11.10: Forwarding Events

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Methods of the visualization given in the previous section may be moved by a simple drag and drop. However, it may be wished that the methods have a fixed position, and only the classes can be drag-and-dropped. In that case, the message forward has to be sent to the interaction. Consider:

view nodes: ROShape withAllSubclasses forEach: [:cls |
    view interaction forward.
    view shape rectangle
            size: #linesOfCode.
    view nodes: cls methods.
    view edges: cls methods from: #yourself toAll: [ :cm | cls methods select: [ :rcm | cm
        messages anySatisfy: [:s | rcm selector == s ] ] ].
    view treeLayout
].
view interaction action: #browse.
view edgesFrom: #superclass.
view treeLayout.

Moving a method will move the class instead. It is often convenient to drag and drop more than one element. As most operating systems, Mondrian offers multiple selection using the Ctrl or Cmd key. This default behavior is available for every node. Multiple selection allows for a group of nodes to be moved.