from Tkinter import *
from tkMessageBox import *

class N3AppGui:
    """ This is the gui that permits to manipulate a parameter file.
        Queries can be executed, modified, added and deleted.
    """

    bwidth = 15
    
    def __init__(self):
        self.root = Tk()
        self.frame = Frame(self.root)
        self.lbox = Listbox(self.frame, width = 100, height = 10)
        self.lbox.pack_propagate(0)
        self.scrolly = Scrollbar(self.lbox, command = self.lbox.yview,\
                                 orient = VERTICAL)
        self.lbox.configure(yscrollcommand = self.scrolly.set)
        self.scrollx = Scrollbar(self.lbox, command = self.lbox.xview,\
                                 orient = HORIZONTAL)
        self.lbox.configure(xscrollcommand = self.scrollx.set)
        self.scrolly.pack(side=RIGHT, fill = Y)
        self.scrollx.pack(side=BOTTOM, fill=X)
        self.lbox.pack(fill = BOTH)
        self.entry = Entry(self.frame, width = 100)
        self.entry.pack()
        self.button1 = Button(self.frame,text="Execute", command = self.execute,\
                              width = self.bwidth)
        self.button1.pack()
        self.button2 = Button(self.frame,text="Modify", command = self.modify,\
                              width = self.bwidth)
        self.button2.pack()
        self.button3 = Button(self.frame,text="Add", command = self.add,\
                              width = self.bwidth)
        self.button3.pack()
        self.button4 = Button(self.frame,text="Delete", command = self.delete,\
                              width = self.bwidth)
        self.button4.pack()
        self.button5 = Button(self.frame,text="Save", command = self.save,\
                              width = self.bwidth)
        self.button5.pack()
        self.button6 = Button(self.frame,text="Exit", command = "exit",\
                              width = self.bwidth)
        self.button6.pack()
        self.frame.pack()


    def modify(self):
        selected = self.lbox.curselection()
        nr = selected[0]
        string = self.lbox.get(nr)
        self.entry.delete(0,END)
        self.entry.insert(0,string)

    def execute(self):
        s = self.entry.get()
        if s == "":
            sel = self.lbox.curselection()
            if s == ():
                showinfo(message="There is no query to execute")
            else:
                s = self.lbox.get(sel[0])
        self.paramObj.executeQ(s)

    def fillBox(self, list):
        self.list = list
        for l in list:
            self.lbox.insert(END, l)

    def delete(self):
        sel = self.lbox.curselection()
        print "sell ", sel
        if sel == ():
            showinfo(message = "There is nothing selected to delete.")
        else:
            if askokcancel("RDFEngine","Do you really want to delete?"):
                self.lbox.delete(sel[0])

    def save(self):
        """ save the content of the listbox """
        list = self.lbox.get(0, END)
        s = self.paramObj.saveQ(list)
        showinfo(message = "The queries were saved to file " + s)
        
    def add(self):
        """ add the query in the Entry to the query file """
        s = self.entry.get()
        self.lbox.insert(END, s)

    def setParam(self, paramObj):
        self.paramObj = paramObj
        
if __name__ == "__main__":
    list = []
    list.append("[RDFE:query {:number :requested ?how}].aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa")
    list.append("[RDFE:query {?who :authenticated ?what}].")
    list.append("[RDFE:query {:number :requested ?how}].")
    list.append("[RDFE:query {?who :authenticated ?what}].")
    list.append("[RDFE:query {:number :requested ?how}].")
    list.append("[RDFE:query {?who :authenticated ?what}].")
    list.append("[RDFE:query {:number :requested ?how}].")
    list.append("[RDFE:query {?who :authenticated ?what}].")
    list.append("")

    gui = N3AppGui()
    gui.fillBox(list)