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keybindingDialog.py
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""" Dialog for building Tkinter accelerator key bindings """ from tkinter import * import tkinter.messagebox as tkMessageBox import string import sys class GetKeysDialog(Toplevel): def __init__(self,parent,title,action,currentKeySequences,_htest=False): """ action - string, the name of the virtual event these keys will be mapped to currentKeys - list, a list of all key sequence lists currently mapped to virtual events, for overlap checking _htest - bool, change box location when running htest """ Toplevel.__init__(self, parent) self.configure(borderwidth=5) self.resizable(height=FALSE,width=FALSE) self.title(title) self.transient(parent) self.grab_set() self.protocol("WM_DELETE_WINDOW", self.Cancel) self.parent = parent self.action=action self.currentKeySequences=currentKeySequences self.result='' self.keyString=StringVar(self) self.keyString.set('') self.SetModifiersForPlatform() # set self.modifiers, self.modifier_label self.modifier_vars = [] for modifier in self.modifiers: variable = StringVar(self) variable.set('') self.modifier_vars.append(variable) self.advanced = False self.CreateWidgets() self.LoadFinalKeyList() self.withdraw() #hide while setting geometry self.update_idletasks() self.geometry( "+%d+%d" % ( parent.winfo_rootx() + (parent.winfo_width()/2 - self.winfo_reqwidth()/2), parent.winfo_rooty() + ((parent.winfo_height()/2 - self.winfo_reqheight()/2) if not _htest else 150) ) ) #centre dialog over parent (or below htest box) self.deiconify() #geometry set, unhide self.wait_window() def CreateWidgets(self): frameMain = Frame(self,borderwidth=2,relief=SUNKEN) frameMain.pack(side=TOP,expand=TRUE,fill=BOTH) frameButtons=Frame(self) frameButtons.pack(side=BOTTOM,fill=X) self.buttonOK = Button(frameButtons,text='OK', width=8,command=self.OK) self.buttonOK.grid(row=0,column=0,padx=5,pady=5) self.buttonCancel = Button(frameButtons,text='Cancel', width=8,command=self.Cancel) self.buttonCancel.grid(row=0,column=1,padx=5,pady=5) self.frameKeySeqBasic = Frame(frameMain) self.frameKeySeqAdvanced = Frame(frameMain) self.frameControlsBasic = Frame(frameMain) self.frameHelpAdvanced = Frame(frameMain) self.frameKeySeqAdvanced.grid(row=0,column=0,sticky=NSEW,padx=5,pady=5) self.frameKeySeqBasic.grid(row=0,column=0,sticky=NSEW,padx=5,pady=5) self.frameKeySeqBasic.lift() self.frameHelpAdvanced.grid(row=1,column=0,sticky=NSEW,padx=5) self.frameControlsBasic.grid(row=1,column=0,sticky=NSEW,padx=5) self.frameControlsBasic.lift() self.buttonLevel = Button(frameMain,command=self.ToggleLevel, text='Advanced Key Binding Entry >>') self.buttonLevel.grid(row=2,column=0,stick=EW,padx=5,pady=5) labelTitleBasic = Label(self.frameKeySeqBasic, text="New keys for '"+self.action+"' :") labelTitleBasic.pack(anchor=W) labelKeysBasic = Label(self.frameKeySeqBasic,justify=LEFT, textvariable=self.keyString,relief=GROOVE,borderwidth=2) labelKeysBasic.pack(ipadx=5,ipady=5,fill=X) self.modifier_checkbuttons = {} column = 0 for modifier, variable in zip(self.modifiers, self.modifier_vars): label = self.modifier_label.get(modifier, modifier) check=Checkbutton(self.frameControlsBasic, command=self.BuildKeyString, text=label,variable=variable,onvalue=modifier,offvalue='') check.grid(row=0,column=column,padx=2,sticky=W) self.modifier_checkbuttons[modifier] = check column += 1 labelFnAdvice=Label(self.frameControlsBasic,justify=LEFT, text=\ "Select the desired modifier keys\n"+ "above, and the final key from the\n"+ "list on the right.\n\n" + "Use upper case Symbols when using\n" + "the Shift modifier. (Letters will be\n" + "converted automatically.)") labelFnAdvice.grid(row=1,column=0,columnspan=4,padx=2,sticky=W) self.listKeysFinal=Listbox(self.frameControlsBasic,width=15,height=10, selectmode=SINGLE) self.listKeysFinal.bind('<ButtonRelease-1>',self.FinalKeySelected) self.listKeysFinal.grid(row=0,column=4,rowspan=4,sticky=NS) scrollKeysFinal=Scrollbar(self.frameControlsBasic,orient=VERTICAL, command=self.listKeysFinal.yview) self.listKeysFinal.config(yscrollcommand=scrollKeysFinal.set) scrollKeysFinal.grid(row=0,column=5,rowspan=4,sticky=NS) self.buttonClear=Button(self.frameControlsBasic, text='Clear Keys',command=self.ClearKeySeq) self.buttonClear.grid(row=2,column=0,columnspan=4) labelTitleAdvanced = Label(self.frameKeySeqAdvanced,justify=LEFT, text="Enter new binding(s) for '"+self.action+"' :\n"+ "(These bindings will not be checked for validity!)") labelTitleAdvanced.pack(anchor=W) self.entryKeysAdvanced=Entry(self.frameKeySeqAdvanced, textvariable=self.keyString) self.entryKeysAdvanced.pack(fill=X) labelHelpAdvanced=Label(self.frameHelpAdvanced,justify=LEFT, text="Key bindings are specified using Tkinter keysyms as\n"+ "in these samples: <Control-f>, <Shift-F2>, <F12>,\n" "<Control-space>, <Meta-less>, <Control-Alt-Shift-X>.\n" "Upper case is used when the Shift modifier is present!\n\n" + "'Emacs style' multi-keystroke bindings are specified as\n" + "follows: <Control-x><Control-y>, where the first key\n" + "is the 'do-nothing' keybinding.\n\n" + "Multiple separate bindings for one action should be\n"+ "separated by a space, eg., <Alt-v> <Meta-v>." ) labelHelpAdvanced.grid(row=0,column=0,sticky=NSEW) def SetModifiersForPlatform(self): """Determine list of names of key modifiers for this platform. The names are used to build Tk bindings -- it doesn't matter if the keyboard has these keys, it matters if Tk understands them. The order is also important: key binding equality depends on it, so config-keys.def must use the same ordering. """ if sys.platform == "darwin": self.modifiers = ['Shift', 'Control', 'Option', 'Command'] else: self.modifiers = ['Control', 'Alt', 'Shift'] self.modifier_label = {'Control': 'Ctrl'} # short name def ToggleLevel(self): if self.buttonLevel.cget('text')[:8]=='Advanced': self.ClearKeySeq() self.buttonLevel.config(text='<< Basic Key Binding Entry') self.frameKeySeqAdvanced.lift() self.frameHelpAdvanced.lift() self.entryKeysAdvanced.focus_set() self.advanced = True else: self.ClearKeySeq() self.buttonLevel.config(text='Advanced Key Binding Entry >>') self.frameKeySeqBasic.lift() self.frameControlsBasic.lift() self.advanced = False def FinalKeySelected(self,event): self.BuildKeyString() def BuildKeyString(self): keyList = modifiers = self.GetModifiers() finalKey = self.listKeysFinal.get(ANCHOR) if finalKey: finalKey = self.TranslateKey(finalKey, modifiers) keyList.append(finalKey) self.keyString.set('<' + '-'.join(keyList) + '>') def GetModifiers(self): modList = [variable.get() for variable in self.modifier_vars] return [mod for mod in modList if mod] def ClearKeySeq(self): self.listKeysFinal.select_clear(0,END) self.listKeysFinal.yview(MOVETO, '0.0') for variable in self.modifier_vars: variable.set('') self.keyString.set('') def LoadFinalKeyList(self): #these tuples are also available for use in validity checks self.functionKeys=('F1','F2','F2','F4','F5','F6','F7','F8','F9', 'F10','F11','F12') self.alphanumKeys=tuple(string.ascii_lowercase+string.digits) self.punctuationKeys=tuple('~!@#%^&*()_-+={}[]|;:,.<>/?') self.whitespaceKeys=('Tab','Space','Return') self.editKeys=('BackSpace','Delete','Insert') self.moveKeys=('Home','End','Page Up','Page Down','Left Arrow', 'Right Arrow','Up Arrow','Down Arrow') #make a tuple of most of the useful common 'final' keys keys=(self.alphanumKeys+self.punctuationKeys+self.functionKeys+ self.whitespaceKeys+self.editKeys+self.moveKeys) self.listKeysFinal.insert(END, *keys) def TranslateKey(self, key, modifiers): "Translate from keycap symbol to the Tkinter keysym" translateDict = {'Space':'space', '~':'asciitilde','!':'exclam','@':'at','#':'numbersign', '%':'percent','^':'asciicircum','&':'ampersand','*':'asterisk', '(':'parenleft',')':'parenright','_':'underscore','-':'minus', '+':'plus','=':'equal','{':'braceleft','}':'braceright', '[':'bracketleft',']':'bracketright','|':'bar',';':'semicolon', ':':'colon',',':'comma','.':'period','<':'less','>':'greater', '/':'slash','?':'question','Page Up':'Prior','Page Down':'Next', 'Left Arrow':'Left','Right Arrow':'Right','Up Arrow':'Up', 'Down Arrow': 'Down', 'Tab':'Tab'} if key in translateDict: key = translateDict[key] if 'Shift' in modifiers and key in string.ascii_lowercase: key = key.upper() key = 'Key-' + key return key def OK(self, event=None): if self.advanced or self.KeysOK(): # doesn't check advanced string yet self.result=self.keyString.get() self.destroy() def Cancel(self, event=None): self.result='' self.destroy() def KeysOK(self): '''Validity check on user's 'basic' keybinding selection. Doesn't check the string produced by the advanced dialog because 'modifiers' isn't set. ''' keys = self.keyString.get() keys.strip() finalKey = self.listKeysFinal.get(ANCHOR) modifiers = self.GetModifiers() # create a key sequence list for overlap check: keySequence = keys.split() keysOK = False title = 'Key Sequence Error' if not keys: tkMessageBox.showerror(title=title, parent=self, message='No keys specified.') elif not keys.endswith('>'): tkMessageBox.showerror(title=title, parent=self, message='Missing the final Key') elif (not modifiers and finalKey not in self.functionKeys + self.moveKeys): tkMessageBox.showerror(title=title, parent=self, message='No modifier key(s) specified.') elif (modifiers == ['Shift']) \ and (finalKey not in self.functionKeys + self.moveKeys + ('Tab', 'Space')): msg = 'The shift modifier by itself may not be used with'\ ' this key symbol.' tkMessageBox.showerror(title=title, parent=self, message=msg) elif keySequence in self.currentKeySequences: msg = 'This key combination is already in use.' tkMessageBox.showerror(title=title, parent=self, message=msg) else: keysOK = True return keysOK if __name__ == '__main__': from idlelib.idle_test.htest import run run(GetKeysDialog)