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.Simulation
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.Simulation
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Item that sticks to QCPGraph data points. More...
Public Types | |
| enum | TracerStyle { tsNone, tsPlus, tsCrosshair, tsCircle, tsSquare } |
| The different visual appearances a tracer item can have. More... | |
Public Member Functions | |
| QCPItemTracer (QCustomPlot *parentPlot) | |
| Creates a tracer item and sets default values. More... | |
| QPen | pen () const |
| QPen | selectedPen () const |
| QBrush | brush () const |
| QBrush | selectedBrush () const |
| double | size () const |
| TracerStyle | style () const |
| QCPGraph * | graph () const |
| double | graphKey () const |
| bool | interpolating () const |
| void | setPen (const QPen &pen) |
| Sets the pen that will be used to draw the line of the tracer. More... | |
| void | setSelectedPen (const QPen &pen) |
| Sets the pen that will be used to draw the line of the tracer when selected. More... | |
| void | setBrush (const QBrush &brush) |
| Sets the brush that will be used to draw any fills of the tracer. More... | |
| void | setSelectedBrush (const QBrush &brush) |
| Sets the brush that will be used to draw any fills of the tracer, when selected. More... | |
| void | setSize (double size) |
| Sets the size of the tracer in pixels, if the style supports setting a size (e.g. More... | |
| void | setStyle (TracerStyle style) |
| Sets the style/visual appearance of the tracer. More... | |
| void | setGraph (QCPGraph *graph) |
| Sets the QCPGraph this tracer sticks to. More... | |
| void | setGraphKey (double key) |
| Sets the key of the graph's data point the tracer will be positioned at. More... | |
| void | setInterpolating (bool enabled) |
| Sets whether the value of the graph's data points shall be interpolated, when positioning the tracer. More... | |
| virtual double | selectTest (const QPointF &pos) const |
| This function is used to decide whether a click hits an item or not. More... | |
| void | updatePosition () |
| If the tracer is connected with a graph (setGraph), this function updates the tracer's position to reside on the graph data, depending on the configured key (setGraphKey). More... | |
 Public Member Functions inherited from QCPlot::QCPAbstractItem | |
| QCPAbstractItem (QCustomPlot *parentPlot) | |
| Base class constructor which initializes base class members. | |
| bool | clipToAxisRect () const |
| QCPAxis * | clipKeyAxis () const |
| QCPAxis * | clipValueAxis () const |
| bool | selectable () const |
| bool | selected () const |
| void | setClipToAxisRect (bool clip) |
| Sets whether the item shall be clipped to the axis rect or whether it shall be visible on the entire QCustomPlot. More... | |
| void | setClipAxes (QCPAxis *keyAxis, QCPAxis *valueAxis) |
| Sets both clip axes. More... | |
| void | setClipKeyAxis (QCPAxis *axis) |
| Sets the clip key axis. More... | |
| void | setClipValueAxis (QCPAxis *axis) |
| Sets the clip value axis. More... | |
| void | setSelectable (bool selectable) |
| Sets whether the user can (de-)select this item by clicking on the QCustomPlot surface. More... | |
| 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 QCPlot::QCPLayerable | |
| QCPLayerable (QCustomPlot *parentPlot) | |
| Creates a new QCPLayerable instance. More... | |
| bool | visible () const |
| QCustomPlot * | parentPlot () const |
| QCPLayer * | layer () const |
| bool | antialiased () const |
| void | setVisible (bool on) |
| Sets the visibility of this layerable object. More... | |
| 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... | |
Public Attributes | |
| QCPItemPosition *const | position |
Protected Member Functions | |
| virtual void | draw (QCPPainter *painter) |
| QPen | mainPen () const |
| QBrush | mainBrush () const |
| Protected Member Functions inherited from QCPlot::QCPAbstractItem | |
| virtual QRect | clipRect () const |
| virtual void | applyDefaultAntialiasingHint (QCPPainter *painter) const |
| double | distSqrToLine (const QPointF &start, const QPointF &end, const QPointF &point) const |
| double | rectSelectTest (const QRectF &rect, const QPointF &pos, bool filledRect) const |
| virtual QPointF | anchorPixelPoint (int anchorId) const |
| QCPItemPosition * | createPosition (const QString &name) |
| QCPItemAnchor * | createAnchor (const QString &name, int anchorId) |
| Protected Member Functions inherited from QCPlot::QCPLayerable | |
| bool | moveToLayer (QCPLayer *layer, bool prepend) |
| void | applyAntialiasingHint (QCPPainter *painter, bool localAntialiased, QCP::AntialiasedElement overrideElement) const |
Protected Attributes | |
| QPen | mPen |
| QPen | mSelectedPen |
| QBrush | mBrush |
| QBrush | mSelectedBrush |
| double | mSize |
| TracerStyle | mStyle |
| QCPGraph * | mGraph |
| double | mGraphKey |
| bool | mInterpolating |
| Protected Attributes inherited from QCPlot::QCPAbstractItem | |
| bool | mClipToAxisRect |
| QCPAxis * | mClipKeyAxis |
| QCPAxis * | mClipValueAxis |
| bool | mSelectable |
| bool | mSelected |
| QList< QCPItemPosition * > | mPositions |
| QList< QCPItemAnchor * > | mAnchors |
| Protected Attributes inherited from QCPlot::QCPLayerable | |
| bool | mVisible |
| QCustomPlot * | mParentPlot |
| QCPLayer * | mLayer |
| bool | mAntialiased |
Additional Inherited Members | |
| Signals inherited from QCPlot::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. | |
Item that sticks to QCPGraph data points.
The tracer can be connected with a QCPGraph via setGraph. Then it will automatically adopt the coordinate axes of the graph and update its position to be on the graph's data. This means the key stays controllable via setGraphKey, but the value will follow the graph data. If a QCPGraph is connected, note that setting the coordinates directly via position will have no effect, i.e. be overriden in the next redraw (this is when the coodinate update happens).
If the specified key in setGraphKey is outside the key bounds of the graph, the tracer will stay at the respective end of the graph.
With setInterpolating you may specify whether the tracer may only stay exactly on data points or whether it interpolates data points linearly, if given a key that lies between two data points of the graph.
The tracer has different visual styles, see setStyle. It is also possible to make the tracer have no own visual appearance (set the style to tsNone), and just connect other item positions to the tracer position (used as an anchor) via QCPItemPosition::setParentAnchor.
The different visual appearances a tracer item can have.
Some styles size may be controlled with setSize.
| QCPlot::QCPItemTracer::QCPItemTracer | ( | QCustomPlot * | parentPlot | ) |
Creates a tracer 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 an item 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 item. If the item is either invisible or the distance couldn't be determined, -1.0 is returned. setSelectable has no influence on the return value of this function.
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 99% of the selectionTolerance of the parent QCustomPlot). 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.
Implements QCPlot::QCPAbstractItem.
| void QCPlot::QCPItemTracer::setBrush | ( | const QBrush & | brush | ) |
Sets the brush that will be used to draw any fills of the tracer.
| void QCPlot::QCPItemTracer::setGraph | ( | QCPGraph * | graph | ) |
Sets the QCPGraph this tracer sticks to.
The tracer position will be set to type QCPItemPosition::ptPlotCoords and the axes will be set to the axes of graph.
To free the tracer from any graph, set graph to 0. The tracer position can then be placed freely like any other item position. This is the state the tracer will assume when its graph gets deleted while still attached to it.
| void QCPlot::QCPItemTracer::setGraphKey | ( | double | key | ) |
Sets the key of the graph's data point the tracer will be positioned at.
This is the only free cordinate of a tracer when attached to a graph.
Depending on setInterpolating, the tracer will be either positioned on the data point closest to key, or will stay exactly at key and interpolate the value linearly.
| void QCPlot::QCPItemTracer::setInterpolating | ( | bool | enabled | ) |
Sets whether the value of the graph's data points shall be interpolated, when positioning the tracer.
If enabled is set to false and a key is given with setGraphKey, the tracer is placed on the data point of the graph which is closest to the key, but which is not necessarily exactly there. If enabled is true, the tracer will be positioned exactly at the specified key, and the appropriate value will be interpolated from the graph's data points linearly.
| void QCPlot::QCPItemTracer::setPen | ( | const QPen & | pen | ) |
Sets the pen that will be used to draw the line of the tracer.
| void QCPlot::QCPItemTracer::setSelectedBrush | ( | const QBrush & | brush | ) |
Sets the brush that will be used to draw any fills of the tracer, when selected.
| void QCPlot::QCPItemTracer::setSelectedPen | ( | const QPen & | pen | ) |
Sets the pen that will be used to draw the line of the tracer when selected.
| void QCPlot::QCPItemTracer::setSize | ( | double | size | ) |
Sets the size of the tracer in pixels, if the style supports setting a size (e.g.
tsSquare does, tsCrosshair does not).
| void QCPlot::QCPItemTracer::setStyle | ( | QCPItemTracer::TracerStyle | style | ) |
Sets the style/visual appearance of the tracer.
If you only want to use the tracer position as an anchor for other items, set style to tsNone.
| void QCPlot::QCPItemTracer::updatePosition | ( | ) |
If the tracer is connected with a graph (setGraph), this function updates the tracer's position to reside on the graph data, depending on the configured key (setGraphKey).
It is called automatically on every redraw and normally doesn't need to be called manually. One exception is when you want to read the tracer coordinates via position and are not sure that the graph's data (or the tracer key with setGraphKey) hasn't changed since the last redraw. In that situation, call this function before accessing position, to make sure you don't get out-of-date coordinates.
If there is no graph set on this tracer, this function does nothing.
1.8.5
