picker

Allows the user to pick one or multiple files from the system storage. These files can be images, videos, files or audio files. Since the picker layer itself has no visible appearance, it is usually placed inside a container layer.

Field Configurations

Key	Type	Description	Default Value
"allowCapture"	Boolean	Indicates if capturing images/videos with the camera is allowed.	true
"allowMultipleSelection"	Boolean	Indicates if multiple items can be picked. If false, previously picked items will be overridden.	false
"desiredHeight"	Number	Android only. Determines the preferred height of the image (Only with desiredWidth)	null
"desiredWidth"	Number	Android only. Determines the preferred width of the image (Only with desiredHeight)	null
"enableCrop"	Boolean	Indicates if cropping images with the camera/gallery is allowed.	true
"fileDataKey"	String	undefined	null
"fileNameKey"	String	Optional name of key to send attachment as base64 encoded String.	null
"fileTypeKey"	String	Optional type name of the key to send the mime type of the base64 encoded attachment.	null
"maxDimension"	Number	Determines the maximum edge length of the image.	null
"mediaType"	MediaType	Media type to pick.	null
"mediaTypes"	MediaType	Media types to pick, if multiple types are allowed.	null
"onPicked"	String	Event that should be fired when media was picked.	null
"previewKey"	String	OptionalKey used to send video preview images.	null
"progressBarBackground"	Color	The background color of the progress bar when a video is reduced in size.	null
"progressBarColor"	Color	The color of the progress bar when a video is reduced in size.	null
"quality"	Quality	Determines the desired quality of a video.	null

Inherited

From Form Layer

Form Layer

Field Configurations

Key	Type	Description	Default Value
"form"	String	Name of the form e.g. used to access the value of the form outside of its view.	null
"formDataKey"	String	Datakey used to access the value of the form layer.	null
"onChanged"	Array	Actions to execute when the form value is changed.	null
"settingsDataKey"	String	If set, the value of the form layer will be written into the _settings table. DEPRECATED Use onChanged to save values in the database.	null
"validationErrorMessage"	String	Message to display in case the input is invalid.	null
"validationExpression"	String	Regex to use in the validateForm action.	null
"valueActionIndex"	String	Index of the value action.	null
"valueActions"	Array	Actions to be executed when a specified value is set e.g. hiding a layer when a checkbox is selected.	null

From Base Layer

Base Layer

Field Configurations

Key	Type	Description	Default Value
"_value"	Value	[PREVIEW] Dynamic value of the layer.	null
"accessibilityAppendState"	String	Defines this layer appends its state to the accessibility text.	null
"accessibilityText"	String	Text for accessibility navigation. Can be translated.	null
"actions"	ActionList	List of actions, which will be executed when the layer is tapped.	null
"borderColor"	Color	The color of the border in hex color value.	null
"borderRadius"	UnitSize	The radius applies to all corners; with a borderWidth of 0 the border is not drawn and radius is set anyway.	0
"borderWidth"	UnitSize	The width of the border.	0
"bottomLeftRadius"	UnitSize	Radius for the bottom left corner.	0
"bottomRightRadius"	UnitSize	Radius for the bottom right corner.	0
"classes"	Array	List of classes for layer styles.	null
"conditions"	Conditions	List of conditions to alter the layer state.	null
"constraints"	Constraints	A list of constraints defining the position of the layer in a layout.	null
"consumesKeyboard"	Boolean	This layer will be used to shrink, if a keyboard is shown.	null
"dataKey"	String	Name for assigning data to this layer.	null
"focusColor"	Color	The highlight color of this layer when it is focused. Mainly used on TV. If no color is provided, the pressedColor will be used.	null
"hidden"	Boolean	Indicates whether the layer is hidden. Default: false.	false
"isAccessibilityElement"	String	Defines if this layer is important for accessibility navigation. The default depends on the layer type.	null
"layerRotation"	Number	The layer is rotated by the specified degree.	0
"name"	String	Unique name in the layout. Used for alignment or actions.	null
"opacity"	Number	The opacity of the layer.	1
"overInsetBottom"	Boolean	Determines if this layer ignores the save space at the bottom of the device.	false
"overInsetTop"	Boolean	Determines if this layer ignores the save space at the top of the device.	false
"pressedColor"	Color	The highlight color of this layer when it is pressed. Mainly used on TV. If no color is provided, the focusColor will be used.	null
"safeArea"	SafeAreaTypeObject	Determines the safe area behaviour.	null
"shadowElevation"	Number	The elevation of this layer for casting shadows.	0
"state"	String	The state the layer will use as default.	"default"
"states"	LayerStates	A list of named states that affect the appearance of the layer.	null
"topLeftRadius"	UnitSize	Radius for the top left corner.	0
"topRightRadius"	UnitSize	Radius for the top right corner.	0
"touchFeedback"	TouchFeedback	Determines if the layer should show a touch feedback if touched.	"visible"
"trackingKey"	String	Defines a key for a scroll event.	null
"type"	LayerType	The type of the layer	null
"value"	Value	(Initial) value of the layer.	null

Examples

Example 1: Creating a picker supporting multiple images

Goal: Create a picker that allows the user to pick multiple images.

To achieve this the following code can be used:

{
  "type": "container",
  "borderRadius": "25pt",
  "borderWidth": "1pt",
  "borderColor": "f3f3f3",
  "constraints": [
    {
      "type": "pos",
      "x": "50%",
      "y": "35%",
      "anchor": "c"
    },
    {
      "type": "size",
      "height": "60pt",
      "width": "200pt"
    }
  ],
  "children": [
    {
      "type": "color",
      "value": "#34a7c9",
      "classes": [
        "fullSize"
      ]
    },
    {
      "type": "text",
      "value": "Pick images",
      "fontSize": "20pt",
      "scaleType": "alignCenter",
      "classes": [
        "fullSize"
      ]
    },
    {
      "type": "picker",
      "mediaType": "image",
      "allowMultipleSelection": true,
      "classes": [
        "fullSize"
      ]
    }
  ]
}

The mediaType field of the picker layer defines what type of files can be picked. The purpose of the container layer in this example is to viusalize the picker layer.

Result:

A picker has been created.