ref: 2f67e21393c25943f25e116fa6912b7d92dbca4e
dir: /sys/src/cmd/python/Demo/tix/samples/Control.py/
# -*-mode: python; fill-column: 75; tab-width: 8; coding: iso-latin-1-unix -*-
#
# $Id: Control.py 36560 2004-07-18 06:16:08Z tim_one $
#
# 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 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 = 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=self.okcmd)
box.add('cancel', text='Cancel', underline=0, width=6,
command=self.quitcmd)
box.pack(side=Tix.BOTTOM, fill=Tix.X)
top.pack(side=Tix.TOP, fill=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 = Tix.Tk()
RunSample(root)