"

 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.

"

"{ Package: 'stx:libwidg2' }"

SimpleView subclass:#DSVLabelView

	instanceVariableNames:'dataSet lineDrag columns selection enabled preferredHeight

		handleCursor tabSpacing opaqueColumnResize verticalLabelSpacing'

	classVariableNames:''

	poolDictionaries:''

	category:'Views-DataSet'

!

Object subclass:#LineDrag

	instanceVariableNames:'topX topY botY column minX startX transX topView color'

	classVariableNames:''

	poolDictionaries:''

	privateIn:DSVLabelView

!

!DSVLabelView 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

"

    shows the labels assigned to the column descriptions. 

    Used as the title-part of a DataSetView.

    [Instance variables:]

        dataSet         <DSVColumnView>         column view which shows the columns

        selection       <Integer or nil>        current selected index or nil.

        enabled         <Boolean>               if a press action exists on a column

                                                entry, this action could be enabled or

                                                disabled.

        preferredHeight <Integer>               the preferred height of the labelView

    [author:]

        Claus Atzkern

    [see also:]

        DSVColumnView

        DataSetColumnSpec

        DataSetColumn

        DataSetView

"

! !

!DSVLabelView class methodsFor:'accessing'!

tabSpacing

    "returns the tab spacing

    "

    ^ 2

! !

!DSVLabelView class methodsFor:'defaults'!

defaultFont

    ^ DSVColumnView defaultFont

! !

!DSVLabelView methodsFor:'accessing'!

columns:aListOfColumns

    "the list of columns changed"

    aListOfColumns = columns ifTrue:[^ self].

    columns         := aListOfColumns.

    preferredHeight := nil.

    selection       := nil.

    self changed:#columnLayout.

!

opaqueColumnResize

    ^ opaqueColumnResize

!

opaqueColumnResize:aBoolean

    opaqueColumnResize := aBoolean

! !

!DSVLabelView methodsFor:'drawing'!

invalidate

    (shown) ifTrue:[

        super invalidate

    ]

!

invalidateItemAt:anIndex

    "invalidate rectangle assigned to an item at an index

    "

    |cL xL xR hg|

    (shown) ifTrue:[

        cL := columns at:anIndex ifAbsent:[^ nil].

        xL := self xVisibleOfColNr:anIndex.

        xR := xL + cL width.

        (xL < width and:[xR > 0]) ifTrue:[

            xL := xL max:0.

            xR := xR min:width.

            hg := height - margin - margin.

            self invalidate:(Rectangle left:xL top:margin width:(xR - xL) height:hg)

        ]

    ]

!

redrawColumnsInX:x y:y width:w height:h

    "redraw a rectangle

    "

    |savClip bg fg fgColor bgColor

     inset  "{ Class:SmallInteger }"

     maxX   "{ Class:SmallInteger }"

     lblH  "{ Class:SmallInteger }"

     wt     "{ Class:SmallInteger }"

     x1     "{ Class:SmallInteger }"

     x0     "{ Class:SmallInteger }"

    |

    (shown) ifFalse:[^ self].

    bgColor := dataSet backgroundColor.

    self paint:bgColor.

    self fillRectangleX:x y:y width:w height:h.

    columns isEmpty ifTrue:[^ self].

    fgColor := dataSet foregroundColor.

    inset   := dataSet horizontalSpacing + 1.

    maxX    := (x + w) min:(width - margin).

    lblH    := height - margin - margin.

    savClip := clipRect.

    x1 := self xVisibleOfColNr:1.

    columns keysAndValuesDo:[:aKey :aCol| |anItem|

        anItem := aCol label.

        wt := aCol width.

        x0 := x1.

        x1 := x1 + wt.

        (x1 > x and:[x0 < maxX]) ifTrue:[

            |left right rect|

            left  := x0 max:x.

            right := x1 min:maxX.

            rect  := Rectangle left:left top:y width:(right - left) height:h.

            clipRect := nil.

            self clippingRectangle:rect.

            fg := (anItem foregroundColor) ? fgColor.

            (bg := anItem backgroundColor) notNil ifTrue:[

                bg ~= bgColor ifTrue:[

                    self paint:bg.

                    self fillRectangleX:x0 y:margin width:wt height:lblH.

                ]

            ] ifFalse:[

                bg := bgColor

            ].

            self   paint:fg on:bg.            

            anItem redrawX:x0 w:wt h:height inset:inset on:self.

        ]

    ].

!

redrawEdgesX:x y:yTop width:aWidth height:aHeight

    "redraw the edges in the range

    "

    |desc startOfTabX endOfTabX lastColumn has3Dseparators separatorOneDColor

     maxX "{ Class:SmallInteger }"

     h    "{ Class:SmallInteger }"

     x1   "{ Class:SmallInteger }"

     x0   "{ Class:SmallInteger }"

     y0   "{ Class:SmallInteger }"

     absLabelLevel

    |

    maxX := (x + aWidth) min:(width - margin).

    absLabelLevel := 1.

    x1   := self xVisibleOfColNr:1.

    y0 := margin.

    h  := height - margin - margin.

    has3Dseparators    := dataSet has3Dseparators.

    separatorOneDColor := dataSet separatorOneDColor.

    lastColumn         := columns last.

    columns keysAndValuesDo:[:aKey :aCol|

        desc := aCol description.

        x0   := x1.

        x1   := x1 + aCol width.

        endOfTabX := nil.

        aKey == selection ifTrue:[

            startOfTabX notNil ifTrue:[ endOfTabX := x0 ].

            (x1 > x and:[x0 < maxX]) ifTrue:[

                dataSet drawEdgesAtX:x0 y:y0 width:(x1 - x0) height:h level:-1 on:self.

            ].

        ] ifFalse:[

            desc labelHasButtonLayout ifTrue:[

                startOfTabX isNil ifTrue:[ startOfTabX := x0 ].

                (desc== lastColumn or:[desc labelIsPartOfGroup not]) ifTrue:[

                    endOfTabX := x1.

                ]

            ] ifFalse:[

                startOfTabX notNil ifTrue:[

                    endOfTabX := x0.

                ].

            ].

        ].

        endOfTabX notNil ifTrue:[

            startOfTabX isNil ifTrue:[ startOfTabX := x0 ].

            startOfTabX < endOfTabX ifTrue:[

                (endOfTabX > x and:[startOfTabX < maxX]) ifTrue:[

                    has3Dseparators ifTrue:[

                        dataSet drawEdgesAtX:startOfTabX y:y0 width:(endOfTabX - startOfTabX) height:h level:absLabelLevel on:self.

                    ] ifFalse:[

                        self paint:separatorOneDColor.

                        self displayLineFromX:endOfTabX-1 y:0 toX:endOfTabX-1 y:h.

                    ].

                ].

            ].

            startOfTabX := nil.

        ].

    ].

    has3Dseparators ifTrue:[

        x1 < (maxX - absLabelLevel - absLabelLevel - 3) ifTrue:[

            dataSet

                drawEdgesAtX:x1 y:y0

                width:(width"-margin"-x1"-absLabelLevel") height:h

                level:absLabelLevel on:self

        ].

    ] ifFalse:[

        h := h - 1.

        self paint:separatorOneDColor.

        self displayLineFromX:x y:h toX:(x + aWidth) y:h.

    ].

!

redrawX:x y:y width:wArg height:h

    |savClip w|

    (shown) ifFalse:[^ self].

    w := wArg.

    self redrawColumnsInX:x y:y width:w height:h.

    super redrawX:x y:y width:w height:h.

"/    (x + w) >= (width-margin) ifTrue:[

"/        w := (width-margin) - 1 - x.

"/    ].

    columns notEmpty ifTrue:[

        savClip := clipRect.

        self clippingRectangle:(Rectangle left:x top:margin width:w height:height-margin-margin).

        self redrawEdgesX:x y:y width:w height:h.

        self clippingRectangle:savClip.

    ]

! !

!DSVLabelView methodsFor:'enumerating columns'!

columnsDo:aOneArgBlock 

    "evaluate the argument, aOneArgBlock for every column"

    columns do:aOneArgBlock

! !

!DSVLabelView methodsFor:'event handling'!

buttonMotion:state x:x y:y

    "mouse-button was moved;

     redraw thumb at its new position and, if scroll-mode is asynchronous, 

     the scroll action is performed

    "

    |colNr x1 col|

    state = 0 ifTrue:[

        lineDrag := nil.

    ].

    lineDrag notNil ifTrue:[

        (opaqueColumnResize ? (UserPreferences current opaqueTableColumnResizing == true)) ifTrue:[

            lineDrag moveToX:x.      

            dataSet changeWidthOfColumn:lineDrag column deltaX:lineDrag deltaX.

            lineDrag resetDeltaX.    

        ] ifFalse:[

            lineDrag invertLinesMovingToX:x.

        ].

        ^ self.

    ].

    "/ in the resize area ?

    colNr := self xVisibleToColNr:(x-tabSpacing).

    colNr notNil ifTrue:[

        col := columns at:colNr.

        (col notNil and:[col isResizeable]) ifTrue:[

            x1 := self xVisibleOfColNr:(colNr + 1).

            (x between:(x1-tabSpacing) and:(x1+tabSpacing))

            "/ x + tabSpacing > x1 

            ifTrue:[

                self cursor:handleCursor.

                ^ self

            ].

        ].

    ].

    self cursor:(Cursor normal)

    "Modified: / 26-03-2007 / 15:20:27 / cg"

!

buttonPress:button x:x y:y

    "handle a button press event; checks whether the item under the mouse

     is selectable. If true, the selection is set to the item.

    "

    |x1 colNr col|

    (enabled and:[shown]) ifFalse:[

        ^ self

    ].

    "/ in the resize area ?

    colNr := self xVisibleToColNr:(x-tabSpacing).

    colNr notNil ifTrue:[

        col := columns at:colNr.

        col isResizeable ifTrue:[

            x1 := self xVisibleOfColNr:(colNr + 1).

            (x between:(x1-tabSpacing) and:(x1+tabSpacing)) ifTrue:[

                col := columns at:colNr ifAbsent:nil.

                self cursor:handleCursor.

                lineDrag := LineDrag new.

                lineDrag column:col

                              x:x

                              y:margin

                              h:(self height + dataSet height)

                           minX:(x1 - col width + col minimumRequiredWidth)

                             on:self.

                (opaqueColumnResize ? (UserPreferences current opaqueTableColumnResizing == true)) ifFalse:[

                    lineDrag invertLine.

                ].

                ^ self

            ]

        ]

    ].

    colNr := self xVisibleToColNr:x.

    colNr notNil ifTrue:[

        col := columns at:colNr.

        col label isSelectable ifTrue:[

            self invalidateItemAt:(selection := colNr)

        ].

    ].

    self cursor:(Cursor normal).

    "Modified: / 26-03-2007 / 15:21:00 / cg"

!

buttonRelease:button x:x y:y

    "handle a button press event; checks whether the item under the mouse

     is the selected item. If true, the application is informed.

    "

    |selected index column deltaX|

    self cursor:(Cursor normal).

    selection isNil ifTrue:[

        lineDrag notNil ifTrue:[

            (opaqueColumnResize ? (UserPreferences current opaqueTableColumnResizing == true)) ifFalse:[

                lineDrag invertLine.

                column   := lineDrag column.

                deltaX   := lineDrag deltaX.

                deltaX abs > 0 "2" ifTrue:[

                    dataSet changeWidthOfColumn:column deltaX:deltaX

                ]

            ].

            lineDrag := nil.

        ].

        ^ self

    ].

    index     := self xVisibleToSelectionIndex:x.

    selected  := index == selection.

    index     := selection.

    selection := nil.

    self invalidateItemAt:index.

    selected ifTrue:[

        (columns at:index) label sendClickMsgTo:(self application)

    ]

!

pointerLeave:state

    "mouse left view - restore cursor.

    "

    self sensor anyButtonPressed ifFalse:[

        self cursor:(Cursor normal)

    ].

!

xVisibleToColNr:x

    "returns the column number for a physical x position.

     Returns nil if x is behond the last column."

    |x0 x1|

    x1 := self xVisibleOfColNr:1.

    columns keysAndValuesDo:[:index :aCol|

        x0 := x1.

        x1 := x0 + aCol width.

        (x1 > x and:[x0 < x]) ifTrue:[

            ^ index

        ]

    ].

    ^ nil

    "Modified: / 26-03-2007 / 15:21:37 / cg"

! !

!DSVLabelView methodsFor:'focus handling'!

canTab

    ^ false

!

wantsFocusWithButtonPress

    "never wants the focus - view which keeps the labels

    "

    ^ false

! !

!DSVLabelView methodsFor:'help'!