using metadata custom in an export dialog box?

Hi all

I'm currently mired in my first attmpt to create a plugin to export from Lr and, as expected, have hit a wall. As I came through the example of code that does what I'm trying to do, I wonder if anyone here can have some tips.

The goal is to use metadata custom photos selected to fill an export service provider dialog box. This will be used to export to form paths for proper output, generate a manifest of text file (containing the data that will be used by an external workflow), and then copy the raw files properly is renowned for the output path.

The custom metadata and the creation of export dialog box worked fine. I am struck by the problem is that I can't get the metadata of such out of the LrTask that I should call the photo: getPropertyForPlugin() from the inside. Inside the call function, data are there; recorder: trace () print it to the console. But what is the appropriate way to return the data within this service in, say, a propertyTable so that it can be picked up and used elsewhere in the code?

Below is a simplified version of what I'm trying. It would seem that the dialog box creates the static_text until the function running in an AsyncTask() filled the value for him. Is it possible to force the sequence of events and cause the dialogue to wait there a value for its use? What is the most obvious thing that I'm doing wrong here?

Thanks much for any help!

Erik

local photo = catalogue: getTargetPhoto()

getCustomMetadata (propertyTable) of the local service

LrTasks.startAsyncTask (function()

propertyTable.mymetadata = picture: getPropertyForPlugin ('com.myid.myplugin', "mymetadata")

end)

end

function exportDialogSections.startDialog (propertyTable)

getCustomMetadata (propertyTable)

end

function exportDialogSections.sectionsForTopOfDialog (f, propertyTable)

return {}

{

title = "Test."

{f: Row}

{static_text: f}

title = propertyTable.mymetadata,

},

},

},

}

end

Plugins to handle this is to run all their logic within a single asynchronous task.  But in your case, I don't see how this approach could be used, since you can't control when sectionsForTopOfDialog() is called.

You could have sectionsForTopOfDialog() survey politely until the task finishes:

function exportDialogSections.sectionsForTopOfDialog (f, propertyTable)
    local done = false
    LrTasks.startAsyncTask (function ()
        propertyTable.mymetadata =
            photo:getPropertyForPlugin ('com.myid.myplugin', 'mymetadata')
        done = true
        end)
    local delay = 0.01
    while not done do
        LrTasks.sleep (delay)
        delay = math.min (0.1, 2 * delay)
        end

   return {{title =  "Test",
        f:row {f:static_text {title =  propertyTable.mymetadata}}}}
    end

Tags: Photoshop Lightroom

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