qgsrasterrendererwidget.h

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/***************************************************************************
                         qgsrasterrendererwidget.h
                         ---------------------------
    begin                : February 2012
    copyright            : (C) 2012 by Marco Hugentobler
    email                : marco at sourcepole dot ch
 ***************************************************************************/
 
/***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/
 
#ifndef QGSRASTERRENDERERWIDGET_H
#define QGSRASTERRENDERERWIDGET_H
 
#include "qgsrectangle.h"
#include "qgscontrastenhancement.h"
#include "qgis.h"
 
#include <QWidget>
#include "qgis_gui.h"
 
class QgsRasterLayer;
class QgsRasterRenderer;
class QgsMapCanvas;
class QgsRasterMinMaxWidget;
 
class GUI_EXPORT QgsRasterRendererWidget : public QWidget
{
    Q_OBJECT
 
  public:
    //TODO QGIS 4.0 - remove extent parameter, replace with map canvas parameter
    QgsRasterRendererWidget( QgsRasterLayer *layer, const QgsRectangle &extent )
      : mRasterLayer( layer )
      , mExtent( extent )
    {}
 
    virtual QgsRasterRenderer *renderer() = 0 SIP_FACTORY;
 
    void setRasterLayer( QgsRasterLayer *layer ) { mRasterLayer = layer; }
 
    const QgsRasterLayer *rasterLayer() const { return mRasterLayer; }
 
    virtual void setMapCanvas( QgsMapCanvas *canvas );
 
    QgsMapCanvas *mapCanvas();
 
    virtual QString min( int index = 0 )
    {
      Q_UNUSED( index )
      return QString();
    }
    virtual QString max( int index = 0 )
    {
      Q_UNUSED( index )
      return QString();
    }
    virtual void setMin( const QString &value, int index = 0 )
    {
      Q_UNUSED( index )
      Q_UNUSED( value );
    }
    virtual void setMax( const QString &value, int index = 0 )
    {
      Q_UNUSED( index )
      Q_UNUSED( value );
    }
    virtual QString stdDev() { return QString(); }
    virtual void setStdDev( const QString &value ) { Q_UNUSED( value ) }
    virtual int selectedBand( int index = 0 )
    {
      Q_UNUSED( index )
      return -1;
    }
 
    virtual void doComputations() {}
 
    virtual QgsRasterMinMaxWidget *minMaxWidget() { return nullptr; }
 
    virtual QgsContrastEnhancement::ContrastEnhancementAlgorithm contrastEnhancementAlgorithm() const { return QgsContrastEnhancement::NoEnhancement; }
 
    virtual void setContrastEnhancementAlgorithm( QgsContrastEnhancement::ContrastEnhancementAlgorithm algorithm )
    {
      Q_UNUSED( algorithm )
      return;
    }
 
  signals:
 
    void widgetChanged();
 
  protected:
    QgsRasterLayer *mRasterLayer = nullptr;
 
    QgsRectangle mExtent;
 
    QgsMapCanvas *mCanvas = nullptr;
};
 
#endif // QGSRASTERRENDERERWIDGET_H