22 , mNotSetString( tr(
"Not set" ) )
24 connect(
this,
static_cast<void ( QComboBox::* )(
int )
>( &QComboBox::currentIndexChanged ),
this, [ = ]
26 if ( mLayer && mLayer->isValid() )
28 const int newBand = currentIndex() >= 0 ? currentData().toInt() : -1 ;
29 if ( newBand != mPrevBand )
31 emit bandChanged( currentIndex() >= 0 ? currentData().toInt() : -1 );
37 connect(
this, &QComboBox::currentTextChanged,
this, [ = ](
const QString & value )
39 if ( !mLayer || !mLayer->isValid() )
42 const int band = value.toInt( &ok );
43 if ( ok && band != mPrevBand )
45 emit bandChanged( band );
48 else if ( mShowNotSet && mPrevBand != -1 )
50 emit bandChanged( -1 );
67 if ( !mLayer || !mLayer->dataProvider() || !mLayer->isValid() )
70 const int band = currentText().toInt( &ok );
77 if ( currentIndex() < 0 )
80 return currentData().toInt();
95 addItem( mNotSetString, -1 );
100 if ( provider && mLayer->isValid() )
102 setEditable(
false );
105 for (
int i = 1; i <= nBands; ++i )
123 setCurrentIndex( 0 );
125 blockSignals(
false );
134 if ( !mLayer || !mLayer->dataProvider() || !mLayer->isValid() )
138 setCurrentIndex( -1 );
139 if ( mPrevBand != -1 )
143 setCurrentText( QString::number(
band ) );
147 setCurrentIndex( findData(
band ) );
160 mNotSetString =
string.isEmpty() ? tr(
"Not set" ) : string;
Base class for all map layer types.
QgsRasterLayer * layer() const
Returns the layer currently associated with the combobox.
void bandChanged(int band)
Emitted when the currently selected band changes.
void setShowNotSetOption(bool show, const QString &string=QString())
Sets whether the combo box should show the "not set" option.
int currentBand() const
Returns the current band number selected in the combobox, or -1 if no band is selected.
QgsRasterBandComboBox(QWidget *parent=nullptr)
Constructor for QgsRasterBandComboBox.
void setLayer(QgsMapLayer *layer)
Sets the raster layer for which the bands are listed in the combobox.
static QString displayBandName(QgsRasterDataProvider *provider, int band)
Returns a user-friendly band name for the specified band.
bool isShowingNotSetOption() const
Returns true if the combo box is showing the "not set" option.
void setBand(int band)
Sets the current band number selected in the combobox.
Base class for raster data providers.
virtual int bandCount() const =0
Gets number of bands.
QString displayBandName(int bandNumber) const
Generates a friendly, descriptive name for the specified bandNumber.
Represents a raster layer.