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546
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"
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COPYRIGHT (c) 1997 by eXept Software AG
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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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395
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Object subclass:#DropObject
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instanceVariableNames:'theObject'
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classVariableNames:''
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poolDictionaries:''
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category:'Interface-Support'
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!
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403
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DropObject class instanceVariableNames:'DisplayObject'
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"
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The following class instance variables are inherited by this class:
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Object -
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"
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!
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DropObject subclass:#Text
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instanceVariableNames:''
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classVariableNames:''
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poolDictionaries:''
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privateIn:DropObject
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!
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DropObject subclass:#Image
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instanceVariableNames:''
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classVariableNames:''
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poolDictionaries:''
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privateIn:DropObject
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!
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546
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DropObject subclass:#Color
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403
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instanceVariableNames:''
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395
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classVariableNames:''
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poolDictionaries:''
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privateIn:DropObject
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!
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546
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DropObject subclass:#File
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instanceVariableNames:'info isHtmlFile isImageFile isPrintable'
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classVariableNames:''
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poolDictionaries:''
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privateIn:DropObject
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!
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!DropObject class methodsFor:'documentation'!
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copyright
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"
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COPYRIGHT (c) 1997 by eXept Software AG
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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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67 |
only in accordance with the terms of that license and with the
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68 |
inclusion of the above copyright notice. This software may not
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69 |
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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instances of myself and subclasses wrap objects which are being
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dragged (and dropped).
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Any object can be dragged, but for some often encountered types,
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specialized subclasses are provided, which react to certain queries.
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[see also:]
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DragAndDropManager
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[author:]
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Claus Atzkern
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"
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! !
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395
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!DropObject class methodsFor:'instance creation'!
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new:someThing
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"create an instance dependant on something
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"
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|cls|
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someThing isColor ifTrue:[cls := Color
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] ifFalse:[someThing isImageOrForm ifTrue:[cls := Image
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] ifFalse:[(someThing isKindOf:Filename) ifTrue:[cls := File
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] ifFalse:[cls isString ifTrue:[cls := Text
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] ifFalse:[
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cls := DropObject
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]]]].
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^ cls new theObject:someThing
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!
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newColor:aColor
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^ Color new theObject:aColor
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!
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newFile:aFilename
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^ File new theObject:aFilename
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!
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newImage:anImageOrForm
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^ Image new theObject:anImageOrForm
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!
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newText:aTextOrString
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^ Text new theObject:aTextOrString
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! !
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403
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!DropObject class methodsFor:'defaults'!
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displayObject
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"return some object which is shown while dragging;
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here an image based upon my displayObjectName is returned.
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Either this method or #displayObjectName is usually redefined
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in subclasses"
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403
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DisplayObject notNil ifTrue:[
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^ DisplayObject
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].
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DisplayObject := Smalltalk::Image fromFile:(self displayObjectName).
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^ DisplayObject
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546
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"Modified: 19.4.1997 / 13:04:05 / cg"
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!
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displayObject:aDisplayObject
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"set the object which is shown while dragging;
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this object must understand #displayOn:x:y: (i.e. the displayObject
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protocol). The object is kept per class for ALL future drag operations.
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Useful to change the default images in subclasses."
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DisplayObject := aDisplayObject
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"Modified: 19.4.1997 / 15:42:10 / cg"
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403
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!
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displayObjectName
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546
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"return the name of a bitmap image file, which is used
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during a drag.
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Here, a dummy file is returned."
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403
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159 |
^ 'bitmaps/xpmBitmaps/plain_pixmaps/balloon3.xpm'
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546
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"Modified: 19.4.1997 / 13:54:13 / cg"
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403
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! !
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395
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!DropObject methodsFor:'accessing'!
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theObject
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546
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"return the real object represented by the receiver"
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395
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546
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^ theObject
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"Modified: 19.4.1997 / 12:53:01 / cg"
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!
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395
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theObject:something
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"set the real object represented by the receiver"
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theObject := something.
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"Modified: 19.4.1997 / 12:53:10 / cg"
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! !
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395
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396
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!DropObject methodsFor:'queries'!
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displayObject
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"return my graphical representation - here a default is returned"
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546
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403
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^ self class displayObject
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546
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"Modified: 19.4.1997 / 12:52:41 / cg"
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396
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! !
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395
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!DropObject methodsFor:'testing'!
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isColorObject
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546
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"return true, if the dropObject represents a color"
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^ false
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546
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"Modified: 19.4.1997 / 12:52:36 / cg"
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395
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!
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isFileObject
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"return true, if the dropObject represents some file or directory"
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^ false
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546
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"Modified: 19.4.1997 / 12:52:29 / cg"
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395
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!
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isImageObject
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546
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"return true, if the dropObject represents some image"
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^ false
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546
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"Modified: 19.4.1997 / 12:52:22 / cg"
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395
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!
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isTextObject
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546
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"return true, if the dropObject represents some text"
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^ false
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546
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"Modified: 19.4.1997 / 12:52:17 / cg"
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! !
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225 |
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!DropObject::Text class methodsFor:'defaults'!
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displayObjectName
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^ 'bitmaps/xpmBitmaps/document_images/yellow_file_text_grab.xpm'
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230 |
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"Modified: 19.4.1997 / 15:40:33 / cg"
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! !
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!DropObject::Text methodsFor:'testing'!
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isTextObject
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"return true, if the dropObject represents some text"
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^ true
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"Modified: 19.4.1997 / 12:52:08 / cg"
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! !
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243 |
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!DropObject::Image class methodsFor:'defaults'!
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displayObjectName
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"return the name of a bitmap image file, which is used
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248 |
during a drag."
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249 |
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^ 'bitmaps/xpmBitmaps/misc_tools/picture.xpm'
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251 |
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"Modified: 19.4.1997 / 15:38:02 / cg"
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! !
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254 |
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!DropObject::Image methodsFor:'testing'!
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isImageObject
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"return true, if the dropObject represents an image"
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^ true
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"Modified: 19.4.1997 / 12:51:28 / cg"
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! !
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264 |
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!DropObject::Color class methodsFor:'defaults'!
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displayObjectName
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"return the name of a bitmap image file, which is used
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during a drag."
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270 |
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^ 'bitmaps/xpmBitmaps/misc_tools/color_wheel.xpm'
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272 |
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"Modified: 19.4.1997 / 15:38:12 / cg"
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! !
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275 |
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!DropObject::Color methodsFor:'testing'!
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isColorObject
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"return true, if the dropObject represents a color"
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^ true
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"Modified: 19.4.1997 / 12:51:57 / cg"
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395
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! !
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403
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!DropObject::File class methodsFor:'defaults'!
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displayObjectName
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546
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"return the name of a bitmap image file, which is used
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during a drag."
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403
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546
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292 |
^ 'bitmaps/xpmBitmaps/document_images/xfm_file.xpm'
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403
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546
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"Modified: 19.4.1997 / 15:38:07 / cg"
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! !
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!DropObject::File methodsFor:'accessing'!
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theObject:aPathname
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546
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|f path|
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403
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546
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f := aPathname asFilename.
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path := f pathName.
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info := f info.
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403
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546
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super theObject:f
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"Modified: 19.4.1997 / 12:49:17 / cg"
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403
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! !
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!DropObject::File methodsFor:'queries'!
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exists
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546
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"returns true if the file or directory exists
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"
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^ info notNil
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546
|
317 |
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"Modified: 19.4.1997 / 12:49:30 / cg"
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403
|
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!
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isDirectory
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"checks whether file is a directory
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"
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^ (info notNil and:[info type == #directory])
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!
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326 |
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isHtmlFile
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546
|
328 |
"checks whether file is an html file
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403
|
329 |
"
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330 |
|suffixes pathName|
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331 |
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isHtmlFile isNil ifTrue:[
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333 |
(info isNil or:[self isDirectory]) ifTrue:[
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|
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isHtmlFile := false
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|
335 |
] ifFalse:[
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pathName := theObject asString.
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|
337 |
suffixes := #( '.html' '.htm' '.HTML' '.HTM' ).
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|
338 |
isHtmlFile := (suffixes findFirst:[:el|pathName endsWith:el]) ~~ 0
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]
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].
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341 |
^ isHtmlFile
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546
|
342 |
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343 |
"Modified: 19.4.1997 / 12:49:37 / cg"
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403
|
344 |
!
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345 |
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346 |
isImageFile
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546
|
347 |
"returns true if file is an image file
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403
|
348 |
"
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546
|
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|pathName|
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403
|
350 |
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|
351 |
isImageFile isNil ifTrue:[
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352 |
(info isNil or:[self isDirectory]) ifTrue:[
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|
353 |
isImageFile := false
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|
354 |
] ifFalse:[
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|
355 |
pathName := theObject asString.
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|
546
|
356 |
isImageFile := Image isImageFileSuffix:(pathName asFilename suffix).
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403
|
357 |
]
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].
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|
359 |
^ isImageFile
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|
360 |
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546
|
361 |
"Modified: 19.4.1997 / 12:50:58 / cg"
|
|
403
|
362 |
!
|
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|
363 |
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364 |
isPrintable
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|
365 |
"returns false if file contains non printable characters
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|
366 |
"
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|
367 |
|stream buff size|
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368 |
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|
369 |
isPrintable isNil ifTrue:[
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|
370 |
isPrintable := false.
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|
371 |
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|
372 |
(info isNil or:[self isDirectory]) ifFalse:[
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|
373 |
stream := FileStream readonlyFileNamed:(theObject pathName).
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374 |
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|
375 |
stream isNil ifFalse:[
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|
376 |
buff := String new:300.
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|
377 |
size := stream nextBytes:300 into:buff.
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|
378 |
stream close.
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|
379 |
].
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|
380 |
1 to:size do:[:i|
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|
381 |
(buff at:i) isPrintable ifFalse:[
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|
382 |
^ isPrintable
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383 |
]
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384 |
].
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|
385 |
isPrintable := true
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|
386 |
]
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387 |
].
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|
388 |
^ isPrintable
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389 |
! !
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390 |
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|
391 |
!DropObject::File methodsFor:'testing'!
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|
392 |
|
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393 |
isFileObject
|
|
546
|
394 |
"return true, if the dropObject represents a file- or directory"
|
|
396
|
395 |
|
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|
396 |
^ true
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|
397 |
|
|
546
|
398 |
"Modified: 19.4.1997 / 12:51:49 / cg"
|
|
395
|
399 |
! !
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|
400 |
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|
401 |
!DropObject class methodsFor:'documentation'!
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402 |
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403 |
version
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|
546
|
404 |
^ '$Header: /cvs/stx/stx/libview2/DropObject.st,v 1.4 1997-04-19 13:44:35 cg Exp $'
|
|
395
|
405 |
! !
|