@Override
  public void onMouseUp(MouseUpEvent event) {
    event.preventDefault();
    event.stopPropagation();

    if (this.activeLook) {
      switch (event.getNativeButton()) {
        case NativeEvent.BUTTON_LEFT:
          this.moveForward = false;
          break;
        case NativeEvent.BUTTON_RIGHT:
          this.moveBackward = false;
          break;
      }
    }
  }
  public void onMouseUp(MouseUpEvent e) {

    GPoint p = table.getIndexFromPixel(e.getClientX(), e.getClientY());
    if (p.getY() == 0 && p.getX() > 0) {
      if (table.isEditing()) editor.cancelCellEditing();
      table.scc.onMouseUp(e);
      return;
    } else if (p.getX() == 0 && p.getY() > 0) {
      if (table.isEditing()) editor.cancelCellEditing();
      table.srh.onMouseUp(e);
      return;
    }

    mouseIsDown = false;
    e.preventDefault();
    boolean eConsumed = false;

    boolean rightClick = (e.getNativeButton() == NativeEvent.BUTTON_RIGHT);

    if (table.getTableMode() == MyTable.TABLE_MODE_AUTOFUNCTION) {
      table.stopAutoFunction();
      return;
    }

    if (!rightClick) {
      if (editor.isEditing()) {
        String text = editor.getEditingValue();
        if (text.startsWith("=")) {
          GPoint point = table.getIndexFromPixel(e.getClientX(), e.getClientY());
          if (point != null) {
            int column = point.getX();
            int row = point.getY();
            if (column != editor.column || row != editor.row) {
              eConsumed = true;
            }
          }
        }
        selectedCellName = null;
        prefix0 = null;
        postfix0 = null;
        table.isDragging2 = false;
        table.repaint();
      }

      if (table.isOverDot) {
        // prevent UI manager from changing selection when mouse
        // is in a neighbor cell but is still over the dot region
        eConsumed = true;
      }

      if (table.isDragingDot) {
        if (table.dragingToColumn == -1 || table.dragingToRow == -1) return;
        int x1 = -1;
        int y1 = -1;
        int x2 = -1;
        int y2 = -1;
        // -|1|-
        // 2|-|3
        // -|4|-
        if (table.dragingToColumn < table.minSelectionColumn) { // 2
          x1 = table.dragingToColumn;
          y1 = table.minSelectionRow;
          x2 = table.minSelectionColumn - 1;
          y2 = table.maxSelectionRow;
        } else if (table.dragingToRow > table.maxSelectionRow) { // 4
          x1 = table.minSelectionColumn;
          y1 = table.maxSelectionRow + 1;
          x2 = table.maxSelectionColumn;
          y2 = table.dragingToRow;
        } else if (table.dragingToRow < table.minSelectionRow) { // 1
          x1 = table.minSelectionColumn;
          y1 = table.dragingToRow;
          x2 = table.maxSelectionColumn;
          y2 = table.minSelectionRow - 1;
        } else if (table.dragingToColumn > table.maxSelectionColumn) { // 3
          x1 = table.maxSelectionColumn + 1;
          y1 = table.minSelectionRow;
          x2 = table.dragingToColumn;
          y2 = table.maxSelectionRow;
        }

        // copy the cells
        boolean succ =
            relativeCopy.doDragCopy(
                table.minSelectionColumn - 1,
                table.minSelectionRow - 1,
                table.maxSelectionColumn - 1,
                table.maxSelectionRow - 1,
                x1 - 1,
                y1 - 1,
                x2 - 1,
                y2 - 1);
        if (succ) {
          app.storeUndoInfo();
        }

        // extend the selection to include the drag copy selection
        table.setSelection(
            Math.min(x1, table.minSelectionColumn) - 1,
            Math.min(y1, table.minSelectionRow) - 1,
            Math.max(x2, table.maxSelectionColumn) - 1,
            Math.max(y2, table.maxSelectionRow) - 1);

        // reset flags and cursor
        table.isOverDot = false;
        table.isDragingDot = false;
        table.dragingToRow = -1;
        table.dragingToColumn = -1;
        // TODO//setTableCursor();

        // prevent UI manager from changing selection
        eConsumed = true;

        table.repaint();
      }
    }

    // Alt click: copy definition to input field
    if (!table.isEditing() && e.isAltKeyDown() && app.showAlgebraInput()) {
      int row = p.getY(); // table.rowAtPoint(e.getPoint());
      int col = p.getX(); // table.columnAtPoint(e.getPoint());
      GeoElement geo = (GeoElement) model.getValueAt(row - 1, col - 1);

      if (geo != null) {
        // F3 key: copy definition to input bar
        app.getGlobalKeyDispatcher().handleFunctionKeyForAlgebraInput(3, geo);
        return;
      }
    }

    // handle right click
    if (rightClick) {
      if (!((AppW) kernel.getApplication()).letShowPopupMenu()) return;

      // change selection if right click is outside current selection
      if (p.getY() < table.minSelectionRow
          || p.getY() > table.maxSelectionRow
          || p.getX() < table.minSelectionColumn
          || p.getX() > table.maxSelectionColumn) {
        // switch to cell selection mode

        if (table.getSelectionType() != MyTable.CELL_SELECT) {
          table.setSelectionType(MyTable.CELL_SELECT);
        }

        // now change the selection
        if (p.getX() > 0 && p.getY() > 0)
          table.changeSelection(p.getY() - 1, p.getX() - 1, false, false);
      }

      // create and show context menu
      /*TODO SpreadsheetContextMenu popupMenu = new SpreadsheetContextMenu(
      		table, e.isShiftDown());
      popupMenu.show(e.getComponent(), e.getX(), e.getY());*/
    }

    if (eConsumed) return;

    // MyTable's default listeners follow, they should be simulated in Web e.g. here

    // change selection if right click is outside current selection
    if (p.getY() != table.leadSelectionRow + 1 || p.getX() != table.leadSelectionColumn + 1) {
      // switch to cell selection mode

      if (p.getY() > 0 && p.getX() > 0) {

        if (table.getSelectionType() != MyTable.CELL_SELECT) {
          table.setSelectionType(MyTable.CELL_SELECT);
        }

        // now change the selection
        table.changeSelection(p.getY() - 1, p.getX() - 1, false, true);
        table.repaint();
      }
    }
  }