# a generic interactor for tcl and vtk
#
catch {unset vtkInteract.bold}
catch {unset vtkInteract.normal}
catch {unset vtkInteract.tagcount}
set vtkInteractBold "-background #43ce80 -foreground #221133 -relief raised -borderwidth 1"
set vtkInteractNormal "-background #dddddd -foreground #221133 -relief flat"
set vtkInteractTagcount 1
set vtkInteractCommandList ""
set vtkInteractCommandIndex 0

proc vtkInteract {} {
    global vtkInteractCommandList vtkInteractCommandIndex
    global vtkInteractTagcount

    proc dovtk {s w} {
	global vtkInteractBold vtkInteractNormal vtkInteractTagcount 
	global vtkInteractCommandList vtkInteractCommandIndex

	set tag [append tagnum $vtkInteractTagcount]
        set vtkInteractCommandIndex $vtkInteractTagcount
	incr vtkInteractTagcount 1
	.vtkInteract.display.text configure -state normal
	.vtkInteract.display.text insert end $s $tag
	set vtkInteractCommandList [linsert $vtkInteractCommandList end $s]
	eval .vtkInteract.display.text tag configure $tag $vtkInteractNormal
	.vtkInteract.display.text tag bind $tag <Any-Enter> \
	    ".vtkInteract.display.text tag configure $tag $vtkInteractBold"
	.vtkInteract.display.text tag bind $tag <Any-Leave> \
	    ".vtkInteract.display.text tag configure $tag $vtkInteractNormal"
	.vtkInteract.display.text tag bind $tag <1> "dovtk [list $s] .vtkInteract"
	.vtkInteract.display.text insert end \n;
	.vtkInteract.display.text insert end [uplevel 1 $s]
	.vtkInteract.display.text insert end \n\n
	.vtkInteract.display.text configure -state disabled
	.vtkInteract.display.text yview end
    }

    catch {destroy .vtkInteract}
    toplevel .vtkInteract -bg #bbbbbb
    wm title .vtkInteract "vtk Interactor"
    wm iconname .vtkInteract "vtk"
    
    frame .vtkInteract.buttons -bg #bbbbbb
    pack  .vtkInteract.buttons -side bottom -fill both -expand 0 -pady 2m
    button .vtkInteract.buttons.dismiss -text Dismiss \
	-command "wm withdraw .vtkInteract" \
	-bg #bbbbbb -fg #221133 -activebackground #cccccc -activeforeground #221133
    pack .vtkInteract.buttons.dismiss -side left -expand 1 -fill x
    
    frame .vtkInteract.file -bg #bbbbbb
    label .vtkInteract.file.label -text "Command:" -width 10 -anchor w \
	-bg #bbbbbb -fg #221133
    entry .vtkInteract.file.entry -width 40 \
	-bg #dddddd -fg #221133 -highlightthickness 1 -highlightcolor #221133
    bind .vtkInteract.file.entry <Return> {
	dovtk [%W get] .vtkInteract; %W delete 0 end}
    pack .vtkInteract.file.label -side left
    pack .vtkInteract.file.entry -side left -expand 1 -fill x
    
    frame .vtkInteract.display -bg #bbbbbb
    text .vtkInteract.display.text -yscrollcommand ".vtkInteract.display.scroll set" \
	-setgrid true -width 60 -height 8 -wrap word -bg #dddddd -fg #331144 \
	-state disabled
    scrollbar .vtkInteract.display.scroll \
	-command ".vtkInteract.display.text yview" -bg #bbbbbb \
	-troughcolor #bbbbbb -activebackground #cccccc -highlightthickness 0 
    pack .vtkInteract.display.text -side left -expand 1 -fill both
    pack .vtkInteract.display.scroll -side left -expand 0 -fill y

    pack .vtkInteract.display -side bottom -expand 1 -fill both
    pack .vtkInteract.file -pady 3m -padx 2m -side bottom -fill x 

    set vtkInteractCommandIndex 0
    
    bind .vtkInteract <Down> {
      if { $vtkInteractCommandIndex < [expr $vtkInteractTagcount - 1] } {
        incr vtkInteractCommandIndex
        set command_string [lindex $vtkInteractCommandList $vtkInteractCommandIndex]
        .vtkInteract.file.entry delete 0 end
        .vtkInteract.file.entry insert end $command_string
      } elseif { $vtkInteractCommandIndex == [expr $vtkInteractTagcount - 1] } {
        .vtkInteract.file.entry delete 0 end
      }
    }

    bind .vtkInteract <Up> {
      if { $vtkInteractCommandIndex > 0 } { 
        set vtkInteractCommandIndex [expr $vtkInteractCommandIndex - 1]
        set command_string [lindex $vtkInteractCommandList $vtkInteractCommandIndex]
        .vtkInteract.file.entry delete 0 end
        .vtkInteract.file.entry insert end $command_string
      }
    }

    wm withdraw .vtkInteract
}

vtkInteract