An ellipse. More...
Public Functions | |
| QCPItemEllipse (QCustomPlot *parentPlot) | |
| QPen | pen () const |
| QPen | selectedPen () const |
| QBrush | brush () const |
| QBrush | selectedBrush () const |
| void | setPen (const QPen &pen) |
| void | setSelectedPen (const QPen &pen) |
| void | setBrush (const QBrush &brush) |
| void | setSelectedBrush (const QBrush &brush) |
| virtual double | selectTest (const QPointF &pos, bool onlySelectable, QVariant *details=0) const |
 Public Functions inherited from QCPAbstractItem | |
| QCPAbstractItem (QCustomPlot *parentPlot) | |
| bool | clipToAxisRect () const |
| QCPAxisRect * | clipAxisRect () const |
| bool | selectable () const |
| bool | selected () const |
| void | setClipToAxisRect (bool clip) |
| void | setClipAxisRect (QCPAxisRect *rect) |
| Q_SLOT void | setSelectable (bool selectable) |
| Q_SLOT 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 |
| Public Functions inherited from 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) |
| Q_SLOT bool | setLayer (QCPLayer *layer) |
| bool | setLayer (const QString &layerName) |
| void | setAntialiased (bool enabled) |
| bool | realVisibility () const |
Public Members | |
| QCPItemPosition *const | topLeft |
| QCPItemPosition *const | bottomRight |
| QCPItemAnchor *const | topLeftRim |
| QCPItemAnchor *const | top |
| QCPItemAnchor *const | topRightRim |
| QCPItemAnchor *const | right |
| QCPItemAnchor *const | bottomRightRim |
| QCPItemAnchor *const | bottom |
| QCPItemAnchor *const | bottomLeftRim |
| QCPItemAnchor *const | left |
| QCPItemAnchor *const | center |
Protected Types | |
| enum | AnchorIndex |
Protected Functions | |
| virtual void | draw (QCPPainter *painter) |
| virtual QPointF | anchorPixelPoint (int anchorId) const |
| QPen | mainPen () const |
| QBrush | mainBrush () const |
| Protected 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) |
| 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 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 |
Additional Inherited Members | |
| Signals inherited from QCPAbstractItem | |
| void | selectionChanged (bool selected) |
| void | selectableChanged (bool selectable) |
Detailed Description
An ellipse.
It has two positions, topLeft and bottomRight, which define the rect the ellipse will be drawn in.
Constructor & Destructor Documentation
| QCPItemEllipse::QCPItemEllipse | ( | QCustomPlot * | parentPlot | ) |
Creates an ellipse item and sets default values.
The constructed item can be added to the plot with QCustomPlot::addItem.
Member Function Documentation
| void QCPItemEllipse::setPen | ( | const QPen & | pen | ) |
Sets the pen that will be used to draw the line of the ellipse
- See Also
- setSelectedPen, setBrush
| void QCPItemEllipse::setSelectedPen | ( | const QPen & | pen | ) |
Sets the pen that will be used to draw the line of the ellipse when selected
- See Also
- setPen, setSelected
| void QCPItemEllipse::setBrush | ( | const QBrush & | brush | ) |
Sets the brush that will be used to fill the ellipse. To disable filling, set brush to Qt::NoBrush.
- See Also
- setSelectedBrush, setPen
| void QCPItemEllipse::setSelectedBrush | ( | const QBrush & | brush | ) |
Sets the brush that will be used to fill the ellipse when selected. To disable filling, set brush to Qt::NoBrush.
- See Also
- setBrush
|
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.
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protectedvirtual |
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.
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protectedvirtual |
Returns the pixel position of the anchor with Id anchorId. This function must be reimplemented in item subclasses if they want to provide anchors (QCPItemAnchor).
For example, if the item has two anchors with id 0 and 1, this function takes one of these anchor ids and returns the respective pixel points of the specified anchor.
- See Also
- createAnchor
Reimplemented from QCPAbstractItem.
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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.
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protected |
Returns the brush that should be used for drawing fills of the item. Returns mBrush when the item is not selected and mSelectedBrush when it is.
The documentation for this class was generated from the following files:
- src/items/item-ellipse.h
- src/items/item-ellipse.cpp