Fallback

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There are two fallback mechanisms for a custom-skin:

1. What you see if a sub section is lacking (types/states sections):
   then you see normally the things specified in the main section. In some cases (.hover) you see then Opera`s general hover color - a bright violet in 10.0. You cannot change this color in itself, but you can insert a separate subsection for .hover with the desired color or images, eg for the scrollbar knobs.


2. What you see if a main section is lacking:
   then it depends on the `Version=` setting in [Info] and the `Fallback background=` / `Fallback foreground=` settings in [Options] what you see. That can be a section from the current-skin or a section from the standard-skin (therefore you should never change the filename/path of the standard-skin!).
   In this skin guide you find detailed fallback information for every mentioned skin section, see the example downwards the page.

Enable/disable fallback to the standard-skin in [Options]:
The following setting in the [Options] section affects the fallback if a main section is lacking (see 2. above)

• Fallback foreground = 1 fallback to the standard-skin for foreground elements enabled (0: disabled, default if no entry: 1)
  With the strongly recommended value 1 you can be sure, that lacking or future foreground elements appears in your custom-skin - taken from the current standard-skin. The value 0 you should only use for testing purposes!


• Fallback background = 1 fallback to the standard-skin for background elements enabled (0: disabled, default if no entry: 1)
  With the strongly recommended value 1 you can be sure, that lacking or future background elements appears in your custom-skin - taken from the current standard-skin. The value 0 you should only use for testing purposes!


• So your [Options] section should normally look as follows:

  [Options]
  Fallback foreground = 1
  Fallback background = 1
  

Choose the fallback behaviour to the standard-skin in [Info]:
The following setting in the [Info] section affects the fallback behaviour if a main section is lacking (see 2. above)

• Version = 3 lacking sections have fallback to the same standard-skin sections which have a `Fallback version = 3` entry
  Note that also Fallback foreground/background in [Options] must be enabled therefore. Other lacking sections have the old fallback behaviour to the standard-skin - that can be a different section than the lacking; like Version = 2 before Opera 9.5.


• So your [Info] section should normally look as follows:

  [Info]
  Version = 3
  

• Version = 2 is valid too in Opera 10; then you have the old fallback behaviour to the standard-skin (before 9.5) for all lacking sections - that can be a different section than the lacking. Especially if you update an older skin or if you create a skin which have to work with Opera 10 but also older versions, you have to decide between the value 2 and 3. Note that the value 3 is ignored by Opera versions before 9.5.

In general:

• Fallback background/foreground in [Options]: enables/disables fallback to the standard-skin
• Version in [Info]: specifies the fallback behaviour to the standard-skin
• The entry `Fallback versions = 3` in the standard-skin: specifies this section as fallback for a custom-skin with Version = 3 in [Info]. The `Fallback version = 3` entry should only be in the standard-skin; there is no sense and no effect in a custom-skin!

Example for the detailed fallback info in this guide for the [Addressbar skin] section:

• If no section, Info-Version 3 and
  - Options-Fallback background 1, you see: [Addressbar skin] from standard-skin
  - Options-Fallback background 0, you see: [Window skin] from current-skin
• If no section, Info-Version 2 and
  - Options-Fallback background 1, you see: [Window skin] from current-skin
  - Options-Fallback background 0, you see: [Window skin] from current-skin

Please note that the detailed fallback info concerns always the behaviour for a custom-skin in Opera 10 - the same settings may result in another behaviour with older Opera versions!

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Fallback
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