Method AddMouseSourceEvent

src-core/imgui/imgui.cpp:1596–1601

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.

// 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.
void ImGuiIO::AddMouseSourceEvent(ImGuiMouseSource source)
{
    IM_ASSERT(Ctx != NULL);
    ImGuiContext& g = *Ctx;
    g.InputEventsNextMouseSource = source;
}

void ImGuiIO::AddFocusEvent(bool focused)
{