Depending on the variables that are already present, the following example declares up to three new variables: Declaring variables implicitly is not good programming practice because it can result in the inadvertent introduction of a new variable through, for example, a typing error. In this example, variable A is a string, and variable B is an integer. The following properties are provided for 3D charts at the Diagram object: The following example creates a 3D area chart. The entire array can record a total of 6 x 6 = 36 integer values. If you set this value to zero in a dialog, all the control elements are visible regardless of their Step value. The formatting properties can be found in each object (Paragraph, TextCursor, and so on) and can be applied directly. The Object type designation should be used to declare an object variable: The call declares an object variable named Obj. The following example uses a recursive function to calculate the factorial of the numbers 42, -42, and 3.14: The example returns the factorial of the number 42 by recursively calling the CalculateFactorial function until it reaches the base condition of 0! The individual styles can be accessed directly by means of an index: The loop added since the previous example displays the names of all cell styles one after another in a message box. These provide the option of defining a variable search expression with placeholders and special characters rather than a fixed value. A space in a local file name therefore, for example, becomes a %20 in the URL. The FileProperties array has two elements, one for each option used. VBA: The path specifications listed in Dir may use the * and? StarOffice 5: The Range object allows you to address any table area and has been extended in the new API. A is assigned the string 2. Note: The same interface provides the method remove to delete (remove) a page: A copy of a given page is created, not from the DrawPages container, but from the drawing document itself with the method duplicate. As the name suggests, LibreOffice Basic is a programming language from the Basic family. Most charts in LibreOffice can also be displayed with 3D graphics. The objective of developing this interface was to provide access to as many different data sources as possible. The same applies when attempting to assign a string to a Boolean variable: Again, the basic interpreter reports an error. If the activation sequence is interrupted by another control element, then LibreOffice automatically starts with a new control element group that can be activated regardless of the first group of control elements. The CompatibilityMode statement and function provide greater compatibility with VBA, by changing the operation of certain functions. However, unlike a procedure, a function provides a return value. The following example shows a double loop which passes over all paragraphs of a text document and the paragraph portions they contain and applies the replacement processes from the previous example: The example runs through a text document in a double loop. LibreOffice forms may contain text fields, list boxes, radio buttons, and a range of other control elements, which are inserted directly in a text or spreadsheet. If it finds the search term, it takes the part before the expression and writes it to the Result return buffer. With indirect formatting, the user assigns a pre-defined template to the relevant text portion. Base uses the HSQLDB database engine to create database documents. In the present version of LibreOffice, a visible StarDesktop is no longer used. There, an error is triggered and program implementation terminated if a corresponding assignment is executed. For example, the following line declares an array with four integer variables: In the previous examples, the index for the array always begins with the standard start value of zero. The 0 (zero) used as the second parameter in the Dir function ensures that Dir only returns the names of files; directories are ignored. You can navigate through the control elements in any dialog by pressing the Tab key. LibreOffice Basic provides a whole range of methods for reading and writing files. This is a transfer channel which permits direct communication with the database. The method getByName() is mandatory, and should always be available. If you want to apply a predefined color gradient, you can assign the associated name of the FillTransparenceGradientName property. The form can be defined using two properties. Since the points of a polygon are defined as absolute values, you do not need to specify the size or the start position of a polygon. as the decimal point. The following call determines the environment variables of the temporary directory of the operating system: LibreOffice objects and methods, such as paragraphs, spreadsheets, and fonts, are accessible to LibreOffice Basic through the LibreOffice application programming interface, or API. Unlike most other programming languages, Basic performs type conversion automatically. The waiting period is specified in milliseconds. Calculations with long integer variables are very fast and are particularly useful for loop counters. All the named objects return an object that supports the com.sun.star.sheet.HeaderFooterContent service. If comments cover several lines, each line must be identified as a comment: A LibreOffice Basic program can contain dozens, hundreds, or even thousands of markers, which are names for variables, constants, functions, and so on. In #Cells and Ranges, the following example has the qualifiers in the Case statements written out completely, for clarity. Conversely, the CStr methods use the currently selected country-specific settings when formatting numbers, dates and time details. The simpler the better but syntax highlighting is necessary. Note - VBA : Compatibility between OpenOffice.org Basic and VBA relates to the OpenOffice.org Basic language as well as the runtime library. The associated com.sun.star.form.FormButtonType group of constants provides the following values: The OK and Cancel button types provided in dialogs are not supported in forms. The division between visible program elements (View) and the data or documents behind them (Model) occurs at many places in LibreOffice API. No programming knowledge is needed to use the corresponding functions. LibreOffice Basic lets you use whole numbered hexadecimal values, so long as they are preceded by &H. LibreOffice Basic also understands the octal system (base 8 system), which uses the numbers 0 to 7. LibreOffice Basic predefines several constants. The following are some of the important properties of this service: The following example demonstrates use of the named properties. If a document has one page and this is called Slide 1, then the following examples are identical. Programmers who want to work directly with Java or C++ rather than LibreOffice Basic should consult the LibreOffice Developer's Guide instead of this guide. The control elements of dialogs and forms differ in several aspects. Double variables are suitable for precise calculations. LibreOffice Basic provides four functions that return partial strings, plus a length function: Unlike array subscripts, character positions in a string start with 1. In so doing, the name of the proper com.sun.star.text.TextFrame service should be specified. Even the paragraph properties are available in various objects. These include tables, drawings, text fields and directories. LibreOffice automatically creates a new document if the document specified in the URL is a template. You do not need to use another program to create PDFs, unless your printing service requires you to do so. Visit Andrew Pitonyak's web page to get the latest PDF and ODT files of his book The XIndexAccess and XIndexContainer interfaces are used in objects which contain subordinate objects and which can be addressed using an index. With the TypeEnd Type statements, you can define your own (non-UNO) structs: The Type definition is only a pattern or template, not a set of actual variables. The methods for inserting and deleting rows use the Rows object function in the same way as the methods shown for editing columns using the Columns object. The database interface from LibreOffice is available in the LibreOffice Writer and LibreOffice Calc applications, as well as in the database forms. The example code modifies the content in each of these paragraph portions using the String property of the string. It can be very difficult to locate errors of this kind in your code. The LibreOffice API provides you with a whole range of objects with which you can create, open and modify Office documents. An interface combines several methods. Overview. VBA: In LibreOffice Basic, the expression Option Base 1 does not affect the number of elements in an array as it does in VBA. Furthermore, it creates a data field for two PropertyValue entries named PrinterProperties. In its simplest form, the print call is: As in the case of the loadComponentFromURL method, the Dummy parameter is a PropertyValue data field through which LibreOffice can specify several options for printing. The following example traverses the contents of a text document in a loop and uses a message in each instance to inform the user whether the object in question is a paragraph or table. In general, only parts of the interfaces are discussed. A complete list of all text fields is provided in the API reference in the com.sun.star.text.textfield module. LibreOffice Basic provides a range of tools for simplifying error handling. The following example searches through all tables of a text document and applies the right-align format to all cells with numerical values by means of the corresponding paragraph property. VBA: Terminology differs from that used in VBA: In terms of scope of function, the Range object from VBA can be compared with the TextCursor object in LibreOffice and not as the name possibly suggests with the Range object in LibreOffice. The color gradient is depicted using a hundred graduated individual colors (StepCount). For a detailed description please refer to the LibreOffice Basic Guide which is available separately. VBA: In terms of its concept, SDBC is comparable with the ADO and DAO libraries available in VBA. A TextCursor object is created using the createTextCursor call: The Cursor object created in this way supports the com.sun.star.text.TextCursor service, which in turn provides a whole range of methods for navigating within text documents. LibreOffice Basic libraries contain classes, routines and variables, Python modules contain classes, functions and variables. The Diagram object provides the properties Wall and Floor: The specified objects support the com.sun.star.chart.ChartArea service, which provides the usual fill and line properties (com.sun.star.drawing.FillProperties and com.sun.star.drawing.LineProperties services, refer to #Drawings and Presentations). com.sun.star.chart.ChartTitle contains not only the listed formatting properties, but also two other properties: The legend (com.sun.star.chart.ChartLegend) contains the following additional property: The following example creates a chart with a title "Main Title String", a subtitle "Subtitle String" and a legend. Each page in the presentation is a slide. In LibreOffice, the fields are administered using an object-oriented concept. The real API call is: Sheet.getColumns.getByIndex(1). VBA: The ResultSet object from SDBC is comparable with the Recordset object from DAO and ADO, since this also provides iterative access to a database. The following example checks whether the date saved in MyDate is in the year 2003. If there is not enough space, or if this results in long lines, then several lines can be linked together by adding underscores _. The areas can be stacked (com.sun.star.chart.StackableDiagram). To do this, the function expects a Format expression to be specified, which is then used as the template for formatting the numbers. Since replacing parts of character sequences is one of the most frequently used functions, the Mid function in LibreOffice Basic has been extended so that this task is performed automatically. The example Dim MyIntArray(5, 5) As Integer defines an integer array with two dimensions, each with 6 indexes (can be addressed through the indexes 0 to 5). VBA: LibreOffice Basic does not support the VBA Like comparison operator. Note: Charts within spreadsheets can display the data from an assigned cell range within the spreadsheet. VBA: In VBA, the Err.Clear method of the Err object resets the error status after an error occurs. Thanks to these common features, all of these objects in LibreOffice support a common basic service called com.sun.star.text.TextContent. The False value for IsFixed ensures that the date is automatically updated when the document is opened. The execute method of the dialog returns the value 0, which is the same as when you click Cancel. This is an object-oriented programming interface which LibreOffice sub-divides into various objects which for their part ensure program-controlled access to the Office package. If the cursor of LibreOffice is in a cell, then the name of that cell can be seen in the status bar. Since the drivers are based on UNO components, other drivers can be developed and therefore open up new data sources. For example, the TextCursor in the following example. A is therefore assigned the string 11. You can access these elements through the getControl method that returns the control element by name.
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