Programming Guide - Actian

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TreeNode and Tree ClassesMaintenance MethodsNode Location MethodsTraversal MethodsAddNode MethodUse the following methods to maintain the tree:AddNodeAdds a node to the treeDeleteNodeDeletes a node from the treeUse the following methods to find nodes in a tree:NodeByNameFinds a node with a given name, or TextLabelNodeByKeyFinds a mode with a given key. When you add a node to a tree, you mayspecify a unique key. The NodeByKey method is useful when the nodes ina tree do not have a unique name, and the NodeByName method does notfind a unique node.The following methods let you traverse the entire tree:StartTraverseLets you traverse the entire treeNextNodeReturns the next node after you have started to traverse the treeStopTraverseStops the traverse operationThe AddNode method creates a node and adds it to the tree. It is the basicmethod for building a tree.This method has the following syntax:treenode = tree.AddNode(name = varchar(256),[keylabel = varchar(256),][relative = treenode,][relation = integer]);268 <strong>Programming</strong> <strong>Guide</strong>
Treeview FieldsThe AddNode method has one mandatory parameter, and three optionalparameters:name(Required) Specifies the node's TextLabel attributekeylabel(Optional) Lets you specify a unique string that is associated with the newnode. If you specify a key label, you may use the NodeByKey method tosearch for the node.relative(Optional) Specifies an existing node in the tree. If relative is not specifiedor is null, the new node becomes the root node of the tree; the old rootnode, if it exists, becomes a sibling of the new root node.relation(Optional) Specifies the relation of the new node to relative. The possiblevalues of relation are:TN_LASTCHILDSpecifies that the new node is the last child of relative. This is thedefault if relation is not specified.TN_FIRSTCHILDSpecifies that the new node is the first child of relativeTN_NEXTSIBLINGSpecifies that the new node is the next sibling of relativeThe AddNode method returns the newly created node.Treeview FieldsA tree view field presents the end user with a hierarchical list of items in a treestructure that can be expanded or collapsed. The Tree attribute of a treeviewfield is a tree object.Working with List Views and Tree Views 269
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Ingres OpenROAD ® 2006Programming
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ContentsChapter 1: Introduction 13I
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Using an Object-oriented Approach t
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How You Can Retrieve Array Informat
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Chapter 12: Managing Event Queues 3
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Chapter 17: Preprocessing Your 4GL
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Chapter 1: IntroductionThis section
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ConventionsConventionsThe following
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Your Support OptionsYour Support Op
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OpenROAD NamesThe rules for these n
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OpenROAD Names3. Enclosing field sc
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OpenROAD NamesThe following code ex
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VariablesThe following illustrates
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VariablesIn the first example, film
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VariablesOpenROAD checks references
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VariablesHow You Can Declare Dynami
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VariablesFor example, assume that y
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ExpressionsHowever, you cannot use
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ExpressionsThe general syntax for h
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ExpressionsCurSessionSpecifies, for
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ExpressionsString OperatorThe conca
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ExpressionsOperatorlikenot likeOper
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Expressions• You can use the esca
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ExpressionsBecause procedures can r
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System-defined FunctionsThis rule h
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System-defined FunctionsNameOperand
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System-defined FunctionsName Operan
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System-defined FunctionsNameshift(c
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System-defined FunctionsSome date f
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System-defined FunctionsThe followi
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System-defined FunctionsCount Funct
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System-defined FunctionsResult Data
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Chapter 3: Writing Scripts and Proc
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ScriptsDeclare local variables that
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ScriptsUserEventSpecifies a user ev
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ScriptsExample—Field and Menu Ite
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ProceduresOpenROAD lets you create
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ProceduresReturning from a Procedur
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ProceduresExample—Local Procedure
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Procedures4GL DataTypedatemoneyfloa
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Calling Procedures• In this call
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Calling ProceduresparameterAssigns
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How Procedure Handles Work (ProcHan
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Compiler LimitationsYou can avoid t
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How You Can Invoke FramesHow the Cu
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How You Can Invoke FramesHow You Ca
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How You Can Invoke FramesFor more i
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How You Can Invoke FramesFor exampl
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How You Can Invoke FramesIf the obj
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How You Can Invoke FramesHow You Ca
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How You Can Invoke Frames• Prompt
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How You Can Invoke FramesThe syntax
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How You Can Run Non-interactive App
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How You Can Reference ObjectsHow Yo
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How You Can Reference ObjectsHow Yo
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How You Can Reference ObjectsUse an
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Using an Object-oriented Approach t
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InheritanceClass RelationshipsYou c
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InheritanceYou can specify a user c
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InheritanceThe Terminate method is
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How You Can Create a User ClassWhen
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How You Can Create a User ClassHow
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How You Can Create a User Class3. G
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How You Can Create a User ClassTo e
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External ClassesHow You Can Use Ext
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External ClassesExample—ActiveX C
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How You Can Manipulate Objects Gene
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Overview of the OpenROAD System Cla
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How You Can Access a Database with
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How You Can Manage TransactionsHow
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How You Can Manage TransactionsDivi
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How You Can Manage TransactionsTo c
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How Programming for Multiple Sessio
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Handling Database ErrorsIn OpenROAD
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Handling Database ErrorsIf a databa
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Handling Database ErrorsFor example
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Handling Database Errorsbeginerr_no
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Arrays and Table Fields—Conceptua
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ArraysBecause an individual attribu
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ArraysDeclaring an array variable d
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ArraysThe following statement puts
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Arraysfor i = custtable.FirstRow to
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ArraysHow You Can Add Rows to an Ar
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Page 228 and 229: Table FieldsTable Fields and Associ
Page 230 and 231: Table FieldsThe following applicati
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Page 234 and 235: Table FieldsFor example, the follow
Page 236 and 237: Table Field OperationsTable Field C
Page 238 and 239: Table Field OperationsHow You Can U
Page 240 and 241: Table Field OperationsWhen you use
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Page 244 and 245: Table Field OperationsThe following
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Page 248 and 249: Table Field OperationsTableField Me
Page 250 and 251: Table Field OperationsFor example,
Page 252 and 253: Table Field OperationsControlling M
Page 254 and 255: CollectionsCollectionsA collection
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Page 258 and 259: Listview_Treeview_DemoImport the De
Page 260 and 261: Listview FieldsListview FieldsA lis
Page 262 and 263: Listview FieldsextensionSpecifies a
Page 264 and 265: Listview FieldsImageIndexSpecifies
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Page 270 and 271: Treeview FieldsHow You Can Build a
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Page 279 and 280: How You Can Work with ImagesThe fol
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Page 283 and 284: How You Can Work with ImagesThe Bit
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Page 287 and 288: How You Can Work with Text StringsD
Page 289 and 290: How You Can Work with Text StringsH
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Page 296 and 297: How You Can Call 3GL ProceduresIn t
Page 298 and 299: How You Can Use Exec 4GL Statements
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Page 308 and 309: Sample 3GL ProceduresExec 4GL and E
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Event-based ProgrammingThe followin
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Event-based ProgrammingEvent TypesT
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Event-based ProgrammingField Events
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Event-based ProgrammingBecause all
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Event-based ProgrammingThe followin
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Event-based ProgrammingThe resume s
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Event-based ProgrammingNote: The da
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Communicating Between OpenROAD Fram
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How You Can Communicate with an Ext
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How You Can Communicate Between Ope
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How You Can Communicate Between Ope
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Chapter 14: Creating Dynamic Frames
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How You Can Change Field and Frame
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How You Can Create and Modify Field
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How You Can Remove Fields Dynamical
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How You Can Declare a Composite Fie
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How You Can Manipulate Data in Dyna
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How You Can Manage Operations with
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How You Can Build a Frame Dynamical
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Dynamic Statements ConsiderationsDy
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How You Can Write an AssistantNote:
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How You Can Write an AssistantFirst
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How You Can Write an AssistantBecau
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How You Can Ensure Compatibility Be
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Chapter 17: Preprocessing Your 4GL
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PreprocessorGeneral Preprocessor St
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PreprocessorThe #define StatementTh
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Error ProcessingGuidelines for Usin
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Chapter 18: Debugging Your Applicat
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How You Can Test an ApplicationHow
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How You Can Use Break ConditionsTo
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How You Can Use Break Conditions3.
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How You Can Use Break ConditionsWay
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How You Can Use Break ConditionsSet
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How You Can Use Break Conditions•
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How You Can Use Break ConditionsMet
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How You Can Log Trace InformationDa
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How You Can Monitor a Running Appli
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How You Can Monitor a Running Appli
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How You Can Debug Database QueriesT
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How Debugging an Application WorksS
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How Debugging an Application WorksH
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How Debugging an Application WorksW
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How Debugging an Application WorksH
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How Debugging an Application WorksW
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How Debugging an Application WorksL
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How Debugging an Application WorksA
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Appendix A: SQL Syntax SummaryThis
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SQL Syntax Summarygrant all [privil
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OpenSQL Syntax SummaryOpenSQL Synta
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Operating System CommandsThe follow
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BitmapObject classThe BitmapObject
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external classAn external class def
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local variableLocal variables conta
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StringObject classThe StringObject
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Index'' ' (single quotation marks)c
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Attributesdefined • 28referencing
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using to copy data • 244using wit
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application threads • 444array di
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examining values • 473hexadecimal
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Gmoney • 51numeric list • 53pad
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Namesapplication • 21dynamic •
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ReadOps attributesettings • 243Re
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concat function • 54functions •
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event chains • 323event queue •
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