PanelStack Events

onDrop

Assignment of the action to be executed when the user moves an entry or multiple entries in the PanelStack by means of drag & drop.

Parameter Name	Type	Description
`ID`	`STRING`	Standard Parameters
`CONTEXT_ELEMENT`	`IF_WD_CONTEXT_ELEMENT`	Standard Parameters
`DATA`	`STRING`	Textual representation of data transported to the `DropTarget`. Along with `mimeType`, this property forms a link to resources. `DATA` is the value of the `DragSourceInfo.data` property of the UI element dropped on the `PanelStack`.
`MIME_TYPE`	`STRING`	Type of resource. Note Note that this property is not currently used; it is intended for future developments. End of the note.
`OFFSET`	`I`	Position where the data is dropped: `–1` means über the entry `+1` means below the entry
`PANEL_ID`	`STRING`	Unique ID of the `Panel` in `PanelStack`.
`TAGS`	`STRING`	This property corresponds to flavors in the programming environment. The flavor describes the type of drag and drop description. In a drag and drop operation, you can only drop an object onto another if both have at least one common description.

onSelect

Action executed when the user selects a Panel in the PanelStack.

If you do not set an action handler for this event, the content of all Panels is sent to the browser, and each change of the selection is handled by the client. This means that the user can change the selection easier and quicker, but that that browser has to process more data.

On the other hand, if you want to use the onSelect event, a roundtrip is always triggered when the user selects a new Panel. In this case the content of the current Panel is sent to the browser. This means the user may have to wait until the clicked Panel is displayed. But the advantage is that less data is sent to the browser. In addition, with this event you can implement complex load-on-demand scenarios to improve performance, for example, by instantiating views or loading data that is actually needed.

Parameter Name	Type	Description
`ID`	`STRING`	Standard Parameters
`CONTEXT_ELEMENT`	`IF_WD_CONTEXT_ELEMENT`	Standard Parameters
`OLD_PANEL`	`STRING`	Newly selected `Panel`
`PANEL`	`STRING`	previously selected `Panel`

onToggle

Action executed when the user expands or collapses a PanelStack.

Parameter Name	Type	Description
`ID`	`STRING`	Standard Parameters
`CONTEXT_ELEMENT`	`IF_WD_CONTEXT_ELEMENT`	Standard Parameters
`EXPANDED`	`WDY_BOOLEAN`	Event parameter for the new status. The `PanelStack` is expanded for the value `true`.