Adobe AIR: Listen to the Display State Changing of the Window

It’s a useful feature to be able to know when an AIR window is minimized, maximized or restored (set to normal). Most of this code is gleaned from a much more robust script at Jeffry Houser’s blog. It’s also handy to check out Adobe’s documentation on this topic (which is far less robust). The states of interest are:

 

·         NativeWindowDisplayState.NORMAL

·         NativeWindowDisplayState.MINIMIZED

·         NativeWindowDisplayState.MAXIMIZED

 

// Create an event listener for the display state of an AIR application

stage.nativeWindow.addEventListener(NativeWindowDisplayStateEvent.DISPLAY_STATE_CHANGING, myDisplayState);

 

function myDisplayState(displayStateEvent:NativeWindowDisplayStateEvent):void {

       // if the window was previously minimized, but is  now being restored to normal

       if (displayStateEvent.afterDisplayState == NativeWindowDisplayState.NORMAL && displayStateEvent.beforeDisplayState == NativeWindowDisplayState.MINIMIZED) {

              // Code here...

       }

}