基于Qt的画图程序，实现了基本的画图，包含多种图形的显示-Qt-based drawing program, basic drawing, contains a variety of graphics display

窗口下用QPainter实现各种图形的绘制，并可选画笔线宽,画笔颜色，画笔线型等，以及区域图内的填充样式，填充颜色-Using QPainter to draw many kinds of graphics under the Window environment. User can select optionally pen width, pen color, pen linestyle, as well as regional area of the fill style and fil

QT编程，实现点线画图功能，在界面上动态加载点线曲线连接图形。-Qpainter on QT