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Text File  |  2004-08-23  |  4KB  |  113 lines
  1. """A simple but flexible modal dialog box."""
  2.  
  3.  
  4. from Tkinter import *
  5.  
  6.  
  7. class SimpleDialog:
  8.  
  9.     def __init__(self, master,
  10.                  text='', buttons=[], default=None, cancel=None,
  11.                  title=None, class_=None):
  12.         if class_:
  13.             self.root = Toplevel(master, class_=class_)
  14.         else:
  15.             self.root = Toplevel(master)
  16.         if title:
  17.             self.root.title(title)
  18.             self.root.iconname(title)
  19.         self.message = Message(self.root, text=text, aspect=400)
  20.         self.message.pack(expand=1, fill=BOTH)
  21.         self.frame = Frame(self.root)
  22.         self.frame.pack()
  23.         self.num = default
  24.         self.cancel = cancel
  25.         self.default = default
  26.         self.root.bind('<Return>', self.return_event)
  27.         for num in range(len(buttons)):
  28.             s = buttons[num]
  29.             b = Button(self.frame, text=s,
  30.                        command=(lambda self=self, num=num: self.done(num)))
  31.             if num == default:
  32.                 b.config(relief=RIDGE, borderwidth=8)
  33.             b.pack(side=LEFT, fill=BOTH, expand=1)
  34.         self.root.protocol('WM_DELETE_WINDOW', self.wm_delete_window)
  35.         self._set_transient(master)
  36.  
  37.     def _set_transient(self, master, relx=0.5, rely=0.3):
  38.         widget = self.root
  39.         widget.withdraw() # Remain invisible while we figure out the geometry
  40.         widget.transient(master)
  41.         widget.update_idletasks() # Actualize geometry information
  42.         if master.winfo_ismapped():
  43.             m_width = master.winfo_width()
  44.             m_height = master.winfo_height()
  45.             m_x = master.winfo_rootx()
  46.             m_y = master.winfo_rooty()
  47.         else:
  48.             m_width = master.winfo_screenwidth()
  49.             m_height = master.winfo_screenheight()
  50.             m_x = m_y = 0
  51.         w_width = widget.winfo_reqwidth()
  52.         w_height = widget.winfo_reqheight()
  53.         x = m_x + (m_width - w_width) * relx
  54.         y = m_y + (m_height - w_height) * rely
  55.         if x+w_width > master.winfo_screenwidth():
  56.             x = master.winfo_screenwidth() - w_width
  57.         elif x < 0:
  58.             x = 0
  59.         if y+w_height > master.winfo_screenheight():
  60.             y = master.winfo_screenheight() - w_height
  61.         elif y < 0:
  62.             y = 0
  63.         widget.geometry("+%d+%d" % (x, y))
  64.         widget.deiconify() # Become visible at the desired location
  65.  
  66.     def go(self):
  67.         self.root.wait_visibility()
  68.         self.root.grab_set()
  69.         self.root.mainloop()
  70.         self.root.destroy()
  71.         return self.num
  72.  
  73.     def return_event(self, event):
  74.         if self.default is None:
  75.             self.root.bell()
  76.         else:
  77.             self.done(self.default)
  78.  
  79.     def wm_delete_window(self):
  80.         if self.cancel is None:
  81.             self.root.bell()
  82.         else:
  83.             self.done(self.cancel)
  84.  
  85.     def done(self, num):
  86.         self.num = num
  87.         self.root.quit()
  88.  
  89.  
  90. if __name__ == '__main__':
  91.  
  92.     def test():
  93.         root = Tk()
  94.         def doit(root=root):
  95.             d = SimpleDialog(root,
  96.                          text="This is a test dialog.  "
  97.                               "Would this have been an actual dialog, "
  98.                               "the buttons below would have been glowing "
  99.                               "in soft pink light.\n"
  100.                               "Do you believe this?",
  101.                          buttons=["Yes", "No", "Cancel"],
  102.                          default=0,
  103.                          cancel=2,
  104.                          title="Test Dialog")
  105.             print d.go()
  106.         t = Button(root, text='Test', command=doit)
  107.         t.pack()
  108.         q = Button(root, text='Quit', command=t.quit)
  109.         q.pack()
  110.         t.mainloop()
  111.  
  112.     test()
  113.