使用Python实现win32下IconOverlay开发-优快云博客

本文链接：https://blog.youkuaiyun.com/zhuqiang00/article/details/7228733

本文介绍如何在Windows环境下，利用Python实现文件和文件夹图标的覆盖（Icon Overlay）。通过理解Windows的Icon Overlay原理，学习相关接口和接口实现，以及参考TortoiseSVN的实现，读者将掌握创建自定义Icon Overlay的技术。文章包含概念解析、动手实践及源码参考。

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目标：在现有Python客户端中实现文件夹和文件图标覆盖[Icon Overlay]

适用范围： win32 系统 , python2.6

构思：

第一阶段：学习Window Icon Overlay实现概念

直观了解

[转载] How to overlay an icon over existing shell objects in 3 easy steps

阐述原理

[转载] Creating Icon Overlay Handlers

Icon overlays are small images placed at the lower-left corner of the icon that represents a Shell object. They are normally added to an object's icon to provide some extra information. For instance, a commonly used icon overlay is the small arrow that indicates that the icon represents a link, rather than the actual file or folder. In addition to the standard icon overlays that are provided by the system, you can request custom icon overlays for specified Shell objects by implementing and registering an icon overlay handler.

Note The number of different icon overlay handlers that the system can support is limited by the amount of space available for icon overlays in the system image list. There are currently fifteen slots allotted for icon overlays, some of which are reserved by the system. For this reason, icon overlay handlers should be implemented only if there are no satisfactory alternatives.

[转载] How to Implement Icon Overlay Handlers

Icon overlay handlers are in-process Component Object Model (COM) objects, implemented as DLLs.

They export one interface in addition to IUnknown: IShellIconOverlayIdentifier.

This interface has three methods:

IShellIconOverlayIdentifier::GetOverlayInfo

IShellIconOverlayIdentifier::GetPriority

IShellIconOverlayIdentifier::IsMemberOf

成功案例

[转载]The documentation for the TortoiseOverlays project explains how they use it and the problems they have encountered (username: guest, empty password), and the GPL'ed sourcecode is in the Subversion repository (same username/password as above)