Whereas control elements appearing one after another in dialogs are automatically combined to form a group, grouping in forms is performed on the basis of names. For example, you can create a rectangle and then insert another rectangle inside it to create a hole in the original rectangle: With respect as to which areas are filled and which areas are holes, LibreOffice applies a simple rule: the edge of the outer shape is always the outer border of the polypolygon. If the user presses several keys to output a single character (for example, to add an accent to a character), then LibreOffice Basic only creates one event. The characters are not rotated. There are, however, a few key differences: Users who want to provide their forms with their own methods for event handling, should refer to the #Dialogs chapter. Here are a few examples: The following example shows how all empty lines in a text document can be removed with the help of the regular expression ^$: So far, this chapter has only dealt with text paragraphs and their portions. This is not the case for new documents. To compare the differences between different SQL dialects, the SDBC components from LibreOffice have their own SQL parser. The following program code shows how the Step value in event handlers of the Next and Prev buttons can be increased or reduced and changes the status of the buttons. If the user clicks the Cancel button or closes the window, the. as is the case in the previous example for paragraphs. LibreOffice control elements recognize different types of events that can be triggered in different situations. The previous example creates a bar chart. 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. 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. Each of these sub-objects contains its own formatting information. Through the API, for example, documents can be created, opened, modified and printed. 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. If on the other hand, the example encounters another field, then it displays the information unknown. A drawing object for a spreadsheet document, for example, can therefore only exist in conjunction with this one document. In addition to the Yes and No states, a check box can have an in-between state if the corresponding Yes or No status has more than one meaning or is unclear. The Sheets container of a spreadsheet document is also used to create and delete individual sheets. The interface between the API and various programming languages is provided by something called Universal Network Objects (UNO). Chapter 1. Buy a printed copy. Write the qualifiers in order, from outer to inner: These names may also be described as, "concatenated with the dot-operator ('.')". 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. Even the search properties and methods available differ. The associated constants are defined in the com.sun.star.sheet.GeneralFunction enumeration. In the second example, the page is accessed by its name and the getByName method. Write it before the inner name, and separate it by a period: Since containers may hold other containers, you may need more than one qualifier. 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 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. A recursive procedure or function is one that has the ability to call itself until it detects that some base condition has been satisfied. If a different chart type is needed, then the bar chart must be explicitly replaced: The first line defines the corresponding chart object. 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! This property receives a PropertyValue data field with the following settings: The following example shows how a printer can be changed and the paper size set with the help of the Printer property. StarOffice 5: StarDesktop.loadComponentFromURL supersedes the Documents.Add and Documents.Open methods from the old LibreOffice API. This example shows how a text can be searched for the word "turnover" and the results formatted in bold type. For more in-depth information please refer to the OpenOffice.org BASIC Programming Guide on the Wiki. You can add a shadow to most drawing objects with the com.sun.star.drawing.ShadowProperties service. The LibreOffice Developer's Guide describes the LibreOffice API in more detail than this guide, but is primarily intended for Java and C++ programmers. A string consists of a sequence of consecutive individual characters. (When listing the service name of a text field, uppercase and lowercase characters should be used in LibreOffice Basic, as in the previous example.). The code used in the example first checks whether the database is password protected. Again, the second parameter specifies the number of columns that you want to delete. ThisComponent returns the currently active document. These are defined in the com.sun.star.text.TextTable service. In LibreOffice Basic, use the keyword Const to declare a constant. 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. In LibreOffice, various types of charts can be displayed in a stacked form. Charts are not treated as independent documents in LibreOffice, but as objects that are embedded in an existing document. To make the fill transparent, set the FillTransparence property to 100. 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). Note: 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. VBA: LibreOffice Basic does not support the VBA Like comparison operator. Several TextCursor objects can even be opened for the same document and used in various positions, which are independent of one another. Base uses the HSQLDB database engine to create database documents. VBA: Compatibility between LibreOffice Basic and VBA relates to the LibreOffice Basic language as well as the runtime library. If nothing is assigned, the function returns a zero value (number 0 for numerical values and a blank for strings). The Chart object provides the property Diagram which forms the coordinate system with axes and grids, where the data finally is displayed: Different services are supported depending on the chart type (see #Chart Types). 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. More extensive navigation options, such as the possibility of modifying values, are therefore not included. It provides the functions for the frame object of LibreOffice, under which all document windows are classified. 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. The Model property provides program-controlled access to the model of dialog and control element objects. By using Option Compatible, LibreOffice Basic behaves like VBA. Dialogs such as this one are described as modal because they do not permit any other program action until they are closed. A table is usually accessed in LibreOffice through the ResultSet object. This guide provides an introduction to programming with LibreOffice Basic. Note: A database is incorporated into LibreOffice by creating what is commonly referred to as a data source. The following is an example of a search and replace process: This example uses the first page of the document to create a ReplaceDescriptor and then applies this to all pages in a loop. A complete list of all character properties can be found in the LibreOffice API reference. Note: The column objects support the com.sun.star.table.TableColumn service that has the following properties: The width of a column is only optimized when the OptimalWidth property is set to True. The view of the control element can then be determined with the assistance of the model and using the document controller. The following example shows how the rows of a table can be retrieved and formatted. Unlike the data sources presented in the previous section, the database connection must therefore be re-established every time the program is restarted. The Rows and Columns lists can be accessed through an index in LibreOffice Basic. If the operators are applied to Boolean values, the operation provides the result required directly. OpenOffice.org BASIC Programming Guide 2 OpenOffice. A control element of a form has three aspects: The models of the control elements of a form are available through the GetByName method of the Object form: The example determines the model of the MyListBox control element, which is located in the first form of the text document currently open. 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. Character objects in UNO, for example, provide the getPosition and setPosition methods through which the associated key point can be called up and changed. Every chart has a background area. The real API call is: Sheet.getColumns.getByIndex(1). A corresponding source text can be seen in the previous example. As with classic variable assignment, the function in this example returns the value that was last assigned to it. Each page in the presentation is a slide. This is an instance of the example function described in #Search and Replace. The com.sun.star.frame.XStorable interface, which is responsible for saving documents. Properties are like the properties of an object; for example, Filename and Title for a Document object. In this guide, a table-based document or spreadsheet document is the entire document, whereas a spreadsheet (or sheet for short) is a sheet (table) in the document. Since however, the paragraph portions are edited directly, their formatting information is retained when replacing the string. com.sun.star.awt.UnoControlCurrencyField. Combo boxes (com.sun.star.awt.UnoControlComboBox service) support the following properties: Tree boxes (com.sun.star.awt.tree.TreeControlModel service) support the following properties: In many respects, the structure of LibreOffice forms corresponds to the #dialogs. The type is declared in the same way as a variable declaration: If the return type is not specified (see first example of this page), the function returns a variant. The following example shows how the models of the control elements of a group can be iterated, exemplary displaying the states of all control elements in a given group: The code corresponds to the previous example for determining a simple control element model. The return value is provided as a bit mask in which the following values are possible: The following example determines the bit mask of the test.txt file and checks whether this is read-only whether it is a directory. The copyRange method functions in the same way as the moveRange method, except that copyRange inserts a copy of the cell range instead of moving it. Note: However, in drawing documents the descriptor objects for searching and replacing are not created directly through the document object, but rather through the associated character level. LibreOffice Basic returns the name of the first directory entry found. The object variable created must then be initialized so that it can be used. The second parameter of insertCells contains a value of the com.sun.star.sheet.CellInsertMode enumeration and defines what is to be done with the values that are located in front of the insert position. All the properties of the SearchDescriptor described in the previous paragraph are also supported by ReplaceDescriptor. The values are interchanged as pairs several times until they are finally sorted in ascending order. Originally, single variables were used to reduce the computing time required for the more precise double variables. The entire array can record a total of 6 x 6 = 36 integer values. Basic knowledge of the way in which databases function and the SQL query language is however needed to fully understand the following sections. Whereas VBA uses the Document.Frames.Add method for this purpose, creation in LibreOffice Basic is performed using the previous procedure with the aid of a TextCursor as well as the createInstance method of the document object. The chart wall is the background of the coordinate system where the data is plotted. The model object of a checkbox form provides the following properties: The model objects of text field forms offer the following properties: The model object of the list box forms provides the following properties: Note: Buy a printed copy. However, the names are not case-sensitive. Conversely, spreadsheet data can be moved to a database table and a database import performed. If you want to use such a name, you must tell Basic where to look. 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. This type of assignment, however, can cause errors, date and time values are defined and displayed differently in different countries. In VBA, you can also use the keyword ByRef to force a parameter to be passed by reference. The waiting period is specified in milliseconds. its spell checker, forms designer, and charting tools). This code shows that you do not get the type that you specify. Below, you will find a list of the most important text fields and their associated properties. More information about working with styles can be found in the '''#Default values for character and paragraph properties''' section in #Text Documents. 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. Every UNO object knows what properties, methods and interfaces it already contains. Finally, the following information symbols are available and can also be displayed by adding the relevant parameter values: The following call displays an information box with the Yes and No buttons (value 4), of which the second button (No) is set as the default value (value 256) and which also receives a question mark (value 32), 4+256+32=292. Whereas the document object in VBA is called a Workbook and its individual pages Worksheets, they are called SpreadsheetDocument and Sheet in LibreOffice Basic. The structure for hatches has the following properties: The following example demonstrates the use of a hatch structure: This code creates a simple hatch structure (HatchStyle = SINGLE) whose lines are rotated 45 degrees (Angle). The following example checks whether the date saved in MyDate is in the year 2003. The insertByName line inserts the NewStyle style under the name of the same name in the ParagraphStyles object. 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