VisualizerWithKeyCallback.h

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// ----------------------------------------------------------------------------
// -                        Open3D: www.open3d.org                            -
// ----------------------------------------------------------------------------
// Copyright (c) 2018-2024 www.open3d.org
// SPDX-License-Identifier: MIT
// ----------------------------------------------------------------------------
 
#pragma once
 
#include <map>
 
#include "open3d/visualization/visualizer/Visualizer.h"
 
namespace open3d {
namespace visualization {

class VisualizerWithKeyCallback : public Visualizer {
public:
    typedef std::pair<int, std::function<bool(Visualizer *)>> KeyCallbackPair;
 
public:
    VisualizerWithKeyCallback();
    ~VisualizerWithKeyCallback() override;
    VisualizerWithKeyCallback(const VisualizerWithKeyCallback &) = delete;
    VisualizerWithKeyCallback &operator=(const VisualizerWithKeyCallback &) =
            delete;
 
public:
    void PrintVisualizerHelp() override;
    void RegisterKeyCallback(int key,
                             std::function<bool(Visualizer *)> callback);

    void RegisterKeyActionCallback(
            int key, std::function<bool(Visualizer *, int, int)> callback);

    void RegisterMouseMoveCallback(
            std::function<bool(Visualizer *, double, double)> callback);

    void RegisterMouseScrollCallback(
            std::function<bool(Visualizer *, double, double)> callback);

    void RegisterMouseButtonCallback(
            std::function<bool(Visualizer *, int, int, int)> callback);
 
protected:
    void KeyPressCallback(GLFWwindow *window,
                          int key,
                          int scancode,
                          int action,
                          int mods) override;
    void MouseMoveCallback(GLFWwindow *window, double x, double y) override;
    void MouseScrollCallback(GLFWwindow *window, double x, double y) override;
    void MouseButtonCallback(GLFWwindow *window,
                             int button,
                             int action,
                             int mods) override;
    std::string PrintKeyToString(int key);
 
protected:
    std::map<int, std::function<bool(Visualizer *)>> key_to_callback_;
    std::map<int, std::function<bool(Visualizer *, int, int)>>
            key_action_to_callback_;
    std::function<bool(Visualizer *, double, double)> mouse_move_callback_;
    std::function<bool(Visualizer *, double, double)> mouse_scroll_callback_;
    std::function<bool(Visualizer *, int, int, int)> mouse_button_callback_;
};
 
}  // namespace visualization
}  // namespace open3d