"

 COPYRIGHT (c) 1994 by Claus Gittinger

	      All Rights Reserved

 This software is furnished under a license and may be used

 only in accordance with the terms of that license and with the

 inclusion of the above copyright notice.   This software may not

 be provided or otherwise made available to, or used by, any

 other person.  No title to or ownership of the software is

 hereby transferred.

"

ListEntry subclass:#MultiColListEntry

	instanceVariableNames:'strings tabSpec'

	classVariableNames:'DefaultTabSpec'

	poolDictionaries:''

	category:'Views-Support'

!

!MultiColListEntry class methodsFor:'documentation'!

copyright

"

 COPYRIGHT (c) 1994 by Claus Gittinger

	      All Rights Reserved

 This software is furnished under a license and may be used

 only in accordance with the terms of that license and with the

 inclusion of the above copyright notice.   This software may not

 be provided or otherwise made available to, or used by, any

 other person.  No title to or ownership of the software is

 hereby transferred.

"

!

documentation

"

    Instances of MultiColListEntry can be used in place of strings

    as entries of the list in a ListView or SelectionInListView.

    They allow data to be presented in table (or any other) form.

    See example here and in TabulatorSpecs documentation.

    Notice, that each entry can have its own tabulator specification;

    although, usually all share a single spec.

    Also, notice that each column may align different; making these

    perfect elements to present table data.

    MultiColListEntry and TabulatorSpec were originally created to

    support nice tabular display of file-lists in the FileBrowser

    (see its long list); you may find many other uses ...

    [author:]

        Claus Gittinger

"

!

examples

"

     putting multiColListEntries into a ListView

     (instead of strings)'

                                                                        [exBegin]

        |v e myList tabs|

        myList := OrderedCollection new.

        tabs := TabulatorSpecification new.

        tabs unit:#inch.

        tabs positions:#(0 3 4).

        tabs align:#(left #center #left).

        e := MultiColListEntry 

                 fromString:'left centered left'.

        e tabulatorSpecification:tabs.

        myList add:e.

        e := MultiColListEntry 

                 fromString:'| | |'.

        e tabulatorSpecification:tabs.

        myList add:e.

        myList add:''.

        e := MultiColListEntry 

                 fromString:'hello hallo salut'.

        e tabulatorSpecification:tabs.

        myList add:e.

        e := MultiColListEntry 

                 fromString:'good morning,guten Morgen,bon jour'

                 separatedBy:$,.

        e tabulatorSpecification:tabs.

        myList add:e.

        e := MultiColListEntry new.

        e colAt:1 put:'good bye'.

        e colAt:2 put:'auf Wiedersehen'.

        e colAt:3 put:'au revoir '.

        e tabulatorSpecification:tabs.

        myList add:e.

        v := ListView new.

        v setList:myList expandTabs:false.

        v extent:500@100.

        v open

                                                                        [exEnd]

     many multiColListEntries in a scrollable ListView

                                                                        [exBegin]

        |v l e myList tabs|

        myList := OrderedCollection new.

        tabs := TabulatorSpecification new.

        tabs unit:#cm.

        tabs positions:#(1 3 5).

        tabs align:#(#right #center #left).

        1 to:100 do:[:i|

            e := MultiColListEntry new.

            e colAt:1 put:i printString.

            e colAt:2 put:i squared printString.

            e colAt:3 put:i sqrt  printString.

            e tabulatorSpecification:tabs.

            myList add:e.

        ].

        l := ListView new.

        l setList:myList expandTabs:false.

        v := ScrollableView forView:l.

        v extent:300@200.

        v open

                                                                        [exEnd]

     like above, but uses nicer decimal alignments

                                                                        [exBegin]

        |v l e myList tabs|

        myList := OrderedCollection new.

        tabs := TabulatorSpecification new.

        tabs unit:#cm.

        tabs positions:#(1 3 6 9 12).

        tabs align:#(#right #decimal #decimal #decimal #decimal).

        1 to:100 do:[:i|

            e := MultiColListEntry new.

            e colAt:1 put:i printString.

            e colAt:2 put:i log printString.

            e colAt:3 put:i sqrt  printString.

            e colAt:4 put:i sin  printString.

            e colAt:5 put:i cos  printString.

            e tabulatorSpecification:tabs.

            myList add:e.

        ].

        l := ListView new.

        l setList:myList expandTabs:false.

        v := ScrollableView forView:l.

        v extent:600@200.

        v open

                                                                        [exEnd]

     specifying tabs in inches

                                                                        [exBegin]

        |v l e myList tabs|

        myList := OrderedCollection new.

        tabs := TabulatorSpecification new.

        tabs unit:#inch.

        tabs positions:#(0 2 3.5 4 6 8 10 12).

        e := MultiColListEntry new.

        e colAt:1 put:'2'.

        e colAt:2 put:'3.5'.

        e colAt:3 put:'4'.

        e colAt:4 put:'6'.

        e colAt:5 put:'8'.

        e colAt:6 put:'10'.

        e colAt:7 put:'12'.

        e tabulatorSpecification:tabs.

        myList add:e.

        myList add:((MultiColListEntry fromString:'| | | | | | |')

                         tabulatorSpecification:tabs).

        myList add:((MultiColListEntry fromString:'xxx xxx xxx xxx xxx xxx xxx')

                         tabulatorSpecification:tabs).

        l := ListView new.

        l setList:myList expandTabs:false.

        v := HVScrollableView forView:l.

        v extent:600@200.

        v open

                                                                        [exEnd]

     if you have the columns available as a collection, 

     setup can be done easier

                                                                        [exBegin]

        |v l e myList tabs|

        myList := OrderedCollection new.

        tabs := TabulatorSpecification new.

        tabs unit:#inch.

        tabs positions:#(0 2 3.5 4 6 8 10 12).

        e := MultiColListEntry new.

        e strings:#('2' '3.5' '4' '6' '8' '10' '12').

        e tabulatorSpecification:tabs.

        myList add:e.

        l := ListView new.

        l setList:myList expandTabs:false.

        v := HVScrollableView forView:l.

        v extent:600@200.

        v open

                                                                        [exEnd]

     using icons instead of strings:

                                                                        [exBegin]

        |v l e myList tabs i1 i2 i3|

        myList := OrderedCollection new.

        tabs := TabulatorSpecification new.

        tabs unit:#cm.

        tabs positions:#(1 3 5).

        tabs align:#(#left #left #left).

        i1 := Image fromFile:'bitmaps/xpmBitmaps/document_images/small_dir.xpm'.

        i2 := Image fromFile:'bitmaps/xpmBitmaps/document_images/small_file.xpm'.

        i3 := Image fromFile:'bitmaps/xpmBitmaps/document_images/small_file_binary.xpm'.

        1 to:100 do:[:i|

            e := MultiColListEntry new.

            i odd ifTrue:[

                e colAt:1 put:i1.

            ] ifFalse:[

                e colAt:1 put:i2

            ].

            e colAt:2 put:i printString.

            e colAt:3 put:i3.

            e tabulatorSpecification:tabs.

            myList add:e.

        ].

        l := SelectionInListView new.

        l setList:myList expandTabs:false.

        v := ScrollableView forView:l.

        v extent:300@200.

        v open

                                                                        [exEnd]

    concrete example, show /etc/passwd in a table:

                                                                        [exBegin]

        |v l s myList line e htabs tabs fingerEntry|

        tabs := TabulatorSpecification new.

        tabs unit:#inch.

        tabs positions:#(0    2      3.5  4.5   5    8    11).

        tabs align:    #(left left right right left left left).

        htabs := TabulatorSpecification new.

        htabs unit:#inch.

        htabs positions:#(0    2      3.5      4.5    5    8    11).

        htabs align:    #(left center center center left left left).

        myList := OrderedCollection new.

        e := MultiColListEntry 

                    fromString:'login-name:password:uid:gid:finger-entry:home-dir:shell' 

                    separatedBy:$:.

        e tabulatorSpecification:htabs.

        myList add:e.

        myList add:''.

        s := '/etc/passwd' asFilename readStream.

        [s atEnd] whileFalse:[

            line := s nextLine.

            e := MultiColListEntry 

                        fromString:line

                        separatedBy:$:.

            fingerEntry := e colAt:5.

            e colAt:5 put:(fingerEntry asCollectionOfSubstringsSeparatedBy:$,) first.

            e tabulatorSpecification:tabs.

            myList add:e.

        ].

        s close.

        l := ListView new.

        l setList:myList expandTabs:false.

        v := HVScrollableView forView:l.

        v extent:600@200.

        v open

                                                                        [exEnd]

"

! !

!MultiColListEntry class methodsFor:'instance creation'!

fromString:aString

    "create and return a new listEntry with columns taken

     from the words of aString. Assumes that columns are

     separated by spaces in the string"

    ^ self fromString:aString separatedBy:Character space

!

fromString:aString separatedBy:separatorCharacter

    "create and return a new listEntry with columns taken

     from the words of aString. Assumes that columns are

     separated by separatorCharacter in the string"

    |subStrings e|

    e := self new.

    subStrings := aString asCollectionOfSubstringsSeparatedBy:separatorCharacter.

    subStrings keysAndValuesDo:[:i :sub |

        e colAt:i put:sub.

    ].

    ^ e

!

new:numberOfColumns

    "create and return a new listEntry with numberOfColumns empty columns"

    |e|

    e := self new.

    1 to:numberOfColumns do:[:i |

        e colAt:i put:''.

    ].

    ^ e

    "Modified: 30.8.1995 / 16:33:53 / claus"

!

new:numberOfColumns tabulatorSpecification:aTabSpec

    "create and return a new listEntry with numberOfColumns empty columns

     and the given tab-specification"

    ^ (self new:numberOfColumns) tabulatorSpecification:aTabSpec

    "Modified: 30.8.1995 / 16:34:23 / claus"

! !

!MultiColListEntry methodsFor:'accessing'!

colAt:index

    "return the substring at column index"

    index > strings size ifTrue:[^ nil].

    ^ strings at:index

!

colAt:index put:aString

    "replace the substring at column index"

    strings isNil ifTrue:[

	strings := OrderedCollection new:index

    ].

    index > strings size ifTrue:[strings grow:index].

    strings at:index put:aString

!

strings:aCollectionOfStrings

    "replace all substrings"

    strings := OrderedCollection withAll:aCollectionOfStrings. 

!

tabulatorSpecification:aTabSpec

    "set the tabulator spec"

    tabSpec := aTabSpec

! !

!MultiColListEntry methodsFor:'converting'!

asString

    "return the receiver as a string with embedded tabs"

    |s sub tab 

     nSub "{ Class: SmallInteger }"|

    s := ''.

    tab := Character tab asString.

    nSub := strings size.

    1 to:nSub do:[:subStringIndex |

        sub := strings at:subStringIndex.

        sub notNil ifTrue:[

            sub isString ifTrue:[

                s := s , sub.

            ]

        ].

        subStringIndex == nSub ifFalse:[

            s := s , tab

        ]

    ].

    ^ s

    "Created: 24.11.1995 / 18:54:27 / cg"

    "Modified: 17.4.1997 / 03:21:13 / cg"

! !

!MultiColListEntry methodsFor:'defaults'!

defaultTabSpec

    "the default tabulators are 1 inch apart"

    |spec|

    spec := DefaultTabSpec.

    spec isNil ifTrue:[

	spec := TabulatorSpecification new.

	spec unit:#inch.

	spec positions:(0 to:20).

	spec align:    #left.

	DefaultTabSpec := spec.

    ].

    ^ spec.

    "Created: 17.11.1995 / 12:23:29 / cg"

    "Modified: 17.11.1995 / 12:24:20 / cg"

! !

!MultiColListEntry methodsFor:'drawing'!

displayOn:aGC x:x y:y opaque:opaque

    "display the receiver on a GC"

    |xPos spec tabPos prevString y0|

    spec := tabSpec.

    spec isNil ifTrue:[

        spec := self defaultTabSpec

    ].

    xPos := x.

    prevString := ''.

    y0 := y - aGC font ascent.

    strings keysAndValuesDo:[:index :subString |

        |item|

        subString notNil ifTrue:[

            "

             find next tab

            "

            tabPos := spec positionOfTab:index forString:subString on:aGC.

            tabPos isNil ifTrue:[

                "

                 no tab - just continue where we are ...

                "

                xPos := xPos + (prevString widthOn:aGC). "/ (aGC font widthOf:prevString).

            ] ifFalse:[

                xPos := tabPos + x.

            ].

            subString isString ifFalse:[

                item := subString.

                item isImage ifTrue:[

                    strings at:index put:(item := item on:aGC device)

                ].

                item displayOn:aGC x:xPos y:y0

            ] ifTrue:[

                opaque ifTrue:[    

                    aGC displayOpaqueString:subString x:xPos y:y.

                ] ifFalse:[    

                    aGC displayString:subString x:xPos y:y.

                ].    

            ].

            prevString := subString.

        ]

    ].

    "Modified: 19.4.1997 / 09:54:56 / cg"

! !