Two and three key sequences
private var _escIsDown:Boolean=false;
private var _f1IsDown:Boolean=false;
private var _f2IsDown:Boolean=false;
private var _f4IsDown:Boolean=false;
private function
onKeyStrokeEvent(event:KeyboardEvent):void {
if(event.keyCode==Keyboard.ESCAPE) {
this._escIsDown = (event.type ==
KeyboardEvent.KEY_DOWN);
}
if(event.keyCode==Keyboard.F1) {
this._f1IsDown = (event.type ==
KeyboardEvent.KEY_DOWN);
}
if(event.keyCode==Keyboard.F2) {
this._f2IsDown = (event.type ==
KeyboardEvent.KEY_DOWN);
}
if(event.keyCode==Keyboard.F4) {
this._f4IsDown = (event.type ==
KeyboardEvent.KEY_DOWN);
}
if(this._escIsDown && this._f1IsDown &&
this._f4IsDown ){
this.panicFunction();
}
if(this._escIsDown && this._f2IsDown ){
this.callHome();
}
}
/**
* place code in this function to be executed by
client when instructed by support.
* */
private function callHome():void {
DoSomething();
trace("CALL HOME FUNCTION CALLED: ");
}
/**
* place code in this function to be executed by
client when instructed by support.
* */
private function panicFunction():void {
DoSomethingElse();
trace("PANIC FUNCTION CALLED: ");
}
From: [email protected] [mailto:[email protected]] On
Behalf Of mookie298347
Sent: Tuesday, December 16, 2008 10:47 AM
To: [email protected]
Subject: [flexcoders] Pattern for capturing multi-key/click actions?
I would like to add multi-key/click functionality to my Flex app.
There are a couple of slightly different examples of what I mean:
1. Detect when a user is holding down the 'r' key while clicking a
button.
2. Detect when a certain component has focus and the user types the
letters 'd' 's' in succession within a few seconds of each other.
I noticed there are properties in the MouseEvent class to detect
things like shift,ctrl and alt keys but I need to detect more than
just those. Additionally those properties don't exist in other event
classes like ItemClickEvent.
What I have done so far is simply create a state object at the
application level that captures all keyboard/mouse events and sets the
state of itself based on the events. Individual components can check
the current state at any time to determine which keys/mouse actions
are currently active.
I don't particularly like this implementation for many reasons and was
hoping someone knew of a pattern to use considering many applications
support such functionality (Eclipse comes to mind).
Thanks!
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