Linux Certif

Toute la documentation sur la certification Linux LPI

QwtLegend

NAME

QwtLegend -

SYNOPSIS

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, QwtLegendItemManager 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 QwtLegendItemManager *, QWidget *)

void remove (const QwtLegendItemManager *)

QWidget * find (const QwtLegendItemManager *) const

QwtLegendItemManager * 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 ()

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.

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.

Member Function Documentation

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 QwtLegendItemManager::updateLegend().

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().

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().

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().

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.

void QwtLegend::insert (const QwtLegendItemManager * 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(), and layoutContents().

Referenced by QwtPlotItem::updateLegend().

void QwtLegend::remove (const QwtLegendItemManager * 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.

QWidget * QwtLegend::find (const QwtLegendItemManager * 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 QwtPlotPrintFilter::reset(), QwtPlotItem::updateLegend(), and QwtPlotCurve::updateLegend().

QwtLegendItemManager * 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.

void QwtLegend::clear ()

Remove all items.

Definition at line 490 of file qwt_legend.cpp.

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(), and QwtPlot::print().

uint QwtLegend::itemCount () const

Return the number of legend items.

Definition at line 623 of file qwt_legend.cpp.

QSize QwtLegend::sizeHint () const [virtual]

Return a size hint.

Definition at line 506 of file qwt_legend.cpp.

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.

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

Resize event

Parameters:

e Event

Definition at line 654 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(), and insert().

Author

Generated automatically by Doxygen for Qwt User's Guide from the source code.