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256 lines
11 KiB
Python
256 lines
11 KiB
Python
"""
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dialog for building tkinter accelerator key bindings
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"""
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from Tkinter import *
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import tkMessageBox
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import string, os
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class GetKeysDialog(Toplevel):
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def __init__(self,parent,title,action,currentKeySequences):
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"""
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action - string, the name of the virtual event these keys will be
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mapped to
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currentKeys - list, a list of all key sequence lists currently mapped
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to virtual events, for overlap checking
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"""
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Toplevel.__init__(self, parent)
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self.configure(borderwidth=5)
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self.resizable(height=FALSE,width=FALSE)
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self.title(title)
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self.transient(parent)
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self.grab_set()
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self.protocol("WM_DELETE_WINDOW", self.Cancel)
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self.parent = parent
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self.action=action
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self.currentKeySequences=currentKeySequences
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self.result=''
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self.keyString=StringVar(self)
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self.keyString.set('')
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self.keyCtrl=StringVar(self)
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self.keyCtrl.set('')
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self.keyAlt=StringVar(self)
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self.keyAlt.set('')
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self.keyShift=StringVar(self)
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self.keyShift.set('')
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self.CreateWidgets()
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self.LoadFinalKeyList()
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self.withdraw() #hide while setting geometry
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self.update_idletasks()
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self.geometry("+%d+%d" %
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((parent.winfo_rootx()+((parent.winfo_width()/2)
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-(self.winfo_reqwidth()/2)),
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parent.winfo_rooty()+((parent.winfo_height()/2)
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-(self.winfo_reqheight()/2)) )) ) #centre dialog over parent
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self.deiconify() #geometry set, unhide
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self.wait_window()
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def CreateWidgets(self):
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frameMain = Frame(self,borderwidth=2,relief=SUNKEN)
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frameMain.pack(side=TOP,expand=TRUE,fill=BOTH)
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frameButtons=Frame(self)
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frameButtons.pack(side=BOTTOM,fill=X)
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self.buttonOk = Button(frameButtons,text='Ok',
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width=8,command=self.Ok)
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self.buttonOk.grid(row=0,column=0,padx=5,pady=5)
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self.buttonCancel = Button(frameButtons,text='Cancel',
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width=8,command=self.Cancel)
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self.buttonCancel.grid(row=0,column=1,padx=5,pady=5)
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self.frameKeySeqBasic = Frame(frameMain)
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self.frameKeySeqAdvanced = Frame(frameMain)
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self.frameControlsBasic = Frame(frameMain)
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self.frameHelpAdvanced = Frame(frameMain)
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self.frameKeySeqAdvanced.grid(row=0,column=0,sticky=NSEW,padx=5,pady=5)
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self.frameKeySeqBasic.grid(row=0,column=0,sticky=NSEW,padx=5,pady=5)
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self.frameKeySeqBasic.lift()
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self.frameHelpAdvanced.grid(row=1,column=0,sticky=NSEW,padx=5)
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self.frameControlsBasic.grid(row=1,column=0,sticky=NSEW,padx=5)
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self.frameControlsBasic.lift()
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self.buttonLevel = Button(frameMain,command=self.ToggleLevel,
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text='Advanced Key Binding Entry >>')
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self.buttonLevel.grid(row=2,column=0,stick=EW,padx=5,pady=5)
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labelTitleBasic = Label(self.frameKeySeqBasic,
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text="New keys for '"+self.action+"' :")
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labelTitleBasic.pack(anchor=W)
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labelKeysBasic = Label(self.frameKeySeqBasic,justify=LEFT,
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textvariable=self.keyString,relief=GROOVE,borderwidth=2)
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labelKeysBasic.pack(ipadx=5,ipady=5,fill=X)
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checkCtrl=Checkbutton(self.frameControlsBasic,
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command=self.BuildKeyString,
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text='Ctrl',variable=self.keyCtrl,onvalue='Control',offvalue='')
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checkCtrl.grid(row=0,column=0,padx=2,sticky=W)
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checkAlt=Checkbutton(self.frameControlsBasic,
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command=self.BuildKeyString,
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text='Alt',variable=self.keyAlt,onvalue='Alt',offvalue='')
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checkAlt.grid(row=0,column=1,padx=2,sticky=W)
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checkShift=Checkbutton(self.frameControlsBasic,
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command=self.BuildKeyString,
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text='Shift',variable=self.keyShift,onvalue='Shift',offvalue='')
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checkShift.grid(row=0,column=3,padx=2,sticky=W)
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labelFnAdvice=Label(self.frameControlsBasic,justify=LEFT,
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text="Select the desired modifier\n"+
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"keys above, and final key\n"+
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"from the list on the right.")
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labelFnAdvice.grid(row=1,column=0,columnspan=4,padx=2,sticky=W)
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self.listKeysFinal=Listbox(self.frameControlsBasic,width=15,height=10,
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selectmode=SINGLE)
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self.listKeysFinal.bind('<ButtonRelease-1>',self.FinalKeySelected)
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self.listKeysFinal.grid(row=0,column=4,rowspan=4,sticky=NS)
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scrollKeysFinal=Scrollbar(self.frameControlsBasic,orient=VERTICAL,
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command=self.listKeysFinal.yview)
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self.listKeysFinal.config(yscrollcommand=scrollKeysFinal.set)
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scrollKeysFinal.grid(row=0,column=5,rowspan=4,sticky=NS)
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self.buttonClear=Button(self.frameControlsBasic,
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text='Clear Keys',command=self.ClearKeySeq)
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self.buttonClear.grid(row=2,column=0,columnspan=4)
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labelTitleAdvanced = Label(self.frameKeySeqAdvanced,justify=LEFT,
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text="Enter new binding(s) for '"+self.action+"' :\n"+
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"(will not be checked for validity)")
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labelTitleAdvanced.pack(anchor=W)
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self.entryKeysAdvanced=Entry(self.frameKeySeqAdvanced,
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textvariable=self.keyString)
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self.entryKeysAdvanced.pack(fill=X)
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labelHelpAdvanced=Label(self.frameHelpAdvanced,justify=LEFT,
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text="Key bindings are specified using tkinter key id's as\n"+
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"in these samples: <Control-f>, <Shift-F2>, <F12>,\n"
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"<Control-space>, <Meta-less>, <Control-Alt-Shift-x>.\n\n"+
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"'Emacs style' multi-keystroke bindings are specified as\n"+
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"follows: <Control-x><Control-y> or <Meta-f><Meta-g>.\n\n"+
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"Multiple separate bindings for one action should be\n"+
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"separated by a space, eg., <Alt-v> <Meta-v>." )
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labelHelpAdvanced.grid(row=0,column=0,sticky=NSEW)
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def ToggleLevel(self):
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if self.buttonLevel.cget('text')[:8]=='Advanced':
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self.ClearKeySeq()
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self.buttonLevel.config(text='<< Basic Key Binding Entry')
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self.frameKeySeqAdvanced.lift()
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self.frameHelpAdvanced.lift()
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self.entryKeysAdvanced.focus_set()
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else:
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self.ClearKeySeq()
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self.buttonLevel.config(text='Advanced Key Binding Entry >>')
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self.frameKeySeqBasic.lift()
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self.frameControlsBasic.lift()
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def FinalKeySelected(self,event):
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self.BuildKeyString()
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def BuildKeyString(self):
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keyList=[]
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modifiers=self.GetModifiers()
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finalKey=self.listKeysFinal.get(ANCHOR)
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if modifiers: modifiers[0]='<'+modifiers[0]
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keyList=keyList+modifiers
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if finalKey:
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if (not modifiers) and (finalKey not
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in self.alphanumKeys+self.punctuationKeys):
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finalKey='<'+self.TranslateKey(finalKey)
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else:
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finalKey=self.TranslateKey(finalKey)
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keyList.append(finalKey+'>')
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keyStr=string.join(keyList,'-')
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self.keyString.set(keyStr)
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def GetModifiers(self):
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modList=[]
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ctrl=self.keyCtrl.get()
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alt=self.keyAlt.get()
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shift=self.keyShift.get()
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if ctrl: modList.append(ctrl)
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if alt: modList.append(alt)
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if shift: modList.append(shift)
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return modList
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def ClearKeySeq(self):
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self.listKeysFinal.select_clear(0,END)
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self.listKeysFinal.yview(MOVETO, '0.0')
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self.keyCtrl.set('')
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self.keyAlt.set(''),
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self.keyShift.set('')
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self.keyString.set('')
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def LoadFinalKeyList(self):
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#these tuples are also available for use in validity checks
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self.functionKeys=('F1','F2','F2','F4','F5','F6','F7','F8','F9',
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'F10','F11','F12')
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self.alphanumKeys=tuple(string.ascii_lowercase+string.digits)
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self.punctuationKeys=tuple('~!@#%^&*()_-+={}[]|;:,.<>/?')
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self.whitespaceKeys=('Tab','Space','Return')
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self.editKeys=('BackSpace','Delete','Insert')
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self.moveKeys=('Home','End','Page Up','Page Down','Left Arrow',
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'Right Arrow','Up Arrow','Down Arrow')
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#make a tuple of most of the useful common 'final' keys
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keys=(self.alphanumKeys+self.punctuationKeys+self.functionKeys+
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self.whitespaceKeys+self.editKeys+self.moveKeys)
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apply(self.listKeysFinal.insert,
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(END,)+keys)
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def TranslateKey(self,key):
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#translate from key list value to tkinter key-id
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translateDict={'~':'asciitilde','!':'exclam','@':'at','#':'numbersign',
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'%':'percent','^':'asciicircum','&':'ampersand','*':'asterisk',
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'(':'parenleft',')':'parenright','_':'underscore','-':'minus',
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'+':'plus','=':'equal','{':'braceleft','}':'braceright',
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'[':'bracketleft',']':'bracketright','|':'bar',';':'semicolon',
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':':'colon',',':'comma','.':'period','<':'less','>':'greater',
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'/':'slash','?':'question','Page Up':'Prior','Page Down':'Next',
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'Left Arrow':'Left','Right Arrow':'Right','Up Arrow':'Up',
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'Down Arrow': 'Down'}
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if key in translateDict.keys():
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key=translateDict[key]
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key='Key-'+key
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return key
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def Ok(self, event=None):
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if self.KeysOk():
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self.result=self.keyString.get()
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self.destroy()
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def Cancel(self, event=None):
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self.result=''
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self.destroy()
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def KeysOk(self):
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#simple validity check
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keysOk=1
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keys=self.keyString.get()
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keys.strip()
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finalKey=self.listKeysFinal.get(ANCHOR)
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modifiers=self.GetModifiers()
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keySequence=keys.split()#make into a key sequence list for overlap check
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if not keys: #no keys specified
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tkMessageBox.showerror(title='Key Sequence Error',
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message='No keys specified.')
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keysOk=0
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elif not keys.endswith('>'): #no final key specified
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tkMessageBox.showerror(title='Key Sequence Error',
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message='No final key specified.')
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keysOk=0
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elif (not modifiers) and (finalKey in
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self.alphanumKeys+self.punctuationKeys):
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#modifier required
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tkMessageBox.showerror(title='Key Sequence Error',
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message='No modifier key(s) specified.')
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keysOk=0
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elif (modifiers==['Shift']) and (finalKey not
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in self.functionKeys+('Tab',)):
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#shift alone is only a useful modifier with a function key
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tkMessageBox.showerror(title='Key Sequence Error',
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message='Shift alone is not a useful modifier '+
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'when used with this final key key.')
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keysOk=0
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elif keySequence in self.currentKeySequences: #keys combo already in use
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tkMessageBox.showerror(title='Key Sequence Error',
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message='This key combination is already in use.')
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keysOk=0
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return keysOk
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if __name__ == '__main__':
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#test the dialog
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root=Tk()
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def run():
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keySeq=''
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dlg=GetKeysDialog(root,'Get Keys','find-again',[])
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print dlg.result
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Button(root,text='Dialog',command=run).pack()
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root.mainloop()
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