スライダー

https://scrapbox.io/files/64dcd4e62e92e8001b5cc090.png

code:スライダー.cpp

# include <Siv3D.hpp>

class Slider {

public:

double value = 1.0;

RectF rect;

bool activeFlg = false;

//double 初期値(0～1),RectF 配置する四角形

Slider(double value, const RectF& rect) :value{ value }, rect{ rect } {}

//返り値はスライダーの値

double update() {

if (rect.stretched(15).mouseOver())Cursor::RequestStyle(CursorStyle::Hand);

if (rect.stretched(15).leftClicked())activeFlg = true;

if (activeFlg) {

Cursor::RequestStyle(CursorStyle::Hand);

value = Clamp(Cursor::PosF().x - rect.x, 0.0, rect.w) / rect.w;

if (MouseL.up())activeFlg = false;

}

return value;

}

void draw(const ColorF& color = { 0.3, 0.5, 1.0 })const {

rect.draw(Palette::Gray);

RectF{ rect.pos,value * rect.w,rect.h }.draw(color);

RoundRect(Arg::center(value * rect.w + rect.x, rect.center().y), 20, 50, 10).draw();

}

//0～1を返す

double getValue() {

return value;

}

//操作中ならtrue

bool isActive() {

return activeFlg;

}

};

void Main()

{

Slider slider{ 0.5,RectF{Arg::center = Scene::Center(),400,10} };

while (System::Update())

{

slider.update();

slider.draw();

}

}