1 """TypeinViewer class. 2 3 The TypeinViewer is what you see at the lower right of the main Pynche 4 widget. It contains three text entry fields, one each for red, green, blue. 5 Input into these windows is highly constrained; it only allows you to enter 6 values that are legal for a color axis. This usually means 0-255 for decimal 7 input and 0x0 - 0xff for hex input. 8 9 You can toggle whether you want to view and input the values in either decimal 10 or hex by clicking on Hexadecimal. By clicking on Update while typing, the 11 color selection will be made on every change to the text field. Otherwise, 12 you must hit Return or Tab to select the color. 13 """ 14 15 from Tkinter import * 16 17 18 20 class TypeinViewer: 21 def __init__(self, switchboard, master=None): 22 # non-gui ivars 23 self.__sb = switchboard 24 optiondb = switchboard.optiondb() 25 self.__hexp = BooleanVar() 26 self.__hexp.set(optiondb.get('HEXTYPE', 0)) 27 self.__uwtyping = BooleanVar() 28 self.__uwtyping.set(optiondb.get('UPWHILETYPE', 0)) 29 # create the gui 30 self.__frame = Frame(master, relief=RAISED, borderwidth=1) 31 self.__frame.grid(row=3, column=1, sticky='NSEW') 32 # Red 33 self.__xl = Label(self.__frame, text='Red:') 34 self.__xl.grid(row=0, column=0, sticky=E) 35 subframe = Frame(self.__frame) 36 subframe.grid(row=0, column=1) 37 self.__xox = Label(subframe, text='0x') 38 self.__xox.grid(row=0, column=0, sticky=E) 39 self.__xox['font'] = 'courier' 40 self.__x = Entry(subframe, width=3) 41 self.__x.grid(row=0, column=1) 42 self.__x.bindtags(self.__x.bindtags() + ('Normalize', 'Update')) 43 self.__x.bind_class('Normalize', '<Key>', self.__normalize) 44 self.__x.bind_class('Update' , '<Key>', self.__maybeupdate) 45 # Green 46 self.__yl = Label(self.__frame, text='Green:') 47 self.__yl.grid(row=1, column=0, sticky=E) 48 subframe = Frame(self.__frame) 49 subframe.grid(row=1, column=1) 50 self.__yox = Label(subframe, text='0x') 51 self.__yox.grid(row=0, column=0, sticky=E) 52 self.__yox['font'] = 'courier' 53 self.__y = Entry(subframe, width=3) 54 self.__y.grid(row=0, column=1) 55 self.__y.bindtags(self.__y.bindtags() + ('Normalize', 'Update')) 56 # Blue 57 self.__zl = Label(self.__frame, text='Blue:') 58 self.__zl.grid(row=2, column=0, sticky=E) 59 subframe = Frame(self.__frame) 60 subframe.grid(row=2, column=1) 61 self.__zox = Label(subframe, text='0x') 62 self.__zox.grid(row=0, column=0, sticky=E) 63 self.__zox['font'] = 'courier' 64 self.__z = Entry(subframe, width=3) 65 self.__z.grid(row=0, column=1) 66 self.__z.bindtags(self.__z.bindtags() + ('Normalize', 'Update')) 67 # Update while typing? 68 self.__uwt = Checkbutton(self.__frame, 69 text='Update while typing', 70 variable=self.__uwtyping) 71 self.__uwt.grid(row=3, column=0, columnspan=2, sticky=W) 72 # Hex/Dec 73 self.__hex = Checkbutton(self.__frame, 74 text='Hexadecimal', 75 variable=self.__hexp, 76 command=self.__togglehex) 77 self.__hex.grid(row=4, column=0, columnspan=2, sticky=W) 78 79 def __togglehex(self, event=None): 80 red, green, blue = self.__sb.current_rgb() 81 if self.__hexp.get(): 82 label = '0x' 83 else: 84 label = ' ' 85 self.__xox['text'] = label 86 self.__yox['text'] = label 87 self.__zox['text'] = label 88 self.update_yourself(red, green, blue) 89 90 def __normalize(self, event=None): 91 ew = event.widget 92 contents = ew.get() 93 icursor = ew.index(INSERT) 94 if contents and contents[0] in 'xX' and self.__hexp.get(): 95 contents = '0' + contents 96 # Figure out the contents in the current base. 97 try: 98 if self.__hexp.get(): 99 v = int(contents, 16) 100 else: 101 v = int(contents) 102 except ValueError: 103 v = None 104 # If value is not legal, or empty, delete the last character inserted 105 # and ring the bell. Don't ring the bell if the field is empty (it'll 106 # just equal zero. 107 if v is None: 108 pass 109 elif v < 0 or v > 255: 110 i = ew.index(INSERT) 111 if event.char: 112 contents = contents[:i-1] + contents[i:] 113 icursor -= 1 114 ew.bell() 115 elif self.__hexp.get(): 116 contents = hex(v)[2:] 117 else: 118 contents = int(v) 119 ew.delete(0, END) 120 ew.insert(0, contents) 121 ew.icursor(icursor) 122 123 def __maybeupdate(self, event=None): 124 if self.__uwtyping.get() or event.keysym in ('Return', 'Tab'): 125 self.__update(event) 126 127 def __update(self, event=None): 128 redstr = self.__x.get() or '0' 129 greenstr = self.__y.get() or '0' 130 bluestr = self.__z.get() or '0' 131 if self.__hexp.get(): 132 base = 16 133 else: 134 base = 10 135 red, green, blue = [int(x, base) for x in (redstr, greenstr, bluestr)] 136 self.__sb.update_views(red, green, blue) 137 138 def update_yourself(self, red, green, blue): 139 if self.__hexp.get(): 140 sred, sgreen, sblue = [hex(x)[2:] for x in (red, green, blue)] 141 else: 142 sred, sgreen, sblue = red, green, blue 143 x, y, z = self.__x, self.__y, self.__z 144 xicursor = x.index(INSERT) 145 yicursor = y.index(INSERT) 146 zicursor = z.index(INSERT) 147 x.delete(0, END) 148 y.delete(0, END) 149 z.delete(0, END) 150 x.insert(0, sred) 151 y.insert(0, sgreen) 152 z.insert(0, sblue) 153 x.icursor(xicursor) 154 y.icursor(yicursor) 155 z.icursor(zicursor) 156 157 def hexp_var(self): 158 return self.__hexp 159 160 def save_options(self, optiondb): 161 optiondb['HEXTYPE'] = self.__hexp.get() 162 optiondb['UPWHILETYPE'] = self.__uwtyping.get() 163
