QwtLegendItem - Man Page


QwtLegendItem —

A legend label.  


#include <qwt_legend_item.h>

Inherits QwtTextLabel.

Public Types

enum IdentifierMode { NoIdentifier =  0, ShowLine =  1, ShowSymbol =  2, ShowText =  4 }

Public Slots

void clear ()
void setChecked (bool on)
void setText (const QString &, QwtText::TextFormat textFormat=QwtText::AutoText)


void checked (bool)
void clicked ()
void pressed ()
void released ()

Public Member Functions

const QPen & curvePen () const
virtual void drawIdentifier (QPainter *, const QRect &) const
virtual void drawItem (QPainter *p, const QRect &) const
virtual int heightForWidth (int) const
int identifierMode () const
int identifierWidth () const
int indent () const
bool isChecked () const
QwtLegend::LegendItemMode itemMode () const
int margin () const
virtual QSize minimumSizeHint () const
QwtLegendItem (QWidget *parent=0)
QwtLegendItem (const QwtSymbol &, const QPen &, const QwtText &, QWidget *parent=0)
void setCurvePen (const QPen &)
void setIdentifierMode (int)
void setIdentifierWidth (int width)
void setIndent (int)
void setItemMode (QwtLegend::LegendItemMode)
void setMargin (int)
void setSpacing (int spacing)
void setSymbol (const QwtSymbol &)
virtual void setText (const QwtText &)
virtual QSize sizeHint () const
int spacing () const
const QwtSymbol & symbol () const
const QwtText & text () const
QRect textRect () const
virtual ~QwtLegendItem ()

Protected Member Functions

virtual void drawContents (QPainter *)
virtual void drawText (QPainter *, const QRect &)
bool isDown () const
virtual void keyPressEvent (QKeyEvent *)
virtual void keyReleaseEvent (QKeyEvent *)
virtual void mousePressEvent (QMouseEvent *)
virtual void mouseReleaseEvent (QMouseEvent *)
virtual void paintEvent (QPaintEvent *)
void setDown (bool)

Detailed Description

A legend label.

QwtLegendItem represents a curve on a legend. It displays an curve identifier with an explaining text. The identifier might be a combination of curve symbol and line. In readonly mode it behaves like a label, otherwise like an unstylish push button.

See also:

QwtLegend, QwtPlotCurve

Member Enumeration Documentation

enum QwtLegendItem::IdentifierMode

Identifier mode. Default is ShowLine | ShowText

See also:

identifierMode(), setIdentifierMode()

Constructor & Destructor Documentation

QwtLegendItem::QwtLegendItem (QWidget *parent = 0) [explicit] Parameters

parent Parent widget

QwtLegendItem::QwtLegendItem (const QwtSymbol &symbol, const QPen &curvePen, const QwtText &text, QWidget *parent = 0) [explicit] Parameters

symbol Curve symbol
curvePen Curve pen
text Label text
parent Parent widget

QwtLegendItem::~QwtLegendItem () [virtual]


Member Function Documentation

void QwtLegendItem::checked (bool) [signal]

Signal, when the legend item has been toggled.

void QwtTextLabel::clear () [slot, inherited]

Clear the text and all QwtText attributes.

void QwtLegendItem::clicked () [signal]

Signal, when the legend item has been clicked.

const QPen & QwtLegendItem::curvePen () const Returns

The curve pen.

See also:


void QwtTextLabel::drawContents (QPainter *painter) [protected, virtual, inherited]

Redraw the text and focus indicator.

void QwtLegendItem::drawIdentifier (QPainter *painter, const QRect &rect) const [virtual] Paint the identifier to a given rect.


painter Painter
rect Rect where to paint

void QwtLegendItem::drawItem (QPainter *painter, const QRect &rect) const [virtual] Draw the legend item to a given rect.


painter Painter
rect Rect where to paint the button

void QwtLegendItem::drawText (QPainter *painter, const QRect &textRect) [protected, virtual]

Redraw the text.

Reimplemented from QwtTextLabel.

int QwtTextLabel::heightForWidth (intwidth) const [virtual, inherited] Returns the preferred height for this widget, given the width.


width Width

int QwtLegendItem::identifierMode () const Or'd values of IdentifierMode.

See also:

setIdentifierMode(), IdentifierMode

int QwtLegendItem::identifierWidth () const Return the width of the identifier

See also:


int QwtTextLabel::indent () const [inherited]

Return label's text indent in pixels.

bool QwtLegendItem::isChecked () const

Return true, if the item is checked.

bool QwtLegendItem::isDown () const [protected]

Return true, if the item is down.

QwtLegend::LegendItemMode QwtLegendItem::itemMode () const Return the item mode

See also:


void QwtLegendItem::keyPressEvent (QKeyEvent *e) [protected, virtual]

Handle key press events.

void QwtLegendItem::keyReleaseEvent (QKeyEvent *e) [protected, virtual]

Handle key release events.

int QwtTextLabel::margin () const [inherited]

Return label's text indent in pixels.

QSize QwtTextLabel::minimumSizeHint () const [virtual, inherited]

Return a minimum size hint.

void QwtLegendItem::mousePressEvent (QMouseEvent *e) [protected, virtual]

Handle mouse press events.

void QwtLegendItem::mouseReleaseEvent (QMouseEvent *e) [protected, virtual]

Handle mouse release events.

void QwtLegendItem::paintEvent (QPaintEvent *e) [protected, virtual]

Paint event.

Reimplemented from QwtTextLabel.

void QwtLegendItem::pressed () [signal]

Signal, when the legend item has been pressed.

void QwtLegendItem::released () [signal]

Signal, when the legend item has been relased.

void QwtLegendItem::setChecked (boolon) [slot] Check/Uncheck a the item


on check/uncheck

See also:


void QwtLegendItem::setCurvePen (const QPen &pen) Set curve pen.


pen Curve pen

See also:


void QwtLegendItem::setDown (booldown) [protected]

Set the item being down.

void QwtLegendItem::setIdentifierMode (intmode) Set identifier mode. Default is ShowLine | ShowText.


mode Or'd values of IdentifierMode

See also:


void QwtLegendItem::setIdentifierWidth (intwidth) Set the width for the identifier Default is 8 pixels


width New width

See also:

identifierMode(), identifierWidth()

void QwtTextLabel::setIndent (intindent) [inherited] Set label's text indent in pixels


indent Indentation in pixels

void QwtLegendItem::setItemMode (QwtLegend::LegendItemModemode) Set the item mode The default is QwtLegend::ReadOnlyItem


mode Item mode

See also:


void QwtTextLabel::setMargin (intmargin) [inherited] Set label's margin in pixels


margin Margin in pixels

void QwtLegendItem::setSpacing (intspacing) Change the spacing


spacing Spacing

See also:

spacing(), identifierWidth(), QwtTextLabel::margin()

void QwtLegendItem::setSymbol (const QwtSymbol &symbol) Set curve symbol.


symbol Symbol

See also:


void QwtLegendItem::setText (const QwtText &text) [virtual] Set the text to the legend item


text Text label

See also:


Reimplemented from QwtTextLabel.

void QwtTextLabel::setText (const QString &text, QwtText::TextFormattextFormat = QwtText::AutoText) [slot, inherited] Change the label's text, keeping all other QwtText attributes


text New text
textFormat Format of text

See also:


QSize QwtLegendItem::sizeHint () const [virtual]

Return a size hint.

Reimplemented from QwtTextLabel.

int QwtLegendItem::spacing () const Return the spacing

See also:

setSpacing(), identifierWidth(), QwtTextLabel::margin()

const QwtSymbol & QwtLegendItem::symbol () const Returns

The curve symbol.

See also:


const QwtText & QwtTextLabel::text () const [inherited]

Return the text.

QRect QwtTextLabel::textRect () const [inherited] Calculate the rect for the text in widget coordinates


Text rect


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Mon Aug 1 2011 Version 5.2.2 Qwt User's Guide