| 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: Control.py 36560 2004-07-18 06:16:08Z tim_one $
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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)
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