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
|
// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include <QtWidgets>
#include "chatdialog.h"
ChatDialog::ChatDialog(QWidget *parent)
: QDialog(parent)
{
setupUi(this);
lineEdit->setFocusPolicy(Qt::StrongFocus);
textEdit->setFocusPolicy(Qt::NoFocus);
textEdit->setReadOnly(true);
listWidget->setFocusPolicy(Qt::NoFocus);
connect(lineEdit, &QLineEdit::returnPressed,
this, &ChatDialog::returnPressed);
connect(&client, &Client::newMessage,
this, &ChatDialog::appendMessage);
connect(&client, &Client::newParticipant,
this, &ChatDialog::newParticipant);
connect(&client, &Client::participantLeft,
this, &ChatDialog::participantLeft);
myNickName = client.nickName();
newParticipant(myNickName);
tableFormat.setBorder(0);
QTimer::singleShot(10 * 1000, this, SLOT(showInformation()));
}
void ChatDialog::appendMessage(const QString &from, const QString &message)
{
if (from.isEmpty() || message.isEmpty())
return;
QTextCursor cursor(textEdit->textCursor());
cursor.movePosition(QTextCursor::End);
QTextTable *table = cursor.insertTable(1, 2, tableFormat);
table->cellAt(0, 0).firstCursorPosition().insertText('<' + from + "> ");
table->cellAt(0, 1).firstCursorPosition().insertText(message);
QScrollBar *bar = textEdit->verticalScrollBar();
bar->setValue(bar->maximum());
}
void ChatDialog::returnPressed()
{
QString text = lineEdit->text();
if (text.isEmpty())
return;
if (text.startsWith(QChar('/'))) {
QColor color = textEdit->textColor();
textEdit->setTextColor(Qt::red);
textEdit->append(tr("! Unknown command: %1")
.arg(text.left(text.indexOf(' '))));
textEdit->setTextColor(color);
} else {
client.sendMessage(text);
appendMessage(myNickName, text);
}
lineEdit->clear();
}
void ChatDialog::newParticipant(const QString &nick)
{
if (nick.isEmpty())
return;
QColor color = textEdit->textColor();
textEdit->setTextColor(Qt::gray);
textEdit->append(tr("* %1 has joined").arg(nick));
textEdit->setTextColor(color);
listWidget->addItem(nick);
}
void ChatDialog::participantLeft(const QString &nick)
{
if (nick.isEmpty())
return;
QList<QListWidgetItem *> items = listWidget->findItems(nick,
Qt::MatchExactly);
if (items.isEmpty())
return;
delete items.at(0);
QColor color = textEdit->textColor();
textEdit->setTextColor(Qt::gray);
textEdit->append(tr("* %1 has left").arg(nick));
textEdit->setTextColor(color);
}
void ChatDialog::showInformation()
{
if (listWidget->count() == 1) {
QMessageBox::information(this, tr("Chat"),
tr("Launch several instances of this "
"program on your local network and "
"start chatting!"));
}
}
|
