QwtLegend (3)

#include <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 clear ()

QWidget * contentsWidget ()

const QWidget * contentsWidget () const

LegendDisplayPolicy displayPolicy () const

virtual bool eventFilter (QObject *, QEvent *)

QWidget * find (const QwtLegendItemManager *) const

QwtLegendItemManager * find (const QWidget *) const

virtual int heightForWidth (int w) const

QScrollBar * horizontalScrollBar () const

int identifierMode () const

void insert (const QwtLegendItemManager *, QWidget *)

bool isEmpty () const

uint itemCount () const

LegendItemMode itemMode () const

virtual QList< QWidget * > legendItems () const

void remove (const QwtLegendItemManager *)

void setDisplayPolicy (LegendDisplayPolicy policy, int mode)

void setItemMode (LegendItemMode)

virtual QSize sizeHint () const

QScrollBar * verticalScrollBar () const

Protected Member Functions

virtual void layoutContents ()

virtual void resizeEvent (QResizeEvent *)

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

enum \fBQwtLegend::LegendDisplayPolicy\fP

Display policy. .IP "•" 2 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

enum \fBQwtLegend::LegendItemMode\fP

Interaction mode for the legend items. .IP "•" 2 ReadOnlyItem

The legend item is not interactive, like a label

• ClickableItem

  The legend item is clickable, like a push button

• CheckableItem

  The legend item is checkable, like a checkable button

Default is ReadOnlyItem.

See also:

setItemMode(), itemMode(), QwtLegendItem::IdentifierMode QwtLegendItem::clicked(), QwtLegendItem::checked(), QwtPlot::legendClicked(), QwtPlot::legendChecked()

QwtLegend::QwtLegend (QWidget *parent = \fCNULL\fP)\fC [explicit]\fP

Constructor

Parameters:

parent Parent widget

QWidget * QwtLegend::contentsWidget ()

The contents widget is the only child of the viewport() and the parent widget of all legend items.

const QWidget * QwtLegend::contentsWidget () const

The contents widget is the only child of the viewport() and the parent widget of all legend items.

\fBQwtLegend::LegendDisplayPolicy\fP QwtLegend::displayPolicy () const

Returns:

the legend display policy. Default is LegendDisplayPolicy::Auto.

See also:

setDisplayPolicy(), LegendDisplayPolicy

bool QwtLegend::eventFilter (QObject *o, QEvent *e)\fC [virtual]\fP

Filter layout related events of QwtLegend::contentsWidget().

Parameters:

o Object to be filtered

e Event

QWidget * QwtLegend::find (const \fBQwtLegendItemManager\fP *plotItem) const

Find the widget that represents a plot item

Parameters:

plotItem Plot item

Returns:

Widget on the legend, or NULL

\fBQwtLegendItemManager\fP * QwtLegend::find (const QWidget *legendItem) const

Find the widget that represents a plot item

Parameters:

legendItem Legend item

Returns:

Widget on the legend, or NULL

int QwtLegend::heightForWidth (intwidth) const\fC [virtual]\fP

Returns:

The preferred height, for the width w.

Parameters:

width Width

QScrollBar * QwtLegend::horizontalScrollBar () const

Returns:

Horizontal scrollbar

See also:

verticalScrollBar()

int QwtLegend::identifierMode () const

Returns:

the IdentifierMode to be used in combination with LegendDisplayPolicy::Fixed.

Default is ShowLine | ShowSymbol | ShowText.

void QwtLegend::insert (const \fBQwtLegendItemManager\fP *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()

\fBQwtLegend::LegendItemMode\fP QwtLegend::itemMode () const

See also:

LegendItemMode

void QwtLegend::layoutContents ()\fC [protected]\fP, \fC [virtual]\fP

Adjust contents widget and item layout to the size of the viewport().

void QwtLegend::remove (const \fBQwtLegendItemManager\fP *plotItem)

Find the corresponding item for a plotItem and remove it from the item list.

Parameters:

plotItem Plot item

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

Resize event

Parameters:

e Resize event

void QwtLegend::setDisplayPolicy (\fBLegendDisplayPolicy\fPpolicy, intmode)

Set the legend display policy to:

Parameters:

policy Legend display policy

mode Identifier mode (or'd ShowLine, ShowSymbol, ShowText)

See also:

displayPolicy(), LegendDisplayPolicy

void QwtLegend::setItemMode (\fBLegendItemMode\fPmode)

See also:

LegendItemMode

QScrollBar * QwtLegend::verticalScrollBar () const

Returns:

Vertical scrollbar

See also:

horizontalScrollBar()

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