""" The External Slider Mapping widget determines which pots map to which submasters. It tells you the status of each mapping and saves and loads presets. The show is relying on this module! Do not lose it! FUQ (frequently unasked question) 1. What's with all the *args? It lets functions take any number of arguments and throw them away. Callbacks do this, and we typically don't care about what they have to say. """ from Tix import * class SliderMapping: def __init__(self, default='disconnected', synced=0, extinputlevel=0, sublevel=0): self.subname = StringVar() # name of submaster we're connected to self.subname.set(default) self.sublevel = DoubleVar() # scalelevel variable of that submaster self.sublevel.set(sublevel) self.synced = BooleanVar() # currently synced self.synced.set(synced) self.extlevel = DoubleVar() # external slider's input self.extlevel.set(extinputlevel) self.widgets = [] # list of widgets drawn self.sublabel = None # the label which represents a sub level. # we hold on to it so we can change its # textvariable self.statuslabel = None # tells us sync status self.lastbgcolor = None # last background color drawn to avoid # unnecessary redraws def sync(self, *args): self.synced.set(1) self.color_bg() def unsync(self, *args): self.synced.set(0) self.color_bg() def issynced(self): return self.synced.get() def disconnect(self, *args): self.set_subname('disconnected') # a bit hack-like self.sublabel.configure(text="N/A") self.color_bg() def isdisconnected(self): return self.subname.get() == 'disconnected' # a bit more hack-like def check_synced(self, *args): 'If external level is near than the sublevel, it synces' if self.isdisconnected(): self.unsync() return if abs(self.extlevel.get() - self.sublevel.get()) <= 0.02: self.sync() def changed_extinput(self, newlevel): 'When a new external level is received, this incorporates it' self.extlevel.set(newlevel) self.check_synced() self.color_bg() def set_subname(self, newname): self.subname.set(newname) self.unsync() self.color_bg() def color_bg(self): if self.widgets: if self.isdisconnected(): color = 'honeyDew4' # stupid hack # elif abs(self.extlevel.get() - self.sublevel.get()) <= 0.02: elif self.issynced(): color = 'honeyDew2' else: # unsynced color = 'red' if self.statuslabel: # more stupid hackery if color == 'honeyDew2': # connected self.statuslabel['text'] = 'Sync' elif self.extlevel.get() < self.sublevel.get(): self.statuslabel['text'] = 'No sync (go up)' else: self.statuslabel['text'] = 'No sync (go down)' # print "color", color, "lastbgcolor", self.lastbgcolor if self.lastbgcolor == color: return for widget in self.widgets: widget.configure(bg=color) self.lastbgcolor = color def set_sublevel_var(self, newvar): 'newvar is one of the variables in scalelevels' if newvar is not self.sublevel: try: # remove an old trace self.sublevel.trace_vdelete('w', self.sublevel.unsync_trace_cbname) except AttributeError: pass # it didn't have one self.sublevel = newvar self.sublevel.unsync_trace_cbname = self.sublevel.trace('w', self.unsync) if self.sublabel: self.sublabel.configure(textvariable=newvar) self.check_synced() def get_mapping(self): 'Get name of submaster currently mapped' return self.subname.get() def get_level_pair(self): 'Returns suitable output for ExtSliderMapper.get_levels()' return (self.subname.get(), self.extlevel.get()) def draw_interface(self, master, subnames): 'Draw interface into master, given a list of submaster names' frame = Frame(master) c = ComboBox(frame, variable=self.subname) c.slistbox.listbox.insert(END, "disconnected") for s in subnames: c.slistbox.listbox.insert(END, s) c.entry.configure(width=12) statframe = Frame(frame) self.statuslabel = Label(statframe, text="No sync") self.statuslabel.grid(columnspan=2, sticky=W) ilabel = Label(statframe, text="Input", fg='blue') ilabel.grid(row=1, sticky=W) extlabel = Label(statframe, textvariable=self.extlevel, width=5) extlabel.grid(row=1, column=1) rlabel = Label(statframe, text="Real") rlabel.grid(row=2, sticky=W) self.sublabel = Label(statframe, text="N/A", width=5) self.sublabel.grid(row=2, column=1) statframe.pack(side=BOTTOM, expand=1, fill=X) c.pack() frame.pack(side=LEFT, expand=1, fill=BOTH) self.widgets = [frame, c, statframe, self.statuslabel, ilabel, extlabel, rlabel, self.sublabel] class ExtSliderMapper(Frame): def __init__(self, parent, sliderlevels, sliderinput, filename='slidermapping', numsliders=4): 'Slider levels is scalelevels, sliderinput is an ExternalInput object' Frame.__init__(self, parent) self.parent = parent self.sliderlevels = sliderlevels self.sliderinput = sliderinput self.filename = filename self.numsliders = numsliders self.file = None # don't call setup, let them do that when scalelevels is created def setup(self): self.subnames = self.sliderlevels.keys() self.subnames.sort() self.presets = {} self.load_presets() self.current_preset = StringVar() # name of current preset self.current_mappings = [] for i in range(self.numsliders): self.current_mappings.append(SliderMapping()) self.draw_interface() def load_presets(self): self.file = open(self.filename, 'r') lines = self.file.readlines() for l in lines: tokens = l[:-1].split('\t') name = tokens.pop(0) self.presets[name] = tokens self.file.close() def save_presets(self): self.file = open(self.filename, 'w') self.file.seek(0) preset_names = self.presets.keys() preset_names.sort() for p in preset_names: s = '\t'.join([p] + self.presets[p]) + '\n' self.file.write(s) self.file.close() def load_scalelevels(self): for slidermap in self.current_mappings: try: v = self.sliderlevels[slidermap.get_mapping()] slidermap.set_sublevel_var(v) except KeyError: pass def get_levels(self): 'Called by changelevels, returns a dict of new values for submasters' if not self.sliderinput: return {} self.load_scalelevels() # freshen our input from the physical sliders rawlevels = self.sliderinput.get_levels() for rawlev, slidermap in zip(rawlevels, self.current_mappings): slidermap.changed_extinput(rawlev) return dict([m.get_level_pair() for m in self.current_mappings if m.issynced()]) def draw_interface(self): self.reallevellabels = [] subchoiceframe = Frame(self) for m in self.current_mappings: m.draw_interface(subchoiceframe, self.subnames) subchoiceframe.pack() presetframe = Frame(self) Label(presetframe, text="Preset:").pack(side=LEFT) self.presetcombo = ComboBox(presetframe, variable=self.current_preset, editable=1, command=self.apply_preset) self.draw_presets() self.presetcombo.pack(side=LEFT) Button(presetframe, text="Add", padx=0, pady=0, command=self.add_preset).pack(side=LEFT) Button(presetframe, text="Delete", padx=0, pady=0, command=self.delete_preset).pack(side=LEFT) Button(presetframe, text="Disconnect", padx=0, pady=0, command=self.disconnect_all).pack(side=LEFT) presetframe.pack(side=BOTTOM) def apply_preset(self, preset): if not preset: return preset_mapping = self.presets.get(preset) if not preset_mapping: return for subname, slidermap in zip(preset_mapping, self.current_mappings): slidermap.set_subname(subname) def delete_preset(self, *args): del self.presets[self.current_preset.get()] self.presetcombo.slistbox.listbox.delete(0, END) self.draw_presets() self.save_presets() def add_preset(self, *args): self.presets[self.current_preset.get()] = [m.get_mapping() for m in self.current_mappings] self.presetcombo.slistbox.listbox.delete(0, END) self.draw_presets() self.save_presets() def draw_presets(self): preset_names = self.presets.keys() preset_names.sort() for p in preset_names: self.presetcombo.slistbox.listbox.insert(END, p) def disconnect_all(self): for m in self.current_mappings: m.disconnect()