| /**************************************************************************** |
| ** |
| ** Copyright (C) 2016 The Qt Company Ltd. |
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| ** This file is part of the demonstration applications of the Qt Toolkit. |
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| ** BSD License Usage |
| ** Alternatively, you may use this file under the terms of the BSD license |
| ** as follows: |
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| |
| #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; |
| } |
| |