Screen

When building apps on Thunkable, Screens function like blank pages in a book. They allow you to display different components and information.

Understanding Screen Blocks 
when Screen1 Starts
Event
Description
Starts
Fires when the Screen is first opened
when Screen1 Opens
Event
Description
Opens
Fires anytime the Screen is opened
when Screen1 BackButtonPressed
Event
Description
BackButtonPressed
Fires when the physical or on-screen back button is pressed. (Android only)
in Screen1 call ToggleDrawerMenu
Function
Description
ToggleDrawerMenu
Opens or Closes the drawer menu, if available. Must be used in conjunction with the Drawer Navigator​
Space elements horizontally
The Horizontal Alignment property allows you to space elements in a Screen horizontally
Space elements vertically
The Vertical Alignment property allows you to space elements in a Screen vertically
Add a background color or picture
Property
Description
Background Color
Default (none). Select any color using the color picker, RGBA or HEX value
Background Picture
You can upload a background image to your app or reference an image url e.g.beaver-yellow.png
Background Picture Resize Mode
This determines how to resize the image when the frame doesn't match the raw image dimensions.
Cover: Fills the entire screen without changing the height and width ratio of the image
Contain: The entire image will be scaled down to fit inside the screen, without changing the height and width ratio of the image
Stretch: The image's height will change to fill the screen length-wise
Repeat: Repeat the image to cover the screen. The image's height and width ratio
 will not change
Center: Positions the image in the middle of the frame
Enable scrolling
Property
Description
Scrollable
Default (false). Indicates whether the screen is scrollable. For scrollable to work, you must also set your screen height to fit contents and the components in your screen must have heights set in absolute pixels
Hide (or show) status bar
Property
Description
Show Status Bar
Default (true). If set to false, hides the top status bar
Set orientation
Property
Description
Screen Orientation
Default (all). You can fix the screen orientation to portrait and landscape
​

Drawer Navigator

Row

Last updated 4 months ago

Event	Description
Starts	Fires when the Screen is first opened

Event	Description
BackButtonPressed	Fires when the physical or on-screen back button is pressed. (Android only)

Function	Description
ToggleDrawerMenu	Opens or Closes the drawer menu, if available. Must be used in conjunction with the Drawer Navigator

Property	Description
Background Color	Default (`none`). Select any color using the color picker, RGBA or HEX value
Background Picture	You can upload a background image to your app or reference an image url e.g.`beaver-yellow.png`

Property	Description
Scrollable	Default (`false`). Indicates whether the screen is scrollable. For scrollable to work, you must also set your screen height to `fit contents` and the components in your screen must have heights set in `absolute` pixels

Property	Description
Show Status Bar	Default (`true`). If set to `false`, hides the top status bar

Property	Description
Screen Orientation	Default (`all`). You can fix the screen orientation to `portrait` and `landscape`