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A line from one point to another. Más...
Métodos públicos | |
| QCPItemLine (QCustomPlot *parentPlot) | |
| QPen | pen () const |
| QPen | selectedPen () const |
| QCPLineEnding | head () const |
| QCPLineEnding | tail () const |
| void | setPen (const QPen &pen) |
| void | setSelectedPen (const QPen &pen) |
| void | setHead (const QCPLineEnding &head) |
| void | setTail (const QCPLineEnding &tail) |
| virtual double | selectTest (const QPointF &pos, bool onlySelectable, QVariant *details=0) const |
 Métodos públicos heredados desde QCPAbstractItem | |
| QCPAbstractItem (QCustomPlot *parentPlot) | |
| bool | clipToAxisRect () const |
| QCPAxisRect * | clipAxisRect () const |
| bool | selectable () const |
| bool | selected () const |
| void | setClipToAxisRect (bool clip) |
| void | setClipAxisRect (QCPAxisRect *rect) |
| void | setSelectable (bool selectable) |
| void | setSelected (bool selected) |
| QList< QCPItemPosition * > | positions () const |
| QList< QCPItemAnchor * > | anchors () const |
| QCPItemPosition * | position (const QString &name) const |
| QCPItemAnchor * | anchor (const QString &name) const |
| bool | hasAnchor (const QString &name) const |
| Métodos públicos heredados desde QCPLayerable | |
| QCPLayerable (QCustomPlot *plot, QString targetLayer="", QCPLayerable *parentLayerable=0) | |
| bool | visible () const |
| QCustomPlot * | parentPlot () const |
| QCPLayerable * | parentLayerable () const |
| QCPLayer * | layer () const |
| bool | antialiased () const |
| void | setVisible (bool on) |
| bool | setLayer (QCPLayer *layer) |
| bool | setLayer (const QString &layerName) |
| void | setAntialiased (bool enabled) |
| bool | realVisibility () const |
Atributos públicos | |
| QCPItemPosition *const | start |
| QCPItemPosition *const | end |
Métodos protegidos | |
| virtual void | draw (QCPPainter *painter) |
| QLineF | getRectClippedLine (const QVector2D &start, const QVector2D &end, const QRect &rect) const |
| QPen | mainPen () const |
| Métodos protegidos heredados desde 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) |
| Métodos protegidos heredados desde 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 |
Atributos protegidos | |
| QPen | mPen |
| QPen | mSelectedPen |
| QCPLineEnding | mHead |
| QCPLineEnding | mTail |
| Atributos protegidos heredados desde QCPAbstractItem | |
| bool | mClipToAxisRect |
| QPointer< QCPAxisRect > | mClipAxisRect |
| QList< QCPItemPosition * > | mPositions |
| QList< QCPItemAnchor * > | mAnchors |
| bool | mSelectable |
| bool | mSelected |
| Atributos protegidos heredados desde QCPLayerable | |
| bool | mVisible |
| QCustomPlot * | mParentPlot |
| QPointer< QCPLayerable > | mParentLayerable |
| QCPLayer * | mLayer |
| bool | mAntialiased |
Otros miembros heredados | |
| Señales heredados desde QCPAbstractItem | |
| void | selectionChanged (bool selected) |
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.
| QCPItemLine::QCPItemLine | ( | QCustomPlot * | parentPlot | ) |
Creates a line item and sets default values.
The constructed item can be added to the plot with QCustomPlot::addItem.
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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.
Implementa QCPAbstractItem.
| 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.
| void QCPItemLine::setPen | ( | const QPen & | pen | ) |
Sets the pen that will be used to draw the line
| void QCPItemLine::setSelectedPen | ( | const QPen & | pen | ) |
Sets the pen that will be used to draw the line when selected
| 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.
1.8.9.1
