Hi,
Is there a way to get notified (not polling) when any mouse button/modifier key goes up/down?
I was trying to put together a Morph (like the Mouse button indicator in the Orange Book) that tracks up/down status of mouse buttons and modifier keys in real time. I got stuck because all existing usage of Sensor is based on polling while I would rather get notified on changes.
I tried stepping the following code every 175 ms:
self color: Color lightGray. #(red yellow blue) do: [ :c | (Sensor perform: (c , 'Pressed') asSymbol) ifTrue: [ self color: (Color perform: c) ] ].
There must be better way, TIA .. Subbu
On May 24, 2007, at 16:34 , subbukk wrote:
Hi,
Is there a way to get notified (not polling) when any mouse button/ modifier key goes up/down?
I was trying to put together a Morph (like the Mouse button indicator in the Orange Book) that tracks up/down status of mouse buttons and modifier keys in real time. I got stuck because all existing usage of Sensor is based on polling while I would rather get notified on changes.
You should never use Sensor in Morphic, this is from MVC days.
Use Morphic events: http://wiki.squeak.org/squeak/2477
- Bert -
Have you looked at:
HandMorph showEvents: true
found at:
http://wiki.squeak.org/squeak/2332
On 5/24/07, Bert Freudenberg bert@freudenbergs.de wrote:
On May 24, 2007, at 16:34 , subbukk wrote:
Hi,
Is there a way to get notified (not polling) when any mouse button/ modifier key goes up/down?
I was trying to put together a Morph (like the Mouse button indicator in the Orange Book) that tracks up/down status of mouse buttons and modifier keys in real time. I got stuck because all existing usage of Sensor is based on polling while I would rather get notified on changes.
You should never use Sensor in Morphic, this is from MVC days.
Use Morphic events: http://wiki.squeak.org/squeak/2477
- Bert -
On Thursday 24 May 2007 9:01 pm, David Mitchell wrote:
Have you looked at:
HandMorph showEvents: true
Thanks. I noticed that HandMorph maintains a collection of listeners who get notified on all events. I suppose I can:
ActiveHand addEventListener: self and ActiveHand removeEventListener: self
to turn listening on and off and then define
ButtonMorph>>handleListenEvent: evt "process events here"
BTW, EventStats and ShowEvents could have been implemented as listeners instead of hacking into the handler itself. Any reason why they were done that way?
Regards .. Subbu
On Thursday 24 May 2007 9:49 pm, subbukk wrote:
ButtonMorph>>handleListenEvent: evt "process events here"
BTW, EventStats and ShowEvents could have been implemented as listeners instead of hacking into the handler itself. Any reason why they were done that way?
Well, I tried to adapt SimpleSwitchMorph by adding handleEvent:
SimpleSwitchMorph>>handleEvent: anEvent | modifier | modifier := ' '. anEvent anyModifierKeyPressed ifTrue: [ anEvent commandKeyPressed ifTrue: [ modifier := 'Alt' ]. anEvent controlKeyPressed ifTrue: [ modifier := modifier, ' Ctrl' ]. anEvent shiftPressed ifTrue: [ modifier := modifier, ' Shift' ]. ]. self label: modifier.
I was able to pick a sample instance of this morph and place it in the world. But after the first halo click, all morphs stopped responding to mouse events :-o. Alt-. shows the system stuck in processEvents. Without Morphic responses, I am unable to debug further. Appending a "super handleEvent: evt" in the end of this method doesn't solve the problem.
Any help is appreciated .. Subbu
On Thursday 24 May 2007 8:07 pm, Bert Freudenberg wrote:
You should never use Sensor in Morphic, this is from MVC days.
Use Morphic events: http://wiki.squeak.org/squeak/2477
I tried the on:send:to: method, but the events get sent only when the cursor is over the Morph. The button should be able to reflect the status of button presses anywhere in World.
Regards .. Subbu
On May 24, 2007, at 17:58 , subbukk wrote:
On Thursday 24 May 2007 8:07 pm, Bert Freudenberg wrote:
You should never use Sensor in Morphic, this is from MVC days.
Use Morphic events: http://wiki.squeak.org/squeak/2477
I tried the on:send:to: method, but the events get sent only when the cursor is over the Morph. The button should be able to reflect the status of button presses anywhere in World.
See addEventListener:
- Bert -
squeak-dev@lists.squeakfoundation.org
-
Bert Freudenberg -
David Mitchell -
subbukk