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"
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COPYRIGHT (c) 1994 by Claus Gittinger
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All Rights Reserved
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This software is furnished under a license and may be used
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only in accordance with the terms of that license and with the
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inclusion of the above copyright notice. This software may not
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be provided or otherwise made available to, or used by, any
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other person. No title to or ownership of the software is
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hereby transferred.
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"
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49
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SimpleView subclass:#TabSpecRuler
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instanceVariableNames:'tabSpec titleEntry handleStyle handleCursor movedTabIndex
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movedTabX synchronousOperation handleWidth fixedTabs
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tabsAreVariable'
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classVariableNames:'DefaultHandleStyle'
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poolDictionaries:''
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category:'Views-Misc'
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!
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!TabSpecRuler class methodsFor:'documentation'!
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copyright
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"
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COPYRIGHT (c) 1994 by Claus Gittinger
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All Rights Reserved
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This software is furnished under a license and may be used
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only in accordance with the terms of that license and with the
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inclusion of the above copyright notice. This software may not
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be provided or otherwise made available to, or used by, any
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other person. No title to or ownership of the software is
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hereby transferred.
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"
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!
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36
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documentation
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"
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326
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It shows the tabulator positions of a TabulatorSpecification
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and allows its tab positions to be manipulated.
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(as shown in a FileBrowser, when the longList is enabled).
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[author]
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Claus Gittinger
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[see also:]
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TabulatorSpecification
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Ruler
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ListView
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"
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!
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examples
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"
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326
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[exBegin]
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|top head spec|
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top := View new.
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top extent:300@100.
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head := TabSpecRuler in:top.
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head width:1.0.
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head level:1.
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spec := TabulatorSpecification new.
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spec unit:#inch.
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spec positions:#(0 1 2.5 3.5 4 5 ).
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spec align: #(#left #left #right #right #center #decimal ).
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head tabulatorSpecification:spec.
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top open.
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[exEnd]
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"
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! !
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!TabSpecRuler class methodsFor:'defaults'!
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updateStyleCache
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DefaultHandleStyle := StyleSheet at:'tabRulerHandleStyle'.
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! !
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!TabSpecRuler methodsFor:'accessing'!
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fixedTabs
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"return the collection of tabIndices which are fixed;
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or nil, if all are variable"
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^ fixedTabs
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"Created: 28.3.1997 / 15:02:29 / cg"
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"Modified: 28.3.1997 / 15:03:05 / cg"
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!
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fixedTabs:something
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"set the collection of tabIndices which are fixed;
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nil, if all are to be variable"
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fixedTabs := something.
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"Created: 28.3.1997 / 15:02:29 / cg"
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"Modified: 28.3.1997 / 15:03:18 / cg"
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!
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synchronousOperation
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"return the synchronousOperation mode settings value"
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^ synchronousOperation
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"Created: 28.3.1997 / 15:01:17 / cg"
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"Modified: 28.3.1997 / 15:02:20 / cg"
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!
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synchronousOperation:something
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"set/clear synchronousOperation mode;
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if on, a move is immediately forwarded to dependents;
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of off, its forwarded when the mouse button is released."
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synchronousOperation := something.
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"Modified: 28.3.1997 / 15:02:07 / cg"
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!
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tabsAreVariable
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"return the value of the instance variable 'tabsAreVariable' (automatically generated)"
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^ tabsAreVariable
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"Created: 28.3.1997 / 15:05:27 / cg"
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!
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tabsAreVariable:something
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"set/clear movability of tabs. If false, tab positions are only
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displayed - but cannot be moved by the user.
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The default is true."
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tabsAreVariable := something.
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"Created: 28.3.1997 / 15:05:27 / cg"
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"Modified: 28.3.1997 / 15:06:19 / cg"
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!
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tabulatorSpecification:aTabSpec
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"set my tabulator specification"
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tabSpec := aTabSpec
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"Modified: 4.6.1996 / 22:34:31 / cg"
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! !
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!TabSpecRuler methodsFor:'event handling'!
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buttonMotion:state x:x y:y
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"mouse-button was moved while pressed;
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redraw thumb at its new position and, if scroll-mode is asynchronous,
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the scroll action is performed"
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|left right limit1 limit2 minSpacing newX|
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movedTabIndex notNil ifTrue:[
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minSpacing := 5.
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left := limit1 := 0.
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movedTabIndex > 1 ifTrue:[
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left := self positionOfTabAtIndex:(movedTabIndex-1).
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limit1 := left + minSpacing.
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].
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right := limit2 := width.
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movedTabIndex < tabSpec size ifTrue:[
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right := self positionOfTabAtIndex:(movedTabIndex+1).
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limit2 := right - minSpacing.
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].
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newX := (x max:limit1) min:limit2.
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x ~= newX ifTrue:[
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self cursor:Cursor stop.
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] ifFalse:[
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self cursor:handleCursor
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].
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newX ~= movedTabX ifTrue:[
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movedTabX := newX.
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self clearRectangleX:left+handleWidth y:0
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width:(right-left-handleWidth-handleWidth) height:height.
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self redrawTabAtIndex:movedTabIndex.
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synchronousOperation == true ifTrue:[
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self moveTabAtIndex:movedTabIndex toX:movedTabX
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]
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]
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] ifFalse:[
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(self canMoveTabAtX:x) ifTrue:[
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self cursor:handleCursor
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] ifFalse:[
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self cursor:(Cursor normal)
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]
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]
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"Modified: 28.3.1997 / 15:17:14 / cg"
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!
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buttonPress:button x:x y:y
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"mouse-button was pressed;
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start moving the tab"
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movedTabIndex := nil.
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(self canMoveTabAtX:x) ifTrue:[
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movedTabIndex := self indexOfTabAtX:x.
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self cursor:handleCursor.
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]
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"Modified: 28.3.1997 / 15:13:15 / cg"
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!
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buttonRelease:button x:x y:y
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"mouse-button was pressed;
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start moving the tab"
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|idx|
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idx := movedTabIndex.
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movedTabIndex := nil.
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idx notNil ifTrue:[
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synchronousOperation == true ifFalse:[
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self moveTabAtIndex:idx toX:movedTabX
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]
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]
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"Modified: 28.3.1997 / 15:10:23 / cg"
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!
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pointerLeave:state
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"mouse left view - restore cursor."
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self cursor:(Cursor normal).
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"Created: 28.3.1997 / 13:37:52 / cg"
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! !
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!TabSpecRuler methodsFor:'initialization'!
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initStyle
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super initStyle.
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handleStyle := DefaultHandleStyle.
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handleCursor := (VariablePanel cursorForOrientation:#horizontal) onDevice:device.
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self is3D ifTrue:[
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handleWidth := 2.
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] ifFalse:[
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handleWidth := 1
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]
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"Modified: 28.3.1997 / 14:35:23 / cg"
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!
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initialize
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super initialize.
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tabsAreVariable := true.
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self enableMotionEvents.
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self enableEnterLeaveEvents.
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self height:(font height + (2 * font descent)).
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"
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TabSpecRuler new open
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"
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326
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328
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"Modified: 28.3.1997 / 15:06:29 / cg"
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! !
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!TabSpecRuler methodsFor:'private'!
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canMoveTabAtX:x
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|idx|
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tabsAreVariable ifTrue:[
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(idx := self indexOfTabAtX:x) ~~ 0 ifTrue:[
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(fixedTabs notNil and:[fixedTabs includes:idx]) ifFalse:[
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^ true
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]
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]
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].
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^ false
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285 |
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"Created: 28.3.1997 / 15:12:05 / cg"
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"Modified: 28.3.1997 / 15:19:01 / cg"
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!
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indexOfTabAtX:x
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|xTab minDelta bestIndex|
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tabSpec isNil ifTrue:[^ 0].
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bestIndex := 0.
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1 to:tabSpec size do:[:i |
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xTab := tabSpec positionOfTab:i on:self.
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(x between:(xTab-5) and:(xTab+5)) ifTrue:[
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(minDelta isNil
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or:[(x - xTab) abs < minDelta]) ifTrue:[
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minDelta := (x - xTab) abs.
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bestIndex := i.
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]
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]
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].
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^ bestIndex
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307 |
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"Modified: 28.3.1997 / 13:43:47 / cg"
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328
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"Created: 28.3.1997 / 15:12:09 / cg"
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326
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!
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311 |
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moveTabAtIndex:idx toX:movedTabX
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328
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|unitPosition|
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326
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328
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unitPosition := (tabSpec unitsPerPixelOn:self) * movedTabX.
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tabSpec moveTabAtIndex:idx to:unitPosition.
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317 |
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"Modified: 28.3.1997 / 14:54:58 / cg"
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29
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! !
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320 |
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200
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321 |
!TabSpecRuler methodsFor:'redrawing'!
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322 |
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drawHandleAtX:x type:handleType
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"redraw a tabulator handle"
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326
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self paint:Black.
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self displayLineFromX:x y:0 toX:x y:height - 1.
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self is3D ifTrue:[
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self paint:White.
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self displayLineFromX:x+1 y:0 toX:x+1 y:height - 1
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]
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200
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332 |
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326
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"Modified: 28.3.1997 / 14:35:48 / cg"
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334 |
!
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335 |
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positionOfTabAtIndex:idx
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328
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^ ( tabSpec positionOfTab:idx on:self ) rounded.
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326
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338 |
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339 |
"Created: 28.3.1997 / 14:26:28 / cg"
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328
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340 |
"Modified: 28.3.1997 / 15:14:03 / cg"
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200
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341 |
!
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29
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342 |
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200
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redraw
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344 |
"redraw the handles from by tabSpec"
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345 |
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326
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tabSpec isNil ifTrue:[^ self].
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347 |
shown ifFalse:[^ self].
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348 |
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349 |
1 to:tabSpec size do:[:idx |
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350 |
self redrawTabAtIndex:idx.
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|
351 |
]
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352 |
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|
353 |
"Modified: 28.3.1997 / 13:58:26 / cg"
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354 |
!
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355 |
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356 |
redrawTabAtIndex:idx
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357 |
"redraw a single handle"
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358 |
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200
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359 |
|x|
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360 |
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361 |
tabSpec isNil ifTrue:[^ self].
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326
|
362 |
idx == movedTabIndex ifTrue:[
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363 |
x := movedTabX
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|
364 |
] ifFalse:[
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365 |
x := self positionOfTabAtIndex:idx.
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366 |
].
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367 |
self drawHandleAtX:x type:(tabSpec typeOfTab:idx).
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200
|
368 |
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326
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369 |
"Created: 28.3.1997 / 13:57:54 / cg"
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|
370 |
"Modified: 28.3.1997 / 14:26:36 / cg"
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29
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371 |
! !
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372 |
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200
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373 |
!TabSpecRuler class methodsFor:'documentation'!
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374 |
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375 |
version
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328
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376 |
^ '$Header: /cvs/stx/stx/libwidg2/TabSpecRuler.st,v 1.9 1997-03-28 14:20:59 cg Exp $'
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200
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377 |
! !
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