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qt5base-lts/examples/itemviews/spreadsheet/spreadsheet.cpp
Jason McDonald 1fdfc2abfe Update copyright year in license headers. 
Change-Id: I02f2c620296fcd91d4967d58767ea33fc4e1e7dc
Reviewed-by: Rohan McGovern <rohan.mcgovern@nokia.com>
2012-01-05 06:36:56 +01:00

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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the demonstration applications of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this
** file. Please review the following information to ensure the GNU Lesser
** General Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 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 the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtWidgets>
#include <QPrinter>
#include <QPrintDialog>
#include <QPrintPreviewDialog>
#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);
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, 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()
{
#ifndef QT_NO_PRINTER
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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