Notes | program | advanced | design
AlertType is a tool class and cannot be instantiated by itself. It provides several well-defined alertytpe to assist with the alert class. Includes: ALARM Alert confirmation Identify error Error info provide information warning warning
Alert uses display's setcurrent () to make it appear on the screen at the moment, it will first make a sound, and then display itself on the screen, after a period of time, automatically jump back to the previous page.
If alert is the first screen display, you must use Setcommandlistener () to set event handling, or an error message will occur.
Constructor: With one argument-the caption can take four parameters-title, text, image, type. The SetType ()/gertype () setstring ()/getstring () setimage () is the action function for the above parameters.
You can use the settimeout () function to pass in the Alert.forever as a parameter to prevent alert from automatically jumping back to its original feature over time. This must be handled manually by the user.
We can add a system menu item using AddCommand (), and if alert itself does not join any command, its static member Dismiss_command will be the only system menu item. Once we join our own Command,dismiss_command will not appear. After Removecommand () deletes the command in all alert, Dismiss_command appears again to ensure that at least one of the options on alert is available.
Setcommandlistener () is used to register the alert event. Without any incident, a little press is going back to the previous page.
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