1// Copyright (C) 2016 The Qt Company Ltd.
2// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
3
4/*! \class TextEditFindWidget
5
6 \brief A search bar that is commonly added below the searchable text.
7
8 \internal
9
10 This widget implements a search bar which becomes visible when the user
11 wants to start searching. It is a modern replacement for the commonly used
12 search dialog. It is usually placed below a QTextEdit using a QVBoxLayout.
13
14 The QTextEdit instance will need to be associated with this class using
15 setTextEdit().
16
17 The search is incremental and can be set to case sensitive or whole words
18 using buttons available on the search bar.
19
20 \sa QTextEdit
21 */
22
23#include "texteditfindwidget_p.h"
24
25#include <QtWidgets/QCheckBox>
26#include <QtGui/QTextCursor>
27#include <QtWidgets/QTextEdit>
28
29QT_BEGIN_NAMESPACE
30
31/*!
32 Constructs a TextEditFindWidget.
33
34 \a flags is passed to the AbstractFindWidget constructor.
35 \a parent is passed to the QWidget constructor.
36 */
37TextEditFindWidget::TextEditFindWidget(FindFlags flags, QWidget *parent)
38 : AbstractFindWidget(flags, parent)
39 , m_textEdit(0)
40{
41}
42
43/*!
44 Associates a QTextEdit with this find widget. Searches done using this find
45 widget will then apply to the given QTextEdit.
46
47 An event filter is set on the QTextEdit which intercepts the ESC key while
48 the find widget is active, and uses it to deactivate the find widget.
49
50 If the find widget is already associated with a QTextEdit, the event filter
51 is removed from this QTextEdit first.
52
53 \a textEdit may be NULL.
54 */
55void TextEditFindWidget::setTextEdit(QTextEdit *textEdit)
56{
57 if (m_textEdit)
58 m_textEdit->removeEventFilter(obj: this);
59
60 m_textEdit = textEdit;
61
62 if (m_textEdit)
63 m_textEdit->installEventFilter(filterObj: this);
64}
65
66/*!
67 \reimp
68 */
69void TextEditFindWidget::deactivate()
70{
71 // Pass focus to the text edit
72 if (m_textEdit)
73 m_textEdit->setFocus();
74
75 AbstractFindWidget::deactivate();
76}
77
78/*!
79 \reimp
80 */
81void TextEditFindWidget::find(const QString &ttf, bool skipCurrent, bool backward, bool *found, bool *wrapped)
82{
83 if (!m_textEdit)
84 return;
85
86 QTextCursor cursor = m_textEdit->textCursor();
87 QTextDocument *doc = m_textEdit->document();
88
89 if (!doc || cursor.isNull())
90 return;
91
92 if (cursor.hasSelection())
93 cursor.setPosition(pos: (skipCurrent && !backward) ? cursor.position() : cursor.anchor());
94
95 *found = true;
96 QTextCursor newCursor = cursor;
97
98 if (!ttf.isEmpty()) {
99 QTextDocument::FindFlags options;
100
101 if (backward)
102 options |= QTextDocument::FindBackward;
103
104 if (caseSensitive())
105 options |= QTextDocument::FindCaseSensitively;
106
107 if (wholeWords())
108 options |= QTextDocument::FindWholeWords;
109
110 newCursor = doc->find(subString: ttf, cursor, options);
111 if (newCursor.isNull()) {
112 QTextCursor ac(doc);
113 ac.movePosition(op: options & QTextDocument::FindBackward
114 ? QTextCursor::End : QTextCursor::Start);
115 newCursor = doc->find(subString: ttf, cursor: ac, options);
116 if (newCursor.isNull()) {
117 *found = false;
118 newCursor = cursor;
119 } else {
120 *wrapped = true;
121 }
122 }
123 }
124
125 if (!isVisible())
126 show();
127
128 m_textEdit->setTextCursor(newCursor);
129}
130
131QT_END_NAMESPACE
132

source code of qttools/src/shared/findwidget/texteditfindwidget.cpp