Release History

Statestep 1.3

Automatic opening of windows showing data in a newly-opened model.

Load/save custom colour scheme.

Better feedback and improved handling of several errors and warnings.

For environments where Java's Open/Save file dialogs may be excessively slow, the native OS file chooser is now used instead by default. (The default file chooser can be toggled by passing Statestep a new '-n' option, e.g., "java -jar statestep.jar -n").

Statestep 1.2

Faster, more flexible editing and display of tables:

• Allow a single click of the middle button of a three-button mouse as an alternative to double-clicking to select / unselect values.
• Quick-select a value in a rule target row cell: if the desired value is displayed in the source row then hold down Shift or Control and double-click (or middle-click) on the value there; the value will be copied to the cell below it.
• Keyboard shortcuts to quickly toggle display options.
• New display option to mix selected and unselected values in a single fixed list (stops values jumping around when editing).

In the constraint table, values which are obviously impossible because they are unselected are no longer coloured. This makes values coloured by the "Show inferences" display option easy to see; it is also more consistent with the way the Explain function works.

Case-insensitive searching of formulas.

Undo/redo improvements:

• Ctrl-Z (undo) and Ctrl-Y (redo) keyboard shortcuts work in all windows.
• The number of actions that can be undone is increased to 50.
• Better descriptions of undoable actions.
• For consistency, changes to a navigator rule's event are now recorded for undo/redo.

Bugs fixed:

• Some windows not always fully refreshed after an undo.
• Constraint table often scrolls vertically for no apparent reason.

Statestep 1.1

Undo, redo.

Allow variables to be re-ordered; this changes the order of columns in the tables.

XSLT script 's2-html.xsl' is no longer included (instead, a template to produce a HTML version of a model is available separately).

Bugs fixed:

• Unnecessary restriction on the maximum number of variables.
• Misleading prompt for a default value on deletion of the only variable.

Statestep 1.0

New 'Explore' menu with:

• Multiple rule navigator windows: three navigators are now available – allowing the existing contents of a navigator to be preserved while using another one to search for a rule, etc.
• Find Formulas: search for text in constraint or rule formulas.
• Statistics: get a report on the number of possible cases and the percentage of cases covered by the rules for each event.

You can now search for rules that would overlap or conflict with the rule shown in a navigator window if the events were ignored. This makes it easy to find all rules, regardless of event, in which (for example) the value of a particular variable changes.

Comments in formulas: '#' is now the standard character for line comments ('//' comments are still supported).

Help: improvements to content, including the addition of a glossary; simpler, faster browser.

Hyperlinks for constraints listed in explanations and other windows.

Removal of the only third-party library – simplifying the licence and reducing the program size by 200K.

Other minor improvements, for example, better automatic sizing of rule windows.

Bugs fixed:

• Glitch in rule window layout on the appearance of a horizontal scrollbar.
• Formula text in navigator window not cleared on opening a new model.
• Workaround for memory retention bug found in some versions of Java.

Statestep v0.6

Default file format for models changed to XML (".s2" extension). Models saved using older versions can be imported by first clicking File->New Model to clear any existing data (if necessary), then File->Commands.

Model Info: a title and description can now be associated with each model.

Various minor improvements.

Statestep v0.5

"Export to XML" function, facilitating automatic code generation (code generation templates available separately).

"Export to HTML" function removed: HTML can be derived from a model in XML form using an XSLT stylesheet (included).

Bug fixed: Rules not saved for events following an event for which no rules have been defined.

Statestep v0.4

Additional constraint table display options (similar to those for rules) available by right-clicking in the table; option to show derived inferences also moved to this popup menu.

Autodeletion of dependent rules when a variable value is deleted (see tutorial).

Listing of formulas needing to be checked and autodeleted rules when a variable or variable value is deleted.

Rule scrolling: in a window displaying a rule, holding down the Alt key and pressing, e.g., the cursor down key causes the window to be replaced by one showing the next rule for the same event.

Descriptions for variables, variable values, events.

Various minor improvements, for example, improved initial window positioning (for this to work, you need Java version 1.5, a.k.a. Java 5.0).

Bugs fixed:

• Autodeletion of rules on variable deletion sometimes not completing or producing transient internal error.
• Memory leak: resources retained for a rule each time its window is opened and closed (until that rule is deleted).
• Iconified windows not automatically deiconified when requested.
• Documentation: rule autodeletion not described.
• Documentation: missing file "activitiesOutcomes.step".
• Documentation: various minor fixes.

Statestep v0.3

Table editing much improved:

• Change contents of table cells by double clicking on values or through pop-up menu (no longer necessary to open separate window to edit cell).
• Copy and paste blocks of table cells between rules and from one part of the constraint table to another.
• Change all selected cells to contain don't care, no change, or to be empty.

Change rule display mode via pop-up menu in rule (right-click); can now also decide not to display unselected values or to expand don't cares.

Renaming of variables, values, events, constraints and rules.

Export model to HTML (output format subject to future change).

Various minor improvements (presentation, etc.)

Bugs fixed:

• Blank explanation from Rule Navigator for values impossible due to an event constraint.
• Violations sometimes not checked in navigator window until event selected.
• Occasional internal error on opening another model to replace current one.
• Occasional inclusion of empty variables in rule windows leading to internal error.
• Minor graphics-related or other bugs not affecting functionality.

Statestep v0.2

First publicly-available version.