1# -*-mode: tcl; fill-column: 75; tab-width: 8; coding: iso-latin-1-unix -*-
2#
3#	$Id: Meter.tcl,v 1.4 2001/12/09 05:31:07 idiscovery Exp $
4#
5# Tix Demostration Program
6#
7# This sample program is structured in such a way so that it can be
8# executed from the Tix demo program "widget": it must have a
9# procedure called "RunSample". It should also have the "if" statment
10# at the end of this file so that it can be run as a standalone
11# program using tixwish.
12
13# This program demonstrates the use of the tixMeter widget -- it is
14# used to display the progress of a background job
15#
16
17proc RunSample {w} {
18    set top [frame $w.f -bd 1 -relief raised]
19    set box [tixButtonBox $w.b -bd 1 -relief raised]
20
21    pack $box -side bottom -fill both
22    pack $top -side top -fill both -expand yes
23
24    # Create the Meter and the Label
25    #
26    label $top.lab -text "Work in progress ...."
27    tixMeter $top.met -value 0 -text 0%
28
29    pack $top.lab -side top -padx 50 -pady 10 -anchor c
30    pack $top.met -side top -padx 50 -pady 10 -anchor c
31
32
33    # Create the buttons
34    #
35    $box add cancel  -text Cancel  -command "destroy $w" \
36	-width 6 -under 0
37    $box add restart -text Restart -width 6 -under 0
38
39    $box subwidget restart config -command \
40	"Meter:Start $top.met [$box subwidget cancel] [$box subwidget restart]"
41
42    $box subwidget restart invoke
43}
44
45proc Meter:Start {meter cancel restart} {
46    $restart config -state disabled
47    $cancel config -text Cancel
48    after 40 Meter:BackgroundJob $meter 0 $cancel $restart
49}
50
51proc Meter:BackgroundJob {meter progress cancel restart} {
52    if ![winfo exists $meter] {
53	# the window has already been destroyed
54	#
55	return
56    }
57
58    set progress [expr $progress + 0.02]
59    set text [expr int($progress*100.0)]%
60
61    $meter config -value $progress -text $text
62
63    if {$progress < 1.0} {
64	after 40 Meter:BackgroundJob $meter $progress $cancel $restart
65    } else {
66	$cancel config -text OK -under 0
67	$restart config -state normal
68    }
69}
70
71if {![info exists tix_demo_running]} {
72    wm withdraw .
73    set w .demo
74    toplevel $w; wm transient $w ""
75    RunSample $w
76    bind $w <Destroy> {if {"%W" == ".demo"} exit}
77}
78