X Library Question (Mike Foster's X Lib)

[ericj]

Suppose I enable drag for an item like this:

xEnableDrag('thing',startDrag,doDrag,endDrag);

In my startDrag function, how do I get the current event without
using window.event? That is, in the following:

function startDrag() {
// how do I tell if the shiftKey was pressed when this function
// was called?
}

- eric juvet

[MikeFoster]

Hi Eric, Welcome to SPF!

and thanks for your interest in X

There have been a few times where I've noticed the need for this too - but currently there is no way to get the event. So I'll make a change so that the event object is also passed to the callback functions. The question is... do I pass the xEvent object, or the native event object? My idea for now is to pass the xEvent object.

I'll try to get this done soon, but tbh my to-do list for X is quite long . You can go ahead and make the change in your copy, and I'll try to get the change into the next X release. In the following snippets (from xEnableDrag) I've added 'ev' as the last argument in the calls to the callback functions, that is the only change you'll have to make:

function _xOMD(e) // drag start
{
...
    if (t.xODS) { t.xODS(t, ev.pageX, ev.pageY, ev); } // added ev as last argument
  }
}
function _xOMM(e) // drag
{
...
    if (el.xOD) { el.xOD(el, dx, dy, b, ev); } // added ev as last argument
    else if (b) { xMoveTo(el, xLeft(el) + dx, xTop(el) + dy); }
  }
}
function _xOMU(e) // drag end
{
...
      _xDrgMgr.ele.xODE(_xDrgMgr.ele, ev.pageX, ev.pageY, ev); // added ev as last argument
    }
    _xDrgMgr.ele = null;
  }
}

Thanks!