"""Simple text browser for IDLE

"""

from Tkinter import *

import tkMessageBox

class TextViewer(Toplevel):

    """A simple text viewer dialog for IDLE

    """

    def __init__(self, parent, title, text):

        """Show the given text in a scrollable window with a 'close' button

        """

        Toplevel.__init__(self, parent)

        self.configure(borderwidth=5)

        self.geometry("=%dx%d+%d+%d" % (625, 500,

                                        parent.winfo_rootx() + 10,

                                        parent.winfo_rooty() + 10))

        #elguavas - config placeholders til config stuff completed

        self.bg = '#ffffff'

        self.fg = '#000000'

        self.CreateWidgets()

        self.title(title)

        self.transient(parent)

        self.grab_set()

        self.protocol("WM_DELETE_WINDOW", self.Ok)

        self.parent = parent

        self.textView.focus_set()

        #key bindings for this dialog

        self.bind('<Return>',self.Ok) #dismiss dialog

        self.bind('<Escape>',self.Ok) #dismiss dialog

        self.textView.insert(0.0, text)

        self.textView.config(state=DISABLED)

        self.wait_window()

    def CreateWidgets(self):

        frameText = Frame(self, relief=SUNKEN, height=700)

        frameButtons = Frame(self)

        self.buttonOk = Button(frameButtons, text='Close',

                               command=self.Ok, takefocus=FALSE)

        self.scrollbarView = Scrollbar(frameText, orient=VERTICAL,

                                       takefocus=FALSE, highlightthickness=0)

        self.textView = Text(frameText, wrap=WORD, highlightthickness=0,

                             fg=self.fg, bg=self.bg)

        self.scrollbarView.config(command=self.textView.yview)

        self.textView.config(yscrollcommand=self.scrollbarView.set)

        self.buttonOk.pack()

        self.scrollbarView.pack(side=RIGHT,fill=Y)

        self.textView.pack(side=LEFT,expand=TRUE,fill=BOTH)

        frameButtons.pack(side=BOTTOM,fill=X)

        frameText.pack(side=TOP,expand=TRUE,fill=BOTH)

    def Ok(self, event=None):

        self.destroy()

def view_text(parent, title, text):

    TextViewer(parent, title, text)

def view_file(parent, title, filename, encoding=None):

    try:

        if encoding:

            import codecs

            textFile = codecs.open(filename, 'r')

        else:

            textFile = open(filename, 'r')

    except IOError:

        import tkMessageBox

        tkMessageBox.showerror(title='File Load Error',

                               message='Unable to load file %r .' % filename,

                               parent=parent)

    else:

        return view_text(parent, title, textFile.read())

if __name__ == '__main__':

    #test the dialog

    root=Tk()

    root.title('textView test')

    filename = './textView.py'

    text = file(filename, 'r').read()

    btn1 = Button(root, text='view_text',

                 command=lambda:view_text(root, 'view_text', text))

    btn1.pack(side=LEFT)

    btn2 = Button(root, text='view_file',

                  command=lambda:view_file(root, 'view_file', filename))

    btn2.pack(side=LEFT)

    close = Button(root, text='Close', command=root.destroy)

    close.pack(side=RIGHT)

    root.mainloop()