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+#!/usr/local/bin/python
+#
+# $Id$
+#
+# Tix Demostration Program
+#
+# This sample program is structured in such a way so that it can be
+# executed from the Tix demo program "tixwidgets": 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 Tix
+
+def RunSample(w):
+ global demo_maker, demo_thrust, demo_num_engines
+
+ demo_maker = Tix.StringVar()
+ demo_thrust = Tix.DoubleVar()
+ demo_num_engines = Tix.IntVar()
+ demo_maker.set('P&W')
+ demo_thrust.set(20000.0)
+ demo_num_engines.set(2)
+
+ top = Tix.Frame(w, bd=1, relief=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 = 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 = 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 = 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=Tix.TOP, anchor=Tix.W)
+ b.pack(side=Tix.TOP, anchor=Tix.W)
+ c.pack(side=Tix.TOP, anchor=Tix.W)
+
+ box = Tix.ButtonBox(w, orientation=Tix.HORIZONTAL)
+ box.add('ok', text='Ok', underline=0, width=6,
+ command=lambda w=w: ok_command(w))
+ box.add('cancel', text='Cancel', underline=0, width=6,
+ command=lambda w=w: w.destroy())
+ box.pack(side=Tix.BOTTOM, fill=Tix.X)
+ top.pack(side=Tix.TOP, fill=Tix.BOTH, expand=1)
+
+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:
+ # Works here though. Why ? Beats me.
+ return maker_list[0]
+ # Works here though. Why ? Beats me.
+ return maker_list[i]
+
+def ok_command(w):
+ print "Selected", demo_num_engines.get(), "of", demo_maker.get(), " engines each of thrust", demo_thrust.get()
+ w.destroy()
+
+if __name__ == '__main__':
+ root = Tix.Tk()
+ RunSample(root)
+ root.mainloop()