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'''
(*)~---------------------------------------------------------------------------
Pupil - eye tracking platform
Copyright (C) 2012-2018 Pupil Labs

Distributed under the terms of the GNU
Lesser General Public License (LGPL v3.0).
See COPYING and COPYING.LESSER for license details.
---------------------------------------------------------------------------~(*)
'''

from plugin import System_Plugin_Base
from pyglui.cygl.utils import draw_points_norm,RGBA
from pyglui import ui

class Display_Recent_Gaze(System_Plugin_Base):
"""
DisplayGaze shows the three most
recent gaze position on the screen
"""
icon_chr = '^_^'
icon_font = 'pupil_icons'

def __init__(self, g_pool):
    super().__init__(g_pool)
    self.order = .8
    self.pupil_display_list = []

def init_ui(self):
    # Create a floating menu
    self.add_menu()
    self.menu.label = 'Display_Recent_Gaze'
    # Create a simple info text
    help_str = "Display recent gaze"
    self.menu.append(ui.Info_Text(help_str))


def recent_events(self,events):
    for pt in events.get('gaze_positions',[]):
        self.pupil_display_list.append((pt['norm_pos'] , pt['confidence']*0.8))
    self.pupil_display_list[:-3] = []


def gl_display(self):
    for pt,a in self.pupil_display_list:
        #This could be faster if there would be a method to also add multiple colors per point
        draw_points_norm([pt],
                    size=35,
                    color=RGBA(1.,.2,.4,a))
def deinit_ui(self):
    self.remove_menu()

def get_init_dict(self):
    return {}