vtcl.tcl

#!/bin/sh
# the next line restarts using wish\
exec wish "$0" "$@"

##############################################################################
#
# Visual TCL - A cross-platform application development environment
#
# Copyright (C) 1996-1998 Stewart Allen
#
# 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.

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

## for Tcl/Tk 8.4
if {![llength [info commands tkTextInsert]]} {
    ::tk::unsupported::ExposePrivateCommand tkTextInsert
}

namespace eval ::vTcl {}

set vTcl(sourcing) 0

proc vTcl:log {msg} {
    global vTcl tcl_platform

    if {![info exists vTcl(LOG_FD_W)]} {
	## If we can't open the log files in HOME, try in the vTcl directory.
	if {[catch {open $vTcl(LOG_FILE) "w"} vTcl(LOG_FD_W)] \
	    || [catch {open $vTcl(LOG_FILE) "r"} vTcl(LOG_FD_R)]} {
	    vTcl:error "Cannot open vTcl log file."
	    vTcl:exit
	}	
	catch {fconfigure $vTcl(LOG_FD_R) -buffering line}
    }
	
    puts $vTcl(LOG_FD_W) "$msg"
    flush $vTcl(LOG_FD_W)
    # tkcon_puts $msg
}

proc vTcl:splash_status {string {nodots {}}} {
    global statusMsg
    if {$nodots == {}} { append string ... }
    set statusMsg $string
    update
}

proc vTcl:splash {} {
    global vTcl
    toplevel .x -bd 3 -relief raised
    wm withdraw .x
    set sw [winfo screenwidth .]
    set sh [winfo screenheight .]
    image create photo "title" \
	-file [file join $vTcl(VTCL_HOME) images title.gif]
    wm overrideredirect .x 1
    label .x.l -image title -bd 1 -relief sunken -background black
    pack .x.l -side top -expand 1 -fill both
    entry .x.status -relief flat -background black -foreground white \
    	-textvar statusMsg -font "Helvetica 12"
    pack .x.status -side bottom -expand 1 -fill both
    set x [expr {($sw - 200)/2}]
    set y [expr {($sh - 250)/2}]
    wm geometry .x +$x+$y
    wm deiconify .x
    update idletasks
    after 3000 {catch {destroy .x}}
}

proc vTcl:load_lib {lib} {
    global vTcl

    vTcl:splash_status "Loading library [file tail $lib]"

    set file [file join $vTcl(LIB_DIR) $lib]
    if {[file exists $file] == 0} {
	vTcl:log "Missing Libary: $lib"
	return 0
    } else {
	uplevel #0 [list source $file]
	return 1
    }
}

proc vTcl:load_widgets {} {
    global vTcl

    vTcl:splash_status "Loading widgets"

    #
    # Query for the list of libs to load.
    # Either from prefs or defaults to all available libraries.
    #
    set toload [vTcl::project::getLibrariesToLoad]

    #
    # Make sure lib_core loads before all other widget libraries.
    #
    ::vTcl::lremove toload *lib_core.tcl
    set toload [linsert $toload 0 lib_core.tcl]

    foreach i $toload {
	set lib [lindex [split [file root $i] _] end]
	if {[vTcl:load_lib $i]} {
	    set libname [lindex [split [lindex [file split $i] end] .] 0]
	
	    ## If we don't have the library, don't load the widgets for it.
	    if {![vTcl:$libname:init]} { continue }
	    lappend vTcl(w,libs) $libname
	    vTcl:LoadWidgets [file join $vTcl(VTCL_HOME) lib Widgets $lib]
	}
    }
}

proc vTcl:load_libs {libs} {
    global vTcl
    foreach i $libs {
	vTcl:load_lib $i
    }
}

proc ::vTcl::load_bwidgets {} {
    vTcl:splash_status "Loading BWidgets"

    uplevel #0 {
    	set dir [file join $vTcl(LIB_DIR) bwidget]
	source  [file join $dir pkgIndex.tcl]
    }

}

#
# Get a locally provided 'tablelist' module
#
proc ::vTcl::load_tablelist {} {
    vTcl:splash_status "Loading Tablelist"

    uplevel #0 {
    	set dir [file join $vTcl(LIB_DIR) tablelist]
	source  [file join $dir pkgIndex.tcl]
    }

}



proc vTcl:setup {} {
    global tk_strictMotif env vTcl tcl_platform __vtlog

#    set vTcl(version)   1.60	# Clamped off,2016-02-19/hph

    #+
    # Newstyle versioning:
    #
    #   M.R.m(.p)
    #
    # i.e.: M, R, m & p can be any number of digits
    # but at least 3 positions must be present.
    # M cannot be '0',
    # An optional 4th field 'p' denotes a patchlevel
    # not for production; such a version lives on GitHub
    # i.e. 
    #   - for major vTcl version 9 is written: 9.0.0
    #   - for an upcoming version 8.7 it is 8.7.0
    #     (a.s.o.)
    #	- a version 8.6.3.65 is a patchlevel
    #
    # Attn.: 	This must match with the regex in lib/file.tcl!
    # 		Or vTcl will mourn on load with:
    # 		  "This ist not a vTcl project"
    #-
    set vTcl(version)   8.6.0.5


    if {$env(VTCL_HOME) == ""} {
	set vTcl(VTCL_HOME) [pwd]
    } else {
	set vTcl(VTCL_HOME) $env(VTCL_HOME)
    }

    ## See if we can write to a file in HOME.  If not, use VTCL_HOME
    if {$env(HOME) == "" || [catch {open [file join $env(HOME) .tmp] w} fp]} {
	set vTcl(CONF_FILE) [file join $vTcl(VTCL_HOME) .vtclrc]
	set vTcl(LIB_FILE)  [file join $vTcl(VTCL_HOME) .vtcllibs]
	set vTcl(LOG_FILE)  [file join $vTcl(VTCL_HOME) .vtclog]
    } else {
	set vTcl(CONF_FILE) [file join $env(HOME) .vtclrc]
	set vTcl(LIB_FILE)  [file join $env(HOME) .vtcllibs]
	set vTcl(LOG_FILE)  [file join $env(HOME) .vtclog]
    }
    catch {
    	close $fp
	file delete -force [file join $env(HOME) .tmp]
    }

    set vTcl(LIB_DIR)   [file join $vTcl(VTCL_HOME) lib]
    set vTcl(LIB_WIDG)  [glob -nocomplain [file join $vTcl(LIB_DIR) lib_*.tcl]]
    set LIBS	    "globals.tcl about.tcl propmgr.tcl balloon.tcl
			 attrbar.tcl bgerror.tcl bind.tcl command.tcl color.tcl
			 tkcon.tcl compound.tcl compounds.tcl do.tcl
			 dragsize.tcl dump.tcl edit.tcl file.tcl handle.tcl 
			 input.tcl loadwidg.tcl font.tcl images.tcl menu.tcl
			 misc.tcl name.tcl prefs.tcl proc.tcl tclet.tcl
			 tops.tcl tree.tcl var.tcl vtclib.tcl
			 widget.tcl help.tcl menus.tcl new.tcl ttd/ttd.tcl 
			 toolbar.tcl taborder.tcl copyattr.tcl "

    # UKo 2000-12-10: initiate some variables
    set vTcl(libs)      {}
    set vTcl(classes)   {}
    set vTcl(options)   {}

    set tk_strictMotif    1
    wm withdraw .
    vTcl:splash
    ::vTcl::load_bwidgets
    
    #for scrolled Bands widget
    source [ file join $vTcl(LIB_DIR) kpwidgets sbands.tcl ]
    namespace import kpwidgets::*
    vTcl:load_libs $LIBS
    
    ## load preferences
    if {[file exists $vTcl(CONF_FILE)]} {
	catch {uplevel #0 [list source $vTcl(CONF_FILE)]}
	catch {set vTcl(w,def_mgr) $vTcl(pr,manager)}
    }

    vTcl:load_widgets
#    ::vTcl::load_bwidgets
    ::vTcl::load_tablelist

    # initializes the stock images database
    vTcl:image:init_stock

    # initializes the stock fonts database
    vTcl:font:init_stock

    # initializes the project
    vTcl::project::initModule main

    # make sure TkCon doesn't see command line arguments here
    set argc $::argc
    set argv $::argv
    set ::argc 0
    set ::argv {}
    vTcl:setup_gui
    set ::argc $argc
    set ::argv $argv
    
    update idletasks
    set vTcl(start,procs)   [lsort [info procs]]
    set vTcl(start,globals) [lsort [info globals]]
    vTcl:setup_meta
}

proc vTcl:setup_meta {} {
    global vTcl tcl_platform

    proc exit {args} {}
    proc init {argc argv} {}
    proc main {argc argv} {}

    vTcl:proclist:show $vTcl(pr,show_func)
    vTcl:toplist:show  $vTcl(pr,show_top)
}

proc vTcl:setup_gui {} {
    global vTcl tcl_platform tk_version

    rename exit vTcl:exit

    vTcl:splash_status "Setting Up Workspace"
    
    ##
    ## We use our own version of Bwidgets with some bug fixes. 
    ## Will submit them the bugs when time permits. (C.Cavin/somewhere ~2000)
    ##
    package require -exact BWidget 1.3.1
    package require -exact Tablelist 5.15

    if {$tcl_platform(platform) == "macintosh"} {
	set vTcl(pr,balloon) 0
	set vTcl(balloon,on) 0
    }

    if {$vTcl(pr,font_dlg) == ""} {
	switch $tcl_platform(platform) {
	    windows {
		set vTcl(pr,font_dlg) {{MS Sans Serif} 8}
	    }
	    default {
		set vTcl(pr,font_dlg) {Helvetica 12}
	    }
	}
    }

    if {$vTcl(pr,font_fixed) == ""} {
	set vTcl(pr,font_fixed) {Courier 10}
    }

    if {$tcl_platform(platform) == "unix"} {
	option add *vTcl*Scrollbar.width 10
	option add *vTcl*Scrollbar.highlightThickness 0

	option add *vTcl*Scrollbar.elementBorderWidth 2
	option add *vTcl*Scrollbar.borderWidth 2
	option add *Scrollbar.width 10
	option add *vTcl*font {Helvetica 12}
	option add *ScrolledWindow.size 14
    }

    if {$tcl_platform(platform) == "windows"} {
	option add *Button.padY 0
    }

    option add *vTcl*font $vTcl(pr,font_dlg)
    option add *vTcl*Text*font $vTcl(pr,font_fixed)
    option add *NoteBook.font $vTcl(pr,font_dlg)
    option add *__tk__messagebox*font $vTcl(pr,font_dlg)

    if {[info exists vTcl(pr,bgcolor)] && ![lempty $vTcl(pr,bgcolor)]} {
	## On some systems, the . window has an empty {} background option,
	## and this makes the tk_setPalette code fail
	. configure -background gray
	tk_setPalette $vTcl(pr,bgcolor)
	option add *vTcl*background $vTcl(pr,bgcolor)
    }

    option add *vTcl*Entry.background $vTcl(pr,entrybgcolor)
    option add *vTcl*Listbox.background $vTcl(pr,listboxbgcolor)

    vTcl:setup_bind_tree .
    vTcl:load_images
    Window show .vTcl
    foreach l $vTcl(w,libs) {
	vTcl:widget:lib:$l
    }
    vTcl:toolbar_reflow
    foreach i $vTcl(gui,showlist) {
	Window show $i
    }
    vTcl:clear_wtree

    vTcl:define_bindings
    vTcl:cmp_sys_menu

    raise .vTcl
}

proc vTclWindow.vTcl {args} {
    global vTcl tcl_platform tcl_version

    if {[winfo exists .vTcl]} {return}
    toplevel $vTcl(gui,main)
    wm title $vTcl(gui,main) "Visual Tcl"
    wm resizable $vTcl(gui,main) 0 0
    wm group $vTcl(gui,main) $vTcl(gui,main)
    wm command $vTcl(gui,main) "$vTcl(VTCL_HOME)/vtcl"
    wm iconname $vTcl(gui,main) "Visual Tcl"

    if {$tcl_platform(platform) == "macintosh"} {
	wm geometry $vTcl(gui,main) +0+20
    } else {
	 wm geometry $vTcl(gui,main) +0+0
    }

    catch {
	regsub -all {[0-9]+x[0-9]+} $vTcl(geometry,.vTcl) "" \
	    vTcl(geometry,.vTcl)
	wm geometry .vTcl $vTcl(geometry,.vTcl)
    }

    wm protocol .vTcl WM_DELETE_WINDOW {vTcl:quit}


    set tmp $vTcl(gui,main).menu
    frame $tmp -relief flat
    frame .vTcl.stat -relief flat
    pack $tmp -side top -expand 1 -fill x

    .vTcl conf -menu .vTcl.m

    foreach menu {file edit mode compound options window widget} {
	if {$tcl_version >= 8} {
	    vTcl:menu:insert .vTcl.m.$menu $menu .vTcl.m
	} else {
	    menubutton $tmp.$menu -text [vTcl:upper_first $menu] \
		-menu $tmp.$menu.m -anchor w
	    vTcl:menu:insert $tmp.$menu.m $menu
	    pack $tmp.$menu -side left
	}
    }

    vTcl:menu:insert .vTcl.m.help help .vTcl.m

    # RIGHT CLICK MENU
    set vTcl(gui,rc_menu) .vTcl.menu_rc
    menu $vTcl(gui,rc_menu) -tearoff 0

    set vTcl(gui,rc_widget_menu) .vTcl.menu_rc.widgets
    menu $vTcl(gui,rc_widget_menu) -tearoff 0

    $vTcl(gui,rc_menu) add cascade -label "Widget" \
	-menu $vTcl(gui,rc_widget_menu)

    $vTcl(gui,rc_menu) add command -label "Set Insert" -command {
	vTcl:set_insert
    }
    $vTcl(gui,rc_menu) add command -label "Set Alias..." -command {
	vTcl:set_alias $vTcl(w,widget)
    }

    $vTcl(gui,rc_menu) add separator
    $vTcl(gui,rc_menu) add command -label "Select Toplevel" -command {
	vTcl:select_toplevel
    }
    $vTcl(gui,rc_menu) add command -label "Select Parent" -command {
	vTcl:select_parent
    }
    $vTcl(gui,rc_menu) add separator
    $vTcl(gui,rc_menu) add command -label "Tab order" -command {
	vTcl:taborder
    }
    $vTcl(gui,rc_menu) add command -label "Copy/Paste attributes" -command {
	vTcl:copyattr
    }
    $vTcl(gui,rc_menu) add command -label "Stop Paste attributes" -command {
	vTcl:copyattr:quit
    }
    $vTcl(gui,rc_menu) add separator

    $vTcl(gui,rc_menu) add comm -label "Cut" -comm {
	vTcl:cut
    } -accel "Ctrl+X"
    $vTcl(gui,rc_menu) add comm -label "Copy" -comm {
	vTcl:copy
    } -accel "Ctrl+C"
    $vTcl(gui,rc_menu) add comm -label "Paste" -comm {
	vTcl:paste -mouse
    } -accel "Ctrl+V"
    $vTcl(gui,rc_menu) add comm -label "Delete" -comm {
	vTcl:delete "" $vTcl(w,widget)
    } -accel "Del"

    $vTcl(gui,rc_menu) add separator

    $vTcl(gui,rc_menu) add comm -label "Hide" -comm {
	vTcl:hide
    } -accel "Ctrl+H"
    $vTcl(gui,rc_menu) add command -label "Copy Widgetname" -command {
	vTcl:copy_widgetname
    }
    $vTcl(gui,rc_menu) add separator
    $vTcl(gui,rc_menu) add command -label "Bindings..." -command {
	vTcl:show_bindings
    }

    # MINI-ATTRIBUTE AREA
    vTcl:attrbar
    vTcl:set_manager $vTcl(w,def_mgr)

    # STATUS AREA
    label .vTcl.stat.sl \
	-relief groove -bd 2 -text "Status" -anchor w -width 35 \
	-textvariable vTcl(status)
    label .vTcl.stat.mo \
	-width 6 -relief groove -bd 2 -textvariable vTcl(mode)
    bind .vTcl.stat.mo <Button-1> {
	%W configure -relief sunken
    }
    bind .vTcl.stat.mo <ButtonRelease-1> {
	if {[%W cget -relief] == "sunken"} {
	    vTcl:switch_mode
	}
	%W configure -relief groove
    }
    vTcl:set_balloon .vTcl.stat.mo "application mode"
    frame .vTcl.stat.f -relief sunken -bd 1 -width 150 -height 15
    frame .vTcl.stat.f.bar -relief raised -bd 1 -bg #ff4444
    pack .vTcl.stat.sl -side left -expand 1 -fill both
    pack .vTcl.stat.mo -side left -padx 2
    pack .vTcl.stat.f  -side left -padx 2 -fill y
    pack .vTcl.stat -side top -fill both

    vTcl:setup_vTcl:bind .vTcl

    ## Create a hidden entry widget that holds the name of the current widget.
    ## We use this for copying the widget name and using it globally.
    entry .vTcl.widgetname -textvariable vTcl(w,widget)

    ## Make the menu flat
    .vTcl.m configure -relief flat
}

proc vTcl:vtcl:remap {w} {
    global vTcl

    if {![vTcl:streq $w ".vTcl"]} { return }
    if {![info exists vTcl(tops,unmapped)]} { return }

    foreach i $vTcl(tops,unmapped) {
	if {![winfo exists $i]} { continue }

	vTcl:show_top $i
    }

    wm deiconify .vTcl.toolbar
    set vTcl(tops,unmapped) ""
}

proc vTcl:vtcl:unmap {w} {
    global vTcl

    if {![vTcl:streq $w ".vTcl"]} { return }
    if {[vTcl:streq [wm state $w] "normal"]} { return }

    set vTcl(tops,unmapped) ""

    foreach i $vTcl(tops) {
	if {![winfo exists $i]} { continue }
	if {[wm state $i] != "withdrawn"} {
	    vTcl:hide_top $i
	    lappend vTcl(tops,unmapped) $i
	}
    }
}

proc vTcl:define_bindings {} {
    global vTcl
    vTcl:status "creating bindings"

    foreach i {a b} {
	bind vTcl($i) <Control-z>  { vTcl:pop_action }
	bind vTcl($i) <Control-r>  { vTcl:redo_action }
	bind vTcl($i) <Control-x>  { vTcl:cut %W }
	bind vTcl($i) <Control-c>  { vTcl:copy %W }
	bind vTcl($i) <Control-v>  { vTcl:paste {} %W }
	bind vTcl($i) <Control-q>  { vTcl:quit }
	bind vTcl($i) <Control-n>  { vTcl:new }
	bind vTcl($i) <Control-o>  { vTcl:open }
	bind vTcl($i) <Control-s>  { vTcl:save }
	bind vTcl($i) <Control-w>  { vTcl:close }
	bind vTcl($i) <Control-h>  { vTcl:hide }
	bind vTcl($i) <Key-Delete> { vTcl:delete %W $vTcl(w,widget) }
	bind vTcl($i) <Alt-a>      { vTcl:set_alias $vTcl(w,widget) }
	bind vTcl($i) <Alt-f>      { vTcl:proclist:show flip }
	bind vTcl($i) <Alt-o>      { vTcl:toplist:show flip }
	bind vTcl($i) <Alt-t>      { vTcl:setup_unbind_tree . }
	bind vTcl($i) <Alt-e>      { vTcl:setup_bind_tree . }
	bind vTcl($i) <Alt-b>      { vTcl:show_bindings }
	bind vTcl($i) <Alt-w>      { vTcl:show_wtree }
	bind vTcl($i) <Alt-c>      { vTcl:name_compound $vTcl(w,widget) }
    }

    bind vTcl(c) <Configure>  {
	if {$vTcl(w,widget) == "%W"} {
	    vTcl:update_widget_info %W
	}

	after idle "vTcl:place_handles \"$vTcl(w,widget)\""
    }

    bind Text <Control-Key-c> {tk_textCopy %W}
    bind Text <Control-Key-x> {tk_textCut %W}
    bind Text <Control-Key-v> {tk_textPaste %W}
    bind Text <Key-Tab>       {
	tkTextInsert %W $vTcl(tab)
	focus %W
	break
    }

    #
    # handles auto-indent and syntax coloring
    #
    bind Text <Key-Return>    {

	# exclude user inserted text widgets from vTcl bindings
	if {(! [string match .vTcl* %W]) ||
	    [info exists %W.nosyntax] } {
	    tkTextInsert %W "\n"
	    focus %W
	    break
	}

    	vTcl:syntax_color %W
	set pos [%W index "insert linestart"]
	# change by Nelson 3.9.2003: better auto indent
	set nos [%W search -regexp "\[^#\ \]|$" $pos]
	# set nos [%W search -regexp -nocase "\[a-z0-9\]" $pos]
	if {$nos != ""} {
	    set ct [%W get $pos $nos]
	    tkTextInsert %W "\n${ct}"
	    focus %W
	    break
	} else {
	    tkTextInsert %W "\n"
	    focus %W
	    break
	}
    }
    bind Text <KeyRelease>   {

	# exclude user inserted text widgets from vTcl bindings
	if {(! [string match .vTcl* %W]) ||
	    [info exists %W.nosyntax]  } {
	    break
	}

	if {"%K"=="Up" ||
	    "%K"=="Down" ||
	    "%K"=="Right" ||
	    "%K"=="Left"||
	    "%K"=="space"||
	    "%K"=="End"||
	    "%K"=="Home"||
	    [regexp {[]\")\}]} %A]} {

		scan [%W index insert] %%d pos

		vTcl:syntax_color %W $pos $pos
		focus %W
		break
	}
    }

    bind vTcl(b) <Button-3>	  {vTcl:right_click %W %X %Y %x %y}
    bind vTcl(b) <Double-Button-1>   {vTcl:widget_dblclick %W %X %Y %x %y}
    bind vTcl(b) <Button-1>	  {vTcl:bind_button_1 %W %X %Y %x %y}
    bind vTcl(b) <Button-2>	  {vTcl:bind_button_2 %W %X %Y %x %y}
    bind vTcl(b) <Control-Button-1>  {vTcl:bind_button_2 %W %X %Y %x %y}
    bind vTcl(b) <B1-Motion>	 {vTcl:bind_motion %W %X %Y}
    bind vTcl(b) <B2-Motion>	 {vTcl:bind_motion %W %X %Y}
    bind vTcl(b) <Control-B1-Motion> {vTcl:bind_motion %W %X %Y}
    bind vTcl(b) <ButtonRelease-1>   {vTcl:bind_release %W %X %Y %x %y}
    bind vTcl(b) <ButtonRelease-2>   {vTcl:bind_release %W %X %Y %x %y}

    bind vTcl(b) <Up> {
	vTcl:widget_delta $vTcl(w,widget) 0 -$vTcl(key,y) 0 0
    }

    bind vTcl(b) <Down> {
	vTcl:widget_delta $vTcl(w,widget) 0 $vTcl(key,y) 0 0
    }

    bind vTcl(b) <Left> {
	vTcl:widget_delta $vTcl(w,widget) -$vTcl(key,x) 0 0 0
    }

    bind vTcl(b) <Right> {
	vTcl:widget_delta $vTcl(w,widget) $vTcl(key,x) 0 0 0
    }

    bind vTcl(b) <Shift-Up> {
	vTcl:widget_delta $vTcl(w,widget) 0 0 0 -$vTcl(key,h)
    }

    bind vTcl(b) <Shift-Down> {
	vTcl:widget_delta $vTcl(w,widget) 0 0 0 $vTcl(key,h)
    }

    bind vTcl(b) <Shift-Left> {
	vTcl:widget_delta $vTcl(w,widget) 0 0 -$vTcl(key,w) 0
    }

    bind vTcl(b) <Shift-Right> {
	vTcl:widget_delta $vTcl(w,widget) 0 0 $vTcl(key,w) 0
    }

    bind vTcl(b) <Alt-h> {
	if {$vTcl(h,exist)} {
	    vTcl:destroy_handles
	} else {
	    vTcl:create_handles $vTcl(w,widget)
	}
    }

    #
    # If we iconify or deiconify vTcl, take the top windows with us.
    #
    bind .vTcl <Unmap> { vTcl:vtcl:unmap %W }
    bind .vTcl <Map>   { vTcl:vtcl:remap %W }

    vTcl:status "Status"
}

proc vTcl:main {argc argv} {
    global env vTcl tcl_version tcl_platform

    catch {package require Unsafe} ; #for running in Netscape
    catch {package require dde}    ; #for windows
    catch {package require Tk}     ; #for dynamic loading tk

    if {$tcl_version < 8.3} {
	wm deiconify .
	wm title . "Time to upgrade TCL/TK"
	frame .f -relief groove -bd 2
	pack .f -expand 1 -fill both -padx 2 -pady 2
	label .f.l1 -text "This version of Tk is too old..."
	label .f.l2 -text "Tcl8.3 and Tk8.3 or newer required"
	button .f.b -text "Close" -command {exit}
	pack .f.l1 .f.l2 -side top -padx 5
	pack .f.b -side top -pady 5
	return
    }

    if {$tcl_platform(platform) == "macintosh"} {
	set vTcl(VTCL_HOME) $env(HOME)
    }

   # if {$tcl_platform(platform) == "unix"} {
   # set vTcl(VTCL_HOME) $env(HOME)
   # }

    if {![info exists env(VTCL_HOME)]} {
	set home [file dirname [info script]]
	switch [file pathtype $home] {
	    absolute {set env(VTCL_HOME) $home}
	    relative {set env(VTCL_HOME) [file join [pwd] $home]}
	    volumerelative {
		set curdir [pwd]
		cd $home
		set env(VTCL_HOME) [file join [pwd] [file dirname \
		    [file join [lrange [file split $home] 1 end]]]]
		cd $curdir
	    }
	}
    }
    if {![file isdir $env(VTCL_HOME)]} { set vTcl(VTCL_HOME) [pwd] }
    vTcl:setup

    ## init the bindings editor
    ::widgets_bindings::init

    vTcl:splash_status "	      vTcl Loaded" -nodots
    after 1000 {if {[winfo exists .x]} {destroy .x}}

    ## load file passed in command line, get rid of splash window right here
    if {$argc > 0 && [lindex $argv end] != ""} {
	set file [lindex $argv end]
	if {[file exists $file]} {
	    destroy .x
	    vTcl:open $file
	} elseif {[file exists [file join [pwd] $file]]} {
	    destroy .x
	    vTcl:open [file join [pwd] $file]
	}
    }

    if [info exists vTcl(pr,autoloadcomp)] {
	if {$vTcl(pr,autoloadcomp)} {
	    set loaded [vTcl:load_compounds $vTcl(pr,autoloadcompfile)]
	    if {$loaded == ""} {
		## if user cancels, we unselect the "autoload compounds" option
		## so (s)he is not prompted again
		set vTcl(pr,autoloadcomp) 0
	    } else {
		## user changed the compounds file, save the setting
		set vTcl(pr,autoloadcompfile) $loaded
	    }
	}
    }

    if {[info exists vTcl(pr,dontshowtips)] && !$vTcl(pr,dontshowtips)} {
	Window show .vTcl.tip
    }

    #
    # Show vTcl news.
    #
    if {!$vTcl(pr,dontshownews)} {
	set vTcl(tmp,newsAfter) [after 5000 ::vTcl::news::get_news]
    }
}

vTcl:main $argc $argv