# ----------------------------------------------------------------------------
#  mainframe.tcl
#  This file is part of Unifix BWidget Toolkit
#  $Id: mainframe.tcl,v 1.16 2004/02/04 00:11:43 hobbs Exp $
# ------------------------------------------------------------------------------
#  Index of commands:
#     - MainFrame::create
#     - MainFrame::configure
#     - MainFrame::cget
#     - MainFrame::getframe
#     - MainFrame::addtoolbar
#     - MainFrame::gettoolbar
#     - MainFrame::addindicator
#     - MainFrame::getindicator
#     - MainFrame::getmenu
#     - MainFrame::menuonly
#     - MainFrame::showtoolbar
#     - MainFrame::showstatusbar
#     - MainFrame::_create_menubar
#     - MainFrame::_create_entries
#     - MainFrame::_parse_name
#     - MainFrame::_parse_accelerator
# ----------------------------------------------------------------------------

namespace eval MainFrame {
    Widget::define MainFrame mainframe ProgressBar

    Widget::bwinclude MainFrame ProgressBar .status.prg \
	    remove {
	-fg -bg -bd -troughcolor -background -borderwidth
	-relief -orient -width -height
    } \
	    rename {
	-maximum    -progressmax
	-variable   -progressvar
	-type       -progresstype
	-foreground -progressfg
    }

    Widget::declare MainFrame {
	{-width        TkResource 0      0 frame}
	{-height       TkResource 0      0 frame}
	{-background   TkResource ""     0 frame}
	{-textvariable String     ""     0}
	{-menu         String     {}     1}
	{-separator    Enum       both   1 {none top bottom both}}
	{-bg           Synonym    -background}

	{-menubarfont   String     ""  0}
	{-menuentryfont String     ""  0}
	{-statusbarfont String     ""  0}
    }

    Widget::addmap MainFrame "" .frame  {-width {} -height {} -background {}}
    Widget::addmap MainFrame "" .topf   {-background {}}
    Widget::addmap MainFrame "" .botf   {-background {}}
    Widget::addmap MainFrame "" .status {-background {}}
    Widget::addmap MainFrame "" .status.label {-background {}}
    Widget::addmap MainFrame "" .status.indf  {-background {}}
    Widget::addmap MainFrame "" .status.prgf  {-background {}}
    Widget::addmap MainFrame ProgressBar .status.prg {-background {} -background -troughcolor}

    variable _widget
}


# ----------------------------------------------------------------------------
#  Command MainFrame::create
# ----------------------------------------------------------------------------
proc MainFrame::create { path args } {
    global   tcl_platform
    variable _widget

    set path [frame $path -takefocus 0 -highlightthickness 0]
    set top  [winfo parent $path]
    if { ![string equal [winfo toplevel $path] $top] } {
        destroy $path
        return -code error "parent must be a toplevel"
    }
    Widget::init MainFrame $path $args

    if { $tcl_platform(platform) == "unix" } {
        set relief raised
        set bd     1
    } else {
        set relief flat
        set bd     0
    }
    set topframe  [eval [list frame $path.topf] \
		       -relief flat -borderwidth 0 \
		       [Widget::subcget $path .topf]]
    set userframe [eval [list frame $path.frame] \
		       [Widget::subcget $path .frame] \
                       -relief $relief -borderwidth $bd]
    set botframe  [eval [list frame $path.botf] \
		       -relief $relief -borderwidth $bd \
		       [Widget::subcget $path .botf]]

    pack $topframe -fill x
    grid columnconfigure $topframe 0 -weight 1

    set bg [Widget::cget $path -background]
    $path configure -background $bg
    if { $tcl_platform(platform) != "unix" } {
        set sepopt [Widget::getoption $path -separator]
        if { $sepopt == "both" || $sepopt == "top" } {
            set sep [Separator::create $path.sep -orient horizontal -background $bg]
            pack $sep -fill x
        }
        if { $sepopt == "both" || $sepopt == "bottom" } {
            set sep [Separator::create $botframe.sep -orient horizontal -background $bg]
            pack $sep -fill x
        }
    }

    # --- status bar ---------------------------------------------------------
    if {[string length [Widget::getoption $path -statusbarfont]] >0 } {
	set sbfnt [list -font [Widget::getoption $path -statusbarfont]]
    } else {
	set sbfnt ""
    }

    set status   [frame $path.status -relief flat -borderwidth 0 \
                      -takefocus 0 -highlightthickness 0 -background $bg]
    set label    [eval [list label $status.label \
	    -textvariable [Widget::getoption $path -textvariable] \
	    -takefocus 0 -highlightthickness 0 -background $bg] $sbfnt]
    set indframe [frame $status.indf -relief flat -borderwidth 0 \
                      -takefocus 0 -highlightthickness 0 -background $bg]
    set prgframe [frame $status.prgf -relief flat -borderwidth 0 \
                      -takefocus 0 -highlightthickness 0 -background $bg]

    place $label    -anchor w -x 0 -rely 0.5
    place $indframe -anchor ne -relx 1 -y 0 -relheight 1
    pack  $prgframe -in $indframe -side left -padx 2
    $status configure -height [winfo reqheight $label]

    set progress [eval [list ProgressBar::create $status.prg] \
		      [Widget::subcget $path .status.prg] \
                      -width       50 \
                      -height      [expr {[winfo reqheight $label]-2}] \
                      -borderwidth 1 \
                      -relief      sunken]
    pack $status    -in $botframe -fill x -pady 2
    pack $botframe  -side bottom -fill x
    pack $userframe -fill both -expand yes

    set _widget($path,top)      $top
    set _widget($path,ntoolbar) 0
    set _widget($path,nindic)   0

    set menu [Widget::getoption $path -menu]
    if { [llength $menu] } {
        _create_menubar $path $menu
    }

    bind $path <Destroy> [list MainFrame::_destroy %W]

    return [Widget::create MainFrame $path]
}


# ----------------------------------------------------------------------------
#  Command MainFrame::configure
# ----------------------------------------------------------------------------
proc MainFrame::configure { path args } {
    variable _widget

    set res [Widget::configure $path $args]

    if { [Widget::hasChanged $path -textvariable newv] } {
        uplevel \#0 $path.status.label configure -textvariable [list $newv]
    }

    if { [Widget::hasChanged $path -background bg] } {
	if {$::tcl_platform(platform) == "unix"} {
	    set listmenu [$_widget($path,top) cget -menu]
	    while { [llength $listmenu] } {
		set newlist {}
		foreach menu $listmenu {
		    $menu configure -background $bg
		    set newlist [concat $newlist [winfo children $menu]]
		}
		set listmenu $newlist
	    }
	}
        foreach sep {.sep .botf.sep} {
            if { [winfo exists $path.$sep] } {
                Separator::configure $path.$sep -background $bg
            }
        }
        foreach w [winfo children $path.topf] {
            $w configure -background $bg
        }
    }

    if { [Widget::hasChanged $path -menubarfont newmbfnt] } {
	if {[string length $newmbfnt]} {
	    set mbfnt [list -font $newmbfnt]
	} else {
	    set mbfnt ""
	}
	set top     $_widget($path,top)
	if {[string equal $top .]} {
	    eval [list .menubar configure] $mbfnt
	} else {
	    eval [list $top.menubar configure] $mbfnt
	}
    }
    if { [Widget::hasChanged $path -menuentryfont newmefnt] } {
	if {[string length $newmefnt]} {
	    set mefnt [list -font $newmefnt]
	} else {
	    set mefnt ""
	}
	set top     $_widget($path,top)
	if {[string equal $top .]} {
	    set mb .menubar
	} else {
	    set mb $top.menubar
	}
	set l [winfo children $mb]
	while {[llength $l]} {
	    set e [lindex $l 0]
	    set l [lrange $l 1 end]
	    if {[string length $e] == 0} {continue}
	    lappend l [winfo children $e]
	    eval [list $e configure] $mefnt
	}
    }


    if { [Widget::hasChanged $path -statusbarfont newsbfnt] } {
	if {[string length $newsbfnt]} {
	    set sbfnt [list -font $newsbfnt]
	} else {
	    set sbfnt ""
	}
	for {set index 0} {$index<$_widget($path,nindic)} {incr index} {
	    set indic $path.status.indf.f$index
	    eval [list $indic configure] $sbfnt
	}
	eval [list $path.status.label configure] $sbfnt
	$path.status configure -height [winfo reqheight $path.status.label]

	$path.status.prg configure \
		-height [expr {[winfo reqheight $path.status.label]-2}]
    }

    return $res
}


# ----------------------------------------------------------------------------
#  Command MainFrame::cget
# ----------------------------------------------------------------------------
proc MainFrame::cget { path option } {
    return [Widget::cget $path $option]
}


# ----------------------------------------------------------------------------
#  Command MainFrame::getframe
# ----------------------------------------------------------------------------
proc MainFrame::getframe { path } {
    return $path.frame
}


# ----------------------------------------------------------------------------
#  Command MainFrame::addtoolbar
# ----------------------------------------------------------------------------
proc MainFrame::addtoolbar { path } {
    global   tcl_platform
    variable _widget

    set index     $_widget($path,ntoolbar)
    set toolframe $path.topf.f$index
    set toolbar   $path.topf.tb$index
    set bg        [Widget::getoption $path -background]
    if { $tcl_platform(platform) == "unix" } {
        frame $toolframe -relief raised -borderwidth 1 \
            -takefocus 0 -highlightthickness 0 -background $bg
    } else {
        frame $toolframe -relief flat -borderwidth 0 -takefocus 0 \
            -highlightthickness 0 -background $bg
        set sep [Separator::create $toolframe.sep -orient horizontal -background $bg]
        pack $sep -fill x
    }
    set toolbar [frame $toolbar -relief flat -borderwidth 2 \
                     -takefocus 0 -highlightthickness 0 -background $bg]
    pack $toolbar -in $toolframe -anchor w -expand yes -fill x
    incr _widget($path,ntoolbar)
    grid $toolframe -column 0 -row $index -sticky ew
    return $toolbar
}


# ----------------------------------------------------------------------------
#  Command MainFrame::gettoolbar
# ----------------------------------------------------------------------------
proc MainFrame::gettoolbar { path index } {
    return $path.topf.tb$index
}


# ----------------------------------------------------------------------------
#  Command MainFrame::addindicator
# ----------------------------------------------------------------------------
proc MainFrame::addindicator { path args } {
    variable _widget

    if {[string length [Widget::getoption $path -statusbarfont]]} {
	set sbfnt [list -font [Widget::getoption $path -statusbarfont]]
    } else {
	set sbfnt ""
    }

    set index $_widget($path,nindic)
    set indic $path.status.indf.f$index
    eval [list label $indic] $args -relief sunken -borderwidth 1 \
        -takefocus 0 -highlightthickness 0 $sbfnt

    pack $indic -side left -anchor w -padx 2 -fill y -expand 1

    incr _widget($path,nindic)

    return $indic
}


# ----------------------------------------------------------------------------
#  Command MainFrame::getindicator
# ----------------------------------------------------------------------------
proc MainFrame::getindicator { path index } {
    return $path.status.indf.f$index
}


# ----------------------------------------------------------------------------
#  Command MainFrame::getmenu
# ----------------------------------------------------------------------------
proc MainFrame::getmenu { path menuid } {
    variable _widget

    if { [info exists _widget($path,menuid,$menuid)] } {
        return $_widget($path,menuid,$menuid)
    }
    return ""
}


# -----------------------------------------------------------------------------
#  Command MainFrame::setmenustate
# -----------------------------------------------------------------------------
proc MainFrame::setmenustate { path tag state } {
    variable _widget

    #    if { [info exists _widget($path,tags,$tag)] } {
    #        foreach {menu entry} $_widget($path,tags,$tag) {
    #            $menu entryconfigure $entry -state $state
    #        }
    #    }

    # We need a more sophisticated state system.
    # The original model was this:  each menu item has a list of tags;
    # whenever any one of those tags changed state, the menu item did too.
    # This makes it hard to have items that are enabled only when both tagA and
    # tagB are.  The new model therefore only sets the menustate to enabled
    # when ALL of its tags are enabled.

    # First see if this is a real tag
    if { [info exists _widget($path,tagstate,$tag)] } {
	if { ![string equal $state "disabled"] } {
	    set _widget($path,tagstate,$tag) 1
	} else {
	    set _widget($path,tagstate,$tag) 0
	}
	foreach {menu entry} $_widget($path,tags,$tag) {
	    set expression "1"
	    foreach menutag $_widget($path,menutags,[list $menu $entry]) {
		append expression " && $_widget($path,tagstate,$menutag)"
	    }
	    if { [expr $expression] } {
		set state normal
	    } else {
		set state disabled
	    }
	    $menu entryconfigure $entry -state $state
	}
    }
    return
}


# -----------------------------------------------------------------------------
#  Command MainFrame::menuonly
# ----------------------d------------------------------------------------------
proc MainFrame::menuonly { path } {
    variable _widget

    catch {pack forget $path.sep}
    catch {pack forget $path.botf.sep}
    catch {pack forget $path.frame}
}

# ----------------------------------------------------------------------------
#  Command MainFrame::showtoolbar
# ----------------------------------------------------------------------------
proc MainFrame::showtoolbar { path index bool } {
    variable _widget

    set toolframe $path.topf.f$index
    if { [winfo exists $toolframe] } {
        if { !$bool && [llength [grid info $toolframe]] } {
            grid forget $toolframe
            $path.topf configure -height 1
        } elseif { $bool && ![llength [grid info $toolframe]] } {
            grid $toolframe -column 0 -row $index -sticky ew
        }
    }
}


# ----------------------------------------------------------------------------
#  Command MainFrame::showstatusbar
# ----------------------------------------------------------------------------
proc MainFrame::showstatusbar { path name } {
    set status $path.status
    if { [string equal $name "none"] } {
        pack forget $status
    } else {
        pack $status -fill x
        switch -- $name {
            status {
                catch {pack forget $status.prg}
            }
            progression {
                pack $status.prg -in $status.prgf
            }
        }
    }
}


# ----------------------------------------------------------------------------
#  Command MainFrame::_destroy
# ----------------------------------------------------------------------------
proc MainFrame::_destroy { path } {
    variable _widget

    Widget::destroy $path
    catch {destroy [$_widget($path,top) cget -menu]}
    $_widget($path,top) configure -menu {}

    # Unset all of the state vars associated with this main frame.
    foreach index [array names _widget $path,*] {
	unset _widget($index)
    }
}


# ----------------------------------------------------------------------------
#  Command MainFrame::_create_menubar
# ----------------------------------------------------------------------------
proc MainFrame::_create_menubar { path descmenu } {
    variable _widget
    global    tcl_platform

    set top $_widget($path,top)

    foreach {v x} {mbfnt -menubarfont mefnt -menuentryfont} {
	if {[string length [Widget::getoption $path $x]]} {
	    set $v [list -font [Widget::getoption $path $x]]
	} else {
	    set $v ""
	}
    }

    if {$tcl_platform(platform) == "unix"} {
	set menuopts [list -background [Widget::getoption $path -background] \
			  -borderwidth 1]
    } else {
	set menuopts [list]
    }
    set menubar [eval [list menu $top.menubar -tearoff 0] $menuopts $mbfnt]
    $top configure -menu $menubar

    set count 0
    foreach {name tags menuid tearoff entries} $descmenu {
        set opt  [_parse_name $name]
        if {[string length $menuid]
	    && ![info exists _widget($path,menuid,$menuid)] } {
            # menu has identifier
	    # we use it for its pathname, to enable special menu entries
	    # (help, system, ...)
	    set menu $menubar.$menuid
        } else {
	    set menu $menubar.menu$count
	}
        eval [list $menubar add cascade] $opt [list -menu $menu]
        eval [list menu $menu -tearoff $tearoff] $menuopts $mefnt
        foreach tag $tags {
            lappend _widget($path,tags,$tag) $menubar $count
	    # ericm@scriptics:  Add a tagstate tracker
	    if { ![info exists _widget($path,tagstate,$tag)] } {
		set _widget($path,tagstate,$tag) 1
	    }
        }
	# ericm@scriptics:  Add mapping from menu items to tags
	set _widget($path,menutags,[list $menubar $count]) $tags

        if { [string length $menuid] } {
            # menu has identifier
            set _widget($path,menuid,$menuid) $menu
        }
        _create_entries $path $menu $menuopts $entries
        incr count
    }
}


# ----------------------------------------------------------------------------
#  Command MainFrame::_create_entries
# ----------------------------------------------------------------------------
proc MainFrame::_create_entries { path menu menuopts entries } {
    variable _widget

    set count      [$menu cget -tearoff]
    set registered 0
    foreach entry $entries {
        set len  [llength $entry]
        set type [lindex $entry 0]

        if { [string equal $type "separator"] } {
            $menu add separator
            incr count
            continue
        }

        # entry name and tags
        set opt  [_parse_name [lindex $entry 1]]
        set tags [lindex $entry 2]
        foreach tag $tags {
            lappend _widget($path,tags,$tag) $menu $count
	    # ericm@scriptics:  Add a tagstate tracker
	    if { ![info exists _widget($path,tagstate,$tag)] } {
		set _widget($path,tagstate,$tag) 1
	    }
        }
	# ericm@scriptics:  Add mapping from menu items to tags
	set _widget($path,menutags,[list $menu $count]) $tags

        if {[string equal $type "cascade"] || [string equal $type "cascad"]} {
            set menuid  [lindex $entry 3]
            set tearoff [lindex $entry 4]
            set submenu $menu.menu$count
            eval [list $menu add cascade] $opt [list -menu $submenu]
            eval [list menu $submenu -tearoff $tearoff] $menuopts
            if { [string length $menuid] } {
                # menu has identifier
                set _widget($path,menuid,$menuid) $submenu
            }
            _create_entries $path $submenu $menuopts [lindex $entry 5]
            incr count
            continue
        }

        # entry help description
        set desc [lindex $entry 3]
        if { [string length $desc] } {
            if { !$registered } {
                DynamicHelp::register $menu menu [Widget::getoption $path -textvariable]
                set registered 1
            }
            DynamicHelp::register $menu menuentry $count $desc
        }

        # entry accelerator
        set accel [_parse_accelerator [lindex $entry 4]]
        if { [llength $accel] } {
            lappend opt -accelerator [lindex $accel 0]
            bind $_widget($path,top) [lindex $accel 1] [list $menu invoke $count]
        }

        # user options
        set useropt [lrange $entry 5 end]
        if { [string equal $type "command"] ||
             [string equal $type "radiobutton"] ||
             [string equal $type "checkbutton"] } {
            eval [list $menu add $type] $opt $useropt
        } else {
            return -code error "invalid menu type \"$type\""
        }
        incr count
    }
}


# ----------------------------------------------------------------------------
#  Command MainFrame::_parse_name
# ----------------------------------------------------------------------------
proc MainFrame::_parse_name { menuname } {
    set idx [string first "&" $menuname]
    if { $idx == -1 } {
        return [list -label $menuname]
    } else {
        set beg [string range $menuname 0 [expr {$idx-1}]]
        set end [string range $menuname [expr {$idx+1}] end]
        append beg $end
        return [list -label $beg -underline $idx]
    }
}


# MainFrame::_parse_accelerator --
#
#	Given a key combo description, construct an appropriate human readable
#	string (for display on as a menu accelerator) and the corresponding
#	bind event.
#
# Arguments:
#	desc	a list with the following format:
#			?sequence? key
#		sequence may be None, Ctrl, Alt, or CtrlAlt
#		key may be any key
#
# Results:
#	{accel event}	a list containing the accelerator string and the event

proc MainFrame::_parse_accelerator { desc } {
    if { [llength $desc] == 1 } {
	set seq None
	set key [string tolower [lindex $desc 0]]
	# If the key is an F key (ie, F1, F2, etc), it has to be capitalized
	if {[regexp {f1?[0-9]} $key]} {
	    set key [string toupper $key]
	}
    } elseif { [llength $desc] == 2 } {
        set seq [lindex $desc 0]
        set key [string tolower [lindex $desc 1]]
	# If the key is an F key (ie, F1, F2, etc), it has to be capitalized
	if {[regexp {f1?[0-9]} $key]} {
	    set key [string toupper $key]
	}
    } else {
	return {}
    }
    switch -- $seq {
	None {
	    set accel "[string toupper $key]"
	    set event "<Key-$key>"
	}
	Ctrl {
	    set accel "Ctrl+[string toupper $key]"
	    set event "<Control-Key-$key>"
	}
	Alt {
	    set accel "Alt+[string toupper $key]"
	    set event "<Alt-Key-$key>"
	}
	CtrlAlt {
	    set accel "Ctrl+Alt+[string toupper $key]"
	    set event "<Control-Alt-Key-$key>"
	}
	default {
	    return -code error "invalid accelerator code $seq"
	}
    }
    return [list $accel $event]
}
