QwtLegend Class Reference

List of all members.

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Detailed Description

The legend widget.

The QwtLegend widget is a tabular arrangement of legend items. Legend items might be any type of widget, but in general they will be a QwtLegendItem.

See also:

QwtLegendItem, QwtPlot

Definition at line 36 of file qwt_legend.h.

Public Types
enum	LegendDisplayPolicy {   NoIdentifier = 0,   FixedIdentifier = 1,   AutoIdentifier = 2 }
enum	LegendItemMode {   ReadOnlyItem,   ClickableItem,   CheckableItem }
Public Member Functions
	QwtLegend (QWidget *parent=NULL)
virtual	~QwtLegend ()
void	setDisplayPolicy (LegendDisplayPolicy policy, int mode)
LegendDisplayPolicy	displayPolicy () const
void	setItemMode (LegendItemMode)
LegendItemMode	itemMode () const
int	identifierMode () const
QWidget *	contentsWidget ()
const QWidget *	contentsWidget () const
void	insert (const QwtPlotItem *, QWidget *)
void	remove (const QwtPlotItem *)
QWidget *	find (const QwtPlotItem *) const
QwtPlotItem *	find (const QWidget *) const
virtual QList< QWidget * >	legendItems () const
void	clear ()
bool	isEmpty () const
uint	itemCount () const
virtual bool	eventFilter (QObject *, QEvent *)
virtual QSize	sizeHint () const
virtual int	heightForWidth (int w) const
QScrollBar *	horizontalScrollBar () const
QScrollBar *	verticalScrollBar () const
Protected Member Functions
virtual void	resizeEvent (QResizeEvent *)
virtual void	layoutContents ()

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Member Enumeration Documentation

enum QwtLegend::LegendDisplayPolicy

Display policy. NoIdentifier The client code is responsible how to display of each legend item. The Qwt library will not interfere. FixedIdentifier All legend items are displayed with the QwtLegendItem::IdentifierMode to be passed in 'mode'. AutoIdentifier Each legend item is displayed with a mode that is a bitwise or of QwtLegendItem::ShowLine (if its curve is drawn with a line) and QwtLegendItem::ShowSymbol (if its curve is drawn with symbols) and QwtLegendItem::ShowText (if the has a title). Default is AutoIdentifier. See also: setDisplayPolicy(), displayPolicy(), QwtLegendItem::IdentifierMode Definition at line 62 of file qwt_legend.h.

enum QwtLegend::LegendItemMode

Interaction mode for the legend items. Definition at line 70 of file qwt_legend.h.

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Constructor & Destructor Documentation

QwtLegend::QwtLegend (  QWidget *  parent = NULL  )  [explicit]

Parameters: parent  Parent widget Definition at line 258 of file qwt_legend.cpp.

QwtLegend::~QwtLegend (   )  [virtual]

Destructor. Definition at line 283 of file qwt_legend.cpp.

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Member Function Documentation

void QwtLegend::clear (   )

Remove all items. Definition at line 490 of file qwt_legend.cpp.

const QWidget * QwtLegend::contentsWidget (   )  const

The contents widget is the only child of the viewport() and the parent widget of all legend items. Definition at line 375 of file qwt_legend.cpp.

QWidget * QwtLegend::contentsWidget (   )

The contents widget is the only child of the viewport() and the parent widget of all legend items. Definition at line 355 of file qwt_legend.cpp. Referenced by insert(), and QwtPlot::printLegend().

QwtLegend::LegendDisplayPolicy QwtLegend::displayPolicy (   )  const

Returns: the legend display policy. Default is LegendDisplayPolicy::Auto. See also: setDisplayPolicy, LegendDisplayPolicy Definition at line 324 of file qwt_legend.cpp. Referenced by QwtPlotCurve::updateLegend().

QwtPlotItem * QwtLegend::find (  const QWidget *  legendItem  )  const

Find the widget that represents a plot item Parameters: plotItem  Plot item Returns: Widget on the legend, or NULL Definition at line 471 of file qwt_legend.cpp.

QWidget * QwtLegend::find (  const QwtPlotItem *  plotItem  )  const

Find the widget that represents a plot item Parameters: plotItem  Plot item Returns: Widget on the legend, or NULL Definition at line 460 of file qwt_legend.cpp. Referenced by QwtPlotItem::updateLegend(), and QwtPlotCurve::updateLegend().

int QwtLegend::heightForWidth (  int  width  )  const [virtual]

Returns: The preferred height, for the width w. Parameters: width  Width Definition at line 518 of file qwt_legend.cpp.

int QwtLegend::identifierMode (   )  const

Returns: the IdentifierMode to be used in combination with LegendDisplayPolicy::Fixed. Default is ShowLine | ShowSymbol | ShowText. Definition at line 346 of file qwt_legend.cpp. Referenced by QwtPlotCurve::updateLegend().

void QwtLegend::insert (  const QwtPlotItem *  plotItem, QWidget *  legendItem )

Insert a new item for a plot item Parameters: plotItem  Plot item legendItem  New legend item Note: The parent of item will be changed to QwtLegend::contentsWidget() Definition at line 386 of file qwt_legend.cpp. References contentsWidget(). Referenced by QwtPlotItem::updateLegend().

bool QwtLegend::isEmpty (   )  const

Return true, if there are no legend items. Definition at line 617 of file qwt_legend.cpp. Referenced by QwtPlotLayout::activate().

uint QwtLegend::itemCount (   )  const

Return the number of legend items. Definition at line 623 of file qwt_legend.cpp.

void QwtLegend::layoutContents (   )  [protected, virtual]

Adjust contents widget and item layout to the size of the viewport(). Definition at line 543 of file qwt_legend.cpp. Referenced by eventFilter().

void QwtLegend::remove (  const QwtPlotItem *  plotItem  )

Find the corresponding item for a plotItem and remove it from the item list. Parameters: plotItem  Plot item Definition at line 482 of file qwt_legend.cpp.

void QwtLegend::resizeEvent (  QResizeEvent *  e  )  [protected, virtual]

Resize event Parameters: e  Event Definition at line 654 of file qwt_legend.cpp.

void QwtLegend::setDisplayPolicy (  LegendDisplayPolicy  policy, int  mode )

Set the legend display policy to: Parameters: policy  Legend display policy mode  Identifier mode (or'd ShowLine, ShowSymbol, ShowText) See also: displayPolicy, LegendDisplayPolicy Definition at line 296 of file qwt_legend.cpp. References QwtPlotItem::updateLegend().

QSize QwtLegend::sizeHint (   )  const [virtual]

Return a size hint. Definition at line 506 of file qwt_legend.cpp.

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