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 from kivy.clock import mainthread
   8
   9 __all__ = ["ActionList",
  10         "ActionListIcons", "ActionListIcon",
  11         "ActionListDescriptions", "ActionListDescription"]
  12
  13 actionlist_lock = Lock("playlist")
  14
  15 class ActionList(RelativeLayout):
  16     action_title = StringProperty("")
  17     action_list = ListProperty([])
  18
  19     @mainthread
  20     def update_list(self, key, action_descriptions):
  21         if key.repeat_delay > 0:
  22             self.action_title = _(
  23                     "actions linked to key {} (repeat protection {}s):"
  24                     ).format(key.key_sym, key.repeat_delay)
  25         else:
  26             self.action_title = _(
  27                     "actions linked to key {}:"
  28                     ).format(key.key_sym)
  29
  30         action_list = []
  31
  32         for [action, status] in action_descriptions:
  33             if status == "done":
  34                 icon = "✓"
  35             elif status == "current":
  36                 icon = "✅"
  37             else:
  38                 icon = " "
  39             action_list.append([icon, action])
  40         with actionlist_lock:
  41             self.action_list = action_list
  42
  43 class ActionListIcons(StackLayout):
  44     def __init__(self, **kwargs):
  45         super(ActionListIcons, self).__init__(**kwargs)
  46         self.icons = []
  47
  48     def on_parent(self, instance, parent):
  49         parent.bind(action_list=self.update_actionlist_icons)
  50
  51     def update_actionlist_icons(self, instance, actionlist):
  52         icons_length = len(self.icons)
  53         index = -1
  54         for index, [icon, description] in enumerate(actionlist):
  55             if index >= icons_length:
  56                 icon_label = ActionListIcon(text=icon)
  57                 self.add_widget(icon_label)
  58                 self.icons.append(icon_label)
  59             else:
  60                 self.icons[index].text = icon
  61
  62         if index+1 < icons_length:
  63             self.clear_widgets(children=self.icons[index+1:icons_length])
  64             del(self.icons[index+1:icons_length])
  65
  66 class ActionListIcon(Label):
  67     def __init__(self, text='', **kwargs):
  68         super(ActionListIcon, self).__init__(**kwargs)
  69         self.text = text
  70
  71     def on_parent(self, instance, parent):
  72         if parent is not None:
  73             parent.bind(font_size=self.update_font_size)
  74             parent.bind(labels_height=self.update_height)
  75
  76     def update_height(self, instance, height):
  77         self.height = height
  78
  79     def update_font_size(self, instance, font_size):
  80         self.font_size = font_size
  81
  82 class ActionListDescriptions(StackLayout):
  83     def __init__(self, **kwargs):
  84         super(ActionListDescriptions, self).__init__(**kwargs)
  85         self.descriptions = []
  86
  87     def on_parent(self, instance, parent):
  88         parent.bind(action_list=self.update_actionlist_descriptions)
  89
  90     def update_actionlist_descriptions(self, instance, actionlist):
  91         descriptions_length = len(self.descriptions)
  92         index = -1
  93         for index, [icon, description] in enumerate(actionlist):
  94             if index >= descriptions_length:
  95                 description_label = ActionListDescription(text=description)
  96                 self.add_widget(description_label)
  97                 self.descriptions.append(description_label)
  98             else:
  99                 self.descriptions[index].text = description
 100
 101         if index+1 < descriptions_length:
 102             self.clear_widgets(
 103                     children=self.descriptions[index+1:descriptions_length])
 104             del(self.descriptions[index+1:descriptions_length])
 105
 106 class ActionListDescription(Label):
 107     def __init__(self, text='', **kwargs):
 108         super(ActionListDescription, self).__init__(**kwargs)
 109         self.text = text
 110
 111     def on_parent(self, instance, parent):
 112         if parent is not None:
 113             parent.bind(font_size=self.update_font_size)
 114             parent.bind(labels_height=self.update_height)
 115
 116     def update_height(self, instance, height):
 117         self.height = height
 118
 119     def update_font_size(self, instance, font_size):
 120         self.font_size = font_size
 121