Difference between revisions of "Activities/Ruler"
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(Created page with '300px == Where to get Ruler == [http://activities.sugarlabs.org/en-US/sugar/addon/4192/ Activity] | [http://git.sugarlabs.org/projects/ruler/repos/mainlin...') |
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Revision as of 08:52, 22 July 2010
Where to get Ruler
About Ruler
Ruler is a simple collection of measurement tools that are displayed on the screen.
<gallery> File:Ruler-fig1.png|CM and MM scales File:Ruler-fig2.png|CM and MM grid File:Ruler-fig3.png|angles File:Ruler-fig4.png|checkerboard <gallery>
Since the OLPC XO computer has a 200 DPI display, the rulers are quite accurate. One other hardware, where the display resolution is not known, their is a spinner to let the user set the DPI. Ruler saves this value to the Journal, so it need not be set on subsequent uses of the Activity.