# Spintime 
# ----------------------------------------------------------------------
# Implements a Time spinner widget.  A time spinner contains three
# integer spinners:  one for hours, one for minutes and one for
# seconds.  Options exist to manage to behavior, appearance, and
# format of each component spinner.
#
# ----------------------------------------------------------------------
#  AUTHOR: Sue Yockey                  EMAIL: yockey@actc.com
#          Mark L. Ulferts                    mulferts@austin.dsccc.com
#
#   @(#) $Id: spintime.itk,v 1.2 1999/01/27 18:56:36 jingham Exp $
# ----------------------------------------------------------------------
#            Copyright (c) 1997 DSC Technologies Corporation
# ======================================================================
# Permission to use, copy, modify, distribute and license this software 
# and its documentation for any purpose, and without fee or written 
# agreement with DSC, is hereby granted, provided that the above copyright 
# notice appears in all copies and that both the copyright notice and 
# warranty disclaimer below appear in supporting documentation, and that 
# the names of DSC Technologies Corporation or DSC Communications 
# Corporation not be used in advertising or publicity pertaining to the 
# software without specific, written prior permission.
# 
# DSC DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING 
# ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, AND NON-
# INFRINGEMENT. THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, AND THE
# AUTHORS AND DISTRIBUTORS HAVE NO OBLIGATION TO PROVIDE MAINTENANCE, 
# SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. IN NO EVENT SHALL 
# DSC BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR 
# ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, 
# WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTUOUS ACTION,
# ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS 
# SOFTWARE.
# ======================================================================

#
# Default resources.
#
option add *Spintime.hourLabel "Hour" widgetDefault
option add *Spintime.minuteLabel "Minute" widgetDefault
option add *Spintime.secondLabel "Second" widgetDefault
option add *Spintime.hourWidth 3 widgetDefault
option add *Spintime.minuteWidth 3 widgetDefault
option add *Spintime.secondWidth 3 widgetDefault

#
# Usual options.
#
itk::usual Spintime {
    keep -background -cursor -foreground -labelfont -textbackground -textfont
}

# ------------------------------------------------------------------
#                            SPINTIME
# ------------------------------------------------------------------
class iwidgets::Spintime {
    inherit itk::Widget 
    
    constructor {args} {}
    destructor {}

    itk_option define -orient orient Orient vertical 
    itk_option define -labelpos labelPos Position w 
    itk_option define -houron hourOn HourOn true 
    itk_option define -minuteon minuteOn MinuteOn true 
    itk_option define -secondon secondOn SecondOn true 
    itk_option define -timemargin timeMargin Margin 1 
    itk_option define -militaryon militaryOn MilitaryOn true 

    public {
	method get {{format "-string"}} 
	method show {{date now}}
    }
    
    protected {
	method _packTime {{when later}}
	method _down60 {comp}

	variable _repack {}             ;# Reconfiguration flag.
	variable _interior
    }
}

#
# Provide a lowercased access method for the Spintime class.
# 
proc ::iwidgets::spintime {pathName args} {
    uplevel ::iwidgets::Spintime $pathName $args
}

# ------------------------------------------------------------------
#                        CONSTRUCTOR
# ------------------------------------------------------------------
body iwidgets::Spintime::constructor {args} {
    set _interior $itk_interior
    set clicks [clock seconds]

    #
    # Create Hour Spinner
    #
    itk_component add hour {
	iwidgets::Spinint $itk_interior.hour -fixed 2 -range {0 23} -justify right
    } {
	keep -background -cursor -arroworient -foreground \
		-labelfont -labelmargin -relief -textbackground \
		-textfont -repeatdelay -repeatinterval

	rename -labeltext -hourlabel hourLabel Text
	rename -width -hourwidth hourWidth Width
    }
    
    #
    # Take off the default bindings for selction and motion.
    #
    bind [$itk_component(hour) component entry] <1> {break}
    bind [$itk_component(hour) component entry] <Button1-Motion> {break}

    #
    # Create Minute Spinner
    #
    itk_component add minute {
	iwidgets::Spinint $itk_interior.minute \
		-decrement [code $this _down60 minute] \
		-fixed 2 -range {0 59} -justify right
    } {
	keep -background -cursor -arroworient -foreground \
		-labelfont -labelmargin -relief -textbackground \
		-textfont -repeatdelay -repeatinterval

	rename -labeltext -minutelabel minuteLabel Text
	rename -width -minutewidth minuteWidth Width
    }
    
    #
    # Take off the default bindings for selction and motion.
    #
    bind [$itk_component(minute) component entry] <1> {break}
    bind [$itk_component(minute) component entry] <Button1-Motion> {break}

    #
    # Create Second Spinner
    #
    itk_component add second {
	iwidgets::Spinint $itk_interior.second  \
		-decrement [code $this _down60 second] \
		-fixed 2 -range {0 59} -justify right
    } {
	keep -background -cursor -arroworient -foreground \
		-labelfont -labelmargin -relief -textbackground \
		-textfont -repeatdelay -repeatinterval

	rename -labeltext -secondlabel secondLabel Text
	rename -width -secondwidth secondWidth Width
    }

    #
    # Take off the default bindings for selction and motion.
    #
    bind [$itk_component(second) component entry] <1> {break}
    bind [$itk_component(second) component entry] <Button1-Motion> {break}

    #
    # Initialize the widget based on the command line options.
    #
    eval itk_initialize $args

    # 
    # Show the current time.
    #
    show now
}
	
# ------------------------------------------------------------------
#                           DESTRUCTOR
# ------------------------------------------------------------------
body iwidgets::Spintime::destructor {} {
    if {$_repack != ""} {after cancel $_repack}
}

# ------------------------------------------------------------------
#                             OPTIONS
# ------------------------------------------------------------------

# ------------------------------------------------------------------
# OPTION: -orient
# 
# Specifies the orientation of the 3 spinners for Hour, Minute 
# and second.
# ------------------------------------------------------------------
configbody iwidgets::Spintime::orient {
    _packTime
}

# ------------------------------------------------------------------
# OPTION: -labelpos
# 
# Specifies the location of all 3 spinners' labels. 
# Overloaded 
# ------------------------------------------------------------------
configbody iwidgets::Spintime::labelpos {
    switch $itk_option(-labelpos) {
	n {
	    $itk_component(hour) configure -labelpos n
	    $itk_component(minute) configure -labelpos n
	    $itk_component(second) configure -labelpos n
	    
	    #
	    # Un-align labels
	    #
	    $itk_component(hour) configure -labelmargin 1
	    $itk_component(minute) configure -labelmargin 1
	    $itk_component(second) configure -labelmargin 1
	}
	
	s {
	    $itk_component(hour) configure -labelpos s
	    $itk_component(minute) configure -labelpos s
	    $itk_component(second) configure -labelpos s
	    
	    #
	    # Un-align labels
	    #
	    $itk_component(hour) configure -labelmargin 1
	    $itk_component(minute) configure -labelmargin 1
	    $itk_component(second) configure -labelmargin 1
	}
	
	w {
	    $itk_component(hour) configure -labelpos w
	    $itk_component(minute) configure -labelpos w
	    $itk_component(second) configure -labelpos w
	}
	
	e {
	    $itk_component(hour) configure -labelpos e
	    $itk_component(minute) configure -labelpos e
	    $itk_component(second) configure -labelpos e
	    
	    #
	    # Un-align labels
	    #
	    $itk_component(hour) configure -labelmargin 1
	    $itk_component(minute) configure -labelmargin 1
	    $itk_component(second) configure -labelmargin 1
	}
	
	default {
	    error "bad labelpos option \"$itk_option(-labelpos)\",\
		    should be n, s, w or e"
	}
    }

    _packTime
}

# ------------------------------------------------------------------
# OPTION: -houron
# 
# Specifies whether or not to display the hour spinner.
# ------------------------------------------------------------------
configbody iwidgets::Spintime::houron {
    _packTime
}

# ------------------------------------------------------------------
# OPTION: -minuteon
# 
# Specifies whether or not to display the minute spinner.
# ------------------------------------------------------------------
configbody iwidgets::Spintime::minuteon {
    _packTime
}

# ------------------------------------------------------------------
# OPTION: -secondon
# 
# Specifies whether or not to display the second spinner.
# ------------------------------------------------------------------
configbody iwidgets::Spintime::secondon {
    _packTime
}


# ------------------------------------------------------------------
# OPTION: -timemargin
# 
# Specifies the margin space between the hour and minute spinners 
# and the minute and second spinners. 
# ------------------------------------------------------------------
configbody iwidgets::Spintime::timemargin {
    _packTime
}

# ------------------------------------------------------------------
# OPTION: -militaryon
#
# Specifies 24-hour clock or 12-hour.
# ------------------------------------------------------------------
configbody iwidgets::Spintime::militaryon {
    set clicks [clock seconds]

    if {$itk_option(-militaryon)} {
	$itk_component(hour) configure -range {0 23}
	$itk_component(hour) delete 0 end
	$itk_component(hour) insert end [clock format $clicks -format "%H"]
    } else {
	$itk_component(hour) configure -range {1 12}
	$itk_component(hour) delete 0 end
	$itk_component(hour) insert end [clock format $clicks -format "%I"]
    }
}

# ------------------------------------------------------------------
#                            METHODS
# ------------------------------------------------------------------

# ------------------------------------------------------------------
# METHOD: get ?format?
#
# Get the value of the time spinner in one of two formats string or 
# as an integer clock value using the -string and -clicks options 
# respectively.  The default is by string.  Reference the clock 
# command for more information on obtaining time and its formats.
# ------------------------------------------------------------------
body iwidgets::Spintime::get {{format "-string"}} {
    set hour [$itk_component(hour) get]
    set minute [$itk_component(minute) get]
    set second [$itk_component(second) get]

    switch -- $format {
	"-string" {
	    return "$hour:$minute:$second"
	}
	"-clicks" {
	    return [clock scan "$hour:$minute:$second"]
	}
	default {
	    error "bad format option \"$format\":\
                   should be -string or -clicks"
	}
    }
}

# ------------------------------------------------------------------
# PUBLIC METHOD: show time
#
# Changes the currently displayed time to be that of the time
# argument.  The time may be specified either as a string or an
# integer clock value.  Reference the clock command for more 
# information on obtaining time and its format.
# ------------------------------------------------------------------
body iwidgets::Spintime::show {{time "now"}} {
    if {$time == "now"} {
	set seconds [clock seconds]
    } else {
	if {[catch {clock format $time}] == 0} {
	    set seconds $time
	} elseif {[catch {set seconds [clock scan $time]}] != 0} {
	    error "bad time: \"$time\", must be a valid time\
               string, clock clicks value or the keyword now"
	}
    }

    $itk_component(hour) delete 0 end

    if {$itk_option(-militaryon)} {
	scan [clock format $seconds -format "%H"] "%d" hour
    } else {
	scan hour [clock format $seconds -format "%I"] "%d" hour
    }

    $itk_component(hour) insert end $hour

    $itk_component(minute) delete 0 end
    scan [clock format $seconds -format "%M"] "%d" minute 
    $itk_component(minute) insert end $minute

    $itk_component(second) delete 0 end
    scan [clock format $seconds -format "%S"] "%d" seconds
    $itk_component(second) insert end $seconds

    return
}

# ------------------------------------------------------------------
# PROTECTED METHOD: _packTime ?when?
#
# Pack components of time spinner.  If "when" is "now", the change 
# is applied immediately.  If it is "later" or it is not specified,
# then the change is applied later, when the application is idle.
# ------------------------------------------------------------------
body iwidgets::Spintime::_packTime {{when later}} {
    if {$when == "later"} {
	if {$_repack == ""} {
	    set _repack [after idle [code $this _packTime now]]
	}
	return
    } elseif {$when != "now"} {
	error "bad option \"$when\": should be now or later"
    }

    for {set i 0} {$i < 5} {incr i} {
	grid rowconfigure $_interior $i -minsize 0
	grid columnconfigure $_interior $i -minsize 0
    }

    if {$itk_option(-minuteon)} {
	set minuteon 1
    } else {
	set minuteon 0
    }
    if {$itk_option(-secondon)} {
	set secondon 1
    } else {
	set secondon 0
    }

    set _repack ""

    switch $itk_option(-orient) {
	vertical {
	    set row -1

	    if {$itk_option(-houron)} {
		grid $itk_component(hour) -row [incr row] -column 0 \
		    -sticky nsew 
	    } else {
		grid forget $itk_component(hour)
	    }

	    if {$itk_option(-minuteon)} {
		if {$itk_option(-houron)} {
		    grid rowconfigure $_interior [incr row] \
			-minsize $itk_option(-timemargin)
		}

		grid $itk_component(minute) -row [incr row] -column 0 \
		    -sticky nsew 
	    } else {
		grid forget $itk_component(minute)
	    }
	    
	    if {$itk_option(-secondon)} {
		if {$minuteon || $secondon} {
		    grid rowconfigure $_interior [incr row] \
			-minsize $itk_option(-timemargin)
		}

		grid $itk_component(second) -row [incr row] -column 0 \
		    -sticky nsew 
	    } else {
		grid forget $itk_component(second)
	    }
	    
	    if {$itk_option(-labelpos) == "w"} {
		iwidgets::Labeledwidget::alignlabels $itk_component(hour) \
			$itk_component(minute) $itk_component(second)
	    }
	}
	
	horizontal {
	    set column -1

	    if {$itk_option(-houron)} {
		grid $itk_component(hour) -row 0 -column [incr column] \
		    -sticky nsew 
	    } else {
		grid forget $itk_component(hour)
	    }
	    
	    if {$itk_option(-minuteon)} {
		if {$itk_option(-houron)} {
		    grid columnconfigure $_interior [incr column] \
			-minsize $itk_option(-timemargin)
		}

		grid $itk_component(minute) -row 0 -column [incr column] \
		    -sticky nsew 
	    } else {
		grid forget $itk_component(minute)
	    }
	    
	    if {$itk_option(-secondon)} {
		if {$minuteon || $secondon} {
		    grid columnconfigure $_interior [incr column] \
			-minsize $itk_option(-timemargin)
		}

		grid $itk_component(second) -row 0 -column [incr column] \
		    -sticky nsew 
	    } else {
		grid forget $itk_component(second)
	    }
	    
	    #
	    # Un-align labels
	    #
	    $itk_component(hour) configure -labelmargin 1
	    $itk_component(minute) configure -labelmargin 1
	    $itk_component(second) configure -labelmargin 1
	}
	
	default {
	    error "bad orient option \"$itk_option(-orient)\", should\
		    be \"vertical\" or \"horizontal\""
	}
    } 
}

# ------------------------------------------------------------------
# METHOD: down60
#
# Down arrow button press event.  Decrement value in the minute
# or second entry.
# ------------------------------------------------------------------
body iwidgets::Spintime::_down60 {comp} {
	set step [$itk_component($comp) cget -step]
	set val [$itk_component($comp) get]

	incr val -$step
	if {$val < 0} {
	   set val [expr 60-$step]
        }
	$itk_component($comp) delete 0 end
	$itk_component($comp) insert 0 $val
}
