Code (Javascript)

diagram.addEventListener("nodeClicked", (sender, args) =>
{
    let content = args.getNode().getGraphicsContent();
    let image: MindFusion.Drawing.Image = null;
    for (let i = 0; i < content.length; i++)
    {
        if (MindFusion.AbstractionLayer.isInstanceOfType(MindFusion.Drawing.Image, content[i]))
        {
             image = content[i];
             break;
	}
        if (image != null)
        {
             let pointInsideBounds = contains(image.bounds, args.getMousePosition());
             if (pointInsideBounds)
             {
                   // the image was clicked.
             }
    }
});

function contains(rect: MindFusion.Drawing.Rect, point: MindFusion.Drawing.Point)
{
    return rect.x <= point.x && point.x <= rect.x + rect.width &&
        rect.y <= point.y && point.y <= rect.y + rect.height;
} 

Code (Javascript)

if (MindFusion.AbstractionLayer.isInstanceOfType(MindFusion.Drawing.Image, content[i]))
{
    let img = content[i];
    // Perform checks if this is the needed image, if not, continue with the iteration
    if (img.image.....)
    {
        // this is the needed image
        image = content[i];
        break;
    }
}