"

 COPYRIGHT (c) 2004 by eXept Software AG

              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.

"

"{ Package: 'stx:goodies' }"

View subclass:#CharacterSetView

	instanceVariableNames:'codePageHolder selectedCodePointHolder masterViewOrNil'

	classVariableNames:''

	poolDictionaries:''

!

!CharacterSetView class methodsFor:'documentation'!

copyright

"

 COPYRIGHT (c) 2004 by eXept Software AG

              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

"

    Can be used both as an informative display of a font's characters

    Author:

        Claus Gittinger

"

!

examples

"

    CharacterSetView openOn:(Button defaultFont).

    CharacterSetView 

        openAsInputFor:Transcript

        label:'Input to Transcript'

        clickLabel:'Click to input character'

"

! !

!CharacterSetView class methodsFor:'instance creation'!

new

    ^ self basicNew initialize.

! !

!CharacterSetView class methodsFor:'startup'!

open

    self openOn:View defaultFont

    "

     self open

    "

!

openAsInputFor:aView label:viewLabel clickLabel:clickLabel

    ^ self 

        openOn:aView font

        label:viewLabel 

        clickLabel:clickLabel

        asInputFor:aView

!

openOn:aFont

    ^ self

        openOn:aFont 

        label:aFont printString

        clickLabel:'Click on glyph to see its codePoint.'

    "

     self openOn:(View defaultFont).

    "

!

openOn:aFont label:viewLabel clickLabel:clickLabel

    ^ self 

        openOn:aFont 

        label:viewLabel 

        clickLabel:clickLabel 

        asInputFor:nil

!

openOn:aFont label:viewLabel clickLabel:clickLabel asInputFor:aView

    |top panel v bNext bPrev bFirst bLast rangeLabel codePointLabel

     first last next prev enable update updateCodePoint w h

     minPage maxPage insertCharacter|

    minPage := 0.

    maxPage := (aFont onDevice:Screen current) getFontMetrics maxCode >> 8.

    top := StandardSystemView new.

    top label:viewLabel.

    v := self origin:0.0@0.0 corner:1.0@1.0 in:top.

    v topInset:25.

    v font:aFont.

    panel := HorizontalPanelView in:top.

    panel origin:(0.0 @ 0.0) corner:(1.0 @ 0.0).

    panel bottomInset:-25.

    panel horizontalLayout:#left.

    aView notNil ifTrue:[

        v useSameFontAs:aView.

    ].

    "/ actions

    aView notNil ifTrue:[

        insertCharacter := [:char | 

                                (char isString ifTrue:[char] ifFalse:[Array with:char])

                                do:[:char | |unicodePoint unicodeChar|

                                    unicodePoint := CharacterEncoder encode:(char codePoint) from:aView characterEncoding into:'unicode'.

                                    unicodeChar := Character value:unicodePoint.

                                    aView dispatchEvent:(WindowEvent keyPress:unicodeChar x:0 y:0 view:v).

                                    aView dispatchEvent:(WindowEvent keyRelease:unicodeChar x:0 y:0 view:v).

                                ].

                           ].

    ].

    updateCodePoint := [

            |selectedCodePoint selectedChar 

             isLetter isDigit isUppercase isLowercase|

            selectedCodePoint := v selectedCodePoint.

            selectedCodePoint isNil ifTrue:[

                codePointLabel label:clickLabel

            ] ifFalse:[

                selectedChar := Character value:selectedCodePoint.

                (#('unicde' 'iso10646-1' 'iso8859-1' 'ascii') includes:(v font encoding))

                ifTrue:[

                    isLetter := selectedChar isNationalLetter.

                    isDigit := selectedChar isNationalDigit.

                    isUppercase := selectedChar isUppercase.

                    isLowercase := selectedChar isLowercase.

                ] ifFalse:[

                    isLetter := isDigit := isUppercase := isLowercase := false.     "/ actually: unknown

                ].

                codePointLabel 

                    label:

                        ('Selected: u%1 %2 %3 %4'

                            bindWith:((selectedCodePoint printStringRadix:16) leftPaddedTo:4 with:$0)

                            with:((selectedCodePoint printString) leftPaddedTo:5)

                            with:(isUppercase ifTrue:'Uc' ifFalse:[isLowercase ifTrue:'lc' ifFalse:''])

                            with:(isLetter ifTrue:'Letter' ifFalse:[(isDigit ifTrue:'Digit' ifFalse:'')])

                        ).

            ].

            codePointLabel repairDamage.

            aView notNil ifTrue:[

                selectedCodePoint notNil ifTrue:[

                    insertCharacter value:(Character value:selectedCodePoint).

                    v selectedCodePointHolder value:nil.

                ]

            ]

    ].

    update := [

            |uOffs selectedCodePoint|

            uOffs := v codePage * 16r0100.

            rangeLabel label:('u%1 ... u%2' 

                        bindWith:((uOffs printStringRadix:16) leftPaddedTo:4 with:$0)

                        with:(((uOffs + 16rFF) printStringRadix:16) leftPaddedTo:4 with:$0)).

            rangeLabel repairDamage.

        ].

    minPage ~~ maxPage ifTrue:[

        enable := [

                v codePage > minPage ifTrue:[ 

                    bPrev enable. 

                    bFirst enable. 

                ] ifFalse:[

                    bPrev disable. 

                    bFirst disable. 

                ].

                v codePage < maxPage ifTrue:[ 

                    bNext enable. 

                    bLast enable. 

                ] ifFalse:[

                    bNext disable. 

                    bLast disable. 

                ].

            ].

    ].

    next := [

            v codePage:(v codePage + 1). 

            enable value.

            update value.

        ].

    prev := [

            v codePage:(v codePage - 1). 

            enable value.

            update value.

        ].

    first := [

            v codePage:minPage. 

            enable value.

            update value.

        ].

    last := [

            v codePage:maxPage. 

            enable value.

            update value.

        ].

    minPage ~~ maxPage ifTrue:[

        bFirst := Button label:(ToolbarIconLibrary start16x16Icon) in:panel.

        bFirst action:first.

        bPrev := Button label:(ToolbarIconLibrary back16x16Icon) in:panel.

        bPrev controller beTriggerOnDown.

        bPrev action:prev.

        bPrev disable.

        bPrev autoRepeat:true.

        bNext := Button label:(ToolbarIconLibrary forward16x16Icon) in:panel.

        bNext controller beTriggerOnDown.

        bNext action:next.

        bNext autoRepeat:true.

        bLast := Button label:(ToolbarIconLibrary finish16x16Icon) in:panel.

        bLast action:last.

        bLast disable.

    ].

    rangeLabel := Label label:'RangeStart .. RangeStop' in:panel.

    codePointLabel := Label label:clickLabel in:panel.

    codePointLabel foregroundColor:(Color blue).

    update value.

    enable value.

    v selectedCodePointHolder onChangeEvaluate:updateCodePoint.

    v codePageHolder onChangeEvaluate:update.

    w := v preferredExtent x max:(panel preferredExtent x).

    h := v preferredExtent y + (panel preferredExtent y).

    top extent:(w @ h).

    aView notNil ifTrue:[

        top application:(aView application).

        top beSlave.

    ].

    top open.

    ^ v

    "

     self openOn:(View defaultFont).

     self openOn:(Font family:'courier' face:'medium' style:'roman' size:12 encoding:'iso10646-1').

    "

! !

!CharacterSetView methodsFor:'accessing'!

codePage

    ^ codePageHolder value

!

codePage:pageNr

    codePageHolder value:pageNr.

!

codePageHolder

    ^ codePageHolder

!

selectedCodePoint

    ^ selectedCodePointHolder value

!

selectedCodePointHolder

    ^ selectedCodePointHolder

! !

!CharacterSetView methodsFor:'change & update'!

update:something with:aParameter from:changedObject

    something == #font ifTrue:[

        self font:(masterViewOrNil font).

        ^ self.

    ].

    super update:something with:aParameter from:changedObject

! !

!CharacterSetView methodsFor:'drawing'!

redraw

    |wCol hRow dY|

    wCol := width / 16.

    hRow := height / 16.

    dY := (hRow - (font height)) // 2 + (font ascent).

    0 to:15 do:[:row |

        |y0 y1 y rowBase|

        rowBase := row * 16r10.

        y := y0 := row * hRow.

        y := y rounded asInteger.

        y := y + dY.

        y1 := (row+1) * hRow.

        y1 := y1 rounded asInteger.

        0 to:15 do:[:col |

            |x0 x1 x codePoint s|

            codePoint := (self codePage * 16r100) + (rowBase + col).

            s := (Character value:codePoint) asString.

            x := x0 := (col * wCol) rounded asInteger.

            x := x rounded asInteger.

            x := x + (wCol / 2).

            x := x - ((font widthOf:s) // 2).

            x1 := ((col+1) * wCol) rounded asInteger.

            x1 := x1 rounded asInteger.

            codePoint == self selectedCodePoint ifTrue:[

                self paint:(Color red).

                self fillRectangle:((x0+1)@(y0+1) corner:(x1)@(y1)).

                self paint:(Color white).

                self displayString:s x:x y:y.

                self paint:(Color black).

            ] ifFalse:[

                self displayString:s x:x y:y.

            ].

        ].

    ].

    0 to:16 do:[:col |

        |x|

        x := (col * wCol) rounded asInteger.

        self displayLineFromX:x y:0 toX:x y:height-1.

    ].

    0 to:15 do:[:row |

        |y|

        y := (row * hRow) rounded asInteger.

        self displayLineFromX:0 y:y toX:width y:y.

    ].

    "

     (self extent:300@600) open

    "

!

sizeChanged:how

    self clear.

    self redraw.

! !

!CharacterSetView methodsFor:'event handling'!

buttonPress:button x:x y:y

    |wCol hRow row col code|

    wCol := width / 16.

    hRow := height / 16.

    row := y // hRow.

    col := x // wCol.

    code := (self codePage*16r0100) + (row * 16) + col.

    selectedCodePointHolder value:code.

!

codePageChanged

    realized ifTrue:[

        self clear.

        self redraw.

    ].

!

keyPress:key x:x y:y

    |cp ncp|

    cp := selectedCodePointHolder value. 

    key == #CursorRight ifTrue:[

        ncp := (cp + 1).

    ].

    key == #CursorLeft ifTrue:[

        ncp := (cp - 1).

    ].

    key == #CursorDown ifTrue:[

        ncp := (cp + 16).

    ].

    key == #CursorUp ifTrue:[

        ncp := (cp - 16).

    ].

    ncp notNil ifTrue:[

        ncp >= 0 ifTrue:[

            ncp <= 16rFFFF ifTrue:[

                codePageHolder value:(ncp bitShift:-8).

                selectedCodePointHolder value:ncp.

            ]

        ].

        ^ self.

    ].

    super keyPress:key x:x y:y 

!

selectedCodePointChanged

    realized ifTrue:[

        self clear.

        self redraw.

    ].

! !

!CharacterSetView methodsFor:'initialization & release'!

destroy

    masterViewOrNil notNil ifTrue:[

        masterViewOrNil removeDependent:self.

        masterViewOrNil := nil.

    ].

    super destroy.

!

initialize

    super initialize.

    codePageHolder := 0 asValue.

    codePageHolder onChangeSend:#codePageChanged to:self.

    selectedCodePointHolder := ValueHolder new.

    selectedCodePointHolder onChangeSend:#selectedCodePointChanged to:self.

!

useSameFontAs:aView

    masterViewOrNil := aView.

    masterViewOrNil addDependent:self

! !

!CharacterSetView methodsFor:'queries'!

preferredExtent

    preferredExtent notNil ifTrue:[

        ^ preferredExtent

    ].

    ^ ((4 + font width + 4) * 16)

       @

      ((4 + font height + 4) * 16)

! !

!CharacterSetView class methodsFor:'documentation'!

version

! !