Can the "Reset" entry on settings menus be removed?

[dhdurgee]

I was just wondering if it would be possible to remove this option from all places in the setting menus. I was thinking about this as I have customized a few Kindles as gifts and while I know not to ever select that option I am unsure if all of those I have given such Kindles to will remember to avoid using it.

I don't know the details on how these menus are being built, but I recently dug up the note on how to add the "Cover option" entry to the menus via:

To enable the "display book cover" option in the settings menu:

1) Create a file at /var/local/java/prefs/BookCover.preference containing the following:
Code:

#User preferences for Book Cover Preferences
#Sun May 29 18:17:30 GMT-06:00 2022
BookCoversEnabled=false
isBCSettingAccessed=true

2) And for `/var/local/KWISClient.db` insert this SQLite row:
Code:

INSERT INTO "main"."experiments" ("extra_identifier", "experiment", "treatment") VALUES ('CuratorBookCovers', 'EREADER_CURATOR_BOOK_COVERS_307723', 'T2');

I would imagine it would be possible to create a KUAL extension to add or remove this menu entry as the user would like. Assuming that the other menu entries are built in a similar manner I would expect it to be possible to address the "Reset" options as well once you know how they are encoded in the configuration.

Has anyone looked into this?

Dave

[luketheduke]

Before 5.13.4 (I think) you might be able to edit a file in /usr/share/webkit-1.0/pillow/, but will the new React Native stuff I'm not sure.

Just my two cents.

Where'd you find the info about adding a "Cover Option"?

[dhdurgee]

Originally Posted by luketheduke

Before 5.13.4 (I think) you might be able to edit a file in /usr/share/webkit-1.0/pillow/, but will the new React Native stuff I'm not sure.

Just my two cents.

Where'd you find the info about adding a "Cover Option"?

Here:

https://www.mobileread.com/forums/sh...20&postcount=3

Dave

[tekkasit]

Before you mess with KWISClient.db, make a backup first.

You can alter the content in KWISClient.db file, but the system "may" reset the values or wipe out the whole database.

[katadelos]

I was wondering when somebody would ask this

There's an undocumented management feature (seemingly only used in Demo Mode) that allows you to enable/disable various features. It doesn't remove them from the UI entirely but does gray out the relevant options in the settings menu, which is the next best thing.

Not sure entirely how it all works as I've never needed this but here are all of the options available:

device.policy.action.discovery.disabled
device.policy.action.experimental.browser.disabled
device.policy.action.experimental.mp3player.disabled
device.policy.action.experimentalmenu.disabled
device.policy.action.kindlestore.disabled
device.policy.action.settings.changelanguage.disabled
device.policy.action.settings.changeprimarydictionary.disabled
device.policy.action.settings.deregistration.disabled
device.policy.action.settings.editdevicename.disabled
device.policy.action.settings.editpassword.disabled
device.policy.action.settings.editpersonalinfo.disabled
device.policy.action.settings.managesocialnetworks.disabled
device.policy.action.settings.menu.factoryrestore.disabled
device.policy.action.settings.toggleannotationsbackup.disabled
device.policy.action.settings.togglepopularhighlights.disabled
device.policy.action.settings.togglepublicnotes.disabled
device.policy.action.settings.turnoffpassword.disabled
device.policy.action.settings.turnonpassword.disabled
device.policy.action.settings.wifisettings.disabled
device.policy.action.togglewireless.disabled
device.policy.id
device.policy.setting.allowpolicywithdtcp
device.policy.setting.policysideload.disabled
device.policy.setting.wifisideload.disabled

These should be added to the "properties" table in appreg.db with the handlerId "dcc". Accepted values are "true" or "false" for everything other than device.policy.id which can be an arbitrary string. The specific policy that you're after is "device.policy.action.settings.menu.factoryrestore .disabled".

[NiLuJe]

Parental controls will also disable this (among other things), IIRC. And it behaves exactly like what @katadelos described, it's grayed out .

[dhdurgee]

Originally Posted by katadelos

I was wondering when somebody would ask this

There's an undocumented management feature (seemingly only used in Demo Mode) that allows you to enable/disable various features. It doesn't remove them from the UI entirely but does gray out the relevant options in the settings menu, which is the next best thing.

Not sure entirely how it all works as I've never needed this but here are all of the options available:

device.policy.action.discovery.disabled
device.policy.action.experimental.browser.disabled
device.policy.action.experimental.mp3player.disabled
device.policy.action.experimentalmenu.disabled
device.policy.action.kindlestore.disabled
device.policy.action.settings.changelanguage.disabled
device.policy.action.settings.changeprimarydictionary.disabled
device.policy.action.settings.deregistration.disabled
device.policy.action.settings.editdevicename.disabled
device.policy.action.settings.editpassword.disabled
device.policy.action.settings.editpersonalinfo.disabled
device.policy.action.settings.managesocialnetworks.disabled
device.policy.action.settings.menu.factoryrestore.disabled
device.policy.action.settings.toggleannotationsbackup.disabled
device.policy.action.settings.togglepopularhighlights.disabled
device.policy.action.settings.togglepublicnotes.disabled
device.policy.action.settings.turnoffpassword.disabled
device.policy.action.settings.turnonpassword.disabled
device.policy.action.settings.wifisettings.disabled
device.policy.action.togglewireless.disabled
device.policy.id
device.policy.setting.allowpolicywithdtcp
device.policy.setting.policysideload.disabled
device.policy.setting.wifisideload.disabled

These should be added to the "properties" table in appreg.db with the handlerId "dcc". Accepted values are "true" or "false" for everything other than device.policy.id which can be an arbitrary string. The specific policy that you're after is "device.policy.action.settings.menu.factoryrestore .disabled".

Sounds like exactly what I was looking for, a way to ensure that a novice user doesn't shoot themselves in the foot.

Is this true of all firmware levels?

Given this I imagine someone with experience could code a KUAL extension to toggle this feature.

Thank you for your assistance.

Dave

[dhdurgee]

Originally Posted by NiLuJe

Parental controls will also disable this (among other things), IIRC. And it behaves exactly like what @katadelos described, it's grayed out .

I don't think I had heard of this feature before. Sounds good for when a child's Kindle is on a parent's account. I guess I could suggest enabling that to whoever I give a gift Kindle to. I assume this has to be enable on Amazon's site, as it would not make sense if the child could turn it off on the Kindle itself.

Dave

[NiLuJe]

@dhdurgee: IIRC, it is enabled on device, in the Settings menu (it requires you to choose a PIN to avoid the aforementioned issue; and I think there's an escape hatch coded... somewhere in case the PIN is forgotten). It probably requires a registered device.