The data of the DrawPanel. Its holds the whole data of one scenario.
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container of all ScenarioElements, separates the real panelModel (Topography) from the PanelModel (that holds information about selection, color, scaling and so on).
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the last copied element, can be null.
a copy of the topography element that will be moved, can be null.
indicate that the prototype is availible != null and visible.
the stack of accessed categories
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Font to be used to display statistical informations.
this is the scalingfactor for the obstacles, targets and sources (if the user want to scale the topography). Not only a view-attribute.
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