termdash/CHANGELOG.md

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# Changelog
All notable changes to this project are documented here.
The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
## [Unreleased]
### Added
- The Button widget.
- A function that draws text vertically.
- The LineChart widget can display X axis labels in vertical orientation.
- The LineChart widget allows the user to specify a custom scale for the Y
axis.
- The LineChart widget now has an option that disables scaling of the X axis.
Useful for applications that want to continuously feed data and make them
"roll" through the linechart.
- The LineChart widget now has a method that returns the observed capacity of
the LineChart the last time Draw was called.
- The LineChart widget now supports zoom of the content triggered by mouse
events.
- The Text widget now has a Write option that atomically replaces the entire
text content.
- A non-blocking event distribution system that can throttle repetitive events.
### Changed
- Termbox is now initialized in 256 color mode by default.
- Generalized mouse button FSM for use in widgets that need to track mouse
button clicks.
- The infrastructure now uses the non-blocking event distribution system to
distribute events to subscribers. Each widget is now an individual
subscriber.
- The infrastructure now throttles event driven screen redraw rather than
redrawing for each input event.
- Widgets can now specify the scope at which they want to receive keyboard and
mouse events.
#### Breaking API changes
##### High impact
- The constructors of all the widgets now also return an error so that they
can validate the options. This is a breaking change for the following
widgets: BarChart, Gauge, LineChart, SparkLine, Text. The callers will have
to handle the returned error.
##### Low impact
- The container package no longer exports separate methods to receive Keyboard
and Mouse events which were replaced by a Subscribe method for the event
distribution system. This shouldn't affect users as the removed methods
aren't needed by container users.
- The widgetapi.Options struct now uses an enum instead of a boolean when
widget specifies if it wants keyboard or mouse events. This only impacts
development of new widgets.
### Fixed
- The LineChart widget now correctly determines the Y axis scale when multiple
series are provided.
- Lint issues in the codebase, and updated Travis configuration so that golint
is executed on every run.
- Termdash now correctly starts in locales like zh_CN.UTF-8 where some of the
characters it uses internally can have ambiguous width.
## [0.6.1] - 12-Feb-2019
### Fixed
- The LineChart widget now correctly places custom labels.
## [0.6.0] - 07-Feb-2019
### Added
- The SegmentDisplay widget.
- A CHANGELOG.
- New line styles for borders.
### Changed
- Better recordings of the individual demos.
### Fixed
- The LineChart now has an option to change the behavior of the Y axis from
zero anchored to adaptive.
- Lint errors reported on the Go report card.
- Widgets now correctly handle a race when new user data are supplied between
calls to their Options() and Draw() methods.
## [0.5.0] - 21-Jan-2019
### Added
- Draw primitives for drawing circles.
- The Donut widget.
### Fixed
- Bugfixes in the braille canvas.
- Lint errors reported on the Go report card.
- Flaky behavior in termdash_test.
## [0.4.0] - 15-Jan-2019
### Added
- 256 color support.
- Variable size container splits.
- A more complete demo of the functionality.
### Changed
- Updated documentation and README.
## [0.3.0] - 13-Jan-2019
### Added
- Primitives for drawing lines.
- Implementation of a Braille canvas.
- The LineChart widget.
## [0.2.0] - 02-Jul-2018
### Added
- The SparkLine widget.
- The BarChart widget.
- Manually triggered redraw.
- Travis now checks for presence of licence headers.
### Fixed
- Fixing races in termdash_test.
## 0.1.0 - 13-Jun-2018
### Added
- Documentation of the project and its goals.
- Drawing infrastructure.
- Testing infrastructure.
- The Gauge widget.
- The Text widget.
[Unreleased]: https://github.com/mum4k/termdash/compare/v0.6.1...devel
[0.6.1]: https://github.com/mum4k/termdash/compare/v0.6.0...v0.6.1
[0.6.0]: https://github.com/mum4k/termdash/compare/v0.5.0...v0.6.0
[0.5.0]: https://github.com/mum4k/termdash/compare/v0.4.0...v0.5.0
[0.4.0]: https://github.com/mum4k/termdash/compare/v0.3.0...v0.4.0
[0.3.0]: https://github.com/mum4k/termdash/compare/v0.2.0...v0.3.0
[0.2.0]: https://github.com/mum4k/termdash/compare/v0.1.0...v0.2.0