Comprendre l'environnement graphique

eFORTH utilise l'élément HTML <canvas> pour gérer des formes graphiques. Cet élément est activé en exécutant le mot gr qui est défini dans le vocabulaire web:


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Fatal error: Uncaught Error: Call to a member function sourceForView() on null in /home/arduinofom/eforth/articles/pages/installation/web/graphic/startGraphics.phtml:60 Stack trace: #0 /home/arduinofom/eforth/application/views/scripts/article/index.phtml(7): include() #1 /home/arduinofom/vendors/ZendFramework-1.12.20/library/Zend/View.php(157): include('/home/arduinofo...') #2 /home/arduinofom/vendors/ZendFramework-1.12.20/library/Zend/View/Abstract.php(888): Zend_View->_run('/home/arduinofo...') #3 /home/arduinofom/vendors/ZendFramework-1.12.20/library/Zend/Controller/Action/Helper/ViewRenderer.php(912): Zend_View_Abstract->render(NULL) #4 /home/arduinofom/vendors/ZendFramework-1.12.20/library/Zend/Controller/Action/Helper/ViewRenderer.php(933): Zend_Controller_Action_Helper_ViewRenderer->renderScript('article/index.p...', NULL) #5 /home/arduinofom/vendors/ZendFramework-1.12.20/library/Zend/Controller/Action/Helper/ViewRenderer.php(972): Zend_Controller_Action_Helper_ViewRenderer->render() #6 /home/arduinofom/vendors/Zen in /home/arduinofom/eforth/articles/pages/installation/web/graphic/startGraphics.phtml on line 60