void QgsSymbolSelectorWidget::changeLayer( QgsSymbolLayer *newLayer )
{
SymbolLayerItem *item = currentLayerItem();
QgsSymbolLayer *layer = item->layer();
if ( layer->subSymbol() )
{
item->removeRow( 0 );
}
// update symbol layer item
item->setLayer( newLayer );
// When it is a marker symbol
if ( newLayer->subSymbol() )
{
loadSymbol( newLayer->subSymbol(), item );
layersTree->setExpanded( item->index(), true );
}
// Change the symbol at last to avoid deleting item's layer
QgsSymbol *symbol = static_cast<SymbolLayerItem *>( item->parent() )->symbol();
int layerIdx = item->parent()->rowCount() - item->row() - 1;
symbol->changeSymbolLayer( layerIdx, newLayer );
item->updatePreview();
updatePreview();
// Important: This lets the layer have its own layer properties widget
layerChanged();
}
void QgsSymbolSelectorWidget::symbolChanged()
{
SymbolLayerItem *currentItem = static_cast<SymbolLayerItem *>( model->itemFromIndex( layersTree->currentIndex() ) );
if ( !currentItem || currentItem->isLayer() )
return;
// disconnect to avoid recreating widget
disconnect( layersTree->selectionModel(), &QItemSelectionModel::currentChanged, this, &QgsSymbolSelectorWidget::layerChanged );
if ( currentItem->parent() )
{
// it is a sub-symbol
QgsSymbol *symbol = currentItem->symbol();
SymbolLayerItem *parent = static_cast<SymbolLayerItem *>( currentItem->parent() );
parent->removeRow( 0 );
loadSymbol( symbol, parent );
layersTree->setCurrentIndex( parent->child( 0 )->index() );
parent->updatePreview();
}
else
{
//it is the symbol itself
loadSymbol();
QModelIndex newIndex = layersTree->model()->index( 0, 0 );
layersTree->setCurrentIndex( newIndex );
}
updatePreview();
// connect it back once things are set
connect( layersTree->selectionModel(), &QItemSelectionModel::currentChanged, this, &QgsSymbolSelectorWidget::layerChanged );
}
void QgsSymbolSelectorWidget::removeLayer()
{
SymbolLayerItem *item = currentLayerItem();
int row = item->row();
SymbolLayerItem *parent = static_cast<SymbolLayerItem *>( item->parent() );
int layerIdx = parent->rowCount() - row - 1; // IMPORTANT
QgsSymbol *parentSymbol = parent->symbol();
QgsSymbolLayer *tmpLayer = parentSymbol->takeSymbolLayer( layerIdx );
parent->removeRow( row );
parent->updatePreview();
QModelIndex newIdx = parent->child( 0 )->index();
layersTree->setCurrentIndex( newIdx );
updateUi();
updatePreview();
//finally delete the removed layer pointer
delete tmpLayer;
}