ImGuiStatusBar.cpp

namespace ImGui
{
	// Copy of BeginMenuBar except it's at the bottom
	bool BeginMainStatusBar()
	{
		ImGuiContext& g = *GImGui;
		ImGuiViewport* viewport = g.Viewports[0];
		float height = g.NextWindowData.MenuBarOffsetMinVal.y + g.FontSize + g.Style.FramePadding.y * 2;
		g.NextWindowData.MenuBarOffsetMinVal = ImVec2(g.Style.DisplaySafeAreaPadding.x, ImMax(g.Style.DisplaySafeAreaPadding.y - g.Style.FramePadding.y, 0.0f));
		SetNextWindowPos(ImVec2(viewport->Pos.x, viewport->Pos.y + viewport->Size.y - height));
		SetNextWindowSize(ImVec2(viewport->Size.x, height));
		SetNextWindowViewport(viewport->ID); // Enforce viewport so we don't create our onw viewport when ImGuiConfigFlags_ViewportsNoMerge is set.
		PushStyleVar(ImGuiStyleVar_WindowRounding, 0.0f);
		PushStyleVar(ImGuiStyleVar_WindowMinSize, ImVec2(0,0));
		ImGuiWindowFlags window_flags = ImGuiWindowFlags_NoDocking | ImGuiWindowFlags_NoTitleBar | ImGuiWindowFlags_NoResize | ImGuiWindowFlags_NoMove | ImGuiWindowFlags_NoScrollbar | ImGuiWindowFlags_NoSavedSettings | ImGuiWindowFlags_MenuBar;
		bool is_open = Begin("##MainStatusBar", NULL, window_flags) && BeginMenuBar();
		PopStyleVar(2);
		g.NextWindowData.MenuBarOffsetMinVal = ImVec2(0.0f, 0.0f);
		if (!is_open)
		{
			End();
			return false;
		}
		return true;
	}

	void EndMainStatusBar()
	{
		EndMainMenuBar();
	}
}

ImGuiStatusBar.h

namespace ImGui
{
	// Copy of BeginMenuBar except it's at the bottom
	bool BeginMainStatusBar();
	void EndMainStatusBar();
}