C++ QStandardItemModel::indexFromItem方法代码示例

QgsStyleV2GroupSelectionDialog::QgsStyleV2GroupSelectionDialog( QgsStyleV2 *style, QWidget *parent ) :
    QDialog( parent )
    , mStyle( style )
{
  setupUi( this );

  QStandardItemModel* model = new QStandardItemModel( groupTree );
  groupTree->setModel( model );

  QStandardItem *allSymbols = new QStandardItem( tr( "All Symbols" ) );
  allSymbols->setData( "all", Qt::UserRole + 2 );
  allSymbols->setEditable( false );
  setBold( allSymbols );
  model->appendRow( allSymbols );

  QStandardItem *group = new QStandardItem( "" ); //require empty name to get first order groups
  group->setData( "groupsheader", Qt::UserRole + 2 );
  group->setEditable( false );
  group->setFlags( group->flags() & ~Qt::ItemIsSelectable );
  buildGroupTree( group );
  group->setText( tr( "Groups" ) );//set title later
  QStandardItem *ungrouped = new QStandardItem( tr( "Ungrouped" ) );
  ungrouped->setData( 0 );
  ungrouped->setData( "group", Qt::UserRole + 2 );
  setBold( ungrouped );
  setBold( group );
  group->appendRow( ungrouped );
  model->appendRow( group );

  QStandardItem *tag = new QStandardItem( tr( "Smart Groups" ) );
  tag->setData( "smartgroupsheader" , Qt::UserRole + 2 );
  tag->setEditable( false );
  tag->setFlags( group->flags() & ~Qt::ItemIsSelectable );
  setBold( tag );
  QgsSymbolGroupMap sgMap = mStyle->smartgroupsListMap();
  QgsSymbolGroupMap::const_iterator i = sgMap.constBegin();
  while ( i != sgMap.constEnd() )
  {
    QStandardItem *item = new QStandardItem( i.value() );
    item->setEditable( false );
    item->setData( i.key() );
    item->setData( "smartgroup" , Qt::UserRole + 2 );
    tag->appendRow( item );
    ++i;
  }
  model->appendRow( tag );

  // expand things in the group tree
  int rows = model->rowCount( model->indexFromItem( model->invisibleRootItem() ) );
  for ( int i = 0; i < rows; i++ )
  {
    groupTree->setExpanded( model->indexFromItem( model->item( i ) ), true );
  }
  connect( groupTree->selectionModel(), SIGNAL( selectionChanged( const QItemSelection&, const QItemSelection& ) ), this, SLOT( groupTreeSelectionChanged( const QItemSelection&, const QItemSelection& ) ) );
}

void BookmarkWidget::expandItems()
{
    QStandardItemModel *model = bookmarkManager->treeBookmarkModel();
    QList<QStandardItem*>list = model->findItems(QLatin1String("*"),
        Qt::MatchWildcard | Qt::MatchRecursive, 0);
    foreach (const QStandardItem* item, list) {
        const QModelIndex& index = model->indexFromItem(item);
        treeView->setExpanded(filterBookmarkModel->mapFromSource(index),
            item->data(Qt::UserRole + 11).toBool());
    }
}

void QgsComposerLegendWidget::on_mMoveUpToolButton_clicked()
{
  if ( !mLegend )
  {
    return;
  }

  QStandardItemModel* itemModel = qobject_cast<QStandardItemModel *>( mItemTreeView->model() );
  if ( !itemModel )
  {
    return;
  }

  QModelIndex currentIndex = mItemTreeView->currentIndex();
  if ( !currentIndex.isValid() )
  {
    return;
  }

  mLegend->beginCommand( "Moved legend item up" );
  //is there an older sibling?
  int row = currentIndex.row();
  QModelIndex olderSibling = currentIndex.sibling( row - 1, 0 );

  if ( !olderSibling.isValid() )
  {
    return;
  }

  QModelIndex parentIndex = currentIndex.parent();
  QList<QStandardItem*> itemToMove;
  QList<QStandardItem*> olderSiblingItem;

  if ( !parentIndex.isValid() ) //move toplevel item
  {
    itemToMove = itemModel->takeRow( row );
    olderSiblingItem = itemModel->takeRow( row - 1 );
    itemModel->insertRow( row - 1, itemToMove );
    itemModel->insertRow( row, olderSiblingItem );

  }
  else //move classification items
  {
    QStandardItem* parentItem = itemModel->itemFromIndex( parentIndex );
    itemToMove = parentItem->takeRow( row );
    olderSiblingItem = parentItem->takeRow( row - 1 );
    parentItem->insertRow( row - 1, itemToMove );
    parentItem->insertRow( row, olderSiblingItem );
  }

  mItemTreeView->setCurrentIndex( itemModel->indexFromItem( itemToMove.at( 0 ) ) );
  mLegend->update();
  mLegend->endCommand();
}

void GenericLookupDialog::focusResults()
{
    mResult->header()->resizeSections(QHeaderView::ResizeToContents);
    mResult->setFocus(Qt::OtherFocusReason);

    QStandardItemModel * model = qobject_cast<QStandardItemModel*>(mResult->model());
    QStandardItem * firstItem = model->item(0, 0);
    if (firstItem) {
        QModelIndex firstIndex = model->indexFromItem(firstItem);
        mResult->setCurrentIndex(firstIndex);
    }
}

void QgsComposerLegendWidget::on_mMoveDownPushButton_clicked()
{
  QStandardItemModel* itemModel = dynamic_cast<QStandardItemModel*>( mItemTreeView->model() );
  if ( !itemModel )
  {
    return;
  }

  QModelIndex currentIndex = mItemTreeView->currentIndex();
  if ( !currentIndex.isValid() )
  {
    return;
  }

  //is there an older sibling?
  int row = currentIndex.row();
  QModelIndex youngerSibling = currentIndex.sibling( row + 1, 0 );

  if ( !youngerSibling.isValid() )
  {
    return;
  }

  QModelIndex parentIndex = currentIndex.parent();
  QList<QStandardItem*> itemToMove;
  QList<QStandardItem*> youngerSiblingItem;

  if ( !parentIndex.isValid() ) //move toplevel (layer) item
  {
    youngerSiblingItem = itemModel->takeRow( row + 1 );
    itemToMove = itemModel->takeRow( row );
    itemModel->insertRow( row, youngerSiblingItem );
    itemModel->insertRow( row + 1, itemToMove );
  }
  else //move child (classification) item
  {
    QStandardItem* parentItem = itemModel->itemFromIndex( parentIndex );
    youngerSiblingItem = parentItem->takeRow( row + 1 );
    itemToMove = parentItem->takeRow( row );
    parentItem->insertRow( row, youngerSiblingItem );
    parentItem->insertRow( row + 1, itemToMove );
  }

  mItemTreeView->setCurrentIndex( itemModel->indexFromItem( itemToMove.at( 0 ) ) );
  if ( mLegend )
  {
    mLegend->update();
  }
}