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#include <QtGui>

#include "freezetablewidget.h"

//! [constructor]

FreezeTableWidget::FreezeTableWidget(QAbstractItemModel * model)

{

      setModel(model);

      frozenTableView = new QTableView(this);

      init();

      //connect the headers and scrollbars of both tableviews together

      connect(horizontalHeader(),SIGNAL(sectionResized(int,int,int)), this,

              SLOT(updateSectionWidth(int,int,int)));

      connect(verticalHeader(),SIGNAL(sectionResized(int,int,int)), this,

              SLOT(updateSectionHeight(int,int,int)));

      connect(frozenTableView->verticalScrollBar(), SIGNAL(valueChanged(int)),

              verticalScrollBar(), SLOT(setValue(int)));

      connect(verticalScrollBar(), SIGNAL(valueChanged(int)),

              frozenTableView->verticalScrollBar(), SLOT(setValue(int)));

}

//! [constructor]

FreezeTableWidget::~FreezeTableWidget()

{

      delete frozenTableView;

}

//! [init part1]

void FreezeTableWidget::init()

{

      frozenTableView->setModel(model());

      frozenTableView->setFocusPolicy(Qt::NoFocus);

      frozenTableView->verticalHeader()->hide();

      frozenTableView->horizontalHeader()->setResizeMode(QHeaderView::Fixed);

      viewport()->stackUnder(frozenTableView);

//! [init part1]

//! [init part2]

      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);

}

//! [init part2]

//! [sections]

void FreezeTableWidget::updateSectionWidth(int logicalIndex, int, int newSize)

{

      if(logicalIndex==0){

            frozenTableView->setColumnWidth(0,newSize);

            updateFrozenTableGeometry();

      }

}

void FreezeTableWidget::updateSectionHeight(int logicalIndex, int, int newSize)

{

      frozenTableView->setRowHeight(logicalIndex, newSize);

}

//! [sections]

//! [resize]

void FreezeTableWidget::resizeEvent(QResizeEvent * event)

{

      QTableView::resizeEvent(event);

      updateFrozenTableGeometry();

 }

//! [resize]

//! [navigate]

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;

}

//! [navigate]

void FreezeTableWidget::scrollTo (const QModelIndex & index, ScrollHint hint){

    if(index.column()>0)

        QTableView::scrollTo(index, hint);

}

//! [geometry]

void FreezeTableWidget::updateFrozenTableGeometry()

{

      frozenTableView->setGeometry( verticalHeader()->width()+frameWidth(),

                                    frameWidth(), columnWidth(0),

                                    viewport()->height()+horizontalHeader()->height());

}

//! [geometry]