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::moveLayerByOffset( int offset )
{
SymbolLayerItem *item = currentLayerItem();
if ( !item )
return;
int row = item->row();
SymbolLayerItem *parent = static_cast<SymbolLayerItem *>( item->parent() );
QgsSymbol *parentSymbol = parent->symbol();
int layerIdx = parent->rowCount() - row - 1;
// switch layers
QgsSymbolLayer *tmpLayer = parentSymbol->takeSymbolLayer( layerIdx );
parentSymbol->insertSymbolLayer( layerIdx - offset, tmpLayer );
QList<QStandardItem *> rowItems = parent->takeRow( row );
parent->insertRows( row + offset, rowItems );
parent->updatePreview();
QModelIndex newIdx = rowItems[ 0 ]->index();
layersTree->setCurrentIndex( newIdx );
updatePreview();
updateUi();
}
void QgsSymbolSelectorWidget::updateUi()
{
QModelIndex currentIdx = layersTree->currentIndex();
if ( !currentIdx.isValid() )
return;
SymbolLayerItem *item = static_cast<SymbolLayerItem *>( model->itemFromIndex( currentIdx ) );
if ( !item->isLayer() )
{
btnUp->setEnabled( false );
btnDown->setEnabled( false );
btnRemoveLayer->setEnabled( false );
btnLock->setEnabled( false );
btnDuplicate->setEnabled( false );
return;
}
int rowCount = item->parent()->rowCount();
int currentRow = item->row();
btnUp->setEnabled( currentRow > 0 );
btnDown->setEnabled( currentRow < rowCount - 1 );
btnRemoveLayer->setEnabled( rowCount > 1 );
btnLock->setEnabled( true );
btnDuplicate->setEnabled( true );
}
void QgsSymbolSelectorWidget::addLayer()
{
QModelIndex idx = layersTree->currentIndex();
if ( !idx.isValid() )
return;
int insertIdx = -1;
SymbolLayerItem *item = static_cast<SymbolLayerItem *>( model->itemFromIndex( idx ) );
if ( item->isLayer() )
{
insertIdx = item->row();
item = static_cast<SymbolLayerItem *>( item->parent() );
}
QgsSymbol *parentSymbol = item->symbol();
// save data-defined values at marker level
QgsProperty ddSize( parentSymbol->type() == QgsSymbol::Marker
? static_cast<QgsMarkerSymbol *>( parentSymbol )->dataDefinedSize()
: QgsProperty() );
QgsProperty ddAngle( parentSymbol->type() == QgsSymbol::Marker
? static_cast<QgsMarkerSymbol *>( parentSymbol )->dataDefinedAngle()
: QgsProperty() );
QgsProperty ddWidth( parentSymbol->type() == QgsSymbol::Line
? static_cast<QgsLineSymbol *>( parentSymbol )->dataDefinedWidth()
: QgsProperty() );
QgsSymbolLayer *newLayer = QgsApplication::symbolLayerRegistry()->defaultSymbolLayer( parentSymbol->type() );
if ( insertIdx == -1 )
parentSymbol->appendSymbolLayer( newLayer );
else
parentSymbol->insertSymbolLayer( item->rowCount() - insertIdx, newLayer );
// restore data-defined values at marker level
if ( ddSize )
static_cast<QgsMarkerSymbol *>( parentSymbol )->setDataDefinedSize( ddSize );
if ( ddAngle )
static_cast<QgsMarkerSymbol *>( parentSymbol )->setDataDefinedAngle( ddAngle );
if ( ddWidth )
static_cast<QgsLineSymbol *>( parentSymbol )->setDataDefinedWidth( ddWidth );
SymbolLayerItem *newLayerItem = new SymbolLayerItem( newLayer );
item->insertRow( insertIdx == -1 ? 0 : insertIdx, newLayerItem );
item->updatePreview();
layersTree->setCurrentIndex( model->indexFromItem( newLayerItem ) );
updateUi();
updatePreview();
}
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;
}
void QgsSymbolSelectorWidget::duplicateLayer()
{
QModelIndex idx = layersTree->currentIndex();
if ( !idx.isValid() )
return;
SymbolLayerItem *item = static_cast<SymbolLayerItem *>( model->itemFromIndex( idx ) );
if ( !item->isLayer() )
return;
QgsSymbolLayer *source = item->layer();
int insertIdx = item->row();
item = static_cast<SymbolLayerItem *>( item->parent() );
QgsSymbol *parentSymbol = item->symbol();
QgsSymbolLayer *newLayer = source->clone();
if ( insertIdx == -1 )
parentSymbol->appendSymbolLayer( newLayer );
else
parentSymbol->insertSymbolLayer( item->rowCount() - insertIdx, newLayer );
SymbolLayerItem *newLayerItem = new SymbolLayerItem( newLayer );
item->insertRow( insertIdx == -1 ? 0 : insertIdx, newLayerItem );
if ( newLayer->subSymbol() )
{
loadSymbol( newLayer->subSymbol(), newLayerItem );
layersTree->setExpanded( newLayerItem->index(), true );
}
item->updatePreview();
layersTree->setCurrentIndex( model->indexFromItem( newLayerItem ) );
updateUi();
updatePreview();
}
