Class default

A helper class to handle navigation through a grid of elements that can scroll vertically Needs to be used by a UiHandler How to use:

in UiHandler.setup: Initialize with the UiHandler that handles the grid, the number of rows and columns that can be shown at once, an optional ScrollBar, and optional callbacks that will get called after scrolling
in UiHandler.show: Set setTotalElements to the total number of elements in the list to display
in UiHandler.processInput: call processNavigationInput to have it handle the cursor updates while calling the defined callbacks
in UiHandler.clear: call reset

Index

Constructors

Methods

getItemOffset processInput reset setTotalElements withScrollBar withUpdateGridCallBack withUpdateSingleElementCallback

Constructors

constructor

new default(handler, rows, columns): default
Parameters
- handler: default
- rows: number
  the maximum number of rows shown at once
- columns: number
  the maximum number of columns shown at once
Returns default
- Defined in src/ui/scrollable-grid-handler.ts:37

Methods

getItemOffset

getItemOffset(): number
Returns number
how many elements are hidden due to scrolling
- Defined in src/ui/scrollable-grid-handler.ts:91

processInput

processInput(button): boolean
Update the cursor and scrollCursor based on user input
Parameters
- button: Button
  the button that was pressed
Returns boolean
true if either the cursor or scrollCursor was updated
- Defined in src/ui/scrollable-grid-handler.ts:100

reset

reset(): void
Reset the scrolling

Returns void
- Defined in src/ui/scrollable-grid-handler.ts:158

setTotalElements

setTotalElements(totalElements): void
Parameters
- totalElements: number
  the total number of elements that the grid needs to display
Returns void
- Defined in src/ui/scrollable-grid-handler.ts:80

withScrollBar

withScrollBar(scrollBar): default
Set a scrollBar to get updated with the scrolling
Parameters
- scrollBar: ScrollBar
  ScrollBar
Returns default
this
- Defined in src/ui/scrollable-grid-handler.ts:51

withUpdateGridCallBack

withUpdateGridCallBack(callback): default
Set function that will get called if the whole grid needs to get updated
Parameters
- callback: UpdateGridCallbackFunction
  UpdateGridCallbackFunction
Returns default
this
- Defined in src/ui/scrollable-grid-handler.ts:62

withUpdateSingleElementCallback

withUpdateSingleElementCallback(callback): default
Set function that will get called if a single element in the grid needs to get updated
Parameters
- callback: UpdateDetailsCallbackFunction
  UpdateDetailsCallbackFunction
Returns default
this
- Defined in src/ui/scrollable-grid-handler.ts:72