Method TempInputText

external/imgui/imgui_widgets.cpp:3718–3744

Create text input in place of another active widget (e.g. used when doing a Ctrl+Click on drag/slider widgets) - This must be submitted right after the item it is overlaying. FIXME: Facilitate using this in variety of other situations.

// - This must be submitted right after the item it is overlaying.
// FIXME: Facilitate using this in variety of other situations.
bool ImGui::TempInputText(const ImRect& bb, ImGuiID id, const char* label, char* buf, size_t buf_size, ImGuiInputTextFlags flags, ImGuiInputTextCallback callback, void* user_data)
{
    // On the first frame, g.TempInputTextId == 0, then on subsequent frames it becomes == id.
    // We clear ActiveID on the first frame to allow the InputText() taking it back.
    ImGuiContext& g = *GImGui;
    ImGuiWindow* window = g.CurrentWindow;

    const bool init = (g.TempInputId != id);
    if (init)
        ClearActiveID();

    ImVec2 backup_pos = window->DC.CursorPos;
    window->DC.CursorPos = bb.Min;
    g.LastItemData.ItemFlags |= ImGuiItemFlags_AllowDuplicateId; // Using ImGuiInputTextFlags_MergedItem above will skip ItemAdd() so we poke here.
    bool value_changed = InputTextEx(label, NULL, buf, (int)buf_size, bb.GetSize(), flags | ImGuiInputTextFlags_TempInput | ImGuiInputTextFlags_AutoSelectAll, callback, user_data);
    KeepAliveID(id); // Not done because of ImGuiInputTextFlags_TempInput
    if (init)
    {
        // First frame we started displaying the InputText widget, we expect it to take the active id.
        IM_ASSERT(g.ActiveId == id);
        g.TempInputId = g.ActiveId;
    }
    if (g.ActiveId != id)
        g.TempInputId = 0;
    window->DC.CursorPos = backup_pos;
    return value_changed;
}

// Note that Drag/Slider functions are only forwarding the min/max values clamping values if the ImGuiSliderFlags_AlwaysClamp flag is set!
// This is intended: this way we allow Ctrl+Click manual input to set a value out of bounds, for maximum flexibility.