In the GoF book "Design Patterns : Elements of Reusable Object-Oriented Software", there is a Case-Study that shows how to employ the patterns. They namely describe the way to use the Composite design pattern for graphical purpose. (Using Glyphs, a glyphs being a graphical component).
They base their case-study on a real text/graphical editor called Lexi.
Unluckily for you, the code is in DELPHI, not C++. But the code is here: LEXI.
However, it is explained among the thourough explanations of the Gang of Four book. You should take a look at the book if the site explanations aren't clear enough.
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在 GoF 的书“设计模式：可重用面向对象软件的元素”中，有一个案例研究展示了如何使用这些模式。它们即描述了将复合设计模式用于图形目的的方法。 （使用 Glyphs，字形是图形组件）。
他们的案例研究基于一个名为 Lexi 的真实文本/图形编辑器。
不幸的是，代码是 DELPHI 语言，而不是 C++ 语言。但代码在这里：LEXI。
不过，《四人帮》这本书的详尽解释之中，却有解释。如果网站解释不够清楚，你应该看看这本书。
In the GoF book "Design Patterns : Elements of Reusable Object-Oriented Software", there is a Case-Study that shows how to employ the patterns. They namely describe the way to use the Composite design pattern for graphical purpose. (Using Glyphs, a glyphs being a graphical component).
They base their case-study on a real text/graphical editor called Lexi.
Unluckily for you, the code is in DELPHI, not C++. But the code is here: LEXI.
However, it is explained among the thourough explanations of the Gang of Four book. You should take a look at the book if the site explanations aren't clear enough.
Inkscape 可能就是您所寻找的，它是一个流行的开源矢量图形编辑器（大部分）用 C++ 编写。
https://code.edge.launchpad.net/~inkscape.dev
Inkscape might be what your searching for, it is a popular open source vector graphics editor written (mostly) in c++.
https://code.edge.launchpad.net/~inkscape.dev