ImguiHandler.h

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/*  Copyright (C) 2003-2021 Free Electron Organization
    Any use of this software requires a license.  If a valid license
    was not distributed with this file, visit freeelectron.org. */

/** @file */

#ifndef __imgui_ImguiHandler_h__
#define __imgui_ImguiHandler_h__

namespace fe
{
namespace ext
{

/**************************************************************************//**
    @brief Dear Imgui draw and event handler

    @ingroup imgui
*//***************************************************************************/
class FE_DL_EXPORT ImguiHandler:
    virtual public HandlerI,
    public CastableAs<ImguiHandler>
{
    public:
                ImguiHandler(void);
virtual         ~ImguiHandler(void);

virtual void    handle(Record& render);

    protected:

virtual void    updateGUI(void)                                             {}
virtual void    drawOverlay(void)                                           {}

        sp<DrawI>                   m_spDrawI;

        Vector2                     m_pixelScale;
        Vector2i                    m_windowPosition;
        Vector2i                    m_windowSize;

    private:
        AsViewer                    m_asViewer;
        WindowEvent                 m_event;


        I32                         m_mouseX;
        I32                         m_mouseY;
        WindowEvent::MouseButtons   m_mouseButtons;
};

} /* namespace ext */
} /* namespace fe */

//* see <imgui>/misc/cpp/imgui_stdlib.h
namespace ImGui
{

// ImGui::InputText() with fe::String
// Because text input needs dynamic resizing,
// we need to setup a callback to grow the capacity
IMGUI_API bool InputText(const char* label,
        fe::String* str,
        ImGuiInputTextFlags flags = 0,
        ImGuiInputTextCallback callback = NULL,
        void* user_data = NULL);
IMGUI_API bool InputTextMultiline(const char* label,
        fe::String* str,
        const ImVec2& size = ImVec2(0, 0),
        ImGuiInputTextFlags flags = 0,
        ImGuiInputTextCallback callback = NULL,
        void* user_data = NULL);
IMGUI_API bool InputTextWithHint(const char* label,
        const char* hint,
        fe::String* str,
        ImGuiInputTextFlags flags = 0,
        ImGuiInputTextCallback callback = NULL,
        void* user_data = NULL);

} // namespace ImGui

#endif /* __imgui_ImguiHandler_h__ */