'Viderunt omnes'

Technical Notes

John Gormley

2) Exercises that require objects to be dragged on the screen

There are two different kinds of exercise that involve dragging objects. The first kind involves dragging text into a box (see Example 4) and the second involves dragging a virtual tie into a box (see Example 7).

In the implementation, the boxes know which object they should contain and each object knows which box it should be in. By doing this, it is possible to check whether an object is in the correct box or not.

In the exercises that involve dragging text, objects can either be active or inactive. Only an active object can be moved. When the student checks his or her answer, an object which is in its correct box is deactivated. Similarly, the colour of a box which contains the correct answer changes from red to blue.

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