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  "   ˆl–Ým_JJh¥ ² ¸È®6Ò˜´oÇƒqÆž¿Å ø    """ListViewer class.

This class implements an input/output view on the color model.  It lists every
unique color (e.g. unique r/g/b value) found in the color database.  Each
color is shown by small swatch and primary color name.  Some colors have
aliases -- more than one name for the same r/g/b value.  These aliases are
displayed in the small listbox at the bottom of the screen.

Clicking on a color name or swatch selects that color and updates all other
windows.  When a color is selected in a different viewer, the color list is
scrolled to the selected color and it is highlighted.  If the selected color
is an r/g/b value without a name, no scrolling occurs.

You can turn off Update On Click if all you want to see is the alias for a
given name, without selecting the color.
"""

from Tkinter import *
import ColorDB

ADDTOVIEW = 'Color %List Window...'

class ListViewer:
    def __init__(self, switchboard, master=None):
        self.__sb = switchboard
        optiondb = switchboard.optiondb()
        self.__lastbox = None
        self.__dontcenter = 0
        # GUI
        root = self.__root = Toplevel(master, class_='Pynche')
        root.protocol('WM_DELETE_WINDOW', self.withdraw)
        root.title('Pynche Color List')
        root.iconname('Pynche Color List')
        root.bind('<Alt-q>', self.__quit)
        root.bind('<Alt-Q>', self.__quit)
        root.bind('<Alt-w>', self.withdraw)
        root.bind('<Alt-W>', self.withdraw)
        #
        # create the canvas which holds everything, and its scrollbar
        #
        frame = self.__frame = Frame(root)
        frame.pack()
        canvas = self.__canvas = Canvas(frame, width=160, height=300,
                                        borderwidth=2, relief=SUNKEN)
        self.__scrollbar = Scrollbar(frame)
        self.__scrollbar.pack(fill=Y, side=RIGHT)
        canvas.pack(fill=BOTH, expand=1)
        canvas.configure(yscrollcommand=(self.__scrollbar, 'set'))
        self.__scrollbar.configure(command=(canvas, 'yview'))
        self.__populate()
        #
        # Update on click
        self.__uoc = BooleanVar()
        self.__uoc.set(optiondb.get('UPONCLICK', 1))
        self.__uocbtn = Checkbutton(root,
                                    text='Update on Click',
                                    variable=self.__uoc,
                                    command=self.__toggleupdate)
        self.__uocbtn.pack(expand=1, fill=BOTH)
        #
        # alias list
        self.__alabel = Label(root, text='Aliases:')
        self.__alabel.pack()
        self.__aliases = Listbox(root, height=5,
                                 selectmode=BROWSE)
        self.__aliases.pack(expand=1, fill=BOTH)

    def __populate(self):
        #
        # create all the buttons
        colordb = self.__sb.colordb()
        canvas = self.__canvas
        row = 0
        widest = 0
        bboxes = self.__bboxes = []
        for name in colordb.unique_names():
            exactcolor = ColorDB.triplet_to_rrggbb(colordb.find_byname(name))
            canvas.create_rectangle(5, row*20 + 5,
                                    20, row*20 + 20,
                                    fill=exactcolor)
            textid = canvas.create_text(25, row*20 + 13,
                                        text=name,
                                        anchor=W)
            x1, y1, textend, y2 = canvas.bbox(textid)
            boxid = canvas.create_rectangle(3, row*20+3,
                                            textend+3, row*20 + 23,
                                            outline='',
                                            tags=(exactcolor, 'all'))
            canvas.bind('<ButtonRelease>', self.__onrelease)
            bboxes.append(boxid)
            if textend+3 > widest:
                widest = textend+3
            row += 1
        canvheight = (row-1)*20 + 25
        canvas.config(scrollregion=(0, 0, 150, canvheight))
        for box in bboxes:
            x1, y1, x2, y2 = canvas.coords(box)
            canvas.coords(box, x