Associate *.dos filename extension with DialogOS in installer

[alexanderkoller]

We chose "*.dos" as the default filename extension for DialogOS dialog models (e.g. in file chooser dialogs). If possible, we should offer the user to associate this filename extension with DialogOS in the installer, so dialog models can be opened by double-click.

[timobaumann]

(presumably, untested) done for Windows and Macos in https://github.com/dialogos-project/dialogos-distribution/commit/e55613a1742aa43ef6b189937b3421a911dec09c

[timobaumann]

haven't heard back about this, so closing under the assumption that it does work.

[alexanderkoller]

On MacOS the filename extension doesn't work. We should look into this.

I haven't tested it on Windows, but let's leave the issue open until we have positive evidence that it works.

[alexanderkoller]

The students have reported that the filename extension doesn't work on Windows (with DialogOS 2.0.1, where I changed the filename extension in the install4j config file to "dos" instead of ".dos" - maybe that was a Verschlimmbesserung?).

[alexanderkoller]

It looks like the changes I made to the install4j file for 2.0.3 now associate the "*.dos" extension with DialogOS, both on MacOS and Windows. However, double-clicking does not work correctly:

• On Mac, DialogOS is started, and the main screen is shown (New dialog/open dialog), but the file is not opened.
• On Windows, no DialogOS GUI comes up. The error.log file indicates that DialogOS tried to start, but thought it was opened with invalid command-line arguments.

[alexanderkoller]

I think the easiest way to fix this would be to change the command-line arguments so you can just say

dialogos <modelfile.dos>

instead of

dialogos -model <modelfile.dos>

Does anyone see a problem with this?

[akoehn]

I think that dialogos <modelfile.dos> is what most people would expect when running dialogos from the command line.

[timobaumann]

I'd think dialogos modelfile.dos should load the file, yes. does dialogos -model modelfile.dos immediately start the interaction? or is there a second switch for that?

[alexanderkoller]

This works on Windows now.

On MacOS, when I double-click on a .dos file, DialogOS is opened, but the .dos file is not loaded. This is because the double-clicked file is not passed as an ordinary command-line parameter on recent versions of MacOS. Instead, the DialogOS Java program is called with no command-line arguments. We need to figure out how to do this - maybe there's a way with install4j, but I couldn't find it.

[alexanderkoller]

Seems to work for Urs Peter on MacOS Mojave.