On Fri, 24 Jan 2020 01:01:32 GMT, Joel Christensen wrote:

On macOS Catalina 10.15, Dlang 2.088.1

It keeps skipping a button name change. eg Tra,la,Tra,la,li - should be Tra,la,li,Tra,la,li (cycling properly). It often two calls to onButtonPress with only one click.

Try changing line #121 to:

writeln("Partner button label has changed to: ", labelNumber, ", ", newLabel);

It makes little sense, but this cleared it up for me. I'm curious if it does so for you, too.

I changed line #121 as a step toward debugging and when, after compiling, I ran it, I couldn't get it to skip again. The only explanation I can come up with is that the GTK main loop needed an extra micro-second to get back into sync. Doing this one extra little step (which amounts to about three lines of machine language) it got the delay it needed so it could properly process input. Just a guess.

Please let me know.