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"""Strip viewer and related widgets.
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The classes in this file implement the StripViewer shown in the top two thirds
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of the main Pynche window. It consists of three StripWidgets which display
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the variations in red, green, and blue respectively of the currently selected
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r/g/b color value.
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Each StripWidget shows the color variations that are reachable by varying an
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axis of the currently selected color. So for example, if the color is
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(R,G,B)=(127,163,196)
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then the Red variations show colors from (0,163,196) to (255,163,196), the
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Green variations show colors from (127,0,196) to (127,255,196), and the Blue
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variations show colors from (127,163,0) to (127,163,255).
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The selected color is always visible in all three StripWidgets, and in fact
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each StripWidget highlights the selected color, and has an arrow pointing to
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the selected chip, which includes the value along that particular axis.
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Clicking on any chip in any StripWidget selects that color, and updates all
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arrows and other windows. By toggling on Update while dragging, Pynche will
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select the color under the cursor while you drag it, but be forewarned that
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this can be slow.
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"""
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from tkinter import *
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import ColorDB
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# Load this script into the Tcl interpreter and call it in
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# StripWidget.set_color(). This is about as fast as it can be with the
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# current _tkinter.c interface, which doesn't support Tcl Objects.
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TCLPROC = '''\
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proc setcolor {canv colors} {
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set i 1
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foreach c $colors {
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$canv itemconfigure $i -fill $c -outline $c
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incr i
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}
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}
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'''
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# Tcl event types
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BTNDOWN = 4
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BTNUP = 5
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BTNDRAG = 6
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SPACE = ' '
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def constant(numchips):
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step = 255.0 / (numchips - 1)
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start = 0.0
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seq = []
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while numchips > 0:
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seq.append(int(start))
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start = start + step
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numchips = numchips - 1
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return seq
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# red variations, green+blue = cyan constant
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def constant_red_generator(numchips, red, green, blue):
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seq = constant(numchips)
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return list(zip([red] * numchips, seq, seq))
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# green variations, red+blue = magenta constant
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def constant_green_generator(numchips, red, green, blue):
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seq = constant(numchips)
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return list(zip(seq, [green] * numchips, seq))
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# blue variations, red+green = yellow constant
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def constant_blue_generator(numchips, red, green, blue):
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seq = constant(numchips)
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return list(zip(seq, seq, [blue] * numchips))
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# red variations, green+blue = cyan constant
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def constant_cyan_generator(numchips, red, green, blue):
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seq = constant(numchips)
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return list(zip(seq, [green] * numchips, [blue] * numchips))
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# green variations, red+blue = magenta constant
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def constant_magenta_generator(numchips, red, green, blue):
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seq = constant(numchips)
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return list(zip([red] * numchips, seq, [blue] * numchips))
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# blue variations, red+green = yellow constant
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def constant_yellow_generator(numchips, red, green, blue):
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seq = constant(numchips)
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return list(zip([red] * numchips, [green] * numchips, seq))
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class LeftArrow:
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_ARROWWIDTH = 30
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_ARROWHEIGHT = 15
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_YOFFSET = 13
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_TEXTYOFFSET = 1
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_TAG = ('leftarrow',)
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def __init__(self, canvas, x):
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self._canvas = canvas
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self.__arrow, self.__text = self._create(x)
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self.move_to(x)
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def _create(self, x):
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arrow = self._canvas.create_line(
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x, self._ARROWHEIGHT + self._YOFFSET,
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x, self._YOFFSET,
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x + self._ARROWWIDTH, self._YOFFSET,
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arrow='first',
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width=3.0,
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tags=self._TAG)
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text = self._canvas.create_text(
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x + self._ARROWWIDTH + 13,
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self._ARROWHEIGHT - self._TEXTYOFFSET,
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tags=self._TAG,
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text='128')
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return arrow, text
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def _x(self):
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coords = list(self._canvas.coords(self._TAG))
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assert coords
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return coords[0]
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def move_to(self, x):
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deltax = x - self._x()
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self._canvas.move(self._TAG, deltax, 0)
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def set_text(self, text):
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self._canvas.itemconfigure(self.__text, text=text)
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class RightArrow(LeftArrow):
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_TAG = ('rightarrow',)
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def _create(self, x):
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arrow = self._canvas.create_line(
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x, self._YOFFSET,
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x + self._ARROWWIDTH, self._YOFFSET,
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x + self._ARROWWIDTH, self._ARROWHEIGHT + self._YOFFSET,
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arrow='last',
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width=3.0,
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tags=self._TAG)
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text = self._canvas.create_text(
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x - self._ARROWWIDTH + 15, # BAW: kludge
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self._ARROWHEIGHT - self._TEXTYOFFSET,
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justify=RIGHT,
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text='128',
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tags=self._TAG)
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return arrow, text
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def _x(self):
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coords = list(self._canvas.coords(self._TAG))
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assert coords
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return coords[0] + self._ARROWWIDTH
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class StripWidget:
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_CHIPHEIGHT = 50
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_CHIPWIDTH = 10
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_NUMCHIPS = 40
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def __init__(self, switchboard,
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master = None,
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chipwidth = _CHIPWIDTH,
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chipheight = _CHIPHEIGHT,
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numchips = _NUMCHIPS,
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generator = None,
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axis = None,
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label = '',
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uwdvar = None,
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hexvar = None):
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# instance variables
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self.__generator = generator
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self.__axis = axis
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self.__numchips = numchips
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assert self.__axis in (0, 1, 2)
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self.__uwd = uwdvar
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self.__hexp = hexvar
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# the last chip selected
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self.__lastchip = None
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self.__sb = switchboard
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canvaswidth = numchips * (chipwidth + 1)
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canvasheight = chipheight + 43 # BAW: Kludge
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# create the canvas and pack it
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canvas = self.__canvas = Canvas(master,
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width=canvaswidth,
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height=canvasheight,
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## borderwidth=2,
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## relief=GROOVE
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)
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canvas.pack()
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canvas.bind('<ButtonPress-1>', self.__select_chip)
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canvas.bind('<ButtonRelease-1>', self.__select_chip)
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canvas.bind('<B1-Motion>', self.__select_chip)
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# Load a proc into the Tcl interpreter. This is used in the
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# set_color() method to speed up setting the chip colors.
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canvas.tk.eval(TCLPROC)
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# create the color strip
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chips = self.__chips = []
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x = 1
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y = 30
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tags = ('chip',)
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for c in range(self.__numchips):
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color = 'grey'
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canvas.create_rectangle(
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x, y, x+chipwidth, y+chipheight,
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fill=color, outline=color,
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tags=tags)
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x = x + chipwidth + 1 # for outline
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chips.append(color)
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# create the strip label
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self.__label = canvas.create_text(
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3, y + chipheight + 8,
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text=label,
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anchor=W)
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# create the arrow and text item
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chipx = self.__arrow_x(0)
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self.__leftarrow = LeftArrow(canvas, chipx)
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chipx = self.__arrow_x(len(chips) - 1)
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self.__rightarrow = RightArrow(canvas, chipx)
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def __arrow_x(self, chipnum):
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coords = self.__canvas.coords(chipnum+1)
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assert coords
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x0, y0, x1, y1 = coords
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return (x1 + x0) / 2.0
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# Invoked when one of the chips is clicked. This should just tell the
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# switchboard to set the color on all the output components
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def __select_chip(self, event=None):
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x = event.x
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y = event.y
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canvas = self.__canvas
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chip = canvas.find_overlapping(x, y, x, y)
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if chip and (1 <= chip[0] <= self.__numchips):
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color = self.__chips[chip[0]-1]
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red, green, blue = ColorDB.rrggbb_to_triplet(color)
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etype = int(event.type)
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if (etype == BTNUP or self.__uwd.get()):
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# update everyone
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self.__sb.update_views(red, green, blue)
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else:
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# just track the arrows
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self.__trackarrow(chip[0], (red, green, blue))
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def __trackarrow(self, chip, rgbtuple):
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# invert the last chip
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if self.__lastchip is not None:
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color = self.__canvas.itemcget(self.__lastchip, 'fill')
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self.__canvas.itemconfigure(self.__lastchip, outline=color)
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self.__lastchip = chip
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# get the arrow's text
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coloraxis = rgbtuple[self.__axis]
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if self.__hexp.get():
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# hex
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text = hex(coloraxis)
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else:
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# decimal
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text = repr(coloraxis)
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# move the arrow, and set its text
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if coloraxis <= 128:
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# use the left arrow
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self.__leftarrow.set_text(text)
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self.__leftarrow.move_to(self.__arrow_x(chip-1))
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self.__rightarrow.move_to(-100)
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else:
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# use the right arrow
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self.__rightarrow.set_text(text)
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self.__rightarrow.move_to(self.__arrow_x(chip-1))
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self.__leftarrow.move_to(-100)
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# and set the chip's outline
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brightness = ColorDB.triplet_to_brightness(rgbtuple)
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if brightness <= 128:
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outline = 'white'
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else:
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outline = 'black'
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self.__canvas.itemconfigure(chip, outline=outline)
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def update_yourself(self, red, green, blue):
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assert self.__generator
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i = 1
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chip = 0
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chips = self.__chips = []
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tk = self.__canvas.tk
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# get the red, green, and blue components for all chips
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for t in self.__generator(self.__numchips, red, green, blue):
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rrggbb = ColorDB.triplet_to_rrggbb(t)
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chips.append(rrggbb)
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tred, tgreen, tblue = t
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if tred <= red and tgreen <= green and tblue <= blue:
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chip = i
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i = i + 1
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# call the raw tcl script
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colors = SPACE.join(chips)
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tk.eval('setcolor %s {%s}' % (self.__canvas._w, colors))
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# move the arrows around
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self.__trackarrow(chip, (red, green, blue))
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def set(self, label, generator):
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self.__canvas.itemconfigure(self.__label, text=label)
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self.__generator = generator
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class StripViewer:
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def __init__(self, switchboard, master=None):
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self.__sb = switchboard
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optiondb = switchboard.optiondb()
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# create a frame inside the master.
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frame = Frame(master, relief=RAISED, borderwidth=1)
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frame.grid(row=1, column=0, columnspan=2, sticky='NSEW')
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# create the options to be used later
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uwd = self.__uwdvar = BooleanVar()
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uwd.set(optiondb.get('UPWHILEDRAG', 0))
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hexp = self.__hexpvar = BooleanVar()
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hexp.set(optiondb.get('HEXSTRIP', 0))
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# create the red, green, blue strips inside their own frame
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frame1 = Frame(frame)
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frame1.pack(expand=YES, fill=BOTH)
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self.__reds = StripWidget(switchboard, frame1,
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generator=constant_cyan_generator,
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axis=0,
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label='Red Variations',
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uwdvar=uwd, hexvar=hexp)
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self.__greens = StripWidget(switchboard, frame1,
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generator=constant_magenta_generator,
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axis=1,
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label='Green Variations',
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uwdvar=uwd, hexvar=hexp)
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self.__blues = StripWidget(switchboard, frame1,
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generator=constant_yellow_generator,
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axis=2,
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label='Blue Variations',
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uwdvar=uwd, hexvar=hexp)
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# create a frame to contain the controls
|
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frame2 = Frame(frame)
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frame2.pack(expand=YES, fill=BOTH)
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frame2.columnconfigure(0, weight=20)
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frame2.columnconfigure(2, weight=20)
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padx = 8
|
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|
# create the black button
|
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|
blackbtn = Button(frame2,
|
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|
text='Black',
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|
command=self.__toblack)
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|
blackbtn.grid(row=0, column=0, rowspan=2, sticky=W, padx=padx)
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|
|
# create the controls
|
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|
uwdbtn = Checkbutton(frame2,
|
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|
|
text='Update while dragging',
|
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|
|
variable=uwd)
|
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|
uwdbtn.grid(row=0, column=1, sticky=W)
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|
hexbtn = Checkbutton(frame2,
|
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|
|
text='Hexadecimal',
|
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|
|
variable=hexp,
|
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|
|
command=self.__togglehex)
|
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|
|
hexbtn.grid(row=1, column=1, sticky=W)
|
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|
|
# XXX: ignore this feature for now; it doesn't work quite right yet
|
|
|
|
|
|
|
|
|
|
|
|
## gentypevar = self.__gentypevar = IntVar()
|
|
|
|
|
|
## self.__variations = Radiobutton(frame,
|
|
|
|
|
|
## text='Variations',
|
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|
|
|
|
## variable=gentypevar,
|
|
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|
|
|
## value=0,
|
|
|
|
|
|
## command=self.__togglegentype)
|
|
|
|
|
|
## self.__variations.grid(row=0, column=1, sticky=W)
|
|
|
|
|
|
## self.__constants = Radiobutton(frame,
|
|
|
|
|
|
## text='Constants',
|
|
|
|
|
|
## variable=gentypevar,
|
|
|
|
|
|
## value=1,
|
|
|
|
|
|
## command=self.__togglegentype)
|
|
|
|
|
|
## self.__constants.grid(row=1, column=1, sticky=W)
|
|
|
|
|
|
|
|
|
|
|
|
# create the white button
|
|
|
|
|
|
whitebtn = Button(frame2,
|
|
|
|
|
|
text='White',
|
|
|
|
|
|
command=self.__towhite)
|
|
|
|
|
|
whitebtn.grid(row=0, column=2, rowspan=2, sticky=E, padx=padx)
|
|
|
|
|
|
|
|
|
|
|
|
def update_yourself(self, red, green, blue):
|
|
|
|
|
|
self.__reds.update_yourself(red, green, blue)
|
|
|
|
|
|
self.__greens.update_yourself(red, green, blue)
|
|
|
|
|
|
self.__blues.update_yourself(red, green, blue)
|
|
|
|
|
|
|
|
|
|
|
|
def __togglehex(self, event=None):
|
|
|
|
|
|
red, green, blue = self.__sb.current_rgb()
|
|
|
|
|
|
self.update_yourself(red, green, blue)
|
|
|
|
|
|
|
|
|
|
|
|
## def __togglegentype(self, event=None):
|
|
|
|
|
|
## which = self.__gentypevar.get()
|
|
|
|
|
|
## if which == 0:
|
|
|
|
|
|
## self.__reds.set(label='Red Variations',
|
|
|
|
|
|
## generator=constant_cyan_generator)
|
|
|
|
|
|
## self.__greens.set(label='Green Variations',
|
|
|
|
|
|
## generator=constant_magenta_generator)
|
|
|
|
|
|
## self.__blues.set(label='Blue Variations',
|
|
|
|
|
|
## generator=constant_yellow_generator)
|
|
|
|
|
|
## elif which == 1:
|
|
|
|
|
|
## self.__reds.set(label='Red Constant',
|
|
|
|
|
|
## generator=constant_red_generator)
|
|
|
|
|
|
## self.__greens.set(label='Green Constant',
|
|
|
|
|
|
## generator=constant_green_generator)
|
|
|
|
|
|
## self.__blues.set(label='Blue Constant',
|
|
|
|
|
|
## generator=constant_blue_generator)
|
|
|
|
|
|
## else:
|
|
|
|
|
|
## assert 0
|
|
|
|
|
|
## self.__sb.update_views_current()
|
|
|
|
|
|
|
|
|
|
|
|
def __toblack(self, event=None):
|
|
|
|
|
|
self.__sb.update_views(0, 0, 0)
|
|
|
|
|
|
|
|
|
|
|
|
def __towhite(self, event=None):
|
|
|
|
|
|
self.__sb.update_views(255, 255, 255)
|
|
|
|
|
|
|
|
|
|
|
|
def save_options(self, optiondb):
|
|
|
|
|
|
optiondb['UPWHILEDRAG'] = self.__uwdvar.get()
|
|
|
|
|
|
optiondb['HEXSTRIP'] = self.__hexpvar.get()
|
