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Code Issues Releases Wiki Activity

add explanation on 'set' attribute

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Attempted a fix for the problem I raised in #2038, by adding an explanation of why a TextReference in a button widget's 'set' attribute will lack the curly braces seen nearly anywhere else a TextReference is used as a widget attribute.
This commit is contained in:
afeldspar 2015-10-20 21:15:58 -04:00
parent 9f954ce55d
commit 7492086f31
1 changed files with 11 additions and 1 deletions
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12
editions/tw5.com/tiddlers/widgets/ButtonWidget.tid
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@ -37,4 +37,14 @@ The content of the `<$button>` widget is displayed within the button.
|tag |An optional html tag to use instead of the default "button" |
|default |Default value if `set` tiddler is missing for testing against `setTo` to determine `selectedClass` |
''Tip:'' Set ''class'' to `tc-btn-invisible tc-tiddlylink` to have a button look like an internal link.
''Note:'' In almost all other cases where a TextReference is used as a widget attribute, it will be placed between curly brackets, to [[transclude|Transclusion in WikiText]] the value currently stored there. However, when we use a TextReference as the value of a button widget's `set` attribute, we are referencing //the storage location itself//, rather than the value stored there, so we do ''not'' use curly brackets there. //Example:// we could code a button widget that sets the `caption` field of TiddlerA to be the same as that of TiddlerB as:
```
<$button set="TiddlerA!!caption" setTo={{TiddlerB!!caption}} >
Press me!
</$button>
```
''Tip:'' Set ''class'' to `tc-btn-invisible tc-tiddlylink` to have a button look like an internal link.