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268 lines
12 KiB
Python
268 lines
12 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 tkinter.messagebox as tkMessageBox
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import string
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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.SetModifiersForPlatform() # set self.modifiers, self.modifier_label
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self.modifier_vars = []
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for modifier in self.modifiers:
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variable = StringVar(self)
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variable.set('')
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self.modifier_vars.append(variable)
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self.advanced = False
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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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self.modifier_checkbuttons = {}
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column = 0
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for modifier, variable in zip(self.modifiers, self.modifier_vars):
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label = self.modifier_label.get(modifier, modifier)
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check=Checkbutton(self.frameControlsBasic,
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command=self.BuildKeyString,
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text=label,variable=variable,onvalue=modifier,offvalue='')
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check.grid(row=0,column=column,padx=2,sticky=W)
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self.modifier_checkbuttons[modifier] = check
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column += 1
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labelFnAdvice=Label(self.frameControlsBasic,justify=LEFT,
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text=\
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"Select the desired modifier keys\n"+
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"above, and the final key from the\n"+
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"list on the right.\n\n" +
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"Use upper case Symbols when using\n" +
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"the Shift modifier. (Letters will be\n" +
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"converted automatically.)")
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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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"(These bindings 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 keysyms 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"
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"Upper case is used when the Shift modifier is present!\n\n" +
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"'Emacs style' multi-keystroke bindings are specified as\n" +
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"follows: <Control-x><Control-y>, where the first key\n" +
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"is the 'do-nothing' keybinding.\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 SetModifiersForPlatform(self):
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"""Determine list of names of key modifiers for this platform.
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The names are used to build Tk bindings -- it doesn't matter if the
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keyboard has these keys, it matters if Tk understands them. The
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order is also important: key binding equality depends on it, so
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config-keys.def must use the same ordering.
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"""
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import sys
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if sys.platform == 'darwin' and sys.argv[0].count('.app'):
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self.modifiers = ['Shift', 'Control', 'Option', 'Command']
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else:
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self.modifiers = ['Control', 'Alt', 'Shift']
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self.modifier_label = {'Control': 'Ctrl'} # short name
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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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self.advanced = True
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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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self.advanced = False
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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 = modifiers = self.GetModifiers()
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finalKey = self.listKeysFinal.get(ANCHOR)
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if finalKey:
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finalKey = self.TranslateKey(finalKey, modifiers)
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keyList.append(finalKey)
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self.keyString.set('<' + string.join(keyList,'-') + '>')
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def GetModifiers(self):
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modList = [variable.get() for variable in self.modifier_vars]
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return filter(None, 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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for variable in self.modifier_vars:
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variable.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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self.listKeysFinal.insert(END, *keys)
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def TranslateKey(self, key, modifiers):
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"Translate from keycap symbol to the Tkinter keysym"
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translateDict = {'Space':'space',
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'~':'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', 'Tab':'Tab'}
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if key in translateDict.keys():
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key = translateDict[key]
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if 'Shift' in modifiers and key in string.ascii_lowercase:
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key = key.upper()
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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.advanced or self.KeysOK(): # doesn't check advanced string yet
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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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'''Validity check on user's 'basic' keybinding selection.
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Doesn't check the string produced by the advanced dialog because
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'modifiers' isn't set.
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'''
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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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# create a key sequence list for overlap check:
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keySequence = keys.split()
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keysOK = False
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title = 'Key Sequence Error'
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if not keys:
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tkMessageBox.showerror(title=title, parent=self,
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message='No keys specified.')
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elif not keys.endswith('>'):
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tkMessageBox.showerror(title=title, parent=self,
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message='Missing the final Key')
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elif (not modifiers
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and finalKey not in self.functionKeys + self.moveKeys):
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tkMessageBox.showerror(title=title, parent=self,
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message='No modifier key(s) specified.')
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elif (modifiers == ['Shift']) \
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and (finalKey not in
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self.functionKeys + self.moveKeys + ('Tab', 'Space')):
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msg = 'The shift modifier by itself may not be used with'\
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' this key symbol.'
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tkMessageBox.showerror(title=title, parent=self, message=msg)
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elif keySequence in self.currentKeySequences:
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msg = 'This key combination is already in use.'
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tkMessageBox.showerror(title=title, parent=self, message=msg)
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else:
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keysOK = True
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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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