Mercurial > cpython-lru_cache-weakref

annotate Lib/lib-tk/SimpleDialog.py @ 25838:8540887bcec6 2.2

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Backport of 2.183: Fix memory leak in add_subclass() found by NealN with valgrind.
author Guido van Rossum <guido@python.org>
date Fri, 18 Oct 2002 13:42:21 +0000
parents 9c37ed8868b9
children e02792112288 29be729b32c3
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1 """A simple but flexible modal dialog box."""
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2
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3
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4 from Tkinter import *
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5
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6
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7 class SimpleDialog:
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8
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9 def __init__(self, master,
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10 text='', buttons=[], default=None, cancel=None,
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11 title=None, class_=None):
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12 if class_:
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13 self.root = Toplevel(master, class_=class_)
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14 else:
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15 self.root = Toplevel(master)
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16 if title:
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17 self.root.title(title)
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18 self.root.iconname(title)
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19 self.message = Message(self.root, text=text, aspect=400)
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20 self.message.pack(expand=1, fill=BOTH)
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21 self.frame = Frame(self.root)
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22 self.frame.pack()
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23 self.num = default
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24 self.cancel = cancel
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25 self.default = default
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26 self.root.bind('<Return>', self.return_event)
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27 for num in range(len(buttons)):
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28 s = buttons[num]
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29 b = Button(self.frame, text=s,
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30 command=(lambda self=self, num=num: self.done(num)))
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31 if num == default:
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32 b.config(relief=RIDGE, borderwidth=8)
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33 b.pack(side=LEFT, fill=BOTH, expand=1)
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34 self.root.protocol('WM_DELETE_WINDOW', self.wm_delete_window)
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35 self._set_transient(master)
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36
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37 def _set_transient(self, master, relx=0.5, rely=0.3):
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38 widget = self.root
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39 widget.withdraw() # Remain invisible while we figure out the geometry
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40 widget.transient(master)
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41 widget.update_idletasks() # Actualize geometry information
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42 if master.winfo_ismapped():
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43 m_width = master.winfo_width()
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44 m_height = master.winfo_height()
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45 m_x = master.winfo_rootx()
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46 m_y = master.winfo_rooty()
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47 else:
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48 m_width = master.winfo_screenwidth()
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49 m_height = master.winfo_screenheight()
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50 m_x = m_y = 0
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51 w_width = widget.winfo_reqwidth()
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52 w_height = widget.winfo_reqheight()
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53 x = m_x + (m_width - w_width) * relx
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54 y = m_y + (m_height - w_height) * rely
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55 if x+w_width > master.winfo_screenwidth():
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56 x = master.winfo_screenwidth() - w_width
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57 elif x < 0:
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58 x = 0
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59 if y+w_height > master.winfo_screenheight():
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60 y = master.winfo_screenheight() - w_height
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61 elif y < 0:
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62 y = 0
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63 widget.geometry("+%d+%d" % (x, y))
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64 widget.deiconify() # Become visible at the desired location
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65
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66 def go(self):
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67 self.root.grab_set()
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68 self.root.mainloop()
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69 self.root.destroy()
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70 return self.num
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71
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72 def return_event(self, event):
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73 if self.default is None:
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74 self.root.bell()
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75 else:
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76 self.done(self.default)
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77
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78 def wm_delete_window(self):
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79 if self.cancel is None:
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80 self.root.bell()
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81 else:
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82 self.done(self.cancel)
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83
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84 def done(self, num):
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85 self.num = num
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86 self.root.quit()
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87
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88
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89 def test():
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90 root = Tk()
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91 def doit(root=root):
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92 d = SimpleDialog(root,
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93 text="This is a test dialog. "
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94 "Would this have been an actual dialog, "
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95 "the buttons below would have been glowing "
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96 "in soft pink light.\n"
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97 "Do you believe this?",
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98 buttons=["Yes", "No", "Cancel"],
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99 default=0,
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100 cancel=2,
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101 title="Test Dialog")
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102 print d.go()
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103 t = Button(root, text='Test', command=doit)
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104 t.pack()
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105 q = Button(root, text='Quit', command=t.quit)
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106 q.pack()
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107 t.mainloop()
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108
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109
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110 if __name__ == '__main__':
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111 test()