Referencia de la Clase QwtLegend

The legend widget. Más...

#include <qwt_legend.h>

Diagrama de herencias de QwtLegend

Lista de todos los miembros.

Clases
class	PrivateData
Tipos públicos
enum	LegendDisplayPolicy { NoIdentifier = 0, FixedIdentifier = 1, AutoIdentifier = 2 }
	Display policy. Más...
enum	LegendItemMode { ReadOnlyItem, ClickableItem, CheckableItem }
	Interaction mode for the legend items. Más...
Métodos públicos
	QwtLegend (QWidget *parent=NULL)
virtual	~QwtLegend ()
	Destructor.
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 QValueList< QWidget * >	legendItems () const
void	clear ()
	Remove all items.
bool	isEmpty () const
	Return true, if there are no legend items.
uint	itemCount () const
	Return the number of legend items.
virtual bool	eventFilter (QObject *, QEvent *)
virtual QSize	sizeHint () const
	Return a size hint.
virtual int	heightForWidth (int w) const
QScrollBar *	horizontalScrollBar () const
QScrollBar *	verticalScrollBar () const
Métodos protegidos
virtual void	resizeEvent (QResizeEvent *)
virtual void	layoutContents ()

---

Descripción detallada

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.

Ver también:

QwtLegendItem, QwtLegendItemManager QwtPlot

---

Documentación de las enumeraciones miembro de la clase

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.

Ver también:

setDisplayPolicy(), displayPolicy(), QwtLegendItem::IdentifierMode

Valores de enumeraciones:

NoIdentifier
FixedIdentifier
AutoIdentifier

enum QwtLegend::LegendItemMode

Interaction mode for the legend items.

Valores de enumeraciones:

ReadOnlyItem
ClickableItem
CheckableItem

---

Documentación del constructor y destructor

QwtLegend::QwtLegend

(

QWidget *

parent = NULL

)

[explicit]

Parámetros:

parent

Parent widget

QwtLegend::~QwtLegend

(

)

[virtual]

Destructor.

---

Documentación de las funciones miembro

void QwtLegend::clear

(

void

)

Remove all items.

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.

QwtLegend::LegendDisplayPolicy QwtLegend::displayPolicy

(

)

const

Devuelve:

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

Ver también:

setDisplayPolicy, LegendDisplayPolicy

bool QwtLegend::eventFilter	(	QObject *	,
		QEvent *
	)		[virtual]

Filters events if this object has been installed as an event filter for the watched object.

In your reimplementation of this function, if you want to filter the event e, out, i.e. stop it being handled further, return TRUE; otherwise return FALSE.

Example:

    class MyMainWindow : public QMainWindow
    {
    public:
        MyMainWindow( QWidget *parent = 0, const char *name = 0 );

    protected:
        bool eventFilter( QObject *obj, QEvent *ev );

    private:
        QTextEdit *textEdit;
    };

    MyMainWindow::MyMainWindow( QWidget *parent, const char *name )
        : QMainWindow( parent, name )
    {
        textEdit = new QTextEdit( this );
        setCentralWidget( textEdit );
        textEdit->installEventFilter( this );
    }

    bool MyMainWindow::eventFilter( QObject *obj, QEvent *ev )
    {
        if ( obj == textEdit ) {
            if ( e->type() == QEvent::KeyPress ) {
                QKeyEvent *k = (QKeyEvent*)ev;
                qDebug( "Ate key press %d", k->key() );
                return TRUE;
            } else {
                return FALSE;
            }
        } else {
            // pass the event on to the parent class
            return QMainWindow::eventFilter( obj, ev );
        }
    }

Notice in the example above that unhandled events are passed to the base class's eventFilter() function, since the base class might have reimplemented eventFilter() for its own internal purposes.

Atención:

If you delete the receiver object in this function, be sure to return TRUE. Otherwise, Qt will forward the event to the deleted object and the program might crash.

Ver también:

installEventFilter()

Reimplementado de QObject.

QWidget * QwtLegend::find

(

const QwtLegendItemManager *

plotItem

)

const

Find the widget that represents a plot item

Parámetros:

plotItem

Plot item

Devuelve:

Widget on the legend, or NULL

QwtLegendItemManager * QwtLegend::find

(

const QWidget *

legendItem

)

const

Find the widget that represents a plot item

Parámetros:

plotItem

Plot item

Devuelve:

Widget on the legend, or NULL

int QwtLegend::heightForWidth

(

int

width

)

const [virtual]

Devuelve:

The preferred height, for the width w.

Parámetros:

width

Width

Reimplementado de QWidget.

QScrollBar * QwtLegend::horizontalScrollBar

(

)

const

int QwtLegend::identifierMode

(

)

const

Devuelve:

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

Default is ShowLine | ShowSymbol | ShowText.

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

Insert a new item for a plot item

Parámetros:

plotItem	Plot item
legendItem	New legend item

Nota:

The parent of item will be changed to QwtLegend::contentsWidget()

bool QwtLegend::isEmpty

(

void

)

const

Return true, if there are no legend items.

uint QwtLegend::itemCount

(

)

const

Return the number of legend items.

QwtLegend::LegendItemMode QwtLegend::itemMode

(

)

const

void QwtLegend::layoutContents

(

)

[protected, virtual]

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

QValueList< QWidget * > QwtLegend::legendItems

(

)

const [virtual]

void QwtLegend::remove

(

const QwtLegendItemManager *

plotItem

)

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

Parámetros:

plotItem

Plot item

void QwtLegend::resizeEvent

(

QResizeEvent *

e

)

[protected, virtual]

Resize event

Parámetros:

e

Event

Reimplementado de QFrame.

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

Set the legend display policy to:

Parámetros:

policy	Legend display policy
mode	Identifier mode (or'd ShowLine, ShowSymbol, ShowText)

Ver también:

displayPolicy, LegendDisplayPolicy

void QwtLegend::setItemMode

(

LegendItemMode

mode

)

QSize QwtLegend::sizeHint

(

)

const [virtual]

Return a size hint.

Reimplementado de QFrame.

QScrollBar * QwtLegend::verticalScrollBar

(

)

const

---

La documentación para esta clase fue generada a partir de los siguientes ficheros:

• src/qwt/src/qwt_legend.h
• src/qwt/src/qwt_legend.cpp