Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!seismo!topaz!nike!ucbcad!ucbvax!hplabs!tektronix!tekcrl!tekchips!messick From: messick@tekchips.UUCP (Steve Messick) Newsgroups: net.lang.st80 Subject: Grapher (part 2) Message-ID: <506@tekchips.UUCP> Date: Mon, 28-Jul-86 20:43:26 EDT Article-I.D.: tekchips.506 Posted: Mon Jul 28 20:43:26 1986 Date-Received: Tue, 29-Jul-86 18:59:32 EDT Reply-To: messick@tekchips.UUCP (Steve Messick) Organization: Tektronix, Inc., Beaverton, OR. Lines: 1235 Grapher is a Smalltalk tool to display data structures. The distribution consists of two parts: PART 1 contains the files README and Grapher-2.st, PART 2 has only the file Grapher-1.st. See the README file for further information. ------------------------------ Grapher-1.st ------------------------------ ScrollController subclass: #XAxisScrollController instanceVariableNames: 'xScrollBar xMarker xSavedArea ' classVariableNames: '' poolDictionaries: '' category: 'Grapher'! XAxisScrollController comment: 'I represent control for scrolling using an x-axis scroll bar. I am a subclass of ScrollController that creates an x-axis scroll bar. My subclasses then have x and y-axis scroll bars. I keep control as long as the cursor is inside the view or either one of the scroll bars. The y-axis scroll bar is a rectangular area representing the length of the information being viewed. It contains an inner rectangle whose top y-coordinate represents the relative position of the information visible on the screen with respect to all of the information, and whose size represents the relative amount of that information visible on the screen. The user controls which part of the information is visible by pressing the red button. If the cursor is to the right of the inner rectangle, the windo w onto the visible information moves upward, if the cursor is to the left, the window moves downward, and if the cursor is inside, the inner rectangle is grabbed and moved to a desired position. The x-axis scroll bar is controlled in an analogous manner. Instance Variables: xScrollBar inside white, the outer rectangle xMarker inside gray, the inner rectangle xSavedArea

the area the xScrollBar overlaps, restored whenever the xScrollBar is hidden '! !XAxisScrollController methodsFor: 'initialize-release'! initialize super initialize. xScrollBar _ Quadrangle new. xScrollBar borderWidthLeft: 2 right: 2 top: 0 bottom: 2. xMarker _ Quadrangle new. xMarker insideColor: Form gray! ! !XAxisScrollController methodsFor: 'basic control sequence'! controlInitialize "The scrollbar has a two-pixel border, and for alignment it assumes that this sub-view has a one-pixel border and shares another one-pixel border from its neighbor/super view" super controlInitialize. xScrollBar region: (0 @ 0 extent: (view displayBox width + 2) @ 32). xMarker region: self computeXMarkerRegion. xScrollBar _ xScrollBar align: xScrollBar topLeft with: view displayBox bottomLeft - (1@0). xMarker _ xMarker align: xMarker leftCenter with: xScrollBar inside leftCenter. xSavedArea _ Form fromDisplay: xScrollBar. xScrollBar displayOn: Display. self moveXMarker! controlTerminate super controlTerminate. xSavedArea notNil ifTrue: [xSavedArea displayOn: Display at: xScrollBar topLeft. xSavedArea_ nil]! ! !XAxisScrollController methodsFor: 'control defaults'! controlActivity self xScrollBarContainsCursor ifTrue: [self xScroll] ifFalse: [super controlActivity]! isControlActive ^self xScrollBarContainsCursor or: [super isControlActive]! ! !XAxisScrollController methodsFor: 'scroll bar region'! repaintUnderScrollBar "Repaint the area under the scroll bar ." super repaintUnderScrollBar. self repaintUnderXScrollBar! repaintUnderXScrollBar "Repaint the area under the scroll bar ." xSavedArea notNil ifTrue: [xSavedArea displayOn: Display at: xScrollBar topLeft. xSavedArea_ nil]! ! !XAxisScrollController methodsFor: 'scrolling'! canXScroll "Answer whether there is information that is not visible and can be seen by scrolling." ^xMarker region width < xScrollBar inside width! scrollViewLeft "Scroll the receiver's view left the default amount." self xScrollView: self xScrollAmount negated! scrollViewNoDisplay: delta | t2 | delta ~= 0 ifTrue: [t2 _ (delta min: view window top - model boundingBox top) max: view window top - model boundingBox bottom. view scrollBy: 0 @ t2]! scrollViewRight "Scroll the receiver's view right the default amount." self xScrollView: self xScrollAmount! viewXDelta "Answer an integer that indicates how much the view should be scrolled. The scroll bar has been moved and now the view must be so the amount to scroll is computed as a ratio of the current scroll bar position." ^view window left - view boundingBox left - ((xMarker left - xScrollBar inside left) asFloat / xScrollBar inside width asFloat * view boundingBox width asFloat) rounded! xScroll "Check to see whether the user wishes to jump, scroll left, or scroll right." | savedCursor regionPercent | savedCursor _ sensor currentCursor. [self xScrollBarContainsCursor] whileTrue: [Processor yield. regionPercent _ 100 * (xScrollBar inside bottom - sensor cursorPoint y) // xScrollBar height. regionPercent <= 40 ifTrue: [self scrollLeft] ifFalse: [regionPercent >= 60 ifTrue: [self scrollRight] ifFalse: [self xScrollAbsolute]]]. savedCursor show! xScrollAmount "Answer the number of bits of x-coordinate should be scrolled. This is a default determination based on the view's preset display transformation." ^((view inverseDisplayTransform: sensor cursorPoint) - (view inverseDisplayTransform: xScrollBar inside leftCenter)) x! xScrollView "The scroll bar jump method was used so that the view should be updated to correspond to the location of the scroll bar gray area." self xScrollView: self viewXDelta! xScrollView: anInteger "If anInteger is not zero, tell the receiver's view to scroll by anInteger amount." anInteger ~= 0 ifTrue: [view scrollBy: ((anInteger min: view window left - view boundingBox left) max: view window left - view boundingBox right) @ 0. view clearInside. view display]! ! !XAxisScrollController methodsFor: 'cursor'! xMarkerContainsCursor "Answer whether the gray area inside the scroll bar area contains the cursor." ^xMarker inside containsPoint: sensor cursorPoint! xScrollBarContainsCursor "Answer whether the cursor is anywhere within the scroll bar area." ^xScrollBar inside containsPoint: sensor cursorPoint! ! !XAxisScrollController methodsFor: 'marker adjustment'! computeXMarkerRegion "Answer the rectangular area in which the gray area of the scroll bar should be displayed." ^0@0 extent: ((view window width asFloat / view boundingBox width * xScrollBar inside width) rounded min: xScrollBar inside width) @ 10! moveXMarker "The view window has changed. Update the xMarker." self moveXMarker: self xMarkerDelta negated! moveXMarker: anInteger "Update the xMarker so that is is translated by an amount corresponding to a distance of anInteger, constrained within the boundaries of the scroll bar." Display fill: xMarker mask: xScrollBar insideColor. xMarker _ xMarker translateBy: ((anInteger min: xScrollBar inside right - xMarker right) max: xScrollBar inside left - xMarker left) @ 0. xMarker displayOn: Display! xMarkerDelta ^xMarker left - xScrollBar inside left - ((view window left - view boundingBox left) asFloat / view boundingBox width asFloat * xScrollBar inside width asFloat) rounded! xMarkerRegion: aRectangle "Set the area defined by aRectangle as the xMarker. Fill it with gray tone." Display fill: xMarker mask: xScrollBar insideColor. xMarker region: aRectangle. xMarker _ xMarker align: xMarker leftCenter with: xScrollBar inside leftCenter! ! !XAxisScrollController methodsFor: 'private'! scrollLeft "This is modified from the original to provide continuous scrolling" self changeCursor: Cursor left. sensor anyButtonPressed ifTrue: [self canXScroll ifTrue: [self scrollViewLeft. self moveXMarker]]. sensor waitNoButton! scrollRight "This is modified from the original to provide continuous scrolling" self changeCursor: Cursor right. sensor anyButtonPressed ifTrue: [self canXScroll ifTrue: [self scrollViewRight. self moveXMarker]]. sensor waitNoButton! xAndYScrollAbsolute | oldMarker oldXMarker savedCursor | (((self canXScroll) or: [self canScroll]) and: [sensor redButtonPressed]) ifTrue: [savedCursor _ sensor currentCursor. self changeCursor: Cursor fourWay. [sensor redButtonPressed] whileTrue: [oldMarker _ marker. oldXMarker _ xMarker. marker _ marker translateBy: 0@((sensor cursorPoint y - marker center y min: scrollBar inside bottom - marker bottom) max: scrollBar inside top - marker top). xMarker _ xMarker translateBy: ((sensor cursorPoint x - xMarker center x min: xScrollBar inside right - xMarker right) max: xScrollBar inside left - xMarker left) @ 0. (oldMarker areasOutside: marker), (marker areasOutside: oldMarker), (oldXMarker areasOutside: xMarker), (xMarker areasOutside: oldXMarker) do: [:region | Display fill: region rule: Form reverse mask: Form gray]. self scrollViewNoDisplay: self viewDelta. self xScrollView. scrollBar display. xScrollBar display. self moveMarker. self moveXMarker]. savedCursor show]! xScrollAbsolute | oldMarker | self changeCursor: Cursor xMarker. self canXScroll & sensor anyButtonPressed ifTrue: [[sensor anyButtonPressed] whileTrue: [oldMarker _ xMarker. xMarker _ xMarker translateBy: ((sensor cursorPoint x - xMarker center x min: xScrollBar inside right - xMarker right) max: xScrollBar inside left - xMarker left) @ 0. (oldMarker areasOutside: xMarker), (xMarker areasOutside: oldMarker) do: [:region | Display fill: region rule: Form reverse mask: Form gray]]. self xScrollView. xScrollBar display. self moveXMarker]! ! XAxisScrollController subclass: #GraphHolderController instanceVariableNames: 'scrollBox selection selectionMenu ' classVariableNames: 'YellowButtonMenu ' poolDictionaries: '' category: 'Grapher'! GraphHolderController comment: 'As a subclass of XAxisScrollController I provide X and Y axis scrolling. In addition, I provide ''smooth'' scrolling by red button dragging of the mouse. I also am capable of responding to red button clicks to select an element of the display if I have a menu to activate for selections. The menu is initialized by my selectionMenu: message which takes an ActionMenu as its argument. The message selectors included with the ActionMenu must be messages that the objects which make up the graph respond to. My instance variables: scrollBox My scrollBox represents the area of the display which is visible on the screen. It is in local view coordinates. selection If an element of the display has been selected by clicking the mouse red button on it, it is saved here. selectionMenu The yellow button menu to be activated when a selection has been made and the yellow button is pressed. Menu messages are sent to the object field of the selected GraphNode. If selectionMenu is nil the window does not respond to red button clicks (although red button scrolling is still available). '! !GraphHolderController methodsFor: 'initialize-release'! initialize "I use an ActionMenu rather than a PopUpMenu so no yellowButtonMessages are needed." yellowButtonMenu _ YellowButtonMenu. scrollBox _ 0@0 extent: 0@0. super initialize! ! !GraphHolderController methodsFor: 'accessing'! scrollBox: aRectangle "My scrollBox is a Rectangle which pans over the virtual display of my model. My view looks through my scrollBox at the model. Normally, my window would perform this function, but windows get scaled and I required an unscaled scrollBox." scrollBox _ Rectangle origin: 0@0 extent: aRectangle extent! selection ^selection! selectionMenu: anActionMenu selectionMenu _ anActionMenu! ! !GraphHolderController methodsFor: 'basic control sequence'! controlInitialize selection == nil ifFalse: [self darkHighlightSelection]. super controlInitialize! controlTerminate selection == nil ifFalse: [self dimHighlightSelection]. super controlTerminate! ! !GraphHolderController methodsFor: 'control defaults'! controlActivity | cursorPoint xlate newSelection | sensor redButtonPressed ifTrue: [sensor leftShiftDown | (selectionMenu == nil) ifTrue: [^self xAndYScrollAbsolute]. cursorPoint _ (sensor cursorPoint translateBy: scrollBox origin - view displayTransformation translation - model offset) rounded. newSelection _ model selectNodeAt: cursorPoint. self setSelection: newSelection. newSelection == nil ifTrue: [self xAndYScrollAbsolute] ifFalse: [[sensor redButtonPressed & self isControlActive] whileTrue]]. super controlActivity! isControlActive ^sensor blueButtonPressed not and: [super isControlActive]! ! !GraphHolderController methodsFor: 'menu messages'! fileOutGraph "Produce a PostScript file which will make a hardcopy version of my model." | aStream | Cursor write showWhile: [aStream _ FileStream fileNamed: 'diagps.script'. model psStoreOn: aStream. aStream close]! localMenuItem: aSelector ^ #( #mvcInspect #fileOutGraph ) includes: aSelector! menuMessageReceiver selection == nil ifTrue: [^self] ifFalse: [sensor leftShiftDown ifTrue: [^selection] ifFalse: [^selection object]]! mvcInspect self controlTerminate. sensor leftShiftDown ifTrue: [view superView inspect] ifFalse: [view inspect]! yellowButtonActivity "Determine which item in the yellow button pop-up menu is selected. If one is selected, then send the corresponding message to the object designated as the menu message receiver." | index selector | yellowButtonMenu == nil ifFalse: [index _ yellowButtonMenu startUpYellowButton. index ~= 0 ifTrue: [selector _ yellowButtonMenu selectorAt: index. (self localMenuItem: selector) ifTrue: [self perform: selector] ifFalse: [self controlTerminate. selector numArgs = 1 ifTrue: [self menuMessageReceiver perform: selector with: model] ifFalse: [self menuMessageReceiver perform: selector]. self controlInitialize]]]! ! !GraphHolderController methodsFor: 'marker adjustment'! computeMarkerRegion ^Rectangle origin: 0 @ 0 extent: 10 @ ((scrollBox height asFloat / view boundingBox height asFloat * scrollBar inside height) rounded min: scrollBar inside height)! computeXMarkerRegion ^Rectangle origin: 0 @ 0 extent: ((scrollBox width asFloat / view boundingBox width asFloat * xScrollBar inside width) rounded min: xScrollBar inside width) @ 10! markerDelta ^marker top - scrollBar inside top - (scrollBox top - view boundingBox top asFloat / view boundingBox height asFloat * scrollBar inside height asFloat) rounded! xMarkerDelta ^xMarker left - xScrollBar inside left - (scrollBox left - view boundingBox left asFloat / view boundingBox width asFloat * xScrollBar inside width asFloat) rounded! ! !GraphHolderController methodsFor: 'scrolling'! scrollAmount ^(sensor cursorPoint - scrollBar inside topCenter) y! scrollBy: amount scrollBox _ scrollBox translateBy: amount! scrollView: anInteger "If anInteger is not zero, scroll by anInteger amount." | min max amount | max _ view boundingBox top - scrollBox top min: 0. min _ view boundingBox bottom - scrollBox bottom max: 0. amount _ (anInteger negated max: max) min: min. amount ~= 0 ifTrue: [self scrollBy: 0 @ amount. view clearInside. view display]! scrollViewNoDisplay: anInteger | min max amount | max _ view boundingBox top - scrollBox top min: 0. min _ view boundingBox bottom - scrollBox bottom max: 0. amount _ (anInteger negated max: max) min: min. amount ~= 0 ifTrue: [self scrollBy: 0 @ amount]! scrollViewXY: aPoint | amount ymax ymin xmax xmin | ymax _ view boundingBox top - scrollBox top min: 0. ymin _ view boundingBox bottom - scrollBox bottom max: 0. xmax _ view boundingBox left - scrollBox left min: 0. xmin _ view boundingBox right - scrollBox right max: 0. amount _ Point x: ((aPoint x negated max: xmax) min: xmin) rounded y: ((aPoint y negated max: ymax) min: ymin) rounded. amount ~= (0@0) ifTrue: [self scrollBy: amount. view clearInside. view display]! viewDelta "Answer an integer that indicates how much the view should be scrolled. The scroll bar has been moved and now the view must be so the amount to scroll is computed as a ratio of the current scroll bar position." ^scrollBox top - view boundingBox top - ((marker top - scrollBar top) asFloat / scrollBar height asFloat * view boundingBox height asFloat) rounded! viewXDelta "Answer an integer that indicates how much the view should be scrolled. The scroll bar has been moved and now the view must be so the amount to scroll is computed as a ratio of the current scroll bar position." ^scrollBox left - view boundingBox left - ((xMarker left - xScrollBar left) asFloat / xScrollBar width asFloat * view boundingBox width asFloat) rounded! xScrollAmount ^(sensor cursorPoint - scrollBar inside leftCenter) x! xScrollView: anInteger "If anInteger is not zero, scroll by anInteger amount." | min max amount | max _ view boundingBox left - scrollBox left min: 0. min _ view boundingBox right - scrollBox right max: 0. amount _ (anInteger negated max: max) min: min. amount ~= 0 ifTrue: [self scrollBy: amount @ 0. view clearInside. view display]! ! !GraphHolderController methodsFor: 'displaying'! displayOn: aDisplayMedium transformation: aDisplayTransformation clippingBox: clippingBox rule: ruleInteger mask: halfTone | location | location _ aDisplayTransformation applyTo: scrollBox origin x negated @ scrollBox origin y negated. model form displayOn: aDisplayMedium at: location clippingBox: clippingBox rule: ruleInteger mask: halfTone. selection == nil ifFalse: [self darkHighlightSelection]! ! !GraphHolderController methodsFor: 'private'! darkHighlightSelection | selectBox | selectBox _ (selection boundingBox translateBy: selection offset + model offset + view displayTransformation translation - scrollBox origin) rounded. (selection form) displayOn: Display at: (selectBox origin) clippingBox: (selectBox intersect: view insetDisplayBox) rule: 12 mask: Form black! deHighlightSelection | selectBox | selectBox _ (selection boundingBox translateBy: selection offset + model offset + view displayTransformation translation - scrollBox origin) rounded. (selection form) displayOn: Display at: (selectBox origin) clippingBox: (selectBox intersect: view insetDisplayBox) rule: Form over mask: Form black! dimHighlightSelection | selectBox newForm | selectBox _ (selection boundingBox translateBy: selection offset + model offset + view displayTransformation translation - scrollBox origin) rounded. newForm _ selection form deepCopy. newForm fill: (newForm boundingBox) rule: Form under mask: Form lightGray. newForm displayOn: Display at: (selectBox origin) clippingBox: (selectBox intersect: view insetDisplayBox) rule: Form over mask: Form black! setSelection: aGraphNode "Set the currently selected node to aGraphNode and set the yellowButtonMenu." selection == nil ifFalse: [self deHighlightSelection]. selection _ aGraphNode. selection == nil ifTrue: [yellowButtonMenu _ YellowButtonMenu] ifFalse: [self darkHighlightSelection. yellowButtonMenu _ selectionMenu]! xAndYScrollAbsolute | savedCursor oldMarker oldXMarker cursorPoint delta | ((self canXScroll or: [self canScroll]) and: [sensor redButtonPressed]) ifTrue: [savedCursor _ sensor currentCursor. self changeCursor: Cursor fourWay. cursorPoint _ sensor cursorPoint. [sensor redButtonPressed and: [self isControlActive]] whileTrue: [[(sensor cursorPoint - cursorPoint) abs < (1@1) and: [sensor redButtonPressed]] whileTrue. delta _ cursorPoint. delta _ (cursorPoint _ sensor cursorPoint) - delta. self scrollViewXY: delta. self moveMarker. self moveXMarker]. savedCursor show]! ! "-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- "! GraphHolderController class instanceVariableNames: ''! !GraphHolderController class methodsFor: 'class initialization'! initialize "GraphController initialize." YellowButtonMenu _ ActionMenu labels: 'inspect\file out' withCRs selectors: #( #mvcInspect #fileOutGraph )! ! GraphHolderController initialize! View subclass: #GraphHolderView instanceVariableNames: '' classVariableNames: '' poolDictionaries: '' category: 'Grapher'! GraphHolderView comment: 'I provide a resizable View on graphical objects, without scaling the object. To do this I maintain the standard cooridinate transformations of View, but I use only a transformation with unit scaling for display purposes. Used as a subview of a StandardSystemView, I should be added via the addSubView:in:borderWidth: message to ensure proper rescaling during a resize operation. '! !GraphHolderView methodsFor: 'initialize-release'! release "If the #noform change protocol has been used, there is a circularity in the Graph so release it, too." model release. super release! ! !GraphHolderView methodsFor: 'window access'! defaultWindow ^model boundingBox! ! !GraphHolderView methodsFor: 'controller access'! defaultControllerClass ^GraphHolderController! ! !GraphHolderView methodsFor: 'display box access'! computeBoundingBox ^boundingBox _ model boundingBox! ! !GraphHolderView methodsFor: 'displaying'! display self isUnlocked ifTrue: [boundingBox _ nil. viewport _ nil. self controller scrollBox: self insetDisplayBox]. super display! displayView "We always want to see the Graph at unit scale." controller displayOn: Display transformation: self displayTransformation copy scaleOfOne clippingBox: self insetDisplayBox rule: Form over mask: Form black! ! !GraphHolderView methodsFor: 'updating'! update: how "Graph's change protocol includes #form and #noform. #form indicates that the view is actually displaying a Form and does not need to clear its inside during scrolling. #noform indicates that the Graph is being redisplayed each time the View scrolls, and the View must clear its inside before redisplaying the Graph. The boundingBox is always reset because the size of the Graph changed." how == #form ifTrue: [boundingBox _ nil. self insideColor: nil. ^self]. how == #noform ifTrue: [boundingBox _ nil. self insideColor: Form white. ^self]! ! !GraphHolderView methodsFor: 'model access'! erase "I replace the current model with a model constructed of the EmptyGraph." model isEmpty ifFalse: [ self replaceModel: (GraphHolder createEmpty)]! replaceModel: newModel "I replace the model in the view with a new model." self model: newModel. self update: #noform. self clearInside. self display! ! "-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- "! GraphHolderView class instanceVariableNames: ''! !GraphHolderView class methodsFor: 'instance creation'! openOn: roots label: labelString "Create a Graph viewing the DAG rooted in roots. Label the GraphView with labelString. The default lay out is horizontal. See the comment in GraphView class.open:label:menu:" self openOn: roots label: labelString format: #( #horizontal )! openOn: roots label: labelString format: formatSymbols "By default, Graph windows do not respond to mouse clicks (except for the yellow button menu)." self openOn: roots label: labelString format: formatSymbols menu: nil! openOn: roots label: labelString format: formatSymbols menu: anActionMenu "The default messages used to build a graph are #children and #graphLabel. #children returns a Colleciton of child nodes. #graphLabel returns a Text to be used as the label in the GraphView." self openOn: roots label: labelString format: formatSymbols menu: anActionMenu childrenMsg: #children labelMsg: #graphLabel! openOn: roots label: labelString format: formatSymbols menu: actionMenu childrenMsg: childrenMsg labelMsg: labelMsg self open: (self createModel: roots children: childrenMsg label: labelMsg format: formatSymbols) label: labelString menu: actionMenu! ! !GraphHolderView class methodsFor: 'private'! createModel: roots children: childrenMsg label: labelMsg format: formatSymbols | aGraph | aGraph _ GraphHolder createForestWithRoots: roots children: childrenMsg label: labelMsg. aGraph layout: formatSymbols. ^aGraph! open: aGraph label: labelString menu: anActionMenu "Open a scrollable, resizeable view displaying the data structure in aGraph. To make the elements sensitive to mouse clicks anActionMenu non nil. The message selected from the menu will be sent to the selected element. If anActionMenu is nil mouse clicks are ignored." | formView topView | formView _ self new model: aGraph. formView controller selectionMenu: anActionMenu. topView _ StandardSystemView new label: labelString. topView borderWidth: 1. topView insideColor: Form white. "formView is added as follows to ensure proper scaling of the view when the topView is resized (via 'frame')." topView addSubView: formView in: (0@0 extent: 1@1) borderWidth: 1. topView controller open! ! #('FourWay' 'LeftCursor' 'RightCursor' 'XMarkerCursor') do: [ :var | Cursor addClassVarName: var].! !Cursor class methodsFor: 'constants'! fourWay "Answer the instance of me that is the shape of four connected arrows." ^FourWay! ! !Cursor class methodsFor: 'constants'! left "Answer the instance of me that is the shape of an arrow facing to the left." ^LeftCursor! ! !Cursor class methodsFor: 'constants'! right "Answer the instance of me that is the shape of an arrow facing to the right." ^RightCursor! ! !Cursor class methodsFor: 'constants'! xMarker "Answer the instance of me that is displayed when thumb-scrolling on the x-axis." ^XMarkerCursor! ! !Cursor class methodsFor: 'class initialization'! initialize "Create all the standard cursors Cursor blank Cursor corner Cursor crossHair Cursor down Cursor execute Cursor fourWay Cursor left Cursor marker Cursor normal Cursor origin Cursor read Cursor right Cursor square Cursor up Cursor wait Cursor write Cursor xMarker" OriginCursor _ (Cursor extent: 16@16 fromArray: #( 2r1111111111111111 2r1111111111111111 2r1100000000000000 2r1100000000000000 2r1100000000000000 2r1100000000000000 2r1100000000000000 2r1100000000000000 2r1100000000000000 2r1100000000000000 2r1100000000000000 2r1100000000000000 2r1100000000000000 2r1100000000000000 2r1100000000000000 2r1100000000000000) offset: -2@-2). CornerCursor _ (Cursor extent: 16@16 fromArray: #( 2r0000000000000011 2r0000000000000011 2r0000000000000011 2r0000000000000011 2r0000000000000011 2r0000000000000011 2r0000000000000011 2r0000000000000011 2r0000000000000011 2r0000000000000011 2r0000000000000011 2r0000000000000011 2r0000000000000011 2r0000000000000011 2r1111111111111111 2r1111111111111111) offset: -14@-14). ReadCursor _ (Cursor extent: 16@16 fromArray: #( 2r0000110000000110 2r0001001000001001 2r0001001000001001 2r0010000000010000 2r0100000000100000 2r1111101111100000 2r1000010000100000 2r1000010000100000 2r1011010110100000 2r0111101111000000 2r0 2r0 2r0 2r0 2r0 2r0) offset: 0@0). WriteCursor _ (Cursor extent: 16@16 fromArray: #( 2r0000000000000110 2r0000000000001111 2r0000000000010110 2r0000000000100100 2r0000000001001000 2r0000000010010000 2r0000000100100000 2r0000001001000011 2r0000010010000010 2r0000100100000110 2r0001001000001000 2r0010010000001000 2r0111100001001000 2r0101000010111000 2r0110000110000000 2r1111111100000000) offset: 0@0). WaitCursor _ (Cursor extent: 16@16 fromArray: #( 2r1111111111111111 2r1000000000000001 2r0100000000000010 2r0010000000000100 2r0001110000111000 2r0000111101110000 2r0000011011100000 2r0000001111000000 2r0000001111000000 2r0000010110100000 2r0000100010010000 2r0001000110001000 2r0010001101000100 2r0100111111110010 2r1011111111111101 2r1111111111111111) offset: 0@0). BlankCursor _ Cursor new. XeqCursor _ (Cursor extent: 16@16 fromArray: #( 2r1000000000010000 2r1100000000010000 2r1110000000111000 2r1111000111111111 2r1111100011000110 2r1111110001000100 2r1111111001111100 2r1111000001101100 2r1101100011000110 2r1001100010000010 2r0000110000000000 2r0000110000000000 2r0000011000000000 2r0000011000000000 2r0000001100000000 2r0000001100000000) offset: 0@0). SquareCursor _ (Cursor extent: 16@16 fromArray: #( 2r0 2r0 2r0 2r0 2r0 2r0000001111000000 2r0000001111000000 2r0000001111000000 2r0000001111000000 2r0 2r0 2r0 2r0 2r0 2r0 2r0) offset: -8@-8). NormalCursor _ (Cursor extent: 16@16 fromArray: #( 2r1000000000000000 2r1100000000000000 2r1110000000000000 2r1111000000000000 2r1111100000000000 2r1111110000000000 2r1111111000000000 2r1111100000000000 2r1111100000000000 2r1001100000000000 2r0000110000000000 2r0000110000000000 2r0000011000000000 2r0000011000000000 2r0000001100000000 2r0000001100000000) offset: 0@0). CrossHairCursor _ (Cursor extent: 16@16 fromArray: #( 2r0000000100000000 2r0000000100000000 2r0000000100000000 2r0000000100000000 2r0000000100000000 2r0000000100000000 2r0000000100000000 2r1111111111111110 2r0000000100000000 2r0000000100000000 2r0000000100000000 2r0000000100000000 2r0000000100000000 2r0000000100000000 2r0000000100000000 2r0) offset: -7@-7). MarkerCursor _ Cursor extent: 16@16 fromArray: #( 2r0 2r0 2r0 2r0000001000000000 2r0000001110000000 2r0000001111100000 2r1111111111111000 2r1111111111111110 2r1111111111111000 2r0000001111100000 2r0000001110000000 2r0000001000000000 2r0 2r0 2r0 2r0) offset: -7@-7. UpCursor _ Cursor extent: 16@16 fromArray: #( 2r1000000000000000 2r1100000000000000 2r1110000000000000 2r1111000000000000 2r1111100000000000 2r1111110000000000 2r1100000000000000 2r1100000000000000 2r1100000000000000 2r1100000000000000 2r1100000000000000 2r1100000000000000 2r1100000000000000 2r1100000000000000 2r1100000000000000 2r1100000000000000) offset: 0@-7. DownCursor _ Cursor extent: 16@16 fromArray: #( 2r0000110000000000 2r0000110000000000 2r0000110000000000 2r0000110000000000 2r0000110000000000 2r0000110000000000 2r0000110000000000 2r0000110000000000 2r0000110000000000 2r0000110000000000 2r1111110000000000 2r0111110000000000 2r0011110000000000 2r0001110000000000 2r0000110000000000 2r0000010000000000) offset: -5@-7. LeftCursor _ Cursor extent: 16@16 fromArray: #( 2r1111111111111111 2r0111111111111111 2r0011110000000000 2r0001110000000000 2r0000110000000000 2r0000010000000000 2r0000000000000000 2r0000000000000000 2r0000000000000000 2r0000000000000000 2r0000000000000000 2r0000000000000000 2r0000000000000000 2r0000000000000000 2r0000000000000000 2r0000000000000000) offset: -7@0. RightCursor _ Cursor extent: 16@16 fromArray: #( 2r0000000000100000 2r0000000000110000 2r0000000000111000 2r0000000000111100 2r1111111111111110 2r1111111111111111 2r0000000000000000 2r0000000000000000 2r0000000000000000 2r0000000000000000 2r0000000000000000 2r0000000000000000 2r0000000000000000 2r0000000000000000 2r0000000000000000 2r0000000000000000) offset: -7@-5. XMarkerCursor _ Cursor extent: 16@16 fromArray: #( 2r0 2r0000000100000000 2r0000000100000000 2r0000001110000000 2r0000001110000000 2r0000011111000000 2r0000011111000000 2r0000111111100000 2r0000111111100000 2r0001111111110000 2r0000001110000000 2r0000001110000000 2r0000001110000000 2r0000001110000000 2r0000001110000000 2r0000001110000000) offset: -7@-7. FourWay _ Cursor extent: 16@16 fromArray: #( 2r0000000100000000 2r0000001110000000 2r0000011111000000 2r0000111111100000 2r0001001110010000 2r0011001110011000 2r0111111111111100 2r1111111111111110 2r0111111111111100 2r0011001110011000 2r0001001110010000 2r0000111111100000 2r0000011111000000 2r0000001110000000 2r0000000100000000 2r0000000000000000) offset: -7@-7. "Cursor initialize"! ! Cursor initialize.!