"

 COPYRIGHT (c) 1997 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.

"

Object subclass:#TabWidget

	instanceVariableNames:'model tabView label disabledLabel printableLabel anchor extent

		lineNr fgColor labelType'

	classVariableNames:''

	poolDictionaries:''

	category:'Views-Interactors'

!

	instanceVariableNames:''

	classVariableNames:''

	poolDictionaries:''

	privateIn:TabWidget

!

	instanceVariableNames:''

	classVariableNames:''

	poolDictionaries:''

	privateIn:TabWidget

!

!TabWidget class methodsFor:'documentation'!

copyright

"

 COPYRIGHT (c) 1997 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

"

    instances represent (& draw) the tabs of a tabWidget.

    [author:]

        Claus Atzkern

    [see also:]

        TabView

"

! !

!TabWidget class methodsFor:'instance creation'!

labels:aList for:aTabView

    "create tabs based on labels for a tabview

    "

    |list maxX maxY lftIns topIns level style|

    maxX   := 0.

    maxY   := 0.

    style  := aTabView style.

    lftIns := style at:#labelLeftInset.

    topIns := style at:#labelTopInset.

    level  := style at:#tabLevel.

    aTabView device isNil ifTrue:[

        self halt

    ].

    list := aList collect:[:anEntry||y x tab lbl|

        tab := self new label:anEntry for:aTabView.

        lbl := tab printableLabel.

        (y := lbl heightOn:aTabView) > maxY ifTrue:[maxY := y].

        (x := lbl  widthOn:aTabView) > maxX ifTrue:[maxX := x].

        tab

    ].

    style at:#labelMaxX put:maxX.

    style at:#labelMaxY put:maxY.

    maxY  := maxY + topIns

                  + (style at:#labelBottomInset)

                  + (2 * level).

    maxX := maxX + lftIns + (style at:#labelRightInset).

    style at:#maxX put:maxX.

    style at:#maxY put:maxY.

    style at:#labelAnchor put:( lftIns @ (topIns +level) ).

    self validateDimensions:style.

    maxY := style at:#maxY.

    maxX := style at:#maxX.

 "/ caused by vertical layout for images

    maxX < maxY ifTrue:[style at:#maxX put:maxY].

  ^ list

    "Modified: / 4.5.1999 / 02:15:33 / cg"

!

validateDimensions:aStyle

    "validate dimensions for a style; could be redifined

    "

! !

!TabWidget class methodsFor:'accessing'!

computeColorsOn:aView style:aStyle

    "set colors dependent on selection color

    "

    selectedColor   := aView viewBackground.

    unselectedColor := selectedColor lightened.

    avgSelectedColor := selectedColor averageColorIn:(0@0 corner:7@7).

    avgUnSelectedColor := unselectedColor averageColorIn:(0@0 corner:7@7).

    aStyle at:#unselectedColor    put:unselectedColor.

    aStyle at:#selectedColor      put:selectedColor.

    aStyle at:#labelColor         put:Color black.

    "Modified: / 4.5.1999 / 02:16:32 / cg"

!

computeColorsOn:aView style:aStyle selectionColor:aSelectedColor

    "set colors dependent on selection color

    "

    "/ CG: this seems to be no longer needed ...

    unselectedColor := aView viewBackground.

    selectedColor   := unselectedColor lightened.

    avgSelectedColor := selectedColor averageColorIn:(0@0 corner:7@7).

    avgUnSelectedColor := unselectedColor averageColorIn:(0@0 corner:7@7).

    aStyle at:#unselectedColor    put:unselectedColor.

    aStyle at:#selectedColor      put:selectedColor.

    aStyle at:#labelColor         put:Color black.

!

tabStyleOn:aView

    "returns default tab style

    "

    |style|

    style := IdentityDictionary new.

    style at:#widget put:self.

    self computeColorsOn:aView style:style.

    style at:#expandSelection    put:0@0.    "/ expand selection extent x y when raised

    style at:#tabLevel           put:0.      "/ level

    style at:#labelTopInset      put:4.      "/ additional top label inset

    style at:#labelBottomInset   put:4.      "/ additional bottom inset

    style at:#labelLeftInset     put:4.      "/ label left  inset

    style at:#labelRightInset    put:4.      "/ label right inset

    style at:#rightCovered       put:0.      "/ covers right tab for n pixels

  ^ style

    "Modified: / 4.5.1999 / 02:15:50 / cg"

!

widgetClass:aWidget

    |wdgt name|

    name := aWidget asString.

    wdgt := Smalltalk classNamed:( self name asString, '::', name ).

    wdgt notNil ifTrue:[

        ^ wdgt

    ].

    ^ Smalltalk classNamed:name

! !

!TabWidget methodsFor:'accessing'!

label

    ^ label

!

lineNr

    "returns line number

    "

    ^ lineNr

!

lineNr:aLineNr

    "change line number

    "

    lineNr := aLineNr

!

printableLabel

    |lbl dev|

    printableLabel notNil ifTrue:[

        ^ printableLabel

    ].

    model isNil ifTrue:[

        lbl := label

    ] ifFalse:[

        lbl := model rawLabel

    ].

    dev := tabView device.

    lbl isImage ifTrue:[

        labelType := #image.

        printableLabel := lbl onDevice:dev.

        disabledLabel  := printableLabel lightened onDevice:dev. 

    ] ifFalse:[

        labelType := #string.

        printableLabel := lbl ? ''.

        disabledLabel  := printableLabel copy.

        lbl class == LabelAndIcon ifTrue:[

            lbl := printableLabel icon onDevice:dev.

            printableLabel icon:lbl.

            disabledLabel  icon:(lbl lightened onDevice:dev). 

        ]

    ].

  ^ printableLabel

! !

!TabWidget methodsFor:'accessing dimensions'!

anchor

    "returns the tab origin

    "

    ^ anchor

!

anchor:anAnchor

    "change the tab anchor; no redraw

    "

    anchor := anAnchor

!

anchor:anAnchor extent:anExtent

    "change anchor and extent; no redraw

    "

    anchor := anAnchor.

    extent := anExtent.

!

extent

    "return the tab extent

    "

    ^ extent

!

extent:anExtent

    "change the tab extent; no redraw

    "

    extent := anExtent

!

preferredExtentX

    "returns my preferred extent x

    "

    ^    (tabView styleAt:#maxX)

       - (tabView styleAt:#labelMaxX)

       + (self printableLabel widthOn:tabView).

!

preferredExtentY

    "returns my preferred extent y

    "

    ^    (tabView styleAt:#maxY)

       - (tabView styleAt:#labelMaxY)

       + (self printableLabel heightOn:tabView).

! !

!TabWidget methodsFor:'basic drawing'!

redrawAtBottom:isSelected

    "redraw tab at bottom of view

    "

    ^ self subclassResponsibility

!

redrawAtLeft:isSelected

    "redraw tab at left of view

    "

    ^ self subclassResponsibility

!

redrawAtRight:isSelected

    "redraw tab at right of view

    "

    ^ self subclassResponsibility

!

redrawAtTop:isSelected

    "redraw tab at top of view

    "

    ^ self subclassResponsibility

! !

!TabWidget methodsFor:'change & update'!

labelChanged

    printableLabel := nil

! !

!TabWidget methodsFor:'drawing'!

redraw:isSelected

    "redraw tab

    "

    |direction|

    direction := tabView direction.

    direction == #top ifTrue:[

        self redrawAtTop:isSelected

    ] ifFalse:[

        direction == #bottom ifTrue:[

            self redrawAtBottom:isSelected

        ] ifFalse:[

            direction == #right ifTrue:[ self redrawAtRight:isSelected ]

                               ifFalse:[ self redrawAtLeft:isSelected ]

        ]

    ].

    self redrawLabel

!

redrawLabel

    "redraw label only

    "

    |fg direction origin originX originY anchor anchorX anchorY x y label|

    label     := self printableLabel.

    direction := tabView direction.

    anchor    := tabView styleAt:#labelAnchor.

    anchorX := anchor x.

    anchorY := anchor y.

    origin    := self computeOrigin.

    originX := origin x.

    originY := origin y.

 "/ set label color

    self printableLabel.

    self isEnabled ifTrue:[

        label := printableLabel.

        (model notNil and:[(fg := model foregroundColor) notNil]) ifTrue:[

            fgColor = fg ifFalse:[

            ].

            tabView paint:fgColor

        ] ifFalse:[

            tabView paintColor:#labelColor

        ]

    ] ifFalse:[

        label := disabledLabel.

        tabView paintColor:#shadowColorUnselected.

    ].

    (direction == #top or:[direction == #bottom]) ifTrue:[

        y := originY.

        x := originX + anchorX.

        direction == #top ifTrue:[

            y := y + anchorY.

        ] ifFalse:[

            y := y - anchorY - (label heightOn:tabView).

        ].

        labelType == #string ifTrue:[

            y := y + tabView fontAscent

        ].

    ] ifFalse:[

        direction == #right ifTrue:[

            x := originX - anchorY - (label heightOn:tabView).

        ] ifFalse:[

            x := originX + anchorY.

        ].

        y := originY + anchorX.

        labelType == #string ifTrue:[

            x := x + tabView fontDescent.

            "/ workaround for a bug in display-with-angle,

            "/ iff displayed string is a labelAndIcon.

            "/ (In this case, display is always opaque, and the current

            "/  backgroundPaint color is used to fill the underlying rectangle)

            "/

            tabView backgroundPaint:(tabView getBackgroundPaintForTab:self).

            tabView displayString:label x:x y:y angle:90.

          ^ self.

        ].

    ].

    label displayOn:tabView x:x y:y.

! !

!TabWidget methodsFor:'initialization'!

label:aLabel for:aTabView

    "initialize attributes

    "

    tabView := aTabView.

    label   := aLabel.

    model   := (label isKindOf:TabItem) ifTrue:[label] ifFalse:[nil]

! !

!TabWidget methodsFor:'private'!

computeCorner

    "compute corner

    "

    |d c|

    c := anchor + extent.

    d := tabView direction.

    d == #top    ifTrue:[^ ( c x @ (tabView extent y) )].

    d == #left   ifTrue:[^ ( (tabView extent x) @ c y ) ].

    d == #right  ifTrue:[^ ( 0 @ c y )].

    d == #bottom ifTrue:[^ ( c x @ 0 )].

    self error.

!

computeOrigin

    "compute origin

    "

    |d|

    d := tabView direction.

    d == #top    ifTrue:[ ^ anchor x @ ((tabView extent y) - anchor y) ].

    d == #left   ifTrue:[ ^ ((tabView extent x) - anchor x) @ anchor y ].

    d == #right  ifTrue:[ ^ anchor ].

    d == #bottom ifTrue:[ ^ anchor ].

    self error

! !

!TabWidget methodsFor:'queries'!

containsPoint:aPoint

    "return true, if a point is contained in the tab

    "

    |d origin 

     originX "{ Class: SmallInteger }"

     originY "{ Class: SmallInteger }"

     w       "{ Class: SmallInteger }"

     h       "{ Class: SmallInteger }"

     x       "{ Class: SmallInteger }"

     y       "{ Class: SmallInteger }"|