author | convert-repo |
Sat, 11 Feb 2017 04:41:47 +0000 | |
changeset 3880 | c4269847c0fe |
parent 3379 | 6e587b73a3ca |
permissions | -rw-r--r-- |
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COPYRIGHT (c) 2014 by Claus Gittinger |
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All Rights Reserved |
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This software is furnished under a license and may be used |
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only in accordance with the terms of that license and with the |
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inclusion of the above copyright notice. This software may not |
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be provided or otherwise made available to, or used by, any |
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other person. No title to or ownership of the software is |
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hereby transferred. |
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" |
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"{ Package: 'stx:libview2' }" |
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EventListener subclass:#PluggableEventListener |
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instanceVariableNames:'keyPressAction keyReleaseAction' |
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classVariableNames:'' |
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poolDictionaries:'' |
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category:'Interface-Support-UI' |
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! |
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!PluggableEventListener class methodsFor:'documentation'! |
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copyright |
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" |
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COPYRIGHT (c) 2014 by Claus Gittinger |
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All Rights Reserved |
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This software is furnished under a license and may be used |
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only in accordance with the terms of that license and with the |
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inclusion of the above copyright notice. This software may not |
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be provided or otherwise made available to, or used by, any |
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other person. No title to or ownership of the software is |
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hereby transferred. |
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" |
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! |
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documentation |
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" |
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a preliminary version of a pluggable event listener. |
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can be configured via handler blocks. |
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[see also:] |
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WindowSensor WindowEvent WindowGroup |
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[author:] |
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Claus Gittinger |
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" |
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! |
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example |
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" |
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class: PluggableEventListener
Claus Gittinger <cg@exept.de>
parents:
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to eat a particular key from another view: |
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|v e| |
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v := StandardSystemView extent:300@200. |
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v add:(e := EditTextView origin:0.0@0.0 corner:1.0@1.0). |
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v label:'key a is ignored'. |
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v openAndWait. |
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e sensor addEventListener:( |
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PluggableEventListener new |
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keyPressAction:[:event | |
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event key == $a ifTrue:[ |
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Transcript showCR:'a key eaten'. |
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true. |
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] ifFalse:[ |
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6e587b73a3ca
class: PluggableEventListener
Claus Gittinger <cg@exept.de>
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Transcript showCR:'other key ok:',event key printString. |
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false |
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] |
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]). |
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class: PluggableEventListener
Claus Gittinger <cg@exept.de>
parents:
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class: PluggableEventListener
Claus Gittinger <cg@exept.de>
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to get events for a hotKey (attention: synchronous, |
6e587b73a3ca
class: PluggableEventListener
Claus Gittinger <cg@exept.de>
parents:
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so you better enqueue the event into an application's private queue |
6e587b73a3ca
class: PluggableEventListener
Claus Gittinger <cg@exept.de>
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in the handler block) |
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class: PluggableEventListener
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class: PluggableEventListener
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Display rootView |
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class: PluggableEventListener
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addHotKeyHandler:( |
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class: PluggableEventListener
Claus Gittinger <cg@exept.de>
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PluggableEventListener new |
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class: PluggableEventListener
Claus Gittinger <cg@exept.de>
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keyPressAction:[:event | |
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class: PluggableEventListener
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Transcript showCR:event. |
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class: PluggableEventListener
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event key = 'F2' ifTrue:[ |
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class: PluggableEventListener
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Transcript showCR:'F2 pressed'. |
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class: PluggableEventListener
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true. |
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class: PluggableEventListener
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] ifFalse:[ |
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class: PluggableEventListener
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Transcript showCR:'other key ok:',event key printString. |
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class: PluggableEventListener
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false |
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class: PluggableEventListener
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] |
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class: PluggableEventListener
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]) |
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class: PluggableEventListener
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forKey:'F2' |
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modifierMask:nil |
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" |
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! ! |
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!PluggableEventListener methodsFor:'accessing'! |
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keyPressAction:aBlock |
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"install a block as handler for keyPress events. |
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the block will get the windowEvent as argument, |
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and is supposed to return true if it handled the event, |
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false if not (so the event is processed as usual)." |
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keyPressAction := aBlock. |
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! |
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keyReleaseAction:aBlock |
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"install a block as handler for keyRelease events. |
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the block will get the windowEvent as argument, |
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and is supposed to return true if it handled the event, |
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false if not (so the event is processed as usual)." |
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keyReleaseAction := aBlock. |
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! ! |
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!PluggableEventListener methodsFor:'event processing'! |
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processEvent:anEvent |
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"process an event; if true is returned, the event is considered to be |
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'eaten' by the listener, and not passed to the view. |
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If false is returned, the event is processed as usual. |
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Here, the event is dispatched into one of the button*/key* etc. methods" |
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|handler| |
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anEvent isKeyPressEvent ifTrue:[ |
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handler := keyPressAction |
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] ifFalse:[ |
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anEvent isKeyReleaseEvent ifTrue:[ |
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handler := keyReleaseAction |
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] |
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]. |
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handler notNil ifTrue:[ |
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^ handler value:anEvent |
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]. |
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^ false |
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! ! |
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!PluggableEventListener class methodsFor:'documentation'! |
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version |
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class: PluggableEventListener
Claus Gittinger <cg@exept.de>
parents:
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^ '$Header: /cvs/stx/stx/libview2/PluggableEventListener.st,v 1.2 2014-09-23 11:36:30 cg Exp $' |
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! |
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version_CVS |
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class: PluggableEventListener
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^ '$Header: /cvs/stx/stx/libview2/PluggableEventListener.st,v 1.2 2014-09-23 11:36:30 cg Exp $' |
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! ! |
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