callback hell

animated_scrolling_text.cpp

  this->player.run_action(scroll_right, [=]() {

    this->expected_queue_size(0);
    EXPECT_EQ( Point2i(200,195), anim_text->position() );

    this->expected_alpha_in_params( anim_fade_in.get(),
                                    Color4i::ALPHA_OPAQUE, anim_fade_tex );
    this->expected_action_params( scroll_right.get(),
                                  IAnimationAction::AnimationType::GROUP, 2);

    this->player.run_action(scroll_left, [=]() {

      this->expected_queue_size(0);
      EXPECT_EQ( Point2i(0,195), anim_text->position() );
      EXPECT_EQ( Color4i::ALPHA_OPAQUE, anim_fade_tex->alpha() );

      this->expected_reversed_params( scroll_left_inversed.get(),
                                      2.5f, SPEED_MOD );
      this->expected_action_params( scroll_left.get(),
                                    IAnimationAction::AnimationType::SEQUENCE,
                                    1 );

      this->player.run_action(scroll_right_again, [=]() {

        this->expected_queue_size(0);
        EXPECT_EQ( Point2i(200,195), anim_text->position() );
        EXPECT_EQ( Color4i::ALPHA_OPAQUE, anim_fade_tex->alpha() );

        this->expected_action_params( scroll_right_again.get(),
                                      IAnimationAction::AnimationType::GROUP, 1);

        this->player.run_action(scroll_up, [=]() {

          this->expected_queue_size(0);
          EXPECT_EQ( Point2i(200,-105), anim_text->position() );

          this->expected_alpha_out_params(  anim_fade_out0.get(),
                                            Color4i::ALPHA_TRANSPARENT,
                                            anim_fade_tex );
          this->expected_action_params( scroll_up.get(),
                                        IAnimationAction::AnimationType::GROUP,
                                        2 );

          // Reset the initial alpha value for the next action to re-use
          anim_fade_tex->set_alpha(Color4i::ALPHA_OPAQUE);

          this->player.run_action(scroll_down_repeat2, [=]() {

            this->expected_queue_size(0);
            EXPECT_EQ( Point2i(200,300), anim_text->position() );

            this->expected_alpha_out_params(  anim_fade_out0.get(),
                                              Color4i::ALPHA_TRANSPARENT,
                                              anim_fade_tex );
            this->expected_repeat_params(scroll_down_repeat2_translate.get(), 2);
            this->expected_repeat_params(scroll_down_repeat2_fade_out.get(), 2);
            this->expected_action_params( scroll_down_repeat2.get(),
                                          IAnimationAction::AnimationType::GROUP,
                                          2 );

            this->player.run_action(fade_screen_out_action, [=]() {

              this->expected_queue_size(0);

              this->expected_alpha_out_params(  fade_screen_out.get(),
                                                Color4i::ALPHA_TRANSPARENT,
                                                bg_tex );
              this->expected_action_params( fade_screen_out_action.get(),
                                            IAnimationAction::AnimationType::SEQUENCE,
                                            1 );
              this->quit();
            });
          });
        });
      });
    });
  });