Difference between revisions of "Redefine Dialog"

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<noinclude>{{Manual Page|version=4.2}}</noinclude>
 
<noinclude>{{Manual Page|version=4.2}}</noinclude>
 
{{gui|dialog}}
 
{{gui|dialog}}
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Redefining objects is a very versatile way to change a construction. Please note that this may also change the order of the construction steps in the [[File:Menu view construction protocol.svg|link=|16px]] [[Construction Protocol]].
  
Redefining objects is a very versatile way to change a construction. Please note that this may also change the order of the construction steps in the [[Construction Protocol]].
+
{{note|The redefined element can only depend on elements defined earlier in the construction order -- you may need to change order of the elements in [[File:Menu view construction protocol.svg|link=|16px]] [[Construction Protocol]].}}
 
 
{{note|The redefined element can only depend on elements defined earlier in the construction order -- you may need to change order of the elements in [[Construction Protocol]].}}
 
  
 
In GeoGebra, an object may be redefined in different ways:
 
In GeoGebra, an object may be redefined in different ways:
  
* Select [[Image:Tool Move.gif]] [[Move Tool]] and double click on any object in the [[Algebra View]].
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* Select [[File:Mode move.svg|link=|22px]][[Move Tool]] and double click on any object in the [[File:Menu view algebra.svg|link=|16px]] [[Algebra View]].
 
** For free objects an editing field is opened allowing you to directly change the algebraic representation of the object. Hit the Enter-key in order to apply these changes.
 
** For free objects an editing field is opened allowing you to directly change the algebraic representation of the object. Hit the Enter-key in order to apply these changes.
 
** For dependent objects the Redefine dialog is opened allowing you to redefine the object.
 
** For dependent objects the Redefine dialog is opened allowing you to redefine the object.
* Select [[Image:Tool Move.gif]] [[Move Tool]] and double click on any object in the [[Graphics View]]. This opens the Redefine dialog and allows you to redefine the object.
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* Select [[File:Mode move.svg|link=|22px]][[Move Tool]] and double click on any object in the [[File:Menu view graphics.svg|link=|16px]] [[Graphics View]]. This opens the Redefine dialog and allows you to redefine the object.
 
**Change any object by entering its name and the new definition into the Input Bar.
 
**Change any object by entering its name and the new definition into the Input Bar.
 
**Open the Properties Dialog and change the definition of an object on tab Basic.
 
**Open the Properties Dialog and change the definition of an object on tab Basic.
* From GeoGebra 4.2, the Redefine dialog of an object, which was just created, is immediately opened by typing any letter on the keyboard.
 
 
{{note|1=<div>Fixed objects cannot be redefined. In order to redefine a fixed object, you need to free it first using tab Basic of the [[Properties Dialog]].</div>}}
 
{{note|1=<div>Fixed objects cannot be redefined. In order to redefine a fixed object, you need to free it first using tab Basic of the [[Properties Dialog]].</div>}}
  

Revision as of 14:38, 10 August 2015


Redefining objects is a very versatile way to change a construction. Please note that this may also change the order of the construction steps in the Menu view construction protocol.svg Construction Protocol.

Note: The redefined element can only depend on elements defined earlier in the construction order -- you may need to change order of the elements in Menu view construction protocol.svg Construction Protocol.

In GeoGebra, an object may be redefined in different ways:

  • Select Mode move.svgMove Tool and double click on any object in the Menu view algebra.svg Algebra View.
    • For free objects an editing field is opened allowing you to directly change the algebraic representation of the object. Hit the Enter-key in order to apply these changes.
    • For dependent objects the Redefine dialog is opened allowing you to redefine the object.
  • Select Mode move.svgMove Tool and double click on any object in the Menu view graphics.svg Graphics View. This opens the Redefine dialog and allows you to redefine the object.
    • Change any object by entering its name and the new definition into the Input Bar.
    • Open the Properties Dialog and change the definition of an object on tab Basic.
Note:
Fixed objects cannot be redefined. In order to redefine a fixed object, you need to free it first using tab Basic of the Properties Dialog.
Note:
You can also redefine existing objects in the Input Bar. For example type a:Segment[A, B] to redefine a to be a segment.


Examples

Example: In order to place an existing free point A onto an existing line h, you first need to double click on the point A to open the Redefine dialog window. Then change the definition to Point[h] in the appearing text field and press Enter. To remove point A from this line and make it free again, you need to redefine it to some free coordinates, eg (1, 2).
Example: Another example is the conversion of a line h through two points A and B into a segment. Open the Redefine dialog for line h and change Line[A, B] into Segment[A, B]
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