Context English Romanian
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LibreLogo is a simple, localized, Logo-like programming environment with turtle vector graphics for teaching of computing (programming and word processing), DTP and graphic design. See <link href="http://www.numbertext.org/logo/librelogo.pdf">http://www.numbertext.org/logo/librelogo.pdf</link>.
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The LibreLogo toolbar (<item type="menuitem">View - Toolbars - Logo</item>) contains turtle moving, program start, stop, home, clear screen, program editor/syntax highlighting/translating icons and an input bar (command line).
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They are equivalents of the Logo commands “FORWARD 10”, “BACK 10”, “LEFT 15”, “RIGHT 15”. Clicking on one of the icons will also focus the turtle shape scrolling the page to its position.
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Start Logo program
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Click on the icon “Start Logo program” to execute the text (or only the selected) text of the Writer document as a LibreLogo program. In an empty document an example program will be inserted and executed.
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Click on the icon “Stop” to stop the program execution.
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Click on the icon “Home” to reset the position and settings of the turtle.
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Click on the icon “Clear screen” to remove the drawing objects of the document.
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Program editor/Syntax highlighting/Translating
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The “magic wand” icon sets 2-page layout for program editing, expands and converts to uppercase the abbreviated, lowercase Logo commands in the Writer document. Change the language of the document (<switchinline select="sys"><caseinline select="MAC"><menuitem>%PRODUCTNAME - Preferences</menuitem></caseinline><defaultinline><menuitem>Tools - Options</menuitem></defaultinline></switchinline><menuitem> - Language Settings - Languages - Western</menuitem>) and click on this icon to translate the Logo program to the selected language.
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Hit Enter in the command line to execute its content. To stop the program use the icon “Stop”.
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To reset the command line click triple in it or press Ctrl-A to select the previous commands, and type the new commands.
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Graphical user interface of basic turtle settings
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Turtle shape of LibreLogo is a normal fixed size drawing object. You can positionate and rotate it on standard way, too, using the mouse and the Rotate icon of the Drawing Object Properties toolbar. Modify Line Width, Line Color and Area Color settings of the turtle shape to set PENSIZE, PENCOLOR and FILLCOLOR attributes of LibreLogo.
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LibreLogo drawings and programs use the same Writer document. The LibreLogo canvas is on the first page of the Writer document. You can insert a page break before the LibreLogo programs and set page zoom using the “magic wand” icon of the Logo toolbar, also change the font size for a comfortable 2-page layout for LibreLogo programming: left (first) page is the canvas, right (second) page is the LibreLogo program editor.
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LibreLogo is an easily localizable, Logo-like programming language, localized in several languages by LibreOffice native language communities. It is back-compatible with the older Logo systems in the case of the simple Logo programs used in education, eg.
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TO triangle :size<br/> REPEAT 3 [<br/> FORWARD :size<br/> LEFT 120<br/> ]<br/> END<br/> <br/> triangle 10 triangle 100 triangle 200<br/>
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List members are comma separated: POSITION [0, 0]
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Program blocks and lists are different
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Program blocks need space or new line at parenthesization: REPEAT 10 [ FORWARD 10 LEFT 36 ]