qgsrastersinglecolorrendererwidget.cpp

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/***************************************************************************
                         qgsrastersinglecolorrendererwidget.cpp
                         ---------------------------------
    begin                : April 2024
    copyright            : (C) 2024 by Mathieu Pellerin
    email                : mathieu at opengis 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.                                   *
 *                                                                         *
 ***************************************************************************/
 
#include "qgsrastersinglecolorrendererwidget.h"
#include "qgsrastersinglecolorrenderer.h"
#include "qgsrasterlayer.h"
#include "qgsrasterdataprovider.h"
 
QgsRasterSingleColorRendererWidget::QgsRasterSingleColorRendererWidget( QgsRasterLayer *layer, const QgsRectangle &extent )
  : QgsRasterRendererWidget( layer, extent )
{
  setupUi( this );
 
  if ( mRasterLayer )
  {
    QgsRasterDataProvider *provider = mRasterLayer->dataProvider();
    if ( !provider )
    {
      return;
    }
 
    mBandComboBox->setLayer( layer );
 
    connect( mBandComboBox, &QgsRasterBandComboBox::bandChanged, this, [ = ]( int ) { emit widgetChanged(); } );
    connect( mColorButton, &QgsColorButton::colorChanged, this, [ = ]( const QColor & ) { emit widgetChanged(); } );
 
    setFromRenderer( layer->renderer() );
  }
}
 
QgsRasterRenderer *QgsRasterSingleColorRendererWidget::renderer()
{
  if ( !mRasterLayer )
  {
    return nullptr;
  }
 
  QgsRasterDataProvider *provider = mRasterLayer->dataProvider();
  if ( !provider )
  {
    return nullptr;
  }
 
  QgsRasterSingleColorRenderer *renderer = new QgsRasterSingleColorRenderer( provider, mBandComboBox->currentBand(), mColorButton->color() );
  return renderer;
}
 
void QgsRasterSingleColorRendererWidget::setFromRenderer( const QgsRasterRenderer *r )
{
  const QgsRasterSingleColorRenderer *scr = dynamic_cast<const QgsRasterSingleColorRenderer *>( r );
  if ( scr )
  {
    mBandComboBox->setBand( scr->inputBand() );
    mColorButton->setColor( scr->color() );
  }
  else
  {
    mBandComboBox->setBand( 1 );
    mColorButton->setColor( QColor( 0, 0, 0 ) );
  }
}