2011-04-27 10:05:43 +00:00
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/****************************************************************************
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**
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2016-01-22 12:24:00 +00:00
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** Copyright (C) 2016 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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2011-04-27 10:05:43 +00:00
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**
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** This file is part of the examples of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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2016-01-22 12:24:00 +00:00
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** BSD License Usage
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** Alternatively, you may use this file under the terms of the BSD license
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** as follows:
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2011-04-27 10:05:43 +00:00
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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2015-02-13 11:15:33 +00:00
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** * Neither the name of The Qt Company Ltd nor the names of its
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** contributors may be used to endorse or promote products derived
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** from this software without specific prior written permission.
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2012-09-19 12:28:29 +00:00
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**
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2011-04-27 10:05:43 +00:00
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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2012-01-24 06:17:24 +00:00
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**
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2011-04-27 10:05:43 +00:00
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "textedit.h"
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#include <QCompleter>
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#include <QKeyEvent>
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#include <QAbstractItemView>
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#include <QtDebug>
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#include <QApplication>
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#include <QModelIndex>
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#include <QAbstractItemModel>
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#include <QScrollBar>
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//! [0]
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TextEdit::TextEdit(QWidget *parent)
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2019-09-06 18:27:33 +00:00
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: QTextEdit(parent)
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2011-04-27 10:05:43 +00:00
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{
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setPlainText(tr("This TextEdit provides autocompletions for words that have more than"
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2013-03-14 23:42:15 +00:00
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" 3 characters. You can trigger autocompletion using ") +
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2011-04-27 10:05:43 +00:00
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QKeySequence("Ctrl+E").toString(QKeySequence::NativeText));
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}
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//! [0]
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//! [1]
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TextEdit::~TextEdit()
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{
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}
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//! [1]
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//! [2]
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void TextEdit::setCompleter(QCompleter *completer)
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{
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if (c)
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2019-09-06 18:27:33 +00:00
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c->disconnect(this);
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2011-04-27 10:05:43 +00:00
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c = completer;
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if (!c)
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return;
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c->setWidget(this);
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c->setCompletionMode(QCompleter::PopupCompletion);
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c->setCaseSensitivity(Qt::CaseInsensitive);
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2018-12-07 13:17:38 +00:00
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QObject::connect(c, QOverload<const QString &>::of(&QCompleter::activated),
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this, &TextEdit::insertCompletion);
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2011-04-27 10:05:43 +00:00
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}
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//! [2]
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//! [3]
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QCompleter *TextEdit::completer() const
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{
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return c;
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}
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//! [3]
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//! [4]
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2019-09-06 18:27:33 +00:00
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void TextEdit::insertCompletion(const QString &completion)
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2011-04-27 10:05:43 +00:00
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{
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if (c->widget() != this)
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return;
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QTextCursor tc = textCursor();
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int extra = completion.length() - c->completionPrefix().length();
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tc.movePosition(QTextCursor::Left);
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tc.movePosition(QTextCursor::EndOfWord);
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tc.insertText(completion.right(extra));
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setTextCursor(tc);
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}
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//! [4]
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//! [5]
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QString TextEdit::textUnderCursor() const
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{
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QTextCursor tc = textCursor();
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tc.select(QTextCursor::WordUnderCursor);
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return tc.selectedText();
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}
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//! [5]
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//! [6]
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void TextEdit::focusInEvent(QFocusEvent *e)
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{
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if (c)
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c->setWidget(this);
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QTextEdit::focusInEvent(e);
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}
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//! [6]
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//! [7]
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void TextEdit::keyPressEvent(QKeyEvent *e)
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{
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if (c && c->popup()->isVisible()) {
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// The following keys are forwarded by the completer to the widget
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switch (e->key()) {
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case Qt::Key_Enter:
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case Qt::Key_Return:
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case Qt::Key_Escape:
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case Qt::Key_Tab:
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case Qt::Key_Backtab:
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2013-03-14 23:42:15 +00:00
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e->ignore();
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2011-04-27 10:05:43 +00:00
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return; // let the completer do default behavior
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default:
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break;
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}
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}
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2019-09-06 18:27:33 +00:00
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const bool isShortcut = (e->modifiers().testFlag(Qt::ControlModifier) && e->key() == Qt::Key_E); // CTRL+E
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2011-04-27 10:05:43 +00:00
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if (!c || !isShortcut) // do not process the shortcut when we have a completer
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QTextEdit::keyPressEvent(e);
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//! [7]
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//! [8]
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2019-09-06 18:27:33 +00:00
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const bool ctrlOrShift = e->modifiers().testFlag(Qt::ControlModifier) ||
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e->modifiers().testFlag(Qt::ShiftModifier);
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2011-04-27 10:05:43 +00:00
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if (!c || (ctrlOrShift && e->text().isEmpty()))
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return;
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static QString eow("~!@#$%^&*()_+{}|:\"<>?,./;'[]\\-="); // end of word
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2019-09-06 18:27:33 +00:00
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const bool hasModifier = (e->modifiers() != Qt::NoModifier) && !ctrlOrShift;
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2011-04-27 10:05:43 +00:00
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QString completionPrefix = textUnderCursor();
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2013-03-14 23:42:15 +00:00
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if (!isShortcut && (hasModifier || e->text().isEmpty()|| completionPrefix.length() < 3
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2011-04-27 10:05:43 +00:00
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|| eow.contains(e->text().right(1)))) {
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c->popup()->hide();
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return;
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}
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if (completionPrefix != c->completionPrefix()) {
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c->setCompletionPrefix(completionPrefix);
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c->popup()->setCurrentIndex(c->completionModel()->index(0, 0));
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}
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QRect cr = cursorRect();
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cr.setWidth(c->popup()->sizeHintForColumn(0)
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+ c->popup()->verticalScrollBar()->sizeHint().width());
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c->complete(cr); // popup it up!
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}
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//! [8]
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