spreadsheet.cpp Example File

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#include <QtWidgets> #if defined(QT_PRINTSUPPORT_LIB) #include <QtPrintSupport/qtprintsupportglobal.h> #if QT_CONFIG(printdialog) #include <QPrinter> #include <QPrintDialog> #endif #if QT_CONFIG(printpreviewdialog) #include <QPrintPreviewDialog> #endif #endif #include "spreadsheet.h" #include "spreadsheetdelegate.h" #include "spreadsheetitem.h" #include "printview.h" 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); table->setSizeAdjustPolicy(QTableWidget::AdjustToContents); 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)); table->setItemDelegate(new SpreadSheetDelegate()); createActions(); updateColor(0); setupMenuBar(); setupContents(); setupContextMenu(); setCentralWidget(table); statusBar(); connect(table, &QTableWidget::currentItemChanged, this, &SpreadSheet::updateStatus); connect(table, &QTableWidget::currentItemChanged, this, &SpreadSheet::updateColor); connect(table, &QTableWidget::currentItemChanged, this, &SpreadSheet::updateLineEdit); connect(table, &QTableWidget::itemChanged, this, &SpreadSheet::updateStatus); connect(formulaInput, &QLineEdit::returnPressed, this, &SpreadSheet::returnPressed); connect(table, &QTableWidget::itemChanged, this, &SpreadSheet::updateLineEdit); setWindowTitle(tr("Spreadsheet")); } void SpreadSheet::createActions() { cell_sumAction = new QAction(tr("Sum"), this); connect(cell_sumAction, &QAction::triggered, this, &SpreadSheet::actionSum); cell_addAction = new QAction(tr("&Add"), this); cell_addAction->setShortcut(Qt::CTRL | Qt::Key_Plus); connect(cell_addAction, &QAction::triggered, this, &SpreadSheet::actionAdd); cell_subAction = new QAction(tr("&Subtract"), this); cell_subAction->setShortcut(Qt::CTRL | Qt::Key_Minus); connect(cell_subAction, &QAction::triggered, this, &SpreadSheet::actionSubtract); cell_mulAction = new QAction(tr("&Multiply"), this); cell_mulAction->setShortcut(Qt::CTRL | Qt::Key_multiply); connect(cell_mulAction, &QAction::triggered, this, &SpreadSheet::actionMultiply); cell_divAction = new QAction(tr("&Divide"), this); cell_divAction->setShortcut(Qt::CTRL | Qt::Key_division); connect(cell_divAction, &QAction::triggered, this, &SpreadSheet::actionDivide); fontAction = new QAction(tr("Font..."), this); fontAction->setShortcut(Qt::CTRL | Qt::Key_F); connect(fontAction, &QAction::triggered, this, &SpreadSheet::selectFont); colorAction = new QAction(QPixmap(16, 16), tr("Background &Color..."), this); connect(colorAction, &QAction::triggered, this, &SpreadSheet::selectColor); clearAction = new QAction(tr("Clear"), this); clearAction->setShortcut(Qt::Key_Delete); connect(clearAction, &QAction::triggered, this, &SpreadSheet::clear); aboutSpreadSheet = new QAction(tr("About Spreadsheet"), this); connect(aboutSpreadSheet, &QAction::triggered, this, &SpreadSheet::showAbout); exitAction = new QAction(tr("E&xit"), this); connect(exitAction, &QAction::triggered, qApp, &QCoreApplication::quit); printAction = new QAction(tr("&Print"), this); connect(printAction, &QAction::triggered, this, &SpreadSheet::print); 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(printAction); 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(tr("Cell: (%1)").arg(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) { QStringList rows, cols; for (int c = 0; c < table->columnCount(); ++c) cols << QChar('A' + c); for (int r = 0; r < table->rowCount(); ++r) rows << QString::number(1 + r); QDialog addDialog(this); addDialog.setWindowTitle(title); QGroupBox group(title, &addDialog); group.setMinimumSize(250, 100); QLabel cell1Label(c1Text, &group); QComboBox cell1RowInput(&group); int c1Row, c1Col; decode_pos(*cell1, &c1Row, &c1Col); cell1RowInput.addItems(rows); cell1RowInput.setCurrentIndex(c1Row); QComboBox cell1ColInput(&group); cell1ColInput.addItems(cols); cell1ColInput.setCurrentIndex(c1Col); QLabel operatorLabel(opText, &group); operatorLabel.setAlignment(Qt::AlignHCenter); QLabel cell2Label(c2Text, &group); QComboBox cell2RowInput(&group); int c2Row, c2Col; decode_pos(*cell2, &c2Row, &c2Col); cell2RowInput.addItems(rows); cell2RowInput.setCurrentIndex(c2Row); QComboBox cell2ColInput(&group); cell2ColInput.addItems(cols); cell2ColInput.setCurrentIndex(c2Col); QLabel equalsLabel("=", &group); equalsLabel.setAlignment(Qt::AlignHCenter); QLabel outLabel(outText, &group); QComboBox outRowInput(&group); int outRow, outCol; decode_pos(*outCell, &outRow, &outCol); outRowInput.addItems(rows); outRowInput.setCurrentIndex(outRow); QComboBox outColInput(&group); outColInput.addItems(cols); outColInput.setCurrentIndex(outCol); QPushButton cancelButton(tr("Cancel"), &addDialog); connect(&cancelButton, &QAbstractButton::clicked, &addDialog, &QDialog::reject); QPushButton okButton(tr("OK"), &addDialog); okButton.setDefault(true); connect(&okButton, &QAbstractButton::clicked, &addDialog, &QDialog::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; int col; decode_pos(out, &row, &col); table->item(row, col)->setText(tr("sum %1 %2").arg(cell1, cell2)); } } void SpreadSheet::actionMath_helper(const QString &title, const QString &op) { QString cell1 = "C1"; QString cell2 = "C2"; QString out = "C3"; QTableWidgetItem *current = table->currentItem(); if (current) out = encode_pos(table->currentRow(), table->currentColumn()); 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(tr("%1 %2 %3").arg(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("Date")); table->item(0, 1)->setBackgroundColor(titleBackground); table->item(0, 1)->setToolTip("This column shows the purchase date, double click to change"); table->item(0, 1)->setFont(titleFont); table->setItem(1, 1, new SpreadSheetItem("15/6/2006")); table->setItem(2, 1, new SpreadSheetItem("15/6/2006")); table->setItem(3, 1, new SpreadSheetItem("15/6/2006")); table->setItem(4, 1, new SpreadSheetItem("21/5/2006")); table->setItem(5, 1, new SpreadSheetItem("16/6/2006")); table->setItem(6, 1, new SpreadSheetItem("16/6/2006")); table->setItem(7, 1, new SpreadSheetItem("16/6/2006")); table->setItem(8, 1, new SpreadSheetItem("18/6/2006")); table->setItem(9, 1, new SpreadSheetItem()); table->item(9, 1)->setBackgroundColor(Qt::lightGray); // column 2 table->setItem(0, 2, new SpreadSheetItem("Price")); table->item(0, 2)->setBackgroundColor(titleBackground); table->item(0, 2)->setToolTip("This column shows the price of the purchase"); table->item(0, 2)->setFont(titleFont); table->setItem(1, 2, new SpreadSheetItem("150")); table->setItem(2, 2, new SpreadSheetItem("2350")); table->setItem(3, 2, new SpreadSheetItem("-14")); table->setItem(4, 2, new SpreadSheetItem("980")); table->setItem(5, 2, new SpreadSheetItem("5")); table->setItem(6, 2, new SpreadSheetItem("120")); table->setItem(7, 2, new SpreadSheetItem("300")); table->setItem(8, 2, new SpreadSheetItem("1240")); table->setItem(9, 2, new SpreadSheetItem()); table->item(9, 2)->setBackgroundColor(Qt::lightGray); // column 3 table->setItem(0, 3, new SpreadSheetItem("Currency")); table->item(0, 3)->setBackgroundColor(titleBackground); table->item(0, 3)->setToolTip("This column shows the currency"); table->item(0, 3)->setFont(titleFont); table->setItem(1, 3, new SpreadSheetItem("NOK")); table->setItem(2, 3, new SpreadSheetItem("NOK")); table->setItem(3, 3, new SpreadSheetItem("EUR")); table->setItem(4, 3, new SpreadSheetItem("EUR")); table->setItem(5, 3, new SpreadSheetItem("USD")); table->setItem(6, 3, new SpreadSheetItem("USD")); table->setItem(7, 3, new SpreadSheetItem("USD")); table->setItem(8, 3, new SpreadSheetItem("USD")); table->setItem(9, 3, new SpreadSheetItem()); table->item(9,3)->setBackgroundColor(Qt::lightGray); // column 4 table->setItem(0, 4, new SpreadSheetItem("Ex. Rate")); table->item(0, 4)->setBackgroundColor(titleBackground); table->item(0, 4)->setToolTip("This column shows the exchange rate to NOK"); table->item(0, 4)->setFont(titleFont); table->setItem(1, 4, new SpreadSheetItem("1")); table->setItem(2, 4, new SpreadSheetItem("1")); table->setItem(3, 4, new SpreadSheetItem("8")); table->setItem(4, 4, new SpreadSheetItem("8")); table->setItem(5, 4, new SpreadSheetItem("7")); table->setItem(6, 4, new SpreadSheetItem("7")); table->setItem(7, 4, new SpreadSheetItem("7")); table->setItem(8, 4, new SpreadSheetItem("7")); table->setItem(9, 4, new SpreadSheetItem()); table->item(9,4)->setBackgroundColor(Qt::lightGray); // column 5 table->setItem(0, 5, new SpreadSheetItem("NOK")); table->item(0, 5)->setBackgroundColor(titleBackground); table->item(0, 5)->setToolTip("This column shows the expenses in NOK"); table->item(0, 5)->setFont(titleFont); table->setItem(1, 5, new SpreadSheetItem("* C2 E2")); table->setItem(2, 5, new SpreadSheetItem("* C3 E3")); table->setItem(3, 5, new SpreadSheetItem("* C4 E4")); table->setItem(4, 5, new SpreadSheetItem("* C5 E5")); table->setItem(5, 5, new SpreadSheetItem("* C6 E6")); table->setItem(6, 5, new SpreadSheetItem("* C7 E7")); table->setItem(7, 5, new SpreadSheetItem("* C8 E8")); table->setItem(8, 5, new SpreadSheetItem("* C9 E9")); table->setItem(9, 5, new SpreadSheetItem("sum F2 F9")); table->item(9,5)->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>Adding 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 Spreadsheet", htmlText); } void decode_pos(const QString &pos, int *row, int *col) { if (pos.isEmpty()) { *col = -1; *row = -1; } else { *col = pos.at(0).toLatin1() - 'A'; *row = pos.right(pos.size() - 1).toInt() - 1; } } QString encode_pos(int row, int col) { return QString(col + 'A') + QString::number(row + 1); } void SpreadSheet::print() { #if QT_CONFIG(printpreviewdialog) QPrinter printer(QPrinter::ScreenResolution); QPrintPreviewDialog dlg(&printer); PrintView view; view.setModel(table->model()); connect(&dlg, &QPrintPreviewDialog::paintRequested, &view, &PrintView::print); dlg.exec(); #endif }

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