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Fix trackpad scroll bounce in ImGui panels

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SoftFever
2026-10-15 15:34:05 +08:00
parent 20c157b0f4
commit 92b5301bf6
3 changed files with 67 additions and 3 deletions
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src/slic3r/GUI/ImGuiWrapper.cpp
+5 -3
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@@ -505,10 +505,12 @@ bool ImGuiWrapper::update_mouse_data(wxMouseEvent& evt)
io.MouseDown[0] = evt.LeftIsDown();
io.MouseDown[1] = evt.RightIsDown();
io.MouseDown[2] = evt.MiddleIsDown();
float wheel_delta = static_cast<float>(evt.GetWheelDelta());
if (wheel_delta != 0.0f) {
// Only a vertical wheel event with a direction is a wheel step. A macOS trackpad reports sideways motion
// as separate horizontal events, and its wheel events often carry a rotation of 0: wx truncates the
// sub-pixel deltas to whole ones and passes on events with no delta at all. Read as vertical steps,
// either kind scrolls against the gesture, and scrolling up bounces back and forth.
if (evt.GetWheelAxis() == wxMOUSE_WHEEL_VERTICAL && evt.GetWheelRotation() != 0)
io.MouseWheel = evt.GetWheelRotation() > 0 ? 1.f : -1.f;
}
unsigned buttons = (evt.LeftIsDown() ? 1 : 0) | (evt.RightIsDown() ? 2 : 0) | (evt.MiddleIsDown() ? 4 : 0);
m_mouse_buttons = buttons;