KPlotWidget

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#include <kplotwidget.h>

Inheritance diagram for KPlotWidget:

Public Types

enum  Axis { LeftAxis = 0, BottomAxis, RightAxis, TopAxis }
 
- Public Types inherited from QFrame
enum  Shadow
 
enum  Shape
 
enum  StyleMask
 
- Public Types inherited from QWidget
enum  RenderFlag
 
- Public Types inherited from QPaintDevice
enum  PaintDeviceMetric
 

Properties

QColor backgroundColor
 
int bottomPadding
 
QColor foregroundColor
 
bool grid
 
QColor gridColor
 
int leftPadding
 
bool objectToolTip
 
int rightPadding
 
int topPadding
 
- Properties inherited from QFrame
 frameRect
 
 frameShadow
 
 frameShape
 
 frameWidth
 
 lineWidth
 
 midLineWidth
 
- Properties inherited from QWidget
 acceptDrops
 
 accessibleDescription
 
 accessibleName
 
 autoFillBackground
 
 baseSize
 
 childrenRect
 
 childrenRegion
 
 contextMenuPolicy
 
 cursor
 
 enabled
 
 focus
 
 focusPolicy
 
 font
 
 frameGeometry
 
 frameSize
 
 fullScreen
 
 geometry
 
 height
 
 inputMethodHints
 
 isActiveWindow
 
 layoutDirection
 
 locale
 
 maximized
 
 maximumHeight
 
 maximumSize
 
 maximumWidth
 
 minimized
 
 minimumHeight
 
 minimumSize
 
 minimumSizeHint
 
 minimumWidth
 
 modal
 
 mouseTracking
 
 normalGeometry
 
 palette
 
 pos
 
 rect
 
 size
 
 sizeHint
 
 sizeIncrement
 
 sizePolicy
 
 statusTip
 
 styleSheet
 
 tabletTracking
 
 toolTip
 
 toolTipDuration
 
 updatesEnabled
 
 visible
 
 whatsThis
 
 width
 
 windowFilePath
 
 windowFlags
 
 windowIcon
 
 windowIconText
 
 windowModality
 
 windowModified
 
 windowOpacity
 
 windowTitle
 
 x
 
 y
 
- Properties inherited from QObject
 objectName
 

Public Slots

void setObjectToolTipShown (bool show)
 
void setShowGrid (bool show)
 

Public Member Functions

 KPlotWidget (QWidget *parent=nullptr)
 
 ~KPlotWidget () override
 
void addPlotObject (KPlotObject *object)
 
void addPlotObjects (const QList< KPlotObject * > &objects)
 
bool antialiasing () const
 
KPlotAxisaxis (Axis type)
 
const KPlotAxisaxis (Axis type) const
 
QColor backgroundColor () const
 
int bottomPadding () const
 
void clearSecondaryLimits ()
 
QRectF dataRect () const
 
QColor foregroundColor () const
 
QColor gridColor () const
 
bool isGridShown () const
 
bool isObjectToolTipShown () const
 
int leftPadding () const
 
QPointF mapToWidget (const QPointF &p) const
 
void maskAlongLine (const QPointF &p1, const QPointF &p2, float value=1.0f)
 
void maskRect (const QRectF &r, float value=1.0f)
 
QSize minimumSizeHint () const override
 
QRect pixRect () const
 
void placeLabel (QPainter *painter, KPlotPoint *pp)
 
QList< KPlotObject * > plotObjects () const
 
void removeAllPlotObjects ()
 
void replacePlotObject (int i, KPlotObject *o)
 
void resetPlot ()
 
void resetPlotMask ()
 
int rightPadding () const
 
QRectF secondaryDataRect () const
 
void setAntialiasing (bool b)
 
void setAutoDeletePlotObjects (bool autoDelete)
 
void setBackgroundColor (const QColor &bg)
 
void setBottomPadding (int padding)
 
void setDefaultPaddings ()
 
void setForegroundColor (const QColor &fg)
 
void setGridColor (const QColor &gc)
 
void setLeftPadding (int padding)
 
void setLimits (double x1, double x2, double y1, double y2)
 
void setRightPadding (int padding)
 
void setSecondaryLimits (double x1, double x2, double y1, double y2)
 
void setTopPadding (int padding)
 
QSize sizeHint () const override
 
int topPadding () const
 
- Public Member Functions inherited from QFrame
 QFrame (QWidget *parent, Qt::WindowFlags f)
 
QRect frameRect () const const
 
QFrame::Shadow frameShadow () const const
 
QFrame::Shape frameShape () const const
 
int frameStyle () const const
 
int frameWidth () const const
 
int lineWidth () const const
 
int midLineWidth () const const
 
void setFrameRect (const QRect &)
 
void setFrameShadow (QFrame::Shadow)
 
void setFrameShape (QFrame::Shape)
 
void setFrameStyle (int style)
 
void setLineWidth (int)
 
void setMidLineWidth (int)
 
- Public Member Functions inherited from QWidget
 QWidget (QWidget *parent, Qt::WindowFlags f)
 
bool acceptDrops () const const
 
QString accessibleDescription () const const
 
QString accessibleName () const const
 
QList< QAction * > actions () const const
 
void activateWindow ()
 
void addAction (QAction *action)
 
void addActions (QList< QAction * > actions)
 
void adjustSize ()
 
bool autoFillBackground () const const
 
QPalette::ColorRole backgroundRole () const const
 
QBackingStorebackingStore () const const
 
QSize baseSize () const const
 
QWidgetchildAt (int x, int y) const const
 
QWidgetchildAt (const QPoint &p) const const
 
QRect childrenRect () const const
 
QRegion childrenRegion () const const
 
void clearFocus ()
 
void clearMask ()
 
bool close ()
 
QMargins contentsMargins () const const
 
QRect contentsRect () const const
 
Qt::ContextMenuPolicy contextMenuPolicy () const const
 
QCursor cursor () const const
 
void customContextMenuRequested (const QPoint &pos)
 
WId effectiveWinId () const const
 
void ensurePolished () const const
 
Qt::FocusPolicy focusPolicy () const const
 
QWidgetfocusProxy () const const
 
QWidgetfocusWidget () const const
 
const QFontfont () const const
 
QFontInfo fontInfo () const const
 
QFontMetrics fontMetrics () const const
 
QPalette::ColorRole foregroundRole () const const
 
QRect frameGeometry () const const
 
QSize frameSize () const const
 
const QRectgeometry () const const
 
void getContentsMargins (int *left, int *top, int *right, int *bottom) const const
 
QPixmap grab (const QRect &rectangle)
 
void grabGesture (Qt::GestureType gesture, Qt::GestureFlags flags)
 
void grabKeyboard ()
 
void grabMouse ()
 
void grabMouse (const QCursor &cursor)
 
int grabShortcut (const QKeySequence &key, Qt::ShortcutContext context)
 
QGraphicsEffectgraphicsEffect () const const
 
QGraphicsProxyWidgetgraphicsProxyWidget () const const
 
bool hasEditFocus () const const
 
bool hasFocus () const const
 
virtual bool hasHeightForWidth () const const
 
bool hasMouseTracking () const const
 
bool hasTabletTracking () const const
 
int height () const const
 
virtual int heightForWidth (int w) const const
 
void hide ()
 
Qt::InputMethodHints inputMethodHints () const const
 
virtual QVariant inputMethodQuery (Qt::InputMethodQuery query) const const
 
void insertAction (QAction *before, QAction *action)
 
void insertActions (QAction *before, QList< QAction * > actions)
 
bool isActiveWindow () const const
 
bool isAncestorOf (const QWidget *child) const const
 
bool isEnabled () const const
 
bool isEnabledTo (const QWidget *ancestor) const const
 
bool isEnabledToTLW () const const
 
bool isFullScreen () const const
 
bool isHidden () const const
 
bool isMaximized () const const
 
bool isMinimized () const const
 
bool isModal () const const
 
bool isTopLevel () const const
 
bool isVisible () const const
 
bool isVisibleTo (const QWidget *ancestor) const const
 
bool isWindow () const const
 
bool isWindowModified () const const
 
QLayoutlayout () const const
 
Qt::LayoutDirection layoutDirection () const const
 
QLocale locale () const const
 
void lower ()
 
QPoint mapFrom (const QWidget *parent, const QPoint &pos) const const
 
QPoint mapFromGlobal (const QPoint &pos) const const
 
QPoint mapFromParent (const QPoint &pos) const const
 
QPoint mapTo (const QWidget *parent, const QPoint &pos) const const
 
QPoint mapToGlobal (const QPoint &pos) const const
 
QPoint mapToParent (const QPoint &pos) const const
 
QRegion mask () const const
 
int maximumHeight () const const
 
QSize maximumSize () const const
 
int maximumWidth () const const
 
int minimumHeight () const const
 
QSize minimumSize () const const
 
int minimumWidth () const const
 
void move (int x, int y)
 
void move (const QPoint &)
 
QWidgetnativeParentWidget () const const
 
QWidgetnextInFocusChain () const const
 
QRect normalGeometry () const const
 
void overrideWindowFlags (Qt::WindowFlags flags)
 
virtual QPaintEnginepaintEngine () const const override
 
const QPalettepalette () const const
 
QWidgetparentWidget () const const
 
QPoint pos () const const
 
QWidgetpreviousInFocusChain () const const
 
 QWIDGETSIZE_MAX QWIDGETSIZE_MAX
 
void raise ()
 
QRect rect () const const
 
void releaseKeyboard ()
 
void releaseMouse ()
 
void releaseShortcut (int id)
 
void removeAction (QAction *action)
 
void render (QPaintDevice *target, const QPoint &targetOffset, const QRegion &sourceRegion, QWidget::RenderFlags renderFlags)
 
void render (QPainter *painter, const QPoint &targetOffset, const QRegion &sourceRegion, QWidget::RenderFlags renderFlags)
 
void repaint ()
 
void repaint (int x, int y, int w, int h)
 
void repaint (const QRect &rect)
 
void repaint (const QRegion &rgn)
 
void resize (int w, int h)
 
void resize (const QSize &)
 
bool restoreGeometry (const QByteArray &geometry)
 
QByteArray saveGeometry () const const
 
QScreenscreen () const const
 
void scroll (int dx, int dy)
 
void scroll (int dx, int dy, const QRect &r)
 
void setAcceptDrops (bool on)
 
void setAccessibleDescription (const QString &description)
 
void setAccessibleName (const QString &name)
 
void setAttribute (Qt::WidgetAttribute attribute, bool on)
 
void setAutoFillBackground (bool enabled)
 
void setBackgroundRole (QPalette::ColorRole role)
 
void setBaseSize (int basew, int baseh)
 
void setBaseSize (const QSize &)
 
void setContentsMargins (const QMargins &margins)
 
void setContentsMargins (int left, int top, int right, int bottom)
 
void setContextMenuPolicy (Qt::ContextMenuPolicy policy)
 
void setCursor (const QCursor &)
 
void setDisabled (bool disable)
 
void setEditFocus (bool enable)
 
void setEnabled (bool)
 
void setFixedHeight (int h)
 
void setFixedSize (const QSize &s)
 
void setFixedSize (int w, int h)
 
void setFixedWidth (int w)
 
void setFocus (Qt::FocusReason reason)
 
void setFocus ()
 
void setFocusPolicy (Qt::FocusPolicy policy)
 
void setFocusProxy (QWidget *w)
 
void setFont (const QFont &)
 
void setForegroundRole (QPalette::ColorRole role)
 
void setGeometry (const QRect &)
 
void setGeometry (int x, int y, int w, int h)
 
void setGraphicsEffect (QGraphicsEffect *effect)
 
void setHidden (bool hidden)
 
void setInputMethodHints (Qt::InputMethodHints hints)
 
void setLayout (QLayout *layout)
 
void setLayoutDirection (Qt::LayoutDirection direction)
 
void setLocale (const QLocale &locale)
 
void setMask (const QBitmap &bitmap)
 
void setMask (const QRegion &region)
 
void setMaximumHeight (int maxh)
 
void setMaximumSize (int maxw, int maxh)
 
void setMaximumSize (const QSize &)
 
void setMaximumWidth (int maxw)
 
void setMinimumHeight (int minh)
 
void setMinimumSize (const QSize &)
 
void setMinimumSize (int minw, int minh)
 
void setMinimumWidth (int minw)
 
void setMouseTracking (bool enable)
 
void setPalette (const QPalette &)
 
void setParent (QWidget *parent, Qt::WindowFlags f)
 
void setParent (QWidget *parent)
 
void setShortcutAutoRepeat (int id, bool enable)
 
void setShortcutEnabled (int id, bool enable)
 
void setSizeIncrement (const QSize &)
 
void setSizeIncrement (int w, int h)
 
void setSizePolicy (QSizePolicy)
 
void setSizePolicy (QSizePolicy::Policy horizontal, QSizePolicy::Policy vertical)
 
void setStatusTip (const QString &)
 
void setStyle (QStyle *style)
 
void setStyleSheet (const QString &styleSheet)
 
void setTabletTracking (bool enable)
 
void setToolTip (const QString &)
 
void setToolTipDuration (int msec)
 
void setUpdatesEnabled (bool enable)
 
void setupUi (QWidget *widget)
 
virtual void setVisible (bool visible)
 
void setWhatsThis (const QString &)
 
void setWindowFilePath (const QString &filePath)
 
void setWindowFlag (Qt::WindowType flag, bool on)
 
void setWindowFlags (Qt::WindowFlags type)
 
void setWindowIcon (const QIcon &icon)
 
void setWindowIconText (const QString &)
 
void setWindowModality (Qt::WindowModality windowModality)
 
void setWindowModified (bool)
 
void setWindowOpacity (qreal level)
 
void setWindowRole (const QString &role)
 
void setWindowState (Qt::WindowStates windowState)
 
void setWindowTitle (const QString &)
 
void show ()
 
void showFullScreen ()
 
void showMaximized ()
 
void showMinimized ()
 
void showNormal ()
 
QSize size () const const
 
QSize sizeIncrement () const const
 
QSizePolicy sizePolicy () const const
 
void stackUnder (QWidget *w)
 
QString statusTip () const const
 
QStylestyle () const const
 
QString styleSheet () const const
 
bool testAttribute (Qt::WidgetAttribute attribute) const const
 
QString toolTip () const const
 
int toolTipDuration () const const
 
QWidgettopLevelWidget () const const
 
bool underMouse () const const
 
void ungrabGesture (Qt::GestureType gesture)
 
void unsetCursor ()
 
void unsetLayoutDirection ()
 
void unsetLocale ()
 
void update (int x, int y, int w, int h)
 
void update (const QRect &rect)
 
void update (const QRegion &rgn)
 
void update ()
 
void updateGeometry ()
 
bool updatesEnabled () const const
 
QRegion visibleRegion () const const
 
QString whatsThis () const const
 
int width () const const
 
QWidgetwindow () const const
 
QString windowFilePath () const const
 
Qt::WindowFlags windowFlags () const const
 
QWindowwindowHandle () const const
 
QIcon windowIcon () const const
 
void windowIconChanged (const QIcon &icon)
 
QString windowIconText () const const
 
void windowIconTextChanged (const QString &iconText)
 
Qt::WindowModality windowModality () const const
 
qreal windowOpacity () const const
 
QString windowRole () const const
 
Qt::WindowStates windowState () const const
 
QString windowTitle () const const
 
void windowTitleChanged (const QString &title)
 
Qt::WindowType windowType () const const
 
WId winId () const const
 
int x () const const
 
int y () const const
 
- Public Member Functions inherited from QObject
 QObject (QObject *parent)
 
bool blockSignals (bool block)
 
const QObjectListchildren () const const
 
QMetaObject::Connection connect (const QObject *sender, const char *signal, const char *method, Qt::ConnectionType type) const const
 
void deleteLater ()
 
void destroyed (QObject *obj)
 
bool disconnect (const char *signal, const QObject *receiver, const char *method) const const
 
bool disconnect (const QObject *receiver, const char *method) const const
 
void dumpObjectInfo ()
 
void dumpObjectInfo () const const
 
void dumpObjectTree ()
 
void dumpObjectTree () const const
 
QList< QByteArraydynamicPropertyNames () const const
 
virtual bool eventFilter (QObject *watched, QEvent *event)
 
findChild (const QString &name, Qt::FindChildOptions options) const const
 
QList< T > findChildren (const QString &name, Qt::FindChildOptions options) const const
 
QList< T > findChildren (const QRegExp &regExp, Qt::FindChildOptions options) const const
 
QList< T > findChildren (const QRegularExpression &re, Qt::FindChildOptions options) const const
 
bool inherits (const char *className) const const
 
void installEventFilter (QObject *filterObj)
 
bool isWidgetType () const const
 
bool isWindowType () const const
 
void killTimer (int id)
 
virtual const QMetaObjectmetaObject () const const
 
void moveToThread (QThread *targetThread)
 
QString objectName () const const
 
void objectNameChanged (const QString &objectName)
 
QObjectparent () const const
 
QVariant property (const char *name) const const
 
 Q_CLASSINFO (Name, Value)
 
 Q_DISABLE_COPY (Class)
 
 Q_DISABLE_COPY_MOVE (Class)
 
 Q_DISABLE_MOVE (Class)
 
 Q_EMIT Q_EMIT
 
 Q_ENUM (...)
 
 Q_ENUM_NS (...)
 
 Q_ENUMS (...)
 
 Q_FLAG (...)
 
 Q_FLAG_NS (...)
 
 Q_FLAGS (...)
 
 Q_GADGET Q_GADGET
 
 Q_INTERFACES (...)
 
 Q_INVOKABLE Q_INVOKABLE
 
 Q_NAMESPACE Q_NAMESPACE
 
 Q_NAMESPACE_EXPORT (EXPORT_MACRO)
 
 Q_OBJECT Q_OBJECT
 
 Q_PROPERTY (...)
 
 Q_REVISION Q_REVISION
 
 Q_SET_OBJECT_NAME (Object)
 
 Q_SIGNAL Q_SIGNAL
 
 Q_SIGNALS Q_SIGNALS
 
 Q_SLOT Q_SLOT
 
 Q_SLOTS Q_SLOTS
 
qFindChild (const QObject *obj, const QString &name)
 
QList< T > qFindChildren (const QObject *obj, const QRegExp &regExp)
 
QList< T > qFindChildren (const QObject *obj, const QString &name)
 
qobject_cast (QObject *object)
 
qobject_cast (const QObject *object)
 
 QT_NO_NARROWING_CONVERSIONS_IN_CONNECT QT_NO_NARROWING_CONVERSIONS_IN_CONNECT
 
void removeEventFilter (QObject *obj)
 
void setObjectName (const QString &name)
 
void setParent (QObject *parent)
 
bool setProperty (const char *name, const QVariant &value)
 
bool signalsBlocked () const const
 
int startTimer (int interval, Qt::TimerType timerType)
 
int startTimer (std::chrono::milliseconds time, Qt::TimerType timerType)
 
QThreadthread () const const
 
- Public Member Functions inherited from QPaintDevice
int colorCount () const const
 
int depth () const const
 
int devicePixelRatio () const const
 
qreal devicePixelRatioF () const const
 
int height () const const
 
int heightMM () const const
 
int logicalDpiX () const const
 
int logicalDpiY () const const
 
bool paintingActive () const const
 
int physicalDpiX () const const
 
int physicalDpiY () const const
 
int width () const const
 
int widthMM () const const
 

Protected Member Functions

virtual void drawAxes (QPainter *p)
 
bool event (QEvent *) override
 
void paintEvent (QPaintEvent *) override
 
QList< KPlotPoint * > pointsUnderPoint (const QPoint &p) const
 
void resizeEvent (QResizeEvent *) override
 
void setPixRect ()
 
- Protected Member Functions inherited from QFrame
virtual void changeEvent (QEvent *ev) override
 
void initStyleOption (QStyleOptionFrame *option) const const
 
- Protected Member Functions inherited from QWidget
virtual void actionEvent (QActionEvent *event)
 
virtual void closeEvent (QCloseEvent *event)
 
virtual void contextMenuEvent (QContextMenuEvent *event)
 
void create (WId window, bool initializeWindow, bool destroyOldWindow)
 
void destroy (bool destroyWindow, bool destroySubWindows)
 
virtual void dragEnterEvent (QDragEnterEvent *event)
 
virtual void dragLeaveEvent (QDragLeaveEvent *event)
 
virtual void dragMoveEvent (QDragMoveEvent *event)
 
virtual void dropEvent (QDropEvent *event)
 
virtual void enterEvent (QEvent *event)
 
virtual void focusInEvent (QFocusEvent *event)
 
bool focusNextChild ()
 
virtual bool focusNextPrevChild (bool next)
 
virtual void focusOutEvent (QFocusEvent *event)
 
bool focusPreviousChild ()
 
virtual void hideEvent (QHideEvent *event)
 
virtual void initPainter (QPainter *painter) const const override
 
virtual void inputMethodEvent (QInputMethodEvent *event)
 
virtual void keyPressEvent (QKeyEvent *event)
 
virtual void keyReleaseEvent (QKeyEvent *event)
 
virtual void leaveEvent (QEvent *event)
 
virtual int metric (QPaintDevice::PaintDeviceMetric m) const const override
 
virtual void mouseDoubleClickEvent (QMouseEvent *event)
 
virtual void mouseMoveEvent (QMouseEvent *event)
 
virtual void mousePressEvent (QMouseEvent *event)
 
virtual void mouseReleaseEvent (QMouseEvent *event)
 
virtual void moveEvent (QMoveEvent *event)
 
virtual bool nativeEvent (const QByteArray &eventType, void *message, long *result)
 
virtual void showEvent (QShowEvent *event)
 
virtual void tabletEvent (QTabletEvent *event)
 
void updateMicroFocus ()
 
virtual void wheelEvent (QWheelEvent *event)
 
- Protected Member Functions inherited from QObject
virtual void childEvent (QChildEvent *event)
 
virtual void connectNotify (const QMetaMethod &signal)
 
virtual void customEvent (QEvent *event)
 
virtual void disconnectNotify (const QMetaMethod &signal)
 
bool isSignalConnected (const QMetaMethod &signal) const const
 
int receivers (const char *signal) const const
 
QObjectsender () const const
 
int senderSignalIndex () const const
 
virtual void timerEvent (QTimerEvent *event)
 

Additional Inherited Members

- Static Public Member Functions inherited from QWidget
QWidgetcreateWindowContainer (QWindow *window, QWidget *parent, Qt::WindowFlags flags)
 
QWidgetfind (WId id)
 
QWidgetkeyboardGrabber ()
 
QWidgetmouseGrabber ()
 
void setTabOrder (QWidget *first, QWidget *second)
 
- Static Public Member Functions inherited from QObject
QMetaObject::Connection connect (const QObject *sender, const char *signal, const QObject *receiver, const char *method, Qt::ConnectionType type)
 
QMetaObject::Connection connect (const QObject *sender, const QMetaMethod &signal, const QObject *receiver, const QMetaMethod &method, Qt::ConnectionType type)
 
QMetaObject::Connection connect (const QObject *sender, PointerToMemberFunction signal, const QObject *receiver, PointerToMemberFunction method, Qt::ConnectionType type)
 
QMetaObject::Connection connect (const QObject *sender, PointerToMemberFunction signal, Functor functor)
 
QMetaObject::Connection connect (const QObject *sender, PointerToMemberFunction signal, const QObject *context, Functor functor, Qt::ConnectionType type)
 
bool disconnect (const QMetaObject::Connection &connection)
 
bool disconnect (const QObject *sender, const char *signal, const QObject *receiver, const char *method)
 
bool disconnect (const QObject *sender, PointerToMemberFunction signal, const QObject *receiver, PointerToMemberFunction method)
 
bool disconnect (const QObject *sender, const QMetaMethod &signal, const QObject *receiver, const QMetaMethod &method)
 
QString tr (const char *sourceText, const char *disambiguation, int n)
 
QString trUtf8 (const char *sourceText, const char *disambiguation, int n)
 
- Public Attributes inherited from QFrame
 Box
 
 HLine
 
 NoFrame
 
 Panel
 
 Plain
 
 Raised
 
 Shadow_Mask
 
 Shape_Mask
 
 StyledPanel
 
 Sunken
 
 VLine
 
 WinPanel
 
- Public Attributes inherited from QWidget
 DrawChildren
 
 DrawWindowBackground
 
 IgnoreMask
 
typedef RenderFlags
 
- Public Attributes inherited from QObject
typedef QObjectList
 
- Public Attributes inherited from QPaintDevice
 PdmDepth
 
 PdmDevicePixelRatio
 
 PdmDevicePixelRatioScaled
 
 PdmDpiX
 
 PdmDpiY
 
 PdmHeight
 
 PdmHeightMM
 
 PdmNumColors
 
 PdmPhysicalDpiX
 
 PdmPhysicalDpiY
 
 PdmWidth
 
 PdmWidthMM
 

Detailed Description

Generic data plotting widget.

Widget for drawing plots. The basic idea behind KPlotWidget is that you don't have to worry about any transformation from your data's natural units to screen pixel coordinates; this is handled internally by the widget.

Data to be plotted are represented by one or more instances of KPlotObject. KPlotObject contains a list of QPointFs to be plotted (again, in the data's natural units), as well as information about how the data are to be rendered in the plot (i.e., as separate points or connected by lines? With what color and point style? etc). See KPlotObject for more information.

KPlotWidget automatically adds axis labels with tickmarks and tick labels. These are encapsulated in the KPlotAxis class. All you have to do is set the limits of the plotting area in data units, and KPlotWidget wil figure out the optimal positions and labels for the tickmarks on the axes.

Example of usage:

// setting our limits for the plot
kpw->setLimits( 1.0, 5.0, 1.0, 25.0 );
// creating a plot object whose points are connected by red lines ...
// ... adding some points to it ...
for ( float x = 1.0; x <= 5.0; x += 0.1 )
kpo->addPoint( x, x*x );
// ... and adding the object to the plot widget
kpw->addPlotObject( kpo );
Note
KPlotWidget will take ownership of the objects added to it, so when clearing the objects list (eg with removeAllPlotObjects()) any previous reference to a KPlotObject already added to a KPlotWidget will be invalid. You can disable this behavior by using setAutoDelete(false).
Author
Jason Harris

Definition at line 67 of file kplotwidget.h.

Member Enumeration Documentation

The four types of plot axes.

Enumerator
LeftAxis 

the left axis

BottomAxis 

the bottom axis

RightAxis 

the right axis

TopAxis 

the top axis

Definition at line 94 of file kplotwidget.h.

Constructor & Destructor Documentation

KPlotWidget::KPlotWidget ( QWidget parent = nullptr)
explicit

Constructor.

Parameters
parentthe parent widget

Definition at line 96 of file kplotwidget.cpp.

KPlotWidget::~KPlotWidget ( )
override

Destructor.

Definition at line 110 of file kplotwidget.cpp.

Member Function Documentation

void KPlotWidget::addPlotObject ( KPlotObject object)

Add an item to the list of KPlotObjects to be plotted.

The widget takes ownership of the plot object, unless auto-delete was disabled.

Parameters
objectthe KPlotObject to be added

Definition at line 221 of file kplotwidget.cpp.

void KPlotWidget::addPlotObjects ( const QList< KPlotObject * > &  objects)

Add more than one KPlotObject at one time.

The widget takes ownership of the plot object, unless auto-delete was disabled.

Parameters
objectsthe list of KPlotObjects to be added

Definition at line 231 of file kplotwidget.cpp.

bool KPlotWidget::antialiasing ( ) const
Returns
whether the antialiasing is active Antialiasing is not active by default.

Definition at line 356 of file kplotwidget.cpp.

KPlotAxis * KPlotWidget::axis ( Axis  type)
Returns
the axis of the specified type, or 0 if no axis has been set.
See also
Axis

Definition at line 378 of file kplotwidget.cpp.

const KPlotAxis * KPlotWidget::axis ( Axis  type) const
Returns
the axis of the specified type, or 0 if no axis has been set.
See also
Axis

Definition at line 384 of file kplotwidget.cpp.

QColor KPlotWidget::backgroundColor ( ) const
Returns
the background color of the plot.

The default color is black.

int KPlotWidget::bottomPadding ( ) const
Returns
the number of pixels below the plot area. Padding values are set to -1 by default; if unchanged, this function will try to guess a good value, based on whether ticklabels and/or axis labels are to be drawn.
void KPlotWidget::clearSecondaryLimits ( )

Unset the secondary limits, so the top and right axes show the same tickmarks as the bottom and left axes (no tickmark labels will be drawn for the top and right axes in this case)

Definition at line 202 of file kplotwidget.cpp.

QRectF KPlotWidget::dataRect ( ) const
Returns
the rectangle representing the boundaries of the current plot, in natural data units.
See also
setLimits()

Definition at line 211 of file kplotwidget.cpp.

void KPlotWidget::drawAxes ( QPainter p)
protectedvirtual

Draws the plot axes and axis labels.

Internal use only; one should simply call update() to draw the widget with axes and all objects.

Parameters
ppointer to the painter on which we are drawing

Definition at line 741 of file kplotwidget.cpp.

bool KPlotWidget::event ( QEvent e)
overrideprotectedvirtual

Generic event handler.

Reimplemented from QFrame.

Definition at line 410 of file kplotwidget.cpp.

QColor KPlotWidget::foregroundColor ( ) const
Returns
the foreground color, used for axes, tickmarks and associated labels.

The default color is white.

QColor KPlotWidget::gridColor ( ) const
Returns
the grid color.

The default color is gray.

bool KPlotWidget::isGridShown ( ) const
Returns
whether the grid lines are shown Grid lines are not shown by default.

Definition at line 346 of file kplotwidget.cpp.

bool KPlotWidget::isObjectToolTipShown ( ) const
Returns
whether the tooltip for the point objects is shown. Tooltips are enabled by default.

Definition at line 351 of file kplotwidget.cpp.

int KPlotWidget::leftPadding ( ) const
Returns
the number of pixels to the left of the plot area.

Padding values are set to -1 by default; if unchanged, this function will try to guess a good value, based on whether ticklabels and/or axis labels need to be drawn.

QPointF KPlotWidget::mapToWidget ( const QPointF p) const

Map a coordinate.

Parameters
pfrom the data rect to the physical pixel rect. Used mainly when drawing.
pthe point to be converted, in natural data units
Returns
the coordinate in the pixel coordinate system

Definition at line 442 of file kplotwidget.cpp.

void KPlotWidget::maskAlongLine ( const QPointF p1,
const QPointF p2,
float  value = 1.0f 
)

Indicate that object labels should try to avoid the line joining the two given points (in pixel coordinates).

Note
You should not normally call this function directly. It is called by KPlotObject when lines are drawn in the plot.
Parameters
p1the starting point for the line
p2the ending point for the line
valueAllows you to determine how strongly the line should be avoided. Larger values are avoided more strongly.

Definition at line 464 of file kplotwidget.cpp.

void KPlotWidget::maskRect ( const QRectF r,
float  value = 1.0f 
)

Indicate that object labels should try to avoid the given rectangle in the plot.

The rectangle is in pixel coordinates.

Note
You should not normally call this function directly. It is called by KPlotObject when points, bars and labels are drawn.
Parameters
rthe rectangle defining the region in the plot that text labels should avoid (in pixel coordinates)
valueAllows you to determine how strongly the rectangle should be avoided. Larger values are avoided more strongly.

Definition at line 449 of file kplotwidget.cpp.

QSize KPlotWidget::minimumSizeHint ( ) const
overridevirtual
Returns
suggested minimum size for the plot widget

Reimplemented from QWidget.

Definition at line 115 of file kplotwidget.cpp.

void KPlotWidget::paintEvent ( QPaintEvent e)
overrideprotectedvirtual

The paint event handler, executed when update() or repaint() is called.

Reimplemented from QFrame.

Definition at line 711 of file kplotwidget.cpp.

QRect KPlotWidget::pixRect ( ) const
Returns
the rectangle representing the boundaries of the current plot, in screen pixel units.

Definition at line 390 of file kplotwidget.cpp.

void KPlotWidget::placeLabel ( QPainter painter,
KPlotPoint pp 
)

Place an object label optimally in the plot.

This function will attempt to place the label as close as it can to the point to which the label belongs, while avoiding overlap with regions of the plot that have been masked.

Note
You should not normally call this function directly. It is called internally in KPlotObject::draw().
Parameters
painterPointer to the painter on which to draw the label
pppointer to the KPlotPoint whose label is to be drawn.

Definition at line 527 of file kplotwidget.cpp.

QList< KPlotObject * > KPlotWidget::plotObjects ( ) const
Returns
the current list of plot objects

Definition at line 247 of file kplotwidget.cpp.

QList< KPlotPoint * > KPlotWidget::pointsUnderPoint ( const QPoint p) const
protected
Returns
a list of points in the plot which are within 4 pixels of the screen position given as an argument.
Parameters
pThe screen position from which to check for plot points.

Definition at line 395 of file kplotwidget.cpp.

void KPlotWidget::removeAllPlotObjects ( )

Removes all plot objects that were added to the widget.

If auto-delete was not disabled, the plot objects are deleted.

Definition at line 257 of file kplotwidget.cpp.

void KPlotWidget::replacePlotObject ( int  i,
KPlotObject o 
)

Replace an item in the KPlotObject list.

Parameters
ithe index of the item to be replaced
opointer to the replacement KPlotObject
Since
5.12, if auto-deletion is enabled, the previous plot object is deleted. Call setAutoDeletePlotObjects(false) if you want to swap between available plot objects and therefore you want to handle deletion externally.

Definition at line 297 of file kplotwidget.cpp.

void KPlotWidget::resetPlot ( )

Clear the object list, reset the data limits, and remove axis labels If auto-delete was not disabled, the plot objects are deleted.

Definition at line 278 of file kplotwidget.cpp.

void KPlotWidget::resetPlotMask ( )

Reset the mask used for non-overlapping labels so that all regions of the plot area are considered empty.

Definition at line 270 of file kplotwidget.cpp.

void KPlotWidget::resizeEvent ( QResizeEvent e)
overrideprotectedvirtual

The resize event handler, called when the widget is resized.

Reimplemented from QWidget.

Definition at line 427 of file kplotwidget.cpp.

int KPlotWidget::rightPadding ( ) const
Returns
the number of pixels to the right of the plot area. Padding values are set to -1 by default; if unchanged, this function will try to guess a good value, based on whether ticklabels and/or axis labels are to be drawn.
QRectF KPlotWidget::secondaryDataRect ( ) const
Returns
the rectangle representing the boundaries of the secondary data limits, if they have been set. Otherwise, this function behaves the same as dataRect().
See also
setSecondaryLimits()

Definition at line 216 of file kplotwidget.cpp.

void KPlotWidget::setAntialiasing ( bool  b)

Toggle antialiased drawing.

Parameters
bif true, the plot graphics will be antialiased.

Definition at line 361 of file kplotwidget.cpp.

void KPlotWidget::setAutoDeletePlotObjects ( bool  autoDelete)

Enables auto-deletion of plot objects if autoDelete is true; otherwise auto-deletion is disabled.

Auto-deletion is enabled by default.

Since
5.12

Definition at line 252 of file kplotwidget.cpp.

void KPlotWidget::setBackgroundColor ( const QColor bg)

Set the background color.

Parameters
bgthe new background color

Definition at line 328 of file kplotwidget.cpp.

void KPlotWidget::setBottomPadding ( int  padding)

Set the number of pixels below the plot area.

Set this to -1 to revert to automatic determination of padding values.

Definition at line 1015 of file kplotwidget.cpp.

void KPlotWidget::setDefaultPaddings ( )

Revert all four padding values to -1, so that they will be automatically determined.

Definition at line 1020 of file kplotwidget.cpp.

void KPlotWidget::setForegroundColor ( const QColor fg)

Set the foreground color.

Parameters
fgthe new foreground color

Definition at line 334 of file kplotwidget.cpp.

void KPlotWidget::setGridColor ( const QColor gc)

Set the grid color.

Parameters
gcthe new grid color

Definition at line 340 of file kplotwidget.cpp.

void KPlotWidget::setLeftPadding ( int  padding)

Set the number of pixels to the left of the plot area.

Set this to -1 to revert to automatic determination of padding values.

Definition at line 1000 of file kplotwidget.cpp.

void KPlotWidget::setLimits ( double  x1,
double  x2,
double  y1,
double  y2 
)

Set new data limits for the plot.

Parameters
x1the minimum X value in data units
x2the maximum X value in data units
y1the minimum Y value in data units
y2the maximum Y value in data units

Definition at line 125 of file kplotwidget.cpp.

void KPlotWidget::setObjectToolTipShown ( bool  show)
slot

Toggle the display of a tooltip for point objects.

Parameters
showwhether show the tooltip.
See also
isObjectToolTipShown()

Definition at line 373 of file kplotwidget.cpp.

void KPlotWidget::setPixRect ( )
protected

Synchronize the PixRect with the current widget size and padding settings.

Definition at line 434 of file kplotwidget.cpp.

void KPlotWidget::setRightPadding ( int  padding)

Set the number of pixels to the right of the plot area.

Set this to -1 to revert to automatic determination of padding values.

Definition at line 1005 of file kplotwidget.cpp.

void KPlotWidget::setSecondaryLimits ( double  x1,
double  x2,
double  y1,
double  y2 
)

Reset the secondary data limits, which control the values displayed along the top and right axes.

All data points are plotted using the coordinates defined by setLimits(), so this function is only useful for showing alternate tickmark labels along the top and right edges. For example, if you were plotting temperature on the X-axis, you could use Centigrade units for the primary (bottom) axis, using setLimits( 0.0, 100.0, 0.0, 1.0 ). If you also wanted to show Farenheit units along the secondary (top) axis, you would additionally use setSecondaryLimits( 32.0, 212.0, 0.0, 1.0 ). The data added to the plot would have x-coordinates in Centigrade degrees.

Parameters
x1the minimum X value in secondary data units
x2the maximum X value in secondary data units
y1the minimum Y value in secondary data units
y2the maximum Y value in secondary data units
See also
setLimits()

Definition at line 168 of file kplotwidget.cpp.

void KPlotWidget::setShowGrid ( bool  show)
slot

Toggle whether grid lines are drawn at major tickmarks.

Parameters
showif true, grid lines will be drawn.
See also
isGridShown()

Definition at line 367 of file kplotwidget.cpp.

void KPlotWidget::setTopPadding ( int  padding)

Set the number of pixels above the plot area.

Set this to -1 to revert to automatic determination of padding values.

Definition at line 1010 of file kplotwidget.cpp.

QSize KPlotWidget::sizeHint ( void  ) const
overridevirtual
Returns
suggested size for the plot widget

Reimplemented from QFrame.

Definition at line 120 of file kplotwidget.cpp.

int KPlotWidget::topPadding ( ) const
Returns
the number of pixels above the plot area. Padding values are set to -1 by default; if unchanged, this function will try to guess a good value, based on whether ticklabels and/or axis labels are to be drawn.

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