Button.h

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// ----------------------------------------------------------------------------
// -                        CloudViewer: www.cloudViewer.org                  -
// ----------------------------------------------------------------------------
// Copyright (c) 2018-2024 www.cloudViewer.org
// SPDX-License-Identifier: MIT
// ----------------------------------------------------------------------------
 
#pragma once
 
#include "visualization/gui/UIImage.h"
#include "visualization/gui/Widget.h"
 
#include <functional>
 
namespace cloudViewer {
namespace visualization {
namespace gui {
 
class Button : public Widget {
public:
    explicit Button(const char* title);
    explicit Button(std::shared_ptr<UIImage> image);
    ~Button();
 
    const char* GetText() const;
    void SetText(const char* text);
 
    float GetHorizontalPaddingEm() const;
    float GetVerticalPaddingEm() const;
    void SetPaddingEm(float horiz_ems, float vert_ems);
 
    bool GetIsToggleable() const;
    void SetToggleable(bool toggles);
 
    bool GetIsOn() const;
    void SetOn(bool is_on);
 
    Size CalcPreferredSize(const LayoutContext& context,
                           const Constraints& constraints) const override;
 
    DrawResult Draw(const DrawContext& context) override;
 
    void SetOnClicked(std::function<void()> on_clicked);
 
private:
    struct Impl;
    std::unique_ptr<Impl> impl_;
};
 
}  // namespace gui
}  // namespace visualization
}  // namespace cloudViewer