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Giac_maj/epsilon-giac/escher/src/selectable_table_view.cpp 3.85 KB
6663b6c9   adorian   projet complet av...
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  #include <escher/selectable_table_view.h>
  #include <assert.h>
  
  SelectableTableView::SelectableTableView(Responder * parentResponder, TableViewDataSource * dataSource, KDCoordinate horizontalCellOverlapping, KDCoordinate verticalCellOverlapping, KDCoordinate topMargin, KDCoordinate rightMargin, KDCoordinate bottomMargin, KDCoordinate leftMargin,
      SelectableTableViewDataSource * selectionDataSource, SelectableTableViewDelegate * delegate, bool showIndicators, bool colorBackground, KDColor backgroundColor,
      KDCoordinate indicatorThickness, KDColor indicatorColor, KDColor backgroundIndicatorColor, KDCoordinate indicatorMargin) :
    TableView(dataSource, selectionDataSource, horizontalCellOverlapping, verticalCellOverlapping, topMargin, rightMargin, bottomMargin, leftMargin, showIndicators, colorBackground, backgroundColor,
      indicatorThickness, indicatorColor, backgroundIndicatorColor, indicatorMargin),
    Responder(parentResponder),
    m_selectionDataSource(selectionDataSource),
    m_delegate(delegate)
  {
    assert(m_selectionDataSource != nullptr);
  }
  
  int SelectableTableView::selectedRow() {
    return m_selectionDataSource->selectedRow();
  }
  
  int SelectableTableView::selectedColumn() {
    return m_selectionDataSource->selectedColumn();
  }
  
  void SelectableTableView::selectRow(int j) {
    m_selectionDataSource->selectRow(j);
  }
  
  void SelectableTableView::selectColumn(int i) {
    m_selectionDataSource->selectColumn(i);
  }
  
  void SelectableTableView::reloadData() {
    int col = selectedColumn();
    int row = selectedRow();
    deselectTable();
    TableView::reloadData();
    selectCellAtLocation(col, row);
  }
  
  void SelectableTableView::didEnterResponderChain(Responder * previousFirstResponder) {
    selectCellAtLocation(selectedColumn(), selectedRow());
    if (m_delegate) {
      m_delegate->tableViewDidChangeSelection(this, 0, -1);
    }
  }
  
  void SelectableTableView::willExitResponderChain(Responder * nextFirstResponder) {
    unhighlightSelectedCell();
  }
  
  void SelectableTableView::deselectTable() {
    unhighlightSelectedCell();
    int previousSelectedCellX = selectedColumn();
    int previousSelectedCellY = selectedRow();
    selectColumn(0);
    selectRow(-1);
    if (m_delegate) {
      m_delegate->tableViewDidChangeSelection(this, previousSelectedCellX, previousSelectedCellY);
    }
  }
  
  bool SelectableTableView::selectCellAtLocation(int i, int j) {
    if (i < 0 || i >= dataSource()->numberOfColumns()) {
      return false;
    }
    if (j < 0 || j >= dataSource()->numberOfRows()) {
      return false;
    }
    unhighlightSelectedCell();
    int previousX = selectedColumn();
    int previousY = selectedRow();
    selectColumn(i);
    selectRow(j);
    if (selectedRow() >= 0) {
      scrollToCell(i, j);
      HighlightCell * cell = cellAtLocation(i, j);
      cell->setHighlighted(true);
    }
    if (m_delegate) {
      m_delegate->tableViewDidChangeSelection(this, previousX, previousY);
    }
    return true;
  }
  
  HighlightCell * SelectableTableView::selectedCell() {
    if (selectedColumn() < 0 || selectedRow() < 0) {
      return nullptr;
    }
    return cellAtLocation(selectedColumn(), selectedRow());
  }
  
  bool SelectableTableView::handleEvent(Ion::Events::Event event) {
    if (event == Ion::Events::Down) {
      return selectCellAtLocation(selectedColumn(), selectedRow()+1);
    }
    if (event == Ion::Events::Up) {
      return selectCellAtLocation(selectedColumn(), selectedRow()-1);
    }
    if (event == Ion::Events::Left) {
      return selectCellAtLocation(selectedColumn()-1, selectedRow());
    }
    if (event == Ion::Events::Right) {
      return selectCellAtLocation(selectedColumn()+1, selectedRow());
    }
    return false;
  }
  
  void SelectableTableView::unhighlightSelectedCell() {
    if (selectedColumn() >= 0 && selectedColumn() < dataSource()->numberOfColumns() &&
        selectedRow() >= 0 && selectedRow() < dataSource()->numberOfRows()) {
      HighlightCell * previousCell = cellAtLocation(selectedColumn(), selectedRow());
      previousCell->setHighlighted(false);
    }
  }