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# tclets.tcl --

#

# Drag & Drop Tclets

# by Ray Johnson

#

# A simple way to create Tcl applications.  This applications will copy a droped Tcl file

# into a copy of a stub application (the user can pick).  The file is placed into the

# TEXT resource named "tclshrc" which is automatically executed on startup.

#

# RCS: @(#) $Id: tclets.tcl,v 1.1.1.1 2002-01-16 10:25:55 markom Exp $

#

# Copyright (c) 1997 Sun Microsystems, Inc.

#

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

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

#

# tkOpenDocument --

#

#       This procedure is a called whenever Wish recieves an "Open" event.  The

#       procedure must be named tkOpenDocument for this to work.  Passed in files

#       are assumed to be Tcl files that the user wants to be made into Tclets.

#       (Only the first one is used.)  The procedure then creates a copy of the

#       stub app and places the Tcl file in the new application's resource fork.

#

# Parameters:

#       args            List of files

#

# Results:

#       One success a new Tclet is created.

proc tkOpenDocument {args} {

    global droped_to_start

    # We only deal with the one file droped on the App

    set tclFile [lindex $args 0]

    set stub [GetStub]

    # Give a helper screen to guide user

    toplevel .helper -menu .bar

    unsupported1 style .helper dBoxProc

    message .helper.m -aspect 300 -text \

        "Select the name & location of your target Tcl application."

    pack .helper.m

    wm geometry .helper +20+40

    update idletasks

    # Get the target file from the end user

    set target [tk_getSaveFile]

    destroy .helper

    if {$target == ""} return

    # Copy stub, copy the droped file into the stubs text resource

    file copy $stub $target

    set id [open $tclFile r]

    set rid [resource open $target w]

    resource write -name tclshrc -file $rid TEXT [read $id]

    resource close $rid

    close $id

    # This is a hint to the start-up code - always set to true

    set droped_to_start true

}

# GetStub --

#

#       Get the location of our stub application.  The value may be cached,

#       in the preferences file, or we may need to ask the user.

#

# Parameters:

#       None.

#

# Results:

#       A path to the stub application.

proc GetStub {} {

    global env stub_location

    if {[info exists stub_location]} {

        return $stub_location

    }

    set file $env(PREF_FOLDER)

    append file "D&D Tclet Preferences"

    if {[file exists $file]} {

        uplevel #0 [list source $file]

        if {[info exists stub_location] && [file exists $stub_location]} {

            return $stub_location

        }

    }

    SelectStub

    if {[info exists stub_location]} {

        return $stub_location

    } else {

        exit

    }

}

# SelectStub --

#

#       This procedure uses tk_getOpenFile to allow the user to select

#       the copy of "Wish" that is used as the basis for Tclets.  The

#       result is stored in a preferences file.

#

# Parameters:

#       None.

#

# Results:

#       None.  The prefernce file is updated.

proc SelectStub {} {

    global env stub_location

    # Give a helper screen to guide user

    toplevel .helper -menu .bar

    unsupported1 style .helper dBoxProc

    message .helper.m -aspect 300 -text \

        "Select \"Wish\" stub to clone.  A copy of this application will be made to create your Tclet." \

    pack .helper.m

    wm geometry .helper +20+40

    update idletasks

    set new_location [tk_getOpenFile]

    destroy .helper

    if {$new_location != ""} {

        set stub_location $new_location

        set file [file join $env(PREF_FOLDER) "D&D Tclet Preferences"]

        set id [open $file w]

        puts $id [list set stub_location $stub_location]

        close $id

    }

}

# CreateMenus --

#

#       Create the menubar for this application.

#

# Parameters:

#       None.

#

# Results:

#       None.

proc CreateMenus {} {

    menu .bar

    .bar add cascade -menu .bar.file -label File

    .bar add cascade -menu .bar.apple

    . configure -menu .bar

    menu .bar.apple -tearoff 0

    .bar.apple add command -label "About Drag & Drop Tclets..." -command {ShowAbout}

    menu .bar.file -tearoff 0

    .bar.file add command -label "Show Console..." -command {console show}

    .bar.file add command -label "Select Wish Stub..." -command {SelectStub}

    .bar.file add separator

    .bar.file add command -label "Quit" -accel Command-Q -command exit

}

# ShowAbout --

#

#       Show the about box for Drag & Drop Tclets.

#

# Parameters:

#       None.

#

# Results:

#       None.

proc ShowAbout {} {

    tk_messageBox -icon info -type ok -message \

"Drag & Drop Tclets

by Ray Johnson\n\n\

Copyright (c) 1997 Sun Microsystems, Inc."

}

# Start --

#

#       This procedure provides the main start-up code for the application.

#       It should be run first thing on start up.  It will create the UI

#       and set up the rest of the state of the application.

#

# Parameters:

#       None.

#

# Results:

#       None.

proc Start {} {

    global droped_to_start

    # Hide . & console - see if we ran as a droped item

    wm geometry . 1x1-25000-25000

    console hide

    # Run update - if we get any drop events we know that we were

    # started by a drag & drop - if so, we quit automatically when done

    set droped_to_start false

    update

    if {$droped_to_start == "true"} {

        exit

    }

    # We were not started by a drag & drop - create the UI

    CreateMenus

}

# Now that everything is defined, lets start the app!

Start