温度计控件  GDI++

各种钟表、温度计等图形显示，非常漂亮，容易移植到自己程序中来-All kinds of watches and clocks, thermometers and other graphics, very beautiful, easy to transplant

该例子实现了Qwt里面的一个简单的温度计与滚轮的功能，能够通过滚动滚轮改变温度的大小-This example implements a simple thermometer and wheel functionality Qwt inside, able to change the temperature by rolling the wheel size