# -*- mode: TCL; fill-column: 75; tab-width: 8; coding: iso-latin-1-unix -*-

#

#	$Id: Meter.tcl,v 1.3 2001/12/09 05:04:02 idiscovery Exp $

#

# Meter.tcl --

#

#	Implements the tixMeter widget

#

# Copyright (c) 1993-1999 Ioi Kim Lam.

# Copyright (c) 2000-2001 Tix Project Group.

#

# See the file "license.terms" for information on usage and redistribution

# of this file, and for a DISCLAIMER OF ALL WARRANTIES.

#

tixWidgetClass tixMeter {

    -classname TixMeter

    -superclass tixPrimitive

    -method {

    }

    -flag {

	-foreground -text -value

    }

    -configspec {

	{-fillcolor fillColor FillColor #8080ff}

	{-foreground foreground Foreground black}

	{-text text Text ""}

	{-value value Value 0}

    }

    -default {

	{.relief		sunken}

	{.borderWidth		2}

	{.width			150}

    }

}

proc tixMeter:InitWidgetRec {w} {

    upvar #0 $w data

    global env

    tixChainMethod $w InitWidgetRec

}

#----------------------------------------------------------------------

#		Construct widget

#----------------------------------------------------------------------

proc tixMeter:ConstructWidget {w} {

    upvar #0 $w data

    tixChainMethod $w ConstructWidget

    set data(w:canvas) [canvas $w.canvas]

    pack $data(w:canvas) -expand yes -fill both

    tixMeter:Update $w

}

proc tixMeter:SetBindings {w} {

    upvar #0 $w data

    tixChainMethod $w SetBindings

}

proc tixMeter:Update {w} {

    upvar #0 $w data

    # set the width of the canvas

    set W [expr $data(-width)-\

	([$data(w:root) cget -bd]+[$data(w:root) cget -highlightthickness]*2)]

    $data(w:canvas) config -width $W

    if {$data(-text) == ""} {

	set text [format "%d%%" [expr int($data(-value)*100)]]

    } else {

	set text $data(-text)

    }

    # (Create/Modify) the text item.

    #

    if {![info exists data(text)]} {

	set data(text) [$data(w:canvas) create text 0 0 -text $text]

    } else {

	$data(w:canvas) itemconfig $data(text) -text $text

    }

    set bbox [$data(w:canvas) bbox $data(text)]

    set itemW [expr [lindex $bbox 2]-[lindex $bbox 0]]

    set itemH [expr [lindex $bbox 3]-[lindex $bbox 1]]

    $data(w:canvas) coord $data(text) [expr $W/2] [expr $itemH/2+4]

    set H [expr $itemH + 4]

    $data(w:canvas) config -height [expr $H]

    set rectW [expr int($W*$data(-value))]

    if {![info exists data(rect)]} {

	set data(rect) [$data(w:canvas) create rectangle 0 0 $rectW 1000]

    } else {

	$data(w:canvas) coord $data(rect) 0 0 $rectW 1000

    }

    $data(w:canvas) itemconfig $data(rect) \

	-fill $data(-fillcolor) -outline $data(-fillcolor)

    $data(w:canvas) raise $data(text)

}

#----------------------------------------------------------------------

# Configuration

#----------------------------------------------------------------------

proc tixMeter:config-value {w value} {

    upvar #0 $w data

    set data(-value) $value

    tixMeter:Update $w

}

proc tixMeter:config-text {w value} {

    upvar #0 $w data

    set data(-text) $value

    tixMeter:Update $w

}

proc tixMeter:config-fillcolor {w value} {

    upvar #0 $w data

    set data(-fillcolor) $value

    tixMeter:Update $w

}