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"""
dialog for building tkinter accelerator key bindings
"""
from Tkinter import *
import tkMessageBox
import string, os
class GetKeysDialog(Toplevel):
def __init__(self,parent,title,action,currentKeySequences):
"""
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
"""
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.keyCtrl=StringVar(self)
self.keyCtrl.set('')
self.keyAlt=StringVar(self)
self.keyAlt.set('')
self.keyShift=StringVar(self)
self.keyShift.set('')
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)) )) ) #centre dialog over parent
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)
checkCtrl=Checkbutton(self.frameControlsBasic,
command=self.BuildKeyString,
text='Ctrl',variable=self.keyCtrl,onvalue='Control',offvalue='')
checkCtrl.grid(row=0,column=0,padx=2,sticky=W)
checkAlt=Checkbutton(self.frameControlsBasic,
command=self.BuildKeyString,
text='Alt',variable=self.keyAlt,onvalue='Alt',offvalue='')
checkAlt.grid(row=0,column=1,padx=2,sticky=W)
checkShift=Checkbutton(self.frameControlsBasic,
command=self.BuildKeyString,
text='Shift',variable=self.keyShift,onvalue='Shift',offvalue='')
checkShift.grid(row=0,column=3,padx=2,sticky=W)
labelFnAdvice=Label(self.frameControlsBasic,justify=LEFT,
text="Select the desired modifier\n"+
"keys above, and final key\n"+
"from the list on the right.")
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"+
"(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 key id's as\n"+
"in these samples: <Control-f>, <Shift-F2>, <F12>,\n"
"<Control-space>, <Meta-less>, <Control-Alt-Shift-x>.\n\n"+
"'Emacs style' multi-keystroke bindings are specified as\n"+
"follows: <Control-x><Control-y> or <Meta-f><Meta-g>.\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 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()
else:
self.ClearKeySeq()
self.buttonLevel.config(text='Advanced Key Binding Entry >>')
self.frameKeySeqBasic.lift()
self.frameControlsBasic.lift()
def FinalKeySelected(self,event):
self.BuildKeyString()
def BuildKeyString(self):
keyList=[]
modifiers=self.GetModifiers()
finalKey=self.listKeysFinal.get(ANCHOR)
if modifiers: modifiers[0]='<'+modifiers[0]
keyList=keyList+modifiers
if finalKey:
if (not modifiers) and (finalKey not
in self.alphanumKeys+self.punctuationKeys):
finalKey='<'+self.TranslateKey(finalKey)
else:
finalKey=self.TranslateKey(finalKey)
keyList.append(finalKey+'>')
keyStr=string.join(keyList,'-')
self.keyString.set(keyStr)
def GetModifiers(self):
modList=[]
ctrl=self.keyCtrl.get()
alt=self.keyAlt.get()
shift=self.keyShift.get()
if ctrl: modList.append(ctrl)
if alt: modList.append(alt)
if shift: modList.append(shift)
return modList
def ClearKeySeq(self):
self.listKeysFinal.select_clear(0,END)
self.listKeysFinal.yview(MOVETO, '0.0')
self.keyCtrl.set('')
self.keyAlt.set(''),
self.keyShift.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)
apply(self.listKeysFinal.insert,
(END,)+keys)
def TranslateKey(self,key):
#translate from key list value to tkinter key-id
translateDict={'~':'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'}
if key in translateDict.keys():
key=translateDict[key]
key='Key-'+key
return key
def Ok(self, event=None):
if self.KeysOk():
self.result=self.keyString.get()
self.destroy()
def Cancel(self, event=None):
self.result=''
self.destroy()
def KeysOk(self):
#simple validity check
keysOk=1
keys=self.keyString.get()
keys.strip()
finalKey=self.listKeysFinal.get(ANCHOR)
modifiers=self.GetModifiers()
keySequence=keys.split()#make into a key sequence list for overlap check
if not keys: #no keys specified
tkMessageBox.showerror(title='Key Sequence Error',
message='No keys specified.')
keysOk=0
elif not keys.endswith('>'): #no final key specified
tkMessageBox.showerror(title='Key Sequence Error',
message='No final key specified.')
keysOk=0
elif (not modifiers) and (finalKey in
self.alphanumKeys+self.punctuationKeys):
#modifier required
tkMessageBox.showerror(title='Key Sequence Error',
message='No modifier key(s) specified.')
keysOk=0
elif (modifiers==['Shift']) and (finalKey not
in self.functionKeys+('Tab',)):
#shift alone is only a useful modifier with a function key
tkMessageBox.showerror(title='Key Sequence Error',
message='Shift alone is not a useful modifier '+
'when used with this final key key.')
keysOk=0
elif keySequence in self.currentKeySequences: #keys combo already in use
tkMessageBox.showerror(title='Key Sequence Error',
message='This key combination is already in use.')
keysOk=0
return keysOk
if __name__ == '__main__':
#test the dialog
root=Tk()
def run():
keySeq=''
dlg=GetKeysDialog(root,'Get Keys','find-again',[])
print dlg.result
Button(root,text='Dialog',command=run).pack()
root.mainloop()
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