Colormap.hpp

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// This file is part of INSTINCT, the INS Toolkit for Integrated
// Navigation Concepts and Training by the Institute of Navigation of
// the University of Stuttgart, Germany.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at https://mozilla.org/MPL/2.0/.
 
 
#pragma once
 
#include <imgui.h>
#include <imgui_internal.h>
#include <optional>
#include <functional>
#include <string>
#include <vector>
#include "util/Json.hpp"
 
namespace NAV
{
 
class Colormap;
 
bool ColormapButton(const char* label, Colormap& cmap, const ImVec2& size_arg);
 
void to_json(json& j, const Colormap& cmap);
void from_json(const json& j, Colormap& cmap);
 
class Colormap
{
  public:
    Colormap();
 
    void addColor(double value, ImColor color);
 
    void removeColor(size_t idx);
 
    [[nodiscard]] ImColor getColor(double value, const ImColor& defaultColor) const;
 
    [[nodiscard]] int64_t getId() const;
 
    [[nodiscard]] const std::vector<std::pair<double, ImColor>>& getColormap() const;
 
    std::string name = "Colormap"; 
    bool discrete = false;         
    size_t version = 0;            
 
  private:
    int64_t id;
    std::vector<std::pair<double, ImColor>> colormap = { { 0.0, ImColor(1.0F, 1.0F, 1.0F, 1.0F) } };
 
    void render() const;
 
    void render(const ImRect& bounds) const;
 
    friend bool NAV::ColormapButton(const char* label, Colormap& cmap, const ImVec2& size_arg);
 
    friend void to_json(json& j, const Colormap& cmap);
    friend void from_json(const json& j, Colormap& cmap);
};
 
extern std::vector<Colormap> ColormapsGlobal;
extern std::vector<Colormap> ColormapsFlow;
 
enum class ColormapMaskType : int
{
    None,   
    Global, 
    Flow,   
};
 
bool ShowColormapSelector(ColormapMaskType& type, int64_t& id, const char* label = "");
 
std::optional<std::reference_wrapper<const Colormap>> ColormapSearch(const ColormapMaskType& type, const int64_t& id);
 
} // namespace NAV