main.cpp Example File
demos/spreadsheet/main.cpp
/****************************************************************************
**
** Copyright (C) 2004-2005 Trolltech AS. All rights reserved.
**
** This file is part of the documentation of the Qt Toolkit.
**
** This file may be used under the terms of the GNU General Public
** License version 2.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of
** this file. Please review the following information to ensure GNU
** General Public Licensing requirements will be met:
** http://www.trolltech.com/products/qt/opensource.html
**
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http://www.trolltech.com/products/qt/licensing.html or contact the
** sales department at sales@trolltech.com.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
****************************************************************************/
#include <QtGui>
static QString encode_pos(int row, int col) {
return QString(col + 'A') + QString(row + '0');
}
static void decode_pos(const QString &pos, int *row, int *col)
{
*col = pos.at(0).toLatin1() - 'A';
*row = pos.at(1).toLatin1() - '0';
}
class SpreadSheetItem : public QTableWidgetItem
{
public:
SpreadSheetItem();
SpreadSheetItem(const QString &text);
QTableWidgetItem *clone() const;
QVariant data(int role) const;
void setData(int role, const QVariant &value);
QVariant display() const;
inline QString formula() const
{ return QTableWidgetItem::data(Qt::DisplayRole).toString(); }
QPoint convertCoords(const QString coords) const;
private:
mutable bool isResolving;
};
SpreadSheetItem::SpreadSheetItem()
: QTableWidgetItem(), isResolving(false) {}
SpreadSheetItem::SpreadSheetItem(const QString &text)
: QTableWidgetItem(text), isResolving(false) {}
QTableWidgetItem *SpreadSheetItem::clone() const
{
SpreadSheetItem *item = new SpreadSheetItem();
*item = *this;
return item;
}
QVariant SpreadSheetItem::data(int role) const
{
if (role == Qt::EditRole || role == Qt::StatusTipRole)
return formula();
if (role == Qt::DisplayRole)
return display();
QString t = display().toString();
bool isNumber = false;
int number = t.toInt(&isNumber);
if (role == Qt::TextColorRole) {
if (!isNumber)
return qVariantFromValue(QColor(Qt::black));
else if (number < 0)
return qVariantFromValue(QColor(Qt::red));
return qVariantFromValue(QColor(Qt::blue));
}
if (role == Qt::TextAlignmentRole)
if (!t.isEmpty() && (t.at(0).isNumber() || t.at(0) == '-'))
return (int)(Qt::AlignRight | Qt::AlignVCenter);
return QTableWidgetItem::data(role);
}
void SpreadSheetItem::setData(int role, const QVariant &value)
{
QTableWidgetItem::setData(role, value);
if (tableWidget())
tableWidget()->viewport()->update();
}
QVariant SpreadSheetItem::display() const
{
// check if the string is actially a formula or not
QString formula = this->formula();
QStringList list = formula.split(' ');
if (list.count() != 3)
return formula; // its a normal string
QString op = list.at(0).toLower();
QPoint one = convertCoords(list.at(1));
QPoint two = convertCoords(list.at(2));
const QTableWidgetItem *start = tableWidget()->item(one.y(), one.x());
QTableWidgetItem *end = tableWidget()->item(two.y(), two.x());
if (!start || !end)
return "Error: Item does not exist!";
// avoid circular dependencies
if (isResolving)
return QVariant();
isResolving = true;
QVariant result;
if (op == "sum") {
int sum = 0;
for (int r = tableWidget()->row(start); r <= tableWidget()->row(end); ++r) {
for (int c = tableWidget()->column(start); c <= tableWidget()->column(end); ++c) {
const QTableWidgetItem *tableItem = tableWidget()->item(r, c);
if (tableItem && tableItem != this)
sum += tableItem->text().toInt();
}
}
result = sum;
} else if (op == "+") {
result = (start->text().toInt() + end->text().toInt());
} else if (op == "-") {
result = (start->text().toInt() - end->text().toInt());
} else if (op == "*") {
result = (start->text().toInt() * end->text().toInt());
} else if (op == "/") {
if (end->text().toInt() == 0)
result = QString("nan");
else
result = (start->text().toInt() / end->text().toInt());
} else {
result = "Error: Operation does not exist!";
}
isResolving = false;
return result;
}
QPoint SpreadSheetItem::convertCoords(const QString coords) const
{
int r = 0;
int c = coords.at(0).toUpper().toAscii() - 'A';
for (int i = 1; i < coords.count(); ++i) {
r *= 10;
r += coords.at(i).digitValue();
}
return QPoint(c, r);
}
class SpreadSheet : public QMainWindow
{
Q_OBJECT
public:
SpreadSheet(int rows, int cols, QWidget *parent = 0);
public slots:
void updateStatus(QTableWidgetItem *item);
void updateColor(QTableWidgetItem *item);
void updateLineEdit(QTableWidgetItem *item);
void returnPressed();
void selectColor();
void selectFont();
void clear();
void showAbout();
void actionSum();
void actionSubtract();
void actionAdd();
void actionMultiply();
void actionDivide();
protected:
void setupContextMenu();
void setupContents();
void setupMenuBar();
void createActions();
void actionMath_helper(const QString &title, const QString &op);
bool runInputDialog(const QString &title,
const QString &c1Text,
const QString &c2Text,
const QString &opText,
const QString &outText,
QString *cell1, QString *cell2, QString *outCell);
private:
QToolBar *toolBar;
QAction *colorAction;
QAction *fontAction;
QAction *firstSeparator;
QAction *cell_sumAction;
QAction *cell_addAction;
QAction *cell_subAction;
QAction *cell_mulAction;
QAction *cell_divAction;
QAction *secondSeparator;
QAction *clearAction;
QAction *aboutSpreadSheet;
QAction *exitAction;
QLabel *cellLabel;
QTableWidget *table;
QLineEdit *formulaInput;
};
SpreadSheet::SpreadSheet(int rows, int cols, QWidget *parent)
: QMainWindow(parent)
{
addToolBar(toolBar = new QToolBar());
formulaInput = new QLineEdit();
cellLabel = new QLabel(toolBar);
cellLabel->setMinimumSize(80, 0);
toolBar->addWidget(cellLabel);
toolBar->addWidget(formulaInput);
table = new QTableWidget(rows, cols, this);
for (int c = 0; c < cols; ++c) {
QString character(QChar('A' + c));
table->setHorizontalHeaderItem(c, new QTableWidgetItem(character));
}
table->setItemPrototype(table->item(rows - 1, cols - 1));
createActions();
updateColor(0);
setupMenuBar();
setupContextMenu();
setupContents();
setCentralWidget(table);
statusBar();
connect(table, SIGNAL(currentItemChanged(QTableWidgetItem*, QTableWidgetItem*)),
this, SLOT(updateStatus(QTableWidgetItem*)));
connect(table, SIGNAL(currentItemChanged(QTableWidgetItem*, QTableWidgetItem*)),
this, SLOT(updateColor(QTableWidgetItem*)));
connect(table, SIGNAL(currentItemChanged(QTableWidgetItem*, QTableWidgetItem*)),
this, SLOT(updateLineEdit(QTableWidgetItem*)));
connect(table, SIGNAL(itemChanged(QTableWidgetItem*)),
this, SLOT(updateStatus(QTableWidgetItem*)));
connect(formulaInput, SIGNAL(returnPressed()), this, SLOT(returnPressed()));
connect(table, SIGNAL(itemChanged(QTableWidgetItem*)),
this, SLOT(updateLineEdit(QTableWidgetItem*)));
setWindowTitle(tr("Spreadsheet"));
}
void SpreadSheet::createActions()
{
cell_sumAction = new QAction(tr("Sum"), this);
connect(cell_sumAction, SIGNAL(triggered()), this, SLOT(actionSum()));
cell_addAction = new QAction(tr("&Add"), this);
cell_addAction->setShortcut(Qt::CTRL | Qt::Key_Plus);
connect(cell_addAction, SIGNAL(triggered()), this, SLOT(actionAdd()));
cell_subAction = new QAction(tr("&Subtract"), this);
cell_subAction->setShortcut(Qt::CTRL | Qt::Key_Minus);
connect(cell_subAction, SIGNAL(triggered()), this, SLOT(actionSubtract()));
cell_mulAction = new QAction(tr("&Multiply"), this);
cell_mulAction->setShortcut(Qt::CTRL | Qt::Key_multiply);
connect(cell_mulAction, SIGNAL(triggered()), this, SLOT(actionMultiply()));
cell_divAction = new QAction(tr("&Divide"), this);
cell_divAction->setShortcut(Qt::CTRL | Qt::Key_division);
connect(cell_divAction, SIGNAL(triggered()), this, SLOT(actionDivide()));
fontAction = new QAction(tr("Font..."), this);
fontAction->setShortcut(Qt::CTRL|Qt::Key_F);
connect(fontAction, SIGNAL(triggered()), this, SLOT(selectFont()));
colorAction = new QAction(QPixmap(16, 16), tr("Background &Color..."), this);
connect(colorAction, SIGNAL(triggered()), this, SLOT(selectColor()));
clearAction = new QAction(tr("Clear"), this);
clearAction->setShortcut(Qt::Key_Delete);
connect(clearAction, SIGNAL(triggered()), this, SLOT(clear()));
aboutSpreadSheet = new QAction(tr("About SpreadSheet"), this);
connect(aboutSpreadSheet, SIGNAL(triggered()), this, SLOT(showAbout()));
exitAction = new QAction(tr("E&xit"), this);
connect(exitAction, SIGNAL(triggered()), qApp, SLOT(quit()));
firstSeparator = new QAction(this);
firstSeparator->setSeparator(true);
secondSeparator = new QAction(this);
secondSeparator->setSeparator(true);
}
void SpreadSheet::setupMenuBar()
{
QMenu *fileMenu = menuBar()->addMenu(tr("&File"));
fileMenu->addAction(exitAction);
QMenu *cellMenu = menuBar()->addMenu(tr("&Cell"));
cellMenu->addAction(cell_addAction);
cellMenu->addAction(cell_subAction);
cellMenu->addAction(cell_mulAction);
cellMenu->addAction(cell_divAction);
cellMenu->addAction(cell_sumAction);
cellMenu->addSeparator();
cellMenu->addAction(colorAction);
cellMenu->addAction(fontAction);
menuBar()->addSeparator();
QMenu *aboutMenu = menuBar()->addMenu(tr("&Help"));
aboutMenu->addAction(aboutSpreadSheet);
}
void SpreadSheet::updateStatus(QTableWidgetItem *item)
{
if (item && item == table->currentItem()) {
statusBar()->showMessage(item->data(Qt::StatusTipRole).toString(), 1000);
cellLabel->setText("Cell: (" + encode_pos(table->row(item), table->column(item)) + ")");
}
}
void SpreadSheet::updateColor(QTableWidgetItem *item)
{
QPixmap pix(16, 16);
QColor col;
if (item)
col = item->backgroundColor();
if (!col.isValid())
col = palette().base().color();
QPainter pt(&pix);
pt.fillRect(0, 0, 16, 16, col);
QColor lighter = col.light();
pt.setPen(lighter);
QPoint lightFrame[] = { QPoint(0, 15), QPoint(0, 0), QPoint(15, 0) };
pt.drawPolyline(lightFrame, 3);
pt.setPen(col.dark());
QPoint darkFrame[] = { QPoint(1, 15), QPoint(15, 15), QPoint(15, 1) };
pt.drawPolyline(darkFrame, 3);
pt.end();
colorAction->setIcon(pix);
}
void SpreadSheet::updateLineEdit(QTableWidgetItem *item)
{
if (item != table->currentItem())
return;
if (item)
formulaInput->setText(item->data(Qt::EditRole).toString());
else
formulaInput->clear();
}
void SpreadSheet::returnPressed()
{
QString text = formulaInput->text();
int row = table->currentRow();
int col = table->currentColumn();
QTableWidgetItem *item = table->item(row, col);
if (!item)
table->setItem(row, col, new SpreadSheetItem(text));
else
item->setData(Qt::EditRole, text);
table->viewport()->update();
}
void SpreadSheet::selectColor()
{
QTableWidgetItem *item = table->currentItem();
QColor col = item ? item->backgroundColor() : table->palette().base().color();
col = QColorDialog::getColor(col, this);
if (!col.isValid())
return;
QList<QTableWidgetItem*> selected = table->selectedItems();
if (selected.count() == 0)
return;
foreach(QTableWidgetItem *i, selected)
if (i) i->setBackgroundColor(col);
updateColor(table->currentItem());
}
void SpreadSheet::selectFont()
{
QList<QTableWidgetItem*> selected = table->selectedItems();
if (selected.count() == 0)
return;
bool ok = false;
QFont fnt = QFontDialog::getFont(&ok, font(), this);
if (!ok)
return;
foreach(QTableWidgetItem *i, selected)
if (i) i->setFont(fnt);
}
bool SpreadSheet::runInputDialog(const QString &title,
const QString &c1Text,
const QString &c2Text,
const QString &opText,
const QString &outText,
QString *cell1, QString *cell2, QString *outCell)
{
const QStringList rows = QStringList() << "0" << "1" << "2" << "3" << "4"
<< "5" << "6" << "7" << "8" << "9";
const QStringList cols = QStringList() << "A" << "B" << "C" << "D" << "E" << "F";
QDialog addDialog(this);
addDialog.setWindowTitle(title);
QGroupBox group(title, &addDialog);
group.setMinimumSize(250, 100);
QLabel cell1Label(c1Text, &group);
QComboBox cell1RowInput(&group);
cell1RowInput.addItems(rows);
cell1RowInput.setCurrentIndex(cell1->at(1).toLatin1() - '0');
QComboBox cell1ColInput(&group);
cell1ColInput.addItems(cols);
cell1ColInput.setCurrentIndex(cell1->at(0).toLatin1() - 'A');
QLabel operatorLabel(opText, &group);
operatorLabel.setAlignment(Qt::AlignHCenter);
QLabel cell2Label(c2Text, &group);
QComboBox cell2RowInput(&group);
cell2RowInput.addItems(rows);
cell2RowInput.setCurrentIndex(cell2->at(1).toLatin1() - '0');
QComboBox cell2ColInput(&group);
cell2ColInput.addItems(cols);
cell2ColInput.setCurrentIndex(cell2->at(0).toLatin1() - 'A');
QLabel equalsLabel("=", &group);
equalsLabel.setAlignment(Qt::AlignHCenter);
QLabel outLabel(outText, &group);
QComboBox outRowInput(&group);
outRowInput.addItems(rows);
outRowInput.setCurrentIndex(outCell->at(1).toLatin1() - '0');
QComboBox outColInput(&group);
outColInput.addItems(cols);
outColInput.setCurrentIndex(outCell->at(0).toLatin1() - 'A');
QPushButton cancelButton(tr("Cancel"), &addDialog);
connect(&cancelButton, SIGNAL(clicked()), &addDialog, SLOT(reject()));
QPushButton okButton(tr("OK"), &addDialog);
okButton.setDefault(true);
connect(&okButton, SIGNAL(clicked()), &addDialog, SLOT(accept()));
QHBoxLayout *buttonsLayout = new QHBoxLayout;
buttonsLayout->addStretch(1);
buttonsLayout->addWidget(&okButton);
buttonsLayout->addSpacing(10);
buttonsLayout->addWidget(&cancelButton);
QVBoxLayout *dialogLayout = new QVBoxLayout(&addDialog);
dialogLayout->addWidget(&group);
dialogLayout->addStretch(1);
dialogLayout->addItem(buttonsLayout);
QHBoxLayout *cell1Layout = new QHBoxLayout;
cell1Layout->addWidget(&cell1Label);
cell1Layout->addSpacing(10);
cell1Layout->addWidget(&cell1ColInput);
cell1Layout->addSpacing(10);
cell1Layout->addWidget(&cell1RowInput);
QHBoxLayout *cell2Layout = new QHBoxLayout;
cell2Layout->addWidget(&cell2Label);
cell2Layout->addSpacing(10);
cell2Layout->addWidget(&cell2ColInput);
cell2Layout->addSpacing(10);
cell2Layout->addWidget(&cell2RowInput);
QHBoxLayout *outLayout = new QHBoxLayout;
outLayout->addWidget(&outLabel);
outLayout->addSpacing(10);
outLayout->addWidget(&outColInput);
outLayout->addSpacing(10);
outLayout->addWidget(&outRowInput);
QVBoxLayout *vLayout = new QVBoxLayout(&group);
vLayout->addItem(cell1Layout);
vLayout->addWidget(&operatorLabel);
vLayout->addItem(cell2Layout);
vLayout->addWidget(&equalsLabel);
vLayout->addStretch(1);
vLayout->addItem(outLayout);
if (addDialog.exec()) {
*cell1 = cell1ColInput.currentText() + cell1RowInput.currentText();
*cell2 = cell2ColInput.currentText() + cell2RowInput.currentText();
*outCell = outColInput.currentText() + outRowInput.currentText();
return true;
}
return false;
}
void SpreadSheet::actionSum()
{
int row_first = 0;
int row_last = 0;
int row_cur = 0;
int col_first = 0;
int col_last = 0;
int col_cur = 0;
QList<QTableWidgetItem*> selected = table->selectedItems();
if (!selected.isEmpty()) {
QTableWidgetItem *first = selected.first();
QTableWidgetItem *last = selected.last();
row_first = table->row(first);
row_last = table->row(last);
col_first = table->column(first);
col_last = table->column(last);
}
QTableWidgetItem *current = table->currentItem();
if (current) {
row_cur = table->row(current);
col_cur = table->column(current);
}
QString cell1 = encode_pos(row_first, col_first);
QString cell2 = encode_pos(row_last, col_last);
QString out = encode_pos(row_cur, col_cur);
if (runInputDialog(tr("Sum cells"), tr("First cell:"), tr("Last cell:"),
QString("%1").arg(QChar(0x03a3)), tr("Output to:"),
&cell1, &cell2, &out)) {
int row, col;
decode_pos(out, &row, &col);
table->item(row, col)->setText("sum " + cell1 + " " + cell2);
}
}
void SpreadSheet::actionMath_helper(const QString &title, const QString &op)
{
QString cell1 = "B1";
QString cell2 = "B2";
QString out = "B3";
QTableWidgetItem *current = table->currentItem();
if (current) {
out = QString(table->currentColumn() + 'A') + QString(table->currentRow() + '0');
}
if (runInputDialog(title, tr("Cell 1"), tr("Cell 2"), op, tr("Output to:"),
&cell1, &cell2, &out)) {
int row, col;
decode_pos(out, &row, &col);
table->item(row, col)->setText(op + " " + cell1 + " " + cell2);
}
}
void SpreadSheet::actionAdd()
{
actionMath_helper(tr("Addition"), "+");
}
void SpreadSheet::actionSubtract()
{
actionMath_helper(tr("Subtraction"), "-");
}
void SpreadSheet::actionMultiply()
{
actionMath_helper(tr("Multiplication"), "*");
}
void SpreadSheet::actionDivide()
{
actionMath_helper(tr("Division"), "/");
}
void SpreadSheet::clear()
{
foreach (QTableWidgetItem *i, table->selectedItems())
i->setText("");
}
void SpreadSheet::setupContextMenu()
{
addAction(cell_addAction);
addAction(cell_subAction);
addAction(cell_mulAction);
addAction(cell_divAction);
addAction(cell_sumAction);
addAction(firstSeparator);
addAction(colorAction);
addAction(fontAction);
addAction(secondSeparator);
addAction(clearAction);
setContextMenuPolicy(Qt::ActionsContextMenu);
}
void SpreadSheet::setupContents()
{
QColor titleBackground(Qt::lightGray);
QFont titleFont = table->font();
titleFont.setBold(true);
// column 0
table->setItem(0, 0, new SpreadSheetItem("Item"));
table->item(0, 0)->setBackgroundColor(titleBackground);
table->item(0, 0)->setToolTip("This column shows the purchased item/service");
table->item(0, 0)->setFont(titleFont);
table->setItem(1, 0, new SpreadSheetItem("AirportBus"));
table->setItem(2, 0, new SpreadSheetItem("Flight (Munich)"));
table->setItem(3, 0, new SpreadSheetItem("Lunch"));
table->setItem(4, 0, new SpreadSheetItem("Flight (LA)"));
table->setItem(5, 0, new SpreadSheetItem("Taxi"));
table->setItem(6, 0, new SpreadSheetItem("Dinner"));
table->setItem(7, 0, new SpreadSheetItem("Hotel"));
table->setItem(8, 0, new SpreadSheetItem("Flight (Oslo)"));
table->setItem(9, 0, new SpreadSheetItem("Total:"));
table->item(9, 0)->setFont(titleFont);
table->item(9,0)->setBackgroundColor(Qt::lightGray);
// column 1
table->setItem(0, 1, new SpreadSheetItem("Price"));
table->item(0, 1)->setBackgroundColor(titleBackground);
table->item(0, 1)->setToolTip("This column shows the price of the purchase");
table->item(0, 1)->setFont(titleFont);
table->setItem(1, 1, new SpreadSheetItem("150"));
table->setItem(2, 1, new SpreadSheetItem("2350"));
table->setItem(3, 1, new SpreadSheetItem("-14"));
table->setItem(4, 1, new SpreadSheetItem("980"));
table->setItem(5, 1, new SpreadSheetItem("5"));
table->setItem(6, 1, new SpreadSheetItem("120"));
table->setItem(7, 1, new SpreadSheetItem("300"));
table->setItem(8, 1, new SpreadSheetItem("1240"));
table->setItem(9, 1, new SpreadSheetItem());
table->item(9,1)->setBackgroundColor(Qt::lightGray);
// column 2
table->setItem(0, 2, new SpreadSheetItem("Currency"));
table->item(0, 2)->setBackgroundColor(titleBackground);
table->item(0, 2)->setToolTip("This column shows the currency");
table->item(0, 2)->setFont(titleFont);
table->setItem(1, 2, new SpreadSheetItem("NOK"));
table->setItem(2, 2, new SpreadSheetItem("NOK"));
table->setItem(3, 2, new SpreadSheetItem("EUR"));
table->setItem(4, 2, new SpreadSheetItem("EUR"));
table->setItem(5, 2, new SpreadSheetItem("USD"));
table->setItem(6, 2, new SpreadSheetItem("USD"));
table->setItem(7, 2, new SpreadSheetItem("USD"));
table->setItem(8, 2, new SpreadSheetItem("USD"));
table->setItem(9, 2, new SpreadSheetItem());
table->item(9,2)->setBackgroundColor(Qt::lightGray);
// column 3
table->setItem(0, 3, new SpreadSheetItem("Ex.Rate"));
table->item(0, 3)->setBackgroundColor(titleBackground);
table->item(0, 3)->setToolTip("This column shows the exchange rate to NOK");
table->item(0, 3)->setFont(titleFont);
table->setItem(1, 3, new SpreadSheetItem("1"));
table->setItem(2, 3, new SpreadSheetItem("1"));
table->setItem(3, 3, new SpreadSheetItem("8"));
table->setItem(4, 3, new SpreadSheetItem("8"));
table->setItem(5, 3, new SpreadSheetItem("7"));
table->setItem(6, 3, new SpreadSheetItem("7"));
table->setItem(7, 3, new SpreadSheetItem("7"));
table->setItem(8, 3, new SpreadSheetItem("7"));
table->setItem(9, 3, new SpreadSheetItem());
table->item(9,3)->setBackgroundColor(Qt::lightGray);
// column 4
table->setItem(0, 4, new SpreadSheetItem("NOK"));
table->item(0, 4)->setBackgroundColor(titleBackground);
table->item(0, 4)->setToolTip("This column shows the expenses in NOK");
table->item(0, 4)->setFont(titleFont);
table->setItem(1, 4, new SpreadSheetItem("* B1 D1"));
table->setItem(2, 4, new SpreadSheetItem("* B2 D2"));
table->setItem(3, 4, new SpreadSheetItem("* B3 D3"));
table->setItem(4, 4, new SpreadSheetItem("* B4 D4"));
table->setItem(5, 4, new SpreadSheetItem("* B5 D5"));
table->setItem(6, 4, new SpreadSheetItem("* B6 D6"));
table->setItem(7, 4, new SpreadSheetItem("* B7 D7"));
table->setItem(8, 4, new SpreadSheetItem("* B8 D8"));
table->setItem(9, 4, new SpreadSheetItem("sum E2 E9"));
table->item(9,4)->setBackgroundColor(Qt::lightGray);
}
const char *htmlText =
"<HTML>"
"<p><b>This demo shows use of <c>QTableWidget</c> with custom handling for"
" individual cells.</b></p>"
"<p>Using a customized table item we make it possible to have dynamic"
" output in different cells. The content that is implemented for this"
" particular demo is:"
"<ul>"
"<li>Addition two cells.</li>"
"<li>Subtracting one cell from another.</li>"
"<li>Multiplying two cells.</li>"
"<li>Dividing one cell with another.</li>"
"<li>Summing the contents of an arbitrary number of cells.</li>"
"</HTML>";
void SpreadSheet::showAbout()
{
QMessageBox::about(this, "About Spread Sheet", htmlText);
}
int main(int argc, char** argv) {
Q_INIT_RESOURCE(spreadsheet);
QApplication app(argc, argv);
SpreadSheet sheet(10, 5);
sheet.setWindowIcon(QPixmap(":/images/interview.png"));
sheet.resize(600, 400);
sheet.show();
return app.exec();
}
#include "main.moc"
