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# Tix Demostration Program

#

# This sample program is structured in such a way so that it can be

# executed from the Tix demo program "widget": it must have a

# procedure called "RunSample". It should also have the "if" statment

# at the end of this file so that it can be run as a standalone

# program using tixwish.

# This file demonstrates how to use the TixTree widget to display

# dynamic hierachical data (the files in the Unix file system)

#

proc RunSample {w} {

    # We create the frame and the ScrolledHList widget

    # at the top of the dialog box

    #

    frame $w.top -relief raised -bd 1

    # Create a TixTree widget to display the hypothetical DOS disk drive

    # 

    #

    tixTree $w.top.a  -options {

        hlist.separator "/"

        hlist.width 35

        hlist.height 25

    }

    pack $w.top.a -expand yes -fill both -padx 10 -pady 10 -side left

    set tree $w.top.a

    set hlist [$tree subwidget hlist]

    $tree config -opencmd "DynTree:OpenDir $tree"

    # Add the root directory the TixTree widget

    DynTree:AddDir $tree /

    # The / directory is added in the "open" mode. The user can open it

    # and then browse its subdirectories ...

    # Use a ButtonBox to hold the buttons.

    #

    tixButtonBox $w.box -orientation horizontal

    $w.box add ok     -text Ok     -underline 0 -command "destroy $w" \

        -width 6

    $w.box add cancel -text Cancel -underline 0 -command "destroy $w" \

        -width 6

    pack $w.box -side bottom -fill x

    pack $w.top -side top -fill both -expand yes

}

proc DynTree:AddDir {tree dir} {

    set hlist [$tree subwidget hlist]

    if {$dir == "/"} {

        set text /

    } else {

        set text [file tail $dir]

    }

    $hlist add $dir -itemtype imagetext \

        -text $text -image [tix getimage folder]

    catch {

        # We need a catch here because the directory may not be readable by us

        #

        $tree setmode $dir none

        if {[glob -nocomplain $dir/*] != {}} {

            $tree setmode $dir open

        }

    }

}

# This command is called whenever the user presses the (+) indicator or

# double clicks on a directory whose mode is "open". It loads the files

# inside that directory into the Tree widget.

#

# Note we didn't specify the -closecmd option for the Tree widget, so it

# performs the default action when the user presses the (-) indicator or

# double clicks on a directory whose mode is "close": hide all of its child

# entries

#

proc DynTree:OpenDir {tree dir} {

    set PWD [pwd]

    set hlist [$tree subwidget hlist]

    if {[$hlist info children $dir] != {}} {

        # We have already loaded this directory. Let's just

        # show all the child entries

        #

        # Note: since we load the directory only once, it will not be

        #       refreshed if the you add or remove files from this

        #       directory.

        #

        foreach kid [$hlist info children $dir] {

            $hlist show entry $kid

        }

        return

    }

    if [catch {cd $dir}] {

        # We can't read that directory, better not do anything

        cd $PWD

        return

    }

    set files [lsort [glob -nocomplain *]]

    foreach f $files {

        if [file isdirectory $f] {

            if {$dir == "/"} {

                set subdir /$f

            } else {

                set subdir $dir/$f

            }

            DynTree:AddDir $tree $subdir

        } else {

            if {$dir == "/"} {

                set file /$f

            } else {

                set file $dir/$f

            }

            $hlist add $file -itemtype imagetext \

                -text $f -image [tix getimage file]

        }

    }

    cd $PWD

}

# This "if" statement makes it possible to run this script file inside or

# outside of the main demo program "widget".

#

if {![info exists tix_demo_running]} {

    wm withdraw .

    set w .demo

    toplevel $w

    RunSample $w

    bind .demo <Destroy> exit

}