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vty-ui v1.4 Release Notes

  • 📦 Package changes:

    • Now builds against GHC 7.4.1 (thanks github.com/elliottt); relaxes dependencies on time (to 1.4), array (to 0.5), and filepath (to 1.4)
    • Now depends on vector >= 0.9.
    • Added a basic README.
    • Added demo programs specific to the ProgressBar and Edit widgets to fully showcase their functionality.

    API changes:

    • Moved Alignment-related code from the Table module into its own module, Graphics.Vty.Widgets.Alignment
    • Progress bars can now have a text label and the label can have an alignment (left, right, or center). Added functions setProgressText and setProgressTextAlignment. The progress bar widget type is now 'Widget ProgressBar', instead of 'ProgressBar' with a record field to access its widget. Lastly, the progress bar constructor takes Attrs, not Colors, to control the display of the two halves of the progress bar (its background and a text label).
    • The newWidget implementation constructor now takes the initial widget state as a parameter to avoid returning WidgetImpl values with an 'undefined' state.
    • Generalized the 'Edit' widget type to support single- and multi-line editing modes. Added functions getEditCurrentLine, getEditLineLimit, setEditLineLimit, and multiLineEditWidget. The 'editWidget' behaves as before and creates a single-line edit widget. Dropped support for limiting the amount of text in a single-line edit widget, but added the ability to control the number of lines in a multi-line edit widget. Since it's possible to get two-dimensional cursor position values for multi-line Edit widgets as a result of these changes, onCursorMove now provides a tuple of (row, column) to its handlers.

    🐛 Bug fixes / improvements:

    • Fixed a bug where hFixed and vFixed widgets were adding too much padding to their child widgets, thus breaking the space guarantees they were intended to make. As an example, if you wrap a widget in a vFixed wrapper with ten lines of height, the bug caused vFixed to sometimes result in widgets that were more than ten lines in height (and similarly for width/hFixed).
    • Fixed a bug where sometimes text widgets didn't apply the right amount of trailing padding to short text lines, resulting in weird background attribute rendering issues.
    • Added some strictness hints to several modules
    • Improved space performance of the List widget by using Vectors to store the list contents
    • newWidget now returns a WidgetImpl with a default (trivial) render_ implementation.
    • Improved the documentation of some functions in Core.
    • Greatly simplified and improved the ListDemo program so it is more useful for learning how to use the List widget.
    • The main event loop no longer calls reserve_display on shutdown (which was just wrong). This leads to a cleaner terminal state when a vty-ui application exits, since Vty's shutdown function was already trying to do the right thing.