topic dojo.connect event object not working in IE7 in ArcGIS JavaScript Maps SDK Questions

dojo.connect event object not working in IE7

BrianGoad — Wed, 18 Apr 2012 13:31:27 GMT

We have an application required to run on IE7 and we've encountered a problem with an event object passed into a function during a dojo.connect "onclick". evt.graphic.symbol.type is coming in as "not defined" in IE7, but works in Firefox. The code:

dojo.connect(this.map,"onClick", function(evt) {

if(evt.graphic.symbol.type == "textsymbol")
{
// do something
}
else
{
// do something else
}
});

Should this work in IE7?

Re: dojo.connect event object not working in IE7

JeffPace — Wed, 18 Apr 2012 13:48:34 GMT

We have an application required to run on IE7 and we've encountered a problem with an event object passed into a function during a dojo.connect "onclick". evt.graphic.symbol.type is coming in as "not defined" in IE7, but works in Firefox. The code:

dojo.connect(this.map,"onClick", function(evt) {

if(evt.graphic.symbol.type == "textsymbol")
{
// do something
}
else
{
// do something else
}
});

Should this work in IE7?

My guess is this is due to the fact that IE uses canvas and everything else uses SVG.

if you alert evt.graphic.symbol i bet you get different results in IE and others. YOu will have to do a dojo.isIE<9 and trap for canvas element or check dojox.gfx.renderer==="vml" and then do your event.

Re: dojo.connect event object not working in IE7

derekswingley1 — Sat, 11 Dec 2021 23:36:28 GMT

My guess is this is due to the fact that IE uses canvas and everything else uses SVG.

if you alert evt.graphic.symbol i bet you get different results in IE and others. YOu will have to do a dojo.isIE<9 and trap for canvas element or check dojox.gfx.renderer==="vml" and then do your event.

IE 7 uses VML, which is different from canvas, wanted to point that out.

You should be checking for properties on objects before accessing them. Try something like:

if( evt.graphic.hasOwnProperty("symbol") &&
    evt.graphic.symbol.hasOwnProperty("type") &&
    evt.graphic.symbol.type == "textsymbol") {
// do something
} else {
// do something else
}

Re: dojo.connect event object not working in IE7

JeffPace — Wed, 18 Apr 2012 14:39:06 GMT

derek is absolutely right, VML for IE7 (and 8 i believe).

Re: dojo.connect event object not working in IE7

BrianGoad — Wed, 18 Apr 2012 18:45:49 GMT

Ah, so IE7 is probably blowing up because it passes a different type of object there (VML vs Canvas). Did not expect it would be different.

Your help is very much appreciated.

Re: dojo.connect event object not working in IE7

derekswingley1 — Wed, 18 Apr 2012 19:50:16 GMT

Ah, so IE7 is probably blowing up because it passes a different type of object there (VML vs Canvas). Did not expect it would be different.

Your help is very much appreciated.

Technically, dojox's gfx should abstracting the differences away for you. Test it out and let us know what you find.