Xojo.Core.Timer.CallLater

Shared Method

Xojo.Core.Timer.CallLater(afterMsec As Integer, method As Xojo.Core.Timer.CallNoParams)

Supported for all project types and targets.

Used to call a method (without parameters) once after the specified delay in milliseconds.

Shared Method

Xojo.Core.Timer.CallLater(afterMsec As Integer, method As Xojo.Core.Timer.CallWithArg, argument As Auto)

Supported for all project types and targets.

Used to call a method (with a parameter) once after the specified delay in milliseconds.

Notes

The method parameter is a delegate to a method that does or does not take a parameter. When passing a parameter, it must be an Auto passed as the last argument parameter.

Sample Code

Suppose you want to display some help text for a few seconds and then hide it. You can do this by creating a method to clear a Label (ClearLabel):

Sub ClearLabel
MyLabel.Value = ""
End Sub

In the initial method, you set the Label help text and then use CallLater to set it to clear it after 2 seconds:

MyLabel.Value = "Help text goes here"
Xojo.Core.Timer.CallLater(2000, AddressOf ClearLabel)

Suppose you want to display some help text for a few seconds and then replace it with different text. You can do this by creating a method that takes the text to display as a parameter (SetLabel):

Sub SetLabel(helpText As Auto)
MyLabel.Text = helpText
End Sub

In the initial method, you set up the Label help text and use CallLater to change it after 2 seconds:

MyLabel.Value = "First help text goes here"
Xojo.Core.Timer.CallLater(2000, AddressOf SetLabel, "Second help text goes here")