/***********************************************************************************
 *                                                                                 *
 * Voreen - The Volume Rendering Engine                                            *
 *                                                                                 *
 * Copyright (C) 2005-2012 University of Muenster, Germany.                        *
 * Visualization and Computer Graphics Group <http://viscg.uni-muenster.de>        *
 * For a list of authors please refer to the file "CREDITS.txt".                   *
 *                                                                                 *
 * This file is part of the Voreen software package. Voreen is free software:      *
 * you can redistribute it and/or modify it under the terms of the GNU General     *
 * Public License version 2 as published by the Free Software Foundation.          *
 *                                                                                 *
 * Voreen is distributed in the hope that it will be useful, but WITHOUT ANY       *
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR   *
 * A PARTICULAR PURPOSE. See the GNU General Public License for more details.      *
 *                                                                                 *
 * You should have received a copy of the GNU General Public License in the file   *
 * "LICENSE.txt" along with this file. If not, see <http://www.gnu.org/licenses/>. *
 *                                                                                 *
 * For non-commercial academic use see the license exception specified in the file *
 * "LICENSE-academic.txt". To get information about commercial licensing please    *
 * contact the authors.                                                            *
 *                                                                                 *
 ***********************************************************************************/

#include "voreen/qt/widgets/lineeditresetwidget.h"

#include <QStyle>
#include <QToolButton>

namespace voreen {

LineEditResetWidget::LineEditResetWidget(QWidget* parent)
    : QLineEdit(parent)
{
    clearButton_ = new QToolButton(this);
    QPixmap pixmap(":/qt/icons/input-reset.png");
    clearButton_->setIcon(QIcon(pixmap));
    clearButton_->setStyleSheet("QToolButton { border: none; padding: 3px; }");
    clearButton_->setCursor(Qt::ArrowCursor);
    clearButton_->hide();
    clearButton_->move(20,0);
    connect(clearButton_, SIGNAL(clicked()), this, SLOT(clear()));
    connect(this, SIGNAL(textChanged(const QString&)), this, SLOT(updateClearButton(const QString&)));
}

void LineEditResetWidget::resizeEvent(QResizeEvent*){
    QSize size = clearButton_->sizeHint();
    int frameWidth = style()->pixelMetric(QStyle::PM_DefaultFrameWidth);
    clearButton_->move(rect().right()- frameWidth - size.width(), (rect().bottom() + 1 - size.height())/2);
}

void LineEditResetWidget::updateClearButton(const QString &text){
    clearButton_->setVisible(!text.isEmpty());
}

} //namespace voreen
