| 1 | """Chip viewer and widget.
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| 2 |
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| 3 | In the lower left corner of the main Pynche window, you will see two
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| 4 | ChipWidgets, one for the selected color and one for the nearest color. The
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| 5 | selected color is the actual RGB value expressed as an X11 #COLOR name. The
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| 6 | nearest color is the named color from the X11 database that is closest to the
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| 7 | selected color in 3D space. There may be other colors equally close, but the
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| 8 | nearest one is the first one found.
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| 9 |
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| 10 | Clicking on the nearest color chip selects that named color.
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| 11 |
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| 12 | The ChipViewer class includes the entire lower left quandrant; i.e. both the
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| 13 | selected and nearest ChipWidgets.
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| 14 | """
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| 15 |
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| 16 | from types import StringType
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| 17 | from Tkinter import *
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| 18 | import ColorDB
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| 19 |
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| 20 | |
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| 21 |
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| 22 | class ChipWidget:
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| 23 | _WIDTH = 150
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| 24 | _HEIGHT = 80
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| 25 |
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| 26 | def __init__(self,
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| 27 | master = None,
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| 28 | width = _WIDTH,
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| 29 | height = _HEIGHT,
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| 30 | text = 'Color',
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| 31 | initialcolor = 'blue',
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| 32 | presscmd = None,
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| 33 | releasecmd = None):
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| 34 | # create the text label
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| 35 | self.__label = Label(master, text=text)
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| 36 | self.__label.grid(row=0, column=0)
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| 37 | # create the color chip, implemented as a frame
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| 38 | self.__chip = Frame(master, relief=RAISED, borderwidth=2,
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| 39 | width=width,
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| 40 | height=height,
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| 41 | background=initialcolor)
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| 42 | self.__chip.grid(row=1, column=0)
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| 43 | # create the color name
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| 44 | self.__namevar = StringVar()
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| 45 | self.__namevar.set(initialcolor)
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| 46 | self.__name = Entry(master, textvariable=self.__namevar,
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| 47 | relief=FLAT, justify=CENTER, state=DISABLED,
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| 48 | font=self.__label['font'])
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| 49 | self.__name.grid(row=2, column=0)
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| 50 | # create the message area
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| 51 | self.__msgvar = StringVar()
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| 52 | self.__name = Entry(master, textvariable=self.__msgvar,
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| 53 | relief=FLAT, justify=CENTER, state=DISABLED,
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| 54 | font=self.__label['font'])
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| 55 | self.__name.grid(row=3, column=0)
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| 56 | # set bindings
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| 57 | if presscmd:
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| 58 | self.__chip.bind('<ButtonPress-1>', presscmd)
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| 59 | if releasecmd:
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| 60 | self.__chip.bind('<ButtonRelease-1>', releasecmd)
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| 61 |
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| 62 | def set_color(self, color):
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| 63 | self.__chip.config(background=color)
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| 64 |
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| 65 | def get_color(self):
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| 66 | return self.__chip['background']
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| 67 |
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| 68 | def set_name(self, colorname):
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| 69 | self.__namevar.set(colorname)
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| 70 |
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| 71 | def set_message(self, message):
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| 72 | self.__msgvar.set(message)
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| 73 |
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| 74 | def press(self):
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| 75 | self.__chip.configure(relief=SUNKEN)
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| 76 |
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| 77 | def release(self):
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| 78 | self.__chip.configure(relief=RAISED)
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| 79 |
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| 80 |
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| 81 | |
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| 82 |
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| 83 | class ChipViewer:
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| 84 | def __init__(self, switchboard, master=None):
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| 85 | self.__sb = switchboard
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| 86 | self.__frame = Frame(master, relief=RAISED, borderwidth=1)
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| 87 | self.__frame.grid(row=3, column=0, ipadx=5, sticky='NSEW')
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| 88 | # create the chip that will display the currently selected color
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| 89 | # exactly
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| 90 | self.__sframe = Frame(self.__frame)
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| 91 | self.__sframe.grid(row=0, column=0)
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| 92 | self.__selected = ChipWidget(self.__sframe, text='Selected')
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| 93 | # create the chip that will display the nearest real X11 color
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| 94 | # database color name
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| 95 | self.__nframe = Frame(self.__frame)
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| 96 | self.__nframe.grid(row=0, column=1)
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| 97 | self.__nearest = ChipWidget(self.__nframe, text='Nearest',
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| 98 | presscmd = self.__buttonpress,
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| 99 | releasecmd = self.__buttonrelease)
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| 100 |
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| 101 | def update_yourself(self, red, green, blue):
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| 102 | # Selected always shows the #rrggbb name of the color, nearest always
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| 103 | # shows the name of the nearest color in the database. BAW: should
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| 104 | # an exact match be indicated in some way?
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| 105 | #
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| 106 | # Always use the #rrggbb style to actually set the color, since we may
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| 107 | # not be using X color names (e.g. "web-safe" names)
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| 108 | colordb = self.__sb.colordb()
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| 109 | rgbtuple = (red, green, blue)
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| 110 | rrggbb = ColorDB.triplet_to_rrggbb(rgbtuple)
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| 111 | # find the nearest
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| 112 | nearest = colordb.nearest(red, green, blue)
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| 113 | nearest_tuple = colordb.find_byname(nearest)
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| 114 | nearest_rrggbb = ColorDB.triplet_to_rrggbb(nearest_tuple)
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| 115 | self.__selected.set_color(rrggbb)
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| 116 | self.__nearest.set_color(nearest_rrggbb)
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| 117 | # set the name and messages areas
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| 118 | self.__selected.set_name(rrggbb)
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| 119 | if rrggbb == nearest_rrggbb:
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| 120 | self.__selected.set_message(nearest)
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| 121 | else:
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| 122 | self.__selected.set_message('')
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| 123 | self.__nearest.set_name(nearest_rrggbb)
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| 124 | self.__nearest.set_message(nearest)
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| 125 |
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| 126 | def __buttonpress(self, event=None):
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| 127 | self.__nearest.press()
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| 128 |
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| 129 | def __buttonrelease(self, event=None):
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| 130 | self.__nearest.release()
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| 131 | rrggbb = self.__nearest.get_color()
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| 132 | red, green, blue = ColorDB.rrggbb_to_triplet(rrggbb)
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| 133 | self.__sb.update_views(red, green, blue)
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