OpenOffice.org BASIC Guide - OpenOffice.org wiki

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Search and Replace OpenOffice.org Basic provides the InStr function for searching for a partial string within another string: ResultString = InStr (MyString, SearchString) Strings The SearchString parameter specifies the string to be searched for within MyString. The function returns a number that contains the position at which the SearchString first appears within MyString; a return value of zero indicates no match. If you want to find other matches for the string, the function also provides the opportunity to specify an optional start position from which OpenOffice.org Basic begins the search. In this case, the syntax of the function is: ResultString = InStr(StartPosition, MyString, SearchString) In the previous examples, InStr ignores uppercase and lowercase characters. To change the search so that InStr is case sensitive, add the parameter 0, as shown in the following example: ResultString = InStr(MyString, SearchString, 0) Using the previous functions for editing strings, programmers can search for and replace one string in another string: Function Replace(Source As String, Search As String, NewPart As String) Dim Result As String Dim StartPos As Long Dim CurrentPos As Long Result = "" StartPos = 1 CurrentPos = 1 If Search = "" Then Result = Source Else Do While CurrentPos 0 CurrentPos = InStr(StartPos, Source, Search) If CurrentPos 0 Then Result = Result + Mid(Source, StartPos, _ CurrentPos - StartPos) Result = Result + NewPart StartPos = CurrentPos + Len(Search) Else Result = Result + Mid(Source, StartPos, Len(Source)) End If ' Position 0 Loop End If Replace = Result End Function The function searches through the transferred Search string in a loop by means of InStr in the original term Source. If it finds the search term, it takes the part before the expression and writes it to the Result return buffer. It adds the NewPart section at the point of the search term Search. If no more matches are found for the search term, the function establishes the part of the string still remaining and adds this to the return buffer. It returns the string produced in this way as the result of the replacement process. Since replacing parts of character sequences is one of the most frequently used functions, the Mid function in OpenOffice.org Basic has been extended so that this task is performed automatically. The following example replaces three characters with the string is from the sixth position of the MyString string. Dim MyString As String MyString = "This was my text" Mid(MyString, 6, 3, "is") Warning – When it is used with 4 arguments, to replace a sub-string in a string, Mid is an instruction, not a function : it does not return any value ! Chapter 3 · Runtime Library 39
Strings Formatting Strings The Format function formats numbers as a string. To do this, the function expects a Format expression to be specified, which is then used as the template for formatting the numbers. Each place holder within the template ensures that this item is formatted correspondingly in the output value. The five most important place holders within a template are the zero (0), pound sign (#), period (.), comma (,) and dollar sign ($) characters. The 0 character within the template ensures that a number is always placed at the corresponding point. If a number is not provided, 0 is displayed in its place. A . stands for the decimal point symbol defined by the operating system in the country-specific settings. The example below shows how the 0 and . characters can define the digits after the decimal point in an expression: MyFormat = "0.00" MyString = Format(-1579.8, MyFormat) ' Provides "-1579,80" MyString = Format(1579.8, MyFormat) ' Provides "1579,80" MyString = Format(0.4, MyFormat) ' Provides "0,40" MyString = Format(0.434, MyFormat) ' Provides "0,43" In the same way, zeros can be added in front of a number to achieve the desired length: MyFormat = "0000.00" MyString = Format(-1579.8, MyFormat) ' Provides "-1579,80" MyString = Format(1579.8, MyFormat) ' Provides "1579,80" MyString = Format(0.4, MyFormat) ' Provides "0000,40" MyString = Format(0.434, MyFormat) ' Provides "0000,43" A , represents the character that the operating system uses for a thousands separator, and the # stands for a digit or place that is only displayed if it is required by the input string. MyFormat = "#,##0.00" MyString = Format(-1579.8, MyFormat) ' Provides "-1.579,80" MyString = Format(1579.8, MyFormat) ' Provides "1.579,80" MyString = Format(0.4, MyFormat) ' Provides "0,40" MyString = Format(0.434, MyFormat) ' Provides "0,43" In place of the $ place holder, the Format function displays the relevant currency symbol defined by the system (this example assumes a European locale has been defined): MyFormat = "#,##0.00 $" MyString = Format(-1579.8, MyFormat) ' Provides "-1.579,80 €" MyString = Format(1579.8, MyFormat) ' Provides "1.579,80 €" MyString = Format(0.4, MyFormat) ' Provides "0,40 €" MyString = Format(0.434, MyFormat) ' Provides "0,43 €" The format instructions used in VBA for formatting date and time details can also be used: sub main dim myDate as date myDate = "01/06/98" TestStr = Format(myDate, "mm-dd-yyyy") ' 01-06-1998 MsgBox TestStr end sub Date and Time OpenOffice.org Basic provides the Date data type, which saves the date and time details in binary format. Specification of Date and Time Details within the Program Code You can assign a date to a date variable through the assignment of a simple string: Dim MyDate As Date 40 OpenOffice.org 3.2 BASIC Guide · March 2010
Page 1 and 2: OpenOffice.org 3.2 BASIC Guide
Page 3 and 4: 3 1 2 3 4 Contents Copyright.......
Page 5 and 6: Preface This guide provides an intr
Page 7 and 8: About OpenOffice.org Basic and allo
Page 9 and 10: Overview of a Basic Program In addi
Page 11 and 12: Working With Variables example, in
Page 13 and 14: Numbers with long integer variables
Page 15 and 16: Numbers return incorrect values. Th
Page 17 and 18: Arrays Dim MyInteger(3) creates 4 i
Page 19 and 20: Scope and Life Span of Variables Sc
Page 21 and 22: Constants Const A = 10 You can also
Page 23 and 24: Branching B = 0 End If In this exam
Page 25 and 26: Loops use an explicit counter like
Page 27 and 28: Procedures and Functions ' ... here
Page 29 and 30: Procedures and Functions The exampl
Page 31 and 32: Error Handling The following code i
Page 33 and 34: Other Instructions End Sub & "Text:
Page 35 and 36: Conversion Functions calculates the
Page 37: Conversion Functions IsBoolean = Fa
Page 41 and 42: Date and Time The Weekday function
Page 43 and 44: Files and Directories Note - VBA :
Page 45 and 46: Files and Directories The FreeFile
Page 47 and 48: Message and Input Boxes Display of
Page 49 and 50: Other Functions specifies the same
Page 51 and 52: Universal Network Objects (UNO) com
Page 53 and 54: Tools for Working with UNO The foll
Page 55 and 56: Overview of Central Interfaces basi
Page 57 and 58: 5 C H A P T E R 5 5 Working with
Page 59 and 60: XML File Format The StarDesktop Ope
Page 61 and 62: The StarDesktop The FileProperties
Page 63 and 64: The options of the print method The
Page 65 and 66: Doc = ThisComponent StyleFamilies =
Page 67 and 68: 6 C H A P T E R 6 6 Text Documen
Page 69 and 70: described in Search and Replace. Th
Page 71 and 72: Paragraph Properties The Structure
Page 73 and 74: If TextElement.supportsService("com
Page 75 and 76: isEndOfSentence () returns True if
Page 77 and 78: Doc.Text.insertControlCharacter(Cur
Page 79 and 80: Dim Replace As Object Dim BritishWo
Page 81 and 82: More Than Just Text Note - Text tab
Page 83 and 84: Doc.Text.insertTextContent(Cursor,
Page 85 and 86: frame objects are set to the starti
Page 87 and 88: The following example shows how the
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7 C H A P T E R 7 7 Spreadsheet
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The same interface provides methods
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Cell = Sheet.getCellByPosition(0, 0
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StartColumn (long) first column in
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You can apply all of the named prop
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NumberFormatId = NumberFormats.addN
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ShadowFormat (struct) The Structure
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FooterBottomBorderDistance (long) d
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Definition of Elements to be Printe
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VARP variance based on the total po
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8 C H A P T E R 8 8 Drawings and
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Doc = ThisComponent Page = Doc.Draw
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RectangleShape.Position = Point Rec
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The lines are dark gray (Color) and
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service. Dim Doc As Object Dim Page
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An Overview of Various Drawing Obje
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Page.add(LineShape) Polypolygon Sha
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AdjustBlue (Short) blue value as a
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Point.x = 1000 Point.y = 1000 Size.
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Pause (long) the amount of time tha
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Using Charts in Spreadsheets The pr
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The Structure of Charts com.sun.sta
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The Structure of Charts Min (Double
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The Structure of Charts HasZAxisGri
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The Structure of Charts The followi
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10 C H A P T E R 1 0 10 Database
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User (String) user name Password (S
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Dim Statement As Object Dim ResultS
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FORWARD_ONLY ResultSet only permits
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11 C H A P T E R 1 1 11 Dialogs
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Closing With the Close Button in th
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Multi-Page Dialogs Properties A dia
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Control element-specific events: Ev
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Buttons (short) X (long) Y (long) b
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Temporary (Boolean) the focus is te
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Model.Label (String) label that is
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Model.HScroll (Boolean) the text ha
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12 C H A P T E R 1 2 12 Forms In
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Accessing the View of Control Eleme
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Tag (String) Control Element Forms
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Enabled (Boolean) the control eleme
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LineCount (Short) number of lines o
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