propertylineedit.cpp

来自「奇趣公司比较新的qt/emd版本」· C++ 代码 · 共 89 行

/****************************************************************************
**
** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
**
** This file is part of the Qt Designer of the Qt Toolkit.
**
** This file may be used under the terms of the GNU General Public
** License version 2.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of
** this file.  Please review the following information to ensure GNU
** General Public Licensing requirements will be met:
** http://trolltech.com/products/qt/licenses/licensing/opensource/
**
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
** or contact the sales department at [e-mail].
**
** In addition, as a special exception, Trolltech gives you certain
** additional rights. These rights are described in the Trolltech GPL
** Exception version 1.0, which can be found at
** http://www.trolltech.com/products/qt/gplexception/ and in the file
** GPL_EXCEPTION.txt in this package.
**
** In addition, as a special exception, Trolltech, as the sole copyright
** holder for Qt Designer, grants users of the Qt/Eclipse Integration
** plug-in the right for the Qt/Eclipse Integration to link to
** functionality provided by Qt Designer and its related libraries.
**
** Trolltech reserves all rights not expressly granted herein.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
****************************************************************************/

#include "propertylineedit_p.h"

#include <QtGui/QContextMenuEvent>
#include <QtGui/QKeyEvent>
#include <QtGui/QMenu>

namespace qdesigner_internal {
    PropertyLineEdit::PropertyLineEdit(QWidget *parent, bool wantNewLine) :
        QLineEdit(parent), m_wantNewLine(wantNewLine)
    {
    }

    bool PropertyLineEdit::event(QEvent *e)
    {
        // handle 'Select all' here as it is not done in the QLineEdit
        if (e->type() == QEvent::ShortcutOverride && !isReadOnly()) {
            QKeyEvent* ke = static_cast<QKeyEvent*> (e);
            if (ke->modifiers() & Qt::ControlModifier) {
                if(ke->key() == Qt::Key_A) {
                    ke->accept();
                    return true;
                }
            }
        }
        return QLineEdit::event(e);
    }

    void PropertyLineEdit::insertNewLine() {
        insertText(QLatin1String("\\n"));
    }

    void PropertyLineEdit::insertText(const QString &text) {
        // position cursor after new text and grab focus
        const int oldCursorPosition = cursorPosition ();
        insert(text);
        setCursorPosition (oldCursorPosition + text.length());
        setFocus(Qt::OtherFocusReason);
    }

    void PropertyLineEdit::contextMenuEvent(QContextMenuEvent *event) {
        QMenu  *menu = createStandardContextMenu ();

        if (m_wantNewLine) {
            menu->addSeparator();
            QAction* nlAction = menu->addAction(tr("Insert line break"));
            connect(nlAction, SIGNAL(triggered()), this, SLOT(insertNewLine()));
        }

        menu->exec(event->globalPos());
    }
}