TableViewContent.cpp

 
/* SPDX-License-Identifier: CC0-1.0 */
 
#include "TableViewContent.h"
 
#include <cmath>
#include <iostream>
 
#include <QAction>
#include <QApplication>
#include <QDebug>
#include <QLabel>
#include <QMenu>
#include <QMessageBox>
#include <QMutex>
#include <QPainter>
#include <QPaintEvent>
#include <QRect>
#include <QScrollBar>
#include <QSize>
#include <QStyle>
#include <QStyleOptionViewItemV4>
#include <QThread>
#include <QVBoxLayout>
 
#include "ControlMeasure.h"
#include "IException.h"
#include "IString.h"
 
#include "AbstractTableDelegate.h"
#include "AbstractTableModel.h"
#include "AbstractTreeItem.h"
#include "TableColumn.h"
#include "TableColumnList.h"
#include <ControlPoint.h>
 
 
namespace Isis {
  TableViewContent::TableViewContent(AbstractTableModel *someModel) {
    nullify();
 
    m_model = someModel;
    connect(m_model, SIGNAL(modelModified()), this, SLOT(refresh()));
    connect(m_model, SIGNAL(filterProgressChanged(int)),
        this, SLOT(updateItemList()));
    connect(this, SIGNAL(modelDataChanged()),
        m_model, SLOT(applyFilter()));
    connect(this,
        SIGNAL(tableSelectionChanged(QList< AbstractTreeItem * >)),
        m_model,
        SIGNAL(tableSelectionChanged(QList< AbstractTreeItem * >)));
    connect(m_model, SIGNAL(treeSelectionChanged(QList< AbstractTreeItem * >)),
        this, SLOT(scrollTo(QList< AbstractTreeItem * >)));
 
    m_columns = getModel()->getColumns();
    for (int i = 0; i < m_columns->size(); i++) {
      TableColumn *column = (*m_columns)[i];
 
      connect(column, SIGNAL(visibilityChanged()), this, SLOT(refresh()));
      connect(column, SIGNAL(visibilityChanged()),
          this, SLOT(updateHorizontalScrollBar()));
      connect(column, SIGNAL(widthChanged()), this, SLOT(refresh()));
    }
 
    m_items = new QList< QPointer<AbstractTreeItem> >;
    m_activeCell = new QPair<AbstractTreeItem *, int>(NULL, -1);
    rowsWithActiveColumnSelected = new QList<AbstractTreeItem *>;
    m_lastShiftSelection = new QList<AbstractTreeItem *>;
    m_lastShiftArrowSelectedCell = new QPair< AbstractTreeItem *, int >;
    m_lastShiftArrowSelectedCell->first = NULL;
 
    verticalScrollBar()->setSingleStep(1);
 
    m_rowHeight = QFontMetrics(font()).height() + ITEM_PADDING;
 
    connect(horizontalScrollBar(), SIGNAL(valueChanged(int)),
        this, SIGNAL(horizontalScrollBarValueChanged(int)));
 
    setMouseTracking(true);
    updateHorizontalScrollBar();
 
    createActions();
 
    setContextMenuPolicy(Qt::CustomContextMenu);
    connect(this, SIGNAL(customContextMenuRequested(QPoint)),
        this, SLOT(showContextMenu(QPoint)));
 
    m_activeControlNet = false;
  }
 
 
  TableViewContent::~TableViewContent() {
    delete m_items;
    m_items = NULL;
 
    delete m_activeCell;
    m_activeCell = NULL;
 
    delete m_editWidget;
    m_editWidget = NULL;
 
    delete m_lastShiftSelection;
    m_lastShiftSelection = NULL;
 
    delete m_applyToSelectionAct;
    m_applyToSelectionAct = NULL;
 
    delete m_applyToAllAct;
    m_applyToAllAct = NULL;
 
    delete m_deleteSelectedRowsAct;
    m_deleteSelectedRowsAct = NULL;
 
    delete m_editControlPointAct;
    m_editControlPointAct = NULL;
 
    delete m_lastShiftArrowSelectedCell;
    m_lastShiftArrowSelectedCell = NULL;
 
    m_columns = NULL;
  }
 
 
  QSize TableViewContent::minimumSizeHint() const {
    return QWidget::minimumSizeHint();
  }
 
 
  QSize TableViewContent::sizeHint() const {
    return minimumSizeHint();
  }
 
 
  AbstractTableModel *TableViewContent::getModel() {
    return m_model;
  }
 
 
  //   void TableViewContent::setModel(AbstractTableModel * someModel)
  //   {
  //     if (!someModel)
  //     {
  //       IString msg = "Attempted to set a NULL m_model!";
  //       throw iException::Message(iException::Programmer, msg, _FILEINFO_);
  //     }
  //
  //     if (getModel())
  //     {
  //       disconnect(getModel(), SIGNAL(m_modelModified()), this, SLOT(refresh()));
  //       disconnect(getModel(), SIGNAL(filterProgressChanged(int)),
  //                  this, SLOT(updateItemList()));
  //       disconnect(this,
  //                  SIGNAL(tableSelectionChanged(QList< AbstractTreeItem * >)),
  //                  getModel(),
  //                  SIGNAL(tableSelectionChanged(QList< AbstractTreeItem * >)));
  //       disconnect(getModel(), SIGNAL(selectionChanged(QList<AbstractTreeItem*>)),
  //                  this, SLOT(scrollTo(QList<AbstractTreeItem*>)));
  //     }
  //
  //     m_model = someModel;
  //     m_columns = someModel->getColumns();
  //
  //     connect(m_model, SIGNAL(m_modelModified()), this, SLOT(refresh()));
  //     connect(m_model, SIGNAL(filterProgressChanged(int)),
  //             this, SLOT(updateItemList()));
  //     connect(this, SIGNAL(m_modelDataChanged()),
  //             m_model, SLOT(applyFilter()));
  //     connect(this, SIGNAL(tableSelectionChanged(QList< AbstractTreeItem * >)),
  //             m_model, SIGNAL(tableSelectionChanged(QList< AbstractTreeItem * >)));
  //     connect(m_model, SIGNAL(treeSelectionChanged(QList<AbstractTreeItem*>)),
  //             this, SLOT(scrollTo(QList<AbstractTreeItem*>)));
  //
  //     refresh();
  //   }
 
 
  void TableViewContent::setActiveControlNet(bool activeNet) {
    m_activeControlNet = activeNet;
  }
 
 
  void TableViewContent::refresh() {
    if (m_model) {
      if (!m_model->isFiltering()) {
        int rowCount = m_model->getVisibleRowCount();
        verticalScrollBar()->setRange(0, qMax(rowCount - 1, 0));
      }
 
      updateItemList();
      m_lastDirectlySelectedRow = NULL;
      m_lastShiftSelection->clear();
 
      if (m_model->getSelectedItems().size() &&
          rowsWithActiveColumnSelected->size()) {
        m_lastDirectlySelectedRow = NULL;
        clearColumnSelection();
      }
 
      viewport()->update();
    }
  }
 
 
  void TableViewContent::updateHorizontalScrollBar(bool scrollRight) {
    if (m_columns) {
      int range = 0;
      TableColumnList visibleCols = m_columns->getVisibleColumns();
      for (int i = 0; i < visibleCols.size(); i++)
        range += visibleCols[i]->getWidth() - 1;
 
      // For the border...
      range -= 2;
      horizontalScrollBar()->setRange(0, range - viewport()->width());
      horizontalScrollBar()->setPageStep(viewport()->width());
 
      if (scrollRight)
        horizontalScrollBar()->setValue(horizontalScrollBar()->maximum());
    }
  }
 
 
  void TableViewContent::scrollTo(
    QList< AbstractTreeItem * > newlySelectedItems) {
    if (newlySelectedItems.size())
      scrollTo(newlySelectedItems.last());
  }
 
 
  void TableViewContent::scrollTo(AbstractTreeItem *newlySelectedItem) {
    int row = getModel()->indexOfVisibleItem(newlySelectedItem);
 
    if (row >= 0) {
      int topRow = verticalScrollBar()->value();
 
      if (row < topRow) {
        verticalScrollBar()->setValue(row);
      }
      else {
        int wholeVisibleRowCount = viewport()->height() / m_rowHeight;
        int bottomRow = topRow + wholeVisibleRowCount;
        if (row > bottomRow)
          verticalScrollBar()->setValue(row - wholeVisibleRowCount + 1);
      }
    }
 
    viewport()->update();
  }
 
 
  bool TableViewContent::eventFilter(QObject *target, QEvent *event) {
    return QObject::eventFilter(target, event);
  }
 
 
  void TableViewContent::mouseDoubleClickEvent(QMouseEvent *event) {
    if (event->buttons() & Qt::LeftButton) {
      int rowNum = event->pos().y() / m_rowHeight;
 
      if (m_activeCell->first && cellIsEditable(rowNum, m_activeCell->second)) {
        const AbstractTableDelegate *delegate = m_model->getDelegate();
        TableColumn *col =
          m_columns->getVisibleColumns()[m_activeCell->second];
 
        delete m_editWidget;
        m_editWidget = NULL;
        m_editWidget = delegate->getWidget(col);
        delegate->readData(m_editWidget, m_activeCell->first, col);
        m_editWidget->setParent(this);
        m_editWidget->setFocus(Qt::OtherFocusReason);
      }
 
      viewport()->update();
    }
  }
 
 
  void TableViewContent::mousePressEvent(QMouseEvent *event) {
 
    if (event->buttons() & Qt::LeftButton) {
      // FIXME refactor this file (lol)
      if (!(event->modifiers() & Qt::ShiftModifier))
        updateActiveCell(event->pos());
 
      int rowNum = event->pos().y() / m_rowHeight;
      int colNum = getColumnFromScreenX(event->pos().x());
 
      // HACK
      // BUG
      // TODO
      // FIXME
      if (colNum == 0)
        clearActiveCell();
 
      if (rowNum >= 0 && rowNum < m_items->size() && m_activeCell->first) {
        // The user clicked on a valid item, handle selection of individual
        // cells (not rows).
 
        // Deselect all rows, as this will now be a cell selection.
        m_model->setGlobalSelection(false);
 
        if (cellIsEditable(rowNum, m_activeCell->second)) {
          if (event->modifiers() & Qt::ControlModifier) {
            if (rowsWithActiveColumnSelected->indexOf(m_activeCell->first) < 0)
              rowsWithActiveColumnSelected->append(m_activeCell->first);
            else
              rowsWithActiveColumnSelected->removeAll(m_activeCell->first);
            m_lastDirectlySelectedRow = m_activeCell->first;
 
            m_lastShiftSelection->clear();
          }
          else {
            if (event->modifiers() & Qt::ShiftModifier) {
              updateColumnGroupSelection((*m_items)[rowNum]);
            }
            else {
              // Normal click, no modifiers.
              clearColumnSelection();
              rowsWithActiveColumnSelected->append(m_activeCell->first);
              m_lastDirectlySelectedRow = m_activeCell->first;
              m_lastShiftSelection->clear();
            }
          }
        }
      }
      else {
        // row selections
        if (rowNum >= 0 && rowNum < m_items->size()) {
          int columnNum = getColumnFromScreenX(event->pos().x());
 
          if (columnNum != -1) {
            TableColumn *column = m_columns->getVisibleColumns()[columnNum];
            if (column->getTitle().isEmpty()) {
              clearColumnSelection();
 
              AbstractTreeItem *const &item = m_items->at(rowNum);
              QList< AbstractTreeItem * > newlySelectedItems;
 
              if (event->modifiers() & Qt::ControlModifier) {
                if (item->getPointerType() == AbstractTreeItem::Measure)
                  item->parent()->setSelected(!item->isSelected());
 
                item->setSelected(!item->isSelected());
                m_lastDirectlySelectedRow = item;
                newlySelectedItems.append(item);
              }
              else {
                if (event->modifiers() & Qt::ShiftModifier) {
                  newlySelectedItems = updateRowGroupSelection(rowNum);
                }
                else {
                  QList<AbstractTreeItem *> selectedItems =
                    m_model->getSelectedItems();
 
                  foreach (AbstractTreeItem * selectedItem, selectedItems) {
                    if (selectedItem->getPointerType() ==
                        AbstractTreeItem::Measure)
                      selectedItem->parent()->setSelected(false);
                  }
 
                  m_model->setGlobalSelection(false);
 
                  if (item->getPointerType() == AbstractTreeItem::Measure)
                    item->parent()->setSelected(true);
 
                  item->setSelected(true);
                  m_lastDirectlySelectedRow = item;
                  newlySelectedItems.append(item);
                }
              }
 
              QList< AbstractTreeItem * > tmp = newlySelectedItems;
              newlySelectedItems.clear();
              foreach (AbstractTreeItem * i, tmp) {
                newlySelectedItems.append(i);
                if (i->getPointerType() == AbstractTreeItem::Point) {
                  foreach (AbstractTreeItem * child, i->getChildren()) {
                    child->setSelected(true);
                    newlySelectedItems.append(child);
                  }
                }
              }
 
              emit tableSelectionChanged(newlySelectedItems);
            }
          }
        }
      }
 
      delete m_editWidget;
      m_editWidget = NULL;
 
      viewport()->update();
      emit tableSelectionChanged();
    }
  }
 
 
  void TableViewContent::mouseReleaseEvent(QMouseEvent *event) {
  }
 
 
  void TableViewContent::mouseMoveEvent(QMouseEvent *event) {
    if (!m_editWidget) {
      if (event->buttons() & Qt::LeftButton) {
        int rowNum = event->pos().y() / m_rowHeight;
 
        // used to make sure that the mouse position is inside the content
        int yPos = event->pos().y();
        if (yPos >= 0 && rowNum < m_items->size() && m_activeCell->first) {
          // The user clicked on a valid item,
          // handle selection of individual cells (not rows).
          if (cellIsEditable(rowNum, m_activeCell->second)) {
            updateColumnGroupSelection((*m_items)[rowNum]);
          }
        }
        else {
          // row selections
          if (yPos >= 0 && rowNum < m_items->size()) {
            // There is no active cell,
            // maybe they clicked on the row number column.
            int columnNum = getColumnFromScreenX(event->pos().x());
 
            if (columnNum != -1) {
              clearColumnSelection();
 
              QList< AbstractTreeItem * > tmp =
                updateRowGroupSelection(rowNum);
              QList< AbstractTreeItem * > newlySelectedItems;
              foreach (AbstractTreeItem * i, tmp) {
                newlySelectedItems.append(i);
                if (i->getPointerType() == AbstractTreeItem::Point) {
                  foreach (AbstractTreeItem * child, i->getChildren()) {
                    child->setSelected(true);
                    newlySelectedItems.append(child);
                  }
                }
              }
 
              emit tableSelectionChanged(newlySelectedItems);
            }
          }
        }
 
        QScrollBar *vertScroll = verticalScrollBar();
 
        if (yPos > viewport()->height() &&
            vertScroll->value() < vertScroll->maximum()) {
          // Scroll down to allow for more drag selections.
          vertScroll->setValue(vertScroll->value() + 1);
        }
        else {
          if (yPos < 0 && vertScroll->value() > vertScroll->minimum())
            vertScroll->setValue(vertScroll->value() - 1);
        }
 
        viewport()->update();
        emit tableSelectionChanged();
      }
    }
  }
 
 
  void TableViewContent::leaveEvent(QEvent *event) {
    //     viewport()->update();
  }
 
 
  void TableViewContent::keyPressEvent(QKeyEvent *event) {
    Qt::Key key = (Qt::Key) event->key();
 
    // Handle Ctrl-A (selects all rows)
    if (key == Qt::Key_A && event->modifiers() == Qt::ControlModifier) {
      clearActiveCell();
      clearColumnSelection();
      m_model->setGlobalSelection(true);
      viewport()->update();
 
      emit tableSelectionChanged();
    }
 
    // Handle esc key (cancel editing)
    else if (key == Qt::Key_Escape) {
      if (m_editWidget) {
        delete m_editWidget;
        m_editWidget = NULL;
        setFocus(Qt::ActiveWindowFocusReason);
        viewport()->update();
      }
    }
 
    // Handle delete key (delete row(s) if any are selected)
    else if (key == Qt::Key_Delete) {
      if (hasRowSelection())
        deleteSelectedRows();
    }
 
    // Handle return or enter (stop editing)
    else if (key == Qt::Key_Return || key == Qt::Key_Enter) {
      finishEditing();
      moveActiveCellDown();
    }
 
    // Handle
    else if (key == Qt::Key_Tab) {
      finishEditing();
      moveActiveCellRight();
    }
 
    // Handle arrow key navigation
    else if (key == Qt::Key_Up || key == Qt::Key_Down ||
        key == Qt::Key_Left || key == Qt::Key_Right) {
      if (!hasActiveCell()) {
        if (m_items && m_items->size()) {
          m_activeCell->first = (*m_items)[0];
          m_activeCell->second = 1;
        }
      }
 
      if (hasActiveCell() && !m_editWidget) {
 
        // Handle up arrow with shift pressed
        if (key == Qt::Key_Up && event->modifiers() == Qt::ShiftModifier) {
 
          AbstractTreeItem *prevCell = m_lastShiftArrowSelectedCell->first ?
              m_lastShiftArrowSelectedCell->first : m_activeCell->first;
 
          int prevCellIndex = getModel()->indexOfVisibleItem(prevCell);
 
          if (prevCellIndex > 0) {
            QList< AbstractTreeItem * > itemList =
              getModel()->getItems(prevCellIndex - 1, prevCellIndex);
 
            if (itemList.size()) {
              AbstractTreeItem *curItem = itemList[0];
 
              if (rowsWithActiveColumnSelected->contains(curItem) ||
                  curItem == m_activeCell->first)
                rowsWithActiveColumnSelected->removeAll(prevCell);
              else
                rowsWithActiveColumnSelected->append(curItem);
 
              if (curItem == m_activeCell->first)
                m_lastShiftArrowSelectedCell->first = NULL;
              else
                m_lastShiftArrowSelectedCell->first = curItem;
              m_lastShiftArrowSelectedCell->second = m_activeCell->second;
 
              // scroll if needed
              int m_itemsPrevIndex = m_items->indexOf(prevCell);
              int m_itemsCurIndex = m_items->indexOf(curItem);
              if (m_itemsCurIndex == -1) {
                if (m_itemsPrevIndex == 0) { // then need to scroll up!
                  verticalScrollBar()->setValue(qMax(0, prevCellIndex - 1));
                }
                else {
                  //int m_itemsLastIndex = m_items->size() - 1;
                  //verticalScrollBar()->setValue(qMin(prevCell + 1, ));
                }
              }
 
              viewport()->update();
            }
          }
        }
 
        // Handle down arrow with shift pressed
        else if (key == Qt::Key_Down && event->modifiers() == Qt::ShiftModifier) {
          AbstractTreeItem *prevCell = m_lastShiftArrowSelectedCell->first ?
              m_lastShiftArrowSelectedCell->first : m_activeCell->first;
 
          int prevCellIndex = getModel()->indexOfVisibleItem(prevCell);
 
          if (prevCellIndex >= 0 &&
              prevCellIndex < getModel()->getVisibleRowCount() - 1) {
            QList< AbstractTreeItem * > itemList =
              getModel()->getItems(prevCellIndex + 1, prevCellIndex + 2);
 
            if (itemList.size()) {
              AbstractTreeItem *curItem = itemList[0];
 
              if (rowsWithActiveColumnSelected->contains(curItem) ||
                  curItem == m_activeCell->first)
                rowsWithActiveColumnSelected->removeAll(prevCell);
              else
                rowsWithActiveColumnSelected->append(curItem);
 
              if (curItem == m_activeCell->first)
                m_lastShiftArrowSelectedCell->first = NULL;
              else
                m_lastShiftArrowSelectedCell->first = curItem;
              m_lastShiftArrowSelectedCell->second = m_activeCell->second;
              viewport()->update();
 
              // scroll if needed
              int m_itemsPrevIndex = m_items->indexOf(prevCell);
              int m_itemsCurIndex = m_items->indexOf(curItem);
              if (m_itemsCurIndex == -1) {
                if (m_itemsPrevIndex == m_items->size() - 1) {
                  int visibleItemCount = getModel()->getVisibleRowCount();
                  verticalScrollBar()->setValue(qMin(visibleItemCount,
                      getModel()->indexOfVisibleItem(m_items->at(1))));
                }
                else {
                  //int m_itemsLastIndex = m_items->size() - 1;
                  //verticalScrollBar()->setValue(qMin(prevCell + 1, ));
                }
              }
            }
          }
        }
 
        // Handle up arrow
        else if (key == Qt::Key_Up) {
          moveActiveCellUp();
        }
 
        // Handle down arrow
        else if (key == Qt::Key_Down) {
          moveActiveCellDown();
        }
 
        // Handle left arrow
        else if (key == Qt::Key_Left) {
          moveActiveCellLeft();
        }
 
        // Handle right arrow
        else if (key == Qt::Key_Right) {
          moveActiveCellRight();
        }
      }
    }
 
    // start editing the active cell
    else {
      // event->text() will be empty if a modifier was pressed.
      if (hasActiveCell() && !event->text().isEmpty()) {
        if (!m_items->contains(m_activeCell->first))
          scrollTo(m_activeCell->first);
 
        if (m_items->contains(m_activeCell->first) &&
            cellIsEditable(m_items->indexOf(m_activeCell->first),
                m_activeCell->second)) {
          AbstractTableDelegate const *delegate = m_model->getDelegate();
          TableColumn *col =
            m_columns->getVisibleColumns()[m_activeCell->second];
 
          delete m_editWidget;
          m_editWidget = NULL;
          m_editWidget = delegate->getWidget(col);
          delegate->readData(m_editWidget, m_activeCell->first, col, event->text());
          m_editWidget->setParent(this);
          m_editWidget->setFocus(Qt::OtherFocusReason);
        }
 
        viewport()->update();
      }
    }
  }
 
 
  void TableViewContent::finishEditing() {
    if (m_editWidget) {
      TableColumn *col =
        m_columns->getVisibleColumns()[m_activeCell->second];
      getModel()->getDelegate()->saveData(
        m_editWidget, m_activeCell->first, col);
      delete m_editWidget;
      m_editWidget = NULL;
 
      cellDataChanged(col);
      setFocus(Qt::ActiveWindowFocusReason);
    }
  }
 
 
  void TableViewContent::moveActiveCellUp() {
    int activeIndex = m_items->indexOf(m_activeCell->first);
    if (activeIndex != -1) {
      if (activeIndex == 0) {
        int row = qMax(0, getModel()->indexOfVisibleItem(
            m_activeCell->first) - 1);
 
        verticalScrollBar()->setValue(row);
      }
 
      m_activeCell->first = (*m_items)[qMax(0, activeIndex - 1)];
      clearColumnSelection();
      viewport()->update();
    }
  }
 
 
  void TableViewContent::moveActiveCellDown() {
    int activeIndex = m_items->indexOf(m_activeCell->first);
    if (activeIndex != -1) {
      if (activeIndex == m_items->size() - 1) {
        int row = qMin(getModel()->getVisibleRowCount() - 1,
            getModel()->indexOfVisibleItem(m_items->at(0)));
 
        verticalScrollBar()->setValue(row + 1);
        activeIndex = m_items->indexOf(m_activeCell->first);
      }
 
      m_activeCell->first = (*m_items)[qMin(activeIndex + 1, m_items->size() - 1)];
      clearColumnSelection();
      viewport()->update();
    }
  }
 
 
  void TableViewContent::moveActiveCellLeft() {
    m_activeCell->second = qMax(1, m_activeCell->second - 1);
    int leftMostVisibleCol = getColumnFromScreenX(0);
    if (leftMostVisibleCol == m_activeCell->second) {
      horizontalScrollBar()->setValue(horizontalScrollBar()->value() -
          m_columns->getVisibleColumns()[m_activeCell->second]->getWidth());
    }
 
    clearColumnSelection();
    viewport()->update();
  }
 
 
  void TableViewContent::moveActiveCellRight() {
    m_activeCell->second = qMin(m_columns->getVisibleColumns().size() - 1,
        m_activeCell->second + 1);
    int rightMostVisibleCol = getColumnFromScreenX(viewport()->width());
    if (rightMostVisibleCol == m_activeCell->second) {
      horizontalScrollBar()->setValue(horizontalScrollBar()->value() +
          m_columns->getVisibleColumns()[m_activeCell->second]->getWidth());
    }
 
    clearColumnSelection();
    viewport()->update();
  }
 
 
  void TableViewContent::paintEvent(QPaintEvent *event) {
    if (m_model && m_columns) {
      //       int startRow = verticalScrollBar()->value();
      int rowCount = (int) ceil(viewport()->height() / (double) m_rowHeight);
 
      QPainter painter(viewport());
      painter.setRenderHint(QPainter::Antialiasing, false);
      //      painter.setRenderHints(QPainter::NonCosmeticDefaultPen, true);
 
      bool editWidgetVisible = false;
      for (int i = 0; i < rowCount; i++) {
        // define the top left corner of the row and also how big the row is
        QPoint relativeTopLeft(0, i * m_rowHeight);
        QPoint scrollBarPos(horizontalScrollBar()->value(),
            verticalScrollBar()->value());
        QPoint absoluteTopLeft(relativeTopLeft + scrollBarPos);
        QSize rowSize(viewport()->width(), (int) m_rowHeight);
 
        // Fill in the background with the background color
        painter.fillRect(QRect(relativeTopLeft, rowSize), palette().base());
 
        if (i < m_items->size()) {
 
 
 
 
 
 
          // ********************************************************
          // HACK: FIXME: ask tree m_items if background needs to be
          // darkened, instead figuring that out here.  Also, change
          // composition mode so that ref measure rows look different
          // when they are highlighted as well
          /*
          if (m_items->at(i)->getPointerType() == AbstractTreeItem::Measure)
          {
            ControlMeasure * cm = (ControlMeasure *) m_items->at(i)->getPointer();
            if (cm->Parent()->GetRefMeasure() == cm)
            {
              QPoint selectionTopLeft(-absoluteTopLeft.x(), relativeTopLeft.y());
              QSize selectionSize(m_columns->getVisibleWidth(), (int) m_rowHeight);
 
              QRect selectionRect(selectionTopLeft, selectionSize);
              QColor color = palette().base().color();
              painter.fillRect(selectionRect, color.darker(110));
            }
          }
          */
          //*********************************************************
 
 
 
 
 
 
 
 
 
 
 
 
          if (m_items->at(i)->isSelected()) {
            QPoint selectionTopLeft(-absoluteTopLeft.x(), relativeTopLeft.y());
            QSize selectionSize(m_columns->getVisibleWidth(), (int) m_rowHeight);
 
            QRect selectionRect(selectionTopLeft, selectionSize);
            painter.fillRect(selectionRect, palette().highlight().color());
          }
 
          paintRow(&painter, i, absoluteTopLeft, relativeTopLeft);
        }
      }
 
      for (int i = 0; i < rowCount; i++) {
        if (i < m_items->size()) {
          QPoint relativeTopLeft(0, i * m_rowHeight);
          if (m_editWidget && m_activeCell->first == m_items->at(i)) {
            QPair<int, int> xRange(
              m_columns->getVisibleXRange(m_activeCell->second));
 
            m_editWidget->move(
              QPoint(xRange.first - horizontalScrollBar()->value() - 1,
                  relativeTopLeft.y() + 1));
            m_editWidget->resize(xRange.second - xRange.first, m_rowHeight + 1);
            m_editWidget->setVisible(true);
            editWidgetVisible = true;
          }
          else {
            if (m_activeCell->first == m_items->at(i)) {
              QPair<int, int> activeXArea =
                m_columns->getVisibleXRange(m_activeCell->second);
 
              QRect activeArea(activeXArea.first, relativeTopLeft.y(),
                  activeXArea.second - activeXArea.first, m_rowHeight);
 
              activeArea.moveLeft(
                activeArea.left() - horizontalScrollBar()->value());
              activeArea.adjust(-1, -1, -2, -1);
              QPen pen(Qt::black);
              pen.setWidth(3);
              painter.setPen(pen);
              painter.drawRect(activeArea);
            }
          }
        }
      }
 
      if (m_editWidget && !editWidgetVisible)
        m_editWidget->setVisible(false);
    }
    else {
      QWidget::paintEvent(event);
    }
  }
 
 
  void TableViewContent::resizeEvent(QResizeEvent *event) {
    QAbstractScrollArea::resizeEvent(event);
    updateHorizontalScrollBar();
    updateItemList();
  }
 
 
  void TableViewContent::scrollContentsBy(int dx, int dy) {
    QAbstractScrollArea::scrollContentsBy(dx, dy);
    updateItemList();
  }
 
 
  void TableViewContent::nullify() {
    m_parentView = NULL;
    m_model = NULL;
    m_items = NULL;
    m_activeCell = NULL;
    m_lastShiftArrowSelectedCell = NULL;
    m_editWidget = NULL;
    m_lastDirectlySelectedRow = NULL;
    m_lastShiftSelection = NULL;
    m_columns = NULL;
    rowsWithActiveColumnSelected = NULL;
    m_applyToSelectionAct = NULL;
    m_applyToAllAct = NULL;
    m_deleteSelectedRowsAct = NULL;
    m_editControlPointAct = NULL;
  }
 
 
  void TableViewContent::cellDataChanged(const TableColumn *col) {
    if (col->hasNetworkStructureEffect())
      emit rebuildModels(QList< AbstractTreeItem * >());
 
    emit modelDataChanged();
  }
 
 
  void TableViewContent::clearActiveCell() {
    m_activeCell->first = NULL;
    m_activeCell->second = -1;
  }
 
 
  void TableViewContent::clearColumnSelection() {
    m_lastShiftArrowSelectedCell->first = NULL;
    rowsWithActiveColumnSelected->clear();
  }
 
 
  void TableViewContent::copyCellSelection(bool allCells) {
    if (hasActiveCell()) {
      TableColumn *col = m_columns->getVisibleColumns()[m_activeCell->second];
 
      QString colTitle = col->getTitle();
 
      // Grab the active cell's data and copy it to the selected cells that are
      // in the same column as the active cell.
      QString cellData = m_activeCell->first->getFormattedData(colTitle);
 
      QList< AbstractTreeItem * > selection = allCells ? m_model->getItems(
          0, m_model->getVisibleRowCount()) : *rowsWithActiveColumnSelected;
 
      bool needsDialog = true;
      bool done = false;
      for (int i = 0; !done && i < selection.size(); i++) {
        AbstractTreeItem *row = selection[i];
        bool changeData = true;
 
        QString warningText =
          m_model->getWarningMessage(row, col, cellData);
        if (needsDialog && warningText.size()) {
          QMessageBox::StandardButton status = QMessageBox::warning(
              this, "Change cells?", warningText, QMessageBox::Yes |
              QMessageBox::No | QMessageBox::YesToAll | QMessageBox::NoToAll);
 
          switch (status) {
            case QMessageBox::YesToAll:
              needsDialog = false;
              break;
            case QMessageBox::NoToAll:
              done = true;
            case QMessageBox::No:
              changeData = false;
            default:
              ;
          }
        }
 
        if (changeData)
          row->setData(colTitle, cellData);
      }
 
      viewport()->update();
      cellDataChanged(col);
    }
  }
 
 
  void TableViewContent::createActions() {
    m_applyToSelectionAct = new QAction(tr("Copy to selected cells"), this);
    m_applyToSelectionAct->setStatusTip(tr("Copy the contents of this cell to the"
        "selected cells"));
    connect(m_applyToSelectionAct, SIGNAL(triggered()),
        this, SLOT(copySelection()));
 
    m_applyToAllAct = new QAction(tr("Copy to all cells"), this);
    m_applyToAllAct->setStatusTip(tr("Copy the contents of this cell to all"
        "cells in the current column"));
    connect(m_applyToAllAct, SIGNAL(triggered()),
        this, SLOT(copyAll()));
 
    m_deleteSelectedRowsAct = new QAction(tr("Delete selected rows"), this);
    m_deleteSelectedRowsAct->setStatusTip(
      tr("Delete the currently selected rows"));
    connect(m_deleteSelectedRowsAct, SIGNAL(triggered()),
        this, SLOT(deleteSelectedRows()));
 
    m_editControlPointAct = new QAction(tr("Edit selected control point"), this);
    m_editControlPointAct->setStatusTip(
      tr("Edit the selected control point or the parent control point of control measure"));
    connect(m_editControlPointAct, SIGNAL(triggered()),
        this, SLOT(editControlPoint()));
  }
 
 
  int TableViewContent::getColumnFromScreenX(int screenX) const {
 
    for (int i = 0; i < m_columns->getVisibleColumns().size(); i++) {
      QPair<int, int> cellXRange(m_columns->getVisibleXRange(i));
      int deltaX = -horizontalScrollBar()->value();
 
      if (cellXRange.first + deltaX < screenX &&
          cellXRange.second  + deltaX > screenX) {
        return i;
      }
    }
 
    return -1;
  }
 
 
  int TableViewContent::getRowFromScreenY(int screenY) const {
    int calculatedRowNum = screenY / m_rowHeight;
 
    if (calculatedRowNum >= 0 && calculatedRowNum < m_items->size() &&
        screenY >= 0 && screenY <= viewport()->height())
      return calculatedRowNum;
 
    return -1;
  }
 
 
  bool TableViewContent::hasActiveCell() const {
    return (m_activeCell->first && m_activeCell->second >= 0);
  }
 
 
  bool TableViewContent::hasRowSelection() const {
    return (m_model->getSelectedItems().size());
  }
 
 
  bool TableViewContent::mouseInCellSelection(QPoint mousePos) const {
    int colNum = getColumnFromScreenX(mousePos.x());
    AbstractTreeItem *row = m_items->at(getRowFromScreenY(mousePos.y()));
 
    return (rowsWithActiveColumnSelected->contains(row) &&
        m_activeCell->second == colNum);
  }
 
 
  bool TableViewContent::mouseInRowSelection(QPoint mousePos) const {
    AbstractTreeItem *row = m_items->at(getRowFromScreenY(mousePos.y()));
 
    return (m_model->getSelectedItems().contains(row));
  }
 
 
  bool TableViewContent::rowIsValid(int rowNum) const {
    bool valid = false;
 
    if (rowNum >= 0 && rowNum < m_items->size())
      valid = true;
 
    return valid;
  }
 
 
  bool TableViewContent::columnIsValid(int colNum) const {
    bool valid = false;
 
    if (colNum >= 0 && colNum < m_columns->getVisibleColumns().size())
      valid = true;
 
    return valid;
  }
 
 
  bool TableViewContent::cellIsEditable(int rowNum, int colNum) const {
 
    bool editable = false;
 
    QString colName = m_columns->getVisibleColumns()[colNum]->getTitle();
    if (m_items->at(rowNum)->isSelectable() &&
        m_items->at(rowNum)->isDataEditable(colName) &&
        !m_columns->getVisibleColumns()[colNum]->isReadOnly())
      editable = true;
 
    return editable;
  }
 
 
  bool TableViewContent::isDataColumn(int colNum) const {
    //TODO: Figure out what this does and if we can do it in a less confusing and roundabout way
    return m_columns->getVisibleColumns()[colNum]->getTitle().size();
  }
 
 
  void TableViewContent::paintRow(QPainter *painter, int rowNum,
      QPoint absolutePosition, QPoint relativePosition) {
 
    QPoint point(-absolutePosition.x(), relativePosition.y());
 
    AbstractTreeItem *item = (*m_items)[rowNum];
 
    // should always be true, but prevents segfault in case of bug
    if (item) {
      QPen originalPen = painter->pen();
 
      QPoint textPoint(point.x() + ITEM_INDENTATION,
          point.y() + ITEM_PADDING / 2);
 
      // finally draw the text
      int textHeight = m_rowHeight - ITEM_PADDING;
 
      QFontMetrics metrics(font());
 
      QPen gridPen(Qt::gray);
 
      TableColumnList visibleCols = m_columns->getVisibleColumns();
      for (int i = 0; i < visibleCols.size(); i++) {
        // draw text
        QPair<int, int> cellXRange(visibleCols.getVisibleXRange(i));
        QRect cellRect(cellXRange.first, point.y(),
            cellXRange.second - cellXRange.first, m_rowHeight);
        cellRect.moveLeft(cellRect.left() - horizontalScrollBar()->value() - 1);
 
        QString columnTitle = visibleCols[i]->getTitle();
        QRect textRect(textPoint, QSize(cellRect.right() - textPoint.x(),
            textHeight));
        QString text;
        bool textCentered = false;
        if (!columnTitle.isEmpty()) {
          text = item->getFormattedData(columnTitle);
 
          if (rowsWithActiveColumnSelected->indexOf(item) != -1 &&
              m_activeCell->second == i) {
            // This cell is selected, so render it as such.
            if (m_activeCell->first != item) {
              painter->fillRect(cellRect,
                  QBrush(palette().highlight().color()));
              painter->setPen(palette().highlightedText().color());
            }
            else {
              painter->setPen(palette().text().color());
            }
          }
          else {
            if (item->isSelected()) {
              painter->setPen(palette().highlightedText().color());
            }
            else {
              // If the current column is not editable (i.e. read-only), or it
              // is locked (think edit-locked control point or measure), then
              // it should be grayed out.
              //
              // NOTE: The following two lines provide for graying out of edit
              // locked data. This is commented out because this functionality
              // is not fully working yet.
              //if (!cellIsEditable(rowNum, i) ||
              //    item->isDataLocked(columnTitle))
              if (!cellIsEditable(rowNum, i)) {
                painter->setPen(palette().color(QPalette::Disabled,
                    QPalette::Text));
              }
              else {
                painter->setPen(palette().text().color());
              }
            }
          }
        }
        else {
          // Draw the row number.
          text = QString::number(rowNum + verticalScrollBar()->value() + 1);
          textCentered = true;
 
          // We need to paint the row number column.
          int x = cellRect.center().x();
          QLinearGradient gradient(x, cellRect.top(), x, cellRect.bottom());
 
          bool selected = item->isSelected();
          QColor color = selected ? palette().highlight().color() :
              palette().button().color();
 
          int adjustment = 110;
          gradient.setColorAt(0, color.lighter(adjustment));
          gradient.setColorAt(1, color.darker(adjustment));
          painter->fillRect(cellRect, gradient);
          if (selected)
            painter->setPen(palette().highlightedText().color());
          else
            painter->setPen(palette().text().color());
        }
 
        int flags = Qt::TextDontClip;
        if (textCentered)
          flags |= Qt::AlignCenter;
 
        // TODO this shouldn't be here... an item should be able to tell
        // whether or not it should be bolded.
        QFont normalFont = painter->font();
 
        if (item->getPointerType() == AbstractTreeItem::Measure) {
          ControlMeasure *cm = (ControlMeasure *) item->getPointer();
          if (cm && cm->Parent() && cm->Parent()->GetRefMeasure() == cm) {
            QFont boldFont(normalFont);
            boldFont.setBold(true);
            painter->setFont(boldFont);
          }
        }
 
        painter->drawText(textRect, flags,
            metrics.elidedText(text, Qt::ElideRight,
                textRect.width() - ITEM_INDENTATION));
        painter->setFont(normalFont);
 
        textPoint.setX(cellRect.right() + ITEM_INDENTATION);
        painter->setPen(originalPen);
 
        painter->setPen(gridPen);
        painter->drawLine(QPoint(cellRect.right(), point.y()),
            QPoint(cellRect.right(), point.y() + m_rowHeight));
        painter->setPen(originalPen);
      }
 
      int left = -horizontalScrollBar()->value() - 1;
      int right = m_columns->getVisibleWidth();
 
      gridPen.setWidth(2);
      painter->setPen(gridPen);
      painter->drawLine(QPoint(left, point.y() + m_rowHeight),
          QPoint(right, point.y() + m_rowHeight));
      painter->setPen(originalPen);
    }
  }
 
 
  void TableViewContent::updateActiveCell(QPoint screenPos) {
    if (m_editWidget && m_activeCell->first && m_activeCell->second >= 0) {
      try {
        const TableColumn *col =
          m_columns->getVisibleColumns()[m_activeCell->second];
        m_model->getDelegate()->saveData(m_editWidget, m_activeCell->first,
            col);
 
        cellDataChanged(col);
      }
      catch (IException &e) {
        QMessageBox::critical(this, "Failed to Set Data", e.what());
      }
    }
 
    int rowNum = getRowFromScreenY(screenPos.y());
    int oldActiveColumn = m_activeCell->second;
 
    clearActiveCell();
 
    if (rowNum >= 0) {
      AbstractTreeItem *item = (*m_items)[rowNum];
 
      TableColumnList visibleCols = m_columns->getVisibleColumns();
      for (int i = 0; i < visibleCols.size(); i++) {
        QPair<int, int> cellXRange(m_columns->getVisibleXRange(i));
        QRect cellRect(cellXRange.first, m_rowHeight * rowNum,
            cellXRange.second - cellXRange.first, m_rowHeight);
 
        cellRect.moveLeft(cellRect.left() - horizontalScrollBar()->value());
 
        if (cellRect.contains(screenPos) &&
            (oldActiveColumn != -1 || !visibleCols[i]->getTitle().isEmpty())) {
          m_activeCell->first = item;
          m_activeCell->second = i;
        }
      }
    }
 
    if (oldActiveColumn != m_activeCell->second) {
      clearColumnSelection();
      m_lastDirectlySelectedRow = NULL;
    }
 
    clearColumnSelection();
  }
 
 
  void TableViewContent::updateColumnGroupSelection(AbstractTreeItem *item) {
    // delete current row selection
    foreach (AbstractTreeItem * row, *m_lastShiftSelection) {
      if (rowsWithActiveColumnSelected->indexOf(row) != -1)
        rowsWithActiveColumnSelected->removeOne(row);
    }
 
 
    if (m_lastDirectlySelectedRow) {
      *m_lastShiftSelection = m_model->getItems(
          m_lastDirectlySelectedRow, item);
    }
    else {
      m_lastShiftSelection->clear();
    }
 
    foreach (AbstractTreeItem * row, *m_lastShiftSelection) {
      if (rowsWithActiveColumnSelected->indexOf(row) == -1)
        rowsWithActiveColumnSelected->append(row);
    }
  }
 
 
  QList< AbstractTreeItem * > TableViewContent::updateRowGroupSelection(int lastRow) {
    foreach (AbstractTreeItem * row, *m_lastShiftSelection) {
      if (row->getPointerType() == AbstractTreeItem::Point)
        foreach (AbstractTreeItem * child, row->getChildren())
        child->setSelected(false);
 
      if (row->getPointerType() == AbstractTreeItem::Measure)
        row->parent()->setSelected(false);
 
      row->setSelected(false);
    }
 
    if (m_lastDirectlySelectedRow) {
      *m_lastShiftSelection = m_model->getItems(
          m_lastDirectlySelectedRow, m_items->at(lastRow));
    }
    else {
      m_lastShiftSelection->clear();
    }
 
    QList< AbstractTreeItem * > newlySelectedItems;
    foreach (AbstractTreeItem * row, *m_lastShiftSelection) {
      row->setSelected(true);
 
      if (row->getPointerType() == AbstractTreeItem::Measure)
        row->parent()->setSelected(true);
 
      newlySelectedItems.append(row);
    }
 
    return newlySelectedItems;
  }
 
 
  void TableViewContent::copySelection() {
    copyCellSelection(false);
  }
 
 
  void TableViewContent::copyAll() {
    copyCellSelection(true);
  }
 
 
  void TableViewContent::deleteSelectedRows() {
    // Prompt the user for confirmation before deletion.
    QMessageBox::StandardButton status = QMessageBox::warning(
        this, "Delete row(s)?", "Delete selected row(s)?",
        QMessageBox::Yes | QMessageBox::No);
 
    if (status == QMessageBox::Yes) {
      // TODO should we store off the selected rows for efficiency?
      QList<AbstractTreeItem *> selectedRows = m_model->getSelectedItems();
 
      emit rebuildModels(selectedRows);
      emit modelDataChanged();
 
      m_lastShiftSelection->clear();
    }
  }
 
 
  void TableViewContent::editControlPoint() {
 
    ControlPoint *cp;
    QString serialNumber;
    AbstractTreeItem *item;
 
    //  A single cell is chosen
    if (m_model->getSelectedItems().count() == 0) {
      item = m_activeCell->first;
    }
    // A row is chosen
    else {
      item = m_lastDirectlySelectedRow;
    }
 
    //  Item chosen from the Point table view
    if (item->getPointerType() == AbstractTreeItem::Point) {
      cp = (ControlPoint *) (item->getPointer());
    }
    //  Item chosen from the Measure table view
    else {
      cp = (ControlPoint *) (item->parent()->getPointer());
      serialNumber = item->getData("Image ID").toString();
    }
 
//    qDebug()<<"activeCell cpid = "<<cp->GetId()<<"  sn = "<<serialNumber;
 
    emit editControlPoint(cp, serialNumber);
  }
 
 
  void TableViewContent::updateItemList() {
 
    if (m_model) {
      int startRow = verticalScrollBar()->value();
      int rowCount = (int) ceil(viewport()->height() / (double) m_rowHeight);
      m_items->clear();
      foreach (AbstractTreeItem * item,
          m_model->getItems(startRow, startRow + rowCount)) {
        m_items->append(item);
      }
 
      viewport()->update();
    }
  }
 
 
  void TableViewContent::showContextMenu(QPoint mouseLocation) {
    QMenu contextMenu(this);
 
    // Only add this action if a single row is selected or a cell is selected
    // TODO: 2017-05-17 TLS
    // Always allow editing of point.  Should we check for editLock??
    QList<AbstractTreeItem *> selectedRows = m_model->getSelectedItems();
 
 
    // If there is a row selection, show a context menu if the user clicked
    // anywhere on any of the selected row(s).
 
    if (QApplication::applicationName() != "cneteditor") {
      if (m_activeControlNet) {
        m_editControlPointAct->setEnabled(true);
        m_applyToSelectionAct->setEnabled(true);
        m_applyToAllAct->setEnabled(true);
      }
      else {
        m_editControlPointAct->setEnabled(false);
        m_applyToSelectionAct->setEnabled(false);
        m_applyToAllAct->setEnabled(false);
      }
 
      // We want to be able to delete rows in a nonactive control.
      m_deleteSelectedRowsAct->setEnabled(true);
 
      if (hasActiveCell() && selectedRows.count() <= 1) {
        contextMenu.addAction(m_editControlPointAct);
      }
      if (hasRowSelection() && mouseInRowSelection(mouseLocation)) {
        contextMenu.addAction(m_deleteSelectedRowsAct);
      }
 
      // Only show the context menu for cells if the user right-clicked on the
      // active cell.
      if (hasActiveCell() && mouseInCellSelection(mouseLocation)) {
        if (rowsWithActiveColumnSelected->size() > 1) {
          contextMenu.addAction(m_applyToSelectionAct);
        }
 
        contextMenu.addAction(m_applyToAllAct);
      }
    }
    else {
      if (hasRowSelection() && mouseInRowSelection(mouseLocation)) {
        contextMenu.addAction(m_deleteSelectedRowsAct);
      }
 
      // Only show the context menu for cells if the user right-clicked on the
      // active cell.
      if (hasActiveCell() && mouseInCellSelection(mouseLocation)) {
        if (rowsWithActiveColumnSelected->size() > 1) {
          contextMenu.addAction(m_applyToSelectionAct);
        }
 
        contextMenu.addAction(m_applyToAllAct);
      }
    }
    contextMenu.exec(mapToGlobal(mouseLocation));
  }
}