C++ QTableView::sortByColumn方法代码示例

    // Table factory
    QTableView* MakeTableView(QAbstractItemModel* model, bool sortingEnabled = true, uint32_t modelSortColumn = 0)
    {
        class MyTable : public QTableView
        {
        public:
            QStyleOptionViewItem viewOptions() const override
            {
                QStyleOptionViewItem option = QTableView::viewOptions();
                option.decorationAlignment = Qt::AlignHCenter | Qt::AlignCenter;
                option.decorationPosition = QStyleOptionViewItem::Top;
                return option;
            }

            void mouseMoveEvent(QMouseEvent* event) override
            {
                QModelIndex index = indexAt(event->pos());
                if (index.isValid()) {
                    QVariant data = model()->data(index, PlayerTableModel::CursorRole);
                    Qt::CursorShape shape = Qt::ArrowCursor;
                    if (!data.isNull()) {
                        shape = Qt::CursorShape(data.toInt());
                    }
                    setCursor(shape);
                }

                QTableView::mouseMoveEvent(event);
            }
        };

        QTableView* tableView = new MyTable();
        tableView->setModel(model);
        tableView->setSortingEnabled(sortingEnabled);
        if (sortingEnabled) {
            tableView->sortByColumn(FindColumn(model, modelSortColumn));
        }
        tableView->verticalHeader()->hide();
        tableView->setAlternatingRowColors(true);
        tableView->verticalHeader()->setDefaultSectionSize(15);
        tableView->resizeColumnsToContents();
        tableView->horizontalHeader()->setStretchLastSection(true);
        tableView->setSelectionBehavior(QAbstractItemView::SelectRows);
        tableView->setSelectionMode(QAbstractItemView::SingleSelection);
        tableView->setFocusPolicy(Qt::StrongFocus);

        // enable mouse tracking
        tableView->setMouseTracking(true);
        tableView->viewport()->setMouseTracking(true);
        tableView->installEventFilter(this);
        tableView->viewport()->installEventFilter(this);

        return tableView;
    }

void LoungeWidget::setupUI()
{
    QVBoxLayout *mainLayout = new QVBoxLayout();
    
    QTableView *connected = new QTableView();
    
    mainLayout->addWidget(connected);
    
    connected->setModel(m_connectedPlayerList);
    connected->setSortingEnabled(true);
    connected->resizeColumnsToContents();
    connected->horizontalHeader()->setStretchLastSection(true);
    connected->sortByColumn(0, Qt::AscendingOrder);
    
    connect(connected, SIGNAL(activated(QModelIndex)), this, SLOT(processActivatedRow(QModelIndex)));
    
    setLayout(mainLayout);
}

QmitkModulesDialog::QmitkModulesDialog(QWidget *parent, Qt::WindowFlags f) :
    QDialog(parent, f)
{
  this->setWindowTitle("MITK Modules");

  QVBoxLayout* layout = new QVBoxLayout();
  this->setLayout(layout);

  QTableView* tableView = new QTableView(this);
  QmitkModuleTableModel* tableModel = new QmitkModuleTableModel(tableView);
  QSortFilterProxyModel* sortProxyModel = new QSortFilterProxyModel(tableView);
  sortProxyModel->setSourceModel(tableModel);
  sortProxyModel->setDynamicSortFilter(true);
  tableView->setModel(sortProxyModel);

  tableView->verticalHeader()->hide();
  tableView->setHorizontalScrollMode(QAbstractItemView::ScrollPerPixel);
  tableView->setSelectionBehavior(QAbstractItemView::SelectRows);
  tableView->setSelectionMode(QAbstractItemView::ExtendedSelection);
  tableView->setTextElideMode(Qt::ElideMiddle);
  tableView->setSortingEnabled(true);
  tableView->sortByColumn(0, Qt::AscendingOrder);

  tableView->horizontalHeader()->setResizeMode(0, QHeaderView::ResizeToContents);
  tableView->horizontalHeader()->setResizeMode(2, QHeaderView::ResizeToContents);
  tableView->horizontalHeader()->setResizeMode(5, QHeaderView::ResizeToContents);
  tableView->horizontalHeader()->setStretchLastSection(true);
  tableView->horizontalHeader()->setCascadingSectionResizes(true);

  layout->addWidget(tableView);

  QDialogButtonBox* btnBox = new QDialogButtonBox(QDialogButtonBox::Close);
  layout->addWidget(btnBox);

  this->resize(800, 600);

  connect(btnBox, SIGNAL(rejected()), this, SLOT(reject()));
}

int main(int argc, char *argv[])
{
	QApplication app(argc, argv);
	QWidget * main_wg = new QWidget;

	// cria um objeto "splitter" para compartilhar widgets:    
	QSplitter *splitter = new QSplitter(main_wg);

	// cria um "model" usando o "StandardModel"
	QStandardItemModel *model = new QStandardItemModel;

	const int totCols = 3;
	int col;
	// define os títulos das colunas:
	for (col = 0; col < totCols; ++col) 
	{
		model->setHorizontalHeaderItem(col, 
			new QStandardItem( QString("COL-%1").arg(col+1) ) );
	}
	
	// alimenta linhas, colunas e sub-níveis:	
	QStandardItem *parentItem = model->invisibleRootItem();
	
	const int iniLevel = 0;
	const int totLevels= 3;
	QString prevRows("");
	QVector<QSize> vec_ColsRows; // colunas, linhas de cada nível 
	vec_ColsRows.reserve( totLevels );	
				// quantidade-colunas, quantidade-linhas
	vec_ColsRows << QSize(3,10) << QSize(3,3) << QSize(3,2) ;
	populate_model ( parentItem, vec_ColsRows,
						 iniLevel, prevRows);
	
	// Neste exemplo,
	// O "model" foi alimentado com linhas, colunas e sub-níveis:
	// E serão criadas 4 "views" (uma "tree", uma "table", uma "list" e uma "comboBox")
	// relacionadas ao mesmo "model";
	// Cada "view" exibe os dados de uma determinada maneira;

	// 1- ==== a primeira "view" é uma "tree":
	QTreeView *tree = new QTreeView(splitter);
	tree->setModel(model);
	// habilita classificação na tree:
	tree->setSortingEnabled(true);
	// classifica
	tree->sortByColumn(0);	
	// expande toda a árvore:
	tree->expandAll();
	// força largura de todas as colunas
	// para exibição completa do texto dos seus itens
	for (col = 0; col < totCols; ++col)
		tree->resizeColumnToContents(col);

	// configura o header para permitir mudança na ordem de classificacão:
	QHeaderView * hdrTree = tree->header();
	hdrTree->setClickable (true);
	hdrTree->setSortIndicator(0,Qt::AscendingOrder);
	hdrTree->setSortIndicatorShown(true);
	hdrTree->setMovable(true); // permite mover colunas do header

	// 2- ==== a segunda "view" é uma "table"
	QTableView *table = new QTableView(splitter);
	table->setModel(model);
	table->setAlternatingRowColors(true);
	// habilita classificação na table:
	table->setSortingEnabled(true);
	// classifica
	table->sortByColumn(0);	

	// configura o header para permitir mudança na ordem de classificacão:
	QHeaderView * hdrTable = table->horizontalHeader();
	hdrTable->setClickable (true);
	hdrTable->setSortIndicator(0,Qt::AscendingOrder);
	hdrTable->setSortIndicatorShown(true);
	hdrTable->setMovable(true); // permite mover colunas do header
			
	// 3- ==== a terceira view é uma "list": 
	QListView *list = new QListView(splitter);
	list->setModel(model);

	// 4- ==== a quarta "view" é uma "comboBox"
	QComboBox *combo = new QComboBox;
	combo->setModel(model);

	// configura a "splitter" definindo a largura de cada "view"
	int width = 800;	
	QList< int > cols;
	cols << int(width* 0.45) << int(width*0.45) << int(width*0.1);
	splitter->setSizes(cols);	

	// layout para agrupar a "combo" e a "splitter":
	QGridLayout * glayMain = new QGridLayout;
	main_wg->setLayout( glayMain);
	glayMain->addWidget( combo, 0, 1); // linha 0, coluna 0;
	glayMain->setRowMinimumHeight(1, glayMain->verticalSpacing() * 4); // linha 1: linha de separação
	glayMain->addWidget( splitter, 2, 0, 1, 3 ); // linha 2, coluna 0, rowSpan 1, colSpan 3

	main_wg->setWindowTitle("06_standard - 4 'views' usando o mesmo 'model' (StandardModel) - recursivo");
	main_wg->resize(800,500);	

//.........这里部分代码省略.........