Method EndFrame

libs/imgui/imgui.cpp:2899–2987

This is normally called by Render(). You may want to call it directly if you want to avoid calling Render() but the gain will be very minimal.

// This is normally called by Render(). You may want to call it directly if you want to avoid calling Render() but the gain will be very minimal.
void ImGui::EndFrame()
{
    ImGuiContext& g = *GImGui;
    IM_ASSERT(g.Initialized);                       // Forgot to call ImGui::NewFrame()
    if (g.FrameCountEnded == g.FrameCount)          // Don't process EndFrame() multiple times.
        return;

    // Notify OS when our Input Method Editor cursor has moved (e.g. CJK inputs using Microsoft IME)
    if (g.IO.ImeSetInputScreenPosFn && ImLengthSqr(g.OsImePosRequest - g.OsImePosSet) > 0.0001f)
    {
        g.IO.ImeSetInputScreenPosFn((int)g.OsImePosRequest.x, (int)g.OsImePosRequest.y);
        g.OsImePosSet = g.OsImePosRequest;
    }

    // Hide implicit "Debug" window if it hasn't been used
    IM_ASSERT(g.CurrentWindowStack.Size == 1);    // Mismatched Begin()/End() calls
    if (g.CurrentWindow && !g.CurrentWindow->WriteAccessed)
        g.CurrentWindow->Active = false;
    ImGui::End();

    if (g.ActiveId == 0 && g.HoveredId == 0)
    {
        if (!g.NavWindow || !g.NavWindow->Appearing) // Unless we just made a window/popup appear
        {
            // Click to focus window and start moving (after we're done with all our widgets)
            if (g.IO.MouseClicked[0])
            {
                if (g.HoveredRootWindow != NULL)
                {
                    FocusWindow(g.HoveredWindow);
                    if (!(g.HoveredWindow->Flags & ImGuiWindowFlags_NoMove) && !(g.HoveredRootWindow->Flags & ImGuiWindowFlags_NoMove))
                    {
                        g.MovingWindow = g.HoveredWindow;
                        g.MovingWindowMoveId = g.MovingWindow->MoveId;
                        SetActiveID(g.MovingWindowMoveId, g.HoveredRootWindow);
                        g.ActiveIdClickOffset = g.IO.MousePos - g.MovingWindow->RootWindow->Pos;
                    }
                }
                else if (g.NavWindow != NULL && GetFrontMostModalRootWindow() == NULL)
                {
                    // Clicking on void disable focus
                    FocusWindow(NULL);
                }
            }

            // With right mouse button we close popups without changing focus
            // (The left mouse button path calls FocusWindow which will lead NewFrame->CloseInactivePopups to trigger)
            if (g.IO.MouseClicked[1])
            {
                // Find the top-most window between HoveredWindow and the front most Modal Window.
                // This is where we can trim the popup stack.
                ImGuiWindow* modal = GetFrontMostModalRootWindow();
                bool hovered_window_above_modal = false;
                if (modal == NULL)
                    hovered_window_above_modal = true;
                for (int i = g.Windows.Size - 1; i >= 0 && hovered_window_above_modal == false; i--)
                {
                    ImGuiWindow* window = g.Windows[i];