qt 6.5.1 original

examples/widgets/itemviews/spreadsheet/CMakeLists.txt

@@ -0,0 +1,59 @@
+# Copyright (C) 2022 The Qt Company Ltd.
+# SPDX-License-Identifier: BSD-3-Clause
+
+cmake_minimum_required(VERSION 3.16)
+project(spreadsheet LANGUAGES CXX)
+
+if(NOT DEFINED INSTALL_EXAMPLESDIR)
+    set(INSTALL_EXAMPLESDIR "examples")
+endif()
+
+set(INSTALL_EXAMPLEDIR "${INSTALL_EXAMPLESDIR}/widgets/itemviews/spreadsheet")
+
+find_package(Qt6
+    REQUIRED COMPONENTS Core Gui Widgets
+    OPTIONAL_COMPONENTS PrintSupport
+)
+
+qt_standard_project_setup()
+
+qt_add_executable(spreadsheet
+    main.cpp
+    printview.cpp printview.h
+    spreadsheet.cpp spreadsheet.h
+    spreadsheetdelegate.cpp spreadsheetdelegate.h
+    spreadsheetitem.cpp spreadsheetitem.h
+)
+
+set_target_properties(spreadsheet PROPERTIES
+    WIN32_EXECUTABLE TRUE
+    MACOSX_BUNDLE TRUE
+)
+
+target_link_libraries(spreadsheet PRIVATE
+    Qt6::Core
+    Qt6::Gui
+    Qt6::Widgets
+)
+
+if (TARGET Qt6::PrintSupport)
+    target_link_libraries(spreadsheet PRIVATE Qt6::PrintSupport)
+endif()
+
+# Resources:
+set(spreadsheet_resource_files
+    "images/interview.png"
+)
+
+qt_add_resources(spreadsheet "spreadsheet"
+    PREFIX
+        "/"
+    FILES
+        ${spreadsheet_resource_files}
+)
+
+install(TARGETS spreadsheet
+    RUNTIME DESTINATION "${INSTALL_EXAMPLEDIR}"
+    BUNDLE DESTINATION "${INSTALL_EXAMPLEDIR}"
+    LIBRARY DESTINATION "${INSTALL_EXAMPLEDIR}"
+)

examples/widgets/itemviews/spreadsheet/main.cpp

@@ -0,0 +1,21 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#include "spreadsheet.h"
+
+#include <QApplication>
+#include <QLayout>
+
+int main(int argc, char **argv)
+{
+    Q_INIT_RESOURCE(spreadsheet);
+
+    QApplication app(argc, argv);
+    SpreadSheet sheet(10, 6);
+    sheet.setWindowIcon(QPixmap(":/images/interview.png"));
+    sheet.show();
+    sheet.layout()->setSizeConstraint(QLayout::SetFixedSize);
+    return app.exec();
+}
+
+

examples/widgets/itemviews/spreadsheet/printview.cpp

@@ -0,0 +1,29 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#include "printview.h"
+
+#if defined(QT_PRINTSUPPORT_LIB)
+#  include <QtPrintSupport/qtprintsupportglobal.h>
+
+#  if QT_CONFIG(printer)
+#    include <QPrinter>
+#  endif
+#endif
+
+PrintView::PrintView()
+{
+    setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
+    setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
+}
+
+void PrintView::print(QPrinter *printer)
+{
+#if defined(QT_PRINTSUPPORT_LIB) && QT_CONFIG(printer)
+    resize(printer->width(), printer->height());
+    render(printer);
+#else
+    Q_UNUSED(printer);
+#endif
+}
+

examples/widgets/itemviews/spreadsheet/printview.h

@@ -0,0 +1,25 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#ifndef PRINTVIEW_H
+#define PRINTVIEW_H
+
+#include <QTableView>
+QT_BEGIN_NAMESPACE
+class QPrinter;
+QT_END_NAMESPACE
+
+class PrintView : public QTableView
+{
+    Q_OBJECT
+
+public:
+    PrintView();
+
+public slots:
+    void print(QPrinter *printer);
+};
+
+#endif // PRINTVIEW_H
+
+

examples/widgets/itemviews/spreadsheet/spreadsheet.cpp

@@ -0,0 +1,605 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#include "spreadsheet.h"
+#include "spreadsheetdelegate.h"
+#include "spreadsheetitem.h"
+#include "printview.h"
+
+#include <QtWidgets>
+#if defined(QT_PRINTSUPPORT_LIB)
+#include <QtPrintSupport>
+#endif
+
+SpreadSheet::SpreadSheet(int rows, int cols, QWidget *parent)
+    : QMainWindow(parent),
+      toolBar(new QToolBar(this)),
+      cellLabel(new QLabel(toolBar)),
+      table(new QTableWidget(rows, cols, this)),
+      formulaInput(new QLineEdit(this))
+{
+    addToolBar(toolBar);
+
+    cellLabel->setMinimumSize(80, 0);
+
+    toolBar->addWidget(cellLabel);
+    toolBar->addWidget(formulaInput);
+
+    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(nullptr);
+    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);
+}
+
+//! [implicit tr context]
+void SpreadSheet::setupMenuBar()
+{
+    QMenu *fileMenu = menuBar()->addMenu(tr("&File"));
+//! [implicit tr context]
+    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->background().color();
+    if (!col.isValid())
+        col = palette().base().color();
+
+    QPainter pt(&pix);
+    pt.fillRect(0, 0, 16, 16, col);
+
+    QColor lighter = col.lighter();
+    pt.setPen(lighter);
+    QPoint lightFrame[] = { QPoint(0, 15), QPoint(0, 0), QPoint(15, 0) };
+    pt.drawPolyline(lightFrame, 3);
+
+    pt.setPen(col.darker());
+    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->background().color() : table->palette().base().color();
+    col = QColorDialog::getColor(col, this);
+    if (!col.isValid())
+        return;
+
+    const QList<QTableWidgetItem *> selected = table->selectedItems();
+    if (selected.isEmpty())
+        return;
+
+    for (QTableWidgetItem *i : selected) {
+        if (i)
+            i->setBackground(col);
+    }
+
+    updateColor(table->currentItem());
+}
+
+void SpreadSheet::selectFont()
+{
+    const QList<QTableWidgetItem *> selected = table->selectedItems();
+    if (selected.isEmpty())
+        return;
+
+    bool ok = false;
+    QFont fnt = QFontDialog::getFont(&ok, font(), this);
+
+    if (!ok)
+        return;
+    for (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;
+
+    const 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);
+    }
+
+    const 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";
+
+    const 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()
+{
+    const QList<QTableWidgetItem *> selectedItems = table->selectedItems();
+    for (QTableWidgetItem *i : selectedItems)
+        i->setText(QString());
+}
+
+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()
+{
+    QBrush titleBackground(Qt::lightGray);
+    QFont titleFont = table->font();
+    titleFont.setBold(true);
+
+    // column 0
+    table->setItem(0, 0, new SpreadSheetItem("Item"));
+    table->item(0, 0)->setBackground(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)->setBackground(titleBackground);
+
+    // column 1
+    table->setItem(0, 1, new SpreadSheetItem("Date"));
+    table->item(0, 1)->setBackground(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)->setBackground(titleBackground);
+
+    // column 2
+    table->setItem(0, 2, new SpreadSheetItem("Price"));
+    table->item(0, 2)->setBackground(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)->setBackground(Qt::lightGray);
+
+    // column 3
+    table->setItem(0, 3, new SpreadSheetItem("Currency"));
+    table->item(0, 3)->setBackground(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)->setBackground(Qt::lightGray);
+
+    // column 4
+    table->setItem(0, 4, new SpreadSheetItem("Ex. Rate"));
+    table->item(0, 4)->setBackground(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)->setBackground(titleBackground);
+
+    // column 5
+    table->setItem(0, 5, new SpreadSheetItem("NOK"));
+    table->item(0, 5)->setBackground(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)->setBackground(titleBackground);
+}
+
+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(char16_t(col + 'A')) + QString::number(row + 1);
+}
+
+
+void SpreadSheet::print()
+{
+#if defined(QT_PRINTSUPPORT_LIB) && 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
+}
+

examples/widgets/itemviews/spreadsheet/spreadsheet.h

@@ -0,0 +1,84 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#ifndef SPREADSHEET_H
+#define SPREADSHEET_H
+
+#include <QMainWindow>
+
+QT_BEGIN_NAMESPACE
+class QAction;
+class QLabel;
+class QLineEdit;
+class QToolBar;
+class QTableWidgetItem;
+class QTableWidget;
+QT_END_NAMESPACE
+
+class SpreadSheet : public QMainWindow
+{
+    Q_OBJECT
+public:
+    SpreadSheet(int rows, int cols, QWidget *parent = nullptr);
+
+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 print();
+
+    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;
+
+    QAction *printAction;
+
+    QLabel *cellLabel;
+    QTableWidget *table;
+    QLineEdit *formulaInput;
+
+};
+
+void decode_pos(const QString &pos, int *row, int *col);
+QString encode_pos(int row, int col);
+
+
+#endif // SPREADSHEET_H
+

examples/widgets/itemviews/spreadsheet/spreadsheet.pro

@@ -0,0 +1,22 @@
+QT += widgets
+requires(qtConfig(treeview))
+qtHaveModule(printsupport): QT += printsupport
+#unix:qtHaveModule(dbus): QT += dbus widgets
+
+HEADERS += printview.h spreadsheet.h spreadsheetdelegate.h spreadsheetitem.h
+SOURCES += main.cpp \
+           printview.cpp \
+           spreadsheet.cpp \
+           spreadsheetdelegate.cpp \
+           spreadsheetitem.cpp
+RESOURCES += spreadsheet.qrc
+
+build_all:!build_pass {
+    CONFIG -= build_all
+    CONFIG += release
+}
+
+# install
+target.path = $$[QT_INSTALL_EXAMPLES]/widgets/itemviews/spreadsheet
+INSTALLS += target
+

examples/widgets/itemviews/spreadsheet/spreadsheet.qrc

@@ -0,0 +1,5 @@
+<!DOCTYPE RCC><RCC version="1.0">
+<qresource prefix="/">
+	<file>images/interview.png</file>
+</qresource>
+</RCC>

examples/widgets/itemviews/spreadsheet/spreadsheetdelegate.cpp

@@ -0,0 +1,78 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#include "spreadsheetdelegate.h"
+
+#include <QtWidgets>
+
+SpreadSheetDelegate::SpreadSheetDelegate(QObject *parent)
+    : QStyledItemDelegate(parent)
+{}
+
+QWidget *SpreadSheetDelegate::createEditor(QWidget *parent,
+                                           const QStyleOptionViewItem &,
+                                           const QModelIndex &index) const
+{
+    if (index.column() == 1) {
+        QDateTimeEdit *editor = new QDateTimeEdit(parent);
+        editor->setDisplayFormat("dd/M/yyyy");
+        editor->setCalendarPopup(true);
+        return editor;
+    }
+
+    QLineEdit *editor = new QLineEdit(parent);
+
+    // create a completer with the strings in the column as model
+    QStringList allStrings;
+    for (int i = 1; i<index.model()->rowCount(); i++) {
+        QString strItem(index.model()->data(index.sibling(i, index.column()),
+            Qt::EditRole).toString());
+
+        if (!allStrings.contains(strItem))
+            allStrings.append(strItem);
+    }
+
+    QCompleter *autoComplete = new QCompleter(allStrings);
+    editor->setCompleter(autoComplete);
+    connect(editor, &QLineEdit::editingFinished, this, &SpreadSheetDelegate::commitAndCloseEditor);
+    return editor;
+}
+
+void SpreadSheetDelegate::commitAndCloseEditor()
+{
+    QLineEdit *editor = qobject_cast<QLineEdit *>(sender());
+    emit commitData(editor);
+    emit closeEditor(editor);
+}
+
+void SpreadSheetDelegate::setEditorData(QWidget *editor,
+                                        const QModelIndex &index) const
+{
+    QLineEdit *edit = qobject_cast<QLineEdit*>(editor);
+    if (edit) {
+        edit->setText(index.model()->data(index, Qt::EditRole).toString());
+        return;
+    }
+
+    QDateTimeEdit *dateEditor = qobject_cast<QDateTimeEdit *>(editor);
+    if (dateEditor) {
+        dateEditor->setDate(QDate::fromString(
+                                index.model()->data(index, Qt::EditRole).toString(),
+                                "d/M/yyyy"));
+    }
+}
+
+void SpreadSheetDelegate::setModelData(QWidget *editor,
+                                       QAbstractItemModel *model,
+                                       const QModelIndex &index) const
+{
+    QLineEdit *edit = qobject_cast<QLineEdit *>(editor);
+    if (edit) {
+        model->setData(index, edit->text());
+        return;
+    }
+
+    QDateTimeEdit *dateEditor = qobject_cast<QDateTimeEdit *>(editor);
+    if (dateEditor)
+        model->setData(index, dateEditor->date().toString("dd/M/yyyy"));
+}

examples/widgets/itemviews/spreadsheet/spreadsheetdelegate.h

@@ -0,0 +1,26 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#ifndef SPREADSHEETDELEGATE_H
+#define SPREADSHEETDELEGATE_H
+
+#include <QStyledItemDelegate>
+
+class SpreadSheetDelegate : public QStyledItemDelegate
+{
+    Q_OBJECT
+
+public:
+    SpreadSheetDelegate(QObject *parent = nullptr);
+    QWidget *createEditor(QWidget *parent, const QStyleOptionViewItem &,
+                          const QModelIndex &index) const override;
+    void setEditorData(QWidget *editor, const QModelIndex &index) const override;
+    void setModelData(QWidget *editor, QAbstractItemModel *model,
+                      const QModelIndex &index) const override;
+
+private slots:
+    void commitAndCloseEditor();
+};
+
+#endif // SPREADSHEETDELEGATE_H
+

examples/widgets/itemviews/spreadsheet/spreadsheetitem.cpp

@@ -0,0 +1,118 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#include "spreadsheetitem.h"
+
+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();
+
+    const QString t = display().toString();
+
+    if (role == Qt::ForegroundRole) {
+        bool isNumber = false;
+        const int number = t.toInt(&isNumber);
+        QColor color = Qt::black;
+        if (isNumber)
+            color = (number < 0) ? Qt::red : Qt::blue;
+        return QVariant::fromValue(color);
+    }
+
+    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
+{
+    // avoid circular dependencies
+    if (isResolving)
+        return QVariant();
+
+    isResolving = true;
+    QVariant result = computeFormula(formula(), tableWidget(), this);
+    isResolving = false;
+    return result;
+}
+
+QVariant SpreadSheetItem::computeFormula(const QString &formula,
+                                         const QTableWidget *widget,
+                                         const QTableWidgetItem *self)
+{
+    // check if the string is actually a formula or not
+    QStringList list = formula.split(' ');
+    if (list.isEmpty() || !widget)
+        return formula; // it is a normal string
+
+    QString op = list.value(0).toLower();
+
+    int firstRow = -1;
+    int firstCol = -1;
+    int secondRow = -1;
+    int secondCol = -1;
+
+    if (list.count() > 1)
+        decode_pos(list.value(1), &firstRow, &firstCol);
+
+    if (list.count() > 2)
+        decode_pos(list.value(2), &secondRow, &secondCol);
+
+    const QTableWidgetItem *start = widget->item(firstRow, firstCol);
+    const QTableWidgetItem *end = widget->item(secondRow, secondCol);
+
+    int firstVal = start ? start->text().toInt() : 0;
+    int secondVal = end ? end->text().toInt() : 0;
+
+    QVariant result;
+    if (op == "sum") {
+        int sum = 0;
+        for (int r = firstRow; r <= secondRow; ++r) {
+            for (int c = firstCol; c <= secondCol; ++c) {
+                const QTableWidgetItem *tableItem = widget->item(r, c);
+                if (tableItem && tableItem != self)
+                    sum += tableItem->text().toInt();
+            }
+        }
+
+        result = sum;
+    } else if (op == "+") {
+        result = (firstVal + secondVal);
+    } else if (op == "-") {
+        result = (firstVal - secondVal);
+    } else if (op == "*") {
+        result = (firstVal * secondVal);
+    } else if (op == "/") {
+        if (secondVal == 0)
+            result = QString("nan");
+        else
+            result = (firstVal / secondVal);
+    } else if (op == "=") {
+        if (start)
+            result = start->text();
+    } else {
+        result = formula;
+    }
+
+    return result;
+}
+

examples/widgets/itemviews/spreadsheet/spreadsheetitem.h

@@ -0,0 +1,36 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#ifndef SPREADSHEETITEM_H
+#define SPREADSHEETITEM_H
+
+#include "spreadsheet.h"
+
+#include <QTableWidgetItem>
+
+class SpreadSheetItem : public QTableWidgetItem
+{
+public:
+    using QTableWidgetItem::QTableWidgetItem;
+
+    QTableWidgetItem *clone() const override;
+
+    QVariant data(int role) const override;
+    void setData(int role, const QVariant &value) override;
+    QVariant display() const;
+
+    inline QString formula() const
+    {
+        return QTableWidgetItem::data(Qt::DisplayRole).toString();
+    }
+
+    static QVariant computeFormula(const QString &formula,
+                                   const QTableWidget *widget,
+                                   const QTableWidgetItem *self = nullptr);
+
+private:
+    mutable bool isResolving = false;
+};
+
+#endif // SPREADSHEETITEM_H
+