hi, I just wanted to show some progress, I made with the kde4 port. I implemented basic functionality of drawing connectors (graphical representation of a wire), tonight. The nights before, I refactored the work I did on drawing components. It's now based on QGraphicsView system. I noticed some conflicts between the old QCanvas implementation and the new one, regarding coordinate systems and reference points. Therefore I'd like to slightly change the circuit-file format, to make it fit better to the needs of the new graphics- system. I'm not sure, how exactly I want to change it, but I don't like it, as it is done, at the moment. One example I don't like is the use of different reference points and scales. A route in a connector is stored relatively to an 8x8 grid, item's coordinates are stored in absolute pixel-values. I still don't want to break old files, so I want to provide some legacy code, to load old style circuit files and save them as the new version. But as I said, I need to clarify some things, before proceeding (i.e. implement write support).
I got some screen-shots: First one is very old.. it shows my first tests with plasma.. but there is the KDE3 version of ktechlab, showing a circuit file, I use for testing: http://nbprogs.dyndns.info/~jb/screen/ktechlab-circuit.png Then, the same file loaded with the version from "circuit_rewrite" branch: http://nbprogs.dyndns.info/~jb/screen/ktechlab-circuit1.png Note, the connectors are exactly the same, the components still have got some scaling and minor positioning issues (due to problems, I explained earlier in this mail). And the same, but with Theme::defaultTheme() set to "us" instead of "din": http://nbprogs.dyndns.info/~jb/screen/ktechlab-circuit2.png Again, there's some issues with the scale of the components, but this can be corrected by fixing the svg-files. Anyway, when this is ready. The whole graphical part of ktechlab will be much easier. A lot of messy code can be dropped (today I read through some of the painting-classes..... it was painful) Well.. that's all, for now. I'll keep you posted.. bye then julian PS: I hope, my explanations are understandable. I'm not used to express all that graphics/mathematics-related stuff in English. I will setup some pages in the wiki explaining the use of QGraphicsView in our context.
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