文件名称:MyMinDrawing
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一个画图小程序MiniDraw，要求画直线(Line)，椭圆(Ellipse)，矩形(Rectangle)，多边形(Polygon)等图形元素(图元)。
每种图元需用一个类（对象）来封装，如Line, Ellipse, Rect, Polygon, Freehand；
各种图元可从一个父类Figure来继承；
每种图元的绘制不一样，但是绘制接口在父类中是一样，因此可学习和使用类的多态性。
-Paint a small program MiniDraw, asked to draw a straight line (Line), oval (Ellipse), rectangle (Rectangle), polygons (Polygon) and other graphic elements (primitives). Each element required a class (object) to the package, such as Line, Ellipse, Rect, Polygon, Freehand the various elements can be inherited a parent class Figure each draw primitives are not the same, but the drawing interface in the parent class is the same, so you can learn and use class polymorphism.
每种图元需用一个类（对象）来封装，如Line, Ellipse, Rect, Polygon, Freehand；
各种图元可从一个父类Figure来继承；
每种图元的绘制不一样，但是绘制接口在父类中是一样，因此可学习和使用类的多态性。
-Paint a small program MiniDraw, asked to draw a straight line (Line), oval (Ellipse), rectangle (Rectangle), polygons (Polygon) and other graphic elements (primitives). Each element required a class (object) to the package, such as Line, Ellipse, Rect, Polygon, Freehand the various elements can be inherited a parent class Figure each draw primitives are not the same, but the drawing interface in the parent class is the same, so you can learn and use class polymorphism.
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下载文件列表
MyMinDrawing\main.cpp
............\mainwindow.ui
............\MyMinDrawing.pro
............\MyMinDrawing.pro.user
............\MyMinDrawing.qrc
............\picture\Delete.jpg
............\.......\Ellipse.jpg
............\.......\FreeHand.jpg
............\.......\Line.jpg
............\.......\Polygon.jpg
............\.......\Rectangle.jpg
............\Resource\ellipse.cpp
............\........\ellipse.h
............\........\figure.cpp
............\........\figure.h
............\........\freehand.cpp
............\........\freehand.h
............\........\line.cpp
............\........\line.h
............\........\polygon.cpp
............\........\polygon.h
............\........\rectangle.cpp
............\........\rectangle.h
............\Widgets\mainwindow.cpp
............\.......\mainwindow.h
............\.......\viewwidget.cpp
............\.......\viewwidget.h
............\picture
............\Resource
............\Widgets
MyMinDrawing