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CHANGELOG.md

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Version 1.4.0 (3 Aug 2026)

  • Added Bayesian analysis: run MCMC sampling alongside classical fitting, with posterior median and credibility intervals on the main chart, trace/corner-style plots per parameter, a dedicated status display with cancellation support, and plot export.
  • Bayesian results are now cleared whenever they become stale: on project create/load/reset, when a classical fit starts, and when a new sampling run starts. Previously the posterior overlays, plots and the "Bayesian Sampling Results" dialog could show results from a superseded run or a different project.
  • Cancelling a fit now keeps the UI locked until the worker thread actually exits, and late signals from a superseded worker are ignored. This prevents two fits from mutating the shared parameters concurrently when the minimizer cannot abort mid-run (lmfit, DFO).
  • Bayesian sampling no longer fails for data files without uncertainty/resolution columns: missing ye falls back to zero variances (reported by the sampler with a clear message) and the unused xe is no longer attached to the Q coordinate.
  • Fixed wrong parameter group/display names for the first and last layers of each assembly: the parameter-tree walker now prefers the canonical layers container over the front_layer/back_layer alias properties.
  • Removed the unused corner dependency.
  • Migrated to the new easyscience core API surface exposed by reflectometry-lib:
    • Layer removal now calls remove_at(index); the lib's index-based remove was replaced by standard MutableSequence.remove(value) semantics.
    • Parameter discovery uses get_all_parameters().
  • Breaking: project files saved by earlier versions (predating file_format=2) can no longer be opened. Opening one now shows a clear error dialog instead of failing uncaught; affected projects must be recreated.

Version 1.3.0 (1 May 2026)

  • Migrated the application to the new EasyApplication module and removed the old EasyApp footer dependency.
  • Combined layer and model editors and fixed list handling/stability issues.
  • Improved residuals display, including zero-value handling, correct scaling, and better log-scale support.
  • Updated chart and analysis UI: dotted experiment lines, better legend symbols, and improved plot colors.
  • Fixed experiment color display for partial experiment selections.
  • Added a DFO-style fitting status display with animated "Fitting running ..." dots and a status-bar counter.
  • Improved experiment tab behavior for changed resolution percentages.
  • Updated chart reset controls and reset iconography.
  • Improved app reset behavior and empty-project wording.
  • Enabled Windows code signing and updated installation links for v1.3.0.
  • Miscellaneous bug fixes and usability improvements.

Version 1.2.0 (1 March 2026)

Added ORSO file parser Added simple constraints Added model-model constraints Enabled multi-sample display Enabled multi-experiment display Improved plotting Enhanced status bar display Moved SLD plot to main display