QwtLegend(3) Qwt User's Guide QwtLegend(3)NAMEQwtLegend-
SYNOPSIS
#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 *)
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
Member Enumeration Documentation
enum QwtLegend::LegendDisplayPolicy
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 QwtLegend::LegendItemMode
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()Constructor & Destructor Documentation
QwtLegend::QwtLegend (QWidget *parent = NULL) [explicit]
Constructor
Parameters:
parent Parent widget
Member Function Documentation
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
Returns:
the legend display policy. Default is LegendDisplayPolicy::Auto.
See also:
setDisplayPolicy(), LegendDisplayPolicy
bool QwtLegend::eventFilter (QObject *o, QEvent *e) [virtual]
Filter layout related events of QwtLegend::contentsWidget().
Parameters:
o Object to be filtered
e Event
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
QwtLegendItemManager * 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 [virtual]
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 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()
QwtLegend::LegendItemMode QwtLegend::itemMode () const
See also:
LegendItemMode
void QwtLegend::layoutContents () [protected], [virtual]
Adjust contents widget and item layout to the size of the viewport().
void QwtLegend::remove (const QwtLegendItemManager *plotItem)
Find the corresponding item for a plotItem and remove it from the item
list.
Parameters:
plotItem Plot item
void QwtLegend::resizeEvent (QResizeEvent *e) [protected], [virtual]
Resize event
Parameters:
e Resize event
void QwtLegend::setDisplayPolicy (LegendDisplayPolicypolicy, 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 (LegendItemModemode)
See also:
LegendItemMode
QScrollBar * QwtLegend::verticalScrollBar () const
Returns:
Vertical scrollbar
See also:
horizontalScrollBar()Author
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Version 5.2.3 Tue Nov 20 2012 QwtLegend(3)
