For information, here are some of the recent changes I have made in the darcs repository for Blobs. Regards, Malcolm Wed Nov 16 11:06:33 GMT 2005 Malcolm.Wallace@cs.york.ac.uk * allow editing of edge info. It is now possible to edit the info field on an edge, just like the info field on a node. (Through a context menu, or pressing 'i' whilst the edge is selected.) Wed Nov 16 12:06:56 GMT 2005 Malcolm.Wallace@cs.york.ac.uk * make basic app demo slightly more interesting. Now that we can edit the info on an edge, let's make the simple application demo slightly more interesting. The nodes now collect all the numbers on their incoming edges into a list. Then the sum of the numbers in a node is pushed out along its outgoing edges. If you keep hitting the 'perform analysis' step, it will eventually reach a fixed point. Wed Nov 16 15:47:59 GMT 2005 Malcolm.Wallace@cs.york.ac.uk * remove class Analysis, replacing it with datatype Operations. The class Analysis was too restrictive, defining only a single graph-altering operation (and its reversion) per application. Replace it with a datatype storing many possible graph operations. These operations are added to a new title-bar menu. Wed Nov 16 16:16:48 GMT 2005 Malcolm.Wallace@cs.york.ac.uk * left-click on canvas resets current selection. Wed Nov 16 20:23:16 GMT 2005 Malcolm.Wallace@cs.york.ac.uk * Permit multiple selection, which can be dragged as one unit. Rather than being allowed to select only one node, edge, or control point, it is now possible to add multiple items into the selection by holding down the Meta key when clicking an entity. (Meta = Cmd (helicopter) key on MacOS, probably either Alt or Box on Windows.) The Meta-click acts as a toggle, so you can remove items from the selection also. The multiple selection can be dragged to new positions on the canvas, just like a single selection. However, because of this, it only makes sense to allow nodes and control points within a multiple selection. An edge has no location independent of the nodes/controls, so cannot itself be moved. Thu Nov 17 18:31:52 GMT 2005 Malcolm.Wallace@cs.york.ac.uk * Dragging an area on the canvas now makes a multiple selection. Dragging out a rectangle on the background canvas now selects all the nodes and control points within the dragged area. I haven't worked out how to display the rectangle itself. The multiple selection can then be moved by dragging any one of its items. Fri Nov 18 17:10:05 GMT 2005 Malcolm.Wallace@cs.york.ac.uk * Store node palette in the network document rather than in the GUI state. Change the representation of the palette of node shapes very slightly. The palette is now stored as a part of the document (network) itself, rather than in the state of the GUI. This means when you load a new document, you automatically get the palette it was built with. Also, a node can now store either the name of its shape (for lookup in the palette), or its full description, with the shape name being preferred in most circumstances. Fri Nov 18 23:54:43 GMT 2005 Malcolm.Wallace@cs.york.ac.uk * Draw rectangle when dragging canvas area for multiple selection.