color_property.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
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 */

#include <QPainter>
#include <QStringList>
#include <QStyleOptionViewItem>

#include "rviz/properties/parse_color.h"
#include "rviz/properties/color_property.h"
#include "rviz/properties/color_editor.h"
#include "rviz/properties/property_tree_model.h"

namespace rviz
{
ColorProperty::ColorProperty(const QString& name,
                             const QColor& default_value,
                             const QString& description,
                             Property* parent,
                             const char* changed_slot,
                             QObject* receiver)
  : Property(name, QVariant(), description, parent, changed_slot, receiver), color_(default_value)
{
  updateString();
}

bool ColorProperty::setColor(const QColor& new_color)
{
  if (new_color != color_)
  {
    Q_EMIT aboutToChange();
    color_ = new_color;
    updateString();
    Q_EMIT changed();
    if (model_)
      model_->emitDataChanged(this);
    return true;
  }
  return false;
}

bool ColorProperty::setValue(const QVariant& new_value)
{
  if (new_value.type() == QVariant::Color)
  {
    return setColor(new_value.value<QColor>());
  }

  QColor new_color = parseColor(new_value.toString());
  if (new_color.isValid())
  {
    return setColor(new_color);
  }
  return false;
}

void ColorProperty::updateString()
{
  value_ = printColor(color_);
}

bool ColorProperty::paint(QPainter* painter, const QStyleOptionViewItem& option) const
{
  painter->save();
  QColor color = color_;
  if (!(getViewFlags(0) & Qt::ItemIsEnabled))
  {
    color = QColor(200, 200, 200);
    painter->setPen(QColor(Qt::lightGray));
  }
  QString text = value_.toString();
  QRect rect = option.rect;
  ColorEditor::paintColorBox(painter, rect, color);
  rect.adjust(rect.height() + 4, 1, 0, 0);
  painter->drawText(rect, text);

  painter->restore();

  return true; // return true, since this function has done the painting.
}

QWidget* ColorProperty::createEditor(QWidget* parent, const QStyleOptionViewItem& /*option*/)
{
  ColorEditor* editor = new ColorEditor(this, parent);
  editor->setFrame(false);
  return editor;
}

} // end namespace rviz