# Components_1.py for chapter 10 examples

from Tkinter   import *
from GUICommon import *
from Common    import *

class LED(GUICommon): 
    def __init__(self, master=None, width=25, height=25, 
                 appearance=FLAT,
                 status=STATUS_ON, bd=1, 
                 bg=None, 
                 shape=SQUARE, outline="",
                 blink=0, blinkrate=1,
                 orient=POINT_UP,
                 takefocus=0):
        # preserve attributes
        self.master       = master
        self.shape        = shape
        self.Colors       = [None, Color.OFF, Color.ON,
                             Color.WARN, Color.ALARM, '#00ffdd']
        self.status       = status
        self.blink        = blink
        self.blinkrate    = int(blinkrate)
        self.on           = 0
        self.onState      = None

        if not bg:
            bg = Color.PANEL

        ## Base frame to contain light
        self.led_frame=Frame(master, relief=appearance, bg=bg, bd=bd, 
                             takefocus=takefocus)

        basesize = width
        d = center = int(basesize/2)

        if self.shape == SQUARE:
            self.canvas=Canvas(self.led_frame, height=height, width=width, 
                               bg=bg, bd=0, highlightthickness=0)

            self.light=self.canvas.create_rectangle(0, 0, width, height,
                                                    fill=Color.ON)
        elif self.shape == ROUND:
            r = int((basesize-2)/2)
            self.canvas=Canvas(self.led_frame, width=width, height=width, 
                               highlightthickness=0, bg=bg, bd=0)
            if bd > 0:
                self.border=self.canvas.create_oval(center-r, center-r, 
                                                    center+r, center+r)
                r = r - bd
            self.light=self.canvas.create_oval(center-r-1, center-r-1, 
                                               center+r, center+r, 
                                               fill=Color.ON,
                                               outline=outline)
        else:  # Default is an ARROW
            self.canvas=Canvas(self.led_frame, width=width, height=width, 
                               highlightthickness=0, bg=bg, bd=0)
            x = d
            y = d
            VL = ARROW_HEAD_VERTICES[orient] 
            self.light=self.canvas.create_polygon(eval(VL[0]),
                              eval(VL[1]), eval(VL[2]), eval(VL[3]),
                              eval(VL[4]), eval(VL[5]), eval(VL[6]),
                              eval(VL[7]), outline = outline)

        self.canvas.pack(side=TOP, fill=X, expand=NO)
        self.update()

    def update(self):
        # First do the blink, if set to blink
        if self.blink:
            if self.on:
                if not self.onState:
                    self.onState = self.status
                self.status  = STATUS_OFF
                self.on      = 0                            
            else:
                if self.onState:
                    self.status = self.onState     # Current ON color
                self.on = 1

        # Set color for current status
        self.canvas.itemconfig(self.light, fill=self.Colors[self.status])

        self.canvas.update_idletasks()

        if self.blink:
            self.led_frame.after(self.blinkrate * 1000, self.update)

class Screen(GUICommon):
     def __init__(self, master, bg=Color.PANEL, height=1, width=1):
         self.screen_frame = Frame(master, width=width, height=height,
                                   bg=bg, bd=0)
         self.base = bg
         self.set_colors(self.screen_frame)
         radius = 4         # radius of an air hole
         ssize  = radius*3  # spacing between holes
         
         rows = int(height/ssize)
         cols = int(width/ssize)
                
         self.canvas = Canvas(self.screen_frame, height=height, width=width, 
                               bg=bg, bd=0, highlightthickness=0)

         self.canvas.pack(side=TOP, fill=BOTH, expand=NO)

         y = ssize - radius
         for r in range(rows):
             x0 = ssize -radius
             for c in range(cols):
                 x = x0 + (ssize*c)
                 self.canvas.create_oval(x-radius, y-radius,
                                         x+radius, y+radius,
                                         fill=self.dbase,
                                         outline=self.lbase)
             y = y + ssize

class PowerConnector:
    def __init__(self, master, bg=Color.PANEL):
        self.socket_frame = Frame(master, relief="raised", width=60,
	                  height=40,  bg=bg, bd=4)
	inside=Frame(self.socket_frame, relief="sunken", width=56,
                     height=36, bg=Color.INSIDE, bd=2)
	inside.place(relx=.5, rely=.5, anchor=CENTER)
	ground=Frame(inside, relief="raised", width=6, height=10,
		          bg=Color.CHROME, bd=2)
	ground.place(relx=.5, rely=.3, anchor=CENTER)
	p1=Frame(inside, relief="raised", width=6, height=10,
		          bg=Color.CHROME, bd=2)
	p1.place(relx=.25, rely=.7, anchor=CENTER)
	p2=Frame(inside, relief="raised", width=6, height=10,
		          bg=Color.CHROME, bd=2)
	p2.place(relx=.75, rely=.7, anchor=CENTER)

class PowerSwitch(GUICommon):
    def __init__(self, master, label='I   0', base=Color.PANEL):
        self.base = base
        self.set_colors(master)
        self.switch_frame = Frame(master, relief="raised", width=45,
	                  height=28, bg=self.vlbase, bd=4)
	switch = Frame(self.switch_frame, relief="sunken", width=32,
                       height=22, bg=self.base, bd=2)
	switch.place(relx=0.5, rely=0.5, anchor=CENTER)
	lbl=Label(switch, text=label, font=("Verdana", 10, "bold"), 
		       fg='white', bd=0, bg=self.dbase)
	lbl.place(relx=0.5, rely=0.5, anchor=CENTER)

class PowerSupply(GUICommon):
    def __init__(self, master, width=160, height=130, bg=Color.PANEL,
                 status=STATUS_ON): 
        self.base = bg
        self.set_colors(master)
        
        self.psu_frame = Frame(master, relief=SUNKEN, bg=self.dbase, bd=2, 
                               width=width, height=height)

	id=Label(self.psu_frame, text='DC OK', fg='white',
                 bg=self.dbase, font=('Verdana', 10, 'bold'), bd=0)
	id.place(relx=.8, rely=.15, anchor=CENTER)
	self.led = LED(self.psu_frame, height=12, width=12, shape=ROUND,
                       bg=self.dbase)
	self.led.led_frame.place(relx=0.8, rely=0.31, anchor=CENTER)
	lsub = Frame(self.psu_frame, width=width/1.2, height=height/2,
                     bg=self.dbase, bd=1, relief=GROOVE)
	lsub.place(relx=0.5, rely=0.68, anchor=CENTER)
	pwr=PowerConnector(lsub)
	pwr.socket_frame.place(relx=0.30, rely=0.5, anchor=CENTER)
	sw=PowerSwitch(lsub)
	sw.switch_frame.place(relx=0.75, rely=0.5, anchor=CENTER)
    
class Screw(GUICommon):
    def __init__(self, master, diameter=18, base="gray40", bg=Color.PANEL):
        self.base = base

	basesize = diameter+6
        self.screw_frame = Frame(master, relief="flat", bg=bg, bd=0, 
			  highlightthickness=0)
        self.set_colors(self.screw_frame)

	canvas=Canvas(self.screw_frame, width=basesize, height=basesize,
                      highlightthickness=0, bg=bg, bd=0)
	center = basesize/2
	r = diameter/2
        r2 = r - 4.0

	canvas.create_oval(center-r, center-r, center+r, center+r, 
                           fill=self.base, outline=self.lbase)
	canvas.create_rectangle(center-r2, center-0.2,
                                center+r2, center+0.2,
                                fill=self.dbase, width=0)
	canvas.create_rectangle(center-0.2, center-r2,
                                center+0.2, center+r2,
                                fill=self.dbase, width=0)
	canvas.pack(side="top", fill='x', expand='no')

class CardBlank(GUICommon):
    def __init__(self, master=None, width=20, height=396,
		 appearance="raised", bd=2, base=Color.CARD):
        self.base = base
        self.set_colors(master)
	self.card_frame=Frame(master, relief=appearance, height=height, 
                              width=width, bg=base, bd=bd)
	top_pull = CardPuller(self.card_frame, CARD_TOP, width=width)
	top_pull.puller_frame.place(relx=.5, rely=0, anchor=N)
	bottom_pull = CardPuller(self.card_frame, CARD_BOTTOM, width=width)
	bottom_pull.puller_frame.place(relx=.5, rely=1.0, anchor=S)

class CardPuller(GUICommon):
    def __init__(self, master, torb, width=20):
        self.base = master['background']
        self.set_colors(master)
	self.puller_frame=Frame(master, width=width, height=32,
                                bg=self.lbase, relief='flat')
	bar1=Frame(self.puller_frame, width=width/8, height=8,
                   bg=self.dbase)
	bar1.place(relx=1.0, rely=[1.0,0][torb], anchor=[SE,NE][torb])
	bar2=Frame(self.puller_frame, width=width/3, height=24,
                   bg=self.vdbase)
	bar2.place(relx=1.0, rely=[0,1.0][torb], anchor=[NE,SE][torb])
        screw = Screw(self.puller_frame, diameter=10, base=self.base,
                      bg=self.lbase)
        screw.screw_frame.place(relx=0.3, rely=[0.2,0.8][torb],
                                anchor=CENTER)
        
class Chassis:
    def __init__(self, master):
	self.outer=Frame(master, width=540, height=650, 
		          borderwidth=2, bg=Color.PANEL)
	self.outer.forget()  # We won't display until all
                             # the widgets have been created

        self.inner=Frame(self.outer, width=490, height=650, 
		          borderwidth=2, relief=RAISED, bg=Color.PANEL)
        self.inner.place(relx=0.5, rely=0.5, anchor=CENTER)
        
	self.rack = Frame(self.inner, bd=2, width=325, height=416,
                          bg=Color.CHASSIS)
	self.rack.place(relx=0.985, rely=0.853, anchor=SE)

        incr = 325/9
        x = 0.0
        for i in range(9):
            card =CardBlank(self.rack, width=incr-1, height=414)
            card.card_frame.place(x=x, y=0, anchor=NW)
            x = x + incr

	self.img = PhotoImage(file='images/logo.gif')
	self.logo=Label(self.outer, image=self.img, bd=0)
	self.logo.place(relx=0.055, rely=0.992, anchor=SW)

        for x in [0.02, 0.98]:
            for y in [0.0444, 0.3111, 0.6555, 0.9711]:
                screw = Screw(self.outer, base="gray50")
                screw.screw_frame.place(relx=x, rely=y, anchor=CENTER)

        self.psu1 = PowerSupply(self.inner)
        self.psu1.psu_frame.place(relx=0.99, rely=0.004, anchor=NE)
        self.psu2 = PowerSupply(self.inner)
        self.psu2.psu_frame.place(relx=0.65, rely=0.004, anchor=NE)

        self.psu2.led.turnoff()

        screen1 = Screen(self.inner, width=150, height=600, bg=Color.PANEL)
        screen1.screen_frame.place(relx=0.16, rely=0.475, anchor=CENTER)
        screen2 = Screen(self.inner, width=330, height=80, bg=Color.PANEL)
        screen2.screen_frame.place(relx=0.988, rely=0.989, anchor=SE)
