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JKQTPlotter trunk/v5.0.0
an extensive Qt5+Qt6 Plotter framework (including a feature-richt plotter widget, a speed-optimized, but limited variant and a LaTeX equation renderer!), written fully in C/C++ and without external dependencies
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JKQTPlotter trunk/v5.0.0
an extensive Qt5+Qt6 Plotter framework (including a feature-richt plotter widget, a speed-optimized, but limited variant and a LaTeX equation renderer!), written fully in C/C++ and without external dependencies
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this is the virtual base class of all JKQTPPlotElement's in a JKQTPlotter plot that represent geometric forms. More...
#include <jkqtpgraphsbase.h>
Public Types | |
| enum | DrawMode { DrawAsGraphicElement , DrawAsMathematicalCurve } |
| indicates how to draw the geometric object More... | |
 Public Types inherited from JKQTPPlotElement | |
| enum | HitTestMode { HitTestXY , HitTestXOnly , HitTestYOnly } |
| modes of operation for the function hitTest() More... | |
Public Slots | |
| void | setDrawMode (DrawMode mode) |
| indicated whether to draw lines as graphic elements (even on non-linear coordinate systems), or as mathematically correct curves | |
| Public Slots inherited from JKQTPPlotElement | |
| void | setHighlighted (bool __value) |
| sets whether the graph is drawn in a highlighted style in the plot | |
| virtual void | setTitle (const QString &__value) |
| sets the title of the plot (for display in key!). | |
| void | setVisible (bool __value) |
| sets whether the graph is visible in the plot | |
Public Member Functions | |
| JKQTPGeometricPlotElement (DrawMode drawMode=DrawAsGraphicElement, JKQTBasePlotter *parent=nullptr) | |
| class constructor | |
| virtual | ~JKQTPGeometricPlotElement () |
| default wirtual destructor | |
| DrawMode | getDrawMode () const |
| indicated whether to draw lines as graphic elements (even on non-linear coordinate systems), or as mathematically correct curves | |
| Public Member Functions inherited from JKQTPPlotElement | |
| JKQTPPlotElement (JKQTBasePlotter *parent=nullptr) | |
| class constructor | |
| virtual | ~JKQTPPlotElement ()=default |
| default wirtual destructor | |
| QPointF | backTransform (const QPointF &x) const |
| tool routine that back-transforms a QPointF according to the parent's transformation rules (pixels --> plot coordinate) | |
| QPointF | backTransform (double x, double y) const |
| tool routine that back-transforms a QPointF according to the parent's transformation rules (pixels --> plot coordinate) | |
| double | backtransformX (double x) const |
| tool routine that backtransforms an x-coordinate (pixels --> plot coordinate) for this plot element, uses the axis referenced in xAxisRef | |
| double | backtransformY (double y) const |
| tool routine that backtransforms a y-coordinate (pixels --> plot coordinate) for this plot element, uses the axis referenced in yAxisRef | |
| virtual void | draw (JKQTPEnhancedPainter &painter)=0 |
| plots the graph to the plotter object specified as parent | |
| virtual void | drawKeyMarker (JKQTPEnhancedPainter &painter, const QRectF &rect)=0 |
| plots a key marker inside the specified rectangle rect | |
| virtual void | drawOutside (JKQTPEnhancedPainter &painter, QRect leftSpace, QRect rightSpace, QRect topSpace, QRect bottomSpace) |
| plots outside the actual plot field of view (e.g. color bars, scale bars, ...) | |
| QImage | generateKeyMarker (QSize size=QSize(16, 16)) |
| returns an image with a key marker inside | |
| virtual QColor | getKeyLabelColor () const =0 |
| returns the color to be used for the key label | |
| virtual void | getOutsideSize (JKQTPEnhancedPainter &painter, int &leftSpace, int &rightSpace, int &topSpace, int &bottomSpace) |
| if the graph plots outside the actual plot field of view (e.g. color bars, scale bars, ...) | |
| JKQTBasePlotter * | getParent () |
| returns the parent painter class | |
| const JKQTBasePlotter * | getParent () const |
| returns the parent painter class | |
| QString | getTitle () const |
| returns the the title of the plot | |
| const JKQTPCoordinateAxis * | getXAxis () const |
| returns the actual x-Axis-object from the parent plotter, referenced in xAxisRef | |
| JKQTPCoordinateAxisRef | getXAxisRef () const |
| indicates which coordinate axis to use for coordinate transforms in x-direction | |
| virtual bool | getXMinMax (double &minx, double &maxx, double &smallestGreaterZero)=0 |
| get the maximum and minimum x-value of the graph | |
| const JKQTPCoordinateAxis * | getYAxis () const |
| returns the actual y-Axis-object from the parent plotter, referenced in yAxisRef | |
| JKQTPCoordinateAxisRef | getYAxisRef () const |
| indicates which coordinate axis to use for coordinate transforms in y-direction | |
| virtual bool | getYMinMax (double &miny, double &maxy, double &smallestGreaterZero)=0 |
| get the maximum and minimum y-value of the graph | |
| virtual double | hitTest (const QPointF &posSystem, QPointF *closestSpotSystem=nullptr, QString *label=nullptr, HitTestMode mode=HitTestXY) const |
returns the closest distance of the plot element to the (screen pixel) position pos, or NAN | |
| bool | isHighlighted () const |
| returns whether the graph is shown in a highlighted style in the plot | |
| bool | isVisible () const |
| returns whether the graph is visible in the plot | |
| void | setAxes (JKQTPCoordinateAxisRef ref) |
| set the coordinate axes to use for this plot element | |
| virtual void | setParent (JKQTBasePlotter *parent) |
| sets the parent painter class | |
| virtual void | setParent (JKQTPlotter *parent) |
| sets the parent painter class | |
| void | setXAxis (JKQTPCoordinateAxisRef ref) |
| indicates which coordinate axis to use for coordinate transforms in x-direction | |
| void | setYAxis (JKQTPCoordinateAxisRef ref) |
| indicates which coordinate axis to use for coordinate transforms in y-direction | |
| QPointF | transform (const QPointF &x) const |
| tool routine that transforms a QPointF according to the parent's transformation rules (plot coordinate --> pixels) | |
| QPolygonF | transform (const QPolygonF &x) const |
| tool routine that transforms a QPolygonF according to the parent's transformation rules (plot coordinate --> pixels) | |
| QPointF | transform (double x, double y) const |
| tool routine that transforms a QPointF according to the parent's transformation rules (plot coordinate --> pixels) | |
| QPainterPath | transformToLinePath (const QPolygonF &x) const |
| tool routine that transforms a QPolygonF according to the parent's transformation rules and returns a (non-closed) path consisting of lines (plot coordinate --> pixels) | |
| QVector< double > | transformX (const QVector< double > &x) const |
| transform all x-coordinates in a vector x | |
| double | transformX (double x) const |
| tool routine that transforms an x-coordinate (plot coordinate --> pixels) for this plot element, uses the axis referenced in xAxisRef | |
| QVector< double > | transformY (const QVector< double > &x) const |
| transform all y-coordinates in a vector x | |
| double | transformY (double y) const |
| tool routine that transforms a y-coordinate (plot coordinate --> pixels) for this plot element, uses the axis referenced in yAxisRef | |
Protected Attributes | |
| DrawMode | m_drawMode |
| indicated whether to draw lines as graphic elements (even on non-linear coordinate systems), or as mathematically correct curves | |
| Protected Attributes inherited from JKQTPPlotElement | |
| QVector< HitTestLocation > | m_hitTestData |
| dataset with graph-points and associated data from the function hitTest() | |
| JKQTBasePlotter * | parent |
| the plotter object this object belongs to | |
| int | parentPlotStyle |
| internal storage for the used parent plot style | |
Properties | |
| DrawMode | drawMode |
| Properties inherited from JKQTPPlotElement | |
| bool | highlighted |
| indicates whether the graph is shown in a "highlghted" in the plot | |
| QString | title |
| title of the plot (for display in key!). If no title is supplied, no key entry is drawn. | |
| bool | visible |
| indicates whether the graph is visible in the plot | |
| JKQTPCoordinateAxisRef | xAxisRef |
| indicates which coordinate axis to use for coordinate transforms in x-direction | |
| JKQTPCoordinateAxisRef | yAxisRef |
| indicates which coordinate axis to use for coordinate transforms in y-direction | |
Additional Inherited Members | |
| Protected Member Functions inherited from JKQTPPlotElement | |
| void | addHitTestData (const HitTestLocation &loc) |
| clear the internal datastore for hitTest() | |
| void | addHitTestData (const QPointF &pos_, const QString &label_) |
| clear the internal datastore for hitTest() | |
| void | addHitTestData (const QPointF &pos_, int index_, const QString &label_) |
| clear the internal datastore for hitTest() | |
| void | addHitTestData (const QPointF &pos_, int index_=-1, const JKQTPDatastore *datastore=nullptr) |
| clear the internal datastore for hitTest(), this variant uses formatHitTestDefaultLabel() to auto-generate the label | |
| void | addHitTestData (double x_, double y_, const QString &label_) |
| add a new point on the graph to the internal datastore for hitTest() | |
| void | addHitTestData (double x_, double y_, int index_, const QString &label_) |
| clear the internal datastore for hitTest() | |
| void | addHitTestData (double x_, double y_, int index_=-1, const JKQTPDatastore *datastore=nullptr) |
| add a new point on the graph to the internal datastore for hitTest(), this variant uses formatHitTestDefaultLabel() to auto-generate the label | |
| void | clearHitTestData () |
| clear the internal datastore for hitTest() | |
| virtual QString | formatHitTestDefaultLabel (double x, double y, int index=-1, const JKQTPDatastore *datastore=nullptr) const |
| tool-function for hitTest(), which formats a default label, taking into account the x- and y-position (both provided) and optionally the errors of these positions. | |
| void | reserveHitTestData (int points) |
| reserve list entries for up to points graph points in the internal datastore for hitTest() | |
| QString | xFloatToString (double v, int past_comma=-1) const |
| converts a x-value v into a string, taking into account the type of x-axis | |
| QString | yFloatToString (double v, int past_comma=-1) const |
| converts a x-value v into a string, taking into account the type of x-axis | |
this is the virtual base class of all JKQTPPlotElement's in a JKQTPlotter plot that represent geometric forms.
JKQTPGeometricPlotElement's have extended coordinate transform capabilities, because in addition to using the plot coordinates, you can also choose to use different other coordinate systems.
It is possible to define in which ways the forms shall be treated/drawn into non-linear coordinate systems (e.g. semi-log or log-log plots). Imagine drawing a line from (x1,y1) to (x2,y2) In a linear coordinate system, this is always a line, but in a non-linear system, the line might have to be represented by a curve instead. Depending on how you want to use the JKQTPGeometricPlotElement you can choose to still draw it as a line connecting the points (x1,y1) and (x2,y2), or as the - mathematically correct - curve connecting these two points:
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explicit |
class constructor
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virtual |
default wirtual destructor
| DrawMode JKQTPGeometricPlotElement::getDrawMode | ( | ) | const |
indicated whether to draw lines as graphic elements (even on non-linear coordinate systems), or as mathematically correct curves
\return the currently set DrawMode \see m_drawMode, DrawMode
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slot |
indicated whether to draw lines as graphic elements (even on non-linear coordinate systems), or as mathematically correct curves
\param mode the DrawMode to use from now on \see m_drawMode, DrawMode
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protected |
indicated whether to draw lines as graphic elements (even on non-linear coordinate systems), or as mathematically correct curves
It is possible to define in which ways the forms shall be treated/drawn into non-linear coordinate systems (e.g. semi-log or log-log plots). Imagine drawing a line from (x1,y1) to (x2,y2) In a linear coordinate system, this is always a line, but in a non-linear system, the line might have to be represented by a curve instead. Depending on how you want to use the JKQTPGeometricPlotElement you can choose to still draw it as a line connecting the points (x1,y1) and (x2,y2), or as the - mathematically correct - curve connecting these two points:
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