Add option to automatically ungrab mouse

[afdw]

I suggest adding option that will ungrab mouse automatically when reaching breakpoint. At the moment I do this steps every time I'm using breakpoints:

1. Press Alt+F8
2. Type Mouse.setGrabbed(false)
3. Press Enter
4. Press Escape

I think this option will be useful because doing this steps takes much time.

[kashike]

I'm very confused. Could you please better explain what you mean?

[afdw]

Sorry, I was thinking that everyone who was debugging Minecraft related code had this problem. I mean: if you are debugging Minecraft client, when you join the world Minecraft grabs you cursor, so you you can't anymore see your cursor and you can't for example switch applications with mouse. If you open inventory (usually with pressing E), Minecraft will move cursor to the center of its window and ungrab it, so you can see the cursor. When you close inventory Mineraft will grab your cursor again. So if you place breakpoint in place that executed when mouse is grabbed, for example in tick() method of tile entity in place that executed only on server, then when JVM reaches this breakpoint, IDEA will not ungrab your mouse, so you can't move cursor, and you will have to do steps I describe in issue description.

You can see the problem with placing breakpoint is server side (here I mean effective side, not physical).

[Barteks2x]

For me the problem occurs only when the breakpoint is in the clientside code (ie. when client thread reaches the breakpoint). Some systems ungrab the mouse automatically when you do something like alt+tab, some systems unfortunately don't (all linux systems I have worked with don't do that, but it works fine on windows). With IDEA it's possible to workaround this by using some keyboard shortcuts but it's very annoying to do, especially when done frequently.

So if it's possible, the plugin could evaluate org.lwjgl.input.Mouse.setGrabbed(false) when any breakpoint is hit and causes client thread to pause.

In the past when I used IDE that didn't have such keyboard shortcuts I had to resort to creating second X server and attaching debugger there, or creating second mouse cursor which caused many weird GUI glitches because multiple cursors aren't well supported feature.

[DenWav]

I'll have to do some digging into this one. First I need to replicate the issue. I've debugged MC clients before without this issue, so I need to find a way to actually replicate it.

[afdw]

@DemonWav Which OS are you using?

[DenWav]

@afdw Windows 10, macOS Sierra, and Arch Linux with Cinnamon.

[Barteks2x]

It shouldn't be too hard to reproduce it on linux - I used debian and now gentoo with Cinnamon (on debian I also used i3 and xfce) and it happens to me. Adding breakpoint that is first hit by client thread should do it.

[Keridos]

Having the same issue here on arch linux 64 bit with cinnamon.

[DenWav]

I think I've found a good way of testing this, but on macOS it doesn't seem to have this issue. I'll test in Linux later today.

[darkevilmac]

Any progress on this? I've been using openSUSE to develop lately and this is very much still an issue.