René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Add \"Load from file...\" option to ObjectWidget","articleBody":"As discussed in https://github.com/imagej/imagej-common/issues/71, it would be nice to have a *Load from file...* option whenever we show a choice dropdown for arbitrary objects (including, but not limited to, images) via the `ObjectWidget`.\r\n\r\nThis can possibly be achieved by adding an additional object during the discovery of valid choices here:\r\nhttps://github.com/scijava/scijava-common/blob/560ad964a7a1e859edd4dbe4fc48d7d9e09523f2/src/main/java/org/scijava/widget/AbstractInputHarvester.java#L131-L139\r\n\r\nWe should display this option whenever we find an `IOPlugin` that can open objects of the target type, or convertible to the target type.\r\n\r\nHow can this be achieved? Maybe a custom converter `File` -\u003e anything that provides a suitable `IOPlugin`, but converters have to provide a specific output type, right? Maybe a custom implementation in `ObjectWidget`/`AbstractInputHarvester` is required?\r\n\r\nAlso, how can we achieve that `uiService.chooseFile()` is called (and the file is loaded) only when the input is actually selected and the module processed? Do we have to intercept the `ModuleItem#setValue()` call, or can we do this with a custom `PreprocessorPlugin`?\r\n\r\n(Just writing down some thoughts, before I forget.)\r\n","author":{"url":"https://github.com/imagejan","@type":"Person","name":"imagejan"},"datePublished":"2020-01-17T20:21:08.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":5},"url":"https://github.com/380/scijava-common/issues/380"}