float_edit.cpp

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/*
 * Copyright (c) 2012, Willow Garage, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the Willow Garage, Inc. nor the names of its
 *       contributors may be used to endorse or promote products derived from
 *       this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <QDoubleValidator>
#include <QLocale>

#include "rviz/properties/float_edit.h"

namespace rviz
{

FloatEdit::FloatEdit( QWidget* parent )
  : QLineEdit( parent )
{
  setFrame( false );
  setValidator( new QDoubleValidator( this ));
  connect( this, SIGNAL( textEdited( const QString& )), this, SLOT( updateValue() ));
}

void FloatEdit::setValue( float new_value )
{
  if( value_ != new_value )
  {
    QLocale locale;
    value_ = new_value;
    bool ok = true;
    float existing_text_value = locale.toFloat(text(), &ok );
    if( !ok || existing_text_value != new_value )
    {
      setText( locale.toString((double) value_ ));
    }
  }
}

void FloatEdit::updateValue()
{
  if( hasAcceptableInput() )
  {
    bool ok = true;
    float new_value = QLocale().toFloat(text(), &ok );
    if( ok )
    {
      setValue( new_value );
    }
  }
}

} // end namespace rviz