Reference Guide
Reference Guides / JavaScript API / Events / RegisterOnZoomChanged
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    RegisterOnZoomChanged
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     RegisterOnZoomChanged

    This function allows you to trigger a function of your own when the zoom change event is fired.

    RegisterOnZoomChanged: function (docuViewareID, callback)

    Parameters

    docuViewareID
    The identifier for the DocuVieware™ instance.
    callback
    The function you want to execute on event.

    Return Value

    1 if error.

    Example of usage

    This JavaScript makes sure the DocuVieware control is properly loaded and initialized and then subscribes to the event on load.

    function RegisterOnZoomChangedOnDocuViewareAPIReady() {
        if (typeof DocuViewareAPI !== "undefined" && DocuViewareAPI.IsInitialized("DocuVieware1")) {
            DocuViewareAPI.RegisterOnZoomChanged("DocuVieware1", function () { console.log("zoom changed"); });
        }
        else {
            setTimeout(function () { RegisterOnZoomChangedOnDocuViewareAPIReady() }, 10);
        }
    }
    document.addEventListener("DOMContentLoaded", function () {
        RegisterOnZoomChangedOnDocuViewareAPIReady();
    }, false);