freezetablewidget.cpp Example File

itemviews/frozencolumn/freezetablewidget.cpp
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#include "freezetablewidget.h" #include <QScrollBar> #include <QHeaderView> FreezeTableWidget::FreezeTableWidget(QAbstractItemModel * model) { setModel(model); frozenTableView = new QTableView(this); init(); //connect the headers and scrollbars of both tableviews together connect(horizontalHeader(),&QHeaderView::sectionResized, this, &FreezeTableWidget::updateSectionWidth); connect(verticalHeader(),&QHeaderView::sectionResized, this, &FreezeTableWidget::updateSectionHeight); connect(frozenTableView->verticalScrollBar(), &QAbstractSlider::valueChanged, verticalScrollBar(), &QAbstractSlider::setValue); connect(verticalScrollBar(), &QAbstractSlider::valueChanged, frozenTableView->verticalScrollBar(), &QAbstractSlider::setValue); } FreezeTableWidget::~FreezeTableWidget() { delete frozenTableView; } void FreezeTableWidget::init() { frozenTableView->setModel(model()); frozenTableView->setFocusPolicy(Qt::NoFocus); frozenTableView->verticalHeader()->hide(); frozenTableView->horizontalHeader()->setSectionResizeMode(QHeaderView::Fixed); viewport()->stackUnder(frozenTableView); frozenTableView->setStyleSheet("QTableView { border: none;" "background-color: #8EDE21;" "selection-background-color: #999}"); //for demo purposes frozenTableView->setSelectionModel(selectionModel()); for (int col = 1; col < model()->columnCount(); ++col) frozenTableView->setColumnHidden(col, true); frozenTableView->setColumnWidth(0, columnWidth(0) ); frozenTableView->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff); frozenTableView->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff); frozenTableView->show(); updateFrozenTableGeometry(); setHorizontalScrollMode(ScrollPerPixel); setVerticalScrollMode(ScrollPerPixel); frozenTableView->setVerticalScrollMode(ScrollPerPixel); } void FreezeTableWidget::updateSectionWidth(int logicalIndex, int /* oldSize */, int newSize) { if (logicalIndex == 0){ frozenTableView->setColumnWidth(0, newSize); updateFrozenTableGeometry(); } } void FreezeTableWidget::updateSectionHeight(int logicalIndex, int /* oldSize */, int newSize) { frozenTableView->setRowHeight(logicalIndex, newSize); } void FreezeTableWidget::resizeEvent(QResizeEvent * event) { QTableView::resizeEvent(event); updateFrozenTableGeometry(); } QModelIndex FreezeTableWidget::moveCursor(CursorAction cursorAction, Qt::KeyboardModifiers modifiers) { QModelIndex current = QTableView::moveCursor(cursorAction, modifiers); if (cursorAction == MoveLeft && current.column() > 0 && visualRect(current).topLeft().x() < frozenTableView->columnWidth(0) ){ const int newValue = horizontalScrollBar()->value() + visualRect(current).topLeft().x() - frozenTableView->columnWidth(0); horizontalScrollBar()->setValue(newValue); } return current; } void FreezeTableWidget::scrollTo (const QModelIndex & index, ScrollHint hint){ if (index.column() > 0) QTableView::scrollTo(index, hint); } void FreezeTableWidget::updateFrozenTableGeometry() { frozenTableView->setGeometry(verticalHeader()->width() + frameWidth(), frameWidth(), columnWidth(0), viewport()->height()+horizontalHeader()->height()); }