| 1 | /****************************************************************************
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| 2 | **
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| 3 | ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
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| 4 | ** All rights reserved.
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| 5 | ** Contact: Nokia Corporation (qt-info@nokia.com)
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| 6 | **
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| 7 | ** This file is part of the QtGui module of the Qt Toolkit.
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| 8 | **
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| 9 | ** $QT_BEGIN_LICENSE:LGPL$
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| 10 | ** Commercial Usage
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| 11 | ** Licensees holding valid Qt Commercial licenses may use this file in
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| 12 | ** accordance with the Qt Commercial License Agreement provided with the
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| 13 | ** Software or, alternatively, in accordance with the terms contained in
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| 14 | ** a written agreement between you and Nokia.
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| 15 | **
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| 16 | ** GNU Lesser General Public License Usage
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| 17 | ** Alternatively, this file may be used under the terms of the GNU Lesser
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| 18 | ** General Public License version 2.1 as published by the Free Software
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| 19 | ** Foundation and appearing in the file LICENSE.LGPL included in the
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| 20 | ** packaging of this file. Please review the following information to
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| 21 | ** ensure the GNU Lesser General Public License version 2.1 requirements
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| 22 | ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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| 23 | **
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| 24 | ** In addition, as a special exception, Nokia gives you certain additional
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| 25 | ** rights. These rights are described in the Nokia Qt LGPL Exception
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| 26 | ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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| 27 | **
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| 28 | ** GNU General Public License Usage
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| 29 | ** Alternatively, this file may be used under the terms of the GNU
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| 30 | ** General Public License version 3.0 as published by the Free Software
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| 31 | ** Foundation and appearing in the file LICENSE.GPL included in the
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| 32 | ** packaging of this file. Please review the following information to
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| 33 | ** ensure the GNU General Public License version 3.0 requirements will be
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| 34 | ** met: http://www.gnu.org/copyleft/gpl.html.
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| 35 | **
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| 36 | ** If you have questions regarding the use of this file, please contact
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| 37 | ** Nokia at qt-info@nokia.com.
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| 38 | ** $QT_END_LICENSE$
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| 39 | **
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| 40 | ****************************************************************************/
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| 41 |
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| 42 | #ifndef QLINECONTROL_P_H
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| 43 | #define QLINECONTROL_P_H
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| 44 |
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| 45 | //
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| 46 | // W A R N I N G
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| 47 | // -------------
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| 48 | //
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| 49 | // This file is not part of the Qt API. It exists purely as an
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| 50 | // implementation detail. This header file may change from version to
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| 51 | // version without notice, or even be removed.
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| 52 | //
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| 53 | // We mean it.
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| 54 | //
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| 55 |
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| 56 | #include "QtCore/qglobal.h"
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| 57 |
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| 58 | #ifndef QT_NO_LINEEDIT
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| 59 | #include "private/qwidget_p.h"
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| 60 | #include "QtGui/qlineedit.h"
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| 61 | #include "QtGui/qtextlayout.h"
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| 62 | #include "QtGui/qstyleoption.h"
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| 63 | #include "QtCore/qpointer.h"
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| 64 | #include "QtGui/qlineedit.h"
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| 65 | #include "QtGui/qclipboard.h"
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| 66 | #include "QtCore/qpoint.h"
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| 67 | #include "QtGui/qcompleter.h"
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| 68 |
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| 69 | QT_BEGIN_HEADER
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| 70 |
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| 71 | QT_BEGIN_NAMESPACE
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| 72 |
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| 73 | QT_MODULE(Gui)
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| 74 |
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| 75 | class Q_GUI_EXPORT QLineControl : public QObject
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| 76 | {
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| 77 | Q_OBJECT
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| 78 |
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| 79 | public:
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| 80 | QLineControl(const QString &txt = QString())
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| 81 | : m_cursor(0), m_preeditCursor(0), m_cursorWidth(0), m_layoutDirection(Qt::LayoutDirectionAuto),
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| 82 | m_hideCursor(false), m_separator(0), m_readOnly(0),
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| 83 | m_dragEnabled(0), m_echoMode(0), m_textDirty(0), m_selDirty(0),
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| 84 | m_validInput(1), m_blinkStatus(0), m_blinkPeriod(0), m_blinkTimer(0), m_deleteAllTimer(0),
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| 85 | m_ascent(0), m_maxLength(32767), m_lastCursorPos(-1),
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| 86 | m_tripleClickTimer(0), m_maskData(0), m_modifiedState(0), m_undoState(0),
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| 87 | m_selstart(0), m_selend(0), m_passwordEchoEditing(false)
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| 88 | {
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| 89 | init(txt);
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| 90 | }
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| 91 |
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| 92 | ~QLineControl()
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| 93 | {
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| 94 | delete [] m_maskData;
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| 95 | }
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| 96 |
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| 97 | int nextMaskBlank(int pos)
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| 98 | {
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| 99 | int c = findInMask(pos, true, false);
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| 100 | m_separator |= (c != pos);
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| 101 | return (c != -1 ? c : m_maxLength);
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| 102 | }
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| 103 |
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| 104 | int prevMaskBlank(int pos)
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| 105 | {
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| 106 | int c = findInMask(pos, false, false);
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| 107 | m_separator |= (c != pos);
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| 108 | return (c != -1 ? c : 0);
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| 109 | }
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| 110 |
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| 111 | bool isUndoAvailable() const { return !m_readOnly && m_undoState; }
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| 112 | bool isRedoAvailable() const { return !m_readOnly && m_undoState < (int)m_history.size(); }
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| 113 | void clearUndo() { m_history.clear(); m_modifiedState = m_undoState = 0; }
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| 114 |
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| 115 | bool isModified() const { return m_modifiedState != m_undoState; }
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| 116 | void setModified(bool modified) { m_modifiedState = modified ? -1 : m_undoState; }
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| 117 |
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| 118 | bool allSelected() const { return !m_text.isEmpty() && m_selstart == 0 && m_selend == (int)m_text.length(); }
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| 119 | bool hasSelectedText() const { return !m_text.isEmpty() && m_selend > m_selstart; }
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| 120 |
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| 121 | int width() const { return qRound(m_textLayout.lineAt(0).width()) + 1; }
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| 122 | int height() const { return qRound(m_textLayout.lineAt(0).height()) + 1; }
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| 123 | int ascent() const { return m_ascent; }
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| 124 | qreal naturalTextWidth() const { return m_textLayout.lineAt(0).naturalTextWidth(); }
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| 125 |
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| 126 | void setSelection(int start, int length);
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| 127 |
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| 128 | inline QString selectedText() const { return hasSelectedText() ? m_text.mid(m_selstart, m_selend - m_selstart) : QString(); }
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| 129 | QString textBeforeSelection() const { return hasSelectedText() ? m_text.left(m_selstart) : QString(); }
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| 130 | QString textAfterSelection() const { return hasSelectedText() ? m_text.mid(m_selend) : QString(); }
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| 131 |
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| 132 | int selectionStart() const { return hasSelectedText() ? m_selstart : -1; }
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| 133 | int selectionEnd() const { return hasSelectedText() ? m_selend : -1; }
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| 134 | bool inSelection(int x) const
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| 135 | {
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| 136 | if (m_selstart >= m_selend)
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| 137 | return false;
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| 138 | int pos = xToPos(x, QTextLine::CursorOnCharacter);
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| 139 | return pos >= m_selstart && pos < m_selend;
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| 140 | }
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| 141 |
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| 142 | void removeSelection()
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| 143 | {
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| 144 | int priorState = m_undoState;
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| 145 | removeSelectedText();
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| 146 | finishChange(priorState);
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| 147 | }
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| 148 |
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| 149 | int start() const { return 0; }
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| 150 | int end() const { return m_text.length(); }
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| 151 |
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| 152 | #ifndef QT_NO_CLIPBOARD
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| 153 | void copy(QClipboard::Mode mode = QClipboard::Clipboard) const;
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| 154 | void paste(QClipboard::Mode mode = QClipboard::Clipboard);
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| 155 | #endif
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| 156 |
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| 157 | int cursor() const{ return m_cursor; }
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| 158 | int preeditCursor() const { return m_preeditCursor; }
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| 159 |
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| 160 | int cursorWidth() const { return m_cursorWidth; }
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| 161 | void setCursorWidth(int value) { m_cursorWidth = value; }
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| 162 |
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| 163 |
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| 164 | void moveCursor(int pos, bool mark = false);
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| 165 | void cursorForward(bool mark, int steps)
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| 166 | {
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| 167 | int c = m_cursor;
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| 168 | if (steps > 0) {
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| 169 | while (steps--)
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| 170 | c = m_textLayout.nextCursorPosition(c);
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| 171 | } else if (steps < 0) {
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| 172 | while (steps++)
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| 173 | c = m_textLayout.previousCursorPosition(c);
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| 174 | }
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| 175 | moveCursor(c, mark);
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| 176 | }
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| 177 |
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| 178 | void cursorWordForward(bool mark) { moveCursor(m_textLayout.nextCursorPosition(m_cursor, QTextLayout::SkipWords), mark); }
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| 179 | void cursorWordBackward(bool mark) { moveCursor(m_textLayout.previousCursorPosition(m_cursor, QTextLayout::SkipWords), mark); }
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| 180 |
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| 181 | void home(bool mark) { moveCursor(0, mark); }
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| 182 | void end(bool mark) { moveCursor(text().length(), mark); }
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| 183 |
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| 184 | int xToPos(int x, QTextLine::CursorPosition = QTextLine::CursorBetweenCharacters) const;
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| 185 | QRect cursorRect() const;
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| 186 |
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| 187 | qreal cursorToX(int cursor) const { return m_textLayout.lineAt(0).cursorToX(cursor); }
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| 188 | qreal cursorToX() const
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| 189 | {
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| 190 | int cursor = m_cursor;
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| 191 | if (m_preeditCursor != -1)
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| 192 | cursor += m_preeditCursor;
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| 193 | return cursorToX(cursor);
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| 194 | }
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| 195 |
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| 196 | bool isReadOnly() const { return m_readOnly; }
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| 197 | void setReadOnly(bool enable) { m_readOnly = enable; }
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| 198 |
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| 199 | QString text() const
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| 200 | {
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| 201 | QString res = m_maskData ? stripString(m_text) : m_text;
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| 202 | return (res.isNull() ? QString::fromLatin1("") : res);
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| 203 | }
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| 204 | void setText(const QString &txt) { internalSetText(txt, -1, false); }
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| 205 | QString displayText() const { return m_textLayout.text(); }
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| 206 |
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| 207 | void backspace();
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| 208 | void del();
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| 209 | void deselect() { internalDeselect(); finishChange(); }
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| 210 | void selectAll() { m_selstart = m_selend = m_cursor = 0; moveCursor(m_text.length(), true); }
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| 211 |
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| 212 | void insert(const QString &);
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| 213 | void clear();
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| 214 | void undo() { internalUndo(); finishChange(-1, true); }
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| 215 | void redo() { internalRedo(); finishChange(); }
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| 216 | void selectWordAtPos(int);
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| 217 |
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| 218 | uint echoMode() const { return m_echoMode; }
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| 219 | void setEchoMode(uint mode)
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| 220 | {
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| 221 | m_echoMode = mode;
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| 222 | m_passwordEchoEditing = false;
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| 223 | updateDisplayText();
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| 224 | }
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| 225 |
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| 226 | int maxLength() const { return m_maxLength; }
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| 227 | void setMaxLength(int maxLength)
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| 228 | {
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| 229 | if (m_maskData)
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| 230 | return;
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| 231 | m_maxLength = maxLength;
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| 232 | setText(m_text);
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| 233 | }
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| 234 |
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| 235 | #ifndef QT_NO_VALIDATOR
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| 236 | const QValidator *validator() const { return m_validator; }
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| 237 | void setValidator(const QValidator *v) { m_validator = const_cast<QValidator*>(v); }
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| 238 | #endif
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| 239 |
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| 240 | #ifndef QT_NO_COMPLETER
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| 241 | QCompleter *completer() const { return m_completer; }
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| 242 | /* Note that you must set the widget for the completer separately */
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| 243 | void setCompleter(const QCompleter *c) { m_completer = const_cast<QCompleter*>(c); }
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| 244 | void complete(int key);
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| 245 | #endif
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| 246 |
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| 247 | int cursorPosition() const { return m_cursor; }
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| 248 | void setCursorPosition(int pos) { if (pos <= m_text.length()) moveCursor(qMax(0, pos)); }
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| 249 |
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| 250 | bool hasAcceptableInput() const { return hasAcceptableInput(m_text); }
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| 251 | bool fixup();
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| 252 |
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| 253 | QString inputMask() const { return m_maskData ? m_inputMask + QLatin1Char(';') + m_blank : QString(); }
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| 254 | void setInputMask(const QString &mask)
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| 255 | {
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| 256 | parseInputMask(mask);
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| 257 | if (m_maskData)
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| 258 | moveCursor(nextMaskBlank(0));
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| 259 | }
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| 260 |
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| 261 | // input methods
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| 262 | #ifndef QT_NO_IM
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| 263 | bool composeMode() const { return !m_textLayout.preeditAreaText().isEmpty(); }
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| 264 | void setPreeditArea(int cursor, const QString &text) { m_textLayout.setPreeditArea(cursor, text); }
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| 265 | #endif
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| 266 |
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| 267 | QString preeditAreaText() const { return m_textLayout.preeditAreaText(); }
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| 268 |
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| 269 | void updatePasswordEchoEditing(bool editing);
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| 270 | bool passwordEchoEditing() const { return m_passwordEchoEditing; }
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| 271 |
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| 272 | QChar passwordCharacter() const { return m_passwordCharacter; }
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| 273 | void setPasswordCharacter(const QChar &character) { m_passwordCharacter = character; updateDisplayText(); }
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| 274 |
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| 275 | Qt::LayoutDirection layoutDirection() const {
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| 276 | if (m_layoutDirection == Qt::LayoutDirectionAuto) {
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| 277 | if (m_text.isEmpty())
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| 278 | return QApplication::keyboardInputDirection();
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| 279 | return m_text.isRightToLeft() ? Qt::RightToLeft : Qt::LeftToRight;
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| 280 | }
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| 281 | return m_layoutDirection;
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| 282 | }
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| 283 | void setLayoutDirection(Qt::LayoutDirection direction)
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| 284 | {
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| 285 | if (direction != m_layoutDirection) {
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| 286 | m_layoutDirection = direction;
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| 287 | updateDisplayText();
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| 288 | }
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| 289 | }
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| 290 |
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| 291 | void setFont(const QFont &font) { m_textLayout.setFont(font); updateDisplayText(); }
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| 292 |
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| 293 | void processInputMethodEvent(QInputMethodEvent *event);
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| 294 | void processMouseEvent(QMouseEvent* ev);
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| 295 | void processKeyEvent(QKeyEvent* ev);
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| 296 |
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| 297 | int cursorBlinkPeriod() const { return m_blinkPeriod; }
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| 298 | void setCursorBlinkPeriod(int msec);
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| 299 | void resetCursorBlinkTimer();
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| 300 |
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| 301 | QString cancelText() const { return m_cancelText; }
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| 302 | void setCancelText(const QString &text) { m_cancelText = text; }
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| 303 |
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| 304 | const QPalette &palette() const { return m_palette; }
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| 305 | void setPalette(const QPalette &p) { m_palette = p; }
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| 306 |
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| 307 | enum DrawFlags {
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| 308 | DrawText = 0x01,
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| 309 | DrawSelections = 0x02,
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| 310 | DrawCursor = 0x04,
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| 311 | DrawAll = DrawText | DrawSelections | DrawCursor
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| 312 | };
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| 313 | void draw(QPainter *, const QPoint &, const QRect &, int flags = DrawAll);
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| 314 |
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| 315 | bool processEvent(QEvent *ev);
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| 316 |
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| 317 | private:
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| 318 | void init(const QString &txt);
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| 319 | void removeSelectedText();
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| 320 | void internalSetText(const QString &txt, int pos = -1, bool edited = true);
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| 321 | void updateDisplayText(bool forceUpdate = false);
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| 322 |
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| 323 | void internalInsert(const QString &s);
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| 324 | void internalDelete(bool wasBackspace = false);
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| 325 | void internalRemove(int pos);
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| 326 |
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| 327 | inline void internalDeselect()
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| 328 | {
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| 329 | m_selDirty |= (m_selend > m_selstart);
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| 330 | m_selstart = m_selend = 0;
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| 331 | }
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| 332 |
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| 333 | void internalUndo(int until = -1);
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| 334 | void internalRedo();
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| 335 |
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| 336 | QString m_text;
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| 337 | QPalette m_palette;
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| 338 | int m_cursor;
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| 339 | int m_preeditCursor;
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| 340 | int m_cursorWidth;
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| 341 | Qt::LayoutDirection m_layoutDirection;
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| 342 | uint m_hideCursor : 1; // used to hide the m_cursor inside preedit areas
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| 343 | uint m_separator : 1;
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| 344 | uint m_readOnly : 1;
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| 345 | uint m_dragEnabled : 1;
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| 346 | uint m_echoMode : 2;
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| 347 | uint m_textDirty : 1;
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| 348 | uint m_selDirty : 1;
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| 349 | uint m_validInput : 1;
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| 350 | uint m_blinkStatus : 1;
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| 351 | int m_blinkPeriod; // 0 for non-blinking cursor
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| 352 | int m_blinkTimer;
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| 353 | int m_deleteAllTimer;
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| 354 | int m_ascent;
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| 355 | int m_maxLength;
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| 356 | int m_lastCursorPos;
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| 357 | QList<int> m_transactions;
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| 358 | QPoint m_tripleClick;
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| 359 | int m_tripleClickTimer;
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| 360 | QString m_cancelText;
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| 361 |
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| 362 | void emitCursorPositionChanged();
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| 363 |
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| 364 | bool finishChange(int validateFromState = -1, bool update = false, bool edited = true);
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| 365 |
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| 366 | #ifndef QT_NO_VALIDATOR
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| 367 | QPointer<QValidator> m_validator;
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| 368 | #endif
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| 369 | QPointer<QCompleter> m_completer;
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| 370 | #ifndef QT_NO_COMPLETER
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| 371 | bool advanceToEnabledItem(int dir);
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| 372 | #endif
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| 373 |
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| 374 | struct MaskInputData {
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| 375 | enum Casemode { NoCaseMode, Upper, Lower };
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| 376 | QChar maskChar; // either the separator char or the inputmask
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| 377 | bool separator;
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| 378 | Casemode caseMode;
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| 379 | };
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| 380 | QString m_inputMask;
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| 381 | QChar m_blank;
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| 382 | MaskInputData *m_maskData;
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| 383 |
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| 384 | // undo/redo handling
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| 385 | enum CommandType { Separator, Insert, Remove, Delete, RemoveSelection, DeleteSelection, SetSelection };
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| 386 | struct Command {
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| 387 | inline Command() {}
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| 388 | inline Command(CommandType t, int p, QChar c, int ss, int se) : type(t),uc(c),pos(p),selStart(ss),selEnd(se) {}
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| 389 | uint type : 4;
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| 390 | QChar uc;
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| 391 | int pos, selStart, selEnd;
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| 392 | };
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| 393 | int m_modifiedState;
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| 394 | int m_undoState;
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| 395 | QVector<Command> m_history;
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| 396 | void addCommand(const Command& cmd);
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| 397 |
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| 398 | inline void separate() { m_separator = true; }
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| 399 |
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| 400 | // selection
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| 401 | int m_selstart;
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| 402 | int m_selend;
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| 403 |
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| 404 | // masking
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| 405 | void parseInputMask(const QString &maskFields);
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| 406 | bool isValidInput(QChar key, QChar mask) const;
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| 407 | bool hasAcceptableInput(const QString &text) const;
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|---|
| 408 | QString maskString(uint pos, const QString &str, bool clear = false) const;
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| 409 | QString clearString(uint pos, uint len) const;
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|---|
| 410 | QString stripString(const QString &str) const;
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|---|
| 411 | int findInMask(int pos, bool forward, bool findSeparator, QChar searchChar = QChar()) const;
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| 412 |
|
|---|
| 413 | // complex text layout
|
|---|
| 414 | QTextLayout m_textLayout;
|
|---|
| 415 |
|
|---|
| 416 | bool m_passwordEchoEditing;
|
|---|
| 417 | QChar m_passwordCharacter;
|
|---|
| 418 |
|
|---|
| 419 | Q_SIGNALS:
|
|---|
| 420 | void cursorPositionChanged(int, int);
|
|---|
| 421 | void selectionChanged();
|
|---|
| 422 |
|
|---|
| 423 | void displayTextChanged(const QString &);
|
|---|
| 424 | void textChanged(const QString &);
|
|---|
| 425 | void textEdited(const QString &);
|
|---|
| 426 |
|
|---|
| 427 | void resetInputContext();
|
|---|
| 428 |
|
|---|
| 429 | void accepted();
|
|---|
| 430 | void editingFinished();
|
|---|
| 431 | void updateNeeded(const QRect &);
|
|---|
| 432 |
|
|---|
| 433 | #ifdef QT_KEYPAD_NAVIGATION
|
|---|
| 434 | void editFocusChange(bool);
|
|---|
| 435 | #endif
|
|---|
| 436 | protected:
|
|---|
| 437 | virtual void timerEvent(QTimerEvent *event);
|
|---|
| 438 |
|
|---|
| 439 | private Q_SLOTS:
|
|---|
| 440 | void _q_clipboardChanged();
|
|---|
| 441 | void _q_deleteSelected();
|
|---|
| 442 |
|
|---|
| 443 | };
|
|---|
| 444 |
|
|---|
| 445 | QT_END_NAMESPACE
|
|---|
| 446 |
|
|---|
| 447 | QT_END_HEADER
|
|---|
| 448 |
|
|---|
| 449 | #endif // QT_NO_LINEEDIT
|
|---|
| 450 |
|
|---|
| 451 | #endif // QLINECONTROL_P_H
|
|---|
