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annotate Demo/tix/samples/Control.py @ 79675:c0a2294de787 2.7

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Issue #16199: Backport 2to3 typo fix from 3.2.
author Chris Jerdonek <chris.jerdonek@gmail.com>
date Thu, 11 Oct 2012 16:15:46 -0700
parents c3a096bfbd6b
children c25e5b620a4c
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 # -*-mode: python; fill-column: 75; tab-width: 8; coding: iso-latin-1-unix -*-
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2 #
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3 # $Id$
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4 #
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5 # Tix Demostration Program
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6 #
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7 # This sample program is structured in such a way so that it can be
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8 # executed from the Tix demo program "tixwidgets.py": it must have a
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9 # procedure called "RunSample". It should also have the "if" statment
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10 # at the end of this file so that it can be run as a standalone
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11 # program.
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12
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13 # This file demonstrates the use of the tixControl widget -- it is an
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14 # entry widget with up/down arrow buttons. You can use the arrow buttons
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15 # to adjust the value inside the entry widget.
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16 #
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17 # This example program uses three Control widgets. One lets you select
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18 # integer values; one lets you select floating point values and the last
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19 # one lets you select a few names.
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20
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21 import Tix
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22
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23 TCL_ALL_EVENTS = 0
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24
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25 def RunSample (root):
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26 control = DemoControl(root)
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27 control.mainloop()
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28 control.destroy()
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29
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30 class DemoControl:
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31 def __init__(self, w):
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32 self.root = w
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33 self.exit = -1
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34
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35 global demo_maker, demo_thrust, demo_num_engines
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36
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37 demo_maker = Tix.StringVar()
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38 demo_thrust = Tix.DoubleVar()
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39 demo_num_engines = Tix.IntVar()
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40 demo_maker.set('P&W')
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41 demo_thrust.set(20000.0)
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42 demo_num_engines.set(2)
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43
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44 top = Tix.Frame(w, bd=1, relief=Tix.RAISED)
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45
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46 # $w.top.a allows only integer values
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47 #
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48 # [Hint] The -options switch sets the options of the subwidgets.
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49 # [Hint] We set the label.width subwidget option of the Controls to
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50 # be 16 so that their labels appear to be aligned.
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51 #
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52 a = Tix.Control(top, label='Number of Engines: ', integer=1,
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53 variable=demo_num_engines, min=1, max=4,
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54 options='entry.width 10 label.width 20 label.anchor e')
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55
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56 b = Tix.Control(top, label='Thrust: ', integer=0,
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57 min='10000.0', max='60000.0', step=500,
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58 variable=demo_thrust,
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59 options='entry.width 10 label.width 20 label.anchor e')
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60
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61 c = Tix.Control(top, label='Engine Maker: ', value='P&W',
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62 variable=demo_maker,
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63 options='entry.width 10 label.width 20 label.anchor e')
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64
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65 # We can't define these in the init because the widget 'c' doesn't
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66 # exist yet and we need to reference it
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67 c['incrcmd'] = lambda w=c: adjust_maker(w, 1)
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68 c['decrcmd'] = lambda w=c: adjust_maker(w, -1)
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69 c['validatecmd'] = lambda w=c: validate_maker(w)
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70
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71 a.pack(side=Tix.TOP, anchor=Tix.W)
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72 b.pack(side=Tix.TOP, anchor=Tix.W)
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73 c.pack(side=Tix.TOP, anchor=Tix.W)
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74
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75 box = Tix.ButtonBox(w, orientation=Tix.HORIZONTAL)
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76 box.add('ok', text='Ok', underline=0, width=6,
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77 command=self.okcmd)
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78 box.add('cancel', text='Cancel', underline=0, width=6,
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79 command=self.quitcmd)
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80 box.pack(side=Tix.BOTTOM, fill=Tix.X)
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81 top.pack(side=Tix.TOP, fill=Tix.BOTH, expand=1)
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82
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83 def okcmd (self):
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84 # tixDemo:Status "Selected %d of %s engines each of thrust %d", (demo_num_engines.get(), demo_maker.get(), demo_thrust.get())
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85 self.quitcmd()
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86
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87 def quitcmd (self):
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88 self.exit = 0
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89
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90 def mainloop(self):
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91 while self.exit < 0:
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92 self.root.tk.dooneevent(TCL_ALL_EVENTS)
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93
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94 def destroy (self):
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95 self.root.destroy()
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96
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97 maker_list = ['P&W', 'GE', 'Rolls Royce']
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98
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99 def adjust_maker(w, inc):
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100 i = maker_list.index(demo_maker.get())
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101 i = i + inc
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102 if i >= len(maker_list):
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103 i = 0
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104 elif i < 0:
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105 i = len(maker_list) - 1
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106
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107 # In Tcl/Tix we should return the string maker_list[i]. We can't
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108 # do that in Tkinter so we set the global variable. (This works).
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109 demo_maker.set(maker_list[i])
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110
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111 def validate_maker(w):
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112 try:
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113 i = maker_list.index(demo_maker.get())
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114 except ValueError:
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115 # Works here though. Why ? Beats me.
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116 return maker_list[0]
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117 # Works here though. Why ? Beats me.
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118 return maker_list[i]
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119
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120 if __name__ == '__main__':
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121 root = Tix.Tk()
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122 RunSample(root)