... except Audacity.h
This forces us to make each header contain all forward declarations or nested
headers that it requires, rather than depend on context.
Motivation:
1. The text boxes in the label track are not fully accessible for users of screen readers, and I don't think that they can be made to be fully accessible using the accessibility API used by wxWidgets. When such an edit box becomes the focus, this is not announced, and for NVDA users typed characters are not echoed.
2. Provides a work around for bugs 1778 (cannot type diacritics into text label), and 1804 (Windows: Labels do not accept IME (Chinese/Japanese) input).
Fix: Provide an option for a dialog for entering the name. The text box in the dialog is accessible for screen readers. On windows the text box receives wm_keydown and wm_char messages and so is a work around for bug 1804. Being a standard text box, it will presumably be a work around for bug 1778.
1. There is a new option in track behaviors: "Use dialog for the name of new label", which is off by default.
2. When using the commands "Add label at selection" and "Add label at playback position", when the dialog closes, focus is returned to the track which was the focus before the dialog opened. I think this is more convenient for users of screen readers.
Previously this was hard coded to use the online alphamanual.
Some other help-on-errors paths were hardcoded to use the online manual, and did not use local help even if available, so these were changed too.
Also two naming changes in the code:
ShowHelpDialog() became ShowHelp() because it typically shows the help in your browser, only showing the help in a dialog under certain circumstances.
The helpURL parameter became helpPage since it is usually a page name that is then elaborated into a url.
The Link() function became InnerLink().
Some careful http -> https changes made too.
... Should have no effect on generated code, except perhaps some slight faster
virtual function calls. Mostly useful as documentation of design intent.
Tried to mark every one of our classes that inherits from another, or is a
base for others, or has abstract virtual functions, and a few others besides.
* Fix memory leaks.
* Add comments about initializations and checking for successful results.
* Add checks for NULL deref.
* Consistency in "TODO" vs "TO-DO" comments!
I refactored the code into AudacityApp with a new timer. This is provisional pending discussion - if it is decided that it should go somewhere else I will move it.
When looking for default curves, EQDefaultCurves.xml is searched for in the DataDir first, then the exeDir, then the error dialog is popped up.
Error dialog stays open while user visits web site to get EQDefaultCurves.xml.
The 'normal' set of curves EQCurves.xml is still in DataDir.
