To make this possible, data sources are accessed by drivers. The example below shows how the characters 0 and . Values for the Array fields can be stored like this: Accessing values in an array works like this: And example containing all steps that show real array usage: A variable in LibreOffice Basic has a limited life span and a limited scope from which it can be read and used in other program fragments. This based on the com.sun.star.sdb.DatabaseContext service and is the root object for all database operations. In addition to the FillTransparence property, the com.sun.star.drawing.FillProperties service also provides the FillTransparenceGradient property. You must not declare, in any module of your library, a Public variable or a Public constant, or a Sub, or a Function, named PrintDoc. The following rules apply to numerical characters in LibreOffice Basic: The simplest method is to work with whole numbers. There is no direct counterpart in LibreOffice Basic for the Characters, Sentences and Words lists provided in VBA. The first central line creates the Doc document variable, which references the current spreadsheet document (Doc line = StarDesktop.CurrentComponent). The following example shows how the Dir function can be used to request all files located in one directory. Comparison operators can be applied to all elementary variable types (numbers, date details, strings, and Boolean values). VBA: A ResultSet containing the READ_ONLY and SCROLL_INSENSITIVE properties corresponds to a record set of the Snapshot type in ADO and DAO. To display all information available from an object and link to the corresponding API documentation, use instead the Development Tools built into LibreOffice or MRI extension. It is described in the chapter Apache OpenOffice Basic of the Developer's Guide. They provide the framework for dividing a complex problem into various sub-tasks. The On Error Goto 0 call at the end of the code resets the status information of the error (the error code in the Err system variables) so that an error occurring at a later date can be clearly recognized. The program now checks whether the ResultSet actually exists and traverses the data records using a loop. If this is the case, the Control.Name property then checks whether the name of the control element is MyListBox. The area highlighted by the TextCursor therefore begins after the seventh character in the text and ends after the tenth character. But text documents may also contain other objects. In the preceding example, if we replace the ChangeValue function then the superordinate variable A remains unaffected by this change. VBA: The VBA Click and Doubleclick events are not available in LibreOffice Basic. These are: The following example shows how a query object can be created in a program-controlled manner and can be assigned to a data source. An option button control element provides two properties: You can also use the following properties from the model of the option buttons: To combine several option buttons in a group, you must position them one after another in the activation sequence without any gaps (Model.TabIndex property, described as Order in the dialog editor). The interaction between the AnchorType (from the TextContent Service) and VertOrient (from the BaseFrameProperties Service) properties should be noted here. This detail may be of interest in particular to Java- or C++ programmers, since in these languages, the interface is needed to request a method. The following return values are available in this instance: In the previous example, checking the return values could be as follows: In addition to the information text and the parameter for arranging the information box, MsgBox also permits a third parameter, which defines the text for the box title: If no box title is specified, the default is soffice. Here are a few example calls for the named functions: LibreOffice Basic provides the InStr function for searching for a partial string within another string: The StringToFind parameter specifies the string to be searched for within MyString. One of these is used to query the value of the property and the other is issued to set it (get and set methods). The Filtername property defines whether LibreOffice uses a LibreOffice Calc text filter to open files. The Chart object provides the following properties for administrating these elements: Both services com.sun.star.chart.ChartTitle and com.sun.star.chart.ChartLegend do support the service com.sun.star.drawing.Shape. To ensure that the footer line is visible, the FooterIsOn property is set to True. Several common examples to tell users how to write macros in different applications. Note: This example inserts a cells range that is two rows by two columns in size into the second column and row (each bear the number 1) of the first sheet (number 0) in the spreadsheet. The easiest way is to assign the format properties directly to the text sequence. Instead of producing an error message, the interpreter initializes the typing error as a new variable with a value of 0. If you want to find other matches for the string, the function also provides the opportunity to specify an optional start position from which LibreOffice Basic begins the search. The FileProperties array has two elements, one for each option used. You can define hundreds of dimensions in LibreOffice Basic Arrays; however, the amount of available memory limits the number of dimensions you can have. In this case, the syntax of the function is: In the previous examples, InStr ignores uppercase and lowercase characters. In the following example, the loop is terminated during the fifth pass: The For EachNext loop variation in VBA is supported in LibreOffice Basic. Whereas the position of hard line breaks in the source code of Java, C++, or Delphi programs is irrelevant, each line in a Basic program forms a self-contained unit. This book introduces Base, the database component of LibreOffice. You can write it more easily, this way: Notice that the With construct must be entirely outside of the Select construct. LibreOffice Basic recognizes the following mouse events: Note: Thus, it provides a consistent interface for users who navigate by mouse or by keyboard. VBA: Unlike in VBA, the first column has the index 0 and not the index 1. RectangleShape.CharFontName = "Arial". Character objects in UNO, for example, provide the getPosition and setPosition methods through which the associated key point can be called up and changed. The following call also specifies the True parameter for the document object when requesting the Save method. Internally, LibreOffice Basic saves the associated Unicode value for every character. A data field contains several variables, which are addressed through an index. The Diagram object provides the following properties to access the axes title: and for the secondary axes (available since OpenOffice.org 3.0): The objects for formatting the axes title are based on the com.sun.star.chart.ChartTitle service, which is also used for chart titles. LibreOffice Basic provides the MsgBox and InputBox functions for basic user communication. The LibreOffice Developer's Guide describes the LibreOffice API in more detail than this guide, but is primarily intended for Java and C++ programmers. If UserInput does not contain a valid number, ValidInput is assigned the value 0 and an error message is returned. The formatting properties can be found in each object (Paragraph, TextCursor, and so on) and can be applied directly. To open a file so that it can be written as a text file, the Open call is: Filename is a string containing the name of the file. In other words, formatting using templates is assigned a lower priority than direct formatting in a text. Annotation fields (com.sun.star.text.textfield.Annotation) can be seen by means of a small yellow symbol in the text. To prevent errors caused by an implicit declaration of variables, LibreOffice Basic provides a switch called: This must be listed in the first program line of each module and ensures that an error message is issued if one of the variables used is not declared. The options for defining color gradients and hatches let you create other colors into play. In very rare cases, before calling up some property, use the IsEmpty function to check whether it is actually available. If another error occurs, the system outputs a warning. Here is an list of the most important properties of the table object: A table consists of a list containing rows. Working with LibreOffice Basic The control elements of a form can be linked with an external database table. The symbol bars provided by LibreOffice show the common text properties such as font type, weight and size. You can also define arrays in which the dimension of the data fields dynamically changes. Regardless of this, in some instances you will have to directly access the file system, search through directories or edit text files. This defines what LibreOffice searches for in a document. All drawing objects that can have a border line support the com.sun.star.drawing.LineStyle service. Drawing objects include shapes (rectangles, circles, and so on), lines, and text objects. The preceding call returns a page object that supports the com.sun.star.drawing.DrawPage service. The parameter provides the option of adding additional buttons, defining the pre-assigned button, and adding an information symbol. The ResultSet object provides Update methods for modifying values, which are structured in the same way as the get methods for retrieving values. Whereas in VBA, the methods are applied to the corresponding Range object, in LibreOffice Basic they are applied to the associated Sheet object. The removeByIndex method deletes the sixth column (index 5). In LibreOffice Writer, standard letters can be created with the assistance of SDBC data sources and these can then be printed out. The object variable created must then be initialized so that it can be used. To avoid this problem, the DateSerial function should be used to assign a fixed value to a date variable: The function parameter must be in the sequence: year, month, day. If you are familiar with an interface, then you can transfer your knowledge from one service to another. The code listed in the example is very similar to the code listed in the previous example for determining a control element model. They provide a mechanism through which all subordinate elements of an objects can be passed, step by step, without having to use direct addressing. as is the case in the previous example for paragraphs. 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! The actual object form can be accessed through the Forms list at the drawing level. The type declaration symbol for a currency variable is @. The TimeSerial function formats time details in the same way that the DateSerial function formats dates: Their parameters should be specified in the sequence: hours, minutes, seconds. The formatting options that are available depend on the type of drawing object. The text field is then inserted in the document using the associated text object of the left-hand footer line. The database interface from LibreOffice is available in the LibreOffice Writer and LibreOffice Calc applications, as well as in the database forms. Calculations that use integer variables are very fast and are particularly useful for loop counters. You can also use the following style to declare an integer type variable: The Dim instruction can record several variable declarations: If you want to assign the variables to a permanent type, you must make separate assignments for each variable: If you do not declare the type for a variable, LibreOffice Basic assigns the variable a variant type. Basic provides the FillTransparenceGradient property the control elements of a list containing rows uppercase and lowercase characters preceding,... With a value of 0 data fields dynamically changes and these can then be so... The True parameter for the document using the associated Unicode value for every character parameter for the using! 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