As mentioned in the first post, last LibreOffice UX hackfest has resulted also a small LibreLogo fix for program translation. Recent update of LibreLogo has got greater improvements in the user interface:

• Program editor: “Magic wand” icon sets also page zoom and a page break, resulting the suggested 2-page layout for Logo program editing.

• Start fix + brief demonstration: Start icon inserts and starts a programming example in an empty document. This fixes the confusing UI problem of LibreLogo: when the user tries to run the content of the input field of the Logo toolbar with the Start icon (instead of the Enter), there is no any visual feedback in an empty document. The small, localized and modifiable example introduces some basic features of LibreLogo (PENUP/PENDOWN, LABEL, REPEAT/REPCOUNT, color settings, PICTURE), helping to start programming.

• Now the “Magic wand” icon precedes the long input field on the Logo toolbar: vertical docking of the toolbar doesn’t remove this icon, also the undocked toolbar doesn’t break the icons into three rows unnecessarily. This modification was suggested by Gilvan Vilarim, Brazilian Portuguese translator of LibreLogo.

• Fixed document handling: “Saving as” doesn’t create a new turtle in the document, and the Logo toolbar uses the current document instead of the old ones (for example, renamed “Untitled 1”).

• Fixed text selection: program running keeps the selection of the turtle, if it was selected at the start of the program, instead of selecting the text of the document wrongly.

• Not a user interface, but a spectacular user experience improvement is the new random color generator, checked with the following program on the attached screenshots:

  PENUP
  FOR i IN RANGE 12 [
      REPEAT 17 [
          POSITION [23+50*i, 50*REPCOUNT-30]
          FILLCOLOR ANY
          HEADING 0
          SQUARE 50
      ]
  ]
  

• PENCAP (or LINECAP) command. Its text arguments are the default “NONE”, furthermore “ROUND” and “SQUARE”. Source code of the attached picture:
  

  TO twolines
      PENDOWN PENSIZE 20 PENCOLOR “TOMATO”
      FORWARD 200 
      PENSIZE 2 PENCOLOR “BLACK”
      BACK 200
      PENUP RIGHT 90 FORWARD 40 LEFT 90
  END
  HIDETURTLE
  PENCAP “NONE”
  twolines
  PENCAP “ROUND”
  twolines
  PENCAP “SQUARE”
  twolines
  

  Unconnected thick lines could seem to be continuous with the new linecap settings, as in this SVG animation (random walk).

• FORWARD “text” command: the turtle prints the text and moves to the end of the text, so it’s possible to continue the text with a similar command. The code of the attached picture:
  

  PENUP
  FONTCOLOR “GREEN”
  FORWARD “LIBRE”
  FONTCOLOR “GRAY”
  FORWARD “LOGO”
  

• Stable batch generation of cropped SVG images. Examples: Images with LibreLogo source code. The next program generates ten regular polygons from the equilateral triangle to the regular 12-gon:
  

  TO polygon n
      FILLCOLOR ANY
      REPEAT n [ FORWARD 20 RIGHT 360/n ]
      FILL
  END
  REPEAT 10 [
      PICTURE “polygon%s.svg” % REPCOUNT [
          polygon REPCOUNT + 2
      ]
  ]
  

• Optional looping of SVG animations (it needs only a SLEEP command after the last shape). Source code of the attached random walk illustration:
  

  PENCAP “ROUND” PENSIZE 5 HIDETURTLE
  PICTURE “random_walk.svg” [
      REPEAT 50 [
          SLEEP 50
          HEADING 90 * INT RANDOM 4
          FORWARD 20
      ]
      SLEEP 50
  ]
  

• Relative SVG image path of PICTURE is relative to the path of the document (or in the case of a new document without any saving the default path is the root of the user folder).