"

 COPYRIGHT (c) 1995 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.

"

ObjectView subclass:#UIObjectView

	instanceVariableNames:'saveSelection inputView enableChannel undoHistory copiedExtent

	classVariableNames:''

	poolDictionaries:''

	category:'Interface-UIPainter'

!

Object subclass:#UndoHistory

	instanceVariableNames:'startIdentifier identifier painter history transaction enabled'

	classVariableNames:''

	poolDictionaries:''

	privateIn:UIObjectView

!

Object subclass:#Transaction

	instanceVariableNames:'identifier type text actions'

	classVariableNames:''

	poolDictionaries:''

	privateIn:UIObjectView::UndoHistory

!

!UIObjectView class methodsFor:'documentation'!

copyright

"

 COPYRIGHT (c) 1995 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

"

    buildIn view used by the UIPainter; it provides all services for creating, deleting

    moving and changing layouts of painted components on a canvas.

    [see also:]

        UIBuilder

        UIPainterView

    [author:]

        Claus Atzkern

"

! !

!UIObjectView class methodsFor:'conversion'!

asLayoutFrameFromView:aView

    "convert layout from aView to a frameLayout. On success the frameLayout is

     returned otherwise nil

    "

    |lF lO rF rO tF tO bF bO type layout newLyt|

    type   := self layoutType:aView.

    layout := aView geometryLayout.

    layout isNil ifTrue:[

        type == #Extent ifTrue:[

            layout := aView bounds asLayout

        ]

    ].

    (type isNil or:[layout isNil]) ifTrue:[

        ^ nil

    ].

    type == #LayoutFrame ifTrue:[

        ^ layout copy

    ].

    layout isLayout ifFalse:[

        type == #Rectangle ifTrue:[

            lO := layout left.

            tO := layout top.

            rO := layout right.

            bO := layout bottom.

        ] ifFalse:[

            lO := layout x.

            tO := layout y.

            rO := lO + aView extent x.

            bO := tO + aView extent y.

        ].

        ^ LayoutFrame leftFraction:0 offset:lO  rightFraction:0 offset:rO

                       topFraction:0 offset:tO bottomFraction:0 offset:bO

    ].

    lF := layout leftFraction.

    lO := layout leftOffset.

    tF := layout topFraction.

    tO := layout topOffset.

    bF := tF.

    bO := tO + aView extent y.

    rF := lF.

    rO := lO + aView extent x.

    newLyt := LayoutFrame leftFraction:lF offset:lO  rightFraction:rF offset:rO

                           topFraction:tF offset:tO bottomFraction:bF offset:bO.

    (    (type == #AlignmentOrigin)

     and:[layout leftAlignmentFraction ~~ 0

      or:[layout topAlignmentFraction  ~~ 0]]

    ) ifTrue:[

        |svRc prBd dlta|

        svRc := aView superView viewRectangle.

        prBd := aView preferredBounds.

        dlta := (  ((layout rectangleRelativeTo:svRc preferred:prBd) corner)

                 - ((newLyt rectangleRelativeTo:svRc preferred:prBd) corner)

                ) rounded.

        newLyt leftOffset:(lO + dlta x).

        newLyt rightOffset:(rO + dlta x).

        newLyt topOffset:(tO + dlta y).

        newLyt bottomOffset:(bO + dlta y).

    ].

  ^ newLyt.

    "Modified: 28.3.1997 / 19:52:48 / cg"

! !

!UIObjectView class methodsFor:'defaults'!

defaultGrid

    ^ 4 @ 4

!

gridShown

    ^ false

!

handleSize

    "size of blob drawn for handles"

    ^ 4

!

hitDelta

    ^ 4

! !

!UIObjectView class methodsFor:'queries'!

layoutType:aView

    "returns layout type of aView or nil

    "

    |layout spec superView|

    aView notNil ifTrue:[

        layout := aView geometryLayout.

        layout notNil ifTrue:[

            layout isLayout ifTrue:[

                layout isLayoutFrame        ifTrue:[ ^ #LayoutFrame ].

                layout isAlignmentOrigin    ifTrue:[ ^ #AlignmentOrigin ].

                layout isLayoutOrigin       ifTrue:[ ^ #LayoutOrigin ].

            ] ifFalse:[

                layout isRectangle          ifTrue:[ ^ #Rectangle ].

                layout isPoint              ifTrue:[ ^ #Point ].

            ]

        ] ifFalse:[

            (superView := aView superView) notNil ifTrue:[

                spec := superView specClass.

                spec canResizeSubComponents ifTrue:[

                    ^ #Extent

                ]

            ]

        ]

    ].

    ^ nil

    "Modified: 28.2.1997 / 13:02:16 / cg"

! !

!UIObjectView methodsFor:'accessing'!

enableChannel

    "returns the channel which keeps false if running test otherwise true

    "

  ^ enableChannel

!

gridAlign

    "returns state of aligning to grid

    "

    ^ aligning

!

gridAlign:aBool

    "change state of aligning to grid

    "

    aBool ifTrue:[self alignOn]

         ifFalse:[self alignOff]

!

gridParameters

    "used by defineGrid, and in a separate method for

     easier redefinition in subclasses. 

     Returns the grid parameters in an array of 7 elements,

     which control the appearance of the grid-pattern.

     the elements are:

        bigStepH        number of pixels horizontally between 2 major steps

        bigStepV        number of pixels vertically between 2 major steps

        littleStepH     number of pixels horizontally between 2 minor steps

        littleStepV     number of pixels vertically between 2 minor steps

        gridAlignH      number of pixels for horizontal grid align (pointer snap)

        gridAlignV      number of pixels for vertical grid align (pointer snap)

        docBounds       true, if document boundary should be shown

     if littleStepH/V are nil, only bigSteps are drawn.

    "

    ^ #(10 10 nil nil 10 10 false)

!

gridShown:aBool

    "change visibility of grid

    "

    aBool ifTrue:[self showGrid]

         ifFalse:[self hideGrid]

!

hideGrid

    "hide grid

    "

    gridShown ifTrue:[

        self withSelectionHiddenDo:[super hideGrid]

    ]

!

showGrid

    "show grid

    "

    self withSelectionHiddenDo:[super showGrid]

! !

!UIObjectView methodsFor:'accessing behavior'!

enabled

    ^ enableChannel value

!

enabled:aState

    "set the modification / test mode

    "

    (aState == enableChannel value) ifFalse:[

        aState ifFalse:[

            saveSelection := self selection.

            self select:nil.

            enableChannel value:aState.

            inputView unmap.

        ] ifTrue:[

            inputView raise.

            inputView realize.

            enableChannel value:aState.

            self select:saveSelection.

        ]

    ]

!

resetModification

    "set modification state to false

    "

    undoHistory resetModification

!

testMode

    "returns true if running test

    "

    ^ enableChannel value not

!

testMode:aBoolean

    "change test mode

    "

    self enabled:(aBoolean not)

! !

!UIObjectView methodsFor:'blocked'!

addObject:anObject

    "add the argument, anObject to the contents - with redraw

    "

    self halt

!

addObjectWithoutRedraw:anObject

    "add the argument, anObject to the contents - with redraw

    "

    self halt

! !

!UIObjectView methodsFor:'event handling'!

elementChangedSize:aView

    "some element has changed its size; collect them during selectionHiddenLevel 

     is on

    "

    selectionHiddenLevel ~~ 0 ifTrue:[

        setOfSuperViewsSizeChanged add:aView superView

    ] ifFalse:[

        aView superView sizeChanged:nil

    ]

!

exposeX:x y:y width:w height:h

    "handle an expose event from device; redraw selection

    "

    ]

!

keyPress:key x:x y:y

    "any key pressed

    "

    <resource: #keyboard ( #Delete #BackSpace #Cut #Copy #Paste ) >

    (key == #Cut or:[key == #Delete or:[key == #BackSpace]]) ifTrue: [

        ^ self deleteSelection

    ].

    key == #Copy  ifTrue:[ ^ self copySelection].

    key == #Paste ifTrue:[ ^ self pasteBuffer].

!

processEvent:anEvent

    "catch expose events for components, and redraw its handles after

     the redraw when this happens

    "

    (anEvent type == #damage and:[self isSelected:(anEvent view)]) ifTrue:[

        self showSelected:(anEvent view)

    ].

    ^ false.

!

sizeChanged:how

    "size of a view(s) changed