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Wayland: Clean up pointer axis handler

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(cherry picked from commit 9afbcb442b)
This commit is contained in:
Camilla Löwy 2024-01-16 22:59:35 +01:00
parent 7554375d6d
commit fafcba3824
1 changed files with 3 additions and 13 deletions
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16
src/wl_window.c
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@ -1537,24 +1537,14 @@ static void pointerHandleAxis(void* userData,
wl_fixed_t value)
{
_GLFWwindow* window = _glfw.wl.pointerFocus;
double x = 0.0, y = 0.0;
// Wayland scroll events are in pointer motion coordinate space (think two
// finger scroll). The factor 10 is commonly used to convert to "scroll
// step means 1.0.
const double scrollFactor = 1.0 / 10.0;
if (!window)
return;
assert(axis == WL_POINTER_AXIS_HORIZONTAL_SCROLL ||
axis == WL_POINTER_AXIS_VERTICAL_SCROLL);
// NOTE: 10 units of motion per mouse wheel step seems to be a common ratio
if (axis == WL_POINTER_AXIS_HORIZONTAL_SCROLL)
x = -wl_fixed_to_double(value) * scrollFactor;
_glfwInputScroll(window, -wl_fixed_to_double(value) / 10.0, 0.0);
else if (axis == WL_POINTER_AXIS_VERTICAL_SCROLL)
y = -wl_fixed_to_double(value) * scrollFactor;
_glfwInputScroll(window, x, y);
_glfwInputScroll(window, 0.0, -wl_fixed_to_double(value) / 10.0);
}
static const struct wl_pointer_listener pointerListener =