summaryrefslogtreecommitdiffstats
path: root/Lib/idlelib/keybindingDialog.py
blob: df024e7dc9e0460cbf5cbd18afab4413f76b4543 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
"""
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.SetModifiersForPlatform()
        self.modifier_vars = []
        for modifier in self.modifiers:
            variable = StringVar(self)
            variable.set('')
            self.modifier_vars.append(variable)
        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)
        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\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 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.
        """
        import sys
        if sys.platform == 'darwin' and sys.executable.count('.app'):
            self.modifiers = ['Shift', 'Control', 'Option', 'Command']
        else:
            self.modifiers = ['Control', 'Alt', 'Shift']
        self.modifier_label = {'Control': 'Ctrl'}

    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 = [variable.get() for variable in self.modifier_vars]
        return filter(None, modList)

    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)
        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()