ctx.SetScale() can change the position of a click mid-frame

[venning]

(This is really minor for me, but maybe indicates something you'd like to know about.)

I have a couple checkboxes in my UI that allow me to change the screen density between 1x and 2x ("Retina") for testing. I do that by adjusting the values that game.Layout() returns. When doing this, I also change debugui's scale at the same time via ctx.SetScale() to maintain consistent UI scaling.

I noticed that when doing this, the position of the click that caused the event to trigger also gets "rescaled" to a different position and debugui will re-interpret that position and possibly infer another click if that position happens to be over another debugui element that accepts clicks (buttons, checkboxes).

Meaning, I click the "2x" checkbox to rescale while at cursor position (x, y) and the UI does so but also clicks a different button that was corresponding to cursor position (x/2, y/2) before the scale change.

The fix is simple: I delay the call to ctx.SetScale() until the next frame, when there won't be a click to misinterpret.

I don't know if this matters all that much, but I just wanted to note it.

(Really appreciating debugui. It's been the single biggest improvement in my development since Ebitengine itself.)