Thank you all, for the warm words :) I was not aware that HTML5 (canvas) already supports editing of graphics -- can you point me to a description and a minimal example, like scribble-window?
Unfortunatly canvas by itself doesn't support editing, so any editing just emulation - changed object erased, than it is draw with changes. Just now Wedana redraw all canvas for changes in editing window. It is not optimal and not very effective, so one of the nearest milestone - renderer optimization (avoiding background redrawing, avoid unnecessary recalculations and much more). On-the fly example of edited canvas may be this: [1]http://processingjs.org/learning/topic/continuouslines It is JS wrapper for Processing lang. You can check other examples to se the power of the Canvas. Is your project related to the suggested file format change to SVG recently proposed by Andrew Seddon? No, just now SVG was not the root technology of this project 'cos weak support of it on mobile browsers. But project architecture allow quickly switch to new format if required. All that is need - write parser of new format to internal JS objects used by Wedana. Do you intend to copy gschem editing behaviour? Yes, it is one of the major feature to be implemented (I need gschem editor on my Android tablet :) ), but with current resources it coud be done at the outumn, not early. Best regards, Pavlo Taranov References 1. http://processingjs.org/learning/topic/continuouslines
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