author | Claus Gittinger <cg@exept.de> |
Tue, 28 Oct 1997 20:32:28 +0100 | |
changeset 722 | ea6d08251333 |
parent 508 | 64ee54ff8a77 |
child 726 | cdab756aebe4 |
permissions | -rw-r--r-- |
442 | 1 |
PluggableAdaptor subclass:#TypeConverter |
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instanceVariableNames:'' |
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classVariableNames:'' |
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poolDictionaries:'' |
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category:'Interface-Support-Models' |
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! |
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!TypeConverter class methodsFor:'documentation'! |
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documentation |
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" |
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a typeConverter can be used as an editFields model |
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(remember, that an editField expects a string in its model), |
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to convert the fields string value to some object and vice versa. |
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Its main use is when building interfaces with inputFields, |
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where the datum to be entered is a non-string and you |
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want to have the entered value be converted automatically. |
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(and vice versa, to convert the datum to a string). |
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442 | 20 |
No real new functionality is added here - all is inherited |
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from PluggableAdapter; however, some specialized instance creation |
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methods are added here.. |
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Notice: |
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this class was implemented using protocol information |
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from alpha testers - it may not be complete or compatible to |
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the corresponding ST-80 class. |
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If you encounter any incompatibilities, please forward a note |
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describing the incompatibility verbal (i.e. no code) to the ST/X team. |
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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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" |
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convert a number to a string: |
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[exBegin] |
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|v t i| |
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v := 1 asValue. |
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t := HorizontalPanelView new. |
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t extent:200@50. |
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t horizontalLayout:#fitSpace. |
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i := EditField in:t. |
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i model:(TypeConverter onNumberValue:v). |
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t open. |
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(Delay forSeconds:3) wait. |
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v value:2. |
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[exEnd] |
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convert a date to a string: |
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[exBegin] |
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|d v| |
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v := nil asValue. |
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d := DialogBox new. |
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d addInputFieldOn:(TypeConverter onDateValue:v). |
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d addOkButton. |
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d open. |
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d accepted ifTrue:[ |
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Transcript showCR:v value |
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] |
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[exEnd] |
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" |
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! ! |
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!TypeConverter class methodsFor:'instance creation'! |
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onDateValue:aValueHolder |
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"create and return a typeConverter, which retrieves |
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a date via #value, and converts |
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a date-string to a date via #value:. |
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Useful as an editFields model, which operates on some |
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date value (or aspectAdaptor, which adapts to a numeric slot)" |
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^ (self on:aValueHolder) dateToText |
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"Modified: 21.2.1997 / 18:46:11 / cg" |
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"Created: 4.3.1997 / 12:30:49 / cg" |
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! |
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onNumberValue:aValueHolder |
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"create and return a typeConverter, which retrieves |
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a values string representation via #value, and converts |
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a number-string to a value via #value:. |
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Useful as an editFields model, which operates on some |
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numeric value (or aspectAdaptor, which adapts to a numeric slot)" |
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^ (self on:aValueHolder) numberToText |
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"Modified: 21.2.1997 / 18:46:11 / cg" |
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! |
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onNumberValue:aValueHolder format:formatString |
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"create and return a typeConverter, which retrieves |
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a values string representation via #value, and converts |
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a number-string to a value via #value:. |
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Useful as an editFields model, which operates on some |
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numeric value (or aspectAdaptor, which adapts to a numeric slot)" |
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^ (self on:aValueHolder) numberToTextFormattedBy:formatString |
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"Created: 4.3.1997 / 11:51:25 / cg" |
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"Modified: 4.3.1997 / 11:51:41 / cg" |
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! |
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onSymbolValue:aValueHolder |
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"create and return a typeConverter, which retrieves |
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a symbol-values string representation via #value, and converts |
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a string to a symbol via #value:. |
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Useful as an editFields model, which operates on some |
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numeric value (or aspectAdaptor, which adapts to a numeric slot)" |
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^ (self on:aValueHolder) symbolOrNil |
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"Modified: 21.2.1997 / 18:46:11 / cg" |
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! |
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onTimeValue:aValueHolder |
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"create and return a typeConverter, which retrieves |
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a time via #value, and converts |
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a time-string to a time via #value:. |
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Useful as an editFields model, which operates on some |
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date value (or aspectAdaptor, which adapts to a numeric slot)" |
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^ (self on:aValueHolder) timeToText |
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"Modified: 21.2.1997 / 18:46:11 / cg" |
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"Created: 4.3.1997 / 11:52:10 / cg" |
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! ! |
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!TypeConverter methodsFor:'accessing'! |
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subject |
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"return the cobverted subject" |
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^ model |
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"Created: 21.2.1997 / 18:45:12 / cg" |
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! |
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value:newValue |
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"convert and change" |
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self setValue:newValue |
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"Created: 21.2.1997 / 18:45:39 / cg" |
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! ! |
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!TypeConverter methodsFor:'initialize-release'! |
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parents:
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arrayLiteralOrSymbolOrNil |
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"setup the converter to convert from a string to either a literal |
ea6d08251333
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parents:
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Array or a symbol and vice versa. |
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parents:
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Invalid strings (i.e. empty) are converted to nil; |
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parents:
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nil values are converted to an empty string. |
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This is a very special converter (for the GUI builder) |
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- probably not belonging to here" |
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|
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self |
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getBlock:[:model | |
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|symbolValue| |
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(symbolValue := model value) isNil ifTrue:[ |
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String new |
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] ifFalse:[ |
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symbolValue isArray ifTrue:[ |
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symbolValue storeString |
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] ifFalse:[ |
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'#' , symbolValue asString |
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] |
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]] |
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|
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putBlock: |
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[:model :string | |
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|value s| |
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|
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string isEmpty ifTrue:[ |
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value := nil |
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] ifFalse:[ |
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s := string withoutSeparators. |
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(s startsWith:'#(') ifTrue:[ |
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value := Array readFrom:s onError:nil |
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] ifFalse:[ |
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(s startsWith:'#') ifTrue:[ |
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s := s copyFrom:2 |
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]. |
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value := s asSymbol |
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] |
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]. |
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model value:value] |
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|
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updateBlock: [:m :a :p | true] |
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|
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"Modified: / 26.10.1997 / 13:50:32 / cg" |
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"Created: / 26.10.1997 / 14:01:02 / cg" |
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206 |
! |
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487 | 208 |
dateOrNil |
209 |
"setup the converter to convert from a string to a date |
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parents:
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diff
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210 |
and vice versa. Invalid dates are converted to nil; likewise, |
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parents:
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diff
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211 |
a nil date is converted to an empty string." |
487 | 212 |
|
213 |
self |
|
214 |
getBlock:[:model | |
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215 |
|date| |
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216 |
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217 |
(date := model value) isNil ifTrue:[ |
|
218 |
'' |
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219 |
] ifFalse:[ |
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220 |
date printString |
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]] |
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222 |
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223 |
putBlock: |
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[:model :string | |
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225 |
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226 |
|value| |
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227 |
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228 |
string isEmpty ifTrue:[ |
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229 |
value := nil |
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] ifFalse:[ |
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231 |
value := Date readFrom:string onError:nil |
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]. |
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233 |
model value:value] |
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234 |
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235 |
updateBlock: [:m :a :p | true] |
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236 |
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"Created: / 4.3.1997 / 11:56:36 / cg" |
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parents:
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238 |
"Modified: / 26.10.1997 / 13:51:06 / cg" |
487 | 239 |
! |
240 |
||
486 | 241 |
dateToText |
242 |
"setup the converter to convert from a string to a date |
|
722
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parents:
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diff
changeset
|
243 |
and vice versa. Nil is converted to todays date-string, |
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parents:
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diff
changeset
|
244 |
likewise, an empty string is converted back to todays date." |
486 | 245 |
|
246 |
self |
|
247 |
getBlock:[:model | |
|
248 |
|date| |
|
249 |
||
250 |
(date := model value) isNil ifTrue:[ |
|
251 |
Date today printString |
|
252 |
] ifFalse:[ |
|
253 |
date printString |
|
254 |
]] |
|
255 |
||
256 |
putBlock: |
|
257 |
[:model :string | |
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258 |
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259 |
|value| |
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260 |
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261 |
string isEmpty ifTrue:[ |
|
262 |
value := Date today |
|
263 |
] ifFalse:[ |
|
264 |
value := Date readFrom:string onError:Date today |
|
265 |
]. |
|
266 |
model value:value] |
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267 |
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268 |
updateBlock: [:m :a :p | true] |
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269 |
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"Created: / 4.3.1997 / 12:32:19 / cg" |
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271 |
"Modified: / 26.10.1997 / 13:52:00 / cg" |
486 | 272 |
! |
273 |
||
508 | 274 |
number |
275 |
"setup the converter to convert from a string to a number |
|
276 |
and vice versa. Invalid numbers are converted to nil." |
|
277 |
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278 |
self numberToText |
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279 |
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280 |
"Created: 4.4.1997 / 12:46:14 / cg" |
|
281 |
! |
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282 |
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442 | 283 |
numberOrNil |
284 |
"setup the converter to convert from a string to a number |
|
285 |
and vice versa. Invalid numbers are converted to nil." |
|
286 |
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287 |
self |
|
288 |
getBlock:[:model | |
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289 |
|numericValue| |
|
290 |
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291 |
(numericValue := model value) isNil ifTrue:[ |
|
292 |
String new |
|
293 |
] ifFalse:[ |
|
294 |
numericValue printString |
|
295 |
]] |
|
296 |
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297 |
putBlock: |
|
298 |
[:model :string | |
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299 |
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300 |
|value| |
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301 |
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302 |
string isEmpty ifTrue:[ |
|
303 |
value := nil |
|
304 |
] ifFalse:[ |
|
447 | 305 |
value := Number readFrom:string onError:nil |
442 | 306 |
]. |
307 |
model value:value] |
|
308 |
||
309 |
updateBlock: [:m :a :p | true] |
|
310 |
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311 |
"Created: 21.2.1997 / 18:58:38 / cg" |
|
312 |
! |
|
313 |
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314 |
numberToText |
|
315 |
"setup the converter to convert from a string to a number |
|
487 | 316 |
and vice versa." |
442 | 317 |
|
318 |
self |
|
319 |
getBlock:[:model | |
|
320 |
|numericValue| |
|
321 |
||
322 |
(numericValue := model value) isNil ifTrue:[ |
|
323 |
String new |
|
324 |
] ifFalse:[ |
|
325 |
numericValue printString |
|
326 |
]] |
|
327 |
||
328 |
putBlock: |
|
329 |
[:model :string | |
|
330 |
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331 |
|value| |
|
332 |
||
333 |
string isEmpty ifTrue:[ |
|
334 |
value := 0 |
|
335 |
] ifFalse:[ |
|
336 |
value := string asNumber |
|
337 |
]. |
|
338 |
model value:value] |
|
339 |
||
340 |
updateBlock: [:m :a :p | true] |
|
341 |
||
342 |
"Created: 21.2.1997 / 18:57:05 / cg" |
|
487 | 343 |
"Modified: 4.3.1997 / 11:50:29 / cg" |
442 | 344 |
! |
345 |
||
346 |
numberToTextFormattedBy:formatString |
|
347 |
"setup the converter to convert from a string to a number |
|
348 |
and vice versa, using formatString. |
|
349 |
The formatString is currently ignored when numbers are converted |
|
350 |
from a string." |
|
351 |
||
352 |
self |
|
353 |
getBlock:[:model | |
|
354 |
|numericValue| |
|
355 |
||
356 |
(numericValue := model value) isNil ifTrue:[ |
|
357 |
String new |
|
358 |
] ifFalse:[ |
|
359 |
PrintConverter print:numericValue formattedBy:formatString |
|
360 |
]] |
|
361 |
||
362 |
putBlock: |
|
363 |
[:model :string | |
|
364 |
||
365 |
|value| |
|
366 |
||
367 |
string isEmpty ifTrue:[ |
|
368 |
value := 0 |
|
369 |
] ifFalse:[ |
|
370 |
value := string asNumber "asNumberFromFormatString:formatString" |
|
371 |
]. |
|
372 |
model value:value] |
|
373 |
||
374 |
updateBlock: [:m :a :p | true] |
|
375 |
||
376 |
"Modified: 21.2.1997 / 18:59:44 / cg" |
|
446 | 377 |
! |
378 |
||
379 |
symbolOrNil |
|
380 |
"setup the converter to convert from a string to a symbol |
|
722
ea6d08251333
added #arrayLiteralOrSymbolOrNil
Claus Gittinger <cg@exept.de>
parents:
508
diff
changeset
|
381 |
and vice versa. Invalid symbols (i.e. empty) are converted to nil; |
ea6d08251333
added #arrayLiteralOrSymbolOrNil
Claus Gittinger <cg@exept.de>
parents:
508
diff
changeset
|
382 |
nil values are converted to an empty string." |
446 | 383 |
|
384 |
self |
|
385 |
getBlock:[:model | |
|
386 |
|symbolValue| |
|
387 |
||
388 |
(symbolValue := model value) isNil ifTrue:[ |
|
389 |
String new |
|
390 |
] ifFalse:[ |
|
391 |
'#' , symbolValue asString |
|
392 |
]] |
|
393 |
||
394 |
putBlock: |
|
395 |
[:model :string | |
|
396 |
||
397 |
|value s| |
|
398 |
||
399 |
string isEmpty ifTrue:[ |
|
400 |
value := nil |
|
401 |
] ifFalse:[ |
|
402 |
s := string withoutSeparators. |
|
403 |
(s startsWith:'#') ifTrue:[ |
|
404 |
s := s copyFrom:2 |
|
405 |
]. |
|
406 |
value := s asSymbol |
|
407 |
]. |
|
408 |
model value:value] |
|
409 |
||
410 |
updateBlock: [:m :a :p | true] |
|
411 |
||
722
ea6d08251333
added #arrayLiteralOrSymbolOrNil
Claus Gittinger <cg@exept.de>
parents:
508
diff
changeset
|
412 |
"Created: / 21.2.1997 / 18:58:38 / cg" |
ea6d08251333
added #arrayLiteralOrSymbolOrNil
Claus Gittinger <cg@exept.de>
parents:
508
diff
changeset
|
413 |
"Modified: / 26.10.1997 / 13:50:32 / cg" |
487 | 414 |
! |
415 |
||
416 |
timeOrNil |
|
417 |
"setup the converter to convert from a string to a time |
|
418 |
and vice versa." |
|
419 |
||
420 |
self |
|
421 |
getBlock:[:model | |
|
422 |
|time| |
|
423 |
||
424 |
(time := model value) isNil ifTrue:[ |
|
425 |
'' |
|
426 |
] ifFalse:[ |
|
427 |
time printString |
|
428 |
]] |
|
429 |
||
430 |
putBlock: |
|
431 |
[:model :string | |
|
432 |
||
433 |
|value| |
|
434 |
||
435 |
string isEmpty ifTrue:[ |
|
436 |
value := nil |
|
437 |
] ifFalse:[ |
|
438 |
value := Time readFrom:string onError:nil |
|
439 |
]. |
|
440 |
model value:value] |
|
441 |
||
442 |
updateBlock: [:m :a :p | true] |
|
443 |
||
444 |
"Created: 4.3.1997 / 11:52:47 / cg" |
|
445 |
"Modified: 4.3.1997 / 12:05:48 / cg" |
|
446 |
! |
|
447 |
||
448 |
timeToText |
|
449 |
"setup the converter to convert from a string to a time |
|
450 |
and vice versa." |
|
451 |
||
452 |
self |
|
453 |
getBlock:[:model | |
|
454 |
|time| |
|
455 |
||
456 |
(time := model value) isNil ifTrue:[ |
|
457 |
Time now printString |
|
458 |
] ifFalse:[ |
|
459 |
time printString |
|
460 |
]] |
|
461 |
||
462 |
putBlock: |
|
463 |
[:model :string | |
|
464 |
||
465 |
|value| |
|
466 |
||
467 |
string isEmpty ifTrue:[ |
|
468 |
value := Time now |
|
469 |
] ifFalse:[ |
|
470 |
value := Time readFrom:string onError:Time now |
|
471 |
]. |
|
472 |
model value:value] |
|
473 |
||
474 |
updateBlock: [:m :a :p | true] |
|
475 |
||
476 |
"Modified: 21.2.1997 / 18:59:06 / cg" |
|
477 |
"Created: 4.3.1997 / 11:52:47 / cg" |
|
442 | 478 |
! ! |
479 |
||
480 |
!TypeConverter class methodsFor:'documentation'! |
|
481 |
||
482 |
version |
|
722
ea6d08251333
added #arrayLiteralOrSymbolOrNil
Claus Gittinger <cg@exept.de>
parents:
508
diff
changeset
|
483 |
^ '$Header: /cvs/stx/stx/libview2/TypeConverter.st,v 1.7 1997-10-28 19:32:28 cg Exp $' |
442 | 484 |
! ! |