Overlay

package require media
package require mcllib
_mcl

load media and mcllib package. open mcl.

proc roll {
  {direction right} 
  {org 100} 
  {start -300} 
  {end 680} 
  {cycle 2} 
  {step 4} 
  {period 100}} {

roll text in the $direction, $start, $end, $cycle, $step, $period.

  set i $org 
  if {[string compare $direction right] == 0 \\
      || [string compare $direction down] == 0} {

move text in direction right or down.

    while {$cycle > 0} {
      switch $direction {
        right   {!text {orgx $i}}
        down    {!text {orgy $i}}
      } 
      graph show
      after $period
      set i [expr $i+$step]
      if {$i >= $end} {
        set i $start
        incr cycle -1
      }			
    }

while cycle is greater than 0 write text and show text.

 
  } else {
    while {$cycle > 0} {
      switch $direction {
        left  {!text {orgx $i}}
        up    {!text {orgy $i}}
      } 
      graph show
      after $period
      set i [expr $i-$step]
      if {$i <= $start} {
        set i $end
        incr cycle -1
      }			
    } 
  }
}

similar to above but in the direction of left and up.

set fullname [getPath media image image000.jpg]

_theme {
  title     "Ladybug Studio XP" 
  orgx      250 
  orgy      90
  width     [expr 352]
  height    [expr 240] 
  region    roundrect
  mode      windowless
  close     true}

open theme in windowless. After running the program close the theme automatically.

	
  _text {
    string      "Ladybug Studio XP" 
    orgx        100 
    orgy        20 
    bgcolor     0xffffff 
    fgcolor     0x33ccff
    fill        0xffffffff
    font        Roman
    size        36
    escape      0
    orient      0
    weight      bold
    italic      true
    underline   false
    strikeout   false
    charset     ansi
    pitch	       variable
    family      roman}

open text with string at orgx, orgy position. bgcolor is the background color. fgcolor is the frontground color. fill is the text surface color.

  _image {name "$fullname"}
    _transform {name Wipe progress 0.60}

open image and transform

       set wtheme   [?image width]
       set htheme   [?image height]
       set wtext    [?text width]
       set htext    [?text height]
       set centerx  [expr ($wtheme-$wtext)/2]
       set centery  [expr ($htheme-$htext)/2]

get image size and text size then find the center position of the text on the image.

       _graph {theme {transform text image}}
         !text {orgx [expr $wtheme-$wtext] 
                orgy $centery}
         roll down $centery -$htext $htheme 2 4 6

write text in new center position and rolldown the text

         !text {orgx [expr $wtheme-$wtext] 
                orgy $centery}
         roll up $centery -$htext $htheme 2 4 10
       graph_

write text in new center position and rollup the text.

    transform_
  image_
  text_
theme_
mcl_

close transform, image, text, theme, and mcl