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There are many ways to select a stack. While the mouse is hovering over stacks, we dynamically update the affordances on the stack to show what stack fragment will be selected if the user decides to click. We also show the size of the stacks, as well as the size of the stack fragment about to be selected, and the size of the dragged component. We try to draw the sizes slightly merged into the stack itself, to make it obvious which stack the number corresponds to. However, this sometimes decreases visibility of this data.
Right clicking on a stack brings up a popup menu originating at the mouse cursor. This menu contains the options flip, shuffle, and spread. These actions can all be performed on any TableSelection. Flipping multiple stacks will also orient them the same way. Shuffling multiple stacks shuffles each one independently, as does spreading multiple stacks. Spreading simply turns a stack of size x into x stacks of unit size, so that each of the unit stacks are visible.
Some implementation issues we have not had time to iron out yet.
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