SYNOPSIS
#include <qwt_legend_data.h>
Public Types
enum Mode { ReadOnly, Clickable, Checkable }
Mode defining how a legend entry interacts.
enum Role { ModeRole, TitleRole, IconRole, UserRole = 32 }
Identifier how to interprete a QVariant.
Public Member Functions
QwtLegendData ()
Constructor.
~QwtLegendData ()
Destructor.
void setValues (const QMap< int, QVariant > &)
const QMap< int, QVariant > & values () const
void setValue (int role, const QVariant &)
QVariant value (int role) const
bool hasRole (int role) const
bool isValid () const
QwtGraphic icon () const
QwtText title () const
Mode mode () const
Detailed Description
Attributes of an entry on a legend.
QwtLegendData is an abstract container ( like QAbstractModel ) to exchange attributes, that are only known between to the plot item and the legend.
By overloading QwtPlotItem::legendData() any other set of attributes could be used, that can be handled by a modified ( or completely different ) implementation of a legend.
See Also:
- QwtLegend, QwtPlotLegendItem
Note:
- The stockchart example implements a legend as a tree with checkable items
Member Enumeration Documentation
enum QwtLegendData::Mode
Mode defining how a legend entry interacts.
Enumerator
- ReadOnly
- The legend item is not interactive, like a label.
- Clickable
- The legend item is clickable, like a push button.
- Checkable
- The legend item is checkable, like a checkable button.
Member Function Documentation
bool QwtLegendData::hasRole (introle) const
Parameters:
- role Attribute role
Returns:
- True, when the internal map has an entry for role
QwtGraphic QwtLegendData::icon () const
Returns:
- Value of the IconRole attribute
bool QwtLegendData::isValid () const
Returns:
- True, when the internal map is empty
QwtLegendData::Mode QwtLegendData::mode () const
Returns:
- Value of the ModeRole attribute
void QwtLegendData::setValue (introle, const QVariant &data)
Set an attribute valueParameters:
-
role Attribute role
data Attribute value
See Also:
- value()
void QwtLegendData::setValues (const QMap< int, QVariant > &map)
Set the legend attributesQwtLegendData actually is a QMap<int, QVariant> with some convenience interfaces
Parameters:
- map Values
See Also:
- values()
QwtText QwtLegendData::title () const
Returns:
- Value of the TitleRole attribute
QVariant QwtLegendData::value (introle) const
Parameters:
- role Attribute role
Returns:
- Attribute value for a specific role
const QMap< int, QVariant > & QwtLegendData::values () const
Returns:
- Legend attributes
See Also:
- setValues()
Author
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