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
|
// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include <QtWidgets>
#include "addressbook.h"
AddressBook::AddressBook(QWidget *parent)
: QWidget(parent)
{
QLabel *nameLabel = new QLabel(tr("Name:"));
nameLine = new QLineEdit;
nameLine->setReadOnly(true);
QLabel *addressLabel = new QLabel(tr("Address:"));
addressText = new QTextEdit;
addressText->setReadOnly(true);
addButton = new QPushButton(tr("&Add"));
addButton->show();
submitButton = new QPushButton(tr("&Submit"));
submitButton->hide();
cancelButton = new QPushButton(tr("&Cancel"));
cancelButton->hide();
//! [navigation pushbuttons]
nextButton = new QPushButton(tr("&Next"));
nextButton->setEnabled(false);
previousButton = new QPushButton(tr("&Previous"));
previousButton->setEnabled(false);
//! [navigation pushbuttons]
connect(addButton, &QPushButton::clicked,
this, &AddressBook::addContact);
connect(submitButton, &QPushButton::clicked,
this, &AddressBook::submitContact);
connect(cancelButton, &QPushButton::clicked,
this, &AddressBook::cancel);
//! [connecting navigation signals]
connect(nextButton, &QPushButton::clicked,
this, &AddressBook::next);
connect(previousButton, &QPushButton::clicked,
this, &AddressBook::previous);
//! [connecting navigation signals]
QVBoxLayout *buttonLayout1 = new QVBoxLayout;
buttonLayout1->addWidget(addButton, Qt::AlignTop);
buttonLayout1->addWidget(submitButton);
buttonLayout1->addWidget(cancelButton);
buttonLayout1->addStretch();
//! [navigation layout]
QHBoxLayout *buttonLayout2 = new QHBoxLayout;
buttonLayout2->addWidget(previousButton);
buttonLayout2->addWidget(nextButton);
//! [ navigation layout]
QGridLayout *mainLayout = new QGridLayout;
mainLayout->addWidget(nameLabel, 0, 0);
mainLayout->addWidget(nameLine, 0, 1);
mainLayout->addWidget(addressLabel, 1, 0, Qt::AlignTop);
mainLayout->addWidget(addressText, 1, 1);
mainLayout->addLayout(buttonLayout1, 1, 2);
//! [adding navigation layout]
mainLayout->addLayout(buttonLayout2, 2, 1);
//! [adding navigation layout]
setLayout(mainLayout);
setWindowTitle(tr("Simple Address Book"));
}
void AddressBook::addContact()
{
oldName = nameLine->text();
oldAddress = addressText->toPlainText();
nameLine->clear();
addressText->clear();
nameLine->setReadOnly(false);
nameLine->setFocus(Qt::OtherFocusReason);
addressText->setReadOnly(false);
addButton->setEnabled(false);
//! [disabling navigation]
nextButton->setEnabled(false);
previousButton->setEnabled(false);
//! [disabling navigation]
submitButton->show();
cancelButton->show();
}
void AddressBook::submitContact()
{
QString name = nameLine->text();
QString address = addressText->toPlainText();
if (name.isEmpty() || address.isEmpty()) {
QMessageBox::information(this, tr("Empty Field"),
tr("Please enter a name and address."));
return;
}
if (!contacts.contains(name)) {
contacts.insert(name, address);
QMessageBox::information(this, tr("Add Successful"),
tr("\"%1\" has been added to your address book.").arg(name));
} else {
QMessageBox::information(this, tr("Add Unsuccessful"),
tr("Sorry, \"%1\" is already in your address book.").arg(name));
}
if (contacts.isEmpty()) {
nameLine->clear();
addressText->clear();
}
nameLine->setReadOnly(true);
addressText->setReadOnly(true);
addButton->setEnabled(true);
//! [enabling navigation]
int number = contacts.size();
nextButton->setEnabled(number > 1);
previousButton->setEnabled(number > 1);
//! [enabling navigation]
submitButton->hide();
cancelButton->hide();
}
void AddressBook::cancel()
{
nameLine->setText(oldName);
addressText->setText(oldAddress);
if (contacts.isEmpty()) {
nameLine->clear();
addressText->clear();
}
nameLine->setReadOnly(true);
addressText->setReadOnly(true);
addButton->setEnabled(true);
int number = contacts.size();
nextButton->setEnabled(number > 1);
previousButton->setEnabled(number > 1);
submitButton->hide();
cancelButton->hide();
}
//! [next() function]
void AddressBook::next()
{
QString name = nameLine->text();
QMap<QString, QString>::iterator i = contacts.find(name);
if (i != contacts.end())
i++;
if (i == contacts.end())
i = contacts.begin();
nameLine->setText(i.key());
addressText->setText(i.value());
}
//! [next() function]
//! [previous() function]
void AddressBook::previous()
{
QString name = nameLine->text();
QMap<QString, QString>::iterator i = contacts.find(name);
if (i == contacts.end()){
nameLine->clear();
addressText->clear();
return;
}
if (i == contacts.begin())
i = contacts.end();
i--;
nameLine->setText(i.key());
addressText->setText(i.value());
}
//! [previous() function]
|
