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krestrictedline.cpp
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1 /*
2  *
3  *
4  * Implementation of KRestrictedLine
5  *
6  * Copyright (C) 1997 Michael Wiedmann, <mw@miwie.in-berlin.de>
7  *
8  * This library is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Library General Public
10  * License as published by the Free Software Foundation; either
11  * version 2 of the License, or (at your option) any later version.
12  *
13  * This library is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Library General Public License for more details.
17  *
18  * You should have received a copy of the GNU Library General Public
19  * License along with this library; if not, write to the Free
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  *
22  */
23 
24 #include "krestrictedline.h"
25 #include <kdebug.h>
26 
27 #include <QtGui/QKeyEvent>
28 
29 class KRestrictedLinePrivate
30 {
31 public:
33  QString qsValidChars;
34 };
35 
36 KRestrictedLine::KRestrictedLine( QWidget *parent )
37  : KLineEdit( parent )
38  , d( new KRestrictedLinePrivate )
39 {
40 }
41 
42 KRestrictedLine::~KRestrictedLine()
43 {
44  delete d;
45 }
46 
47 
48 void KRestrictedLine::keyPressEvent( QKeyEvent *e )
49 {
50  // let KLineEdit process "special" keys and return/enter
51  // so that we still can use the default key binding
52  if (e->key() == Qt::Key_Enter || e->key() == Qt::Key_Return || e->key() == Qt::Key_Delete
53  || e->key() == Qt::Key_Backspace
54  || (e->modifiers() & (Qt::ControlModifier | Qt::AltModifier
55  | Qt::MetaModifier | Qt::GroupSwitchModifier)))
56  {
57  KLineEdit::keyPressEvent(e);
58  return;
59  }
60 
61  // do we have a list of valid chars &&
62  // is the pressed key in the list of valid chars?
63  if (!d->qsValidChars.isEmpty() && !d->qsValidChars.contains(e->text())) {
64  // invalid char, emit signal and return
65  emit invalidChar(e->key());
66  } else {
67  // valid char: let KLineEdit process this key as usual
68  KLineEdit::keyPressEvent(e);
69  }
70 }
71 
72 void KRestrictedLine::inputMethodEvent(QInputMethodEvent *e)
73 {
74  const QString str = e->commitString();
75  if (!d->qsValidChars.isEmpty() && !str.isEmpty()) {
76  bool allOK = true;
77  Q_FOREACH(QChar ch, str) {
78  if (!d->qsValidChars.contains(ch)) {
79  emit invalidChar(ch.unicode());
80  allOK = false;
81  }
82  }
83  // ## we can't remove invalid chars from the string, however.
84  // we really need a validator (with a different signal like invalidChar(QChar)
85  // or invalidCharacters(QString) maybe.
86 
87  if (!allOK)
88  return;
89  }
90 
91  KLineEdit::inputMethodEvent(e);
92 }
93 
94 void KRestrictedLine::setValidChars( const QString& valid)
95 {
96  d->qsValidChars = valid;
97 }
98 
99 QString KRestrictedLine::validChars() const
100 {
101  return d->qsValidChars;
102 }
103 
104 #include "krestrictedline.moc"
QWidget
QKeyEvent::modifiers
Qt::KeyboardModifiers modifiers() const
kdebug.h
QInputMethodEvent
QChar
KRestrictedLine::KRestrictedLine
KRestrictedLine(QWidget *parent=0)
Constructor.
Definition: krestrictedline.cpp:36
KRestrictedLine::invalidChar
void invalidChar(int)
Emitted when an invalid character was typed.
KLineEdit::keyPressEvent
virtual void keyPressEvent(QKeyEvent *)
Re-implemented for internal reasons.
Definition: klineedit.cpp:702
QString::isEmpty
bool isEmpty() const
KRestrictedLine::keyPressEvent
void keyPressEvent(QKeyEvent *e)
Re-implemented for internal reasons.
Definition: krestrictedline.cpp:48
QKeyEvent::text
QString text() const
krestrictedline.h
QString
QChar::unicode
ushort unicode() const
QKeyEvent::key
int key() const
KRestrictedLine::inputMethodEvent
void inputMethodEvent(QInputMethodEvent *e)
Definition: krestrictedline.cpp:72
KRestrictedLine::~KRestrictedLine
~KRestrictedLine()
Destructs the restricted line editor.
Definition: krestrictedline.cpp:42
QKeyEvent
KLineEdit
An enhanced QLineEdit widget for inputting text.
Definition: klineedit.h:149
KRestrictedLine::setValidChars
void setValidChars(const QString &valid)
All characters in the string valid are treated as acceptable characters.
Definition: krestrictedline.cpp:94
QLineEdit::inputMethodEvent
virtual void inputMethodEvent(QInputMethodEvent *e)
KRestrictedLine::validChars
QString validChars() const
QInputMethodEvent::commitString
const QString & commitString() const
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