Fixed an important bug related to counting a token multiple time

Fixed an important bug related to counting a token multiple time

• This problem has occurred since version 2.4.0

Fix issue related to opening a saved file

2.4.3

Fix issue related to opening a saved file

Fix issue related to closing application

2.4.1

Fix condition of saving file in setOnCloseRequest and Upgrade Versian…

Changes to PGen for better user experience

1. Add apply with enter key when user wants to edit an edge properties. This means user can press enter key to apply changes of edge like pressing apply button.
2. When user saves or opens a file once, in other savings or openings of files the last path that user had chosen, can be remembered.
3. When user press Check Graphs, if an edge has no token, in PGen the error was shown only with "Token can not be empty" message. Replace it with better error with giving start and end node of the edge that has no token.
4. Sometimes users may forget save files and press close button of program accidentally. For this problem, we will warn user whether he/she wants to save the program or not.

Fix issue corresponding to moving on graph

The list of tokens has a higher priority than the list of sub-graphs and
when moving on a graph, even if there is a token in the sub-graphs, the
token on the edge is still selected to move. Also our priority is to
move on the edge or sub-graph instead of going back to the top graph.

Fix issues

- Add better message when unhandled exception happen
- Detect recursive graphs

Imporvement

• Make UI more reactive
• Add shortcut for menu items
• Add new option for create new parser without closing application
• Save menu item saves changes to last chosen file
• Make error messages more clearer
• Add options to reorder graph list
• Fix version number in about menu
• Fix window icon

v2.1.1

Fix Bug: Support loop on a node with nullable variables

v2.1: Fix Bugs:

- Token and Function semantic can contain space and other special character
- Detect invalid token or function
- Add debug mode to parser

v2.0

PGen Version 2