File indexing completed on 2024-05-12 04:20:36

 /*
  * SPDX-FileCopyrightText: 2001-2015 Klaralvdalens Datakonsult AB. All rights reserved.
  *
  * This file is part of the KD Chart library.
  *
  * SPDX-License-Identifier: GPL-2.0-or-later
  */
 
 #ifndef __KCHART_PALETTE_H__
 #define __KCHART_PALETTE_H__
 
 #include <QObject>
 #include <QBrush>
 #include "KChartGlobal.h"
 
 namespace KChart {
 
   /**
    * \brief A Palette is a set of brushes (or colors) to be used
    * for painting data sets.
    *
    * The palette class encapsulates a collection of brushes, which in
    * the simplest case are colors, to be used for painting a series of
    * data sets. When asked for the m-th color, a palette of size n will
    * wrap around and thus cycle through the available colors.
    *
    * Three builtin palettes are provided for convenience, one with a default
    * set of colors, one with a subdued color selection, one with rainbow
    * colors.
    *
    * When a palette changes, it emits a changed() signal. Hook up to it, if
    * you want to repaint when the color selection changes.
    */
 
 class KCHART_EXPORT Palette: public QObject
 {
     Q_OBJECT
 public:
     explicit Palette( QObject *parent  = nullptr );
     Palette( const Palette& );
     Palette &operator= ( const Palette & );
 
     ~Palette() override;
 
     /** Provide access to the three builtin palettes, one with standard bright
      * colors, one with more subdued colors, and one with rainbow colors.  */
     static const Palette& defaultPalette();
     static const Palette& subduedPalette();
     static const Palette& rainbowPalette();
 
     /** @return whether this represents a valid palette. For a palette to be
      * valid it needs to have at least one brush associated. */
     bool isValid() const;
 
     /** @return the number of brushed in the palette.  */
     int size() const;
 
     /** Adds \a brush to the palette. If no \a position is specified, the
      * brush is appended.
      */
     void addBrush( const QBrush & brush, int position = -1 );
 
     /**
      * Query the palette for a brush at the specified position. If the
      * position exceeds the size of the palette, it wraps around.
      */
     QBrush getBrush( int position ) const;
 
     /** Remove the brush at position \a position, if there is one.  */
     void removeBrush( int position );
 
 Q_SIGNALS:
     /**  Emitted whenever the palette changes. Views listen to this and repaints. */
     void changed();
 
 private:
     KCHART_DECLARE_PRIVATE_BASE_VALUE( Palette )
 };
 
 }
 
 KCHART_DECLARE_SWAP_SPECIALISATION( KChart::Palette )
 
 #endif