I worte an external procedure which returns an image. Now I want to add an additional image showing a legend to exactly this dynamically created image. Unfortunately I have no idea how I can make sure that this legend is connected to the image created in the external procedure.
Any idea how to solve this?
Return a tuple:
IN EXTERNAL METHOD: def image_processing_function(): return image1, image2
IN DTML TEMPLATE: <dtml-let images="image_processing_function()"> <dtml-var expr="images[0]"> <dtml-var expr="images[1]"> </dtml-let>
That'll try to inline the images, which won't work. If you want to create them at the same time, you'll probably have to create a folder with two images in it, and store it somehow. Your external method would want to return the name of the created container. The better answer is to make two methods (one for image, one for key) and give both methods the same parameters so they can create images on the same information. That won't work if you have non-parameterized controls (random or external), in which case you'll have to figure out some sort of index/snapshot scheme. --jcc