"""DetailsViewer class.

This class implements a pure input window which allows you to meticulously

edit the current color.  You have both mouse control of the color (via the

buttons along the bottom row), and there are keyboard bindings for each of the

increment/decrement buttons.

The top three check buttons allow you to specify which of the three color

variations are tied together when incrementing and decrementing.  Red, green,

and blue are self evident.  By tying together red and green, you can modify

the yellow level of the color.  By tying together red and blue, you can modify

the magenta level of the color.  By tying together green and blue, you can

modify the cyan level, and by tying all three together, you can modify the

grey level.

The behavior at the boundaries (0 and 255) are defined by the `At boundary'

option menu:

    Stop

        When the increment or decrement would send any of the tied variations

        out of bounds, the entire delta is discarded.

    Wrap Around

        When the increment or decrement would send any of the tied variations

        out of bounds, the out of bounds variation is wrapped around to the

        other side.  Thus if red were at 238 and 25 were added to it, red

        would have the value 7.

    Preseve Distance

        When the increment or decrement would send any of the tied variations

        out of bounds, all tied variations are wrapped as one, so as to

        preserve the distance between them.  Thus if green and blue were tied,

        and green was at 238 while blue was at 223, and an increment of 25

        were applied, green would be at 15 and blue would be at 0.

    Squash

        When the increment or decrement would send any of the tied variations

        out of bounds, the out of bounds variation is set to the ceiling of

        255 or floor of 0, as appropriate.  In this way, all tied variations

        are squashed to one edge or the other.

The following key bindings can be used as accelerators.  Note that Pynche can

fall behind if you hold the key down as a key repeat:

Left arrow == -1

Right arrow == +1

Control + Left == -10

Control + Right == 10

Shift + Left == -25

Shift + Right == +25

"""

from Tkinter import *

STOP = 'Stop'

WRAP = 'Wrap Around'

RATIO = 'Preserve Distance'

GRAV = 'Squash'

ADDTOVIEW = 'Details Window...'

class DetailsViewer:

    def __init__(self, switchboard, master=None):

        self.__sb = switchboard

        optiondb = switchboard.optiondb()

        self.__red, self.__green, self.__blue = switchboard.current_rgb()

        # GUI

        root = self.__root = Toplevel(master, class_='Pynche')

        root.protocol('WM_DELETE_WINDOW', self.withdraw)

        root.title('Pynche Details Window')

        root.iconname('Pynche Details Window')

        root.bind('<Alt-q>', self.__quit)

        root.bind('<Alt-Q>', self.__quit)

        root.bind('<Alt-w>', self.withdraw)

        root.bind('<Alt-W>', self.withdraw)

        # accelerators

        root.bind('<KeyPress-Left>', self.__minus1)

        root.bind('<KeyPress-Right>', self.__plus1)

        root.bind('<Control-KeyPress-Left>', self.__minus10)

        root.bind('<Control-KeyPress-Right>', self.__plus10)

        root.bind('<Shift-KeyPress-Left>', self.__minus25)

        root.bind('<Shift-KeyPress-Right>', self.__plus25)

        #

        # color ties

        frame = self.__frame = Frame(root)

        frame.pack(expand=YES, fill=X)

        self.__l1 = Label(frame, text='Move Sliders:')

        self.__l1.grid(row=1, column=0, sticky=E)

        self.__rvar = IntVar()

        self.__rvar.set(optiondb.get('RSLIDER', 4))

        self.__radio1 = Checkbutton(frame, text='Red',

                                    variable=self.__rvar,

                                    command=self.__effect,

                                    onvalue=4, offvalue=0)

        self.__radio1.grid(row=1, column=1, sticky=W)

        self.__gvar = IntVar()

        self.__gvar.set(optiondb.get('GSLIDER', 2))

        self.__radio2 = Checkbutton(frame, text='Green',

                                    variable=self.__gvar,

                                    command=self.__effect,

                                    onvalue=2, offvalue=0)

        self.__radio2.grid(row=2, column=1, sticky=W)

        self.__bvar = IntVar()

        self.__bvar.set(optiondb.get('BSLIDER', 1))

        self.__radio3 = Checkbutton(frame, text='Blue',

                                    variable=self.__bvar,

                                    command=self.__effect,

                                    onvalue=1, offvalue=0)

        self.__radio3.grid(row=3, column=1, sticky=W)

        self.__l2 = Label(frame)

        self.__l2.grid(row=4, column=1, sticky=W)

        self.__effect()

        #

        # Boundary behavior

        self.__l3 = Label(frame, text='At boundary:')

        self.__l3.grid(row=5, column=0, sticky=E)

        self.__boundvar = StringVar()

        self.__boundvar.set(optiondb.get('ATBOUND', STOP))

        self.__omenu = OptionMenu(frame, self.__boundvar,

                                  STOP, WRAP, RATIO, GRAV)

        self.__omenu.grid(row=5, column=1, sticky=W)

        self.__omenu.configure(width=17)

        #

        # Buttons

        frame = self.__btnframe = Frame(frame)

        frame.grid(row=0, column=0, columnspan=2, sticky='EW')

        self.__down25 = Button(frame, text='-25',

                               command=self.__minus25)

        self.__down10 = Button(frame, text='-10',

                               command=self.__minus10)

        self.__down1 = Button(frame, text='-1',

                              command=self.__minus1)

        self.__up1 = Button(frame, text='+1',

                            command=self.__plus1)

        self.__up10 = Button(frame, text='+10',

                             command=self.__plus10)

        self.__up25 = Button(frame, text='+25',

                             command=self.__plus25)

        self.__down25.pack(expand=YES, fill=X, side=LEFT)

        self.__down10.pack(expand=YES, fill=X, side=LEFT)

        self.__down1.pack(expand=YES, fill=X, side=LEFT)

        self.__up1.pack(expand=YES, fill=X, side=LEFT)

        self.__up10.pack(expand=YES, fill=X, side=LEFT)

        self.__up25.pack(expand=YES, fill=X, side=LEFT)

    def __effect(self, event=None):

        tie = self.__rvar.get() + self.__gvar.get() + self.__bvar.get()

        if tie in (0, 1, 2, 4):

            text = ''

        else:

            text = '(= %s Level)' % {3: 'Cyan',

                                     5: 'Magenta',

                                     6: 'Yellow',

                                     7: 'Grey'}[tie]

        self.__l2.configure(text=text)

    def __quit(self, event=None):

        self.__root.quit()

    def withdraw(self, event=None):

        self.__root.withdraw()

    def deiconify(self, event=None):

        self.__root.deiconify()

    def __minus25(self, event=None):

        self.__delta(-25)

    def __minus10(self, event=None):

        self.__delta(-10)

    def __minus1(self, event=None):

        self.__delta(-1)

    def __plus1(self, event=None):

        self.__delta(1)

    def __plus10(self, event=None):

        self.__delta(10)

    def __plus25(self, event=None):

        self.__delta(25)

    def __delta(self, delta):

        tie = []

        if self.__rvar.get():

            red = self.__red + delta

            tie.append(red)

        else:

            red = self.__red

        if self.__gvar.get():

            green = self.__green + delta

            tie.append(green)

        else:

            green = self.__green

        if self.__bvar.get():

            blue = self.__blue + delta

            tie.append(blue)

        else:

            blue = self.__blue

        # now apply at boundary behavior

        atbound = self.__boundvar.get()

        if atbound == STOP:

            if red < 0 or green < 0 or blue < 0 or \

               red > 255 or green > 255 or blue > 255:

                # then

                red, green, blue = self.__red, self.__green, self.__blue

        elif atbound == WRAP or (atbound == RATIO and len(tie) < 2):

            if red < 0:

                red += 256

            if green < 0:

                green += 256

            if blue < 0:

                blue += 256

            if red > 255:

                red -= 256

            if green > 255:

                green -= 256

            if blue > 255:

                blue -= 256

        elif atbound == RATIO:

            # for when 2 or 3 colors are tied together

            dir = 0

            for c in tie:

                if c < 0:

                    dir = -1

                elif c > 255:

                    dir = 1

            if dir == -1:

                delta = max(tie)

                if self.__rvar.get():

                    red = red + 255 - delta

                if self.__gvar.get():

                    green = green + 255 - delta

                if self.__bvar.get():

                    blue = blue + 255 - delta

            elif dir == 1:

                delta = min(tie)

                if self.__rvar.get():

                    red = red - delta

                if self.__gvar.get():

                    green = green - delta

                if self.__bvar.get():

                    blue = blue - delta

        elif atbound == GRAV:

            if red < 0:

                red = 0

            if green < 0:

                green = 0

            if blue < 0:

                blue = 0

            if red > 255:

                red = 255

            if green > 255:

                green = 255

            if blue > 255:

                blue = 255

        self.__sb.update_views(red, green, blue)

        self.__root.update_idletasks()

    def update_yourself(self, red, green, blue):

        self.__red = red

        self.__green = green

        self.__blue = blue

    def save_options(self, optiondb):

        optiondb['RSLIDER'] = self.__rvar.get()

        optiondb['GSLIDER'] = self.__gvar.get()

        optiondb['BSLIDER'] = self.__bvar.get()

        optiondb['ATBOUND'] = self.__boundvar.get()