Method AddMouseWheelEvent

KBotExt/imgui/imgui.cpp:1556–1573

Queue a mouse wheel event (some mouse/API may only have a Y component)

// Queue a mouse wheel event (some mouse/API may only have a Y component)
void ImGuiIO::AddMouseWheelEvent(float wheel_x, float wheel_y)
{
	IM_ASSERT(Ctx != NULL);
	ImGuiContext& g = *Ctx;

	// Filter duplicate (unlike most events, wheel values are relative and easy to filter)
	if (!AppAcceptingEvents || (wheel_x == 0.0f && wheel_y == 0.0f))
		return;

	ImGuiInputEvent e;
	e.Type = ImGuiInputEventType_MouseWheel;
	e.Source = ImGuiInputSource_Mouse;
	e.EventId = g.InputEventsNextEventId++;
	e.MouseWheel.WheelX = wheel_x;
	e.MouseWheel.WheelY = wheel_y;
	e.MouseWheel.MouseSource = g.InputEventsNextMouseSource;
	g.InputEventsQueue.push_back(e);
}

// This is not a real event, the data is latched in order to be stored in actual Mouse events.
// This is so that duplicate events (e.g. Windows sending extraneous WM_MOUSEMOVE) gets filtered and are not leading to actual source changes.