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Ignore the first hover event with a stale position on iOS

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Fixes https://github.com/libsdl-org/SDL/issues/15450

(cherry picked from commit 3c02de2f7c)
This commit is contained in:
Sam Lantinga
2026-04-25 07:24:53 -07:00
parent 396cd2d7f7
commit 70d4363890
1 changed files with 5 additions and 0 deletions
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5
src/video/uikit/SDL_uikitpen.m
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@@ -124,6 +124,11 @@ static void UIKit_HandlePenAxes(SDL_Window *window, NSTimeInterval nstimestamp,
// rotation is in radians, and only available on a later iOS.
const float rotation = rollAngle * radians_to_degrees; // !!! FIXME: this might need adjustment, I don't have a pencil that supports it.
if (force == 0.0f && (SDL_GetPenStatus(penId, NULL, 0) & SDL_PEN_INPUT_DOWN)) {
// The first hover as the pen is being released has a stale position, so ignore it
return;
}
SDL_SendPenMotion(timestamp, penId, window, point->x, point->y);
SDL_SendPenAxis(timestamp, penId, window, SDL_PEN_AXIS_PRESSURE, pressure);
SDL_SendPenAxis(timestamp, penId, window, SDL_PEN_AXIS_XTILT, xtilt);