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50
51#include "spreadsheetitem.h"
52
53QTableWidgetItem *SpreadSheetItem::clone() const
54{
55 SpreadSheetItem *item = new SpreadSheetItem;
56 *item = *this;
57 return item;
58}
59
60QVariant SpreadSheetItem::data(int role) const
61{
62 if (role == Qt::EditRole || role == Qt::StatusTipRole)
63 return formula();
64
65 if (role == Qt::DisplayRole)
66 return display();
67
68 const QString t = display().toString();
69
70 if (role == Qt::ForegroundRole) {
71 bool isNumber = false;
72 const int number = t.toInt(ok: &isNumber);
73 QColor color = Qt::black;
74 if (isNumber)
75 color = (number < 0) ? Qt::red : Qt::blue;
76 return QVariant::fromValue(value: color);
77 }
78
79 if (role == Qt::TextAlignmentRole)
80 if (!t.isEmpty() && (t.at(i: 0).isNumber() || t.at(i: 0) == '-'))
81 return int(Qt::AlignRight | Qt::AlignVCenter);
82
83 return QTableWidgetItem::data(role);
84 }
85
86void SpreadSheetItem::setData(int role, const QVariant &value)
87{
88 QTableWidgetItem::setData(role, value);
89 if (tableWidget())
90 tableWidget()->viewport()->update();
91}
92
93QVariant SpreadSheetItem::display() const
94{
95 // avoid circular dependencies
96 if (isResolving)
97 return QVariant();
98
99 isResolving = true;
100 QVariant result = computeFormula(formula: formula(), widget: tableWidget(), self: this);
101 isResolving = false;
102 return result;
103}
104
105QVariant SpreadSheetItem::computeFormula(const QString &formula,
106 const QTableWidget *widget,
107 const QTableWidgetItem *self)
108{
109 // check if the string is actually a formula or not
110 QStringList list = formula.split(sep: ' ');
111 if (list.isEmpty() || !widget)
112 return formula; // it is a normal string
113
114 QString op = list.value(i: 0).toLower();
115
116 int firstRow = -1;
117 int firstCol = -1;
118 int secondRow = -1;
119 int secondCol = -1;
120
121 if (list.count() > 1)
122 decode_pos(pos: list.value(i: 1), row: &firstRow, col: &firstCol);
123
124 if (list.count() > 2)
125 decode_pos(pos: list.value(i: 2), row: &secondRow, col: &secondCol);
126
127 const QTableWidgetItem *start = widget->item(row: firstRow, column: firstCol);
128 const QTableWidgetItem *end = widget->item(row: secondRow, column: secondCol);
129
130 int firstVal = start ? start->text().toInt() : 0;
131 int secondVal = end ? end->text().toInt() : 0;
132
133 QVariant result;
134 if (op == "sum") {
135 int sum = 0;
136 for (int r = firstRow; r <= secondRow; ++r) {
137 for (int c = firstCol; c <= secondCol; ++c) {
138 const QTableWidgetItem *tableItem = widget->item(row: r, column: c);
139 if (tableItem && tableItem != self)
140 sum += tableItem->text().toInt();
141 }
142 }
143
144 result = sum;
145 } else if (op == "+") {
146 result = (firstVal + secondVal);
147 } else if (op == "-") {
148 result = (firstVal - secondVal);
149 } else if (op == "*") {
150 result = (firstVal * secondVal);
151 } else if (op == "/") {
152 if (secondVal == 0)
153 result = QString("nan");
154 else
155 result = (firstVal / secondVal);
156 } else if (op == "=") {
157 if (start)
158 result = start->text();
159 } else {
160 result = formula;
161 }
162
163 return result;
164}
165
166

source code of qtbase/examples/widgets/itemviews/spreadsheet/spreadsheetitem.cpp