How can I capture events from within a directive's template using AngularJS?

Within my directive, I have a template that includes an <img> element and I am trying to run a custom method from the directive's scope:

<my-directive>
    <!-- Template for my directive -->
    <p>...</p>
    <img onload="myScopeMethod()">
    <p>...</p>
    <!-- Template for my directive -->
</my-directive>

I came across this solution on Get width height of remote image from url, but it only works if applied to a directive targeting the <img> element.

The main goal of the directive is to display a widget that enables image manipulation (scaling by dragging a slider), therefore I need to retrieve the original size of the image somehow.

Is there a way for me to trigger the method from my controller's scope?

Answer №1

In order to optimize your code, it is recommended to move your load handler function out of the template and into the link function. Depending on your directive setup and scope type (isolate, inherited, or parent), the implementation will vary.

If your directive definition object includes a scope key set as an object literal, you are using an isolate scope. In this case, you will need to pass the data using the '&' option.

For directives without a scope key or with a boolean value set for the scope key, you are likely working with an inherited or same scope. To access methods in these scopes, simply use $scope.originalScopeMethod() to call the appropriate function.

To see examples of these scenarios in action, check out this JSBin. The table at the bottom demonstrates data from the 'main' controller scope, while the small numbers come from the directive scope.

It may be beneficial to use either an isolate or inherited scope to manage multiple images separately. The shared scope version in the example provided is optimized for a single image, but can be adapted for arrays or hashes if needed.

If you have any further questions or if I have misunderstood your inquiry, please let me know.

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