spk_scroll_bar.hpp

#pragma once
 
#include "structure/widget/spk_icon_button.hpp"
#include "structure/widget/spk_linear_layout.hpp"
#include "structure/widget/spk_slider.hpp"
#include "type/spk_enablement.hpp"
#include "type/spk_orientation.hpp"
 
#include <cstdint>
 
namespace spk
{
    class ScrollBar : public spk::Widget
    {
    private:
        spk::IconButton _lowerButton;
        Slider _slider;
        spk::IconButton _raiseButton;
 
        float _step = 0.1f;
        uint32_t _minimalWidth = 16;
        uint32_t _minimalLength = 0;
 
        spk::VerticalLayout _verticalLayout;
        spk::HorizontalLayout _horizontalLayout;
        spk::Orientation _orientation = spk::Orientation::Vertical;
 
        spk::IconButton::Contract _lowerButtonContract;
        spk::IconButton::Contract _raiseButtonContract;
 
        spk::Enablement _buttonVisibility = spk::Enablement::Enable;
 
        void _applyOrientation();
        void _applyMinimalWidth();
        void _applyMinimalLength();
        spk::Vector2UInt _minimalSize() const;
        void _updateButtonLayout();
 
    protected:
        void _onGeometryChange() override;
 
    public:
        ScrollBar(const std::wstring &p_name, spk::Widget *p_parent);

        void setStep(const float &p_step);
        void setMinimalWidth(uint32_t p_width);
        uint32_t minimalWidth() const;
        void setMinimalLength(uint32_t p_length);
        uint32_t minimalLength() const;
        void increase();
        void decrease();
        float ratio() const;
        void setOrientation(spk::Orientation p_orientation);

        spk::IconButton &lowerButton();
        const spk::IconButton &lowerButton() const;
        spk::IconButton &raiseButton();
        const spk::IconButton &raiseButton() const;

        Slider &slider();
        const Slider &slider() const;

        void setButtonVisibility(spk::Enablement p_visibility);
    };
}