"
 COPYRIGHT (c) 1997 by Claus Gittinger / 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.
"



NoteBookView subclass:#UIGalleryView
	instanceVariableNames:'majorKey minorKeys minorKeysHolder'
	classVariableNames:''
	poolDictionaries:''
	category:'Interface-UIPainter'
!

View subclass:#Canvas
	instanceVariableNames:'dragMode clientSpecHolder inputView selection specification
		lastClickPoint menuSelector raiseMenuSelector uiBuilder'
	classVariableNames:''
	poolDictionaries:''
	privateIn:UIGalleryView
!

DropObject subclass:#DropSpec
	instanceVariableNames:''
	classVariableNames:''
	poolDictionaries:''
	privateIn:UIGalleryView::Canvas
!

!UIGalleryView class methodsFor:'documentation'!

copyright
"
 COPYRIGHT (c) 1997 by Claus Gittinger / 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
"
    implements a selection panel, keeping widgets which could be placed
    into other components by drag & drop or copy @ paste. The objects
    which are draged/droped must be kind of UISpecification's.
    The UISelectionPanel used by the UIPainter is implemented in this way.

    [author:]
        Claus Gittinger
        Claus Atzkern

    [see also:]
        UIPainter
        UISelectionPanel
"

!

examples
"
    opens a gallery

                                                                        [exBegin]
    |top sel|

    top := StandardSystemView new label:'gallery'; extent:500@300.
    sel := UIGalleryView origin:0.0 @ 0.0 corner:1.0 @ 1.0 in:top.

    sel labels:#(    'Buttons'
                     'Panels'
                     'Text'
                   ).

    sel minorKeys:#( #standardButtonToggle
                     #standardPanels
                     #standardText
                   ).

    sel majorKey:UISelectionPanel.
    top open.
                                                                        [exEnd]
"
! !

!UIGalleryView methodsFor:'accessing'!

builder
    "get the builder used to setup a window from a specification (or nil in case
     of using a new builder)
    "
  ^ canvas builder
!

builder:aBuilderOrNil
    "set the builder used to setup a window from a specification (or nil in case
     of using a new builder)
    "
    canvas builder:aBuilderOrNil
!

canvas:aCanvas
    ^ self

!

labels:listOfLabels minorKeys:listOfMinorKeys majorKey:aMajorKey
    "setup for labels, selectors and class provider
    "
    self labels:listOfLabels.
    minorKeys := listOfMinorKeys.
    majorKey  := aMajorKey.
!

majorKey
    "get the class providing the window specifications
    "
  ^ majorKey
!

majorKey:aKey
    "get the class providing the window specifications
    "
    (majorKey := aKey) notNil ifTrue:[
        aKey isBehavior ifFalse:[
            majorKey := Smalltalk at:aKey asSymbol
        ]
    ].
    self selection:nil
!

minorKeys
    "get the list of selector keys
    "
  ^ minorKeys
!

minorKeys:aListOfSelectors
    "set the list of selectors
    "
    minorKeys := aListOfSelectors.
    tabRaw selection:nil.
! !

!UIGalleryView methodsFor:'accessing holders'!

clientSpecHolder
    "get the holder which keeps the current selection or in case of
     no selection the specification under the cursor
    "
  ^ canvas clientSpecHolder
!

clientSpecHolder:aHolder
    "set the holder which keeps the current selection or in case of
     no selection the specification under the cursor
    "
    canvas clientSpecHolder:aHolder
!

menuSelector
    ^ canvas menuSelector
!

menuSelector:aSelector
    ^ canvas menuSelector:aSelector
!

minorKeysHolder
    "get the holder keeping the minor keys; the selectors to access
     specifications from a class associated with the majorKey.
    "
  ^ minorKeysHolder
!

minorKeysHolder:aValueHolder
    "set the holder keeping the minor keys; the selectors to access
     specifications from a class associated with the majorKey.
    "
    minorKeysHolder notNil ifTrue:[
        minorKeysHolder removeDependent:self. 
    ].

    (minorKeysHolder := aValueHolder) notNil ifTrue:[
        minorKeysHolder addDependent:self.
    ].
    self minorKeys:(minorKeysHolder value)
! !

!UIGalleryView methodsFor:'change & update'!

selectionChangedTo:something
    "selection changed
    "
    |specification selector selection application|

    selection := tabRaw listIndexOf:something.

    (selection notNil and:[minorKeys size >= selection]) ifTrue:[
        selector := minorKeys at:selection.

        (majorKey respondsTo:selector) ifTrue:[
            specification := majorKey perform:selector
        ] ifFalse:[
            (application := self application) notNil ifTrue:[
                Object messageNotUnderstoodSignal handle:[:ex|
                    (application class respondsTo:selector) ifTrue:[
                        specification := application class perform:selector
                    ]
                ] do:[
                    specification := application aspectFor:selector
                ]
            ]
        ]
    ].
    canvas specification:specification.

!

update
    self selectionChangedTo:(tabRaw selection).
!

update:something with:aParameter from:changedObject
    "one of my models changed its value
    "
    changedObject == minorKeysHolder ifTrue:[
        ^ self minorKeys:( minorKeysHolder value)
    ].
    super update:something with:aParameter from:changedObject.

! !

!UIGalleryView methodsFor:'initialization'!

destroy
    minorKeysHolder notNil ifTrue:[
        minorKeysHolder removeDependent:self. 
        minorKeysHolder := nil.
    ].
    super destroy.
!

initialize
    "setup default attributes
    "
    canvas := Canvas.

    super initialize.
    tabRaw action:[:something| self selectionChangedTo:something ].

! !

!UIGalleryView::Canvas methodsFor:'accessing'!

builder
    "get the builder used to setup a window from a specification (or nil in case
     of using a new builder)
    "
  ^ uiBuilder
!

builder:something
    "set the builder used to setup a window from a specification (or nil in case
     of using a new builder)
    "
    uiBuilder := something.
!

clientSpecHolder
    "get the holder which keeps the current selection or in case of
     no selection the specification under the cursor
    "
    ^ clientSpecHolder
!

clientSpecHolder:aHolder
    "set the holder which keeps the current selection or in case of
     no selection the specification under the cursor
    "
    (clientSpecHolder := aHolder) notNil ifTrue:[
        clientSpecHolder value:selection
    ].
!

menuSelector
    "return the value of the instance variable 'menuSelector' (automatically generated)"

    ^ menuSelector!

menuSelector:something
    "set the value of the instance variable 'menuSelector' (automatically generated)"

    menuSelector := something.!

specification
    "get current specification
    "
   ^ specification


!

specification:aSpecOrSpecArray
    "set a new specification
    "
    |builder|

    self selection:nil.

    self subViews copy do:[:aSubView|
        aSubView ~~ inputView ifTrue:[
            aSubView destroy
        ]
    ].

    aSpecOrSpecArray notNil ifTrue:[
        specification := UISpecification from:aSpecOrSpecArray.

        (specification respondsTo:#buildViewFor:in:) ifFalse:[
            specification := nil.
          ^ self
        ].
        builder := uiBuilder ? UIBuilder new.
        specification buildViewFor:builder in:self.

        subViews do:[:v|
            (v ~~ inputView and:[(self findSpecFor:v) notNil]) ifTrue:[
                v borderWidth:1.
            ]
        ].
        self shown ifTrue:[
            self realizeAllSubViews.
            inputView raise
        ]
    ] ifFalse:[
        specification := nil
    ]



! !

!UIGalleryView::Canvas methodsFor:'building'!

buildSpecFrom:aSpec
    "build spec out of spec
    "
    |spec comp coll|

    (aSpec notNil and:[aSpec canUIDrag]) ifFalse:[
        ^ nil
    ].

    spec := aSpec copy.

    (aSpec class supportsSubComponents and:[aSpec component notNil]) ifFalse:[
        ^ spec
    ].
    comp := aSpec component.
    spec component:nil.

    comp canUIDrag ifFalse:[
      ^ spec
    ].
    coll := OrderedCollection new.

    comp do:[:anEntry||spc|
        (spc := self buildSpecFrom:anEntry) notNil ifTrue:[
            coll add:spc
        ]
    ].
    coll isEmpty ifTrue:[
      ^ spec
    ].
    comp := comp copy.
    comp collection:coll.
    spec component:comp.
  ^ spec




! !

!UIGalleryView::Canvas methodsFor:'drag & drop'!

startDrag
    "start drag of selection
    "
    |dragObj spec name|

    spec := self findSpecFor:selection.

    spec notNil ifTrue:[
        spec := self buildSpecFrom:spec.
        name := spec className asString.
        name := name copyFrom:1 to:(name size - ('Spec' size) + 1). 
        name at:1 put:(name at:1) asLowercase.
        name at:(name size) put:$1.
        spec name:name.

        self showUnselected.
        dragObj := DropSpec for:selection specification:spec.
        self showSelected.
        DragAndDropManager startDrag:dragObj from:inputView.
    ]

! !

!UIGalleryView::Canvas methodsFor:'event handling'!

buttonMotion:state x:x y:y
    "start a drag on selection
    "
    |sensor|

    (lastClickPoint notNil and:[selection notNil]) ifTrue:[
        sensor := self sensor.
        sensor anyButtonPressed ifTrue:[
            (lastClickPoint dist:(x@y)) > 10.0 ifTrue:[
                ^ self startDrag
            ]
        ]
    ]


!

buttonPress:button x:x y:y
    "change selection
    "
    |application|

    button == 1 ifTrue:[
        lastClickPoint := Point x:x y:y.
        self selection:(self findObjectAtX:x y:y).
    ]  ifFalse:[
        lastClickPoint := nil.

        (menuSelector notNil and:[(application := self application) notNil]) ifTrue:[
            Object messageNotUnderstoodSignal handle:[:ex|
            ] do:[
                application aspectFor:menuSelector
            ]
        ]
    ]

!

exposeX:x y:y width:w height:h
    "handle an expose event from device; redraw selection
    "
    super exposeX:x y:y width:w height:h.

    (selection notNil and:[self sensor hasExposeEventFor:selection]) ifFalse:[
        self showSelected.
    ].


! !

!UIGalleryView::Canvas methodsFor:'initialization'!

initialize
    super initialize.

    inputView := InputView origin:0.0@0.0 extent:1.0@1.0 in:self.
    inputView eventReceiver:self.
    inputView enableButtonEvents.
    inputView enableButtonMotionEvents.
    inputView enableMotionEvents.


! !

!UIGalleryView::Canvas methodsFor:'searching'!

findObjectAtX:x y:y
    "find the origin/corner of the currentWidget
    "
    |point id p|

    point := Point x:x y:y.
    id    := inputView id.

    subViews do:[:v|
	|pX pY|

        v ~~ inputView ifTrue:[
            p := device translatePoint:point from:id to:(v id).
	    pX := p x.
	    pY := p y.
            (     pX >= 0 and:[pX <= v width
             and:[pY >= 0 and:[pY <= v height
             and:[(self findSpecFor:v) notNil]]]]
            ) ifTrue:[
                ^ v
            ]
        ]
    ].
  ^ nil


!

findSpecFor:anObject
    "returns subspec assigned to instance or nil
    "
    |name|

    anObject notNil ifTrue:[
        name := anObject name.

        specification do:[:aSpec|
            aSpec name = name ifTrue:[
                aSpec canUIDrag ifTrue:[^ aSpec]
                               ifFalse:[^ nil]
            ]
        ]
    ].
    ^ nil


! !

!UIGalleryView::Canvas methodsFor:'selection'!

handlesOf:aComponent do:aOneArgBlock
    "evaluate the block on each handle; the argument to the block
     is a rectangle
    "
    aComponent notNil ifTrue:[
        aOneArgBlock value:(aComponent origin       - (2@2) extent:6@6).
        aOneArgBlock value:(aComponent corner       - (1@1) extent:6@6).
        aOneArgBlock value:(aComponent topRight     - (1@2) extent:6@6).
        aOneArgBlock value:(aComponent bottomLeft   - (2@1) extent:6@6).
        aOneArgBlock value:(aComponent leftCenter   - (2@0) extent:6@6).
        aOneArgBlock value:(aComponent rightCenter  - (1@0) extent:6@6).
        aOneArgBlock value:(aComponent topCenter    - (0@2) extent:6@6).
        aOneArgBlock value:(aComponent bottomCenter - (0@1) extent:6@6).
    ]


!

selection:anObject
    "selection changed
    "
    |spec|

    selection ~~ anObject ifTrue:[
        self showUnselected.
        spec := self findSpecFor:anObject.

        spec notNil ifTrue:[
            selection := anObject.
            self showSelected
        ] ifFalse:[
            selection := nil
        ].
        clientSpecHolder notNil ifTrue:[
            clientSpecHolder value:spec
        ]
    ]


!

showSelected
    "show selected
    "
    self shown ifFalse:[^ self].

    selection notNil ifTrue:[
        self clippedByChildren:false.

        self handlesOf:selection do:[:aRectangle|
            self fillRectangle:aRectangle
        ].
        self clippedByChildren:true.
    ].


!

showUnselected
    "show unselected
    "
    |r currSel|

    (currSel := selection) isNil ifTrue:[
        ^ self
    ].
    selection := nil.
    self shown ifFalse:[^ self].

    self clippedByChildren:false.

    self handlesOf:currSel do:[:aRectangle|
        self clearRectangle:aRectangle
    ].
    self clippedByChildren:true.
    r := currSel bounds.

    subViews do:[:sv|
        |absOrg absFrame|

        sv ~~ inputView ifTrue:[
            (sv bounds intersects:r) ifTrue:[
                sv borderColor:(Color gray:5).
                sv borderColor:(Color black).

                sv withAllSubViewsDo:[:v|
                    v fill:v viewBackground.
                    v exposeX:0 y:0 width:9999 height:9999.
                ]
            ]
        ]
    ].
    selection := currSel.

! !

!UIGalleryView::Canvas::DropSpec class methodsFor:'instance creation'!

for:aView specification:aSpec
    "create drop object for a view derived from a specification
    "
    |point extent root device|

    device := aView device.
    root   := device rootView.
    extent := aView extent.
    point  := device translatePoint:0@0 from:(aView id) to:(root id).

    DisplayObject := nil.

    (point x > 0 and:[point y > 0]) ifTrue:[
        point := point + extent.
        (point x < root width and:[point y < root height]) ifTrue:[
            aView topView raise.
            device sync.
            aView invalidate.
            aView windowGroup processExposeEvents.
            DisplayObject := Image fromView:aView grab:false.
        ]
    ].
    DisplayObject isNil ifTrue:[
        DisplayObject := Form extent:extent depth:1.
        DisplayObject colorMap:(Array with:Color white with:Color black).
        DisplayObject fill:(Color colorId:0).
        DisplayObject paint:(Color colorId:1).
        DisplayObject displayRectangleX:0 y:0 width:aView extent x height:aView extent y.
    ].
    aSpec class == UISubSpecification ifTrue:[
        aSpec layout:(LayoutOrigin fromPoint:0@0)
    ].
  ^ self new theObject:aSpec

    "Modified: 26.7.1997 / 20:27:40 / cg"
! !

!UIGalleryView class methodsFor:'documentation'!

version
    ^ '$Header$'
! !