[ graph ] Tangent toggle functionnality #24
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The students can now switch between the tangents directly from the tangent's view using the up and down keys.
(see issue UpsilonNumworks#156)
Problème ressenti :
Il est fréquemment demandé aux élèves de comparer les tangentes de 2 courbes en un même point. Or il est fastidieux actuellement de comparer les tangentes de 2 courbes : le menu permettant d'afficher les tangentes est enfoui dans "calculer".
Pour passer aux tangentes de la 2e courbe, il faut appuyer sur le bouton "retour", ce qui désactive l'affichage des tangentes, puis changer de courbe avec les flèches haut ou bas, et aller à nouveau activer dans les menus l'affichage de la tangente pour la 2e courbe... Pas facile de basculer plusieurs fois d'une courbe à l'autre...
Evolution proposée:
Déplacer le menu d'affichage de la tangente au même niveau que le choix d'affichage du nombre dérivé, avec le même système d'activation que ce dernier.
Un simple appui sur les flèches haut ou bas permet alors de changer la courbe pour laquelle la tangente est affichée.