Daniele Paganelli wrote: > I noticed that if I set the same input and output dataset in an > operation plugin, the output dataset will result totally empty with even > no possibility to restore old data.
The problem is that veusz doesn't really know what datasets were used to produce the output dataset. The plugin should probably reject input datasets which are output datasets. An undo appears to work for me however and restores the original dataset. The problem is that the dataset plugin mechanism is intended as a sort of spreadsheet-like dependency analysis. Veusz needs to know that it can call the plugin to generate a particular dataset. When the output depends on the input this will break down. A possibility might be if the plugin returns some sort of flag which indicates a static dataset, so the generated dataset doesn't have any dependencies on itself. This could be just saved as data when the document is saved. If you really do want to do anything to the document, a tools plugin might be what you really want. You can generate new datasets within the plugin, read in files, even create new datasets using dataset plugins. It won't have the dependency analysis however and will be a one-time operation. Jeremy _______________________________________________ Veusz-discuss mailing list Veusz-discuss@gna.org https://mail.gna.org/listinfo/veusz-discuss
