsItem) const |
|
bool | isPanel () const |
|
bool | isSelected () const |
|
bool | isUnderMouse () const |
|
bool | isVisible () const |
|
bool | isVisibleTo (const QGraphicsItem *graphicsItem) const |
|
bool | isWidget () const |
|
bool | isWindow () const |
|
QTransform | itemTransform (const QGraphicsItem *graphicsItem, bool *ok=nullptr) const |
|
QPainterPath | mapFromItem (const QGraphicsItem *graphicsItem, const QPainterPath &path) const |
|
QPointF | mapFromItem (const QGraphicsItem *graphicsItem, const QPointF &point) const |
|
QPolygonF | mapFromItem (const QGraphicsItem *graphicsItem, const QPolygonF &polygon) const |
|
QPolygonF | mapFromItem (const QGraphicsItem *graphicsItem, const QRectF &rectF) const |
|
QPointF | mapFromItem (const QGraphicsItem *graphicsItem, qreal x, qreal y) const |
|
QPolygonF | mapFromItem (const QGraphicsItem *graphicsItem, qreal x, qreal y, qreal width, qreal height) const |
|
QPainterPath | mapFromParent (const QPainterPath &path) const |
|
QPointF | mapFromParent (const QPointF &point) const |
|
QPolygonF | mapFromParent (const QPolygonF &polygon) const |
|
QPolygonF | mapFromParent (const QRectF &rectF) const |
|
QPointF | mapFromParent (qreal x, qreal y) const |
|
QPolygonF | mapFromParent (qreal x, qreal y, qreal width, qreal height) const |
|
QPainterPath | mapFromScene (const QPainterPath &path) const |
|
QPointF | mapFromScene (const QPointF &point) const |
|
QPolygonF | mapFromScene (const QPolygonF &polygon) const |
|
QPolygonF | mapFromScene (const QRectF &rectF) const |
|
QPointF | mapFromScene (qreal x, qreal y) const |
|
QPolygonF | mapFromScene (qreal x, qreal y, qreal width, qreal height) const |
|
QRectF | mapRectFromItem (const QGraphicsItem *graphicsItem, const QRectF &rectF) const |
|
QRectF | mapRectFromItem (const QGraphicsItem *graphicsItem, qreal x, qreal y, qreal width, qreal height) const |
|
QRectF | mapRectFromParent (const QRectF &rectF) const |
|
QRectF | mapRectFromParent (qreal x, qreal y, qreal width, qreal height) const |
|
QRectF | mapRectFromScene (const QRectF &rectF) const |
|
QRectF | mapRectFromScene (qreal x, qreal y, qreal width, qreal height) const |
|
QRectF | mapRectToItem (const QGraphicsItem *graphicsItem, const QRectF &rectF) const |
|
QRectF | mapRectToItem (const QGraphicsItem *graphicsItem, qreal x, qreal y, qreal width, qreal height) const |
|
QRectF | mapRectToParent (const QRectF &rectF) const |
|
QRectF | mapRectToParent (qreal x, qreal y, qreal width, qreal height) const |
|
QRectF | mapRectToScene (const QRectF &rectF) const |
|
QRectF | mapRectToScene (qreal x, qreal y, qreal width, qreal height) const |
|
QPainterPath | mapToItem (const QGraphicsItem *graphicsItem, const QPainterPath &path) const |
|
QPointF | mapToItem (const QGraphicsItem *graphicsItem, const QPointF &point) const |
|
QPolygonF | mapToItem (const QGraphicsItem *graphicsItem, const QPolygonF &polygon) const |
|
QPolygonF | mapToItem (const QGraphicsItem *graphicsItem, const QRectF &rectF) const |
|
QPointF | mapToItem (const QGraphicsItem *graphicsItem, qreal x, qreal y) const |
|
QPolygonF | mapToItem (const QGraphicsItem *graphicsItem, qreal x, qreal y, qreal width, qreal height) const |
|
QPainterPath | mapToParent (const QPainterPath &path) const |
|
QPointF | mapToParent (const QPointF &point) const |
|
QPolygonF | mapToParent (const QPolygonF &polygon) const |
|
QPolygonF | mapToParent (const QRectF &rectF) const |
|
QPointF | mapToParent (qreal x, qreal y) const |
|
QPolygonF | mapToParent (qreal x, qreal y, qreal width, qreal height) const |
|
QPainterPath | mapToScene (const QPainterPath &path) const |
|
QPointF | mapToScene (const QPointF &point) const |
|
QPolygonF | mapToScene (const QPolygonF &polygon) const |
|
QPolygonF | mapToScene (const QRectF &rectF) const |
|
QPointF | mapToScene (qreal x, qreal y) const |
|
QPolygonF | mapToScene (qreal x, qreal y, qreal width, qreal height) const |
|
QMatrix | matrix () const |
|
void | moveBy (qreal dx, qreal dy) |
|
qreal | opacity () const |
|
virtual QPainterPath | opaqueArea () const |
|
virtual void | paint (QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget=nullptr) = 0 |
|
QGraphicsItem * | panel () const |
|
PanelModality | panelModality () const |
|
QGraphicsItem * | parentItem () const |
|
QGraphicsObject * | parentObject () const |
|
QGraphicsWidget * | parentWidget () const |
|
QPointF | pos () const |
|
void | removeSceneEventFilter (QGraphicsItem *filterItem) |
|
void | resetMatrix () |
|
void | resetTransform () |
|
qreal | rotation () const |
|
qreal | scale () const |
|
QGraphicsScene * | scene () const |
|
QRectF | sceneBoundingRect () const |
|
QMatrix | sceneMatrix () const |
|
QPointF | scenePos () const |
|
QTransform | sceneTransform () const |
|
void | scroll (qreal dx, qreal dy, const QRectF &rectF=QRectF ()) |
|
void | setAcceptDrops (bool on) |
|
void | setAcceptedMouseButtons (Qt::MouseButtons buttons) |
|
void | setAcceptHoverEvents (bool enabled) |
|
void | setAcceptTouchEvents (bool enabled) |
|
void | setActive (bool active) |
|
void | setBoundingRegionGranularity (qreal granularity) |
|
void | setCacheMode (CacheMode mode, const QSize &cacheSize=QSize ()) |
|
void | setCursor (const QCursor &cursor) |
|
void | setData (int key, const QVariant &value) |
|
void | setEnabled (bool enabled) |
|
void | setFiltersChildEvents (bool enabled) |
|
void | setFlag (GraphicsItemFlag flag, bool enabled=true) |
|
void | setFlags (GraphicsItemFlags flags) |
|
void | setFocus (Qt::FocusReason focusReason=Qt::OtherFocusReason) |
|
void | setFocusProxy (QGraphicsItem *graphicsItem) |
|
void | setGraphicsEffect (QGraphicsEffect *effect) |
|
void | setGroup (QGraphicsItemGroup *group) |
|
void | setHandlesChildEvents (bool enabled) |
|
void | setInputMethodHints (Qt::InputMethodHints hints) |
|
void | setMatrix (const QMatrix &matrix, bool combine=false) |
|
void | setOpacity (qreal opacity) |
|
void | setPanelModality (PanelModality panelModality) |
|
void | setParentItem (QGraphicsItem *parent) |
|
void | setPos (const QPointF &pos) |
|
void | setPos (qreal x, qreal y) |
|
void | setRotation (qreal angle) |
|
void | setScale (qreal factor) |
|
void | setSelected (bool selected) |
|
void | setToolTip (const QString &toolTip) |
|
void | setTransform (const QTransform &matrix, bool combine=false) |
|
void | setTransformations (const QList< QGraphicsTransform * > &transformations) |
|
void | setTransformOriginPoint (const QPointF &origin) |
|
void | setTransformOriginPoint (qreal x, qreal y) |
|
void | setVisible (bool visible) |
|
void | setX (qreal x) |
|
void | setY (qreal y) |
|
void | setZValue (qreal z) |
|
virtual QPainterPath | shape () const |
|
void | show () |
|
void | stackBefore (const QGraphicsItem *graphicsItem) |
|
QGraphicsObject * | toGraphicsObject () |
|
const QGraphicsObject * | toGraphicsObject () const |
|
QString | toolTip () const |
|
QGraphicsItem * | topLevelItem () const |
|
QGraphicsWidget * | topLevelWidget () const |
|
QTransform | transform () const |
|
QList< QGraphicsTransform * > | transformations () const |
|
QPointF | transformOriginPoint () const |
|
virtual int | type () const |
|
void | ungrabKeyboard () |
|
void | ungrabMouse () |
|
void | unsetCursor () |
|
void | update (const QRectF &rectF=QRectF ()) |
|
void | update (qreal x, qreal y, qreal width, qreal height) |
|
QGraphicsWidget * | window () const |
|
qreal | x () const |
|
qreal | y () const |
|
qreal | zValue () const |
|
|
using | GraphicsItemFlags = QFlags< GraphicsItemFlag > |
|
enum | CacheMode |
|
enum | GraphicsItemChange |
|
enum | GraphicsItemFlag |
|
enum | PanelModality |
|
void | deleteLater () |
|
static bool | connect (const QObject *sender, const QMetaMethod &signalMethod, const QObject *receiver, const QMetaMethod &slotMethod, Qt::ConnectionType type=Qt::AutoConnection) |
|
static bool | connect (const QObject *sender, const QString &signalMethod, const QObject *receiver, const QString &slotMethod, Qt::ConnectionType type=Qt::AutoConnection, const QString &location=QString ()) |
|
static bool | connect (const QObject *sender, const QString &signalMethod, const QString &location, const QObject *receiver, const QString &slotMethod, Qt::ConnectionType type=Qt::AutoConnection) |
|
template<class Sender , class SignalClass , class... SignalArgs, class Receiver , class SlotClass , class... SlotArgs, class SlotReturn > |
static bool | connect (const Sender *sender, void (SignalClass::*signalMethod)(SignalArgs...), const Receiver *receiver, SlotReturn (SlotClass::*slotMethod)(SlotArgs...), Qt::ConnectionType type=Qt::AutoConnection) |
|
template<class Sender , class SignalClass , class... SignalArgs, class Receiver , class T > |
static bool | connect (const Sender *sender, void (SignalClass::*signalMethod)(SignalArgs...), const Receiver *receiver, T slotLambda, Qt::ConnectionType type=Qt::AutoConnection) |
|
static bool | disconnect (const QObject *sender, const QMetaMethod &signalMethod, const QObject *receiver, const QMetaMethod &slotMethod) |
|
static bool | disconnect (const QObject *sender, const QString &signalMethod, const QObject *receiver, const QString &slotMethod) |
|
static bool | disconnect (const QObject *sender, const QString &signalMethod, const QString &location, const QObject *receiver, const QString &slotMethod) |
|
static bool | disconnect (const QObject *sender, std::nullptr_t, const QObject *receiver, std::nullptr_t) |
|
template<class Sender , class SignalClass , class... SignalArgs, class Receiver , class SlotClass , class... SlotArgs, class SlotReturn > |
static bool | disconnect (const Sender *sender, void (SignalClass::*signalMethod)(SignalArgs...), const Receiver *receiver, SlotReturn (SlotClass::*slotMethod)(SlotArgs...)) |
|
template<class Sender , class SignalClass , class... SignalArgs, class Receiver > |
static bool | disconnect (const Sender *sender, void (SignalClass::*signalMethod)(SignalArgs...), const Receiver *receiver, std::nullptr_t slotMethod=nullptr) |
|
template<class Sender , class SignalClass , class... SignalArgs, class Receiver , class T > |
static bool | disconnect (const Sender *sender, void (SignalClass::*signalMethod)(SignalArgs...), const Receiver *receiver, T slotMethod) |
|
static QMetaObject & | staticMetaObject () |
|
static QString | tr (const char *text, const char *comment=nullptr, std::optional< int > numArg=std::optional< int >()) |
|
static constexpr const int | UserType = 65536 |
|
T | qobject_cast (QObject *object) |
|
| QObjectList |
|
T | qgraphicsitem_cast (QGraphicsItem *item) |
|
The QGraphicsObject class provides a base class for all graphics items which use signals, slots and properties. This class extends a QGraphicsItem with the signal/slot and property mechanisms. It also maps many of the basic QGraphicsItem basic setters and getters to properties in this class and adds notification signals.
Parents and Children
Each graphics object can be constructed with a parent item. This ensures that the item will be destroyed when its parent item is destroyed. Although QGraphicsObject inherits from both QObject and QGraphicsItem, you should use the methods provided by QGraphicsItem and not QObject to manage the relationships between parent and child items.
The relationships between items can be explored using the parentItem() and childItems() functions. In the hierarchy of items in a scene, the parentObject() and parentWidget() methods are equivalent to the QWidget::parent() and QWidget::parentWidget() methods for QWidget subclasses.
- See also
- QGraphicsItem, QGraphicsWidget