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
|
/**************************************************************************
**
** This file is part of Qt Creator
**
** Copyright (c) 2011 Nokia Corporation and/or its subsidiary(-ies).
**
** Contact: Nokia Corporation (info@qt.nokia.com)
**
**
** GNU Lesser General Public License Usage
**
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this file.
** Please review the following information to ensure the GNU Lesser General
** Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** Other Usage
**
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**************************************************************************/
#include "basevalidatinglineedit.h"
#include <QtCore/QDebug>
enum { debug = 0 };
/*!
\namespace Utils
General utility library namespace
*/
/*! \class Utils::BaseValidatingLineEdit
\brief Base class for line edits that perform validation.
Performs validation in a virtual validate() function to be implemented in
derived classes.
When invalid, the text color will turn red and a tooltip will
contain the error message. This approach is less intrusive than a
QValidator which will prevent the user from entering certain characters.
The widget has a concept of an "initialText" which can be something like
"<Enter name here>". This results in state 'DisplayingInitialText', which
is not valid, but is not marked red.
*/
namespace Utils {
struct BaseValidatingLineEditPrivate {
explicit BaseValidatingLineEditPrivate(const QWidget *w);
const QColor m_okTextColor;
QColor m_errorTextColor;
BaseValidatingLineEdit::State m_state;
QString m_errorMessage;
QString m_initialText;
bool m_firstChange;
};
BaseValidatingLineEditPrivate::BaseValidatingLineEditPrivate(const QWidget *w) :
m_okTextColor(BaseValidatingLineEdit::textColor(w)),
m_errorTextColor(Qt::red),
m_state(BaseValidatingLineEdit::Invalid),
m_firstChange(true)
{
}
BaseValidatingLineEdit::BaseValidatingLineEdit(QWidget *parent) :
QLineEdit(parent),
m_bd(new BaseValidatingLineEditPrivate(this))
{
// Note that textChanged() is also triggered automagically by
// QLineEdit::setText(), no need to trigger manually.
connect(this, SIGNAL(textChanged(QString)), this, SLOT(slotChanged(QString)));
}
BaseValidatingLineEdit::~BaseValidatingLineEdit()
{
delete m_bd;
}
QString BaseValidatingLineEdit::initialText() const
{
return m_bd->m_initialText;
}
void BaseValidatingLineEdit::setInitialText(const QString &t)
{
if (m_bd->m_initialText != t) {
m_bd->m_initialText = t;
m_bd->m_firstChange = true;
setText(t);
}
}
QColor BaseValidatingLineEdit::errorColor() const
{
return m_bd->m_errorTextColor;
}
void BaseValidatingLineEdit::setErrorColor(const QColor &c)
{
m_bd->m_errorTextColor = c;
}
QColor BaseValidatingLineEdit::textColor(const QWidget *w)
{
return w->palette().color(QPalette::Active, QPalette::Text);
}
void BaseValidatingLineEdit::setTextColor(QWidget *w, const QColor &c)
{
QPalette palette = w->palette();
palette.setColor(QPalette::Active, QPalette::Text, c);
w->setPalette(palette);
}
BaseValidatingLineEdit::State BaseValidatingLineEdit::state() const
{
return m_bd->m_state;
}
bool BaseValidatingLineEdit::isValid() const
{
return m_bd->m_state == Valid;
}
QString BaseValidatingLineEdit::errorMessage() const
{
return m_bd->m_errorMessage;
}
void BaseValidatingLineEdit::slotChanged(const QString &t)
{
m_bd->m_errorMessage.clear();
// Are we displaying the initial text?
const bool isDisplayingInitialText = !m_bd->m_initialText.isEmpty() && t == m_bd->m_initialText;
const State newState = isDisplayingInitialText ?
DisplayingInitialText :
(validate(t, &m_bd->m_errorMessage) ? Valid : Invalid);
setToolTip(m_bd->m_errorMessage);
if (debug)
qDebug() << Q_FUNC_INFO << t << "State" << m_bd->m_state << "->" << newState << m_bd->m_errorMessage;
// Changed..figure out if valid changed. DisplayingInitialText is not valid,
// but should not show error color. Also trigger on the first change.
if (newState != m_bd->m_state || m_bd->m_firstChange) {
const bool validHasChanged = (m_bd->m_state == Valid) != (newState == Valid);
m_bd->m_state = newState;
m_bd->m_firstChange = false;
setTextColor(this, newState == Invalid ? m_bd->m_errorTextColor : m_bd->m_okTextColor);
if (validHasChanged) {
emit validChanged(newState == Valid);
emit validChanged();
}
}
}
void BaseValidatingLineEdit::slotReturnPressed()
{
if (isValid())
emit validReturnPressed();
}
void BaseValidatingLineEdit::triggerChanged()
{
slotChanged(text());
}
} // namespace Utils
|
