Playground: Incorrect focus logic

[vtereshkov]

Despite the fact that floooh/sokol#822 is now closed, it has not resolved our problems with the moving rectangle example in the web playground:

1. When I build tophat with the official Sokol, the text area doesn't receive any keystrokes at all -- they are all caught by the example window.

2. When I return false from _sapp_emsc_key_cb(), all keys are caught by both the text area and the example window

Built with Emscripten 3.1.10.

[skejeton]

When we were having issues with SAVESCUM de-focusing I applied quick fix so that every time you resize and click the window, it will focus on the canvas.

If you use the shell.html from tophat - that is the reason.

[vtereshkov]

@skejeton Do you mean we need to implement switching the input focus between the text area and the example window? Are you sure this is possible with the official Sokol? Great if it is. But your SaveScum build was using a customized Sokol fork.

[marekmaskarinec]

I did some changes to the playground and I can now finally recreate your issue.

[marekmaskarinec]

I found the issue: the newly added event bubble up options were not enabled by tophat. I fixed this in the recent commit. Now it is possible to use the text box. However the issue with both the text box and the game catching the inputs is still there. This issue will require some more work.

[marekmaskarinec]

The new playground is now uploaded to the website.

[vtereshkov]

I tested the moving rectangle example with the latest version. The only problem is that the WASD keys, when entered in the text area, are also caught by the example window. This is a slightly annoying bug, but not a release blocker,