|
1 /**************************************************************************** |
|
2 ** |
|
3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). |
|
4 ** All rights reserved. |
|
5 ** Contact: Nokia Corporation (qt-info@nokia.com) |
|
6 ** |
|
7 ** This file is part of the examples of the Qt Toolkit. |
|
8 ** |
|
9 ** $QT_BEGIN_LICENSE:LGPL$ |
|
10 ** No Commercial Usage |
|
11 ** This file contains pre-release code and may not be distributed. |
|
12 ** You may use this file in accordance with the terms and conditions |
|
13 ** contained in the Technology Preview License Agreement accompanying |
|
14 ** this package. |
|
15 ** |
|
16 ** GNU Lesser General Public License Usage |
|
17 ** Alternatively, this file may be used under the terms of the GNU Lesser |
|
18 ** General Public License version 2.1 as published by the Free Software |
|
19 ** Foundation and appearing in the file LICENSE.LGPL included in the |
|
20 ** packaging of this file. Please review the following information to |
|
21 ** ensure the GNU Lesser General Public License version 2.1 requirements |
|
22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
|
23 ** |
|
24 ** In addition, as a special exception, Nokia gives you certain additional |
|
25 ** rights. These rights are described in the Nokia Qt LGPL Exception |
|
26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
|
27 ** |
|
28 ** If you have questions regarding the use of this file, please contact |
|
29 ** Nokia at qt-info@nokia.com. |
|
30 ** |
|
31 ** |
|
32 ** |
|
33 ** |
|
34 ** |
|
35 ** |
|
36 ** |
|
37 ** |
|
38 ** $QT_END_LICENSE$ |
|
39 ** |
|
40 ****************************************************************************/ |
|
41 |
|
42 #include "textedit.h" |
|
43 #include <QCompleter> |
|
44 #include <QKeyEvent> |
|
45 #include <QAbstractItemView> |
|
46 #include <QtDebug> |
|
47 #include <QApplication> |
|
48 #include <QModelIndex> |
|
49 #include <QAbstractItemModel> |
|
50 #include <QScrollBar> |
|
51 |
|
52 //! [0] |
|
53 TextEdit::TextEdit(QWidget *parent) |
|
54 : QTextEdit(parent), c(0) |
|
55 { |
|
56 setPlainText(tr("This TextEdit provides autocompletions for words that have more than" |
|
57 " 3 characters. You can trigger autocompletion using ") + |
|
58 QKeySequence("Ctrl+E").toString(QKeySequence::NativeText)); |
|
59 } |
|
60 //! [0] |
|
61 |
|
62 //! [1] |
|
63 TextEdit::~TextEdit() |
|
64 { |
|
65 } |
|
66 //! [1] |
|
67 |
|
68 //! [2] |
|
69 void TextEdit::setCompleter(QCompleter *completer) |
|
70 { |
|
71 if (c) |
|
72 QObject::disconnect(c, 0, this, 0); |
|
73 |
|
74 c = completer; |
|
75 |
|
76 if (!c) |
|
77 return; |
|
78 |
|
79 c->setWidget(this); |
|
80 c->setCompletionMode(QCompleter::PopupCompletion); |
|
81 c->setCaseSensitivity(Qt::CaseInsensitive); |
|
82 QObject::connect(c, SIGNAL(activated(const QString&)), |
|
83 this, SLOT(insertCompletion(const QString&))); |
|
84 } |
|
85 //! [2] |
|
86 |
|
87 //! [3] |
|
88 QCompleter *TextEdit::completer() const |
|
89 { |
|
90 return c; |
|
91 } |
|
92 //! [3] |
|
93 |
|
94 //! [4] |
|
95 void TextEdit::insertCompletion(const QString& completion) |
|
96 { |
|
97 if (c->widget() != this) |
|
98 return; |
|
99 QTextCursor tc = textCursor(); |
|
100 int extra = completion.length() - c->completionPrefix().length(); |
|
101 tc.movePosition(QTextCursor::Left); |
|
102 tc.movePosition(QTextCursor::EndOfWord); |
|
103 tc.insertText(completion.right(extra)); |
|
104 setTextCursor(tc); |
|
105 } |
|
106 //! [4] |
|
107 |
|
108 //! [5] |
|
109 QString TextEdit::textUnderCursor() const |
|
110 { |
|
111 QTextCursor tc = textCursor(); |
|
112 tc.select(QTextCursor::WordUnderCursor); |
|
113 return tc.selectedText(); |
|
114 } |
|
115 //! [5] |
|
116 |
|
117 //! [6] |
|
118 void TextEdit::focusInEvent(QFocusEvent *e) |
|
119 { |
|
120 if (c) |
|
121 c->setWidget(this); |
|
122 QTextEdit::focusInEvent(e); |
|
123 } |
|
124 //! [6] |
|
125 |
|
126 //! [7] |
|
127 void TextEdit::keyPressEvent(QKeyEvent *e) |
|
128 { |
|
129 if (c && c->popup()->isVisible()) { |
|
130 // The following keys are forwarded by the completer to the widget |
|
131 switch (e->key()) { |
|
132 case Qt::Key_Enter: |
|
133 case Qt::Key_Return: |
|
134 case Qt::Key_Escape: |
|
135 case Qt::Key_Tab: |
|
136 case Qt::Key_Backtab: |
|
137 e->ignore(); |
|
138 return; // let the completer do default behavior |
|
139 default: |
|
140 break; |
|
141 } |
|
142 } |
|
143 |
|
144 bool isShortcut = ((e->modifiers() & Qt::ControlModifier) && e->key() == Qt::Key_E); // CTRL+E |
|
145 if (!c || !isShortcut) // dont process the shortcut when we have a completer |
|
146 QTextEdit::keyPressEvent(e); |
|
147 //! [7] |
|
148 |
|
149 //! [8] |
|
150 const bool ctrlOrShift = e->modifiers() & (Qt::ControlModifier | Qt::ShiftModifier); |
|
151 if (!c || (ctrlOrShift && e->text().isEmpty())) |
|
152 return; |
|
153 |
|
154 static QString eow("~!@#$%^&*()_+{}|:\"<>?,./;'[]\\-="); // end of word |
|
155 bool hasModifier = (e->modifiers() != Qt::NoModifier) && !ctrlOrShift; |
|
156 QString completionPrefix = textUnderCursor(); |
|
157 |
|
158 if (!isShortcut && (hasModifier || e->text().isEmpty()|| completionPrefix.length() < 3 |
|
159 || eow.contains(e->text().right(1)))) { |
|
160 c->popup()->hide(); |
|
161 return; |
|
162 } |
|
163 |
|
164 if (completionPrefix != c->completionPrefix()) { |
|
165 c->setCompletionPrefix(completionPrefix); |
|
166 c->popup()->setCurrentIndex(c->completionModel()->index(0, 0)); |
|
167 } |
|
168 QRect cr = cursorRect(); |
|
169 cr.setWidth(c->popup()->sizeHintForColumn(0) |
|
170 + c->popup()->verticalScrollBar()->sizeHint().width()); |
|
171 c->complete(cr); // popup it up! |
|
172 } |
|
173 //! [8] |
|
174 |