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Integrating image tagging

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Front Page Forums Problems Integrating image tagging

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    Mike Bergenstjerna
    January 29, 2015 at 7:13 pm

    Hi,
    I’m trying to integrate a simple image region tagging system so
    that Galleria displays previously created tags on the main display
    image, by rendering out a JSON array of tags to the data layer HTML
    for each image. Since I can’t be sure in advance what size Galleria
    will display the image, the tags are stored with position and size
    expressed as a proportion of the image size when the tags are
    created, such that the X, Y, width and height of the tags are
    always a value between 0 and 1.

    I’ve hooked in to the loadstart event (apparently the only time
    I can modify the HTML data layer) but can’t find a way to get the
    displayed width/height of the image being loaded.

    Is there any way I can get or calculate the display size of the
    image within the function I’ve hooked to the loadstart event?


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