[BUG] default action on ENTER/double click

[roentgen]

TC refusez to open .ico files on double click or pressing enter.
I have default Windows file associations
Still they open up just fine in explorer with the 'Windows Picture and Fax Viewer' and on right click the default menu entry 'Preview' appears both in TC and explorer
Diging into registry I see there actually is no real association for .ico files but there's a strange looking key (how tipical...)

Code: Select all

"PerceivedType"="image"

wich seems to tell explorer to look further into

Code: Select all

HKEY_CLASSES_ROOT\SystemFileAssociations\image

Same thing with some other extensions wich have "PerceivedType"="text" that open with Notepad only in explorer

[icfu]

For the 8395th time:
TC prefers user key HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\ when double clicking. If user key contains wrong associations it doesn't continue looking in the machine key, that's why it fails.

So, check HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.ico, this is the "open with" key. If you delete it, everything will work again.

This key is also deleted when you reassign .ico with File->Associate. Nah, actually it's not the key but an entry in that key, ProgID or so.

That "PerceivedType" stuff has no effect in TC, it's only relevant for Explorer. ghisler hasn't emulated Explorer behaviour completely, he can only try to guess what it's doing.

Icfu

[roentgen]

Even so... does not seem any good to me... it's a loss of functionality to the less experienced users

[ghisler(Author)]

"PerceivedType"="image"

Sorry, Total Commander does not use this key. It's not well documented by Microsoft, and I will therefore not support it. Just associate .ico with a program.

[Lefteous]

2ghisler(Author)

Sorry, Total Commander does not use this key. It's not well documented by Microsoft, and I will therefore not support it. Just associate .ico with a program.

http://msdn.microsoft.com/library/en-us/shellcc/platform/shell/programmersguide/shell_basics/shell_basics_extending/fileassociations/fa_intro.asp

This is not the first time I posted this link.

[ghisler(Author)]

This article is a big mess. It's not really clear which association has priority in which cases. I also don't understand why ShellExecuteEx doesn't work with these types...

[Lefteous]

2ghisler(Author)
Could you please describe which are the different cases you are talking about?

[majkinetor !]

I am waiting....

[roentgen]

It's not really clear which association has priority in which cases.

Talking from my own experience, the priority works as folows:
1. settings under HKEY_CURRENT_USER
2. settings under HKEY_CLASSES_ROOT\.ext
3. settings under HKEY_CLASSES_ROOT\SystemFileAssociations which under circumstances that (1) or (2) exist add aditional options to the right click menu.

2icfu
HKEY_CURRENT_USER\....\Explorer\FileExts is empty and read only on my system just because of similar problems I had.

[icfu]

2icfu
HKEY_CURRENT_USER\....\Explorer\FileExts is empty and read only on my system just because of similar problems I had.

What are you waiting for then? Reassign HKCR\.ico to a working app and it will work.

The order is already documented to the fully extent in http://msdn.microsoft.com/library/en-us/shellcc/platform/shell/programmersguide/shell_basics/shell_basics_extending/fileassociations/fa_perceived_types.asp?frame=true so you don't need to "guess" it.

Icfu

[roentgen]

Reassign HKCR\.ico to a working app and it will work.

It is already working... but not in TC

need to "guess" it.

(just a few posts up)

It's not really clear which association has priority in which cases.

[icfu]

It is already working... but not in TC

It's probably working because of the SystemFileAssociations key which TC ignores. I have told you to reassign .ico from inside TC to a valid program, you haven't commented that so I think you haven't even tried.

There is no reason why .ico double click should not work if HKCR\.ico association is correct.

Icfu

[Balderstrom]

Looks similiar to HTML to me:

The system defines several PerceivedTypes in Microsoft Windows XP. These include the following:
Image
Text
Audio
Video
Compressed
System

Though appears to be of no use to those using Win2K or prior MS-OS's.
Course if it was utilized properly, looks like it would get rid of the necessity of having a few thousand .ext settings in the registry.
Probably become more relevant in the not too distant future where what a file is will be determined by the fileHeader or possibly meta-data and not an obtuse 3 character extension.

[Lefteous]

2ghisler(Author)
Hi,

I found an API function which could help you to work with perceived types:
http://msdn.microsoft.com/library/en-us/shellcc/platform/shell/reference/shlwapi/registry/assocgetperceivedtype.asp

The function seems to be as new as perceived types itself.

There are some other functions in the same category which might be helpful to escape association hell.

[ghisler(Author)]

Interesting, thanks - but seems to require Windows XP Service Pack 2 (SP2), according to the article you sent me. And it doesn't tell me what to do with that information either.