QgsCustomLayerOrderWidget::QgsCustomLayerOrderWidget( QgsLayerTreeMapCanvasBridge* bridge, QWidget* parent )
: QWidget( parent )
, mBridge( bridge )
{
mModel = new CustomLayerOrderModel( bridge, this );
mView = new QListView( this );
mView->setDragEnabled( true );
mView->setAcceptDrops( true );
mView->setDropIndicatorShown( true );
mView->setSelectionMode( QAbstractItemView::ExtendedSelection );
mView->setDefaultDropAction( Qt::MoveAction );
mView->setModel( mModel );
mChkOverride = new QCheckBox( tr( "Control rendering order" ) );
bridgeHasCustomLayerOrderChanged( bridge->hasCustomLayerOrder() );
connect( mChkOverride, SIGNAL( toggled( bool ) ), bridge, SLOT( setHasCustomLayerOrder( bool ) ) );
connect( bridge, SIGNAL( hasCustomLayerOrderChanged( bool ) ), this, SLOT( bridgeHasCustomLayerOrderChanged( bool ) ) );
connect( bridge, SIGNAL( customLayerOrderChanged( QStringList ) ), this, SLOT( bridgeCustomLayerOrderChanged( QStringList ) ) );
connect( mModel, SIGNAL( rowsInserted( QModelIndex, int, int ) ), this, SLOT( modelUpdated() ) );
connect( mModel, SIGNAL( rowsRemoved( QModelIndex, int, int ) ), this, SLOT( modelUpdated() ) );
connect( bridge->rootGroup(), SIGNAL( visibilityChanged( QgsLayerTreeNode*, Qt::CheckState ) ), this, SLOT( nodeVisibilityChanged( QgsLayerTreeNode*, Qt::CheckState ) ) );
QVBoxLayout* l = new QVBoxLayout;
l->setMargin( 0 );
l->addWidget( mView );
l->addWidget( mChkOverride );
setLayout( l );
}
void QgsLayerTree::setCustomLayerOrder( const QList<QgsMapLayer *> &customLayerOrder )
{
QgsWeakMapLayerPointerList newOrder = _qgis_listRawToQPointer( customLayerOrder );
if ( newOrder == mCustomLayerOrder )
return;
mCustomLayerOrder = newOrder;
emit customLayerOrderChanged();
if ( mHasCustomLayerOrder )
emit layerOrderChanged();
}
void QgsLayerTreeMapCanvasBridge::setCustomLayerOrder( const QStringList& order )
{
if ( mCustomLayerOrder == order )
return;
// verify that the new order is correct
QStringList defOrder( defaultLayerOrder() );
QStringList newOrder( order );
QStringList sortedNewOrder( order );
qSort( defOrder );
qSort( sortedNewOrder );
if ( defOrder.size() < sortedNewOrder.size() )
{
// might contain bad layers, but also duplicates
QSet<QString> ids( defOrder.toSet() );
for ( int i = 0; i < sortedNewOrder.size(); i++ )
{
if ( !ids.contains( sortedNewOrder[i] ) )
{
newOrder.removeAll( sortedNewOrder[i] );
sortedNewOrder.removeAt( i-- );
}
}
}
if ( defOrder != sortedNewOrder )
return; // must be permutation of the default order
mCustomLayerOrder = newOrder;
emit customLayerOrderChanged( mCustomLayerOrder );
if ( mHasCustomLayerOrder )
deferredSetCanvasLayers();
}
