#!/usr/bin/python
'''
   gui-sample.py
   Jeff Ondich, 28 Feb 2010

   This is a sample of a few important Tkinter concepts.

   -- Creating a root frame window to house the program.
   -- Putting a Frame in the root window, and sub-Frames in that.
   -- A few simple controls: a Button, some Label objects,
      and some Entry objects.
   -- A menu bar, including one menu item with an accelerator
      (i.e. a keyboard equivalent).
   -- A Canvas widget for drawing lines, circles, rectangles, etc.

   For some pretty good documentation of Tkinter, see
   http://effbot.org/tkinterbook/.
'''

import sys
from Tkinter import *

class MainFrame(Frame):
    def __init__(self, parent=None):
        # Call the constructor for the superclass.
        Frame.__init__(self, parent)

        # Fit this frame into the only row and column in the root window.
        self.grid(row=0, column=0, sticky=N+E+S+W)

        # This frame consists of one row and two columns.  The
        # right-hand column is twice as wide as the left.
        self.rowconfigure(0, weight=1)
        self.columnconfigure(0, weight=1)
        self.columnconfigure(1, weight=2)

        # Instantiate a frame for each of the columns, one
        # to hold the controls and the other to hold a Canvas.
        self.controlPane = ControlPane(self)
        self.canvasPane = CanvasPane(self)

        # 
        self.handleButtonClick()

        #self.bind_all('<Control-a>', self.addTransaction)
        #self.bind_all('<F1>', self.showPitchers)
        #self.bind_all('<Escape>', self.startNewPlayer)
        #self.bind_all('<Control-Up>', self.previousTeam)
        #self.bind_all('<Control-Down>', self.nextTeam)

    def handleButtonClick(self):
        formData = self.controlPane.getFormData()
        self.canvasPane.setColor(formData['red'], formData['green'], formData['blue'])

    def open(self):
        sys.stderr.write('open command\n')

class ControlPane(Frame):
    def __init__(self, parent):
        Frame.__init__(self, parent)
        self.parent = parent
        self.config(bd=2, relief=SUNKEN)
        self.grid(row=0, column=0, sticky=N+E+S+W)

        self.columnconfigure(0, pad=6, weight=1)
        self.columnconfigure(1, pad=6, weight=3)
        self.columnconfigure(2, pad=6, weight=1)
        self.rowconfigure(0, pad=6, weight=1)
        self.rowconfigure(1, pad=6, weight=1)
        self.rowconfigure(2, pad=6, weight=1)
        self.rowconfigure(3, pad=6, weight=1)

        Label(self, text='Red:').grid(row=0, column=0, sticky=W)
        self.redEntry = Entry(self)
        self.redEntry.insert(0, '0')
        self.redEntry.grid(row=0, column=1, sticky=E+W)

        Label(self, text='Green:').grid(row=1, column=0, sticky=W)
        self.greenEntry = Entry(self)
        self.greenEntry.insert(0, '0')
        self.greenEntry.grid(row=1, column=1, sticky=E+W)

        Label(self, text='Blue:').grid(row=2, column=0, sticky=W)
        self.blueEntry = Entry(self)
        self.blueEntry.insert(0, '0')
        self.blueEntry.grid(row=2, column=1, sticky=E+W)

        self.button = Button(self, command=self.parent.handleButtonClick, text='Go')
        self.button.grid(row=3, column=6, sticky=W)

    def getFormData(self):
        '''Returns a dictionary containing the data entered
           in the control pane's form.'''
        formData = {}

        formData['red'] = 0
        s = self.redEntry.get()
        if s.isdigit() and (0 <= int(s) <= 255):
            formData['red'] = int(s)

        formData['green'] = 0
        s = self.greenEntry.get()
        if s.isdigit() and (0 <= int(s) <= 255):
            formData['green'] = int(s)

        formData['blue'] = 0
        s = self.blueEntry.get()
        if s.isdigit() and (0 <= int(s) <= 255):
            formData['blue'] = int(s)

        return formData

class CanvasPane(Frame):
    def __init__(self, parent):
        Frame.__init__(self, parent)
        self.config(bd=2, relief=SUNKEN)
        self.grid(row=0, column=1, sticky=N+E+S+W)

        self.columnconfigure(0, pad=6, weight=1)
        self.rowconfigure(0, pad=6, weight=1)

        self.canvas = Canvas(self, borderwidth=2)
        self.canvas.pack()
        self.rectangleId = self.canvas.create_rectangle(100,100,150,150,fill='black')

    def setColor(self, red, green, blue):
        colorString = '#%02x%02x%02x' % (red, green, blue)
        self.canvas.itemconfig(self.rectangleId, fill=colorString)

def quit(*args):
    '''This function is here to give us an exit function with
       a signature suitable for use in a "bind" call (see below
       where we bind Command-x to quit).'''
    exit()

if __name__ == '__main__':
    # Set up the root frame window.
    root = Tk()
    root.title('Tkinter Sample')
    root.rowconfigure(0, weight=1)
    root.columnconfigure(0, weight=1)

    mainFrame = MainFrame(root)

    # Set up the menu bar with a single File menu.
    menuBar = Menu(root)
    root.config(menu=menuBar)

    fileMenu = Menu(menuBar, tearoff=0)
    fileMenu.add_command(label='Open', command=mainFrame.open)
    fileMenu.add_separator()
    fileMenu.add_command(label='Exit', command=quit, accelerator='Command-x')
    root.bind('<Command-x>', quit)
    menuBar.add_cascade(label='File', menu=fileMenu)

    # Let 'er rip.
    root.mainloop()