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#ifndef IMGUI_CONTEXT_HPP
#define IMGUI_CONTEXT_HPP
#include "gl_context.hpp"
#include "sdl_context.hpp"
#include "sdl_main_window.hpp"
#include <imgui/imgui.h>
namespace bookmouse {
class ImguiContext {
public:
ImguiContext(GlContext& glContext, SdlContext& sdlContext, SdlMainWindow& mainWindow);
~ImguiContext();
const ImGuiIO& getIO() const;
ImGuiIO& getIO();
void setIOFlag(ImGuiConfigFlags_ flag) const;
bool processEvent(SDL_Event& event) const;
void startFrame() const;
void render() const;
private:
SdlMainWindow& m_mainWindow;
};
template <typename Expr, typename Cleanup>
class ConditionalRaii {
public:
template <typename... Args>
ConditionalRaii(Args&&... args) : m_expr{false}
{
Expr expr{};
m_expr = expr(std::forward<Args>(args)...);
}
~ConditionalRaii()
{
Cleanup cleanup{};
if (m_expr) {
cleanup();
}
}
ConditionalRaii(const ConditionalRaii& rhs) = delete;
ConditionalRaii(ConditionalRaii&& rhs) = delete;
ConditionalRaii& operator=(const ConditionalRaii& rhs) = delete;
ConditionalRaii& operator=(ConditionalRaii&& rhs) = delete;
operator bool() const
{
return m_expr;
}
private:
bool m_expr;
};
#define Imgui ImGui
#define STRUCT_FUNCTOR(FUNCTOR_NAME, FUNCTOR_FUNCTION) \
struct FUNCTOR_NAME { \
auto operator()() -> decltype(FUNCTOR_FUNCTION()) \
{ \
return FUNCTOR_FUNCTION(); \
} \
};
#define STRUCT_FUNCTOR_ARGS(FUNCTOR_NAME, FUNCTOR_FUNCTION) \
struct FUNCTOR_NAME { \
template <typename... Args> \
auto operator()(Args&&... args) -> /* FORCE BREAK */ \
decltype(FUNCTOR_FUNCTION(std::forward<Args>(args)...)) \
{ \
return FUNCTOR_FUNCTION(std::forward<Args>(args)...); \
} \
};
STRUCT_FUNCTOR_ARGS(ImBeginMenuBar, Imgui::BeginMenuBar)
STRUCT_FUNCTOR(ImEndMenuBar, Imgui::EndMenuBar)
using ImMenuBar = ConditionalRaii<ImBeginMenuBar, ImEndMenuBar>;
STRUCT_FUNCTOR_ARGS(ImBeginMenu, Imgui::BeginMenu)
STRUCT_FUNCTOR(ImEndMenu, Imgui::EndMenu)
using ImMenu = ConditionalRaii<ImBeginMenu, ImEndMenu>;
STRUCT_FUNCTOR_ARGS(ImBeginPopupModal, Imgui::BeginPopupModal)
// N.B. EndPopup is needed for BeginPopupModal
STRUCT_FUNCTOR(ImEndPopupModal, Imgui::EndPopup)
using ImPopupModal = ConditionalRaii<ImBeginPopupModal, ImEndPopupModal>;
STRUCT_FUNCTOR_ARGS(ImBeginTable, Imgui::BeginTable)
STRUCT_FUNCTOR(ImEndTable, Imgui::EndTable)
using ImTable = ConditionalRaii<ImBeginTable, ImEndTable>;
// STRUCT_FUNCTOR_ARGS(Im
#undef Imgui
#undef STRUCT_FUNCTOR
#undef STRUCT_FUNCTOR_ARGS
constexpr auto ImBegin = ImGui::Begin;
constexpr auto ImEnd = ImGui::End;
inline void ImSameLine(float xOffset = 0.0, float spacing = 0.0)
{
ImGui::SameLine(xOffset, spacing);
}
#define ImText ImGui::Text
inline bool ImButton(const char* label, const ImVec2& size = ImVec2(0, 0))
{
return ImGui::Button(label, size);
}
constexpr auto ImGetTime = ImGui::GetTime;
inline void ImNextRow(ImGuiTableRowFlags row_flags = 0, float min_row_height = 0.0f)
{
ImGui::TableNextRow(row_flags, min_row_height);
}
constexpr auto ImNextColumn = ImGui::TableNextColumn;
#define ImSelectable ImGui::Selectable
} // namespace bookmouse
#endif
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