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I am trying to zoom into a location on a single click. How can I zoom towards the point on single click? I have tried using OpenLayers.Control.ZoomIn and adding a click handler, but for some reason its not registering the "click".

Here is a rundown of my code:

map = ...; // map initialization 
... // added layers

// list of tools for map/feature manipulation
tools = 
  // ... tools
  // Tool In question :
  zoomIn : new OpenLayers.Control.ZoomIn({
                // zoom_in needs a click handler, otherwise, its just button on the map
                handler : new OpenLayers.Handler.Click(
                    this, // control
                    {'click' : this.trigger}, // callbacks
                    {'single' : true, 'double' : false, 'pixelTolerance' : 0} // options
                // overriding ZoomIn.trigger so I can call console.log and alert
                trigger : function(e) {
                    alert("Zoom in, please!");
          }) // end zoomIn
} // end tools

for(key in tools) {

// I only made zoomIn active for testing...

So, the alert doesn't happen and neither does the console.log(e)... How come the callback function is not getting called when I click?


P.S. Sorry if its something silly, I'm brand new to js...

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2 Answers 2

up vote 5 down vote accepted

You shouldn't need to use the ZoomIn control. Have a look at the http://openlayers.org/dev/examples/click-handler.html examples to see how to implement a custom handler.

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To complete geographika's answer, this example could also help you handling click event : http://openlayers.org/dev/examples/click.html

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+1 That example is simpler –  geographika Jul 27 '11 at 12:49

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