Combobox.h

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// ----------------------------------------------------------------------------
// -                        Open3D: www.open3d.org                            -
// ----------------------------------------------------------------------------
// Copyright (c) 2018-2024 www.open3d.org
// SPDX-License-Identifier: MIT
// ----------------------------------------------------------------------------
 
#pragma once
 
#include <functional>
 
#include "open3d/visualization/gui/Widget.h"
 
namespace open3d {
namespace visualization {
namespace gui {
 
class Combobox : public Widget {
public:
    Combobox();
    explicit Combobox(const std::vector<const char*>& items);
    ~Combobox() override;
 
    void ClearItems();
    int AddItem(const char* name);

    void ChangeItem(int index, const char* name);
    void ChangeItem(const char* orig_name, const char* new_name);

    void RemoveItem(const char* name);
    void RemoveItem(int index);
 
    int GetNumberOfItems() const;

    const char* GetItem(int index) const;
 
    int GetSelectedIndex() const;
    const char* GetSelectedValue() const;
    void SetSelectedIndex(int index);
    bool SetSelectedValue(const char* value);
 
    Size CalcPreferredSize(const LayoutContext& context,
                           const Constraints& constraints) const override;
 
    DrawResult Draw(const DrawContext& context) override;

    void SetOnValueChanged(
            std::function<void(const char*, int)> on_value_changed);
 
private:
    struct Impl;
    std::unique_ptr<Impl> impl_;
};
 
}  // namespace gui
}  // namespace visualization
}  // namespace open3d