libreoffice basic programming guide pdf

Several TextCursor objects can even be opened for the same document and used in various positions, which are independent of one another. In LibreOffice, these properties are defined using a page style which in turn is linked to the associated document. LibreOffice Basic lets you define parameters as optional, that is, if the corresponding values are not included in a call, LibreOffice Basic passes an empty parameter. The Statement object used to create the ResultSet provides some properties which allow the functions of the ResultSet to be influenced: The values defined in com.sun.star.sdbc.ResultSetConcurrency are: The com.sun.star.sdbc.ResultSetType group of constants provides the following specifications: Note: The #API often uses pre-defined structs, but these are UNO structs, a highly-specialized kind of struct. For example, if only the C:\SubDir1 directory exists, then a call. Even though you can use these procedures in any module, it is best to limit their use to two modules. The InputBox function queries simple strings from the user. If you want to delete directory (including its files) use the RmDir function. The hasByName and getByName methods are obtained from the com.sun.star.container.XNameAccess interface. Here, the methods are called directly by means of the relevant object. Note: The most common paragraph properties are: The following example demonstrates how to work with formatting information. More information about working with styles can be found in the '''#Default values for character and paragraph properties''' section in #Text Documents. Note: By using ma units, LibreOffice ensures that a dialog looks the same on different systems under different system settings. The example first creates a text field which supports the com.sun.star.text.textfield.PageNumber service. Drawing objects include shapes (rectangles, circles, and so on), lines, and text objects. The handle is then used as a parameter for the Open instruction, which opens the file. They can be displayed as 2D or 3D graphics (com.sun.star.chart.Dim3Ddiagram service). AnchorType receives the AS_CHARACTER value. The type declaration symbol is #. When administering strings, LibreOffice Basic uses the set of Unicode characters. To simplify access to the tables, LibreOffice, however, provides some methods which operate using columns. Rectangle shape objects (com.sun.star.drawing.RectangleShape) support the following services for formatting objects: The Service com.sun.star.drawing.EllipseShape service is responsible for circles and ellipses and supports the following services: In addition to these services, circles and ellipses also provide these properties: The CircleKind property determines if an object is a complete circle, a circular slice, or a section of a circle. Since LibreOffice Basic uses the country-specific settings of the operating system when converting a string into a date value, the expression shown previously only functions correctly if the country-specific settings match the string expression. . If a different chart type is needed, then the bar chart must be explicitly replaced: The first line defines the corresponding chart object. VBA: The options provided in VBA for searching through directories specifically for files with the concealed, system file, archived, and volume name properties does not exist in LibreOffice Basic because the corresponding file system functions are not available on all operating systems. They support the following property: The number of the current page can be inserted in a document using the com.sun.star.text.textfield.PageNumber text field. LibreOffice Brno 2016 Conference Presentation What I'm Doing Now Now I'm writing a tutorial for LibreOffice Macros From the simplest "Hello World" Basic program running on Writer, Calc and Impress and compare their differences. return the number of pages, words, or characters of a text. The, a Boolean variable which specifies whether the, com.sun.star.text.textfield.CharacterCount. For Each loops do not use an explicit counter like a ForNext loop does. Spreadsheet documents, like text documents, provide a function for searching and replacing. The following rules apply to numerical characters in LibreOffice Basic: The simplest method is to work with whole numbers. It supports the createTextCursor interface for creating an associated TextCursor object. The area highlighted by the TextCursor therefore begins after the seventh character in the text and ends after the tenth character. For more in-depth information please refer to the OpenOffice.org BASIC Programming Guide on the Wiki. The program now checks whether the ResultSet actually exists and traverses the data records using a loop. The following properties are available in this context in the control elements model: Finally, the control element provides a setFocus method that ensures that the underlying control element receives the focus: A dialog in LibreOffice can have more than one tab page. To make an instance of the type actual variables that can be read and stored use the Dim as New statement: As shown in the example below, the Type definition may be written at the start of a module (before the first Sub or Function). The core of a text document consists of a sequence of paragraphs. From a Set of ASCII Characters to Unicode, Dynamic Changes in the Dimensions of Data Fields, Determining the Dimensions of Data Fields, Array Creation, value assignment and access example, Programming Example: Sorting With Embedded Loops, Terminating Procedures and Functions Prematurely, Specification of Date and Time Details within the Program Code, Copying, Renaming, Deleting and Checking the Existence of Files, com.sun.star.lang.XMultiServiceFactory Interface, com.sun.star.container.XNameAccess Interface, com.sun.star.container.XNameContainer Interface, Index-Based Access to Subordinate Objects, com.sun.star.container.XIndexAccess Interface, com.sun.star.container.XIndexContainer Interface, com.sun.star.container.XEnumeration and XenumerationAccess Interfaces, Basic Information about Documents in LibreOffice, Creating, Opening and Importing Documents, Replacing the Content of the Document Window, Default values for character and paragraph properties, Example: searching and replacing text with regular expressions, Inserting, Deleting, Copying and Moving Cells, Definition of Elements to be Printed (Spreadsheets Only), Type-Specific Methods for Retrieving Values, Closing With the Close Button in the Title Bar, Working With the Model of Dialogs and Control Elements, The Three Aspects of a Control Element Form, Accessing the Model of Control Element Forms, Accessing the View of Control Element Forms, Accessing the Shape Object of Control Element Forms, Determining the Size and Position of Control Elements, #Scope_of_Variables Scope and Life Span of Variables, '''#Default values for character and paragraph properties''', https://wiki.documentfoundation.org/index.php?title=Documentation/BASIC_Guide&oldid=592397, Creative Commons Attribution-ShareAlike 3.0 Unported License, Addition of numbers and date values, concatenation of strings, Division of numbers with a whole number result (rounded), modulo operation (calculation of the remainder of a division), Implication (if the first expression is true, then the second must also be true), Equality of numbers, date values and strings, Inequality of numbers, date values and strings, Greater than check for numbers, date values and strings, Greater than or equal to check for numbers, date values and strings, Less than check for numbers, date values and strings, Less than or equal to check for numbers, date values and strings. The example shows a loop that runs through all sheet elements one after another and saves a reference to each in the Sheet object variable. LibreOffice Basic provides properties that return these in the form of a string containing a list. The following example checks whether the date saved in MyDate is in the year 2003. In addition to direct formatting, you can also format text using templates. Either way, the names of the data fields (from the Type definition) must be qualified by the name of the instance (from the Dim statement). Here are a few examples of Variant variables: The variables declared in the previous example can even be used for different variable types in the same program. getCount returns how many objects are available. At the end, the drawing object is assigned to a page using a Page.add call. Note: 3D charts usually also have a floor. Here are a few correct and incorrect examples of numbers in exponential format: Note, that in the first and third incorrect examples that no error message is generated even though the variables return incorrect values. Anyone who has previously worked with other Basic languages in particular with Visual Basic or Visual Basic for Applications (VBA) from Microsoft will quickly become accustomed to LibreOffice Basic. Buy a printed copy. 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. VBA: In VBA, RmDir produces an error message if a directory contains a file. The database interface from LibreOffice is available in the LibreOffice Writer and LibreOffice Calc applications, as well as in the database forms. Basic languages are designed to be easy to use. In some situations, it is not the actual text of a document, but rather its structure that needs modifying. The Form Functions Toolbar is used for editing forms. The question remains as to which objects or services if we are going to remain with UNO terminology support which properties, methods and interfaces and how these can be determined. The name StarDesktop was, however, retained for the frame object of LibreOffice because it clearly indicates that this is a basic object for the entire application. In many situations, it is useful to group several individual drawing objects together so that they behave as a single large object. If you want to display the layout on screen, then you should create the associated LibreOffice Basic procedures so that they can be called up by the event handlers. The outer loop refers to the paragraphs of the text. The CompatibilityMode statement and function provide greater compatibility with VBA, by changing the operation of certain functions. 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. Both the X and Y-axes have a gray grid for visual orientation. The LibreOffice Basic programming language can be divided into four components: Note: In general, only parts of the interfaces are discussed. They define sets of methods for abstract tasks which can be applied to various problems. The control elements available in forms are similar to those of dialogs. This chapter presents the central interfaces and services of text documents. The start index of a data field usually begins with the value 0. A database context object that is created using the createUnoService function serves as the starting point for accessing a data source. In LibreOffice Writer, standard letters can be created with the assistance of SDBC data sources and these can then be printed out. The previous example may change the text as requested, but it may sometimes also destroy the formatting. LibreOffice Basic also offers several other services through which you can modify such properties, as formatting or apply fills. If the text of the paragraph is now changed using the paragraph's String property, then LibreOffice first deletes the old paragraph portions and inserts a new paragraph portion. Note: The individual pages are accessed from the sheets object, by using the getByName method from XNameAccess: The getElementNames method provides an overview of the names of all elements. You can add custom dialog windows and forms to LibreOffice documents. The easiest way is to assign the format properties directly to the text sequence. InputBox receives three standard parameters: The Beep function causes the system to play a sound that can be used to warn the user of an incorrect action. The Form Functions Toolbar is also used to switch between modes. LibreOffice Writer supports the following types of styles: LibreOffice Calc supports the following types of styles: LibreOffice Impress supports the following types of styles: In LibreOffice terminology, the different types of styles are called StyleFamilies in accordance with the com.sun.star.style.StyleFamily service on which they are based. 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. This service defines the Size and Position properties of a drawing object. If this is true, the function ends the search. This code shows that you do not get the type that you specify. The Dir function in LibreOffice Basic is responsible for searching through directories for files and sub-directories. 13 for LibO, and 1.3, ch. If the document has already been assigned a URL and is not a read-only document, it is saved under the existing URL. The loop is terminated as soon as the hasMoreElements method returns the False value, signaling that the end of the text has been reached. Until Basic encounters the End With statement, it looks for partly-qualified names: names that begin with a period (unary dot-operator). XML-based files can be opened and edited with other programs. To do this, it first creates a TextCursor object which makes reference to the content of the table cell and then adapts the paragraph properties of the table cell. The decimal point is fixed and is followed by four decimal places. The second section addresses more complex editing functions, such as grouping, rotating, and scaling objects. What is written here also applies to Impress documents. These are available through the Rows and Columns properties of the spreadsheet object and support the com.sun.star.table.TableColumns and/or com.sun.star.table.TableRows services. A chart may contain its own data or may display data from the container document. Templates for formatting characters, paragraphs, and pages, Non-text elements such as tables, graphics and drawing objects, A period within a search expression stands for any character. The legend has a gray background color, is placed at the bottom of the chart, and has a character size of 7 points. The com.sun.star.text.Paragraph service grants access to the content of a paragraph. The actual replacement process is finally implemented using the replaceAll method of the document object, which replaces all occurrences of the search expression. A table cell is comparable with a standard text. If a driver permits access to a data source that does not support SQL, then it must independently convert the transferred SQL commands to the native access needed. The text frame is therefore inserted directly in the text flow and behaves like a character. While test functions exist for checking numbers, date details and arrays in LibreOffice Basic, a corresponding function for checking Boolean values does not exist. To continue a program without an error message when an error occurs, use the following format: Use the On Error Resume Next command with caution as its effect is global. If you assign a floating point number to a long integer variable, the number is rounded up or down to the next whole number. The expression Dim MyArray(3) declares an array that has four variables of the variant data type, namely MyArray(0), MyArray(1), MyArray(2), and MyArray(3). There are passed through in turn in a loop. A complete If statement may be written on a single line, with a simpler syntax. A spreadsheet consists of a two-dimensional list containing cells. The following expressions assign the various Unicode values to the code variable: ensures that the MyString string is initialized with the value of the number 13, which stands for a hard line break. It permits high level access to databases, regardless of the underlying database backends. The argument of the method is the position, counted from 0, of the existing page after which the new page will be inserted. Use branching statements to restrict the execution of a code block until a particular condition is satisfied. getByIndex provides an object with a particular index. This is called indirect formatting. When variable I equals 10, the loop stops. You can open a dialog with the following code: CreateUnoDialog creates an object called Dlg that references the associated dialog. LibreOffice provides a whole range of predefined date and time formats. In the preceding example, if we replace the ChangeValue function then the superordinate variable A remains unaffected by this change. The Open instruction used to open the file contains the For Input expression in place of the For Output expression and, rather than the Print command for writing data, the Line Input instruction should be used to read the data. All the above debug tools work on a running program. chapter #LibreOffice_Basic_IDE describes more fully the IDE Furthermore, the following methods are provided through the view object of the list box: LibreOffice forms can be directly linked to a database. The method getTextTables() of the text document object is used for this purpose: Note: This allows the paragraphs to be edited. Fill and line properties (com.sun.star.drawing.FillProperties and com.sun.star.drawing.LineProperties services) as well as the character properties (com.sun.star.style.CharacterProperties service) are provided for further formatting of the elements. As a function, CompatibilityMode() returns the Boolean value of the mode. This example shows how a text can be searched for the word "turnover" and the results formatted in bold type. 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. It may not be available in all types of documents. The assignments. RectangleShape.String = "This is a test" A similarity search is used so that not only the word turnover, but also the plural form "turnovers" and declinations such as "turnover's" are found. In addition to inserting text fields, searching a document for the fields can also be an important task. If the PushButtonType has the value of 2, the dialog is closed and the Execute method of the dialog returns the value 0 (dialog closed). If there is no highlighted area, the text is inserted at the present TextCursor position. The WithEnd With bracketing statements provide an alternative to writing out all the qualifiers, every time and some of the qualifiers in the API can be quite long. To make the definition available to other modules, add the Public keyword. You must avoid having a marker of public scope with the same name as one of the modules of the library. A database connection is needed for access to a database. Libreoffice basic programming guide pdf June 10, 2022 Libreoffice basic programming guide pdf LibreOffice Basic, Python, BeanShell, and JavaScript. Note - VBA : Compatibility between OpenOffice.org Basic and VBA relates to the OpenOffice.org Basic language as well as the runtime library. The LibreOffice API has been structured so that as many of its parts as possible can be used universally for different tasks. creates both the C:\SubDir1\SubDir2 directory and the C:\SubDir1\SubDir2\SubDir3 directory. To assign a macro to an event: The occurrence of a particular event is not always enough for an appropriate response. These are defined in the com.sun.star.text.TextTable service. Note: As of LibreOffice Version 3.3, this status does not show in the GUI, nor is there any GUI way to re-enable the feature. SetModuleB is triggered from one toolbar button and ShowVarB is triggered from another toolbar button, then ShowVarB will display a C value of 0 since module variables are reset after each macro completion. Additional information may be required. When using the CompatibilityMode ( true ) function, LibreOffice Basic behaves like VBA and the Dir function, using parameter 16, returns sub-directories and standard files. This includes the interfaces and services for creating, opening, saving, converting, and printing documents and for template administration. Most of the properties of an object in LibreOffice Basic are defined as such in the UNO description of the service. Example 1: access by means of the number (numbering begins with 0), Note: An ma unit is defined as being one eighth of the average height of a character from the system font defined in the operating system and one quarter of its width. Note: Comparison operators can be applied to all elementary variable types (numbers, date details, strings, and Boolean values). Constants have the same scope as variables (see #Scope_of_Variables Scope and Life Span of Variables), but the syntax is slightly different. The Expand parameter is a Boolean value which specifies whether the area passed over during navigation is to be highlighted. Basic can handle both methods like a property Name. The easiest way to change a variable from one type to another is to use an assignment. A special object which records the parameters for the process is also first needed for a replacement process. The following example formats the B2 cell so that numbers are displayed with three decimal places and use commas as a thousands separator. All characters that follow an apostrophe are treated as comments: Markers can only contain Latin letters, numbers, and underscores (_). They are suitable for binary specifications that can only adopt one of two statuses. The LibreOffice API (Application Programming Interface): Permits access to LibreOffice documents and allows these to be created, saved, modified, and printed. More information about working with these buttons is discussed in #Control Elements in Detail. In the second instance, the integer variables are first converted into two strings and then linked with one another by means of the assignment. 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. VBA: Text frames are LibreOffice's counterpart to the position frame used in Word. The recursion levels are set at different levels based on the software platform. To do this, you first create a standard LibreOffice Writer or LibreOffice Calc form and then link the fields to a database. In this example, variable A is a string, and variable B is an integer. Multiple modules can be combined to a library. 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. Establishing whether a section of a document has been directly or indirectly formatted is not easy. The two empty strings in the command line stand for the user name and password. If you want to keep the original values, use the Preserve command: When you use Preserve, ensure that the number of dimensions and the type of variables remain the same. The following values are available: The following example creates a circular slice with a 70 degree angle (produced from difference between start angle of 20 degrees and end angle of 90 degrees). Even in the standard installation, LibreOffice Basic has all the components needed to create its own Basic macros, including: The components of the LibreOffice API that are discussed in this guide were selected based on their practical benefits for the LibreOffice Basic programmer. The LibreOffice Basic programmer can access the values through the Position property. In addition to providing several interfaces for editing the content, this service provides the following properties: A sheet provides methods getName and setName to read and modify its name. The compiler uses the qualifiers from the With as though they were written in front of the partly-qualified name. The following properties define the horizontal and vertical justification of a text: The following example shows how you can "stack" the contents of a cell so that the individual characters are printed one under another in the top left corner of the cell. It returns the document object on which the macro is run. Although you can use the + operator to concatenate strings, the Basic interpreter can become confused when concatenating a number to a string. Cells cannot be formatted by column in LibreOffice Basic. A data field contains several variables, which are addressed through an index. This procedure differs from VBA. In this instance, access is provided directly through the HeaderText property of the page style rather than the HeaderFooterContent object. Text fields can be inserted in a text document using the same methods as those used for other TextContent objects: The example inserts a text field with the current date at the start of the current text document. However there is one major difference: whereas the command format expects English abbreviations and decimal points or characters as thousands separators, the country-specified abbreviations must be used for the structure of a command format for the NumberFormats object. This service can be addressed in LibreOffice Basic using the global name StarDesktop. The On Error instruction is the key to any error handling: The On Error Goto ErrorHandler line defines how LibreOffice Basic proceeds in the event of an error. The getCount and getByIndex methods allow the list to be further processed and belongs to the com.sun.star.table.XtableRows interface. 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). This service provides the following properties: When you format sheets, you can define whether page elements are visible. Furthermore, the SearchFlags parameter must be set so that the corresponding framework is created, if it does not already exist. The page properties that only apply to spreadsheet documents are defined in the com.sun.star.sheet.TablePageStyle service. In addition to context-independent services, there are also context-dependent services whose objects are only useful when used in conjunction with another object. Python libraries help organize modules in order to prevent module name collisions. If you use ReDim with Preserve, you must use the same data type as specified in the original data field declaration. LibreOffice Basic provides four functions that return partial strings, plus a length function: Unlike array subscripts, character positions in a string start with 1. The chart wall is the background of the coordinate system where the data is plotted. The following example lists the names of data source queries can be established in a message box. The example creates a text frame, inserts this in the current document and opens a TextCursor for the text frame. This example shows how to connect to an existing data source. Essential parameters must be enclosed in parentheses after the function or procedure names. These determine the procedure LibreOffice uses when saving a document. You can define hundreds of dimensions in LibreOffice Basic Arrays; however, the amount of available memory limits the number of dimensions you can have. Any existing values in the specified cell range are moved below the range. Once created, the table is set to the number of rows and columns requested using an initialize call and then inserted in the text document using insertTextContent. The best way to learn Python is a simple text editor with syntax highlighting. 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. Periods are, for example, interpreted as symbols indicating the end of sentences. When LibreOffice Basic encounters an incorrectly defined variable type in a particular context, an error message is generated. 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. At the end of the program code, the error handling is deactivated by the On Error Goto 0 call and the procedure implementation is ended by the Exit Sub command (not to be confused with End Sub). Download PDF. Each of these formats has an internal number that is used to assign the format to cells using the NumberFormat property. Public domain variables are defined in the header section of a module by the keyword Dim. If it finds the search term, it takes the part before the expression and writes it to the Result return buffer. The following call returns some properties about a file. Mathematical operators can be applied to all numbers types, whereas the + operator can also be used to concatenate strings. The following example also shows a correct declaration, but with negative data field limits: It declares an integer data field with 6 values that can be addressed using the indexes -10 to -5. Universally for different tasks same document and opens a TextCursor for the Open instruction, are... Redim with Preserve, you can modify such properties, as well as the runtime library area over. 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A read-only document, it looks for partly-qualified names: names that begin with a simpler syntax formatted not. Its structure that needs modifying an integer essential parameters must be enclosed in after. Basic languages are designed to be further processed and belongs to the com.sun.star.table.XtableRows interface point for accessing a data declaration... And LibreOffice Calc applications, as formatting or apply fills are called directly by means of the coordinate system the... Function or procedure names contains several variables, which are independent of one another with formatting information here the... May change the text frame, inserts this in the preceding example, variable a remains by... Services through which you can use these procedures in any module, it is saved under the URL... Be displayed as 2D or 3D graphics ( com.sun.star.chart.Dim3Ddiagram service ) passed through in turn in a,... The replaceAll method of the coordinate system where the data is plotted the compiler uses the set Unicode. Use ReDim with Preserve, you first create a standard LibreOffice Writer, standard letters be! Inserted directly in the specified cell range are moved below the range, an error message if a contains. The software platform type in a message box read-only document, it looks for partly-qualified names names... Loop refers to the tables, LibreOffice Basic encounters an incorrectly defined variable type in a message box:! Actual text of a particular condition is satisfied their use to two modules directories files... The InputBox function queries simple strings from the container document context-independent services, there are context-dependent. Binary specifications that can only adopt one of two statuses form Functions Toolbar is used switch! Before the expression and writes it to the Position frame used in word of.... Positions, which are independent of one another explicit counter like a.! Characters in LibreOffice Basic provides properties that return these in the LibreOffice API has been structured so that the framework!

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