Python implementation of popocat Recycle Bin icon replacement

1. The premise to prepare / Thought record （ Thinking process , The disorderly ！）

At the beginning, various search engines , Blog , Data collection , Preparation , The following steps are optimized in the later stage , At the beginning, I recorded all kinds of useful , It's a mess , Code / The finished product can be viewed directly from the back

Via desktop 【 Right click 】—>【 Individualization 】—>【 The theme 】—>【 Desktop icon settings 】—>【 Change icon 】 You can see that the default icon is imageres.dll , This is a windos Default icon library .

Win 10 Style icon library has ：

1. ddores.dll

2. dmdskres.dll

3. imageres.dll

4. mmres.dll

5. networkexplorer.dll

6. pnidui.dll

7. sensorscpl.dll

8. setupapi.dll

9. shell32.dll

10. wmploc.dll

11. wpdshext.dll For more information, please refer to the blog ：Windos Icon dll

1.1. Thought record

When I didn't know anything at first , Thinking about , Write a program to automatically replace this dll, Call the website to convert the icon format ： transformation ico Then write a program to run ;
The procedure is mainly divided into the following parts ：

1. Replace dll

2. Call the website to convert the icon format 【 Optional 】, It can also be called by program

3. Automatically generate new dll【 Is difficult , Optional 】emmmm, It's not very big , You can refer to post （C++）

4. Modify registry , Update the value of the recycle bin

5. Desktop icon registry correspondence

1.2. pythonmagick

Third-party module （ At first I wanted to write GUI, eureka TKInterDesigner, But there are BUG, My computer doesn't work , Put it on hold ）：
pythonmagick, You can't pip install, Manual required download , Pay attention to the version and CPU framework （ Check... By command pip debug --verbose, My is cp38-cp38-win_amd64）！cp10 Corresponding python edition 3.10,cp38 Corresponding python edition 3.8

import PythonMagickimg = PythonMagick.Image("logo.png") # Load the image to be converted img.sample('64x64') # Set the generated icon Size img.write("logo.ico") # Generate icon And save 

Where the Recycle Bin icon is located ：

1. 【 Restore 】 Location of the recycle bin default icon ： HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{645FF040-5081-101B-9F08-00AA002F954E}\DefaultIcon

2. 【 change 】 The location of the recycle bin custom icon ： HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\CLSID\{645FF040-5081-101B-9F08-00AA002F954E}\DefaultIcon

   Items under the directory empty 、 full The value of corresponds to empty and full recycle bin respectively （ Non empty ） When icon Icon position ;

• If in the registry [HKEY_CURRENT_USER\Software\Classes\CLSID]（WIN9X） or [HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\CLSID]（WIN2000/XP） The icon or name of a system folder is defined in , It will take precedence over [ HKEY_CLASSES_ROOT\CLSID ]. My computer on the desktop 、 My documents 、 Icons and names such as network places are defined here .

• The types of values of items are REG_EXPAND_SZ, The data are ： ( Default )： %SystemRoot%\System32\imageres.dll,-55 Empty： %SystemRoot%\System32\imageres.dll,-55 Full： %SystemRoot%\System32\imageres.dll,-54

2. The code analysis

2.1. ICO Icon conversion

take icons The pictures in the folder are converted to ico File and store it in iocn Under the folder ;

import osimport PythonMagickdef get_files(): filenames = os.listdir(os.path.join(os.getcwd(), 'icons')) for index, item in enumerate(filenames): filenames[index] = './icons/' + item return filenamesdef convert(sava_path): if not os.path.exists(sava_path) or os.path.isfile(sava_path): os.mkdir(sava_path) else: os.mkdir(sava_path) filenames = get_files() for item in filenames: img = PythonMagick.Image(item) # Load the image to be converted img.sample('256x256') # Set the generated icon Size img.write('./icon/' + item[8:len(item) - 3] + 'ico') # Generate icon And save if __name__ == '__main__': convert("icon")

2.2. Generate dll

Here I pass VS Create a new DLL project , Then import the... From the previous step ico file , Then generate . You can also directly ico The suffix to dll, In this case, the next step of code related logic also needs to be changed a little .

1. Create a dynamically linked library project
   

2. Add resource file （ico Icon ）

   

3. Generate dll

   

4. From the generated path dll Copy （ Scrapbooking is OK ） One spare .

2.3. Modify registry

dll Files need to be stored locally , So I chose to store it in TEMP Under the folder , It can also be stored in other folders , Storage in... Is not recommended system32 Next .

import osimport winregdll_name = "cookie_icon.dll"dll_dir_path = os.path.join(os.getenv("TEMP"), "{645FF040-5081-101B-9F08-00AA002F954E}")dll_file_path = os.path.join(dll_dir_path, dll_name)key = winreg.OpenKey(winreg.HKEY_CURRENT_USER, r"Software\\Microsoft\\Windows\\CurrentVersion\\" r"Explorer\\CLSID\\{645FF040-5081-101B-9F08-00AA002F954E}" r"\\DefaultIcon", 0, winreg.KEY_ALL_ACCESS)try: winreg.SetValueEx(key, "empty", 0, winreg.REG_EXPAND_SZ, dll_file_path + ",0") winreg.SetValueEx(key, "full", 0, winreg.REG_EXPAND_SZ, dll_file_path + ",1") print(" Replacement successful ~ Double click the recycle bin to view the effect ") # TODO: Join the refresh mechanism , Refresh the desktop , After implementation, you can see the icon update effect without clicking the recycle bin # At present, most of them are found on the Internet taskkill explorer.exe And then restart , It will cause the desktop to jam temporarily , Generating zombie processes os.system("pause")except WindowsError as e: print("WindowsError: " + e)finally: winreg.CloseKey(key)

3. Results display

results ！ My energy ！！！ Sobbing ~

4. Resource sharing

The relevant code has been packaged as exe 了 , Just run directly （ Limited to Windows）,mac Never played , I do not know! , A little . Link fetch ;
Use pyinstaller pack ：

pyinstaller -F -i ./popocat_full.ico popocat.py

Generate a single file exe, But there is no way to package external files into exe in , There are self extracting packages that can be packed in , But it can not achieve the desired effect .
So Baidu found Enigma Virtual Box Package software .

After packaging exe Self taking

5. summary

Although the actual code looks short , But if you really don't understand it, you really can't write it out , First, choose Java, It seems that the bottom layer of the operating system still needs to be found C Language , Switch to C After the language is written , But I have a headache writing about handles , Finally found out winreg This python library , It really works , Put a lot of useless （ Strictly speaking , Is not commonly used ） The parameters of are encapsulated .

If you're okay, you have to do more , Much more trouble , Life is gone .
author ： My eyelashes are in my eyes ！

Game programming , A game development favorite ~

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