retta

let Usepline = {use: false};
pline.addEventListener('click', ()=> {
    changeTool(pline); changeUseTool(Usepline);
    ctx.strokeStyle = pcolor.value;

    let onepress = false, posX=0,posY=0;
    workSheet.addEventListener('click', e => {
        if(Usepline.use){
            if(e.button==0){
                if(!onepress){
                    console.log(onepress);
                    posX = e.offsetX; posY = e.offsetY;
                    console.log(posX,posY);
                    onepress = true;
                }
            }
        }
    });
    workSheet.addEventListener('click', e => {
        if(Usepline.use){
            if(e.button==0){
                if(onepress){
                    console.log(onepress);
                    ctx.beginPath();
                    ctx.moveTo(posX,posY);
                    console.log(posX,posY);
                    ctx.lineTo(e.offsetX,e.offsetY); ctx.stroke();
                    console.log(e.offsetX,e.offsetY);
                    ctx.closePath();
                    onepress = false;
                }
            }
        }
    });
});