Programming Guide - Actian

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Treeview FieldsThe tree_ex2_class has the following attributes:fldSpecifies a formfield, the field that corresponds to the nodeoriginal_bgcolorSpecifies an integer, the original background color of the fieldcolor_changedSpecifies an integer, a flag to indicate that the background color waschangedThe fld attribute allows access to the field on the frame sample_frame. HowYou Can Use Bitmap Labels (see page 274) shows how the other two attributesare used.How You Can Use Bitmap LabelsA treeview field has an attribute, ImageList, which is an array of bitmaps. Intree_example_2, the set_up_bitmaps procedure sets up the ImageList. In thiscase, there are three bitmaps: a gray circle, a blue circle, and a red circle.Each of the variables gray, blue, and red contains the index in the ImageListarray of the corresponding bitmap.A tree node has attributes BmpLblIndx and SelBmpLblIndx. You may specifybitmap labels to be displayed with the node by setting BmpLblIndx andSelBmpLblIndx. If BmpLblIndx is a valid index in the array ImageList, thecorresponding bitmap label is displayed when the node is not selected; ifSelBmpLblIndx is a valid index, the corresponding bitmap label is displayedwhen the node is selected.The first treeview example uses no bitmap labels. The second exampleillustrates the use of bitmap labels. When a node is selected, its bitmap label isblue. Initially, the bitmap label is gray when a node is not selected. When youselect a node with a gray bitmap label, the background color of thecorresponding field is changed to red, and BmpLblIndx is changed to red.When you select a node with a red bitmap label, the background color of thecorresponding field is changed back to its original color, and BmpLblIndx is setto gray. The code that changes the bitmap labels is in the event block onsetvalue tvf.How You Can Delete NodesYou can use the DeleteNode method to delete a node from a tree.274 <strong>Programming</strong> <strong>Guide</strong>
Treeview FieldsTreeview Field EventsThe SetValue event occurs when the user clicks the text or the bitmap label ofa node; when this happens, the node's IsSelected attribute is set to TRUE.Two other events that you may find useful are the Expanded and Collapsedevents. These events occur when the user expands or collapses a node byclicking the box that contains a plus sign or a minus sign. The second exampledisplays a message in the frame's status bar when either of these eventsoccurs.Working with List Views and Tree Views 275
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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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ArraysThe inserted row is blank bec
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ArraysThe following code fragment i
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ArraysThese attributes are:AllRowsR
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Page 228 and 229: Table FieldsTable Fields and Associ
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Page 244 and 245: Table Field OperationsThe following
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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
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Page 268 and 269: TreeNode and Tree ClassesMaintenanc
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Page 296 and 297: How You Can Call 3GL ProceduresIn t
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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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