Assuming this is for a game, you would effectively prevent someone
"hammering" on a key to do some action repeatedly. Also this depends
on the actual repeat rate which varies widely between systems. In my
example there is no such fixed timeout, you simply would check if the
key is pressed already (i.e. it is in the keys set).
- Bert -
Am Mar 5, 2008 um 18:46 schrieb stan shepherd <[EMAIL PROTECTED]>:
Bert, Thanks for the reply and example.
To get around the repeat key issue, I'm testing the elapsed time
since last
keystroke. If it's too short, assume it's repeat key from the OS:
keyDelay := (anEvent timeStamp) - (lastEventTime at: noteNo) .
lastEventTime at: noteNo put: anEvent timeStamp.
(keyDelay < 250) ifTrue: [ "Transcript show: 'key repeat
ignored'; cr."
^self]. "assume it's a key repeat'"
...Stan
p.s. I'm sure there is a 'Squeakier' way to do this.
Bert Freudenberg wrote:
On Mar 4, 2008, at 19:19 , stan shepherd wrote:
handleKeyUp: anEvent
Transcript show: ' evt is down ',anEvent isKeyDown asString; cr.
"now press and hold a key"
shows
evt is down false
Which is of course expected since only keyUp events are passed into
#handleKeyUp:, so #isKeyDown always is false.
You need to handle both keyDown and keyUp events, and track the state
of pressed keys.
Note that the keyValue in up/down events is system-specific (unlike
keyStroke events which have actual characters).
Also note that this behavior also depends on your OS and VM version.
The Windows VM handles up/down events nicely for a long time, Mac VMs
since recently, Unix VMs are broken I think.
I'm attaching a small example morph demonstrating this.
- Bert -
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