"{ Encoding: utf8 }"

"

 COPYRIGHT (c) 2019 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.

"

"{ Package: 'stx:libview2' }"

"{ NameSpace: Smalltalk }"

LayoutFrame subclass:#ConstrainedLayoutFrame

	instanceVariableNames:'minLeft maxLeft minRight maxRight minTop maxTop minBottom

		maxBottom'

	classVariableNames:''

	poolDictionaries:''

	category:'Graphics-Geometry'

!

!ConstrainedLayoutFrame class methodsFor:'documentation'!

copyright

"

 COPYRIGHT (c) 2019 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 me are like layoutFrames,

    with additional (optional) limits on the bounds.

    Useful to arrange for labels in a dialog to never become too large.

    [author:]

        Claus Gittinger

    [see also:]

        View

        LayoutFrame LayoutOrigin AlignmentOrigin Layout 

        Rectangle Point

"

! !

!ConstrainedLayoutFrame methodsFor:'accessing'!

maxBottom

    ^ maxBottom

!

maxBottom:something

    maxBottom := something.

!

maxLeft

    ^ maxLeft

!

maxLeft:pixels

    maxLeft := pixels.

!

maxRight

    ^ maxRight

!

maxRight:pixels

    maxRight := pixels.

!

maxTop

    ^ maxTop

!

maxTop:pixels

    maxTop := pixels.

!

minBottom

    ^ minBottom

!

minBottom:pixels

    minBottom := pixels.

!

minLeft

    ^ minLeft

!

minLeft:pixels

    minLeft := pixels.

!

minRight

    ^ minRight

!

minRight:pixels

    minRight := pixels.

!

minTop

    ^ minTop

!

minTop:pixels

    minTop := pixels.

! !

!ConstrainedLayoutFrame methodsFor:'computing'!

rectangleRelativeTo:superRectangle preferred:prefRectHolder

    "compute the rectangle represented by the receiver,

     given the superView's rectangle and the view's preferredExtent."

    |x1 y1 x2 y2 superWidth superHeight|

    x1 := x2 := superRectangle left.

    y1 := y2 := superRectangle top.

    leftOffset notNil ifTrue:[

        x1 := x1 + leftOffset value

    ].

    topOffset notNil ifTrue:[

        y1 := y1 + topOffset value

    ].

    rightOffset notNil ifTrue:[

        x2 := x2 + rightOffset value

    ].

    bottomOffset notNil ifTrue:[

        y2 := y2 + bottomOffset value

    ].

    leftFraction notNil ifTrue:[

        superWidth := superRectangle width.

        x1 := x1 + (superWidth * leftFraction value) 

    ].

    topFraction notNil ifTrue:[

        superHeight := superRectangle height.

        y1 := y1 + (superHeight * topFraction value) 

    ].

    rightFraction notNil ifTrue:[

        superWidth isNil ifTrue:[superWidth := superRectangle width].

        x2 := x2 + (superWidth * rightFraction value) 

    ].

    bottomFraction notNil ifTrue:[

        superHeight isNil ifTrue:[superHeight := superRectangle height].

        y2 := y2 + (superHeight * bottomFraction value) 

    ].

    (minLeft notNil and:[x1 < minLeft]) ifTrue:[

        x1 := minLeft.

    ].    

    (maxLeft notNil and:[x1 > maxLeft]) ifTrue:[

        x1 := maxLeft.

    ].    

    (minTop notNil and:[y1 < minTop]) ifTrue:[

        y1 := minTop.

    ].    

    (maxTop notNil and:[x1 > maxTop]) ifTrue:[

        y1 := maxTop.

    ].    

    (minRight notNil and:[x1 < minRight]) ifTrue:[

        x2 := minRight.

    ].    

    (maxRight notNil and:[x1 > maxRight]) ifTrue:[

        x2 := maxRight.

    ].    

    (minBottom notNil and:[y1 < minBottom]) ifTrue:[

        y2 := minBottom.

    ].    

    (maxBottom notNil and:[x1 > maxBottom]) ifTrue:[

        y2 := maxBottom.

    ].    

    ^ Rectangle left:x1 top:y1 right:x2 bottom:y2

    "

     |superRect1 superRect2 lF|

     superRect1 := 0@0 corner:100@100.

     superRect2 := 0@0 corner:400@100.

     lF := (ConstrainedLayoutFrame new).

     lF leftFraction:0.25 rightFraction:0.75

        topFraction:0.25 bottomFraction:0.75.

     lF rectangleRelativeTo:superRect1 preferred:(0@0 corner:30@30). 

     lF rectangleRelativeTo:superRect2 preferred:(0@0 corner:30@30). 

     lF maxLeft:70.   

     lF rectangleRelativeTo:superRect2 preferred:(0@0 corner:30@30). 

    "

    "Created: / 17-07-2019 / 10:02:08 / Claus Gittinger"

! !

!ConstrainedLayoutFrame class methodsFor:'documentation'!

version_CVS

    ^ '$Header$'

! !