For a detailed description please refer to the LibreOffice Basic Guide which is available separately. The applications are: Writer (a word processor), Draw (vector graphics drawing), Impress (for slide presentations), Calc (spreadsheets), Base (a database front- end), and Math (for writing formulae). Note: If you want to change the size or position of control elements for runtime, determine the total size of the dialog and adjust the values for the control elements to the corresponding part ratios. Information about creating, opening, and saving drawings can be found in #Working With Documents. To assign a macro to an event: The occurrence of a particular event is not always enough for an appropriate response. Objects that allow character properties to be set have to support the com.sun.star.style.CharacterProperties service. In error handling, it is useful to have a description of the error and to know where and why the error occurred: shows how the error information can be displayed in a message window. The most important field types and their properties are described in the following sections. Here we rename the first page of the drawing document. These include not only single-dimensional strings, but also two-dimensional fields. If this is not the case, it must be determined using the preceding code. The two functions are handled identically. These objects cover not only the options, but also the current search text and, if necessary, the associated text replacement. The waiting period is specified in milliseconds. To make your code easier to read, you should assign meaningful names to these procedures. Double variables are suitable for precise calculations. The expression MB_YESNOCANCEL + MB_DEFBUTTON3 is harder to write, but easier to understand. All navigation methods furthermore return a Boolean parameter which specifies whether the navigation was successful or whether the action was terminated for lack of text. 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. The following call can therefore be used to provide a file with read-only status: The date and time of the last amendment to a file are provided by the FileDateTime function. Each major type of LibreOffice document has its own associated template type. Note: This chapter provides an overview of the key elements and constructs of the LibreOffice Basic language, as well as the framework in which applications and libraries are oriented to LibreOffice Basic. When working with LibreOffice documents, it is useful to deal with some of the basic issues of document administration in LibreOffice. The start() method of the object is used to start the example and run the screen presentation. Note: The bars can be stacked (com.sun.star.chart.StackableDiagram). Even the search properties and methods available differ. The following example shows how all text fields of a text document can be traversed in a loop and checked for their relevant type. The Format function formats numbers as a string. This is not, for example, possible with complex SQL commands with linked columns or accumulated values. You will find an overview of the character and paragraph properties available in LibreOffice in the following two sections. You must use whole numbers that are preceded by &O. Boolean variables can only contain one of two values: True or False. The following example lists the names of data source queries can be established in a message box. To use a Universal Network Object in LibreOffice Basic, you will need a variable declaration for the associated object. The LibreOffice API and the Dialog Editor are not compatible with VBA (standardizing these interfaces would have made many of the concepts provided in LibreOffice impossible). Note: The majority of these properties are defined in the com.sun.star.text.BaseFrameProperties service, which is also supported by each TextFrame service. The function ensures that the variable is actually assigned the correct value regardless of the country-specific settings. Visit Andrew Pitonyak's web page to get the latest PDF and ODT files of his book A database is incorporated into LibreOffice by creating what is commonly referred to as a data source. Finally, when calling up a text file, the eof instruction is used to check whether the end of the file has been reached: The following example shows how a text file can be read: The individual lines are retrieved in a Do While loop, saved in the Msg variable, and displayed at the end in a message box. LibreOffice provides a whole range of predefined date and time formats. The found expressions differ by up to two letters from the search expression: Note: The code used in the example first checks whether the database is password protected. This based on the com.sun.star.sdb.DatabaseContext service and is the root object for all database operations. VBA: Through their ValueItemList property, list box forms provide a counterpart to the VBA property, ItemData, through which you can administer additional information for individual list entries. Or this much simpler function can be used. Drawing objects include shapes (rectangles, circles, and so on), lines, and text objects. The fill mode of a drawing object is defined using the FillStyle property. The Select Case statement evaluates the expression, which is TRUE or FALSE, and then compares that value to Var. Like bubbles, the variables gradually migrate to the right position. The Step property of a dialog defines the current tab page of the dialog whereas the Step property for a control element specifies the tab page where the control element is to be displayed. Building on this background, the following chapters will show how the API can be used to make LibreOffice do what you want it to do. The previous example may change the text as requested, but it may sometimes also destroy the formatting. To prevent this effect, the user can access the associated paragraph portions rather than the entire paragraph. LibreOffice Basic Programming -- Resources for Learning English common, writer, calc, base, macro EssayFebruary 25, 2022, 3:17pm #1 H Everyone, Does anyone know of any books, pdf files, or courses where one can learn LibreOffice Basic and the ins and outs of macros in LibreOffice? The text frame is therefore inserted directly in the text flow and behaves like a character. All LibreOffice documents provide a special interface for this purpose, and this interface always functions in accordance with the same principle: Before a search process, what is commonly referred to as a SearchDescriptor must first be created. The number of additional, deleted and modified characters for these expressions can be defined individually. LibreOffice programming with Java or C++ is a considerably more complex process than programming with LibreOffice Basic. You can access individual pages either through their number or their name. The following example shows how a text file is opened, written, and closed: Text files are read in the same way that they are written. In some instances, the date cannot be converted: In the example shown, the assignment of the test string to a date variable makes no sense, so the Basic interpreter reports an error. Instead of producing an error message, the interpreter initializes the typing error as a new variable with a value of 0. The ResultSet object provides Update methods for modifying values, which are structured in the same way as the get methods for retrieving values. The following example uses the hasByName method to check if a sheet called MySheet exists. All objects that support the com.sun.star.text.Paragraph service also provide support for the paragraph properties in com.sun.star.style.ParagraphProperties. In addition to the listed properties, the com.sun.star.drawing.LineStyle service provides options for drawing dotted and dashed lines. However, unlike the variable declaration, the array name is followed by parentheses which contain the specifications for the number of elements. Below, you will find a list of the most important text fields and their associated properties. In its simplest form, the command for an explicit declaration of a variable is as follows: This example declares a variable with the name MyVar and the type variant. More information about working with these buttons is discussed in #Control Elements in Detail. The print method expects a PropertyValue data field as a parameter, which reflects the settings of the print dialog of LibreOffice: The following example shows how several pages of a document can be printed out using the Pages option: The com.sun.star.view.XPrintable interface provides the Printer property, which selects the printer. In the preceding example, you can also assign the Step value of 0 to the dividing line as well as the Cancel, Prev, Next, and Done buttons to display these elements on all pages. Some interfaces of LibreOffice can be found in many parts of the LibreOffice API. LibreOffice Basic allows numbers to be specified in the exponential writing style, for example, you can write 1.5e-10 for the number 1.5 x 10-10 (0.00000000015). The symbol defined in the corresponding country-specific settings must be used as the decimal point symbol. You can create and structure dialogs using the LibreOffice dialog editor: You can drag the control elements from the design pallet (right) into the dialog area, and define their position and size. The example shows a dialog that contains a label and a list box. To keep the previous values, you must define the variable as Static: Note: The Goto ErrorHandler ensures that LibreOffice Basic exits the current program line and then executes the ErrorHandler: code. If you set this value to zero in a dialog, all the control elements are visible regardless of their Step value. They are suitable for binary specifications that can only adopt one of two statuses. The expressions for searching and replacing are set using the SearchString and ReplaceString properties of the ReplaceDescriptors. The following call deletes the Filename file. Fill properties are combined in the com.sun.star.drawing.FillProperties service. Whereas in VBA, the methods are applied to the corresponding Range object, in LibreOffice Basic they are applied to the associated Sheet object. Note: Anyone who is already familiar with LibreOffice Basic programming can find additional information in the Developer's Guide on LibreOffice Basic and LibreOffice programming. The page properties that only apply to spreadsheet documents are defined in the com.sun.star.sheet.TablePageStyle service. 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