//  SuperTux
//  Copyright (C) 2006 Matthias Braun <matze@braunis.de>
//
//  This program is free software: you can redistribute it and/or modify
//  it under the terms of the GNU General Public License as published by
//  the Free Software Foundation, either version 3 of the License, or
//  (at your option) any later version.
//
//  This program 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
//  along with this program.  If not, see <http://www.gnu.org/licenses/>.

#include "object/floating_image.hpp"

#include "sprite/sprite.hpp"
#include "sprite/sprite_manager.hpp"
#include "supertux/globals.hpp"

FloatingImage::FloatingImage(const std::string& spritefile) :
  sprite(SpriteManager::current()->create(spritefile)),
  layer(LAYER_FOREGROUND1 + 1),
  visible(false),
  anchor(ANCHOR_MIDDLE),
  pos(0.0f, 0.0f),
  fading(0),
  fadetime(0)
{
}

FloatingImage::~FloatingImage()
{
}

void
FloatingImage::update(float dt_sec)
{
  if (fading > 0) {
    fading -= dt_sec;
    if (fading <= 0) {
      fading = 0;
      visible = true;
    }
  } else if (fading < 0) {
    fading += dt_sec;
    if (fading >= 0) {
      fading = 0;
      visible = false;
    }
  }
}

void
FloatingImage::set_action(const std::string& action)
{
  sprite->set_action(action);
}

std::string
FloatingImage::get_action()
{
  return sprite->get_action();
}

void
FloatingImage::fade_in(float fadetime_)
{
  fadetime = fadetime_;
  fading = fadetime_;
}

void
FloatingImage::fade_out(float fadetime_)
{
  fadetime = fadetime_;
  fading = -fadetime_;
}

void
FloatingImage::draw(DrawingContext& context)
{
  context.push_transform();
  context.set_translation(Vector(0, 0));

  if (fading > 0) {
    context.set_alpha((fadetime-fading) / fadetime);
  } else if (fading < 0) {
    context.set_alpha(-fading / fadetime);
  } else if (!visible) {
    context.pop_transform();
    return;
  }

  Vector spos = pos + get_anchor_pos(Rectf(0, 0,
                                           static_cast<float>(context.get_width()),
                                           static_cast<float>(context.get_height())),
                                     static_cast<float>(sprite->get_width()),
                                     static_cast<float>(sprite->get_height()),
                                     anchor);

  sprite->draw(context.color(), spos, layer);

  context.pop_transform();
}

/* EOF */
