music_sampler/app_blocks/actionlist.py

   1 from kivy.uix.label import Label
   2 from kivy.uix.stacklayout import StackLayout
   3 from kivy.uix.relativelayout import RelativeLayout
   4 from kivy.properties import ListProperty, StringProperty
   5 from ..lock import Lock
   6
   7 __all__ = ["ActionList",
   8         "ActionListIcons", "ActionListIcon",
   9         "ActionListDescriptions", "ActionListDescription"]
  10
  11 actionlist_lock = Lock("playlist")
  12
  13 class ActionList(RelativeLayout):
  14     action_title = StringProperty("")
  15     action_list = ListProperty([])
  16
  17     def update_list(self, key, action_descriptions):
  18         self.action_title = "actions linked to key {}:".format(key.key_sym)
  19         action_list = []
  20
  21         for [action, status] in action_descriptions:
  22             if status == "done":
  23                 icon = "✓"
  24             elif status == "current":
  25                 icon = "✅"
  26             else:
  27                 icon = " "
  28             action_list.append([icon, action])
  29         with actionlist_lock:
  30             self.action_list = action_list
  31
  32 class ActionListIcons(StackLayout):
  33     def __init__(self, **kwargs):
  34         super(ActionListIcons, self).__init__(**kwargs)
  35         self.icons = []
  36
  37     def on_parent(self, instance, parent):
  38         parent.bind(action_list=self.update_actionlist_icons)
  39
  40     def update_actionlist_icons(self, instance, actionlist):
  41         icons_length = len(self.icons)
  42         index = -1
  43         for index, [icon, description] in enumerate(actionlist):
  44             if index >= icons_length:
  45                 icon_label = ActionListIcon(text=icon)
  46                 self.add_widget(icon_label)
  47                 self.icons.append(icon_label)
  48             else:
  49                 self.icons[index].text = icon
  50
  51         if index+1 < icons_length:
  52             self.clear_widgets(children=self.icons[index+1:icons_length])
  53             del(self.icons[index+1:icons_length])
  54
  55 class ActionListIcon(Label):
  56     def __init__(self, text='', **kwargs):
  57         super(ActionListIcon, self).__init__(**kwargs)
  58         self.text = text
  59
  60     def on_parent(self, instance, parent):
  61         if parent is not None:
  62             parent.bind(font_size=self.update_font_size)
  63             parent.bind(labels_height=self.update_height)
  64
  65     def update_height(self, instance, height):
  66         self.height = height
  67
  68     def update_font_size(self, instance, font_size):
  69         self.font_size = font_size
  70
  71 class ActionListDescriptions(StackLayout):
  72     def __init__(self, **kwargs):
  73         super(ActionListDescriptions, self).__init__(**kwargs)
  74         self.descriptions = []
  75
  76     def on_parent(self, instance, parent):
  77         parent.bind(action_list=self.update_actionlist_descriptions)
  78
  79     def update_actionlist_descriptions(self, instance, actionlist):
  80         descriptions_length = len(self.descriptions)
  81         index = -1
  82         for index, [icon, description] in enumerate(actionlist):
  83             if index >= descriptions_length:
  84                 description_label = ActionListDescription(text=description)
  85                 self.add_widget(description_label)
  86                 self.descriptions.append(description_label)
  87             else:
  88                 self.descriptions[index].text = description
  89
  90         if index+1 < descriptions_length:
  91             self.clear_widgets(
  92                     children=self.descriptions[index+1:descriptions_length])
  93             del(self.descriptions[index+1:descriptions_length])
  94
  95 class ActionListDescription(Label):
  96     def __init__(self, text='', **kwargs):
  97         super(ActionListDescription, self).__init__(**kwargs)
  98         self.text = text
  99
 100     def on_parent(self, instance, parent):
 101         if parent is not None:
 102             parent.bind(font_size=self.update_font_size)
 103             parent.bind(labels_height=self.update_height)
 104
 105     def update_height(self, instance, height):
 106         self.height = height
 107
 108     def update_font_size(self, instance, font_size):
 109         self.font_size = font_size
 110