The steep learning curve is not imposed by your chosen language. Most template types Draw templates are the exception have an automatic-update feature. All occurrences of the name, The character $ marks a paragraph end. As an alternative, a validity range with start and end values can be specified for the data field declaration. The simplest variant is a single-color fill. The getByIndex method returns a row object, which supports the com.sun.star.text.TextTableRow service. In LibreOffice Basic, the * placeholder may however only be the last character of a file name and/or file extension, which is not the case in VBA. The basic structure of the example is oriented towards the examples for running though the paragraph portions of a text already discussed previously. Some central interfaces are used so frequently, triggered by different services, that they are shown again at the end of this chapter. For a detailed description please refer to the LibreOffice Basic Guide which is available separately. The XIndexContainer interface provides the insertByIndex and removeByIndex functions. A table cell is comparable with a standard text. Instead, to simplify code maintenance and troubleshooting, you should create another procedure to serve as an entry point for event handling - even if it only executes a single call to the target procedure. This basically covers the loadComponentFromURL method, which is responsible for creating, importing, and opening documents. The 0 to 127 ASCII codes correspond to the alphabet and to common symbols (such as periods, parentheses, and commas), as well as some special screen and printer control codes. The cell type is not determined by the content that is saved in the cell, but rather the object property which was used for its entry. which provides LibreOffice with various options for opening and creating documents. To change the search so that InStr is case sensitive, add the parameter 0, as shown in the following example: Using the previous functions for editing strings, programmers can search for and replace one string in another string: The function searches through the transferred Search string in a loop by means of InStr in the original term Source. If a decimal number is assigned to an integer variable, LibreOffice Basic rounds the figure up or down. You can also have loops with an undefined number of passes. Warning: They are listed in the source text without a comma separating the thousand figure: The numbers can be preceded by both a plus (+) or minus (-) sign (with or without a space in between): When you type a decimal number, use a period (.) Note: For detailed information check out our wiki page. 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 following control codes are available in LibreOffice: To insert the control codes, you need not only the cursor but also the associated text document objects. 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). Data sources provide a range of properties, which in turn provide general information about the origin of the data and information about access methods. The page properties that are valid for both types of documents are defined in the com.sun.star.style.PageProperties service. Although you can use the + operator to concatenate strings, the Basic interpreter can become confused when concatenating a number to a string. The service term used in LibreOffice Basic therefore corresponds to the type and class terms used in other programming languages. If it does, the method determines a corresponding object reference by using the getByName method and then saves the reference in a variable in Sheet. This is because the contents of cell A2 were entered as a string and not as a number. This only applies for as long as the SQL command allows the data to be re-written to the database (depends on principle). The following example uses the hasByName method to check if a sheet called MySheet exists. Note: The division between visible program elements (View) and the data or documents behind them (Model) occurs at many places in LibreOffice API. VBA: The rules for constructing markers are different in LibreOffice Basic than in VBA. 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. LibreOffice Basic ensures that variable B is converted to a string during assignment to variable A. 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. Note: This service can be addressed in LibreOffice Basic using the global name StarDesktop. LibreOffice Basic offers complete access to all LibreOffice functions, supports all functions, modifies document types, and provides options for creating personal dialog windows. In place of the $ placeholder, the Format function displays the relevant currency symbol defined by the system (this example assumes a European locale has been defined): The format instructions used in VBA for formatting date and time details can also be used: LibreOffice Basic provides the Date data type, which saves the date and time details in binary format. This automatic renaming works also in reverse when a page is deleted. Function calls, mathematical expressions, and other linguistic elements, such as function and loop headers, must be completed on the same line that they begin on. Double variables are suitable for precise calculations. The DrawPages container of a drawing document is also used to create and delete individual pages. The model object of a form button provides the following properties: Through the ButtonType property, you have the opportunity to define an action that is automatically performed when the button is pressed. The example uses the supportsService method to check whether the TextElement is a paragraph or a table. There is also no limit to the number of drawing elements that you can add to a page. Forms are created using the Form Controls and the Form Design Toolbar directly within the document. More information about working with these buttons is discussed in #Control Elements in Detail. The method for accessing the shape objects of a control element also uses the corresponding drawing level of the document. For example, in the following variable declaration, MyVar1 becomes a variant and MyVar2 becomes an integer: The following sections list the variable types that are available in LibreOffice Basic and describe how they can be used and declared. Routine tasks can therefore be automated in LibreOffice Basic, links can be made to other programs for example to a database server and complex activities can be performed at the press of a button by using predefined scripts. A double variable can take up to eight bytes of memory. For this reason, this algorithm is also known as a Bubble sort. The declaration can only be made using the supplement As Date. LibreOffice Basic dialogs consist of a dialog window that can contain text fields, list boxes, radio buttons, and other control elements. Those format properties that refer to individual characters are described as character properties. You specify the qualifiers in the With statement. Several TextCursor objects can even be opened for the same document and used in various positions, which are independent of one another. Example declaration of a string variable: Note: The com.sun.star.style.CharacterProperties service does not provide any interfaces, but instead offers a range of properties through which character properties can be defined and called. The following parameters can be specified here: The following example is virtually the same as the preceding example, but the Dir function transfers the value 16 as a parameter, which returns the sub-directories of a folder rather than the file names. An instance of the new type is a variable, and follows the usual rules for variable scope (see #Scope and Life Span of Variables). The control element can be reached using Event.Source and its model using Event.Source.Model. The dialog can be reached using Event.Source.Context. The grouping of control elements in LibreOffice Basic is only used to ensure a visual division by drawing a frame around the control elements. The right and left-hand edges of the line extend to their points of intersect with each other (LineJoint = MITER) to form a right-angle. VBA: Different terminology for spreadsheets and their content is used in VBA and LibreOffice Basic. You should instead use Basic object ThisComponent. 13 for LibO, and 1.3, ch. These include. The following call, for example, determines whether the TextElement object supports the com.sun.star.text.Paragraph service. The LibreOffice API provides you with a whole range of objects with which you can create, open and modify Office documents. They can be displayed as 2D or 3D graphics (com.sun.star.chart.Dim3DDiagram service). The first three chapters introduce you to LibreOffice Basic: These chapters provide an overview of LibreOffice Basic and should be read by anyone who intends to write LibreOffice Basic programs. The SetAttr function permits the properties of a file to be changed. To do this, you first create a standard LibreOffice Writer or LibreOffice Calc form and then link the fields to a database. Even the search properties and methods available differ. The associated com.sun.star.chart.ChartArea service supports line and fill properties. The forms created in this way provide all the functions of a full database front end without requiring independent programming work. An example of the use of XNameAccess is provided by the sheets object of a spreadsheet. Bookmarks are created and inserted using the concept already described previously: The example creates a Cursor, which marks the insert position of the bookmark and then the actual bookmark object (Bookmark). The Environ function returns the environmental variables of the operating system. It can be combined with the period as a placeholder for any character. No programming knowledge is needed to use the corresponding functions. The When initiating event is also noteworthy for the following reasons: The properties for the Item Status Changed event are: LibreOffice Basic recognizes a range of control elements which can be divided into the following groups: A button performs an action when you click it. The com.sun.star.view.XPrintable interface, which contains the methods for printing documents. The five most important placeholders within a template are the zero (0), pound sign (#), period (. Every UNO object knows what properties, methods and interfaces it already contains. The properties for formatting headers are: The properties for formatting footers are: The content of headers and footers in a spreadsheet is accessed through the following properties: If you do not need to distinguish between headers or footers for odd and even pages (the FooterIsShared property is False), then set the properties for headers and footers on odd pages. At this point, only some of the abstract aspects of objects, for which the LibreOffice API provides some central interfaces, are discussed. 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. The possible values are: In addition to directly modifying cell content, LibreOffice Calc also provides an interface that allows you to insert, delete, copy, or merge cells. Furthermore, the following methods are provided through the view object of the list box: LibreOffice forms can be directly linked to a database. 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. As in the old API from LibreOffice, searching and replacing text in the new API is also performed using the document object. 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. For example, to create Yes, No and Cancel buttons (value 3) where Cancel is the default (value 512), the parameter value is 3 + 512 = 515. The text frame's insert position is determined by a Cursor object, which is also executed when inserted. 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). The bookmark is then assigned a name and is inserted in the document through insertTextContent at the cursor position. You can also use plus (+) or minus (-) signs as prefixes for decimal numbers (again with or without spaces). Note: Base Guides | LibreOffice Documentation - LibreOffice User Guides en / English documentation / Base Guides Base Guides Download PDF Buy a printed copy Guide Source Files Read in your browser Download PDF Buy a printed copy Download PDF Buy a printed copy Download PDF For detailed information check out our wiki page. It converts a string into a number; however it always expects a period to be used as the decimal point symbol. The As keyword syntax, and the fact that a comma is not used, goes back to the roots of the Basic language. Numbers can be presented in several ways, for example, in decimal format or in scientific notation, or even with a different base than the decimal system. Since other pages of the Developer's Guide . The syntax of such method calls is oriented towards classic functions. en The XIndexAccess and XIndexContainer interfaces are used in objects which contain subordinate objects and which can be addressed using an index. The following example shows a procedure which terminates implementation when the ErrorOccured variable has the value True. The loop counter defines the number of times that the loop is to be executed. This example deactivates the cmdNext button in the Dlg dialog with the aid of the model object from cmdNext. Charts are not treated as independent documents in LibreOffice, but as objects that are embedded in an existing document. creates 4 integer variables which can be described with the expressions MyInteger(1), MyInteger(2), MyInteger(3), and MyInteger(4). If a cell contains a numerical value, then the example changes the formatting correspondingly. The sources from which the drivers take their data is irrelevant to a SDBC user. Buy a printed copy. Its syntax is. When LibreOffice Basic encounters an incorrectly defined variable type in a particular context, an error message is generated. The page properties that only apply to spreadsheet documents are defined in the com.sun.star.sheet.TablePageStyle service. If you move a database table into a spreadsheet, LibreOffice creates a table area which can be updated at the click of the mouse if the original data has been modified. A drawing object for a spreadsheet document, for example, can therefore only exist in conjunction with this one document. A data field contains several variables, which are addressed through an index. The form can be defined using two properties. The interfaces to various LibreOffice applications, which allow for direct access to Office documents. In other words, the methods are assigned (as combinations) to the service in interfaces. LibreOffice provides a programming interface in the form of the Universal Network Objects (UNO). XML-based files can be opened and edited with other programs. Numbers are left-aligned in the cell instead of right-aligned. Unlike most other programming languages, Basic performs type conversion automatically. Variables that are declared in a function or a procedure are called local variables: Local variables only remain valid as long as the function or the procedure is executing, and then are reset to zero. There is, however, one main difference: a Universal Network Object may support several services at the same time. This includes the way in which file names are structured for LibreOffice documents, as well as the format in which files are saved. When using DBG_properties, note that the function returns all properties that the services offered by the object can theoretically support. The com.sun.star.frame.XStorable interface, which is responsible for saving documents. For example, the aforementioned object, which is based on the com.sun.star.frame.Desktop service, can also include other services for loading documents and for ending the program. Furthermore, it creates a data field for two PropertyValue entries named PrinterProperties. The program code then uses the Doc.createInstance call to create the rectangle drawing object as specified by the com.sun.star.drawing.RectangleShape service. The starting point for establishing the text fields present is the TextFields list of the document object. The compiler uses the qualifiers from the With as though they were written in front of the partly-qualified name. In terms of functionality, OptimalWidth is more of a method than a property. In some situations, it is not the actual text of a document, but rather its structure that needs modifying. Global variables are declared in the header section of a module using the keyword Global: Private variables are only available in the module in which they are defined. This code inserts a drawing element in a page and then adds text to the top left corner of the drawing object using the TextVerticalAdjust and TextHorizontalAdjust properties. The, a Boolean variable which specifies whether the, com.sun.star.text.textfield.CharacterCount. Any number of documents can be opened in this way in LibreOffice Basic and then edited using the returned document objects. Possible formats are: The following functions form the counterpart to the DateSerial and TimeSerial functions: These functions extract the date or time sections from a specified Date variable. The variable Rect determines the position and size of the chart within the first sheet in the spreadsheet document. There are no practical limits on the indexes or on the number of elements in an array, so long as there is enough memory: Note: LibreOffice Developer's Guide: Chapter 11 - LibreOffice Basic < Documentation | DevGuide Contents 1 First Steps with LibreOffice Basic 1.1 Step By Step Tutorial 1.2 Creating a Module in a Standard Library 1.3 Writing and Debugging a Basic UNO program 1.4 Calling a Sub from the User Interface 1.5 Creating Dialogs 1.6 Adding Event Handlers Example: Suppose that in your Basic library you have a module named PrintDoc. VBA: The VBA option for issuing list entries with a numerical additional value (ItemData) does not exist in LibreOffice Basic. The preceding Filename and Title properties are of the string type. It calls a text document, which contains a StyleFamilies object and uses this to in turn make the paragraph templates (ParagraphStyles) of the document available. com.sun.star.awt.UnoControlTimeField, A numeric field makes it possible to enter, display and edit formatted numeric values. The following values are available: The following example computes the average value of the A1:C3 range and prints the result in a message box: The clearContents method simplifies the process of deleting cell contents and cell ranges in that it deletes one specific type of content from a cell range. VBA: Unlike VBA, you cannot insert option buttons in a group of control elements in LibreOffice Basic. Note: In addition to the properties for characters (com.sun.star.style.CharacterProperties service, refer to #Text Documents) and lines (com.sun.star.drawing.LineStyle service, refer to #Drawings and Presentations), it provides the following properties: For the primary axes grids and sub grids can be displayed, matching to the major and minor intervals. 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. This reflects the content of a table or the result of a SQL-SELECT command. Since however, the paragraph portions are edited directly, their formatting information is retained when replacing the string. Note: Whereas in VBA the paragraphs are accessed by their number (for example, by the Paragraph(1) call), in LibreOffice Basic, the Enumeration object described previously should be used. If the calls to SetModuleB and ShowVarB are independent, e.g. In addition to the FillTransparence property, the com.sun.star.drawing.FillProperties service also provides the FillTransparenceGradient property. Functions and procedures can only be called up if all the necessary parameters are passed during the call. It inserts a new sheet with the name specified by the first argument, at the position specified by the second argument. Note: In so doing, the name of the proper com.sun.star.text.TextFrame service should be specified. The FileProperties array has two elements, one for each option used. When working with 3D charts, a Z-axis is also sometimes provided. Then you can use the "perpetual" Do Loop: The WhileWend loop construct works exactly the same as the Do WhileLoop, but with the disadvantage that there is no Exit command available. If the file name contains sub-directories, then these are separated by a single forward slash, not with a backslash usually used under Windows. StarOffice 5: The Value, String, and Formula properties supersede the old PutCell method of StarOffice 5 for setting the values of a table cell. A string consists of a sequence of consecutive individual characters. Microsoft based its Windows product on the American National Standards Institute (ANSI) character set, which was gradually extended to include characters that are missing from the ASCII character set. In this example, the return value of the function is 123. To make the fill transparent, set the FillTransparence property to 100. Download PDF. LibreOffice Basic also offers several other services through which you can modify such properties, as formatting or apply fills. The Form Functions Toolbar is used for editing forms. Cells cannot be formatted by column in LibreOffice Basic. The descriptor objects for searching and replacing in spreadsheet documents are not created directly through the document object, but rather through the Sheets list. When working with spreadsheets, an intermediate stage is needed for the Sheets list because the drawing levels are not located directly in the document but in the individual sheets: As is already suggested by the GetByIndex method name, a document may contain several forms. An example for the grouped option button: Text fields allow users to type numbers and text. Here, the methods are called directly by means of the relevant object. No action is performed to check if the status of the control element has actually changed. The location of individual cells in a cell range can be determined using the getCellByPosition method, where the coordinates of the top left cell in the cell range is (0, 0). 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). The getCount and getByIndex methods allow the list to be further processed and belongs to the com.sun.star.table.XtableRows interface. 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.
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