0
我有這14個矩形的行;我只想顯示5行數,讓用戶滾動到可以看到所有14行。如何繪製可滾動的東西?
for(i=0;i<(canvas.height-200)/RECT_H;i++){
drawRecord(Math.floor((Math.random()*10000)+1),x,y);
y+=RECT_H;
}
function drawRecord(number,x,y){
context.strokeRect(x, y, RECT_W, RECT_H);
context.strokeRect(x+RECT_W, y, RECT_W*2, RECT_H);
context.font = 15 + 'px Lucida Sans';
context.fillText(number, x-10*number.toString().length,y+RECT_H/1.5);
}
我如何能實現呢?