111cd02dfb91661c65134cac258cf5924270e9d2Dan Albert""" 211cd02dfb91661c65134cac258cf5924270e9d2Dan AlbertAn auto-completion window for IDLE, used by the AutoComplete extension 311cd02dfb91661c65134cac258cf5924270e9d2Dan Albert""" 411cd02dfb91661c65134cac258cf5924270e9d2Dan Albertfrom Tkinter import * 511cd02dfb91661c65134cac258cf5924270e9d2Dan Albertfrom idlelib.MultiCall import MC_SHIFT 611cd02dfb91661c65134cac258cf5924270e9d2Dan Albertfrom idlelib.AutoComplete import COMPLETE_FILES, COMPLETE_ATTRIBUTES 711cd02dfb91661c65134cac258cf5924270e9d2Dan Albert 811cd02dfb91661c65134cac258cf5924270e9d2Dan AlbertHIDE_VIRTUAL_EVENT_NAME = "<<autocompletewindow-hide>>" 911cd02dfb91661c65134cac258cf5924270e9d2Dan AlbertHIDE_SEQUENCES = ("<FocusOut>", "<ButtonPress>") 1011cd02dfb91661c65134cac258cf5924270e9d2Dan AlbertKEYPRESS_VIRTUAL_EVENT_NAME = "<<autocompletewindow-keypress>>" 1111cd02dfb91661c65134cac258cf5924270e9d2Dan Albert# We need to bind event beyond <Key> so that the function will be called 1211cd02dfb91661c65134cac258cf5924270e9d2Dan Albert# before the default specific IDLE function 1311cd02dfb91661c65134cac258cf5924270e9d2Dan AlbertKEYPRESS_SEQUENCES = ("<Key>", "<Key-BackSpace>", "<Key-Return>", "<Key-Tab>", 1411cd02dfb91661c65134cac258cf5924270e9d2Dan Albert "<Key-Up>", "<Key-Down>", "<Key-Home>", "<Key-End>", 1511cd02dfb91661c65134cac258cf5924270e9d2Dan Albert "<Key-Prior>", "<Key-Next>") 1611cd02dfb91661c65134cac258cf5924270e9d2Dan AlbertKEYRELEASE_VIRTUAL_EVENT_NAME = "<<autocompletewindow-keyrelease>>" 1711cd02dfb91661c65134cac258cf5924270e9d2Dan AlbertKEYRELEASE_SEQUENCE = "<KeyRelease>" 1811cd02dfb91661c65134cac258cf5924270e9d2Dan AlbertLISTUPDATE_SEQUENCE = "<B1-ButtonRelease>" 1911cd02dfb91661c65134cac258cf5924270e9d2Dan AlbertWINCONFIG_SEQUENCE = "<Configure>" 2011cd02dfb91661c65134cac258cf5924270e9d2Dan AlbertDOUBLECLICK_SEQUENCE = "<B1-Double-ButtonRelease>" 2111cd02dfb91661c65134cac258cf5924270e9d2Dan Albert 2211cd02dfb91661c65134cac258cf5924270e9d2Dan Albertclass AutoCompleteWindow: 2311cd02dfb91661c65134cac258cf5924270e9d2Dan Albert 2411cd02dfb91661c65134cac258cf5924270e9d2Dan Albert def __init__(self, widget): 2511cd02dfb91661c65134cac258cf5924270e9d2Dan Albert # The widget (Text) on which we place the AutoCompleteWindow 2611cd02dfb91661c65134cac258cf5924270e9d2Dan Albert self.widget = widget 2711cd02dfb91661c65134cac258cf5924270e9d2Dan Albert # The widgets we create 2811cd02dfb91661c65134cac258cf5924270e9d2Dan Albert self.autocompletewindow = self.listbox = self.scrollbar = None 2911cd02dfb91661c65134cac258cf5924270e9d2Dan Albert # The default foreground and background of a selection. Saved because 3011cd02dfb91661c65134cac258cf5924270e9d2Dan Albert # they are changed to the regular colors of list items when the 3111cd02dfb91661c65134cac258cf5924270e9d2Dan Albert # completion start is not a prefix of the selected completion 3211cd02dfb91661c65134cac258cf5924270e9d2Dan Albert self.origselforeground = self.origselbackground = None 3311cd02dfb91661c65134cac258cf5924270e9d2Dan Albert # The list of completions 3411cd02dfb91661c65134cac258cf5924270e9d2Dan Albert self.completions = None 3511cd02dfb91661c65134cac258cf5924270e9d2Dan Albert # A list with more completions, or None 3611cd02dfb91661c65134cac258cf5924270e9d2Dan Albert self.morecompletions = None 3711cd02dfb91661c65134cac258cf5924270e9d2Dan Albert # The completion mode. Either AutoComplete.COMPLETE_ATTRIBUTES or 3811cd02dfb91661c65134cac258cf5924270e9d2Dan Albert # AutoComplete.COMPLETE_FILES 3911cd02dfb91661c65134cac258cf5924270e9d2Dan Albert self.mode = None 4011cd02dfb91661c65134cac258cf5924270e9d2Dan Albert # The current completion start, on the text box (a string) 4111cd02dfb91661c65134cac258cf5924270e9d2Dan Albert self.start = None 4211cd02dfb91661c65134cac258cf5924270e9d2Dan Albert # The index of the start of the completion 4311cd02dfb91661c65134cac258cf5924270e9d2Dan Albert self.startindex = None 4411cd02dfb91661c65134cac258cf5924270e9d2Dan Albert # The last typed start, used so that when the selection changes, 4511cd02dfb91661c65134cac258cf5924270e9d2Dan Albert # the new start will be as close as possible to the last typed one. 4611cd02dfb91661c65134cac258cf5924270e9d2Dan Albert self.lasttypedstart = None 4711cd02dfb91661c65134cac258cf5924270e9d2Dan Albert # Do we have an indication that the user wants the completion window 4811cd02dfb91661c65134cac258cf5924270e9d2Dan Albert # (for example, he clicked the list) 4911cd02dfb91661c65134cac258cf5924270e9d2Dan Albert self.userwantswindow = None 5011cd02dfb91661c65134cac258cf5924270e9d2Dan Albert # event ids 5111cd02dfb91661c65134cac258cf5924270e9d2Dan Albert self.hideid = self.keypressid = self.listupdateid = self.winconfigid \ 5211cd02dfb91661c65134cac258cf5924270e9d2Dan Albert = self.keyreleaseid = self.doubleclickid = None 5311cd02dfb91661c65134cac258cf5924270e9d2Dan Albert # Flag set if last keypress was a tab 5411cd02dfb91661c65134cac258cf5924270e9d2Dan Albert self.lastkey_was_tab = False 5511cd02dfb91661c65134cac258cf5924270e9d2Dan Albert 5611cd02dfb91661c65134cac258cf5924270e9d2Dan Albert def _change_start(self, newstart): 5711cd02dfb91661c65134cac258cf5924270e9d2Dan Albert min_len = min(len(self.start), len(newstart)) 5811cd02dfb91661c65134cac258cf5924270e9d2Dan Albert i = 0 5911cd02dfb91661c65134cac258cf5924270e9d2Dan Albert while i < min_len and self.start[i] == newstart[i]: 6011cd02dfb91661c65134cac258cf5924270e9d2Dan Albert i += 1 6111cd02dfb91661c65134cac258cf5924270e9d2Dan Albert if i < len(self.start): 6211cd02dfb91661c65134cac258cf5924270e9d2Dan Albert self.widget.delete("%s+%dc" % (self.startindex, i), 6311cd02dfb91661c65134cac258cf5924270e9d2Dan Albert "%s+%dc" % (self.startindex, len(self.start))) 6411cd02dfb91661c65134cac258cf5924270e9d2Dan Albert if i < len(newstart): 6511cd02dfb91661c65134cac258cf5924270e9d2Dan Albert self.widget.insert("%s+%dc" % (self.startindex, i), 6611cd02dfb91661c65134cac258cf5924270e9d2Dan Albert newstart[i:]) 6711cd02dfb91661c65134cac258cf5924270e9d2Dan Albert self.start = newstart 6811cd02dfb91661c65134cac258cf5924270e9d2Dan Albert 6911cd02dfb91661c65134cac258cf5924270e9d2Dan Albert def _binary_search(self, s): 7011cd02dfb91661c65134cac258cf5924270e9d2Dan Albert """Find the first index in self.completions where completions[i] is 7111cd02dfb91661c65134cac258cf5924270e9d2Dan Albert greater or equal to s, or the last index if there is no such 7211cd02dfb91661c65134cac258cf5924270e9d2Dan Albert one.""" 7311cd02dfb91661c65134cac258cf5924270e9d2Dan Albert i = 0; j = len(self.completions) 7411cd02dfb91661c65134cac258cf5924270e9d2Dan Albert while j > i: 7511cd02dfb91661c65134cac258cf5924270e9d2Dan Albert m = (i + j) // 2 7611cd02dfb91661c65134cac258cf5924270e9d2Dan Albert if self.completions[m] >= s: 7711cd02dfb91661c65134cac258cf5924270e9d2Dan Albert j = m 7811cd02dfb91661c65134cac258cf5924270e9d2Dan Albert else: 7911cd02dfb91661c65134cac258cf5924270e9d2Dan Albert i = m + 1 8011cd02dfb91661c65134cac258cf5924270e9d2Dan Albert return min(i, len(self.completions)-1) 8111cd02dfb91661c65134cac258cf5924270e9d2Dan Albert 8211cd02dfb91661c65134cac258cf5924270e9d2Dan Albert def _complete_string(self, s): 8311cd02dfb91661c65134cac258cf5924270e9d2Dan Albert """Assuming that s is the prefix of a string in self.completions, 8411cd02dfb91661c65134cac258cf5924270e9d2Dan Albert return the longest string which is a prefix of all the strings which 8511cd02dfb91661c65134cac258cf5924270e9d2Dan Albert s is a prefix of them. If s is not a prefix of a string, return s.""" 8611cd02dfb91661c65134cac258cf5924270e9d2Dan Albert first = self._binary_search(s) 8711cd02dfb91661c65134cac258cf5924270e9d2Dan Albert if self.completions[first][:len(s)] != s: 8811cd02dfb91661c65134cac258cf5924270e9d2Dan Albert # There is not even one completion which s is a prefix of. 8911cd02dfb91661c65134cac258cf5924270e9d2Dan Albert return s 9011cd02dfb91661c65134cac258cf5924270e9d2Dan Albert # Find the end of the range of completions where s is a prefix of. 9111cd02dfb91661c65134cac258cf5924270e9d2Dan Albert i = first + 1 9211cd02dfb91661c65134cac258cf5924270e9d2Dan Albert j = len(self.completions) 9311cd02dfb91661c65134cac258cf5924270e9d2Dan Albert while j > i: 9411cd02dfb91661c65134cac258cf5924270e9d2Dan Albert m = (i + j) // 2 9511cd02dfb91661c65134cac258cf5924270e9d2Dan Albert if self.completions[m][:len(s)] != s: 9611cd02dfb91661c65134cac258cf5924270e9d2Dan Albert j = m 9711cd02dfb91661c65134cac258cf5924270e9d2Dan Albert else: 9811cd02dfb91661c65134cac258cf5924270e9d2Dan Albert i = m + 1 9911cd02dfb91661c65134cac258cf5924270e9d2Dan Albert last = i-1 10011cd02dfb91661c65134cac258cf5924270e9d2Dan Albert 10111cd02dfb91661c65134cac258cf5924270e9d2Dan Albert if first == last: # only one possible completion 10211cd02dfb91661c65134cac258cf5924270e9d2Dan Albert return self.completions[first] 10311cd02dfb91661c65134cac258cf5924270e9d2Dan Albert 10411cd02dfb91661c65134cac258cf5924270e9d2Dan Albert # We should return the maximum prefix of first and last 10511cd02dfb91661c65134cac258cf5924270e9d2Dan Albert first_comp = self.completions[first] 10611cd02dfb91661c65134cac258cf5924270e9d2Dan Albert last_comp = self.completions[last] 10711cd02dfb91661c65134cac258cf5924270e9d2Dan Albert min_len = min(len(first_comp), len(last_comp)) 10811cd02dfb91661c65134cac258cf5924270e9d2Dan Albert i = len(s) 10911cd02dfb91661c65134cac258cf5924270e9d2Dan Albert while i < min_len and first_comp[i] == last_comp[i]: 11011cd02dfb91661c65134cac258cf5924270e9d2Dan Albert i += 1 11111cd02dfb91661c65134cac258cf5924270e9d2Dan Albert return first_comp[:i] 11211cd02dfb91661c65134cac258cf5924270e9d2Dan Albert 11311cd02dfb91661c65134cac258cf5924270e9d2Dan Albert def _selection_changed(self): 11411cd02dfb91661c65134cac258cf5924270e9d2Dan Albert """Should be called when the selection of the Listbox has changed. 11511cd02dfb91661c65134cac258cf5924270e9d2Dan Albert Updates the Listbox display and calls _change_start.""" 11611cd02dfb91661c65134cac258cf5924270e9d2Dan Albert cursel = int(self.listbox.curselection()[0]) 11711cd02dfb91661c65134cac258cf5924270e9d2Dan Albert 11811cd02dfb91661c65134cac258cf5924270e9d2Dan Albert self.listbox.see(cursel) 11911cd02dfb91661c65134cac258cf5924270e9d2Dan Albert 12011cd02dfb91661c65134cac258cf5924270e9d2Dan Albert lts = self.lasttypedstart 12111cd02dfb91661c65134cac258cf5924270e9d2Dan Albert selstart = self.completions[cursel] 12211cd02dfb91661c65134cac258cf5924270e9d2Dan Albert if self._binary_search(lts) == cursel: 12311cd02dfb91661c65134cac258cf5924270e9d2Dan Albert newstart = lts 12411cd02dfb91661c65134cac258cf5924270e9d2Dan Albert else: 12511cd02dfb91661c65134cac258cf5924270e9d2Dan Albert min_len = min(len(lts), len(selstart)) 12611cd02dfb91661c65134cac258cf5924270e9d2Dan Albert i = 0 12711cd02dfb91661c65134cac258cf5924270e9d2Dan Albert while i < min_len and lts[i] == selstart[i]: 12811cd02dfb91661c65134cac258cf5924270e9d2Dan Albert i += 1 12911cd02dfb91661c65134cac258cf5924270e9d2Dan Albert newstart = selstart[:i] 13011cd02dfb91661c65134cac258cf5924270e9d2Dan Albert self._change_start(newstart) 13111cd02dfb91661c65134cac258cf5924270e9d2Dan Albert 13211cd02dfb91661c65134cac258cf5924270e9d2Dan Albert if self.completions[cursel][:len(self.start)] == self.start: 13311cd02dfb91661c65134cac258cf5924270e9d2Dan Albert # start is a prefix of the selected completion 13411cd02dfb91661c65134cac258cf5924270e9d2Dan Albert self.listbox.configure(selectbackground=self.origselbackground, 13511cd02dfb91661c65134cac258cf5924270e9d2Dan Albert selectforeground=self.origselforeground) 13611cd02dfb91661c65134cac258cf5924270e9d2Dan Albert else: 13711cd02dfb91661c65134cac258cf5924270e9d2Dan Albert self.listbox.configure(selectbackground=self.listbox.cget("bg"), 13811cd02dfb91661c65134cac258cf5924270e9d2Dan Albert selectforeground=self.listbox.cget("fg")) 13911cd02dfb91661c65134cac258cf5924270e9d2Dan Albert # If there are more completions, show them, and call me again. 14011cd02dfb91661c65134cac258cf5924270e9d2Dan Albert if self.morecompletions: 14111cd02dfb91661c65134cac258cf5924270e9d2Dan Albert self.completions = self.morecompletions 14211cd02dfb91661c65134cac258cf5924270e9d2Dan Albert self.morecompletions = None 14311cd02dfb91661c65134cac258cf5924270e9d2Dan Albert self.listbox.delete(0, END) 14411cd02dfb91661c65134cac258cf5924270e9d2Dan Albert for item in self.completions: 14511cd02dfb91661c65134cac258cf5924270e9d2Dan Albert self.listbox.insert(END, item) 14611cd02dfb91661c65134cac258cf5924270e9d2Dan Albert self.listbox.select_set(self._binary_search(self.start)) 14711cd02dfb91661c65134cac258cf5924270e9d2Dan Albert self._selection_changed() 14811cd02dfb91661c65134cac258cf5924270e9d2Dan Albert 14911cd02dfb91661c65134cac258cf5924270e9d2Dan Albert def show_window(self, comp_lists, index, complete, mode, userWantsWin): 15011cd02dfb91661c65134cac258cf5924270e9d2Dan Albert """Show the autocomplete list, bind events. 15111cd02dfb91661c65134cac258cf5924270e9d2Dan Albert If complete is True, complete the text, and if there is exactly one 15211cd02dfb91661c65134cac258cf5924270e9d2Dan Albert matching completion, don't open a list.""" 15311cd02dfb91661c65134cac258cf5924270e9d2Dan Albert # Handle the start we already have 15411cd02dfb91661c65134cac258cf5924270e9d2Dan Albert self.completions, self.morecompletions = comp_lists 15511cd02dfb91661c65134cac258cf5924270e9d2Dan Albert self.mode = mode 15611cd02dfb91661c65134cac258cf5924270e9d2Dan Albert self.startindex = self.widget.index(index) 15711cd02dfb91661c65134cac258cf5924270e9d2Dan Albert self.start = self.widget.get(self.startindex, "insert") 15811cd02dfb91661c65134cac258cf5924270e9d2Dan Albert if complete: 15911cd02dfb91661c65134cac258cf5924270e9d2Dan Albert completed = self._complete_string(self.start) 16011cd02dfb91661c65134cac258cf5924270e9d2Dan Albert self._change_start(completed) 16111cd02dfb91661c65134cac258cf5924270e9d2Dan Albert i = self._binary_search(completed) 16211cd02dfb91661c65134cac258cf5924270e9d2Dan Albert if self.completions[i] == completed and \ 16311cd02dfb91661c65134cac258cf5924270e9d2Dan Albert (i == len(self.completions)-1 or 16411cd02dfb91661c65134cac258cf5924270e9d2Dan Albert self.completions[i+1][:len(completed)] != completed): 16511cd02dfb91661c65134cac258cf5924270e9d2Dan Albert # There is exactly one matching completion 16611cd02dfb91661c65134cac258cf5924270e9d2Dan Albert return 16711cd02dfb91661c65134cac258cf5924270e9d2Dan Albert self.userwantswindow = userWantsWin 16811cd02dfb91661c65134cac258cf5924270e9d2Dan Albert self.lasttypedstart = self.start 16911cd02dfb91661c65134cac258cf5924270e9d2Dan Albert 17011cd02dfb91661c65134cac258cf5924270e9d2Dan Albert # Put widgets in place 171 self.autocompletewindow = acw = Toplevel(self.widget) 172 # Put it in a position so that it is not seen. 173 acw.wm_geometry("+10000+10000") 174 # Make it float 175 acw.wm_overrideredirect(1) 176 try: 177 # This command is only needed and available on Tk >= 8.4.0 for OSX 178 # Without it, call tips intrude on the typing process by grabbing 179 # the focus. 180 acw.tk.call("::tk::unsupported::MacWindowStyle", "style", acw._w, 181 "help", "noActivates") 182 except TclError: 183 pass 184 self.scrollbar = scrollbar = Scrollbar(acw, orient=VERTICAL) 185 self.listbox = listbox = Listbox(acw, yscrollcommand=scrollbar.set, 186 exportselection=False, bg="white") 187 for item in self.completions: 188 listbox.insert(END, item) 189 self.origselforeground = listbox.cget("selectforeground") 190 self.origselbackground = listbox.cget("selectbackground") 191 scrollbar.config(command=listbox.yview) 192 scrollbar.pack(side=RIGHT, fill=Y) 193 listbox.pack(side=LEFT, fill=BOTH, expand=True) 194 195 # Initialize the listbox selection 196 self.listbox.select_set(self._binary_search(self.start)) 197 self._selection_changed() 198 199 # bind events 200 self.hideid = self.widget.bind(HIDE_VIRTUAL_EVENT_NAME, 201 self.hide_event) 202 for seq in HIDE_SEQUENCES: 203 self.widget.event_add(HIDE_VIRTUAL_EVENT_NAME, seq) 204 self.keypressid = self.widget.bind(KEYPRESS_VIRTUAL_EVENT_NAME, 205 self.keypress_event) 206 for seq in KEYPRESS_SEQUENCES: 207 self.widget.event_add(KEYPRESS_VIRTUAL_EVENT_NAME, seq) 208 self.keyreleaseid = self.widget.bind(KEYRELEASE_VIRTUAL_EVENT_NAME, 209 self.keyrelease_event) 210 self.widget.event_add(KEYRELEASE_VIRTUAL_EVENT_NAME,KEYRELEASE_SEQUENCE) 211 self.listupdateid = listbox.bind(LISTUPDATE_SEQUENCE, 212 self.listselect_event) 213 self.winconfigid = acw.bind(WINCONFIG_SEQUENCE, self.winconfig_event) 214 self.doubleclickid = listbox.bind(DOUBLECLICK_SEQUENCE, 215 self.doubleclick_event) 216 217 def winconfig_event(self, event): 218 if not self.is_active(): 219 return 220 # Position the completion list window 221 text = self.widget 222 text.see(self.startindex) 223 x, y, cx, cy = text.bbox(self.startindex) 224 acw = self.autocompletewindow 225 acw_width, acw_height = acw.winfo_width(), acw.winfo_height() 226 text_width, text_height = text.winfo_width(), text.winfo_height() 227 new_x = text.winfo_rootx() + min(x, max(0, text_width - acw_width)) 228 new_y = text.winfo_rooty() + y 229 if (text_height - (y + cy) >= acw_height # enough height below 230 or y < acw_height): # not enough height above 231 # place acw below current line 232 new_y += cy 233 else: 234 # place acw above current line 235 new_y -= acw_height 236 acw.wm_geometry("+%d+%d" % (new_x, new_y)) 237 238 def hide_event(self, event): 239 if not self.is_active(): 240 return 241 self.hide_window() 242 243 def listselect_event(self, event): 244 if not self.is_active(): 245 return 246 self.userwantswindow = True 247 cursel = int(self.listbox.curselection()[0]) 248 self._change_start(self.completions[cursel]) 249 250 def doubleclick_event(self, event): 251 # Put the selected completion in the text, and close the list 252 cursel = int(self.listbox.curselection()[0]) 253 self._change_start(self.completions[cursel]) 254 self.hide_window() 255 256 def keypress_event(self, event): 257 if not self.is_active(): 258 return 259 keysym = event.keysym 260 if hasattr(event, "mc_state"): 261 state = event.mc_state 262 else: 263 state = 0 264 if keysym != "Tab": 265 self.lastkey_was_tab = False 266 if (len(keysym) == 1 or keysym in ("underscore", "BackSpace") 267 or (self.mode == COMPLETE_FILES and keysym in 268 ("period", "minus"))) \ 269 and not (state & ~MC_SHIFT): 270 # Normal editing of text 271 if len(keysym) == 1: 272 self._change_start(self.start + keysym) 273 elif keysym == "underscore": 274 self._change_start(self.start + '_') 275 elif keysym == "period": 276 self._change_start(self.start + '.') 277 elif keysym == "minus": 278 self._change_start(self.start + '-') 279 else: 280 # keysym == "BackSpace" 281 if len(self.start) == 0: 282 self.hide_window() 283 return 284 self._change_start(self.start[:-1]) 285 self.lasttypedstart = self.start 286 self.listbox.select_clear(0, int(self.listbox.curselection()[0])) 287 self.listbox.select_set(self._binary_search(self.start)) 288 self._selection_changed() 289 return "break" 290 291 elif keysym == "Return": 292 self.hide_window() 293 return 294 295 elif (self.mode == COMPLETE_ATTRIBUTES and keysym in 296 ("period", "space", "parenleft", "parenright", "bracketleft", 297 "bracketright")) or \ 298 (self.mode == COMPLETE_FILES and keysym in 299 ("slash", "backslash", "quotedbl", "apostrophe")) \ 300 and not (state & ~MC_SHIFT): 301 # If start is a prefix of the selection, but is not '' when 302 # completing file names, put the whole 303 # selected completion. Anyway, close the list. 304 cursel = int(self.listbox.curselection()[0]) 305 if self.completions[cursel][:len(self.start)] == self.start \ 306 and (self.mode == COMPLETE_ATTRIBUTES or self.start): 307 self._change_start(self.completions[cursel]) 308 self.hide_window() 309 return 310 311 elif keysym in ("Home", "End", "Prior", "Next", "Up", "Down") and \ 312 not state: 313 # Move the selection in the listbox 314 self.userwantswindow = True 315 cursel = int(self.listbox.curselection()[0]) 316 if keysym == "Home": 317 newsel = 0 318 elif keysym == "End": 319 newsel = len(self.completions)-1 320 elif keysym in ("Prior", "Next"): 321 jump = self.listbox.nearest(self.listbox.winfo_height()) - \ 322 self.listbox.nearest(0) 323 if keysym == "Prior": 324 newsel = max(0, cursel-jump) 325 else: 326 assert keysym == "Next" 327 newsel = min(len(self.completions)-1, cursel+jump) 328 elif keysym == "Up": 329 newsel = max(0, cursel-1) 330 else: 331 assert keysym == "Down" 332 newsel = min(len(self.completions)-1, cursel+1) 333 self.listbox.select_clear(cursel) 334 self.listbox.select_set(newsel) 335 self._selection_changed() 336 self._change_start(self.completions[newsel]) 337 return "break" 338 339 elif (keysym == "Tab" and not state): 340 if self.lastkey_was_tab: 341 # two tabs in a row; insert current selection and close acw 342 cursel = int(self.listbox.curselection()[0]) 343 self._change_start(self.completions[cursel]) 344 self.hide_window() 345 return "break" 346 else: 347 # first tab; let AutoComplete handle the completion 348 self.userwantswindow = True 349 self.lastkey_was_tab = True 350 return 351 352 elif any(s in keysym for s in ("Shift", "Control", "Alt", 353 "Meta", "Command", "Option")): 354 # A modifier key, so ignore 355 return 356 357 else: 358 # Unknown event, close the window and let it through. 359 self.hide_window() 360 return 361 362 def keyrelease_event(self, event): 363 if not self.is_active(): 364 return 365 if self.widget.index("insert") != \ 366 self.widget.index("%s+%dc" % (self.startindex, len(self.start))): 367 # If we didn't catch an event which moved the insert, close window 368 self.hide_window() 369 370 def is_active(self): 371 return self.autocompletewindow is not None 372 373 def complete(self): 374 self._change_start(self._complete_string(self.start)) 375 # The selection doesn't change. 376 377 def hide_window(self): 378 if not self.is_active(): 379 return 380 381 # unbind events 382 for seq in HIDE_SEQUENCES: 383 self.widget.event_delete(HIDE_VIRTUAL_EVENT_NAME, seq) 384 self.widget.unbind(HIDE_VIRTUAL_EVENT_NAME, self.hideid) 385 self.hideid = None 386 for seq in KEYPRESS_SEQUENCES: 387 self.widget.event_delete(KEYPRESS_VIRTUAL_EVENT_NAME, seq) 388 self.widget.unbind(KEYPRESS_VIRTUAL_EVENT_NAME, self.keypressid) 389 self.keypressid = None 390 self.widget.event_delete(KEYRELEASE_VIRTUAL_EVENT_NAME, 391 KEYRELEASE_SEQUENCE) 392 self.widget.unbind(KEYRELEASE_VIRTUAL_EVENT_NAME, self.keyreleaseid) 393 self.keyreleaseid = None 394 self.listbox.unbind(LISTUPDATE_SEQUENCE, self.listupdateid) 395 self.listupdateid = None 396 self.autocompletewindow.unbind(WINCONFIG_SEQUENCE, self.winconfigid) 397 self.winconfigid = None 398 399 # destroy widgets 400 self.scrollbar.destroy() 401 self.scrollbar = None 402 self.listbox.destroy() 403 self.listbox = None 404 self.autocompletewindow.destroy() 405 self.autocompletewindow = None 406