Difference between revisions of "Accessibility"

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(new version for applets / GeoGebraTube)
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<noinclude>{{Manual Page|version=5.0}}</noinclude>
  
{{note|The following only applies to the GeoGebra Desktop Version.}}
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When designing applets it is important to allow (as much as possible) for all students to access them.
  
==Mouse control==
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==Fontsize, Color & Contrast==
The GeoGebra Desktop Version has an embedded [[Virtual Keyboard|virtual keyboard]] that allows the user to interact with the software using the mouse. Select ''View'' → [[File:Menu_view_keyboard.svg|link=|16px]] ''Keyboard'' to open the virtual keyboard and start using it with the mouse.
 
{{Note|1=Besides the standard layout, the virtual keyboard also contains a selection of mathematical symbols. Further characters are available by pressing the {{KeyCode|AltG}} button.The virtual keyboard can also be resized, by dragging its edges.}}
 
  
==Keyboard control==
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Using large fonts with a good contrast is important. Select a large font-size in Options -> Fontsize before you start designing your applet. You can also use the keyboard shortcut {{KeyCode|Ctrl+2}} to make all fonts bigger and all lines thicker. {{KeyCode|Ctrl+3}} will change the default for all new objects to be Black and unfilled.
To open menus using keyboard only, press {{KeyCode|Alt}} once and than the arrow keys (on Windows). On Mac you have to enable ''full keyboard access'' first. Press {{KeyCode|Ctrl+F1}} to activate it. Now you are able to select menus by using {{KeyCode|Ctrl+F2}} or on some keyboards {{KeyCode|Fn+Ctrl+F2}}.  
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For more keyboard options see the [[Keyboard Shortcuts]] section. Moreover, all features of the [[Properties Dialog]] are accessible via [[Scripting Commands]].
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Ideally use dark colors on a white background and thick lines. Pure [http://snook.ca/technical/colour_contrast/colour.html#fg=FF0000,bg=FFFFFF Red] and [http://snook.ca/technical/colour_contrast/colour.html#fg=00FF00,bg=FFFFFF Green] don't have a very good contrast so you should use some darker versions, eg [http://snook.ca/technical/colour_contrast/colour.html#fg=0000FF,bg=FFFFFF Blue], [http://snook.ca/technical/colour_contrast/colour.html#fg=226600,bg=FFFFFF Dark Green], [http://snook.ca/technical/colour_contrast/colour.html#fg=990033,bg=FFFFFF Dark Red]
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If you use colors to distinguish otherwise-similar objects, then consider also using dashed lines for one of them. You can also find websites where you can check whether your color scheme is good, for example http://www.vischeck.com/
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==Keyboard Shortcuts==
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Students can use {{KeyCode|Tab}} to cycle round the objects in a worksheet you have designed. It is important that you uncheck "Selection Allowed" in Object Properties -> Advanced for the objects you don't want to be selected. There is a keyboard shortcut {{KeyCode|Ctrl+Shift+D}} in the desktop version that will toggle this property for objects '''other than''' Buttons / Sliders / Checkboxes / Points / Input Boxes.
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The arrow keys {{KeyCode|Left}}, {{KeyCode|Right}}, {{KeyCode|Up}}, {{KeyCode|Down}} can be used to move Sliders and Points once they are selected.
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{{KeyCode|Space}} can be used to activate a Button or toggle a Checkbox.
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GeoGebra Applets are also fully touch-enabled so students can use applets on a special large tablet if necessary.

Revision as of 12:43, 18 September 2015


When designing applets it is important to allow (as much as possible) for all students to access them.

Fontsize, Color & Contrast

Using large fonts with a good contrast is important. Select a large font-size in Options -> Fontsize before you start designing your applet. You can also use the keyboard shortcut Ctrl + 2 to make all fonts bigger and all lines thicker. Ctrl + 3 will change the default for all new objects to be Black and unfilled.

Ideally use dark colors on a white background and thick lines. Pure Red and Green don't have a very good contrast so you should use some darker versions, eg Blue, Dark Green, Dark Red

If you use colors to distinguish otherwise-similar objects, then consider also using dashed lines for one of them. You can also find websites where you can check whether your color scheme is good, for example http://www.vischeck.com/

Keyboard Shortcuts

Students can use Tab to cycle round the objects in a worksheet you have designed. It is important that you uncheck "Selection Allowed" in Object Properties -> Advanced for the objects you don't want to be selected. There is a keyboard shortcut Ctrl + Shift + D in the desktop version that will toggle this property for objects other than Buttons / Sliders / Checkboxes / Points / Input Boxes.

The arrow keys Left, Right, Up, Down can be used to move Sliders and Points once they are selected.

Space can be used to activate a Button or toggle a Checkbox.

GeoGebra Applets are also fully touch-enabled so students can use applets on a special large tablet if necessary.

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