05fc3aef53
Replace the current license disclaimer in files by a SPDX-License-Identifier. Files that have to be modified by hand are modified. License files are organized under LICENSES directory. Task-number: QTBUG-67283 Change-Id: Id880c92784c40f3bbde861c0d93f58151c18b9f1 Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org> Reviewed-by: Lars Knoll <lars.knoll@qt.io> Reviewed-by: Jörg Bornemann <joerg.bornemann@qt.io>
138 lines
3.5 KiB
C++
138 lines
3.5 KiB
C++
// Copyright (C) 2016 The Qt Company Ltd.
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// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
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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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: QTextEdit(parent)
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{
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setPlainText(tr("This TextEdit provides autocompletions for words that have more than"
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" 3 characters. You can trigger autocompletion using ") +
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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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c->disconnect(this);
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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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QObject::connect(c, QOverload<const QString &>::of(&QCompleter::activated),
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this, &TextEdit::insertCompletion);
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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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void TextEdit::insertCompletion(const QString &completion)
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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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e->ignore();
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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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const bool isShortcut = (e->modifiers().testFlag(Qt::ControlModifier) && e->key() == Qt::Key_E); // CTRL+E
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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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const bool ctrlOrShift = e->modifiers().testFlag(Qt::ControlModifier) ||
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e->modifiers().testFlag(Qt::ShiftModifier);
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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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const bool hasModifier = (e->modifiers() != Qt::NoModifier) && !ctrlOrShift;
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QString completionPrefix = textUnderCursor();
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if (!isShortcut && (hasModifier || e->text().isEmpty()|| completionPrefix.length() < 3
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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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