GraphicConsole.h

// Copyright(c) 2019 - 2020, #Momo
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#pragma once

#include "Utilities/ImGui/ImGuiBase.h"

#include <functional>

namespace MxEngine
{
    class GraphicConsole
    {
        char               InputBuf[256];
        ImVector<char*>    Items;
        ImVector<char*>    History;
        int                HistoryPos;  // -1: new line, 0..History.size-1 browsing history.
        ImVec2             size;
        ImGuiTextFilter    Filter;
        bool               AutoScroll;
        bool               ScrollToBottom;

        void ExecCommand(const char* command);
        int TextEditCallback(ImGuiInputTextCallbackData* data);
        using EventCallback = std::function<void(const char*)>;
        EventCallback eventCallback = nullptr;

        friend int TextEditCallbackStub(ImGuiInputTextCallbackData*);
    public:
        GraphicConsole();
        GraphicConsole(const GraphicConsole&) = delete;
        ~GraphicConsole();

        void SetEventCallback(EventCallback&& callback);
        void PrintHistory();
        void ClearLog();
        void PrintLog(const char* fmt, ...);
        void Draw(const char* title);
        ImVec2 GetSize() const;
        void SetSize(ImVec2 size);
    };
}