"
 COPYRIGHT (c) 1995 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.
"



View subclass:#ActiveHelpView
	instanceVariableNames:'myView shapeStyle'
	classVariableNames:''
	poolDictionaries:''
	category:'Interface-Help'
!

!ActiveHelpView class methodsFor:'documentation'!

copyright
"
 COPYRIGHT (c) 1995 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
"
    a bubbleHelp view.

    Instances of myself show up either as a comics-like talking
    view, or as a simple square popup. This is configured via the
    styleSheet; the default is simple-square. 
    To get the fancy comics style, add a resource 'activeHelpStyle' with 
    a symbol-value of #cartoon.
    However, be aware that some servers have performance problems with
    these view-shapes (or do not support shapes at all).
    Therefore, the default style is a rectangular popupView.

    [author:]
        Claus Gittinger

    [See also:]
        ActiveHelp
"
! !

!ActiveHelpView class methodsFor:'instance creation'!

for:someText
    "create a bubble-view for some text"

    |helpView textView|

    helpView := self new.

    textView := Label new.
    textView font:(helpView font onDevice:textView graphicsDevice).
    ^ (helpView withView:textView) contents:someText

    "
     |v|

     v := (ActiveHelpView for:'hello world\this is an ActiveHelpView' withCRs) shapeStyle:nil.
     v realize.
     Delay waitForSeconds:2.
     v destroy
    "

    "
     |v|

     v := (ActiveHelpView for:'hello world\this is an ActiveHelpView' withCRs) shapeStyle:#cartoon.
     v realize.
     Delay waitForSeconds:2.
     v destroy
    "

    "Modified: 28.6.1997 / 14:24:23 / cg"
!

with:aView
    "create a talking-view wrapping some other view"

    ^ self new withView:aView

    "
     (ActiveHelpView with:(TextView new)) realize
     (ActiveHelpView with:(TextView new)) open
     (ActiveHelpView with:(Button label:'ok')) open
    "

    "Modified: 27.4.1996 / 15:14:18 / cg"
! !

!ActiveHelpView methodsFor:'accessing'!

contents:someText
    "set the text"

    (myView isKindOf:Label) ifTrue:[
        myView label:someText asString.
        myView extent:(myView preferredExtent).
    ] ifFalse:[
        myView contents:someText.
    ].
    self resizeToFit

    "Modified: 27.4.1996 / 15:14:56 / cg"
!

shapeStyle:aStyleSymbol
    "set the shapeStyle
     currently, only nil, #cartoon or #cartoon2 are supported"

    shapeStyle := aStyleSymbol.
    self resizeToFit.
    self computeShape.

    "Created: 29.5.1996 / 15:39:41 / cg"
    "Modified: 28.6.1997 / 14:15:22 / cg"
!

withView:aView
    "set the component view"

    (aView isKindOf:Label) ifTrue:[
        aView viewBackground:viewBackground.
        aView backgroundColor:viewBackground.
    ].
    self addSubView:aView.
    myView := aView.
    myView borderWidth:0

    "Modified: 27.4.1996 / 15:16:46 / cg"
! !

!ActiveHelpView methodsFor:'initialization'!

initStyle
    "setup viewStyle specifics"

    <resource: #style (#'activeHelp.backgroundColor'
                       #'activeHelp.borderWidth'
                       #'activeHelp.style')>

    |bg|

    super initStyle.

    shapeStyle := styleSheet at:'activeHelp.style' default:nil.
    bg := styleSheet colorAt:'activeHelp.backgroundColor' default:nil.
    bg notNil ifTrue:[
        viewBackground := bg
    ] ifFalse:[
        shapeStyle == #cartoon ifTrue:[
            viewBackground := White
        ]
    ].

    borderWidth := styleSheet at:'activeHelp.borderWidth' default:1.

    "Modified: / 26.10.1997 / 17:02:09 / cg"
!

initialize
    super initialize.
    font := Font family:'helvetica' size:12.

    "Modified: 29.5.1996 / 15:37:40 / cg"
!

realize
    self create.
    self computeShape.
    self enableMotionEvents.
    self enableButtonMotionEvents.
    super open
! !

!ActiveHelpView methodsFor:'private'!

computeShape
    "compute the shape, based upon the size of my component view"

    |extent shapeForm borderForm y1 bw h w mirrorH mirrorV
     p1 p2 p3 pB1 pB2 pB3 offs hEll h2 w2 w8 w78|

    Display supportsArbitraryShapedViews ifTrue:[
        (shapeStyle == #cartoon) ifTrue:[
            extent := self extent.
            h := extent y.
            w := extent x.
            bw := 4.
            offs := 0.

            self corner x > device width ifTrue:[
                mirrorH := true.
                self origin:((self origin x - w) @ (self origin y)).
                offs := bw * 2.
            ] ifFalse:[
                mirrorH := false
            ].
            self corner y > device height ifTrue:[
                mirrorV := true.
                self origin:(self origin x @ (self origin y - h)).
            ] ifFalse:[
                mirrorV := false
            ].

            borderForm := Form width:w height:h.
            shapeForm := Form width:w height:h.
            borderForm fill:(Color noColor).
            shapeForm fill:(Color noColor).

            hEll := (h // 3 * 2).

            mirrorV ifTrue:[
                y1 := 0.
            ] ifFalse:[
                y1 := h // 4.
            ].

            borderForm fillArcX:0 y:y1 
                          width:w height:hEll
                           from:0 angle:360.

            myView origin:(width - myView width // 2) @ (y1 + ((hEll - myView height) // 2)).

            h2 := h // 2.
            w2 := w // 2.
            w8 := w // 8.
            w78 := w * 7 // 8.

            mirrorH ifTrue:[
                mirrorV ifTrue:[
                    p1 := w @ h. 
                    p2 := (w78 @ h2).
                    p3 := (w2 @ h2).
                    pB1 := (w-bw) @ (h-bw). 
                    pB2 := ((w78 - bw) @ (h2 - bw)).
                    pB3 := ((w2 + bw) @ (h2 - bw))
                ] ifFalse:[
                    p1 := w @ 0. 
                    p2 := (w78 @ h2).
                    p3 := (w2 @ h2).
                    pB1 := (w-bw) @ bw. 
                    pB2 := ((w78 - bw) @ (h2 + bw)).
                    pB3 := ((w2 + bw) @ (h2 + bw))
                ]
            ] ifFalse:[
                mirrorV ifTrue:[
                    p1 := 0@h. 
                    p2 := (w8 @ h2). 
                    p3 := (w2 @ h2).
                    pB1 := bw@(h-bw). 
                    pB2 := ((w8 + bw) @ (h2 - bw)). 
                    pB3 := ((w2 - bw) @ (h2 - bw)).
                ] ifFalse:[
                    p1 := 0@0. 
                    p2 := (w8 @ h2). 
                    p3 := (w2 @ h2).
                    pB1 := bw@bw. 
                    pB2 := ((w8 + bw) @ (h2 + bw)). 
                    pB3 := ((w2 - bw) @ (h2 + bw)).
                ]
            ].

            borderForm fillPolygon:(Array with:p1 with:p2 with:p3).
            shapeForm fillPolygon:(Array with:pB1 with:pB2 with:pB3).

            shapeForm lineWidth:bw.
            shapeForm paint:(Color noColor).
            shapeForm displayPolygon:(Array with:p3 with:p1 with:p2).

            shapeForm paint:(Color colorId:1).
            shapeForm fillArcX:bw y:y1 + bw 
                         width:(w - (bw * 2)) height:(h // 3 * 2 - (bw * 2))
                          from:0 angle:360.
        ].
        borderForm notNil ifTrue:[
            self borderShape:borderForm.
            self viewShape:shapeForm
        ].
    ]

    "Modified: / 5.6.1999 / 21:41:01 / cg"
!

resizeToFit
    "resize myself to make the component view fit"

    |h w pref|

    pref := myView preferredExtent.
    shapeStyle == #cartoon ifTrue:[
        h := pref y. 
        w := pref x. 
        self extent:((w / 0.85) rounded asInteger)
                     @ 
                    ((h * 4) rounded asInteger)
    ] ifFalse:[
        self extent:pref
    ]

    "Modified: 28.6.1997 / 14:23:49 / cg"
! !

!ActiveHelpView methodsFor:'queries'!

isPopUpView
    "return true - I am a popUp type of view (no decoration, pop-to-top)"

    ^ true

    "Modified: 12.5.1996 / 21:58:12 / cg"
! !

!ActiveHelpView class methodsFor:'documentation'!

version
    ^ '$Header: /cvs/stx/stx/libview2/ActiveHelpView.st,v 1.22 1999-08-18 15:14:38 cg Exp $'
! !