SDL_HINT_QUIT_ON_LAST_WINDOW_CLOSE will not fire if there are active tray icons. This impacts only applications that create tray icons, and that at least one icon outlives the last visible top-level window. SDL_EVENT_QUIT will fire when the last active tray is destroyed if there are no active windows.
It's too close the 3.2.0 release for an API change like this.
If/when we re-add these, some things for consideration:
* What use cases does this enable that aren't currently possible?
* What cross-platform API guarantees do we make about the availability of these events? e.g. do we try to simulate them where raw input isn't actually available?
* How is this different from the existing relative mode, and how do we clearly explain when you want these events vs wanting relative mode?
Notes from @expikr:
First observation: the reason I originally passed denominators instead of multipliers was because some rational values cannot be exactly represented by floats (e.g 1/120) so instead let the end-developer decide how to do the dividing themselves. It was the reason why it was using split values with an integer numerator to begin with, instead of having both as floats or even just normalize it in advance.
On the other hand, passing them as multipliers might have hypothetical uses for dynamically passing end-user controlled scaling in a transparent manner without coupling? (Though in that case why not just do that as additional fields appended to `motion` structs in an API-compatible layout?)
So it’s somewhat of a philosophical judgement of what this API of optional availability do we intend for it to present itself as:
- should it be a bit-perfect escape hatch with the absolute minimally-denominal abstraction over platform details just enough to be able to serve the full information (á la HIDPIAPI),
- or a renewed ergonomic API for splitting relative motion from cursor motion (in light of The Great Warping Purge) so that it is unburdened by legacy RelativeMode state machines, in which case it would be more appropriate to just call it `RELATIVE` instead of `RAW` and should be added alongside another new event purely for cursor events?
This alternate API stream was conceived in the context of preserving compatibility of the existing RelativeMode state machine by adding an escape hatch. So given the same context, my taste leans towards the former designation.
However, as The Great Warping Purge has made it potentially viable to do so, if I were allowed to break ABI by nuking the RelativeMode state machine entirely, I would prefer the latter designation unified as one of three separate components split from the old state machine, each independently controlled by platform-dependent availability without any state switching of a leaky melting pot:
- cursor visibility controls (if platform has cursor)
- cursor motion events (if platform has cursor)
- relative motion events (if the platform reports hardware motion)
It is not uncommon for clients to redundantly set the window size and position, either as a holdover from an SDL 1 port, when this was required, due to any window state change triggering a universal update function that sets all window state, even if unnecessary (e.g. always calling SDL_SetWindowSize(), even if the window is fullscreen), or due to the use of compatability layers. Historically, these clients expect that their behavior won't override the base window state, which is an assumption that the windowing changes in SDL 3 broke by caching size and position changes that can't be applied immediately.
This change drops size and position requests when the window is in the maximized and fullscreen states (fullscreen-desktop windows will be repositioned, but the non-fullscreen floating position will not be overwritten), which is behavior more in line with existing client assumptions, and should ease the porting process, as well as prevent annoying bugs when older software is run via sdl2-compat.
In the process of making these changes, pending window state has been moved to separate variables in the SDL_Window struct, as this fixes bugs regarding fullscreen display selection and centering windows immediately after resize on asynchronous platforms, which had issues due to pending state possibly being overwritten.
I'm going to reuse that code for an actual drag/drop example later, but for
simplicity and accessibility of the examples, this is just going to load two
wavs and loop them, so you get the music with a sword-clinking sound mixed
over it.
Standard I/O doesn't work well with non-blocking handles, so make sure any pipes are in blocking mode before launching child processes.
Fixes https://github.com/libsdl-org/SDL/issues/10998
