制作一个能绘制任意图形的交互界面 它包括：可编辑文本框、弹出框、列表框。本例的关键内容是：如何使编辑框允许输入多行指令。 -Produced a drawing arbitrary graphics interface which includes: editable text boxes, pop-up box, list box. Key elements of this case is: how to make the edit box to allow the importati