1 """ 2 Dialog for building Tkinter accelerator key bindings 3 """ 4 from Tkinter import * 5 import tkMessageBox 6 import string 7 import sys 8 9 class GetKeysDialog(Toplevel): 10 def __init__(self,parent,title,action,currentKeySequences,_htest=False): 11 """ 12 action - string, the name of the virtual event these keys will be 13 mapped to 14 currentKeys - list, a list of all key sequence lists currently mapped 15 to virtual events, for overlap checking 16 _htest - bool, change box location when running htest 17 """ 18 Toplevel.__init__(self, parent) 19 self.configure(borderwidth=5) 20 self.resizable(height=FALSE,width=FALSE) 21 self.title(title) 22 self.transient(parent) 23 self.grab_set() 24 self.protocol("WM_DELETE_WINDOW", self.Cancel) 25 self.parent = parent 26 self.action=action 27 self.currentKeySequences=currentKeySequences 28 self.result='' 29 self.keyString=StringVar(self) 30 self.keyString.set('') 31 self.SetModifiersForPlatform() # set self.modifiers, self.modifier_label 32 self.modifier_vars = [] 33 for modifier in self.modifiers: 34 variable = StringVar(self) 35 variable.set('') 36 self.modifier_vars.append(variable) 37 self.advanced = False 38 self.CreateWidgets() 39 self.LoadFinalKeyList() 40 self.withdraw() #hide while setting geometry 41 self.update_idletasks() 42 self.geometry( 43 "+%d+%d" % ( 44 parent.winfo_rootx() + 45 (parent.winfo_width()/2 - self.winfo_reqwidth()/2), 46 parent.winfo_rooty() + 47 ((parent.winfo_height()/2 - self.winfo_reqheight()/2) 48 if not _htest else 150) 49 ) ) #centre dialog over parent (or below htest box) 50 self.deiconify() #geometry set, unhide 51 self.wait_window() 52 53 def CreateWidgets(self): 54 frameMain = Frame(self,borderwidth=2,relief=SUNKEN) 55 frameMain.pack(side=TOP,expand=TRUE,fill=BOTH) 56 frameButtons=Frame(self) 57 frameButtons.pack(side=BOTTOM,fill=X) 58 self.buttonOK = Button(frameButtons,text='OK', 59 width=8,command=self.OK) 60 self.buttonOK.grid(row=0,column=0,padx=5,pady=5) 61 self.buttonCancel = Button(frameButtons,text='Cancel', 62 width=8,command=self.Cancel) 63 self.buttonCancel.grid(row=0,column=1,padx=5,pady=5) 64 self.frameKeySeqBasic = Frame(frameMain) 65 self.frameKeySeqAdvanced = Frame(frameMain) 66 self.frameControlsBasic = Frame(frameMain) 67 self.frameHelpAdvanced = Frame(frameMain) 68 self.frameKeySeqAdvanced.grid(row=0,column=0,sticky=NSEW,padx=5,pady=5) 69 self.frameKeySeqBasic.grid(row=0,column=0,sticky=NSEW,padx=5,pady=5) 70 self.frameKeySeqBasic.lift() 71 self.frameHelpAdvanced.grid(row=1,column=0,sticky=NSEW,padx=5) 72 self.frameControlsBasic.grid(row=1,column=0,sticky=NSEW,padx=5) 73 self.frameControlsBasic.lift() 74 self.buttonLevel = Button(frameMain,command=self.ToggleLevel, 75 text='Advanced Key Binding Entry >>') 76 self.buttonLevel.grid(row=2,column=0,stick=EW,padx=5,pady=5) 77 labelTitleBasic = Label(self.frameKeySeqBasic, 78 text="New keys for '"+self.action+"' :") 79 labelTitleBasic.pack(anchor=W) 80 labelKeysBasic = Label(self.frameKeySeqBasic,justify=LEFT, 81 textvariable=self.keyString,relief=GROOVE,borderwidth=2) 82 labelKeysBasic.pack(ipadx=5,ipady=5,fill=X) 83 self.modifier_checkbuttons = {} 84 column = 0 85 for modifier, variable in zip(self.modifiers, self.modifier_vars): 86 label = self.modifier_label.get(modifier, modifier) 87 check=Checkbutton(self.frameControlsBasic, 88 command=self.BuildKeyString, 89 text=label,variable=variable,onvalue=modifier,offvalue='') 90 check.grid(row=0,column=column,padx=2,sticky=W) 91 self.modifier_checkbuttons[modifier] = check 92 column += 1 93 labelFnAdvice=Label(self.frameControlsBasic,justify=LEFT, 94 text=\ 95 "Select the desired modifier keys\n"+ 96 "above, and the final key from the\n"+ 97 "list on the right.\n\n" + 98 "Use upper case Symbols when using\n" + 99 "the Shift modifier. (Letters will be\n" + 100 "converted automatically.)") 101 labelFnAdvice.grid(row=1,column=0,columnspan=4,padx=2,sticky=W) 102 self.listKeysFinal=Listbox(self.frameControlsBasic,width=15,height=10, 103 selectmode=SINGLE) 104 self.listKeysFinal.bind('<ButtonRelease-1>',self.FinalKeySelected) 105 self.listKeysFinal.grid(row=0,column=4,rowspan=4,sticky=NS) 106 scrollKeysFinal=Scrollbar(self.frameControlsBasic,orient=VERTICAL, 107 command=self.listKeysFinal.yview) 108 self.listKeysFinal.config(yscrollcommand=scrollKeysFinal.set) 109 scrollKeysFinal.grid(row=0,column=5,rowspan=4,sticky=NS) 110 self.buttonClear=Button(self.frameControlsBasic, 111 text='Clear Keys',command=self.ClearKeySeq) 112 self.buttonClear.grid(row=2,column=0,columnspan=4) 113 labelTitleAdvanced = Label(self.frameKeySeqAdvanced,justify=LEFT, 114 text="Enter new binding(s) for '"+self.action+"' :\n"+ 115 "(These bindings will not be checked for validity!)") 116 labelTitleAdvanced.pack(anchor=W) 117 self.entryKeysAdvanced=Entry(self.frameKeySeqAdvanced, 118 textvariable=self.keyString) 119 self.entryKeysAdvanced.pack(fill=X) 120 labelHelpAdvanced=Label(self.frameHelpAdvanced,justify=LEFT, 121 text="Key bindings are specified using Tkinter keysyms as\n"+ 122 "in these samples: <Control-f>, <Shift-F2>, <F12>,\n" 123 "<Control-space>, <Meta-less>, <Control-Alt-Shift-X>.\n" 124 "Upper case is used when the Shift modifier is present!\n\n" + 125 "'Emacs style' multi-keystroke bindings are specified as\n" + 126 "follows: <Control-x><Control-y>, where the first key\n" + 127 "is the 'do-nothing' keybinding.\n\n" + 128 "Multiple separate bindings for one action should be\n"+ 129 "separated by a space, eg., <Alt-v> <Meta-v>." ) 130 labelHelpAdvanced.grid(row=0,column=0,sticky=NSEW) 131 132 def SetModifiersForPlatform(self): 133 """Determine list of names of key modifiers for this platform. 134 135 The names are used to build Tk bindings -- it doesn't matter if the 136 keyboard has these keys, it matters if Tk understands them. The 137 order is also important: key binding equality depends on it, so 138 config-keys.def must use the same ordering. 139 """ 140 if sys.platform == "darwin": 141 self.modifiers = ['Shift', 'Control', 'Option', 'Command'] 142 else: 143 self.modifiers = ['Control', 'Alt', 'Shift'] 144 self.modifier_label = {'Control': 'Ctrl'} # short name 145 146 def ToggleLevel(self): 147 if self.buttonLevel.cget('text')[:8]=='Advanced': 148 self.ClearKeySeq() 149 self.buttonLevel.config(text='<< Basic Key Binding Entry') 150 self.frameKeySeqAdvanced.lift() 151 self.frameHelpAdvanced.lift() 152 self.entryKeysAdvanced.focus_set() 153 self.advanced = True 154 else: 155 self.ClearKeySeq() 156 self.buttonLevel.config(text='Advanced Key Binding Entry >>') 157 self.frameKeySeqBasic.lift() 158 self.frameControlsBasic.lift() 159 self.advanced = False 160 161 def FinalKeySelected(self,event): 162 self.BuildKeyString() 163 164 def BuildKeyString(self): 165 keyList = modifiers = self.GetModifiers() 166 finalKey = self.listKeysFinal.get(ANCHOR) 167 if finalKey: 168 finalKey = self.TranslateKey(finalKey, modifiers) 169 keyList.append(finalKey) 170 self.keyString.set('<' + string.join(keyList,'-') + '>') 171 172 def GetModifiers(self): 173 modList = [variable.get() for variable in self.modifier_vars] 174 return [mod for mod in modList if mod] 175 176 def ClearKeySeq(self): 177 self.listKeysFinal.select_clear(0,END) 178 self.listKeysFinal.yview(MOVETO, '0.0') 179 for variable in self.modifier_vars: 180 variable.set('') 181 self.keyString.set('') 182 183 def LoadFinalKeyList(self): 184 #these tuples are also available for use in validity checks 185 self.functionKeys=('F1','F2','F2','F4','F5','F6','F7','F8','F9', 186 'F10','F11','F12') 187 self.alphanumKeys=tuple(string.ascii_lowercase+string.digits) 188 self.punctuationKeys=tuple('~!@#%^&*()_-+={}[]|;:,.<>/?') 189 self.whitespaceKeys=('Tab','Space','Return') 190 self.editKeys=('BackSpace','Delete','Insert') 191 self.moveKeys=('Home','End','Page Up','Page Down','Left Arrow', 192 'Right Arrow','Up Arrow','Down Arrow') 193 #make a tuple of most of the useful common 'final' keys 194 keys=(self.alphanumKeys+self.punctuationKeys+self.functionKeys+ 195 self.whitespaceKeys+self.editKeys+self.moveKeys) 196 self.listKeysFinal.insert(END, *keys) 197 198 def TranslateKey(self, key, modifiers): 199 "Translate from keycap symbol to the Tkinter keysym" 200 translateDict = {'Space':'space', 201 '~':'asciitilde','!':'exclam','@':'at','#':'numbersign', 202 '%':'percent','^':'asciicircum','&':'ampersand','*':'asterisk', 203 '(':'parenleft',')':'parenright','_':'underscore','-':'minus', 204 '+':'plus','=':'equal','{':'braceleft','}':'braceright', 205 '[':'bracketleft',']':'bracketright','|':'bar',';':'semicolon', 206 ':':'colon',',':'comma','.':'period','<':'less','>':'greater', 207 '/':'slash','?':'question','Page Up':'Prior','Page Down':'Next', 208 'Left Arrow':'Left','Right Arrow':'Right','Up Arrow':'Up', 209 'Down Arrow': 'Down', 'Tab':'Tab'} 210 if key in translateDict.keys(): 211 key = translateDict[key] 212 if 'Shift' in modifiers and key in string.ascii_lowercase: 213 key = key.upper() 214 key = 'Key-' + key 215 return key 216 217 def OK(self, event=None): 218 if self.advanced or self.KeysOK(): # doesn't check advanced string yet 219 self.result=self.keyString.get() 220 self.destroy() 221 222 def Cancel(self, event=None): 223 self.result='' 224 self.destroy() 225 226 def KeysOK(self): 227 '''Validity check on user's 'basic' keybinding selection. 228 229 Doesn't check the string produced by the advanced dialog because 230 'modifiers' isn't set. 231 232 ''' 233 keys = self.keyString.get() 234 keys.strip() 235 finalKey = self.listKeysFinal.get(ANCHOR) 236 modifiers = self.GetModifiers() 237 # create a key sequence list for overlap check: 238 keySequence = keys.split() 239 keysOK = False 240 title = 'Key Sequence Error' 241 if not keys: 242 tkMessageBox.showerror(title=title, parent=self, 243 message='No keys specified.') 244 elif not keys.endswith('>'): 245 tkMessageBox.showerror(title=title, parent=self, 246 message='Missing the final Key') 247 elif (not modifiers 248 and finalKey not in self.functionKeys + self.moveKeys): 249 tkMessageBox.showerror(title=title, parent=self, 250 message='No modifier key(s) specified.') 251 elif (modifiers == ['Shift']) \ 252 and (finalKey not in 253 self.functionKeys + self.moveKeys + ('Tab', 'Space')): 254 msg = 'The shift modifier by itself may not be used with'\ 255 ' this key symbol.' 256 tkMessageBox.showerror(title=title, parent=self, message=msg) 257 elif keySequence in self.currentKeySequences: 258 msg = 'This key combination is already in use.' 259 tkMessageBox.showerror(title=title, parent=self, message=msg) 260 else: 261 keysOK = True 262 return keysOK 263 264 if __name__ == '__main__': 265 from idlelib.idle_test.htest import run 266 run(GetKeysDialog) 267
