author | Claus Gittinger <cg@exept.de> |
Fri, 28 Mar 1997 20:57:22 +0100 | |
changeset 1500 | d70af951e8b4 |
parent 1395 | 7218ca27d752 |
child 1945 | 4d6391460133 |
permissions | -rw-r--r-- |
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" |
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COPYRIGHT (c) 1989 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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SimpleView subclass:#View |
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instanceVariableNames:'model aspectMsg changeMsg menuMsg menuHolder menuPerformer' |
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classVariableNames:'' |
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poolDictionaries:'' |
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category:'Views-Basic' |
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! |
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!View class methodsFor:'documentation'! |
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copyright |
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" |
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COPYRIGHT (c) 1989 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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||
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documentation |
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" |
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this class adds provisions for views which show or work on a model. |
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This functionality used to be in View, but has been extracted into SimpleView and |
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this new View class, to take some of the stuff out of views which do not need |
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this functionality (i.e. all views which do only geometry management). |
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Instances of View are seldom used, most views in the system inherit |
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from this class. |
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[Instance variables:] |
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model <nil | any> the model (if any) |
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aspectMsg <nil | Symbol> the aspect; typically |
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dependentViews react on changes |
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of this aspect and update their contents. |
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changeMsg <nil | Symbol> the changeMessage; typically |
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dependentViews send this message to |
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the model to tell it about changes. |
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menuMsg <nil | Symbol> the menuMessage; typically |
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dependentViews send this message to |
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the model to ask for a popup menu. |
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menuHolder <any> who has a menu |
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(default: nil i.e. model has menu) |
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menuPerformer <any> who performs menu actions |
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(default: nil i.e. model has menu) |
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[see also:] |
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StandardSystemView TopView DialogBox |
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WindowGroup |
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Model ValueHolder |
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( introduction to view programming :html: programming/viewintro.html ) |
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[author:] |
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Claus Gittinger |
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" |
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! |
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examples |
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a subView in a topView: |
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[exBegin] |
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|top v| |
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topView := StandardSystemView new. |
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v := View new. |
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v origin:0.25 @ 0.25 corner:0.75 @ 0.75. |
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top addSubView:v. |
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top open |
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[exEnd] |
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the same, a bit more compact: |
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[exBegin] |
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|top v| |
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topView := StandardSystemView new. |
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v := View origin:0.25 @ 0.25 corner:0.75 @ 0.75 in:topView. |
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top open |
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[exEnd] |
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! ! |
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!View class methodsFor:'instance creation'! |
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on:aModel aspect:aspectMsg |
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"st-80 style view creation: create a new view, set its model |
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and selectors for aspect" |
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^ self new |
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on:aModel |
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aspect:aspectMsg |
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! |
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on:aModel aspect:aspectMsg change:changeMsg |
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"st-80 style view creation: create a new view, set its model |
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and selectors for aspect and change" |
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^ self new |
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on:aModel |
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aspect:aspectMsg |
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change:changeMsg |
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! |
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on:aModel aspect:aspectMsg change:changeMsg menu:menuMsg |
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"st-80 style view creation: create a new view, set its model |
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and selectors for aspect, change and menu" |
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^ self new |
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on:aModel |
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aspect:aspectMsg |
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change:changeMsg |
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menu:menuMsg |
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! |
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on:aModel aspect:aspectMsg menu:menuMsg |
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"st-80 style view creation: create a new view, set its model |
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and selectors for aspect and menu" |
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^ self new |
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on:aModel |
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aspect:aspectMsg |
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menu:menuMsg |
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! ! |
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!View class methodsFor:'defaults'! |
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defaultAspectMessage |
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"subclasses which by default do NOT want to be informed about changed |
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models should redefine this to return nil" |
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^ #value |
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! |
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defaultChangeMessage |
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"subclasses which by default do NOT want to inform the model |
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should redefine this to return nil" |
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^ #value: |
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! |
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defaultMenuMessage |
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"subclasses which by default do NOT want to send menu messages |
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should return nil" |
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^ nil |
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"Created: 3.1.1997 / 01:50:36 / stefan" |
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! ! |
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!View methodsFor:'accessing-channels'! |
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setupChannel:newChannel for:changeSelector withOld:oldChannel |
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"common code to change a channel" |
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|oldValue| |
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oldChannel notNil ifTrue:[ |
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oldChannel retractInterestsFor:self. |
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oldValue := oldChannel value. |
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]. |
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newChannel notNil ifTrue:[ |
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newChannel onChangeSend:changeSelector to:self. |
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]. |
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self perform:changeSelector. |
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^ newChannel |
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"Modified: 28.3.1997 / 20:42:01 / cg" |
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! ! |
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!View methodsFor:'accessing-menus'! |
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menuHolder |
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"who has the menu ? |
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If no explicit menuHolder was defined, its the model if I have one. |
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Otherwise, its the menuHolder (if nonNil) or mySelf. |
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The menuHolder is supposed to return a popUpMenu when asked via the |
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menuMessage." |
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menuHolder notNil ifTrue:[^ menuHolder]. |
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model notNil ifTrue:[^ model]. |
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^ self |
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"Modified: 23.12.1996 / 13:56:55 / cg" |
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! |
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menuHolder:anObject |
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"change the one that provides the menu (via menuMsg)." |
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menuHolder := anObject |
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"Created: 23.12.1996 / 13:54:33 / cg" |
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! |
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menuMessage |
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"Return the symbol sent to the model to aquire the menu" |
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^ menuMsg |
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! |
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menuMessage:aSymbol |
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"ST-80 style menus: If a views menuSymbol is nonNil, it |
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will send it to its model when the middleButton is pressed. |
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That method should return nil or the menu to be shown. |
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This is useful for very dynamic menus, where it does not |
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make sense to define an initial menu. |
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This is the same as #menu: which was added for ST-80 compatibility." |
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menuMsg := aSymbol |
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! |
232 |
||
233 |
menuPerformer |
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234 |
"who should perform the menu actions ? |
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If no menuPerformer was defined, its the model if I have one. |
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Otherwise its the menuPerformer (if nonNil), or myself. |
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The menuPerformer get messages from the menu" |
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menuPerformer notNil ifTrue:[^ menuPerformer]. |
269 | 240 |
model notNil ifTrue:[^ model]. |
241 |
^ self |
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"Modified: 23.12.1996 / 13:57:18 / cg" |
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! |
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menuPerformer:anObject |
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"change the one that does the menu actions. |
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See the comment in SimpleView>>activateMenu on who gets the menus |
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message." |
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|
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menuPerformer := anObject |
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" |
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|top textV plug| |
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plug := Plug new. |
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plug respondTo:#textMenu |
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with:[ |m| |
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|
259 |
m := PopUpMenu |
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260 |
labels:#('copy' 'foo' '-' 'others') |
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261 |
selectors:#(copySelection foo nil others). |
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262 |
m subMenuAt:#others |
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|
263 |
put:(PopUpMenu |
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|
264 |
labels:#('bar' 'goto') |
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265 |
selectors:#(bar gotoLine)) |
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|
266 |
]. |
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|
267 |
|
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|
268 |
top := StandardSystemView new. |
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|
269 |
top extent:300@300. |
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270 |
|
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271 |
textV := TextView origin:0.0@0.0 corner:1.0@1.0 in:top. |
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272 |
textV menuHolder:plug; menuMessage:#textMenu; menuPerformer:plug. |
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|
273 |
textV contents:'hello world'. |
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274 |
top open. |
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275 |
" |
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276 |
|
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277 |
"Created: 23.12.1996 / 13:57:28 / cg" |
269 | 278 |
! ! |
279 |
||
118 | 280 |
!View methodsFor:'accessing-mvc'! |
281 |
||
269 | 282 |
addModelInterfaceTo:aDictionary |
283 |
"this adds entries for all messages sent to my model |
|
284 |
to aDictionary" |
|
285 |
||
286 |
aDictionary at:#aspectMessage put:aspectMsg. |
|
287 |
aDictionary at:#changeMessage put:changeMsg. |
|
288 |
aDictionary at:#menuMessage put:menuMsg. |
|
289 |
||
290 |
" |
|
291 |
Button new modelInterface |
|
292 |
" |
|
293 |
! |
|
135 | 294 |
|
269 | 295 |
aspect |
296 |
"Return the aspect used with changes from/to the model" |
|
297 |
||
298 |
^ aspectMsg |
|
299 |
! |
|
300 |
||
301 |
aspectMessage |
|
302 |
"Return the aspect used with changes from/to the model" |
|
303 |
||
304 |
^ aspectMsg |
|
305 |
! |
|
306 |
||
307 |
aspectMessage:aspectSymbol |
|
308 |
"ST-80 style updating: If a views aspectSymbol is nonNil, |
|
309 |
it will respond to changes of this aspect from the model." |
|
310 |
||
311 |
aspectMsg := aspectSymbol |
|
135 | 312 |
! |
313 |
||
269 | 314 |
change:changeSymbol |
315 |
"ST-80 style change notification: If a views changeSymbol is nonNil, |
|
316 |
it will send it to its model when something changes. |
|
317 |
Alias for changeMessage: for ST-80 compatibility." |
|
318 |
||
319 |
self changeMessage:changeSymbol |
|
320 |
! |
|
321 |
||
322 |
changeMessage |
|
323 |
"Return the symbol sent to the model if nonNil when something changes." |
|
135 | 324 |
|
269 | 325 |
^ changeMsg |
326 |
! |
|
327 |
||
328 |
changeMessage:aSymbol |
|
329 |
"ST-80 style change notification: If a views changeSymbol is nonNil, |
|
330 |
it will send it to its model when something changes. |
|
331 |
This is the same as change: which was added for ST-80 compatibility." |
|
332 |
||
333 |
changeMsg := aSymbol |
|
334 |
! |
|
335 |
||
336 |
controller:aController |
|
337 |
"set the controller" |
|
118 | 338 |
|
269 | 339 |
super controller:aController. |
340 |
controller notNil ifTrue:[ |
|
341 |
controller model:model |
|
0 | 342 |
] |
343 |
! |
|
344 |
||
269 | 345 |
menu:menuSymbol |
346 |
"ST-80 style menus: If a views menuSymbol is nonNil, it |
|
347 |
will send it to its model when the middleButton is pressed. |
|
348 |
That method should return nil or the menu to be shown. |
|
349 |
This is useful for very dynamic menus, where it does not |
|
350 |
make sense to define an initial menu. |
|
351 |
Alias for #menuMessage:, for ST-80 compatibility." |
|
352 |
||
353 |
menuMsg := menuSymbol |
|
354 |
! |
|
355 |
||
118 | 356 |
model |
357 |
"return the model, for non-MVC views, |
|
358 |
this is nil or the receiver" |
|
359 |
||
360 |
^ model |
|
361 |
! |
|
362 |
||
363 |
model:aModel |
|
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364 |
"Set the model. |
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365 |
Here, if I am my own menuPerformer/menuHolder, |
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366 |
set the menuHolder and menuPerformer to the model. |
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|
367 |
This is a compatibility kludge, |
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|
368 |
since typically, ST-80 code expects the model to provide a menu |
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369 |
and perform it. If the model does not support a menu message, |
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370 |
it will be forwarded to the view. |
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371 |
Those apps which want the view to provide the (default) menu have to reset |
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|
372 |
this by sending #menuHolder: message (again)" |
118 | 373 |
|
374 |
model notNil ifTrue:[ |
|
1149
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|
375 |
model removeDependent:self |
89 | 376 |
]. |
118 | 377 |
model := aModel. |
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378 |
(menuPerformer == self and:[menuHolder == self]) ifTrue:[ |
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|
379 |
menuPerformer := menuHolder := model |
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|
380 |
]. |
118 | 381 |
model notNil ifTrue:[ |
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|
382 |
aModel addDependent:self |
118 | 383 |
]. |
384 |
controller notNil ifTrue:[ |
|
1149
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|
385 |
controller model:aModel |
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|
386 |
]. |
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|
387 |
|
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|
388 |
"Modified: 28.2.1997 / 19:23:06 / cg" |
118 | 389 |
! |
390 |
||
140 | 391 |
modelInterface |
392 |
"this returns a dictionary of messages sent to my model. |
|
393 |
It can be used for builders and wrappers to get information |
|
394 |
about the messages sent to my model. |
|
395 |
The returned dictionary contains one entry for each get-Msg, |
|
396 |
and the recevier will implement corresponding messages (with a colon) |
|
397 |
to set the message symbol." |
|
398 |
||
399 |
|d| |
|
400 |
||
401 |
d := IdentityDictionary new. |
|
402 |
self addModelInterfaceTo:d. |
|
403 |
^ d |
|
404 |
||
405 |
" |
|
406 |
Button new modelInterface |
|
407 |
Label new modelInterface |
|
408 |
" |
|
409 |
||
410 |
" |
|
411 |
does the view support setting the menuMessage ? |
|
412 |
||
413 |
SelectionInListView new modelInterface includesKey:#menuMessage |
|
414 |
" |
|
415 |
||
416 |
" |
|
417 |
turn off all interaction to the model: |
|
418 |
||
419 |
|m v if| |
|
420 |
||
421 |
m := SelectionInList new. |
|
422 |
m list:#('one' 'two' 'tree' 'four') asValue. |
|
423 |
m selection:1 asValue. |
|
424 |
v := SelectionInListView on:m. |
|
425 |
v open. |
|
426 |
v inspect. |
|
427 |
||
428 |
if := v modelInterface. |
|
429 |
if inspect. |
|
430 |
||
431 |
if keysAndValuesDo:[:what :msg | |
|
432 |
v perform:(what , ':') asSymbol with:nil. |
|
433 |
]. |
|
434 |
" |
|
269 | 435 |
! |
436 |
||
437 |
on:aModel aspect:aspectSymbol |
|
438 |
"ST-80 compatibility: set model and aspect |
|
439 |
messages - needs a view which uses these" |
|
440 |
||
441 |
aspectMsg := aspectSymbol. |
|
442 |
self model:aModel. |
|
443 |
! |
|
444 |
||
445 |
on:aModel aspect:aspectSymbol change:changeSymbol |
|
446 |
"ST-80 compatibility: set model, aspect and change |
|
447 |
messages - needs a view which uses these" |
|
448 |
||
449 |
aspectMsg := aspectSymbol. |
|
450 |
changeMsg := changeSymbol. |
|
451 |
self model:aModel. |
|
452 |
! |
|
453 |
||
454 |
on:aModel aspect:aspectSymbol change:changeSymbol menu:menuSymbol |
|
455 |
"ST-80 compatibility: set model, aspect, change and menu |
|
456 |
messages - needs a view which uses these" |
|
457 |
||
458 |
aspectMsg := aspectSymbol. |
|
459 |
changeMsg := changeSymbol. |
|
460 |
menuMsg := menuSymbol. |
|
461 |
self model:aModel. |
|
462 |
! |
|
463 |
||
464 |
on:aModel aspect:aspectSymbol menu:menuSymbol |
|
465 |
"ST-80 compatibility: set model, aspect and menu |
|
466 |
messages - needs a view which uses these" |
|
467 |
||
468 |
aspectMsg := aspectSymbol. |
|
469 |
menuMsg := menuSymbol. |
|
470 |
self model:aModel. |
|
471 |
! |
|
472 |
||
473 |
sendChangeMessage:aSelector with:arg |
|
474 |
"tell the model about a change" |
|
475 |
||
476 |
|n selector| |
|
477 |
||
478 |
"/ |
|
479 |
"/ MVC way of doing it: |
|
480 |
"/ if the model is a block, evaluate it, optionally |
|
481 |
"/ passing the arg and the receiver as arguments. |
|
482 |
"/ |
|
483 |
"/ otherwise (the common case) send it a changeMsg message |
|
484 |
"/ also with arg and the receiver (depending on the number of arguments |
|
485 |
"/ as defined by the selector). |
|
486 |
"/ |
|
487 |
(model notNil and:[aSelector notNil]) ifTrue:[ |
|
488 |
n := aSelector numArgs. |
|
489 |
model isBlock ifTrue:[ |
|
490 |
n := model numArgs. |
|
491 |
n == 0 ifTrue:[ |
|
492 |
selector := #value |
|
493 |
] ifFalse:[ |
|
494 |
n == 1 ifTrue:[ |
|
495 |
selector := #value: |
|
496 |
] ifFalse:[ |
|
497 |
selector := #value:value: |
|
498 |
] |
|
499 |
] |
|
500 |
] ifFalse:[ |
|
501 |
selector := aSelector |
|
502 |
]. |
|
503 |
n == 0 ifTrue:[ |
|
504 |
model perform:selector |
|
505 |
] ifFalse:[ |
|
506 |
n == 1 ifTrue:[ |
|
507 |
model perform:selector with:arg |
|
508 |
] ifFalse:[ |
|
509 |
model perform:selector with:arg with:self |
|
510 |
] |
|
511 |
] |
|
512 |
] |
|
513 |
! |
|
514 |
||
515 |
sendChangeMessageWith:arg |
|
516 |
"tell the model about a change" |
|
517 |
||
518 |
self sendChangeMessage:changeMsg with:arg |
|
72 | 519 |
! ! |
520 |
||
269 | 521 |
!View methodsFor:'drawing'! |
118 | 522 |
|
269 | 523 |
redraw |
524 |
"redraw myself |
|
525 |
if there is a model, this one shall redraw itself, |
|
526 |
otherwise we cannot do much here - has to be redefined in subclasses" |
|
118 | 527 |
|
269 | 528 |
model notNil ifTrue:[ |
529 |
model update:self |
|
530 |
] |
|
118 | 531 |
! ! |
532 |
||
533 |
!View methodsFor:'initialization'! |
|
534 |
||
535 |
initialize |
|
536 |
super initialize. |
|
140 | 537 |
|
538 |
aspectMsg := self class defaultAspectMessage. |
|
539 |
changeMsg := self class defaultChangeMessage. |
|
1151
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Move rest of menuHolder/menuPerformer stuff to view.
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changeset
|
540 |
menuMsg := self class defaultMenuMessage. |
1a3682212ea9
Move rest of menuHolder/menuPerformer stuff to view.
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diff
changeset
|
541 |
|
135 | 542 |
model notNil ifTrue:[ |
1151
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diff
changeset
|
543 |
controller notNil ifTrue:[ |
1a3682212ea9
Move rest of menuHolder/menuPerformer stuff to view.
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parents:
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diff
changeset
|
544 |
controller model:model |
1a3682212ea9
Move rest of menuHolder/menuPerformer stuff to view.
Stefan Vogel <sv@exept.de>
parents:
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diff
changeset
|
545 |
] |
81 | 546 |
]. |
1151
1a3682212ea9
Move rest of menuHolder/menuPerformer stuff to view.
Stefan Vogel <sv@exept.de>
parents:
1149
diff
changeset
|
547 |
|
1152
21c666e130dd
menuHolder/menuPerformer stuff.
Stefan Vogel <sv@exept.de>
parents:
1151
diff
changeset
|
548 |
"Modified: 3.1.1997 / 02:11:15 / stefan" |
118 | 549 |
! ! |
550 |
||
551 |
!View methodsFor:'realization'! |
|
552 |
||
553 |
destroy |
|
554 |
"unrealize & destroy - make me invisible, destroy subviews then |
|
555 |
make me unknown to the device" |
|
556 |
||
557 |
model notNil ifTrue:[ |
|
558 |
model removeDependent:self. |
|
559 |
model := nil. |
|
560 |
]. |
|
561 |
super destroy. |
|
562 |
! ! |
|
269 | 563 |
|
564 |
!View class methodsFor:'documentation'! |
|
565 |
||
566 |
version |
|
1500
d70af951e8b4
care for nil channel in #setupChannel...
Claus Gittinger <cg@exept.de>
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diff
changeset
|
567 |
^ '$Header: /cvs/stx/stx/libview/View.st,v 1.58 1997-03-28 19:57:22 cg Exp $' |
269 | 568 |
! ! |