simul.py
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import math, operator, collections
import Tkinter as tk
import tkMessageBox as popup
try :
import Tkinter.scrolledtext as ScrolledText
except ImportError :
import ScrolledText
class Action (object) :
def __init__ (self, trans, mode, shift) :
self.trans = trans
self.mode = mode
self.net = trans.net
self.pre = self.net.get_marking()
self.post = None
srow, scol, erow, ecol = trans.label("srcloc")
self.start = "%s.%s" % (srow, scol + shift)
self.stop = "%s.%s" % (erow, ecol + shift)
self.line = srow
def fire (self) :
self.trans.fire(self.mode)
self.post = self.net.get_marking()
def __eq__ (self, other) :
try :
return (self.trans == other.trans and self.mode == other.mode
and self.net == other.net)
except AttributeError :
return False
class Trace (object) :
def __init__ (self, net) :
self.net = net
self.actions = []
def add (self, action) :
self.actions.append(action)
def back (self) :
self.net.set_marking(self.actions[-1].pre)
self.actions.pop()
def empty (self) :
return not self.actions
def __getitem__ (self, idx) :
return self.actions[idx]
def __len__ (self) :
return len(self.actions)
class Simulator (object) :
def __init__ (self, snk, src, net, trace=None, errline=None) :
self.snk = snk
self.src = src
self.net = net
self.srclength = len(src.splitlines())
self.width = int(math.ceil(math.log10(self.srclength)))
self.shift = self.width + 2
self.modes = []
self.trans2modes = collections.defaultdict(set)
self.trace = Trace(self.net)
self.build_gui(errline)
if trace is not None :
for trans, mode in trace :
trans = self.net.transition(trans.name)
action = Action(trans, mode, self.shift)
action.fire()
self.extend_trace(action)
self.trace.add(action)
self.update()
if trace :
self._back.configure(state=tk.NORMAL)
def update (self) :
self.update_modes()
self.update_state()
def build_gui (self, errline) :
self._win = tk.Tk()
self._win.title("ABCD simulator")
self._win.bind("<Return>", self.fire)
self._win.bind("<BackSpace>", self.back)
self._win.bind("<Escape>", self.quit)
# paned windows and frames
self._pan_main = tk.PanedWindow(self._win, orient=tk.HORIZONTAL)
self._pan_main.grid(row=0, column=0, sticky=tk.N+tk.S+tk.E+tk.W)
self.__pan_left = tk.PanedWindow(self._pan_main, orient=tk.VERTICAL)
self._pan_main.add(self.__pan_left)
self._pan_right = tk.PanedWindow(self._pan_main, orient=tk.VERTICAL)
self._pan_main.add(self._pan_right)
self._modes_frame = tk.Frame(self.__pan_left)
self.__pan_left.add(self._modes_frame)
self._trace_frame = tk.Frame(self.__pan_left)
self.__pan_left.add(self._trace_frame)
self._state_frame = tk.Frame(self._pan_right)
self._pan_right.add(self._state_frame)
# modes
self._modes_x = tk.Scrollbar (self._modes_frame,
orient=tk.HORIZONTAL)
self._modes_x.grid(row=1, column=0, sticky=tk.W+tk.E)
self._modes_y = tk.Scrollbar (self._modes_frame, orient=tk.VERTICAL)
self._modes_y.grid(row=0, column=1, sticky=tk.N+tk.S)
self._modes = tk.Listbox(self._modes_frame,
xscrollcommand=self._modes_x.set,
yscrollcommand=self._modes_y.set,
width=50,
font="monospace",
activestyle="none",
selectbackground="green",
selectborderwidth=0,
highlightthickness=0,
selectmode=tk.SINGLE,
disabledforeground="black")
self._modes.grid(row=0, column=0, sticky=tk.N+tk.S+tk.E+tk.W)
self._modes_x["command"] = self._modes.xview
self._modes_y["command"] = self._modes.yview
self._modes.bind("<Button-1>", self.select_mode)
self._modes.bind("<Double-Button-1>", self.select_mode_fire)
# fire button
self._fire = tk.Button(self._modes_frame,
text="Fire",
command=self.fire,
state=tk.DISABLED)
self._fire.grid(row=2, column=0, columnspan=2, sticky=tk.W+tk.E)
# back button
self._back = tk.Button(self._modes_frame,
text="Undo last action",
command=self.back,
state=tk.DISABLED)
self._back.grid(row=3, column=0, columnspan=2, sticky=tk.W+tk.E)
# resume button
self._resume = tk.Button(self._modes_frame,
text="Resume simulation",
command=self.resume,
state=tk.DISABLED)
self._resume.grid(row=4, column=0, columnspan=2, sticky=tk.W+tk.E)
# traces
self._trace_x = tk.Scrollbar (self._trace_frame,
orient=tk.HORIZONTAL)
self._trace_x.grid(row=1, column=0, sticky=tk.W+tk.E)
self._trace_y = tk.Scrollbar (self._trace_frame, orient=tk.VERTICAL)
self._trace_y.grid(row=0, column=1, sticky=tk.N+tk.S)
self._trace = tk.Listbox(self._trace_frame,
font="monospace",
width=50,
activestyle="none",
selectbackground="blue",
xscrollcommand=self._trace_x.set,
yscrollcommand=self._trace_y.set,
disabledforeground="black")
self._trace.grid(row=0, column=0, sticky=tk.N+tk.S+tk.E+tk.W)
self._trace_x["command"] = self._trace.xview
self._trace_y["command"] = self._trace.yview
self._trace.bind("<Button-1>", self.select_trace)
self._trace.insert(tk.END, "<init>")
# save trace button
# self._save = tk.Button(self._trace_frame,
# text="Save trace",
# command=self.save)
# self._save.grid(row=2, column=0, columnspan=2, sticky=tk.W+tk.E)
# source
self._source = ScrolledText.ScrolledText(self._pan_right,
font="monospace",
width=70,
height=min([self.srclength,
25]))
self._pan_right.add(self._source)
self._source.tag_config("linenum",
background="#eee",
foreground="#222")
for num, line in enumerate(self.src.splitlines()) :
if num :
self._source.insert(tk.END, "\n")
self._source.insert(tk.END, "%s: %s"
% (str(num+1).rjust(self.width), line))
self._source.tag_add("linenum",
"%s.0" % (num+1),
"%s.%s" % (num+1, self.width+1))
self._source.configure(state=tk.DISABLED)
if errline is not None :
self._source.tag_add("error",
"%s.%s" % (errline, self.shift),
"%s.end" % errline)
self._source.tag_config("error", background="red")
# states
self._state = ScrolledText.ScrolledText(self._pan_right,
font="monospace",
width=70,
state=tk.DISABLED,
height=10)
self._pan_right.add(self._state)
# setup cells expansion
for widget in (self._win.winfo_toplevel(), self._win,
self._modes_frame, self._trace_frame) :
widget.rowconfigure(0, weight=1)
widget.columnconfigure(0, weight=1)
# tag places and transitions
for place in self.net.place() :
if place.status not in (self.snk.entry, self.snk.internal,
self.snk.exit) :
srow, scol, erow, ecol = place.label("srcloc")
self._source.tag_add(place.name,
"%s.%s" % (srow, scol + self.shift),
"%s.%s" % (erow, ecol + self.shift))
self.buffer_bind(self._source, place.name)
for trans in self.net.transition() :
srow, scol, erow, ecol = trans.label("srcloc")
self._source.tag_add(trans.name,
"%s.%s" % (srow, scol + self.shift),
"%s.%s" % (erow, ecol + self.shift))
self.trans_bind(trans.name)
def trans_bind (self, tag) :
def trans_enter (evt) :
self.trans_enter(tag)
self._source.tag_bind(tag, "<Enter>", trans_enter)
def trans_leave (evt) :
self.trans_leave(tag)
self._source.tag_bind(tag, "<Leave>", trans_leave)
def buffer_bind (self, widget, tag) :
def buffer_enter (evt) :
self.buffer_enter(tag)
widget.tag_bind(tag, "<Enter>", buffer_enter)
def buffer_leave (evt) :
self.buffer_leave(tag)
widget.tag_bind(tag, "<Leave>", buffer_leave)
def run (self) :
self._win.mainloop()
def update_modes (self) :
self._modes.delete(0, tk.END)
self.modes = []
self.selected_mode = None
self.trans2modes = collections.defaultdict(set)
for trans in self.net.transition() :
self._source.tag_config(trans.name, background="white")
for mode in trans.modes() :
self.modes.append(Action(trans, mode, self.shift))
self.modes.sort(key=operator.attrgetter("line"))
for idx, action in enumerate(self.modes) :
self.trans2modes[action.trans.name].add(idx)
self._modes.insert(tk.END, "%s @ %s"
% (action.mode, action.trans.name))
self._source.tag_config(action.trans.name, background="yellow")
self._source.tag_raise(action.trans.name)
if not self.modes :
self._fire.configure(state=tk.DISABLED)
def fire (self, evt=None) :
if evt is not None :
self._fire.flash()
action = self.modes[self.selected_mode]
action.fire()
self.trace.add(action)
self.extend_trace(action)
self.update()
self._fire.configure(state=tk.DISABLED)
self._back.configure(state=tk.NORMAL)
def extend_trace (self, action) :
self._trace.insert(tk.END, "%s @ %s"
% (action.mode, action.trans.name))
self._trace.see(self._trace.size()-1)
def trans_enter (self, trans) :
if trans in self.trans2modes :
state = self._modes["state"]
self._modes.configure(state=tk.NORMAL)
for idx in self.trans2modes[trans] :
self._modes.itemconfig(idx,
background="orange",
selectbackground="orange")
self._modes.see(idx)
self._source.tag_config(trans, background="orange")
self._modes.configure(state=state)
def trans_leave (self, trans) :
if trans in self.trans2modes :
state = self._modes["state"]
self._modes.configure(state=tk.NORMAL)
for idx in self.trans2modes[trans] :
self._modes.itemconfig(idx,
background="white",
selectbackground="green")
if self.selected_mode in self.trans2modes[trans] :
self._source.tag_config(trans, background="green")
else :
self._source.tag_config(trans, background="yellow")
self._modes.configure(state=state)
def select_mode (self, evt) :
if not self.modes or self._modes["state"] == "disabled" :
return
if isinstance(evt, int) :
idx = evt
else :
idx = self._modes.nearest(evt.y)
for num in range(len(self.modes)) :
self._source.tag_config(self.modes[num].trans.name,
background="yellow")
self._source.tag_config(self.modes[idx].trans.name,
background="green")
self.selected_mode = idx
self._fire.configure(state=tk.NORMAL)
def select_mode_fire (self, evt) :
if self.modes or self._modes["state"] == "disabled" :
self.select_mode(evt)
self.fire(evt)
def back (self, evt=None) :
if evt is not None :
self._back.flash()
self.trace.back()
self._trace.delete(self._trace.size()-1)
if self._trace.curselection() :
last = self._trace.size() - 1
self._trace.selection_clear(0, last)
self._trace.see(last)
self.update()
if self.trace.empty() :
self._back.configure(state=tk.DISABLED)
def save (self, evt=None) :
if evt is not None :
self._save.flash()
def update_state (self) :
self._state.configure(state=tk.NORMAL)
self._state.delete("1.0", tk.END)
pos = 1
for place in self.net.place() :
if place.status not in (self.snk.entry, self.snk.internal,
self.snk.exit) :
self._state.insert(tk.END, "%s = %s\n"
% (place.name, place.tokens))
self._state.tag_add(place.name,
"%s.0" % pos, "%s.end" % pos)
pos += 1
self.buffer_bind(self._state, place.name)
self._state.configure(state=tk.DISABLED)
def buffer_enter (self, tag) :
self._state.tag_configure(tag, background="#cff")
self._source.tag_configure(tag, background="#cff")
def buffer_leave (self, tag) :
self._state.tag_configure(tag, background="white")
self._source.tag_configure(tag, background="white")
def quit (self, evt=None) :
if popup.askokcancel("Really quit?", "Are you sure you want to"
" quit the simulator?") :
self._win.quit()
def select_trace (self, evt) :
idx = self._trace.nearest(evt.y)
if idx == 0 :
self.net.set_marking(self.trace[0].pre)
else :
self.net.set_marking(self.trace[idx-1].post)
self._modes.configure(state=tk.NORMAL)
self.update()
if idx < len(self.trace) :
self._modes.selection_set(self.modes.index(self.trace[idx]))
self.select_mode(idx)
self._fire.configure(state=tk.DISABLED)
self._modes.configure(state=tk.DISABLED)
self._resume.configure(state=tk.NORMAL)
def resume (self) :
if self._trace.curselection() :
last = self._trace.size() - 1
self._trace.selection_clear(0, last)
self._trace.see(last)
self.net.set_marking(self.trace[-1].post)
self.update_state()
self._resume.configure(state=tk.DISABLED)
self._modes.configure(state=tk.NORMAL)