Section 3: library functions
QwtPlainTextEngine – A text engine for plain texts. Synopsis #include <qwt_text_engine.h> Inherits QwtTextEngine. Public Member Functions QwtPlainTextEngine () Constructor. virtual ~QwtPlainTextEngine () Destructor. virtual double heightForWidth (const QFont &font, int flags, const QString &text, double width) const virtual QSizeF textSize (const QFont &font, int flags, const QString &text) const virtual void draw (QPainter *painter, const…
QwtPixelMatrix – A bit field corresponding to the pixels of a rectangle. Synopsis #include <qwt_pixel_matrix.h> Inherits QBitArray. Public Member Functions QwtPixelMatrix (const QRect &rect) Constructor. ~QwtPixelMatrix () Destructor. void setRect (const QRect &rect) QRect rect () const bool testPixel (int x, int y) const Test if a pixel has been set. bool testAndSetPixel (int x,…
QwtPickerTrackerMachine – A state machine for indicating mouse movements. Synopsis #include <qwt_picker_machine.h> Inherits QwtPickerMachine. Public Member Functions QwtPickerTrackerMachine () Constructor. virtual QList< Command > transition (const QwtEventPattern &, const QEvent *) Transition. Additional Inherited Members Detailed Description A state machine for indicating mouse movements. QwtPickerTrackerMachine supports displaying information corresponding to mouse movements, but is not…
QwtPickerPolygonMachine – A state machine for polygon selections. Synopsis #include <qwt_picker_machine.h> Inherits QwtPickerMachine. Public Member Functions QwtPickerPolygonMachine () Constructor. virtual QList< Command > transition (const QwtEventPattern &, const QEvent *) Transition. Additional Inherited Members Detailed Description A state machine for polygon selections. Pressing QwtEventPattern::MouseSelect1 or QwtEventPattern::KeySelect1 starts the selection and selects the first point, or…
QwtPickerMachine – A state machine for QwtPicker selections. Synopsis #include <qwt_picker_machine.h> Inherited by QwtPickerClickPointMachine, QwtPickerClickRectMachine, QwtPickerDragLineMachine, QwtPickerDragPointMachine, QwtPickerDragRectMachine, QwtPickerPolygonMachine, and QwtPickerTrackerMachine. Public Types enum SelectionType { NoSelection = -1, PointSelection, RectSelection, PolygonSelection } enum Command { Begin, Append, Move, Remove, End } Commands – the output of a state machine. Public Member Functions QwtPickerMachine (SelectionType)…
QwtPickerDragRectMachine – A state machine for rectangle selections. Synopsis #include <qwt_picker_machine.h> Inherits QwtPickerMachine. Public Member Functions QwtPickerDragRectMachine () Constructor. virtual QList< Command > transition (const QwtEventPattern &, const QEvent *) Transition. Additional Inherited Members Detailed Description A state machine for rectangle selections. Pressing QwtEventPattern::MouseSelect1 selects the first point, releasing it the second point. Pressing QwtEventPattern::KeySelect1…
QwtPickerDragPointMachine – A state machine for point selections. Synopsis #include <qwt_picker_machine.h> Inherits QwtPickerMachine. Public Member Functions QwtPickerDragPointMachine () Constructor. virtual QList< Command > transition (const QwtEventPattern &, const QEvent *) Transition. Additional Inherited Members Detailed Description A state machine for point selections. Pressing QwtEventPattern::MouseSelect1 or QwtEventPattern::KeySelect1 starts the selection, releasing QwtEventPattern::MouseSelect1 or a second press…
QwtPickerDragLineMachine – A state machine for line selections. Synopsis #include <qwt_picker_machine.h> Inherits QwtPickerMachine. Public Member Functions QwtPickerDragLineMachine () Constructor. virtual QList< Command > transition (const QwtEventPattern &, const QEvent *) Transition. Additional Inherited Members Detailed Description A state machine for line selections. Pressing QwtEventPattern::MouseSelect1 selects the first point, releasing it the second point. Pressing QwtEventPattern::KeySelect1…
QwtPickerDragLineMachine – A state machine for line selections. Synopsis #include <qwt_picker_machine.h> Inherits QwtPickerMachine. Public Member Functions QwtPickerDragLineMachine () Constructor. virtual QList< Command > transition (const QwtEventPattern &, const QEvent *) Transition. Additional Inherited Members Detailed Description A state machine for line selections. Pressing QwtEventPattern::MouseSelect1 selects the first point, releasing it the second point. Pressing QwtEventPattern::KeySelect1…
QwtPickerClickRectMachine – A state machine for rectangle selections. Synopsis #include <qwt_picker_machine.h> Inherits QwtPickerMachine. Public Member Functions QwtPickerClickRectMachine () Constructor. virtual QList< Command > transition (const QwtEventPattern &, const QEvent *) Transition. Additional Inherited Members Detailed Description A state machine for rectangle selections. Pressing QwtEventPattern::MouseSelect1 starts the selection, releasing it selects the first point. Pressing it…
QwtPickerClickPointMachine – A state machine for point selections. Synopsis #include <qwt_picker_machine.h> Inherits QwtPickerMachine. Public Member Functions QwtPickerClickPointMachine () Constructor. virtual QList< Command > transition (const QwtEventPattern &, const QEvent *) Transition. Additional Inherited Members Detailed Description A state machine for point selections. Pressing QwtEventPattern::MouseSelect1 or QwtEventPattern::KeySelect1 selects a point. See Also: QwtEventPattern::MousePatternCode, QwtEventPattern::KeyPatternCode Author Generated…
QwtPicker – QwtPicker provides selections on a widget. Synopsis #include <qwt_picker.h> Inherits QObject, and QwtEventPattern. Inherited by QwtPlotPicker. Public Types enum RubberBand { NoRubberBand = 0, HLineRubberBand, VLineRubberBand, CrossRubberBand, RectRubberBand, EllipseRubberBand, PolygonRubberBand, UserRubberBand = 100 } enum DisplayMode { AlwaysOff, AlwaysOn, ActiveOnly } Display mode. enum ResizeMode { Stretch, KeepSize } Public Slots void setEnabled…
QwtPanner – QwtPanner provides panning of a widget. Synopsis #include <qwt_panner.h> Inherits QWidget. Inherited by QwtPlotPanner. Signals void panned (int dx, int dy) void moved (int dx, int dy) Public Member Functions QwtPanner (QWidget *parent) virtual ~QwtPanner () Destructor. void setEnabled (bool) En/disable the panner. bool isEnabled () const void setMouseButton (Qt::MouseButton, Qt::KeyboardModifiers=Qt::NoModifier) void getMouseButton…
QwtPainterCommand – Synopsis #include <qwt_painter_command.h> Classes struct ImageData Attributes how to paint a QImage. struct PixmapData Attributes how to paint a QPixmap. struct StateData Attributes of a state change. Public Types enum Type { Invalid = -1, Path, Pixmap, Image, State } Type of the paint command. Public Member Functions QwtPainterCommand () Construct an invalid…
QwtPainter – A collection of QPainter workarounds. Synopsis #include <qwt_painter.h> Static Public Member Functions static void setPolylineSplitting (bool) En/Disable line splitting for the raster paint engine. static bool polylineSplitting () static void setRoundingAlignment (bool) static bool roundingAlignment () static bool roundingAlignment (QPainter *) static void drawText (QPainter *, double x, double y, const QString &)…
QwtOHLCSample – Open-High-Low-Close sample used in financial charts. Synopsis #include <qwt_samples.h> Public Member Functions QwtOHLCSample (double time=0.0, double open=0.0, double high=0.0, double low=0.0, double close=0.0) QwtInterval boundingInterval () const Calculate the bounding interval of the OHLC values. bool isValid () const Check if a sample is valid. Public Attributes double time double open Opening price….
QwtNullTransform – Null transformation. Synopsis #include <qwt_transform.h> Inherits QwtTransform. Public Member Functions QwtNullTransform () Constructor. virtual ~QwtNullTransform () Destructor. virtual double transform (double value) const virtual double invTransform (double value) const virtual QwtTransform * copy () const Detailed Description Null transformation. QwtNullTransform returns the values unmodified. Member Function Documentation QwtTransform * QwtNullTransform::copy () const [virtual]…
QwtNullPaintDevice – A null paint device doing nothing. Synopsis #include <qwt_null_paintdevice.h> Inherits QPaintDevice. Inherited by QwtGraphic, and QwtStyleSheetRecorder. Public Types enum Mode { NormalMode, PolygonPathMode, PathMode } Render mode. Public Member Functions QwtNullPaintDevice () Constructor. virtual ~QwtNullPaintDevice () Destructor. void setMode (Mode) Mode mode () const virtual QPaintEngine * paintEngine () const See QPaintDevice::paintEngine() virtual…
QwtMetricsMap – A Map to translate between layout, screen and paint device metrics. Synopsis #include <qwt_layout_metrics.h> Public Member Functions bool isIdentity () const void setMetrics (const QPaintDevice *layoutMetrics, const QPaintDevice *deviceMetrics) int layoutToDeviceX (int x) const int deviceToLayoutX (int x) const int screenToLayoutX (int x) const int layoutToScreenX (int x) const int layoutToDeviceY (int y)…
QwtMatrixRasterData – A class representing a matrix of values as raster data. Synopsis #include <qwt_matrix_raster_data.h> Inherits QwtRasterData. Public Types enum ResampleMode { NearestNeighbour, BilinearInterpolation } Resampling algorithm The default setting is NearestNeighbour;. Public Member Functions QwtMatrixRasterData () Constructor. virtual ~QwtMatrixRasterData () Destructor. void setResampleMode (ResampleMode mode) Set the resampling algorithm. ResampleMode resampleMode () const virtual…