iCub-main
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A straight line that spans infinitely in both directions. More...
#include <qcustomplot.h>
Public Member Functions | |
QCPItemStraightLine (QCustomPlot *parentPlot) | |
Creates a straight line item and sets default values. More... | |
virtual | ~QCPItemStraightLine () |
QPen | pen () const |
QPen | selectedPen () const |
void | setPen (const QPen &pen) |
Sets the pen that will be used to draw the line. More... | |
void | setSelectedPen (const QPen &pen) |
Sets the pen that will be used to draw the line when selected. More... | |
virtual double | selectTest (const QPointF &pos, bool onlySelectable, QVariant *details=0) const |
This function is used to decide whether a click hits a layerable object or not. More... | |
Public Member Functions inherited from QCPAbstractItem | |
QCPAbstractItem (QCustomPlot *parentPlot) | |
Base class constructor which initializes base class members. More... | |
virtual | ~QCPAbstractItem () |
bool | clipToAxisRect () const |
QCPAxisRect * | clipAxisRect () const |
bool | selectable () const |
bool | selected () const |
void | setClipToAxisRect (bool clip) |
Sets whether the item shall be clipped to an axis rect or whether it shall be visible on the entire QCustomPlot. More... | |
void | setClipAxisRect (QCPAxisRect *rect) |
Sets the clip axis rect. More... | |
Q_SLOT void | setSelectable (bool selectable) |
Sets whether the user can (de-)select this item by clicking on the QCustomPlot surface. More... | |
Q_SLOT void | setSelected (bool selected) |
Sets whether this item is selected or not. More... | |
QList< QCPItemPosition * > | positions () const |
Returns all positions of the item in a list. More... | |
QList< QCPItemAnchor * > | anchors () const |
Returns all anchors of the item in a list. More... | |
QCPItemPosition * | position (const QString &name) const |
Returns the QCPItemPosition with the specified name. More... | |
QCPItemAnchor * | anchor (const QString &name) const |
Returns the QCPItemAnchor with the specified name. More... | |
bool | hasAnchor (const QString &name) const |
Returns whether this item has an anchor with the specified name. More... | |
Public Member Functions inherited from QCPLayerable | |
QCPLayerable (QCustomPlot *plot, QString targetLayer="", QCPLayerable *parentLayerable=0) | |
Creates a new QCPLayerable instance. More... | |
~QCPLayerable () | |
bool | visible () const |
QCustomPlot * | parentPlot () const |
QCPLayerable * | parentLayerable () const |
Returns the parent layerable of this layerable. More... | |
QCPLayer * | layer () const |
bool | antialiased () const |
void | setVisible (bool on) |
Sets the visibility of this layerable object. More... | |
Q_SLOT bool | setLayer (QCPLayer *layer) |
Sets the layer of this layerable object. More... | |
bool | setLayer (const QString &layerName) |
This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. Sets the layer of this layerable object by name. More... | |
void | setAntialiased (bool enabled) |
Sets whether this object will be drawn antialiased or not. More... | |
bool | realVisibility () const |
Returns whether this layerable is visible, taking the visibility of the layerable parent and the visibility of the layer this layerable is on into account. More... | |
Public Attributes | |
QCPItemPosition *const | point1 |
QCPItemPosition *const | point2 |
Protected Member Functions | |
virtual void | draw (QCPPainter *painter) |
double | distToStraightLine (const QVector2D &point1, const QVector2D &vec, const QVector2D &point) const |
QLineF | getRectClippedStraightLine (const QVector2D &point1, const QVector2D &vec, const QRect &rect) const |
QPen | mainPen () const |
Protected Member Functions inherited from QCPAbstractItem | |
virtual QCP::Interaction | selectionCategory () const |
virtual QRect | clipRect () const |
virtual void | applyDefaultAntialiasingHint (QCPPainter *painter) const |
virtual void | selectEvent (QMouseEvent *event, bool additive, const QVariant &details, bool *selectionStateChanged) |
virtual void | deselectEvent (bool *selectionStateChanged) |
virtual QPointF | anchorPixelPoint (int anchorId) const |
double | distSqrToLine (const QPointF &start, const QPointF &end, const QPointF &point) const |
double | rectSelectTest (const QRectF &rect, const QPointF &pos, bool filledRect) const |
QCPItemPosition * | createPosition (const QString &name) |
QCPItemAnchor * | createAnchor (const QString &name, int anchorId) |
Protected Member Functions inherited from QCPLayerable | |
virtual void | parentPlotInitialized (QCustomPlot *parentPlot) |
void | initializeParentPlot (QCustomPlot *parentPlot) |
void | setParentLayerable (QCPLayerable *parentLayerable) |
bool | moveToLayer (QCPLayer *layer, bool prepend) |
void | applyAntialiasingHint (QCPPainter *painter, bool localAntialiased, QCP::AntialiasedElement overrideElement) const |
Protected Attributes | |
QPen | mPen |
QPen | mSelectedPen |
Protected Attributes inherited from QCPAbstractItem | |
bool | mClipToAxisRect |
QPointer< QCPAxisRect > | mClipAxisRect |
QList< QCPItemPosition * > | mPositions |
QList< QCPItemAnchor * > | mAnchors |
bool | mSelectable |
bool | mSelected |
Protected Attributes inherited from QCPLayerable | |
bool | mVisible |
QCustomPlot * | mParentPlot |
QPointer< QCPLayerable > | mParentLayerable |
QCPLayer * | mLayer |
bool | mAntialiased |
Additional Inherited Members | |
Signals inherited from QCPAbstractItem | |
void | selectionChanged (bool selected) |
This signal is emitted when the selection state of this item has changed, either by user interaction or by a direct call to setSelected. More... | |
void | selectableChanged (bool selectable) |
Signals inherited from QCPLayerable | |
void | layerChanged (QCPLayer *newLayer) |
This signal is emitted when the layer of this layerable changes, i.e. More... | |
A straight line that spans infinitely in both directions.
It has two positions, point1 and point2, which define the straight line.
Definition at line 3002 of file qcustomplot.h.
QCPItemStraightLine::QCPItemStraightLine | ( | QCustomPlot * | parentPlot | ) |
Creates a straight line item and sets default values.
The constructed item can be added to the plot with QCustomPlot::addItem.
Definition at line 19314 of file qcustomplot.cpp.
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Definition at line 19326 of file qcustomplot.cpp.
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protected |
Definition at line 19383 of file qcustomplot.cpp.
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protectedvirtual |
Implements QCPAbstractItem.
Definition at line 19361 of file qcustomplot.cpp.
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Definition at line 19395 of file qcustomplot.cpp.
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Definition at line 19479 of file qcustomplot.cpp.
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Definition at line 3014 of file qcustomplot.h.
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Definition at line 3015 of file qcustomplot.h.
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virtual |
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 item is represented not by single lines but by an area like QCPItemRect or QCPItemText, a click inside the area returns a constant value greater zero (typically the selectionTolerance of the parent QCustomPlot multiplied by 0.99). If the click lies outside the area, this function returns -1.0.
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.
You may pass 0 as details to indicate that you are not interested in those selection details.
Implements QCPAbstractItem.
Definition at line 19351 of file qcustomplot.cpp.
void QCPItemStraightLine::setPen | ( | const QPen & | pen | ) |
Sets the pen that will be used to draw the line.
Definition at line 19335 of file qcustomplot.cpp.
void QCPItemStraightLine::setSelectedPen | ( | const QPen & | pen | ) |
Sets the pen that will be used to draw the line when selected.
Definition at line 19345 of file qcustomplot.cpp.
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Definition at line 3029 of file qcustomplot.h.
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Definition at line 3029 of file qcustomplot.h.
QCPItemPosition* const QCPItemStraightLine::point1 |
Definition at line 3024 of file qcustomplot.h.
QCPItemPosition* const QCPItemStraightLine::point2 |
Definition at line 3025 of file qcustomplot.h.