QWT是一个QT的第三方库，可以用其来开发各种图形 表格文件。这是最新的版本，加入了新的控件。可以直接在QTDESIGNER里面调用。,The Qwt library contains GUI Components and utility classes which are primarily useful for programs with a technical background. Beside a 2D plot widget it provides scales, sliders,

qwt-5.2.1 非常有名的基于QT的控件，用来绘制2D图形，包括曲线，柱状图等等。-qwt-5.2.1 is known QT-based control, used to draw 2D graphics, including curves, histograms, etc..