在一个窗口中实现手动画图,窗口中右击可弹出菜单,选中菜单中的的”选择颜色”和”选择线型”可以选择颜色和线型画图-Implemented manually in a window drawing, right-click to pop-up menu window, select the menu' s " Select Color"　and " select line"　you can choose the color and line drawing