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TiddlyWiki5/editions/tw5.com/tiddlers/widgets/DraggableWidget.tid
Jeremy Ruston 62bb8affa4
Add data attribute support to button and other widgets (#7769)
* Add data attribute support to button widget

* Fix typo

* Refactor ready for making mechanism more generic

* Apply more generic implementation to multiplate widgets

* Refactor to use existing widget.assignAttributes() method

* Fix typo

* Clarify docs

* Update docs

* Update select widget to support style.* attributes

* Remove obsolete comment

* Fixes refresh issues for checkbox and links widgets for data attributes (#7846)

* fix: refresh issues with checkbox and links widgets

* fix: indenting

* Feat: add support for data attributes to Draggable and Droppable widgets (#7845)

* Docs clarification

* docs: add style and data attributes to Draggable and Droppable widget docs (#7850)

* Refactors Select widget to directly create DOM node (#7848)

* fix: refactored SelectWidget to directly create DOM nodes

* fix: refactored SelectWidget to directly create DOM nodes

* fix: improve refresh handling for select widget

* Fixes issues in the PR "Button widget data attributes" (#7852)

* fix: fixed ordered attributes handling and improved tests to catch event attributes

* fix: clean up code from testing

* fix: more tests and refactoring

* fix: use lowercase when checking for event attribute prefix

* fix: use lowercase when checking for event attribute prefix

* fix: changed comment wording

* fix: minor refactoring

* refactor: for brevity

---------

Co-authored-by: Saq Imtiaz <saq.imtiaz@gmail.com>
2023-11-22 20:05:40 +00:00

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caption: draggable
created: 20170406081938627
modified: 20231121101431149
tags: Widgets TriggeringWidgets
title: DraggableWidget
type: text/vnd.tiddlywiki
The DraggableWidget creates a DOM element that can be dragged by the user. It only works on browsers that support drag and drop, which typically means desktop browsers, but [[there are workarounds|Mobile Drag And Drop Shim Plugin]].
The draggable element can be assigned a list of tiddlers that are used as the payload.
If desired it can invoke actions when dragging starts and when it ends.
See DragAndDropMechanism for an overview.
! Content and Attributes
|!Attribute |!Description |
|tiddler |Optional title of the payload tiddler for the drag |
|filter |Optional filter defining the payload tiddlers for the drag |
|tag |Optional tag to override the default "div" element created by the widget|
|selector|<<.from-version 5.2.2>> Optional CSS Selector to identify a DOM element within the widget that will be used as the drag handle |
|class |Optional CSS classes to assign to the DOM element created by the widget. The class `tc-draggable` is added to the the DOM element created by the widget unless the <<.param selector>> attribute is used. The class `tc-dragging` is applied to the DOM element created by the widget while the element is being dragged |
|enable |<<.from-version 5.2.3>> Optional value "no" to disable the draggable functionality (defaults to "yes") |
|startactions |Optional action string that gets invoked when dragging ''starts'' |
|endactions |Optional action string that gets invoked when dragging ''ends'' |
|dragimagetype |<<.from-version "5.2.0">> Optional type of drag image: `dom` (the default) or `blank` to disable the drag image |
|data-* |<<.from-version "5.3.2">> Optional [[data attributes|https://developer.mozilla.org/en-US/docs/Learn/HTML/Howto/Use_data_attributes]] to be assigned to the HTML element |
|style.* |<<.from-version "5.3.2">> Optional [[CSS properties|https://developer.mozilla.org/en-US/docs/Web/CSS/Reference]] to be assigned to the HTML element |
Either or both of the ''tiddler'' and ''filter'' attributes must be specified in order for there to be a payload to drag.
The [[actionTiddler Variable]] is accessible in both //startactions// and //endactions//. It holds the payload tiddler(s) specified through the //tiddler// and //filter// attributes as a [[Title List]] using double square brackets to quote titles that include whitespace.
<<.tip """Note that the [[actionTiddler Variable]] holds a [[Title List]] quoted with double square brackets. This is unlike the DroppableWidget which uses the same variable to pass a single unquoted title.""">>
<<.tip """When specifying a DOM node to use as the drag handle with the <<.param selector>> attribute, give it the class `tc-draggable` in order for it to have the appropriate cursor and the attribute `draggable` with the value `true` to make it draggable.""">>
The LinkWidget incorporates the functionality of the DraggableWidget via the ''draggable'' attribute.
<<.from-version 5.2.3>> The following variables are accessible in the //startactions// and the //endactions//:
|!Variables |!Description |
|`modifier` |The [[modifier Variable]] contains the Modifier Key held while dragging |
|`dom-*` |All DOM attributes of the node being dragged are made available as variables, with the prefix `dom-` |
|`tv-popup-coords` |A relative co-ordinate string that can be used with the ActionPopupWidget to trigger a popup at the DOM node matching the selector where the event originated (see [[Coordinate Systems]] for more information) |
|`tv-popup-abs-coords` |<<.from-version "5.2.4">> An absolute co-ordinate string that can be used with the ActionPopupWidget to trigger a popup at the DOM node matching the selector where the event originated (see [[Coordinate Systems]] for more information) |
|`tv-selectednode-posx` |`x` offset position of the dragged DOM node |
|`tv-selectednode-posy` |`y` offset position of the dragged DOM node |
|`tv-selectednode-width` |`offsetWidth` of the dragged DOM node |
|`tv-selectednode-height` |`offsetHeight` of the dragged DOM node |
|`event-fromselected-posx` |`x` position of the event relative to the dragged DOM node |
|`event-fromselected-posy` |`y` position of the event relative to the dragged DOM node |
|`event-fromviewport-posx` |`x` position of the event relative to the viewport |
|`event-fromviewport-posy` |`y` position of the event relative to the viewport |