ドラッグ中も値がかわるように修正
ドラッグ中も値がかわるように修正

smalruby/smalruby-editor,smalruby/smalruby-editor,Ikuyadeu/smalruby-editor,takaokouji/smalruby-editor,Ikuyadeu/smalruby-editor,smalruby/smalruby-editor,takaokouji/smalruby-editor,takaokouji/smalruby-editor,Ikuyadeu/smalruby-editor