cleaner tabbed-page mini implementation through classes

Lib/idlelib/tabpage.py

+##---------------------------------------------------------------------------##
+##
+## pyChing -- a Python program to cast and interpret I Ching hexagrams
+##
+## Copyright (C) 1999,2000 Stephen M. Gava
+##
+## This program is free software; you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation; either version 2 of the License, or
+## (at your option) any later version.
+##
+## This program is distributed in the hope that it will be of some
+## interest to somebody, but WITHOUT ANY WARRANTY; without even the 
+## implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+## See the GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with this program; see the file COPYING or COPYING.txt. If not, 
+##  write to the Free Software Foundation, Inc.,
+## 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+## The license can also be found at the GNU/FSF website: http://www.gnu.org
+##
+## Stephen M. Gava
+## <elguavas@users.sourceforge.net>
+## http://pyching.sourgeforge.net
+##
+##---------------------------------------------------------------------------##
+"""
+a couple of classes for implementing partial tabbed-page like behaviour
+"""
+
+from Tkinter import *
+
+class PageTab(Frame):
+    """
+    a 'page tab' like framed button
+    """ 
+    def __init__(self,parent):
+        Frame.__init__(self, parent,borderwidth=2,relief=RIDGE)
+        self.button=Radiobutton(self,padx=5,pady=5,takefocus=FALSE,
+                underline=0,indicatoron=FALSE,highlightthickness=0,
+                borderwidth=0,selectcolor=self.cget('bg'))
+        self.button.pack()
+      
+class TabPageSet(Frame):
+    """
+    a set of 'pages' with TabButtons for controlling their display
+    """ 
+    def __init__(self,parent,pageNames,**kw):
+        """
+        pageNames - a list of strings, each string will be the dictionary key
+        to a page's data, and the name displayed on the page's tab. Should be 
+        specified in desired page order. The first page will be the default 
+        and first active page.
+        """
+        Frame.__init__(self, parent, kw)
+        self.grid_location(0,0)
+        self.columnconfigure(0,weight=1)
+        self.rowconfigure(1,weight=1)
+        self.tabBar=Frame(self)
+        self.tabBar.grid(row=0,column=0,sticky=EW)
+        self.activePage=StringVar(self)
+        self.defaultPage=''
+        self.pages={}
+        for name in pageNames:
+            self.AddPage(name)
+
+    def ChangePage(self,pageName=None):
+        if pageName:
+            if pageName in self.pages.keys():
+                self.activePage.set(pageName)
+            else:
+                raise 'Invalid TabPage Name'
+        ## pop up the active 'tab' only
+        for page in self.pages.keys(): 
+            self.pages[page]['tab'].config(relief=RIDGE)
+        self.pages[self.GetActivePage()]['tab'].config(relief=RAISED)
+        ## switch page
+        self.pages[self.GetActivePage()]['page'].lift()
+        
+    def GetActivePage(self):
+        return self.activePage.get()
+
+    def AddPage(self,pageName):
+        if pageName in self.pages.keys():
+            raise 'TabPage Name Already Exists'
+        self.pages[pageName]={'tab':PageTab(self.tabBar),
+                'page':Frame(self,borderwidth=2,relief=RAISED)}
+        self.pages[pageName]['tab'].button.config(text=pageName,
+                command=self.ChangePage,variable=self.activePage,
+                value=pageName)
+        self.pages[pageName]['tab'].pack(side=LEFT)
+        self.pages[pageName]['page'].grid(row=1,column=0,sticky=NSEW)
+        if len(self.pages)==1: # adding first page    
+            self.defaultPage=pageName
+            self.activePage.set(self.defaultPage)
+            self.ChangePage()
+
+    def RemovePage(self,pageName):
+        if not pageName in self.pages.keys():
+            raise 'Invalid TabPage Name'
+        self.pages[pageName]['tab'].pack_forget()
+        self.pages[pageName]['page'].grid_forget()
+        self.pages[pageName]['tab'].destroy()
+        self.pages[pageName]['page'].destroy()
+        del(self.pages[pageName])
+        # handle removing last remaining, or default, or active page
+        if not self.pages: # removed last remaining page
+            self.defaultPage=''
+            return 
+        if pageName==self.defaultPage: # set a new default page
+            self.defaultPage=\
+                self.tabBar.winfo_children()[0].button.cget('text')
+        if pageName==self.GetActivePage(): # set a new active page 
+            self.activePage.set(self.defaultPage)
+        self.ChangePage()
+
+if __name__ == '__main__':
+    #test the dialog
+    root=Tk()
+    tabPage=TabPageSet(root,pageNames=['Foobar','Baz'])
+    tabPage.pack(expand=TRUE,fill=BOTH)
+    Label(tabPage.pages['Foobar']['page'],text='Foo',pady=20).pack()
+    Label(tabPage.pages['Foobar']['page'],text='Bar',pady=20).pack()
+    Label(tabPage.pages['Baz']['page'],text='Baz').pack()
+    entryPgName=Entry(root)
+    buttonAdd=Button(root,text='Add Page',
+            command=lambda:tabPage.AddPage(entryPgName.get()))
+    buttonRemove=Button(root,text='Remove Page',
+            command=lambda:tabPage.RemovePage(entryPgName.get()))
+    labelPgName=Label(root,text='name of page to add/remove:')
+    buttonAdd.pack(padx=5,pady=5)
+    buttonRemove.pack(padx=5,pady=5)
+    labelPgName.pack(padx=5)
+    entryPgName.pack(padx=5)
+    root.mainloop()
+