##############################################################################
#
# Visual TCL - A cross-platform application development environment
#
# Copyright (C) 2001 Christian Gavin
#
# Description file for BLT Tabset
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

##############################################################################

Class		      Tabset
Lib		      blt

CreateCmd	      ::blt::tabset
InsertCmd             vTcl::widgets::blt::tabset::insertCmd
Icon		      icon_tabset.gif
DefaultOptions        -relief flat -tearoff 0 -tiers 1
DefaultValues         -background -borderwidth
ClassOption           -_blt_tabset_pages
MegaWidget  yes
TreeChildrenCmd	      {vTcl::widgets::blt::tabset::treeChildrenCmd
		       vTcl::widgets::blt::tabset::treeChildrenChildsite}
DumpCmd               vTcl::widgets::blt::tabset::dumpCmd
DumpInfoCmd           vTcl::widgets::blt::tabset::dumpInfoCmd
GetImagesCmd          vTcl::widgets::blt::tabset::getImagesCmd
GetFontsCmd           vTcl::widgets::blt::tabset::getFontsCmd

## Widget specific options
SpecialOpt -fill "fill" choice {none x y both}
NewOption -perforationcommand "perforation cmd" command
NewOption -gap                "gap"             type
NewOption -pageheight         "page height"     type
NewOption -pagewidth          "page width"      type
NewOption -rotate             "rotate labels"   type
NewOption -samewidth          "same width"      boolean {0 1}
NewOption -scrollincrement    "scroll incr"     type
NewOption -tabrelief          "tab relief"      relief
NewOption -textside           "text side"       choice {left top right bottom}
NewOption -tiers              "tiers"           type

## Tab specific options
NewOption -bindtags		"bind tags"	type
NewOption -data		      "data"		type
NewOption -shadow             "shadow"          color	{}	Colors
NewOption -stipple            "stipple"         type
NewOption -window             "window"          type
NewOption -windowheight       "win height"      type
NewOption -windowwidth        "win width"       type

## Tabbed notebook support
NewOption -_blt_tabset_pages  "pages"  combobox
OptionConfigCmd -_blt_tabset_pages     config     vTcl::widgets::blt::tabset::config_pages
OptionConfigCmd -_blt_tabset_pages     update     vTcl::widgets::blt::tabset::update_pages
OptionConfigCmd -_blt_tabset_pages     get        vTcl::widgets::blt::tabset::get_pages
OptionConfigCmd -_blt_tabset_pages     select     vTcl::widgets::blt::tabset::select_page
OptionConfigCmd -_blt_tabset_pages     edit       vTcl::itemEdit::edit
OptionConfigCmd -_blt_tabset_pages     editArg    vTcl::widgets::blt::tabset::edit

## Right-click menu
Function        "Edit pages..."         ::vTcl::widgets::blt::tabset::editCmd

namespace eval vTcl::widgets::blt::tabset::edit {

    proc getTitle {target} {
        return "Edit pages for $target"
    }

    proc getLabelOption {} {
        return -text
    }

    proc getItems {target} {
        ## first item in the list is the current index
        set size [$target size]
        set current [$target index -index select]
        set values $current
        for {set i 0} {$i < $size} {incr i} {
            lappend values [$target tab cget [$target get $i] -text]
        }
        return $values
    }

    proc addItem {target} {
        set size [$target size]
        set pages ""
        for {set i 0} {$i < $size} {incr i} {
            lappend pages [$target get $i]
        }
        set index 0
        ## repeat until we find an unused page number
        while {1} {
            incr index
            set newpage "page$index"
            if {[lsearch -exact $pages $newpage] == -1} break
        }
	## repeat until we find an unused frame number
	set findex $index
	while {[winfo exists $target.f$findex]} {
	    incr findex
	}
        frame $target.f$findex
        vTcl:widget:register_widget $target.f$findex
        foreach def {-background -highlightbackground -highlightcolor} {
            vTcl:prop:default_opt $target.f$findex $def vTcl(w,opt,$def)
        }
        $target insert end $newpage -text "Page $index" -window $target.f$findex -fill both
        $target select [expr [$target size] - 1]
        vTcl:init_wtree
        return "Page $index"
    }

    proc removeItem {target index} {
        set innerFrame [$target tab cget [$target get $index] -window]
        $target delete $index

        ## if there is a frame, destroy it
	if {$innerFrame != ""} {
	    vTcl:delete "" $innerFrame
	}

	## vTcl:delete will refresh the widget tree
    }

    proc itemConfigure {target index args} {
        set page [$target get $index]
        if {$args == ""} {
            set options [$target tab configure $page]
            set result ""
            foreach option $options {
                ## only return valid options
                if {[llength $option] == 5} {
                    lappend result $option
                }
            }
            return $result
        } else {
            set result [eval $target tab configure $page $args]
	    ## because of a bug in BLT, select only the option we want
	    if {[llength $args] == 1} {
	        set option [lindex $args 0]
		foreach conf $result {
		    if {[lindex $conf 0] == $option} {
		        return $conf
		    }
		}
		## couldn't find it!
		return ""
	    } else {
	        return $result
	    }
        }
    }

    proc moveUpOrDown {target index direction} {
        set offset(up) -1
        set offset(down) 1
        set relative(up) before
        set relative(down) after
        set where $relative($direction)
        set length [$target size]
        set new_index [expr $index + $offset($direction)]
        if {$new_index == -1 && $where == "before"} {
            set where after
            set new_index [expr $length - 1]
        } elseif {$new_index == $length && $where == "after"} {
            set where before
            set new_index 0
        }
        $target move $index $where $new_index
        vTcl:init_wtree
    }
}

namespace eval vTcl::widgets::blt::tabset {

    proc editCmd {} {
        vTcl::itemEdit::edit $::vTcl(w,widget) vTcl::widgets::blt::tabset::edit
    }

    proc insertCmd {target} {
        frame $target.f1
        $target insert end page1 -text "Page 1" -window $target.f1 -fill both
        frame $target.f2
        $target insert end page2 -text "Page 2" -window $target.f2 -fill both
        frame $target.f3
        $target insert end page3 -text "Page 3" -window $target.f3 -fill both

        foreach frame [list $target.f1 $target.f2 $target.f3] {
            vTcl:widget:register_widget $frame
            foreach def {-background -highlightbackground -highlightcolor} {
                vTcl:prop:default_opt $frame $def vTcl(w,opt,$def)
            }
        }
    }

    proc treeChildrenCmd {target {diff \#0}} {
        set children ""
        set wantsdiff [expr {$diff != ""}]

        foreach site [treeChildrenChildsite $target] {
            foreach child [::vTcl:complete_widget_tree $site $wantsdiff] {
                lappend children $child$diff
            }
        }

        return $children
    }

    proc treeChildrenChildsite {target} {
        set size [$target size]
        set result ""
        for {set i 0} {$i < $size} {incr i} {
            lappend result [$target tab cget [$target get $i] -window]
        }
        return $result
    }

    proc dumpCmd {target basename} {
        set result [vTcl:dump_widget_opt $target $basename]
        set pages [treeChildrenChildsite $target]
        set size [$target size]
        for {set i 0} {$i < $size} {incr i} {
            ## dump the frame containing the page (we have to handle that ourselves)
            set page [lindex $pages $i]
            set last [lindex [split $page .] end]
            append result [vTcl:dump_widget_opt $page $basename.$last]

            ## now add the tab
            set conf [$target tab configure [$target get $i]]
            set ::basenames($page) $basename.$last
            set pairs [vTcl:get_subopts_special $conf $target]
            append result "$::vTcl(tab)$basename insert end page[expr $i + 1] \\\n"
            append result "[vTcl:clean_pairs $pairs]\n"
            catch {unset ::basenames($page)}
        }
        for {set i 0} {$i < $size} {incr i} {
            set site [lindex $pages $i]
            append result "$::vTcl(tab)"
            set sitevariable "site_[llength [split $site .]]_$i"
            append result "set $sitevariable "
            append result "\[$basename tab cget \[$basename get $i\] -window\]\n"
            append result \
                [vTcl::widgets::blt::dump_subwidgets $site \$$sitevariable]
        }
        return $result
    }

    proc dumpInfoCmd {target basename} {
        global classes
        set result [vTcl:dump:widget_info $target $basename]
        set pages [treeChildrenChildsite $target]
        set size [$target size]
        for {set i 0} {$i < $size} {incr i} {
            set page [lindex $pages $i]
            set last [lindex [split $page .] end]
            append result [$classes(Frame,dumpInfoCmd) $page $basename.$last]
        }
        return $result
    }

    proc update_pages {target var} {
        ## there is a trace on var to update the combobox
        ## first item in the list is the current index
        set size [$target size]
        set current [$target index -index select]
        set values $current
        for {set i 0} {$i < $size} {incr i} {
            set label_opt [$target tab cget [$target get $i] -text]
            lappend values $label_opt
        }

        ## this will trigger the trace
        set ::$var $values
   }

    proc config_pages {target var} {
    }

    proc get_pages {target} {
    }

    proc select_page {target index} {
        $target select $index
    }

    proc getImagesCmd {target} {
        set result {}
        set size [$target size]
        for {set i 0} {$i < $size} {incr i} {
            set image [$target tab cget [$target get $i] -image]
            if {$image != ""} {
                lappend result $image
            }
       }
       return $result
   }

    proc getFontsCmd {target} {
        set result {}
        set size [$target size]
        for {set i 0} {$i < $size} {incr i} {
            set font [$target tab cget [$target get $i] -font]
            if {$font != ""} {
                lappend result $font
            }
       }
       return $result
    }
}