1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
|
/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the documentation of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
** of its contributors may be used to endorse or promote products derived
** from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/
/*
model.cpp
Provides a table model for use in various examples.
*/
#include <QtGui>
#include "model.h"
/*!
Constructs a table model with at least one row and one column.
*/
TableModel::TableModel(int rows, int columns, QObject *parent)
: QAbstractTableModel(parent)
{
QStringList newList;
for (int column = 0; column < qMax(1, columns); ++column) {
newList.append("");
}
for (int row = 0; row < qMax(1, rows); ++row) {
rowList.append(newList);
}
}
/*!
Returns the number of items in the row list as the number of rows
in the model.
*/
int TableModel::rowCount(const QModelIndex &/*parent*/) const
{
return rowList.size();
}
/*!
Returns the number of items in the first list item as the number of
columns in the model. All rows should have the same number of columns.
*/
int TableModel::columnCount(const QModelIndex &/*parent*/) const
{
return rowList[0].size();
}
/*!
Returns an appropriate value for the requested data.
If the view requests an invalid index, an invalid variant is returned.
Any valid index that corresponds to a string in the list causes that
string to be returned for the display role; otherwise an invalid variant
is returned.
*/
QVariant TableModel::data(const QModelIndex &index, int role) const
{
if (!index.isValid())
return QVariant();
if (role == Qt::DisplayRole)
return rowList[index.row()][index.column()];
else
return QVariant();
}
/*!
Returns the appropriate header string depending on the orientation of
the header and the section. If anything other than the display role is
requested, we return an invalid variant.
*/
QVariant TableModel::headerData(int section, Qt::Orientation orientation,
int role) const
{
if (role != Qt::DisplayRole)
return QVariant();
if (orientation == Qt::Horizontal)
return QString("Column %1").arg(section);
else
return QString("Row %1").arg(section);
}
/*!
Returns an appropriate value for the item's flags. Valid items are
enabled, selectable, and editable.
*/
Qt::ItemFlags TableModel::flags(const QModelIndex &index) const
{
if (!index.isValid())
return Qt::ItemIsEnabled;
return Qt::ItemIsEnabled | Qt::ItemIsSelectable | Qt::ItemIsEditable;
}
/*!
Changes an item in the model, but only if the following conditions
are met:
* The index supplied is valid.
* The role associated with editing text is specified.
The dataChanged() signal is emitted if the item is changed.
*/
bool TableModel::setData(const QModelIndex &index,
const QVariant &value, int role)
{
if (!index.isValid() || role != Qt::EditRole)
return false;
rowList[index.row()][index.column()] = value.toString();
emit dataChanged(index, index);
return true;
}
/*!
Inserts a number of rows into the model at the specified position.
*/
bool TableModel::insertRows(int position, int rows, const QModelIndex &parent)
{
int columns = columnCount();
beginInsertRows(parent, position, position + rows - 1);
for (int row = 0; row < rows; ++row) {
QStringList items;
for (int column = 0; column < columns; ++column)
items.append("");
rowList.insert(position, items);
}
endInsertRows();
return true;
}
/*!
Inserts a number of columns into the model at the specified position.
Each entry in the list is extended in turn with the required number of
empty strings.
*/
bool TableModel::insertColumns(int position, int columns, const QModelIndex &parent)
{
int rows = rowCount();
beginInsertColumns(parent, position, position + columns - 1);
for (int row = 0; row < rows; ++row) {
for (int column = position; column < columns; ++column) {
rowList[row].insert(position, "");
}
}
endInsertColumns();
return true;
}
/*!
Removes a number of rows from the model at the specified position.
*/
bool TableModel::removeRows(int position, int rows, const QModelIndex &parent)
{
beginRemoveRows(parent, position, position + rows - 1);
for (int row = 0; row < rows; ++row) {
rowList.removeAt(position);
}
endRemoveRows();
return true;
}
/*!
Removes a number of columns from the model at the specified position.
Each row is shortened by the number of columns specified.
*/
bool TableModel::removeColumns(int position, int columns, const QModelIndex &parent)
{
int rows = rowCount();
beginRemoveColumns(parent, position, position + columns - 1);
for (int row = 0; row < rows; ++row) {
for (int column = 0; column < columns; ++column) {
rowList[row].removeAt(position);
}
}
endRemoveColumns();
return true;
}
|
