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-# -*-mode: python; fill-column: 75; tab-width: 8; coding: iso-latin-1-unix -*-
-#
-# $Id$
-#
-# Tix Demostration Program
-#
-# This sample program is structured in such a way so that it can be
-# executed from the Tix demo program "tixwidgets.py": it must have a
-# procedure called "RunSample". It should also have the "if" statment
-# at the end of this file so that it can be run as a standalone
-# program.
-
-# This file demonstrates the use of the tixControl widget -- it is an
-# entry widget with up/down arrow buttons. You can use the arrow buttons
-# to adjust the value inside the entry widget.
-#
-# This example program uses three Control widgets. One lets you select
-# integer values; one lets you select floating point values and the last
-# one lets you select a few names.
-
-import tkinter.tix
-
-TCL_ALL_EVENTS = 0
-
-def RunSample (root):
- control = DemoControl(root)
- control.mainloop()
- control.destroy()
-
-class DemoControl:
- def __init__(self, w):
- self.root = w
- self.exit = -1
-
- global demo_maker, demo_thrust, demo_num_engines
-
- demo_maker = tkinter.tix.StringVar()
- demo_thrust = tkinter.tix.DoubleVar()
- demo_num_engines = tkinter.tix.IntVar()
- demo_maker.set('P&W')
- demo_thrust.set(20000.0)
- demo_num_engines.set(2)
-
- top = tkinter.tix.Frame(w, bd=1, relief=tkinter.tix.RAISED)
-
- # $w.top.a allows only integer values
- #
- # [Hint] The -options switch sets the options of the subwidgets.
- # [Hint] We set the label.width subwidget option of the Controls to
- # be 16 so that their labels appear to be aligned.
- #
- a = tkinter.tix.Control(top, label='Number of Engines: ', integer=1,
- variable=demo_num_engines, min=1, max=4,
- options='entry.width 10 label.width 20 label.anchor e')
-
- b = tkinter.tix.Control(top, label='Thrust: ', integer=0,
- min='10000.0', max='60000.0', step=500,
- variable=demo_thrust,
- options='entry.width 10 label.width 20 label.anchor e')
-
- c = tkinter.tix.Control(top, label='Engine Maker: ', value='P&W',
- variable=demo_maker,
- options='entry.width 10 label.width 20 label.anchor e')
-
- # We can't define these in the init because the widget 'c' doesn't
- # exist yet and we need to reference it
- c['incrcmd'] = lambda w=c: adjust_maker(w, 1)
- c['decrcmd'] = lambda w=c: adjust_maker(w, -1)
- c['validatecmd'] = lambda w=c: validate_maker(w)
-
- a.pack(side=tkinter.tix.TOP, anchor=tkinter.tix.W)
- b.pack(side=tkinter.tix.TOP, anchor=tkinter.tix.W)
- c.pack(side=tkinter.tix.TOP, anchor=tkinter.tix.W)
-
- box = tkinter.tix.ButtonBox(w, orientation=tkinter.tix.HORIZONTAL)
- box.add('ok', text='Ok', underline=0, width=6,
- command=self.okcmd)
- box.add('cancel', text='Cancel', underline=0, width=6,
- command=self.quitcmd)
- box.pack(side=tkinter.tix.BOTTOM, fill=tkinter.tix.X)
- top.pack(side=tkinter.tix.TOP, fill=tkinter.tix.BOTH, expand=1)
-
- def okcmd (self):
- # tixDemo:Status "Selected %d of %s engines each of thrust %d", (demo_num_engines.get(), demo_maker.get(), demo_thrust.get())
- self.quitcmd()
-
- def quitcmd (self):
- self.exit = 0
-
- def mainloop(self):
- while self.exit < 0:
- self.root.tk.dooneevent(TCL_ALL_EVENTS)
-
- def destroy (self):
- self.root.destroy()
-
-maker_list = ['P&W', 'GE', 'Rolls Royce']
-
-def adjust_maker(w, inc):
- i = maker_list.index(demo_maker.get())
- i = i + inc
- if i >= len(maker_list):
- i = 0
- elif i < 0:
- i = len(maker_list) - 1
-
- # In Tcl/Tix we should return the string maker_list[i]. We can't
- # do that in Tkinter so we set the global variable. (This works).
- demo_maker.set(maker_list[i])
-
-def validate_maker(w):
- try:
- i = maker_list.index(demo_maker.get())
- except ValueError:
- # Works here though. Why ? Beats me.
- return maker_list[0]
- # Works here though. Why ? Beats me.
- return maker_list[i]
-
-if __name__ == '__main__':
- root = tkinter.tix.Tk()
- RunSample(root)