| # -*-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 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) |