from Tkinter import * class SearchDialogBase:     title = "Search Dialog"    icon = "Search"    needwrapbutton = 1     def __init__(self, root, engine):        self.root = root        self.engine = engine        self.top = None     def open(self, text, searchphrase=None):        self.text = text        if not self.top:            self.create_widgets()        else:            self.top.deiconify()            self.top.tkraise()        if searchphrase:            self.ent.delete(0,"end")            self.ent.insert("end",searchphrase)        self.ent.focus_set()        self.ent.selection_range(0, "end")        self.ent.icursor(0)        self.top.grab_set()     def close(self, event=None):        if self.top:            self.top.grab_release()            self.top.withdraw()     def create_widgets(self):        top = Toplevel(self.root)        top.bind("<Return>", self.default_command)        top.bind("<Escape>", self.close)        top.protocol("WM_DELETE_WINDOW", self.close)        top.wm_title(self.title)        top.wm_iconname(self.icon)        self.top = top         self.row = 0        self.top.grid_columnconfigure(0, pad=2, weight=0)        self.top.grid_columnconfigure(1, pad=2, minsize=100, weight=100)         self.create_entries()        self.create_option_buttons()        self.create_other_buttons()        return self.create_command_buttons()     def make_entry(self, label, var):        l = Label(self.top, text=label)        l.grid(row=self.row, column=0, sticky="nw")        e = Entry(self.top, textvariable=var, exportselection=0)        e.grid(row=self.row, column=1, sticky="nwe")        self.row = self.row + 1        return e     def make_frame(self,labeltext=None):        if labeltext:            l = Label(self.top, text=labeltext)            l.grid(row=self.row, column=0, sticky="nw")        f = Frame(self.top)        f.grid(row=self.row, column=1, columnspan=1, sticky="nwe")        self.row = self.row + 1        return f     def make_button(self, label, command, isdef=0):        b = Button(self.buttonframe,                   text=label, command=command,                   default=isdef and "active" or "normal")        cols,rows=self.buttonframe.grid_size()        b.grid(pady=1,row=rows,column=0,sticky="ew")        self.buttonframe.grid(rowspan=rows+1)        return b     def create_entries(self):        self.ent = self.make_entry("Find:", self.engine.patvar)     def create_option_buttons(self):        f = self.make_frame("Options")         btn = Checkbutton(f, anchor="w",                variable=self.engine.revar,                text="Regular expression")        btn.pack(side="left", fill="both")        if self.engine.isre():            btn.select()         btn = Checkbutton(f, anchor="w",                variable=self.engine.casevar,                text="Match case")        btn.pack(side="left", fill="both")        if self.engine.iscase():            btn.select()         btn = Checkbutton(f, anchor="w",                variable=self.engine.wordvar,                text="Whole word")        btn.pack(side="left", fill="both")        if self.engine.isword():            btn.select()         if self.needwrapbutton:            btn = Checkbutton(f, anchor="w",                    variable=self.engine.wrapvar,                    text="Wrap around")            btn.pack(side="left", fill="both")            if self.engine.iswrap():                btn.select()     def create_other_buttons(self):        f = self.make_frame("Direction")         #lbl = Label(f, text="Direction: ")        #lbl.pack(side="left")         btn = Radiobutton(f, anchor="w",                variable=self.engine.backvar, value=1,                text="Up")        btn.pack(side="left", fill="both")        if self.engine.isback():            btn.select()         btn = Radiobutton(f, anchor="w",                variable=self.engine.backvar, value=0,                text="Down")        btn.pack(side="left", fill="both")        if not self.engine.isback():            btn.select()     def create_command_buttons(self):        #        # place button frame on the right        f = self.buttonframe = Frame(self.top)        f.grid(row=0,column=2,padx=2,pady=2,ipadx=2,ipady=2)         b = self.make_button("close", self.close)        b.lower()