Fix regression - lost "load from raster band" button in raster GUI

Author: wonder-sk

src/gui/raster/qgscolorrampshaderwidget.cpp

@@ -97,12 +97,12 @@ void QgsColorRampShaderWidget::initializeForUseWithRasterLayer()
 {
   Q_ASSERT( mClassificationModeComboBox->findData( QgsColorRampShader::Quantile < 0 ) );
   mClassificationModeComboBox->addItem( tr( "Quantile" ), QgsColorRampShader::Quantile );
-  mLoadFromBandButton->setVisible( bool( mRasterDataProvider ) ); // only for raster version
 }
 
 void QgsColorRampShaderWidget::setRasterDataProvider( QgsRasterDataProvider *dp )
 {
   mRasterDataProvider = dp;
+  mLoadFromBandButton->setVisible( bool( mRasterDataProvider ) ); // only for raster version
 }
 
 void QgsColorRampShaderWidget::setRasterBand( int band )

src/gui/raster/qgssinglebandpseudocolorrendererwidget.cpp

@@ -143,25 +143,14 @@ void QgsSingleBandPseudoColorRendererWidget::setMapCanvas( QgsMapCanvas *canvas
   mColorRampShaderWidget->setExtent( mMinMaxWidget->extent() );
 }
 
-void QgsSingleBandPseudoColorRendererWidget::mLoadFromBandButton_clicked()
-{
-  if ( !mRasterLayer || !mRasterLayer->dataProvider() )
-  {
-    return;
-  }
-
-  int bandIndex = mBandComboBox->currentBand();
-  mColorRampShaderWidget->setRasterBand( bandIndex );
-  emit widgetChanged();
-}
-
 void QgsSingleBandPseudoColorRendererWidget::setFromRenderer( const QgsRasterRenderer *r )
 {
   const QgsSingleBandPseudoColorRenderer *pr = dynamic_cast<const QgsSingleBandPseudoColorRenderer *>( r );
   if ( pr )
   {
     mBandComboBox->setBand( pr->band() );
     mMinMaxWidget->setBands( QList< int >() << pr->band() );
+    mColorRampShaderWidget->setRasterBand( pr->band() );
 
     const QgsRasterShader *rasterShader = pr->shader();
     if ( rasterShader )

src/gui/raster/qgssinglebandpseudocolorrendererwidget.h

@@ -66,7 +66,6 @@ class GUI_EXPORT QgsSingleBandPseudoColorRendererWidget: public QgsRasterRendere
     void loadMinMaxFromTree( double min, double max );
 
   private slots:
-    void mLoadFromBandButton_clicked();
     void bandChanged();
     void mMinLineEdit_textChanged( const QString & );
     void mMaxLineEdit_textChanged( const QString & );