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C++ SymbolLayerItem类代码示例

本文整理汇总了C++中SymbolLayerItem类的典型用法代码示例。如果您正苦于以下问题：C++ SymbolLayerItem类的具体用法？C++ SymbolLayerItem怎么用？C++ SymbolLayerItem使用的例子？那么, 这里精选的类代码示例或许可以为您提供帮助。


在下文中一共展示了SymbolLayerItem类的10个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。

示例1: currentLayer

void QgsSymbolV2PropertiesDialog::layerTypeChanged()
{
  QgsSymbolLayerV2* layer = currentLayer();
  if ( layer == NULL ) return;

  QString newLayerType = cboLayerType->itemData( cboLayerType->currentIndex() ).toString();
  if ( layer->layerType() == newLayerType )
    return;

  // get creation function for new layer from registry
  QgsSymbolLayerV2Registry* pReg = QgsSymbolLayerV2Registry::instance();
  QgsSymbolLayerV2AbstractMetadata* am = pReg->symbolLayerMetadata( newLayerType );
  if ( am == NULL ) // check whether the metadata is assigned
    return;

  // change layer to a new (with different type)
  QgsSymbolLayerV2* newLayer = am->createSymbolLayer( QgsStringMap() );
  if ( newLayer == NULL )
    return;
  mSymbol->changeSymbolLayer( currentLayerIndex(), newLayer );

  updateSymbolLayerWidget( newLayer );

  // update symbol layer item
  SymbolLayerItem* item = currentLayerItem();
  item->setLayer( newLayer );
  item->updatePreview();

  updatePreview();
}
开发者ID:mmubangizi，项目名称:qgis，代码行数:30，代码来源:qgssymbolv2propertiesdialog.cpp

示例2: 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 );
}
开发者ID:dbaston，项目名称:QGIS，代码行数:26，代码来源:qgssymbolselectordialog.cpp

示例3: currentLayerItem

void QgsSymbolSelectorWidget::updateLayerPreview()
{
  // get current layer item and update its icon
  SymbolLayerItem *item = currentLayerItem();
  if ( item )
    item->updatePreview();
  // update also preview of the whole symbol
  updatePreview();
}
开发者ID:dbaston，项目名称:QGIS，代码行数:9，代码来源:qgssymbolselectordialog.cpp

示例4: currentLayerItem

void QgsSymbolV2PropertiesDialog::updateLayerPreview()
{
  // get current layer item and update its icon
  SymbolLayerItem* item = currentLayerItem();
  if ( item )
    item->updatePreview();

  // update also preview of the whole symbol
  updatePreview();
}
开发者ID:mmubangizi，项目名称:qgis，代码行数:10，代码来源:qgssymbolv2propertiesdialog.cpp

示例5: disconnect

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 );
}
开发者ID:dbaston，项目名称:QGIS，代码行数:28，代码来源:qgssymbolselectordialog.cpp

示例6: 

QgsSymbolLayer *QgsSymbolSelectorWidget::currentLayer()
{
  QModelIndex idx = layersTree->currentIndex();
  if ( !idx.isValid() )
    return nullptr;

  SymbolLayerItem *item = static_cast<SymbolLayerItem *>( model->itemFromIndex( idx ) );
  if ( item->isLayer() )
    return item->layer();

  return nullptr;
}
开发者ID:dbaston，项目名称:QGIS，代码行数:12，代码来源:qgssymbolselectordialog.cpp

示例7: 

QgsSymbolLayerV2* QgsSymbolV2SelectorDialog::currentLayer()
{
  QModelIndex idx = layersTree->currentIndex();
  if ( !idx.isValid() )
    return NULL;

  SymbolLayerItem *item = static_cast<SymbolLayerItem*>( model->itemFromIndex( idx ) );
  if ( item->isLayer() )
    return item->layer();

  return NULL;
}
开发者ID:stevenmizuno，项目名称:QGIS，代码行数:12，代码来源:qgssymbolv2selectordialog.cpp

示例8: ddSize

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();
}
开发者ID:dbaston，项目名称:QGIS，代码行数:49，代码来源:qgssymbolselectordialog.cpp

示例9: SymbolLayerItem

void QgsSymbolSelectorWidget::loadSymbol( QgsSymbol *symbol, SymbolLayerItem *parent )
{
  SymbolLayerItem *symbolItem = new SymbolLayerItem( symbol );
  QFont boldFont = symbolItem->font();
  boldFont.setBold( true );
  symbolItem->setFont( boldFont );
  parent->appendRow( symbolItem );

  int count = symbol->symbolLayerCount();
  for ( int i = count - 1; i >= 0; i-- )
  {
    SymbolLayerItem *layerItem = new SymbolLayerItem( symbol->symbolLayer( i ) );
    layerItem->setEditable( false );
    symbolItem->appendRow( layerItem );
    if ( symbol->symbolLayer( i )->subSymbol() )
    {
      loadSymbol( symbol->symbolLayer( i )->subSymbol(), layerItem );
    }
    layersTree->setExpanded( layerItem->index(), true );
  }
  layersTree->setExpanded( symbolItem->index(), true );
}
开发者ID:dbaston，项目名称:QGIS，代码行数:22，代码来源:qgssymbolselectordialog.cpp

示例10: updateUi

void QgsSymbolV2SelectorDialog::layerChanged()
{
  updateUi();

  SymbolLayerItem *currentItem = static_cast<SymbolLayerItem*>( model->itemFromIndex( layersTree->currentIndex() ) );
  if ( currentItem == NULL )
    return;

  if ( currentItem->isLayer() )
  {
    SymbolLayerItem *parent = static_cast<SymbolLayerItem*>( currentItem->parent() );
    mDataDefineRestorer.reset( new DataDefinedRestorer( parent->symbol(), currentItem->layer() ) );
    QgsLayerPropertiesWidget *layerProp = new QgsLayerPropertiesWidget( currentItem->layer(), parent->symbol(), mVectorLayer );
    layerProp->setExpressionContext( mPresetExpressionContext.data() );
    layerProp->setMapCanvas( mMapCanvas );
    setWidget( layerProp );
    connect( layerProp, SIGNAL( changed() ), mDataDefineRestorer.data(), SLOT( restore() ) );
    connect( layerProp, SIGNAL( changed() ), this, SLOT( updateLayerPreview() ) );
    // This connection when layer type is changed
    connect( layerProp, SIGNAL( changeLayer( QgsSymbolLayerV2* ) ), this, SLOT( changeLayer( QgsSymbolLayerV2* ) ) );
  }
开发者ID:stevenmizuno，项目名称:QGIS，代码行数:21，代码来源:qgssymbolv2selectordialog.cpp


注：本文中的SymbolLayerItem类示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。