QCPItemLine
Public Member Functions | |
QCPItemLine (QCustomPlot *parentPlot) | |
QCPLineEnding | head () const |
QPen | pen () const |
QPen | selectedPen () const |
virtual double | selectTest (const QPointF &pos, bool onlySelectable, QVariant *details=nullptr) const override |
void | setHead (const QCPLineEnding &head) |
void | setPen (const QPen &pen) |
void | setSelectedPen (const QPen &pen) |
void | setTail (const QCPLineEnding &tail) |
QCPLineEnding | tail () const |
Public Member Functions inherited from QCPAbstractItem | |
QCPAbstractItem (QCustomPlot *parentPlot) | |
QCPItemAnchor * | anchor (const QString &name) const |
QList< QCPItemAnchor * > | anchors () const |
QCPAxisRect * | clipAxisRect () const |
bool | clipToAxisRect () const |
bool | hasAnchor (const QString &name) const |
QCPItemPosition * | position (const QString &name) const |
QList< QCPItemPosition * > | positions () const |
bool | selectable () const |
bool | selected () const |
void | setClipAxisRect (QCPAxisRect *rect) |
void | setClipToAxisRect (bool clip) |
Q_SLOT void | setSelectable (bool selectable) |
Q_SLOT void | setSelected (bool selected) |
Public Member Functions inherited from QCPLayerable | |
QCPLayerable (QCustomPlot *plot, QString targetLayer=QString(), QCPLayerable *parentLayerable=nullptr) | |
bool | antialiased () const |
QCPLayer * | layer () const |
QCPLayerable * | parentLayerable () const |
QCustomPlot * | parentPlot () const |
bool | realVisibility () const |
void | setAntialiased (bool enabled) |
bool | setLayer (const QString &layerName) |
Q_SLOT bool | setLayer (QCPLayer *layer) |
void | setVisible (bool on) |
bool | visible () const |
Public Member Functions inherited from QObject | |
QObject (QObject *parent) | |
QBindable< QString > | bindableObjectName () |
bool | blockSignals (bool block) |
const QObjectList & | children () const const |
QMetaObject::Connection | connect (const QObject *sender, const char *signal, const char *method, Qt::ConnectionType type) const const |
void | deleteLater () |
void | destroyed (QObject *obj) |
bool | disconnect (const char *signal, const QObject *receiver, const char *method) const const |
bool | disconnect (const QObject *receiver, const char *method) const const |
void | dumpObjectInfo () const const |
void | dumpObjectTree () const const |
QList< QByteArray > | dynamicPropertyNames () const const |
virtual bool | event (QEvent *e) |
virtual bool | eventFilter (QObject *watched, QEvent *event) |
T | findChild (const QString &name, Qt::FindChildOptions options) const const |
QList< T > | findChildren (const QRegularExpression &re, Qt::FindChildOptions options) const const |
QList< T > | findChildren (const QString &name, Qt::FindChildOptions options) const const |
QList< T > | findChildren (Qt::FindChildOptions options) const const |
bool | inherits (const char *className) const const |
void | installEventFilter (QObject *filterObj) |
bool | isQuickItemType () const const |
bool | isWidgetType () const const |
bool | isWindowType () const const |
void | killTimer (int id) |
virtual const QMetaObject * | metaObject () const const |
void | moveToThread (QThread *targetThread) |
QString | objectName () const const |
void | objectNameChanged (const QString &objectName) |
QObject * | parent () const const |
QVariant | property (const char *name) const const |
Q_CLASSINFO (Name, Value) | |
Q_EMIT Q_EMIT | |
Q_ENUM (...) | |
Q_ENUM_NS (...) | |
Q_ENUMS (...) | |
Q_FLAG (...) | |
Q_FLAG_NS (...) | |
Q_FLAGS (...) | |
Q_GADGET Q_GADGET | |
Q_GADGET_EXPORT (EXPORT_MACRO) | |
Q_INTERFACES (...) | |
Q_INVOKABLE Q_INVOKABLE | |
Q_MOC_INCLUDE Q_MOC_INCLUDE | |
Q_NAMESPACE Q_NAMESPACE | |
Q_NAMESPACE_EXPORT (EXPORT_MACRO) | |
Q_OBJECT Q_OBJECT | |
Q_PROPERTY (...) | |
Q_REVISION Q_REVISION | |
Q_SET_OBJECT_NAME (Object) | |
Q_SIGNAL Q_SIGNAL | |
Q_SIGNALS Q_SIGNALS | |
Q_SLOT Q_SLOT | |
Q_SLOTS Q_SLOTS | |
T | qobject_cast (const QObject *object) |
T | qobject_cast (QObject *object) |
QT_NO_NARROWING_CONVERSIONS_IN_CONNECT QT_NO_NARROWING_CONVERSIONS_IN_CONNECT | |
void | removeEventFilter (QObject *obj) |
void | setObjectName (const QString &name) |
void | setObjectName (QAnyStringView name) |
void | setParent (QObject *parent) |
bool | setProperty (const char *name, const QVariant &value) |
bool | setProperty (const char *name, QVariant &&value) |
bool | signalsBlocked () const const |
int | startTimer (int interval, Qt::TimerType timerType) |
int | startTimer (std::chrono::milliseconds interval, Qt::TimerType timerType) |
QThread * | thread () const const |
Public Attributes | |
QCPItemPosition *const | end |
QCPItemPosition *const | start |
Protected Member Functions | |
virtual void | draw (QCPPainter *painter) override |
QLineF | getRectClippedLine (const QCPVector2D &start, const QCPVector2D &end, const QRect &rect) const |
QPen | mainPen () const |
Protected Member Functions inherited from QCPAbstractItem | |
virtual QPointF | anchorPixelPosition (int anchorId) const |
virtual void | applyDefaultAntialiasingHint (QCPPainter *painter) const override |
virtual QRect | clipRect () const override |
QCPItemAnchor * | createAnchor (const QString &name, int anchorId) |
QCPItemPosition * | createPosition (const QString &name) |
virtual void | deselectEvent (bool *selectionStateChanged) override |
double | rectDistance (const QRectF &rect, const QPointF &pos, bool filledRect) const |
virtual void | selectEvent (QMouseEvent *event, bool additive, const QVariant &details, bool *selectionStateChanged) override |
virtual QCP::Interaction | selectionCategory () const override |
Protected Member Functions inherited from QCPLayerable | |
void | applyAntialiasingHint (QCPPainter *painter, bool localAntialiased, QCP::AntialiasedElement overrideElement) const |
void | initializeParentPlot (QCustomPlot *parentPlot) |
virtual void | mouseDoubleClickEvent (QMouseEvent *event, const QVariant &details) |
virtual void | mouseMoveEvent (QMouseEvent *event, const QPointF &startPos) |
virtual void | mousePressEvent (QMouseEvent *event, const QVariant &details) |
virtual void | mouseReleaseEvent (QMouseEvent *event, const QPointF &startPos) |
bool | moveToLayer (QCPLayer *layer, bool prepend) |
virtual void | parentPlotInitialized (QCustomPlot *parentPlot) |
void | setParentLayerable (QCPLayerable *parentLayerable) |
virtual void | wheelEvent (QWheelEvent *event) |
Protected Member Functions inherited from QObject | |
virtual void | childEvent (QChildEvent *event) |
virtual void | connectNotify (const QMetaMethod &signal) |
virtual void | customEvent (QEvent *event) |
virtual void | disconnectNotify (const QMetaMethod &signal) |
bool | isSignalConnected (const QMetaMethod &signal) const const |
int | receivers (const char *signal) const const |
QObject * | sender () const const |
int | senderSignalIndex () const const |
virtual void | timerEvent (QTimerEvent *event) |
Protected Attributes | |
QCPLineEnding | mHead |
QPen | mPen |
QPen | mSelectedPen |
QCPLineEnding | mTail |
Protected Attributes inherited from QCPAbstractItem | |
QList< QCPItemAnchor * > | mAnchors |
QPointer< QCPAxisRect > | mClipAxisRect |
bool | mClipToAxisRect |
QList< QCPItemPosition * > | mPositions |
bool | mSelectable |
bool | mSelected |
Protected Attributes inherited from QCPLayerable | |
bool | mAntialiased |
QCPLayer * | mLayer |
QPointer< QCPLayerable > | mParentLayerable |
QCustomPlot * | mParentPlot |
bool | mVisible |
Additional Inherited Members | |
Public Types inherited from QObject | |
typedef | QObjectList |
Properties inherited from QObject | |
objectName | |
Signals inherited from QCPAbstractItem | |
void | selectableChanged (bool selectable) |
void | selectionChanged (bool selected) |
Signals inherited from QCPLayerable | |
void | layerChanged (QCPLayer *newLayer) |
Static Public Member Functions inherited from QObject | |
QMetaObject::Connection | connect (const QObject *sender, const char *signal, const QObject *receiver, const char *method, Qt::ConnectionType type) |
QMetaObject::Connection | connect (const QObject *sender, const QMetaMethod &signal, const QObject *receiver, const QMetaMethod &method, Qt::ConnectionType type) |
QMetaObject::Connection | connect (const QObject *sender, PointerToMemberFunction signal, const QObject *context, Functor functor, Qt::ConnectionType type) |
QMetaObject::Connection | connect (const QObject *sender, PointerToMemberFunction signal, const QObject *receiver, PointerToMemberFunction method, Qt::ConnectionType type) |
QMetaObject::Connection | connect (const QObject *sender, PointerToMemberFunction signal, Functor functor) |
bool | disconnect (const QMetaObject::Connection &connection) |
bool | disconnect (const QObject *sender, const char *signal, const QObject *receiver, const char *method) |
bool | disconnect (const QObject *sender, const QMetaMethod &signal, const QObject *receiver, const QMetaMethod &method) |
bool | disconnect (const QObject *sender, PointerToMemberFunction signal, const QObject *receiver, PointerToMemberFunction method) |
QString | tr (const char *sourceText, const char *disambiguation, int n) |
Detailed Description
A line from one point to another.
It has two positions, start and end, which define the end points of the line.
With setHead and setTail you may set different line ending styles, e.g. to create an arrow.
Definition at line 6465 of file qcustomplot.h.
Constructor & Destructor Documentation
◆ QCPItemLine()
|
explicit |
Creates a line item and sets default values.
The created item is automatically registered with parentPlot. This QCustomPlot instance takes ownership of the item, so do not delete it manually but use QCustomPlot::removeItem() instead.
Definition at line 29058 of file qcustomplot.cpp.
◆ ~QCPItemLine()
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overridevirtual |
Definition at line 29070 of file qcustomplot.cpp.
Member Function Documentation
◆ draw()
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overrideprotectedvirtual |
Draws this item with the provided painter.
The cliprect of the provided painter is set to the rect returned by clipRect before this function is called. The clipRect depends on the clipping settings defined by setClipToAxisRect and setClipAxisRect.
Implements QCPAbstractItem.
Definition at line 29131 of file qcustomplot.cpp.
◆ getRectClippedLine()
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protected |
Returns the section of the line defined by start and end, that is visible in the specified rect.
This is a helper function for draw.
Definition at line 29161 of file qcustomplot.cpp.
◆ head()
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inline |
Definition at line 6481 of file qcustomplot.h.
◆ mainPen()
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protected |
Returns the pen that should be used for drawing lines. Returns mPen when the item is not selected and mSelectedPen when it is.
Definition at line 29259 of file qcustomplot.cpp.
◆ pen()
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inline |
Definition at line 6479 of file qcustomplot.h.
◆ selectedPen()
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inline |
Definition at line 6480 of file qcustomplot.h.
◆ selectTest()
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overridevirtual |
This function is used to decide whether a click hits a layerable object or not.
pos is a point in pixel coordinates on the QCustomPlot surface. This function returns the shortest pixel distance of this point to the object. If the object is either invisible or the distance couldn't be determined, -1.0 is returned. Further, if onlySelectable is true and the object is not selectable, -1.0 is returned, too.
If the object is represented not by single lines but by an area like a QCPItemText or the bars of a QCPBars plottable, a click inside the area should also be considered a hit. In these cases this function thus returns a constant value greater zero but still below the parent plot's selection tolerance. (typically the selectionTolerance multiplied by 0.99).
Providing a constant value for area objects allows selecting line objects even when they are obscured by such area objects, by clicking close to the lines (i.e. closer than 0.99*selectionTolerance).
The actual setting of the selection state is not done by this function. This is handled by the parent QCustomPlot when the mouseReleaseEvent occurs, and the finally selected object is notified via the selectEvent/ deselectEvent methods.
details is an optional output parameter. Every layerable subclass may place any information in details. This information will be passed to selectEvent when the parent QCustomPlot decides on the basis of this selectTest call, that the object was successfully selected. The subsequent call to selectEvent will carry the details. This is useful for multi-part objects (like QCPAxis). This way, a possibly complex calculation to decide which part was clicked is only done once in selectTest. The result (i.e. the actually clicked part) can then be placed in details. So in the subsequent selectEvent, the decision which part was selected doesn't have to be done a second time for a single selection operation.
In the case of 1D Plottables (QCPAbstractPlottable1D, like QCPGraph or QCPBars) details will be set to a QCPDataSelection, describing the closest data point to pos.
You may pass nullptr
as details to indicate that you are not interested in those selection details.
- See also
- selectEvent, deselectEvent, mousePressEvent, wheelEvent, QCustomPlot::setInteractions, QCPAbstractPlottable1D::selectTestRect
Implements QCPAbstractItem.
Definition at line 29121 of file qcustomplot.cpp.
◆ setHead()
void QCPItemLine::setHead | ( | const QCPLineEnding & | head | ) |
Sets the line ending style of the head. The head corresponds to the end position.
Note that due to the overloaded QCPLineEnding constructor, you may directly specify a QCPLineEnding::EndingStyle here, e.g.
- See also
- setTail
Definition at line 29102 of file qcustomplot.cpp.
◆ setPen()
void QCPItemLine::setPen | ( | const QPen & | pen | ) |
Sets the pen that will be used to draw the line
- See also
- setSelectedPen
Definition at line 29079 of file qcustomplot.cpp.
◆ setSelectedPen()
void QCPItemLine::setSelectedPen | ( | const QPen & | pen | ) |
Sets the pen that will be used to draw the line when selected
- See also
- setPen, setSelected
Definition at line 29089 of file qcustomplot.cpp.
◆ setTail()
void QCPItemLine::setTail | ( | const QCPLineEnding & | tail | ) |
Sets the line ending style of the tail. The tail corresponds to the start position.
Note that due to the overloaded QCPLineEnding constructor, you may directly specify a QCPLineEnding::EndingStyle here, e.g.
- See also
- setHead
Definition at line 29115 of file qcustomplot.cpp.
◆ tail()
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inline |
Definition at line 6482 of file qcustomplot.h.
Member Data Documentation
◆ end
QCPItemPosition* const QCPItemLine::end |
Definition at line 6494 of file qcustomplot.h.
◆ mHead
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protected |
Definition at line 6499 of file qcustomplot.h.
◆ mPen
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protected |
Definition at line 6498 of file qcustomplot.h.
◆ mSelectedPen
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protected |
Definition at line 6498 of file qcustomplot.h.
◆ mTail
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protected |
Definition at line 6499 of file qcustomplot.h.
◆ start
QCPItemPosition* const QCPItemLine::start |
Definition at line 6493 of file qcustomplot.h.
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