Method NavUpdateCreateMoveRequest

src/imgui/imgui.cpp:13699–13815

}

void ImGui::NavUpdateCreateMoveRequest()
{
    ImGuiContext& g = *GImGui;
    ImGuiIO& io = g.IO;
    ImGuiWindow* window = g.NavWindow;
    const bool nav_gamepad_active = (io.ConfigFlags & ImGuiConfigFlags_NavEnableGamepad) != 0 && (io.BackendFlags & ImGuiBackendFlags_HasGamepad) != 0;
    const bool nav_keyboard_active = (io.ConfigFlags & ImGuiConfigFlags_NavEnableKeyboard) != 0;

    if (g.NavMoveForwardToNextFrame && window != NULL)
    {
        // Forwarding previous request (which has been modified, e.g. wrap around menus rewrite the requests with a starting rectangle at the other side of the window)
        // (preserve most state, which were already set by the NavMoveRequestForward() function)
        IM_ASSERT(g.NavMoveDir != ImGuiDir_None && g.NavMoveClipDir != ImGuiDir_None);
        IM_ASSERT(g.NavMoveFlags & ImGuiNavMoveFlags_Forwarded);
        IMGUI_DEBUG_LOG_NAV("[nav] NavMoveRequestForward %d\n", g.NavMoveDir);
    }
    else
    {
        // Initiate directional inputs request
        g.NavMoveDir = ImGuiDir_None;
        g.NavMoveFlags = ImGuiNavMoveFlags_None;
        g.NavMoveScrollFlags = ImGuiScrollFlags_None;
        if (window && !g.NavWindowingTarget && !(window->Flags & ImGuiWindowFlags_NoNavInputs))
        {
            const ImGuiInputFlags repeat_mode = ImGuiInputFlags_Repeat | (ImGuiInputFlags)ImGuiInputFlags_RepeatRateNavMove;
            if (!IsActiveIdUsingNavDir(ImGuiDir_Left)  && ((nav_gamepad_active && IsKeyPressed(ImGuiKey_GamepadDpadLeft,  repeat_mode, ImGuiKeyOwner_NoOwner)) || (nav_keyboard_active && IsKeyPressed(ImGuiKey_LeftArrow,  repeat_mode, ImGuiKeyOwner_NoOwner)))) { g.NavMoveDir = ImGuiDir_Left; }
            if (!IsActiveIdUsingNavDir(ImGuiDir_Right) && ((nav_gamepad_active && IsKeyPressed(ImGuiKey_GamepadDpadRight, repeat_mode, ImGuiKeyOwner_NoOwner)) || (nav_keyboard_active && IsKeyPressed(ImGuiKey_RightArrow, repeat_mode, ImGuiKeyOwner_NoOwner)))) { g.NavMoveDir = ImGuiDir_Right; }
            if (!IsActiveIdUsingNavDir(ImGuiDir_Up)    && ((nav_gamepad_active && IsKeyPressed(ImGuiKey_GamepadDpadUp,    repeat_mode, ImGuiKeyOwner_NoOwner)) || (nav_keyboard_active && IsKeyPressed(ImGuiKey_UpArrow,    repeat_mode, ImGuiKeyOwner_NoOwner)))) { g.NavMoveDir = ImGuiDir_Up; }
            if (!IsActiveIdUsingNavDir(ImGuiDir_Down)  && ((nav_gamepad_active && IsKeyPressed(ImGuiKey_GamepadDpadDown,  repeat_mode, ImGuiKeyOwner_NoOwner)) || (nav_keyboard_active && IsKeyPressed(ImGuiKey_DownArrow,  repeat_mode, ImGuiKeyOwner_NoOwner)))) { g.NavMoveDir = ImGuiDir_Down; }
        }
        g.NavMoveClipDir = g.NavMoveDir;
        g.NavScoringNoClipRect = ImRect(+FLT_MAX, +FLT_MAX, -FLT_MAX, -FLT_MAX);
    }

    // Update PageUp/PageDown/Home/End scroll
    // FIXME-NAV: Consider enabling those keys even without the master ImGuiConfigFlags_NavEnableKeyboard flag?
    float scoring_rect_offset_y = 0.0f;
    if (window && g.NavMoveDir == ImGuiDir_None && nav_keyboard_active)
        scoring_rect_offset_y = NavUpdatePageUpPageDown();
    if (scoring_rect_offset_y != 0.0f)
    {
        g.NavScoringNoClipRect = window->InnerRect;
        g.NavScoringNoClipRect.TranslateY(scoring_rect_offset_y);
    }

    // [DEBUG] Always send a request when holding CTRL. Hold CTRL + Arrow change the direction.
#if IMGUI_DEBUG_NAV_SCORING
    //if (io.KeyCtrl && IsKeyPressed(ImGuiKey_C))
    //    g.NavMoveDirForDebug = (ImGuiDir)((g.NavMoveDirForDebug + 1) & 3);
    if (io.KeyCtrl)
    {
        if (g.NavMoveDir == ImGuiDir_None)
            g.NavMoveDir = g.NavMoveDirForDebug;
        g.NavMoveClipDir = g.NavMoveDir;
        g.NavMoveFlags |= ImGuiNavMoveFlags_DebugNoResult;
    }
#endif