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48 lines
1.7 KiB
Plaintext
48 lines
1.7 KiB
Plaintext
created: 20141008134425548
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modified: 20210630163127249
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tags: Widgets
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title: ActionWidgets
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type: text/vnd.tiddlywiki
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Action widgets are a special type of widget that have no visual appearance but perform an action when triggered (such as sending a message, navigating to a tiddler, or changing the value of a tiddler). Action widgets are used in association with other widgets that trigger those actions (for example, the ButtonWidget).
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The following action widgets are provided:
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<<list-links "[tag[ActionWidgets]]">>
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There are two ways to use action widgets:
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* Placing them within an action string attribute (typically called `actions`) on the triggering widget (this is the preferred way)
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* Embedding the actions within the triggering widget (an older technique that is now deprecated)
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!! Using action string attributes
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The action widgets are passed as a string to the `actions` attribute of the triggering widget. Usually, it is more convenient to use a macro to assign the action widgets to a variable. For example, here is a button that triggers two actions of sending different messages:
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```
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\define my-actions()
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<$action-sendmessage $message="tm-home"/>
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<$action-sendmessage $message="tm-full-screen"/>
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\end
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<$button actions=<<my-actions>>>
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Click me!
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</$button>
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```
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!! Directly embedding action widgets
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The action widgets need not be immediate children of their triggering widget, but they must be descendents of it. The actions are performed in sequence. Here is the above example rewritten to use embedding:
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```
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<$button>
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<$action-sendmessage $message="tm-home"/>
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<$action-sendmessage $message="tm-full-screen"/>
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Click me!
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</$button>
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```
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! Action Execution Modes
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{{ActionWidget Execution Modes}}
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