dialog for getting a new config file section name

Lib/idlelib/configSectionNameDialog.py

+"""
+Dialog that allows user to specify a new config file section name.
+Used to get new highlight theme and keybinding set names.
+"""
+from Tkinter import *
+import tkMessageBox
+
+class GetCfgSectionNameDialog(Toplevel):
+    def __init__(self,parent,title,message,usedNames):
+        """
+        message - string, informational message to display
+        usedNames - list, list of names already in use for validity check
+        """
+        Toplevel.__init__(self, parent)
+        self.configure(borderwidth=5)
+        self.resizable(height=FALSE,width=FALSE)
+        self.title(title)
+        self.transient(parent)
+        self.grab_set()
+        self.protocol("WM_DELETE_WINDOW", self.Cancel)
+        self.parent = parent
+        self.message=message
+        self.usedNames=usedNames
+        self.result=''
+        self.CreateWidgets()
+        self.withdraw() #hide while setting geometry
+        self.update_idletasks()
+        #needs to be done here so that the winfo_reqwidth is valid
+        self.messageInfo.config(width=self.frameMain.winfo_reqwidth())
+        self.geometry("+%d+%d" % 
+            ((parent.winfo_rootx()+((parent.winfo_width()/2)
+                -(self.winfo_reqwidth()/2)),
+              parent.winfo_rooty()+((parent.winfo_height()/2)
+                -(self.winfo_reqheight()/2)) )) ) #centre dialog over parent
+        self.deiconify() #geometry set, unhide
+        self.wait_window()
+
+    def CreateWidgets(self):
+        self.name=StringVar(self)
+        self.fontSize=StringVar(self)
+        self.frameMain = Frame(self,borderwidth=2,relief=SUNKEN)
+        self.frameMain.pack(side=TOP,expand=TRUE,fill=BOTH)
+        self.messageInfo=Message(self.frameMain,anchor=W,justify=LEFT,padx=5,pady=5,
+                text=self.message)#,aspect=200)
+        entryName=Entry(self.frameMain,textvariable=self.name,width=30)
+        entryName.focus_set()
+        self.messageInfo.pack(padx=5,pady=5)#,expand=TRUE,fill=BOTH)
+        entryName.pack(padx=5,pady=5)
+        frameButtons=Frame(self)
+        frameButtons.pack(side=BOTTOM,fill=X)
+        self.buttonOk = Button(frameButtons,text='Ok',
+                width=8,command=self.Ok)
+        self.buttonOk.grid(row=0,column=0,padx=5,pady=5)
+        self.buttonCancel = Button(frameButtons,text='Cancel',
+                width=8,command=self.Cancel)
+        self.buttonCancel.grid(row=0,column=1,padx=5,pady=5)
+
+    def NameOk(self):
+        #simple validity check for a sensible 
+        #ConfigParser file section name
+        nameOk=1
+        name=self.name.get()
+        name.strip()
+        if not name: #no name specified
+            tkMessageBox.showerror(title='Name Error',
+                    message='No name specified.')
+            nameOk=0
+        elif len(name)>60: #name too long
+            tkMessageBox.showerror(title='Name Error',
+                    message='Name too long. Keep it to less than '+
+                    '60 characters.')
+            nameOk=0
+        elif name in self.usedNames:
+            tkMessageBox.showerror(title='Name Error',
+                    message='This name is already in use.')
+            nameOk=0
+        return nameOk
+    
+    def Ok(self, event=None):
+        if self.NameOk():
+            self.result=self.name.get()
+            self.destroy()
+        
+    def Cancel(self, event=None):
+        self.result=''
+        self.destroy()
+
+if __name__ == '__main__':
+    #test the dialog
+    root=Tk()
+    def run():
+        keySeq=''
+        dlg=GetCfgSectionNameDialog(root,'Get Name',
+                'The information here should need to be word wrapped. Test.')
+        print dlg.result
+    Button(root,text='Dialog',command=run).pack()
+    root.mainloop()
+    
+