Is it possible to control the map.panUp amount?

StephenLead

The map object has a panUp method, which doesn't accept any arguments.

function north(){
  myMap.panUp();
}

How does it decide how much to pan, and can it be adjusted (without resorting to hacks)? panUp(100) doesn't seem to have any effect.

Thanks,
Steve

JoanneMcGraw

Steve,

I'm not sure if you're still interested in this, but the ESRI JSAPI uses the Map's private method _fixedPan for the arrow keys keyboard navigation which just nudges the map in a given direction, as opposed to the big jump you get with the pan* methods.

To achieve what you seem to be asking (and I imagine this is not advocated by anyone since it's using a private/undocumented function), I simply provide a hard-coded value to indicate the amount of shift (notice it is sometimes negative, btw) in my pan functions. In my case, I just use a 0.0135 all the time. It's generally been close enough, although not exactly the same as the arrow key nudge amounts, for our purposes.

Up: map._fixedPan(0, map.height * -0.0135)
Right: map._fixedPan(map.width * 0.0135, 0)
Down: map._fixedPan(0, map.height * 0.0135)
Left: map._fixedPan(map.width * -0.0135, 0)

If anyone's aware of why this is really not a good idea (besides the fact that the _fixedPan function is undocumented and, consequently, unsupported...a risk I am willing to take but others may not be so inclined, understandably), feel free to share. I haven't noticed any issues, but that doesn't mean there aren't any.

Cheers,
jtm