Mercurial > cpython-lru_cache-weakref

annotate Tools/pynche/StripViewer.py @ 54294:dba767bc3155 legacy-trunk

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remove mention of old ctypes version
author Benjamin Peterson <benjamin@python.org>
date Sat, 23 May 2009 20:59:09 +0000
parents 8a2ab5f51932
children 63741c7521aa
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1 """Strip viewer and related widgets.
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2
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3 The classes in this file implement the StripViewer shown in the top two thirds
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4 of the main Pynche window. It consists of three StripWidgets which display
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5 the variations in red, green, and blue respectively of the currently selected
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6 r/g/b color value.
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7
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8 Each StripWidget shows the color variations that are reachable by varying an
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9 axis of the currently selected color. So for example, if the color is
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10
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11 (R,G,B)=(127,163,196)
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12
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13 then the Red variations show colors from (0,163,196) to (255,163,196), the
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14 Green variations show colors from (127,0,196) to (127,255,196), and the Blue
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15 variations show colors from (127,163,0) to (127,163,255).
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16
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17 The selected color is always visible in all three StripWidgets, and in fact
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18 each StripWidget highlights the selected color, and has an arrow pointing to
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19 the selected chip, which includes the value along that particular axis.
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20
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21 Clicking on any chip in any StripWidget selects that color, and updates all
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22 arrows and other windows. By toggling on Update while dragging, Pynche will
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23 select the color under the cursor while you drag it, but be forewarned that
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24 this can be slow.
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25 """
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26
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27 from Tkinter import *
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28 import ColorDB
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29
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30 # Load this script into the Tcl interpreter and call it in
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31 # StripWidget.set_color(). This is about as fast as it can be with the
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32 # current _tkinter.c interface, which doesn't support Tcl Objects.
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33 TCLPROC = '''\
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34 proc setcolor {canv colors} {
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35 set i 1
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36 foreach c $colors {
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37 $canv itemconfigure $i -fill $c -outline $c
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38 incr i
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39 }
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40 }
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41 '''
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42
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43 # Tcl event types
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44 BTNDOWN = 4
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45 BTNUP = 5
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46 BTNDRAG = 6
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47
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48 SPACE = ' '
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49
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50
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51
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52 def constant(numchips):
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53 step = 255.0 / (numchips - 1)
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54 start = 0.0
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55 seq = []
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56 while numchips > 0:
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57 seq.append(int(start))
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58 start = start + step
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59 numchips = numchips - 1
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60 return seq
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61
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62 # red variations, green+blue = cyan constant
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63 def constant_red_generator(numchips, red, green, blue):
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64 seq = constant(numchips)
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65 return map(None, [red] * numchips, seq, seq)
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66
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67 # green variations, red+blue = magenta constant
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68 def constant_green_generator(numchips, red, green, blue):
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69 seq = constant(numchips)
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70 return map(None, seq, [green] * numchips, seq)
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71
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72 # blue variations, red+green = yellow constant
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73 def constant_blue_generator(numchips, red, green, blue):
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74 seq = constant(numchips)
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75 return map(None, seq, seq, [blue] * numchips)
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76
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77 # red variations, green+blue = cyan constant
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78 def constant_cyan_generator(numchips, red, green, blue):
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79 seq = constant(numchips)
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80 return map(None, seq, [green] * numchips, [blue] * numchips)
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81
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82 # green variations, red+blue = magenta constant
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83 def constant_magenta_generator(numchips, red, green, blue):
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84 seq = constant(numchips)
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85 return map(None, [red] * numchips, seq, [blue] * numchips)
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86
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87 # blue variations, red+green = yellow constant
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88 def constant_yellow_generator(numchips, red, green, blue):
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89 seq = constant(numchips)
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90 return map(None, [red] * numchips, [green] * numchips, seq)
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91
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92
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93
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94 class LeftArrow:
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95 _ARROWWIDTH = 30
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96 _ARROWHEIGHT = 15
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97 _YOFFSET = 13
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98 _TEXTYOFFSET = 1
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99 _TAG = ('leftarrow',)
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100
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101 def __init__(self, canvas, x):
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102 self._canvas = canvas
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103 self.__arrow, self.__text = self._create(x)
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104 self.move_to(x)
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105
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106 def _create(self, x):
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107 arrow = self._canvas.create_line(
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108 x, self._ARROWHEIGHT + self._YOFFSET,
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109 x, self._YOFFSET,
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110 x + self._ARROWWIDTH, self._YOFFSET,
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111 arrow='first',
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112 width=3.0,
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113 tags=self._TAG)
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114 text = self._canvas.create_text(
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115 x + self._ARROWWIDTH + 13,
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116 self._ARROWHEIGHT - self._TEXTYOFFSET,
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117 tags=self._TAG,
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118 text='128')
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119 return arrow, text
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120
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121 def _x(self):
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122 coords = self._canvas.coords(self._TAG)
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123 assert coords
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124 return coords[0]
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125
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126 def move_to(self, x):
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127 deltax = x - self._x()
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128 self._canvas.move(self._TAG, deltax, 0)
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129
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130 def set_text(self, text):
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131 self._canvas.itemconfigure(self.__text, text=text)
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132
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133
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134 class RightArrow(LeftArrow):
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135 _TAG = ('rightarrow',)
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136
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137 def _create(self, x):
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138 arrow = self._canvas.create_line(
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139 x, self._YOFFSET,
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140 x + self._ARROWWIDTH, self._YOFFSET,
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141 x + self._ARROWWIDTH, self._ARROWHEIGHT + self._YOFFSET,
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142 arrow='last',
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143 width=3.0,
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144 tags=self._TAG)
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145 text = self._canvas.create_text(
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146 x - self._ARROWWIDTH + 15, # BAW: kludge
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147 self._ARROWHEIGHT - self._TEXTYOFFSET,
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148 justify=RIGHT,
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149 text='128',
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150 tags=self._TAG)
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151 return arrow, text
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152
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153 def _x(self):
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154 coords = self._canvas.coords(self._TAG)
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155 assert coords
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156 return coords[0] + self._ARROWWIDTH
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157
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158
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159
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160 class StripWidget:
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161 _CHIPHEIGHT = 50
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162 _CHIPWIDTH = 10
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163 _NUMCHIPS = 40
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164
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165 def __init__(self, switchboard,
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166 master = None,
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167 chipwidth = _CHIPWIDTH,
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168 chipheight = _CHIPHEIGHT,
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169 numchips = _NUMCHIPS,
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170 generator = None,
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171 axis = None,
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172 label = '',
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173 uwdvar = None,
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174 hexvar = None):
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175 # instance variables
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176 self.__generator = generator
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177 self.__axis = axis
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178 self.__numchips = numchips
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179 assert self.__axis in (0, 1, 2)
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180 self.__uwd = uwdvar
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181 self.__hexp = hexvar
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182 # the last chip selected
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183 self.__lastchip = None
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184 self.__sb = switchboard
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185
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186 canvaswidth = numchips * (chipwidth + 1)
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187 canvasheight = chipheight + 43 # BAW: Kludge
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188
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189 # create the canvas and pack it
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190 canvas = self.__canvas = Canvas(master,
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191 width=canvaswidth,
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192 height=canvasheight,
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193 ## borderwidth=2,
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194 ## relief=GROOVE
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195 )
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196
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197 canvas.pack()
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198 canvas.bind('<ButtonPress-1>', self.__select_chip)
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199 canvas.bind('<ButtonRelease-1>', self.__select_chip)
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200 canvas.bind('<B1-Motion>', self.__select_chip)
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201
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202 # Load a proc into the Tcl interpreter. This is used in the
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203 # set_color() method to speed up setting the chip colors.
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204 canvas.tk.eval(TCLPROC)
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205
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206 # create the color strip
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207 chips = self.__chips = []
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208 x = 1
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209 y = 30
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210 tags = ('chip',)
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211 for c in range(self.__numchips):
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212 color = 'grey'
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213 canvas.create_rectangle(
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214 x, y, x+chipwidth, y+chipheight,
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215 fill=color, outline=color,
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216 tags=tags)
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217 x = x + chipwidth + 1 # for outline
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218 chips.append(color)
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219
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220 # create the strip label
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221 self.__label = canvas.create_text(
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222 3, y + chipheight + 8,
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223 text=label,
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224 anchor=W)
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225
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226 # create the arrow and text item
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227 chipx = self.__arrow_x(0)
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228 self.__leftarrow = LeftArrow(canvas, chipx)
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229
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230 chipx = self.__arrow_x(len(chips) - 1)
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231 self.__rightarrow = RightArrow(canvas, chipx)
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232
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233 def __arrow_x(self, chipnum):
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234 coords = self.__canvas.coords(chipnum+1)
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235 assert coords
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236 x0, y0, x1, y1 = coords
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237 return (x1 + x0) / 2.0
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238
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239 # Invoked when one of the chips is clicked. This should just tell the
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240 # switchboard to set the color on all the output components
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241 def __select_chip(self, event=None):
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242 x = event.x
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243 y = event.y
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244 canvas = self.__canvas
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245 chip = canvas.find_overlapping(x, y, x, y)
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246 if chip and (1 <= chip[0] <= self.__numchips):
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247 color = self.__chips[chip[0]-1]
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248 red, green, blue = ColorDB.rrggbb_to_triplet(color)
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249 etype = int(event.type)
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250 if (etype == BTNUP or self.__uwd.get()):
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251 # update everyone
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252 self.__sb.update_views(red, green, blue)
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253 else:
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254 # just track the arrows
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255 self.__trackarrow(chip[0], (red, green, blue))
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256
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257 def __trackarrow(self, chip, rgbtuple):
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258 # invert the last chip
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259 if self.__lastchip is not None:
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260 color = self.__canvas.itemcget(self.__lastchip, 'fill')
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261 self.__canvas.itemconfigure(self.__lastchip, outline=color)
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262 self.__lastchip = chip
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263 # get the arrow's text
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264 coloraxis = rgbtuple[self.__axis]
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265 if self.__hexp.get():
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266 # hex
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267 text = hex(coloraxis)
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268 else:
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269 # decimal
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270 text = repr(coloraxis)
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271 # move the arrow, and set its text
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272 if coloraxis <= 128:
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273 # use the left arrow
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274 self.__leftarrow.set_text(text)
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275 self.__leftarrow.move_to(self.__arrow_x(chip-1))
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276 self.__rightarrow.move_to(-100)
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277 else:
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278 # use the right arrow
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279 self.__rightarrow.set_text(text)
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280 self.__rightarrow.move_to(self.__arrow_x(chip-1))
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281 self.__leftarrow.move_to(-100)
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282 # and set the chip's outline
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diff changeset
283 brightness = ColorDB.triplet_to_brightness(rgbtuple)
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284 if brightness <= 128:
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285 outline = 'white'
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diff changeset
286 else:
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287 outline = 'black'
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288 self.__canvas.itemconfigure(chip, outline=outline)
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289
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290
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291 def update_yourself(self, red, green, blue):
30772
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292 assert self.__generator
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293 i = 1
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294 chip = 0
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295 chips = self.__chips = []
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296 tk = self.__canvas.tk
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297 # get the red, green, and blue components for all chips
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298 for t in self.__generator(self.__numchips, red, green, blue):
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299 rrggbb = ColorDB.triplet_to_rrggbb(t)
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300 chips.append(rrggbb)
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301 tred, tgreen, tblue = t
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302 if tred <= red and tgreen <= green and tblue <= blue:
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303 chip = i
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304 i = i + 1
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305 # call the raw tcl script
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306 colors = SPACE.join(chips)
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307 tk.eval('setcolor %s {%s}' % (self.__canvas._w, colors))
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308 # move the arrows around
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309 self.__trackarrow(chip, (red, green, blue))
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310
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311 def set(self, label, generator):
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312 self.__canvas.itemconfigure(self.__label, text=label)
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313 self.__generator = generator
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314
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315
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316 class StripViewer:
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317 def __init__(self, switchboard, master=None):
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318 self.__sb = switchboard
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319 optiondb = switchboard.optiondb()
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320 # create a frame inside the master.
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321 frame = Frame(master, relief=RAISED, borderwidth=1)
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322 frame.grid(row=1, column=0, columnspan=2, sticky='NSEW')
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323 # create the options to be used later
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324 uwd = self.__uwdvar = BooleanVar()
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325 uwd.set(optiondb.get('UPWHILEDRAG', 0))
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326 hexp = self.__hexpvar = BooleanVar()
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parents: 9266
diff changeset
327 hexp.set(optiondb.get('HEXSTRIP', 0))
9638
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328 # create the red, green, blue strips inside their own frame
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329 frame1 = Frame(frame)
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330 frame1.pack(expand=YES, fill=BOTH)
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331 self.__reds = StripWidget(switchboard, frame1,
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332 generator=constant_cyan_generator,
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diff changeset
333 axis=0,
9181
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334 label='Red Variations',
9248
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Barry Warsaw <barry@python.org>
parents: 9228
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335 uwdvar=uwd, hexvar=hexp)
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parents: 9156
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336
9638
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337 self.__greens = StripWidget(switchboard, frame1,
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parents: 9156
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338 generator=constant_magenta_generator,
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Barry Warsaw <barry@python.org>
parents: 9156
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339 axis=1,
9181
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Barry Warsaw <barry@python.org>
parents: 9170
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340 label='Green Variations',
9248
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Barry Warsaw <barry@python.org>
parents: 9228
diff changeset
341 uwdvar=uwd, hexvar=hexp)
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Barry Warsaw <barry@python.org>
parents: 9156
diff changeset
342
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343 self.__blues = StripWidget(switchboard, frame1,
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Barry Warsaw <barry@python.org>
parents: 9156
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344 generator=constant_yellow_generator,
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Barry Warsaw <barry@python.org>
parents: 9156
diff changeset
345 axis=2,
9181
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346 label='Blue Variations',
9248
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diff changeset
347 uwdvar=uwd, hexvar=hexp)
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parents: 9228
diff changeset
348
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349 # create a frame to contain the controls
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350 frame2 = Frame(frame)
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parents: 9427
diff changeset
351 frame2.pack(expand=YES, fill=BOTH)
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Barry Warsaw <barry@python.org>
parents: 9427
diff changeset
352 frame2.columnconfigure(0, weight=20)
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Barry Warsaw <barry@python.org>
parents: 9427
diff changeset
353 frame2.columnconfigure(2, weight=20)
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Barry Warsaw <barry@python.org>
parents: 9427
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354
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Barry Warsaw <barry@python.org>
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diff changeset
355 padx = 8
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Barry Warsaw <barry@python.org>
parents: 9427
diff changeset
356
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Barry Warsaw <barry@python.org>
parents: 9427
diff changeset
357 # create the black button
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Barry Warsaw <barry@python.org>
parents: 9427
diff changeset
358 blackbtn = Button(frame2,
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parents: 9638
diff changeset
359 text='Black',
9638
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Barry Warsaw <barry@python.org>
parents: 9427
diff changeset
360 command=self.__toblack)
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parents: 9427
diff changeset
361 blackbtn.grid(row=0, column=0, rowspan=2, sticky=W, padx=padx)
9248
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parents: 9228
diff changeset
362
9638
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parents: 9427
diff changeset
363 # create the controls
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Barry Warsaw <barry@python.org>
parents: 9427
diff changeset
364 uwdbtn = Checkbutton(frame2,
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Barry Warsaw <barry@python.org>
parents: 9427
diff changeset
365 text='Update while dragging',
f9cc52374c52 Added most of the mechanism to change the strips from color variations
Barry Warsaw <barry@python.org>
parents: 9427
diff changeset
366 variable=uwd)
f9cc52374c52 Added most of the mechanism to change the strips from color variations
Barry Warsaw <barry@python.org>
parents: 9427
diff changeset
367 uwdbtn.grid(row=0, column=1, sticky=W)
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Barry Warsaw <barry@python.org>
parents: 9427
diff changeset
368 hexbtn = Checkbutton(frame2,
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Barry Warsaw <barry@python.org>
parents: 9427
diff changeset
369 text='Hexadecimal',
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Barry Warsaw <barry@python.org>
parents: 9427
diff changeset
370 variable=hexp,
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Barry Warsaw <barry@python.org>
parents: 9427
diff changeset
371 command=self.__togglehex)
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Barry Warsaw <barry@python.org>
parents: 9427
diff changeset
372 hexbtn.grid(row=1, column=1, sticky=W)
9248
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Barry Warsaw <barry@python.org>
parents: 9228
diff changeset
373
9638
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Barry Warsaw <barry@python.org>
parents: 9427
diff changeset
374 # XXX: ignore this feature for now; it doesn't work quite right yet
32736
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Tim Peters <tim.peters@gmail.com>
parents: 30772
diff changeset
375
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parents: 9427
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376 ## gentypevar = self.__gentypevar = IntVar()
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Barry Warsaw <barry@python.org>
parents: 9427
diff changeset
377 ## self.__variations = Radiobutton(frame,
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Barry Warsaw <barry@python.org>
parents: 9427
diff changeset
378 ## text='Variations',
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Barry Warsaw <barry@python.org>
parents: 9427
diff changeset
379 ## variable=gentypevar,
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Barry Warsaw <barry@python.org>
parents: 9427
diff changeset
380 ## value=0,
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Barry Warsaw <barry@python.org>
parents: 9427
diff changeset
381 ## command=self.__togglegentype)
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parents: 9427
diff changeset
382 ## self.__variations.grid(row=0, column=1, sticky=W)
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Barry Warsaw <barry@python.org>
parents: 9427
diff changeset
383 ## self.__constants = Radiobutton(frame,
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Barry Warsaw <barry@python.org>
parents: 9427
diff changeset
384 ## text='Constants',
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Barry Warsaw <barry@python.org>
parents: 9427
diff changeset
385 ## variable=gentypevar,
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Barry Warsaw <barry@python.org>
parents: 9427
diff changeset
386 ## value=1,
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Barry Warsaw <barry@python.org>
parents: 9427
diff changeset
387 ## command=self.__togglegentype)
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Barry Warsaw <barry@python.org>
parents: 9427
diff changeset
388 ## self.__constants.grid(row=1, column=1, sticky=W)
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Barry Warsaw <barry@python.org>
parents: 9427
diff changeset
389
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Barry Warsaw <barry@python.org>
parents: 9427
diff changeset
390 # create the white button
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Barry Warsaw <barry@python.org>
parents: 9427
diff changeset
391 whitebtn = Button(frame2,
10755
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Barry Warsaw <barry@python.org>
parents: 9638
diff changeset
392 text='White',
9638
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Barry Warsaw <barry@python.org>
parents: 9427
diff changeset
393 command=self.__towhite)
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Barry Warsaw <barry@python.org>
parents: 9427
diff changeset
394 whitebtn.grid(row=0, column=2, rowspan=2, sticky=E, padx=padx)
9248
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Barry Warsaw <barry@python.org>
parents: 9228
diff changeset
395
9162
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Barry Warsaw <barry@python.org>
parents: 9156
diff changeset
396 def update_yourself(self, red, green, blue):
e2daa783bd47 Updated to new post-PMW framework. Moved generators to here and added
Barry Warsaw <barry@python.org>
parents: 9156
diff changeset
397 self.__reds.update_yourself(red, green, blue)
e2daa783bd47 Updated to new post-PMW framework. Moved generators to here and added
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parents: 9156
diff changeset
398 self.__greens.update_yourself(red, green, blue)
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Barry Warsaw <barry@python.org>
parents: 9156
diff changeset
399 self.__blues.update_yourself(red, green, blue)
9248
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Barry Warsaw <barry@python.org>
parents: 9228
diff changeset
400
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Barry Warsaw <barry@python.org>
parents: 9228
diff changeset
401 def __togglehex(self, event=None):
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Barry Warsaw <barry@python.org>
parents: 9228
diff changeset
402 red, green, blue = self.__sb.current_rgb()
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Barry Warsaw <barry@python.org>
parents: 9228
diff changeset
403 self.update_yourself(red, green, blue)
9414
c03ffff387f8 Saving/Restoring state into ~/.pynche file
Barry Warsaw <barry@python.org>
parents: 9266
diff changeset
404
17567
d944423e6fff StripWidget.__init__(), update_yourself(): Removed some unused local
Barry Warsaw <barry@python.org>
parents: 10755
diff changeset
405 ## def __togglegentype(self, event=None):
d944423e6fff StripWidget.__init__(), update_yourself(): Removed some unused local
Barry Warsaw <barry@python.org>
parents: 10755
diff changeset
406 ## which = self.__gentypevar.get()
d944423e6fff StripWidget.__init__(), update_yourself(): Removed some unused local
Barry Warsaw <barry@python.org>
parents: 10755
diff changeset
407 ## if which == 0:
d944423e6fff StripWidget.__init__(), update_yourself(): Removed some unused local
Barry Warsaw <barry@python.org>
parents: 10755
diff changeset
408 ## self.__reds.set(label='Red Variations',
d944423e6fff StripWidget.__init__(), update_yourself(): Removed some unused local
Barry Warsaw <barry@python.org>
parents: 10755
diff changeset
409 ## generator=constant_cyan_generator)
d944423e6fff StripWidget.__init__(), update_yourself(): Removed some unused local
Barry Warsaw <barry@python.org>
parents: 10755
diff changeset
410 ## self.__greens.set(label='Green Variations',
d944423e6fff StripWidget.__init__(), update_yourself(): Removed some unused local
Barry Warsaw <barry@python.org>
parents: 10755
diff changeset
411 ## generator=constant_magenta_generator)
d944423e6fff StripWidget.__init__(), update_yourself(): Removed some unused local
Barry Warsaw <barry@python.org>
parents: 10755
diff changeset
412 ## self.__blues.set(label='Blue Variations',
d944423e6fff StripWidget.__init__(), update_yourself(): Removed some unused local
Barry Warsaw <barry@python.org>
parents: 10755
diff changeset
413 ## generator=constant_yellow_generator)
d944423e6fff StripWidget.__init__(), update_yourself(): Removed some unused local
Barry Warsaw <barry@python.org>
parents: 10755
diff changeset
414 ## elif which == 1:
d944423e6fff StripWidget.__init__(), update_yourself(): Removed some unused local
Barry Warsaw <barry@python.org>
parents: 10755
diff changeset
415 ## self.__reds.set(label='Red Constant',
d944423e6fff StripWidget.__init__(), update_yourself(): Removed some unused local
Barry Warsaw <barry@python.org>
parents: 10755
diff changeset
416 ## generator=constant_red_generator)
d944423e6fff StripWidget.__init__(), update_yourself(): Removed some unused local
Barry Warsaw <barry@python.org>
parents: 10755
diff changeset
417 ## self.__greens.set(label='Green Constant',
d944423e6fff StripWidget.__init__(), update_yourself(): Removed some unused local
Barry Warsaw <barry@python.org>
parents: 10755
diff changeset
418 ## generator=constant_green_generator)
d944423e6fff StripWidget.__init__(), update_yourself(): Removed some unused local
Barry Warsaw <barry@python.org>
parents: 10755
diff changeset
419 ## self.__blues.set(label='Blue Constant',
d944423e6fff StripWidget.__init__(), update_yourself(): Removed some unused local
Barry Warsaw <barry@python.org>
parents: 10755
diff changeset
420 ## generator=constant_blue_generator)
d944423e6fff StripWidget.__init__(), update_yourself(): Removed some unused local
Barry Warsaw <barry@python.org>
parents: 10755
diff changeset
421 ## else:
d944423e6fff StripWidget.__init__(), update_yourself(): Removed some unused local
Barry Warsaw <barry@python.org>
parents: 10755
diff changeset
422 ## assert 0
d944423e6fff StripWidget.__init__(), update_yourself(): Removed some unused local
Barry Warsaw <barry@python.org>
parents: 10755
diff changeset
423 ## self.__sb.update_views_current()
9638
f9cc52374c52 Added most of the mechanism to change the strips from color variations
Barry Warsaw <barry@python.org>
parents: 9427
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424
f9cc52374c52 Added most of the mechanism to change the strips from color variations
Barry Warsaw <barry@python.org>
parents: 9427
diff changeset
425 def __toblack(self, event=None):
f9cc52374c52 Added most of the mechanism to change the strips from color variations
Barry Warsaw <barry@python.org>
parents: 9427
diff changeset
426 self.__sb.update_views(0, 0, 0)
f9cc52374c52 Added most of the mechanism to change the strips from color variations
Barry Warsaw <barry@python.org>
parents: 9427
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427
f9cc52374c52 Added most of the mechanism to change the strips from color variations
Barry Warsaw <barry@python.org>
parents: 9427
diff changeset
428 def __towhite(self, event=None):
f9cc52374c52 Added most of the mechanism to change the strips from color variations
Barry Warsaw <barry@python.org>
parents: 9427
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429 self.__sb.update_views(255, 255, 255)
f9cc52374c52 Added most of the mechanism to change the strips from color variations
Barry Warsaw <barry@python.org>
parents: 9427
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430
9414
c03ffff387f8 Saving/Restoring state into ~/.pynche file
Barry Warsaw <barry@python.org>
parents: 9266
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431 def save_options(self, optiondb):
c03ffff387f8 Saving/Restoring state into ~/.pynche file
Barry Warsaw <barry@python.org>
parents: 9266
diff changeset
432 optiondb['UPWHILEDRAG'] = self.__uwdvar.get()
c03ffff387f8 Saving/Restoring state into ~/.pynche file
Barry Warsaw <barry@python.org>
parents: 9266
diff changeset
433 optiondb['HEXSTRIP'] = self.__hexpvar.get()