Sorry, my request for some documentation wasn't at all clear. What I should have said is more like ...
I am happy to ask questions, but I'd prefer to know how to diagnose stuff like this for myself. So, is their a tool, or a clear, preferably diagrammatic, document or representation explaining the event structure and how events flow so that I could have diagnosed this for myself? It seems to me that there could be a few SVG-based diagrams which show how events flow, and the types of action that events might trigger. That might have been a good place for me to start trying to figure out what was happening. It could even be animated :-) It could even be a tool, or web site, which takes my SVG, translates it and annotates it so that I have a visual debug of the SVG document structure; like a visual debugger, but for the event flow, rather than the program flow, or static document structure. Quite a lot to ask for, but my experience is, no matter how ambitious, it either already exists, or it will exist within six months of asking for it (GB's Internet Law 0). Jake - Thanks again for your help. GB --- In [email protected], Jacob Beard <jbeard4@...> wrote: > > Sure. > > Here's some documentation on evt.preventDefault: > https://developer.mozilla.org/en/DOM/event.preventDefault > > Here's a bug report related to the SVG drag issue in Firefox: > https://bugzilla.mozilla.org/show_bug.cgi?id=525591 > > That's about all I know of it. > > Cheers, > > Jake > > On 11-01-17 07:34 PM, gb_n_svg wrote: > > > > Jake - Thank you! > > > > I have checked in Chrome, and adding "evt.preventDefault();" into the > > onmousedown event handler stops the flickering text highlight. > > > > I have checked in Firefox 4b9, and adding "evt.preventDefault();" into > > the onmousedown event handler stops the wierd text drag thing. > > > > Excellent, and thank you. > > > > Would you recommend something I should look at to get a better > > understanding of what is going on? > > > > GB > > > > --- In [email protected] > > <mailto:svg-developers%40yahoogroups.com>, "gb_n_svg" <gbulmeruk@> > > wrote: > > > > > > Jake - Thanks for the advice. > > > > > > Is the "evt.preventDefault();" called on *EVERY* mouse event, or > > only once, initially in an "onload", or something? > > > > > > GB > > > > > > --- In [email protected] > > <mailto:svg-developers%40yahoogroups.com>, Jacob Beard <jbeard4@> wrote: > > > > > > > > > > > > > > > > On 11-01-17 05:21 PM, GB wrote: > > > > > > > > > > Firefox often (but not always) creates a text 'drag rectangle' and > > > > > when mouse-up, the rectangle disappears, and the dragged 'use' > > > > > elements 'jump' to the cursor. So the whole set of events are > > > > > propagated, but after the button is released, and the mouse-up is > > > > > lost, which is very awkward. > > > > > > > > > You can disable this behaviour in Firefox by calling > > > > evt.preventDefault(); in the event handler. This might also > > disable and > > > > normalize the other browser behaviours you mentioned, but I'm not > > sure. > > > > If you have success with this, please be sure to post your > > experiences here. > > > > > > > > Jake > > > > > > > > > > > > [Non-text portions of this message have been removed] > > > > > > > > > > > > > > [Non-text portions of this message have been removed] > ------------------------------------ ----- To unsubscribe send a message to: [email protected] -or- visit http://groups.yahoo.com/group/svg-developers and click "edit my membership" ----Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/svg-developers/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/svg-developers/join (Yahoo! ID required) <*> To change settings via email: [email protected] [email protected] <*> To unsubscribe from this group, send an email to: [email protected] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
