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qt5base-lts/examples/widgets/itemviews/spreadsheet/spreadsheet.cpp
Jani Heikkinen 83a5694dc2 Update copyright headers 
Qt copyrights are now in The Qt Company, so we could update the source
code headers accordingly. In the same go we should also fix the links to
point to qt.io.

Outdated header.LGPL removed (use header.LGPL21 instead)

Old header.LGPL3 renamed to header.LGPL3-COMM to match actual licensing
combination. New header.LGPL-COMM taken in the use file which were
using old header.LGPL3 (src/plugins/platforms/android/extract.cpp)

Added new header.LGPL3 containing Commercial + LGPLv3 + GPLv2 license
combination

Change-Id: I6f49b819a8a20cc4f88b794a8f6726d975e8ffbe
Reviewed-by: Matti Paaso <matti.paaso@theqtcompany.com>
2015-02-11 06:49:51 +00:00

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/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the demonstration applications of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** As a special exception, The Qt Company gives you certain additional
** rights. These rights are described in The Qt Company LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtWidgets>
#ifndef QT_NO_PRINTER
#include <QPrinter>
#include <QPrintDialog>
#include <QPrintPreviewDialog>
#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, 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()));
printAction = new QAction(tr("&Print"), this);
connect(printAction, SIGNAL(triggered()), this, SLOT(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, 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;
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 !defined(QT_NO_PRINTER) && !defined(QT_NO_PRINTDIALOG)
QPrinter printer(QPrinter::ScreenResolution);
QPrintPreviewDialog dlg(&printer);
PrintView view;
view.setModel(table->model());
connect(&dlg, SIGNAL(paintRequested(QPrinter*)), &view, SLOT(print(QPrinter*)));
dlg.exec();
#endif
}
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