libreoffice basic programming guide pdf

The FilterOptions property contains the description of the syntax of the csv file. If you click on Yes, the new or changed styles will be copied into the document. Example declarations for integer variables: Long integer variables can store any whole number between 2147483648 and 2147483647. However, this call does not affect the UNO sequences that are defined through the LibreOffice API whose index always begins with 0. Some UNO services in turn support other services so that, through one object, you are provided with a whole range of services. Every UNO object knows what properties, methods and interfaces it already contains. The Goto ErrorHandler ensures that LibreOffice Basic exits the current program line and then executes the ErrorHandler: code. The same interface provides methods moveByName and copyByName. This object allows you to directly access the content of a dialog or control element. 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 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). A string variable can store up to 65535 characters. Whereas the document object in VBA is called a Workbook and its individual pages Worksheets, they are called SpreadsheetDocument and Sheet in LibreOffice Basic. LibreOffice Basic predefines several constants. This can be compared with highlighting a point in the text using the mouse. 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. Focus events indicate if a control element receives or loses focus. Paragraph portions displayed in bold type are marked using a HTML element when exporting. The XIndexContainer interface provides the insertByIndex and removeByIndex functions. The control element can be reached using Event.Source and its model using Event.Source.Model. The endDialog method of the dialog is an improvement of endExecute. If you are not sure of the form of a control element, you can use the option for searching through all forms for the control element required: The example uses the HasByName method to check all forms of a text document to determine whether they contain a control element model called MyListBox. Once the Dlg dialog object has been initialized, you can use the Execute method to display the dialog. Finally, LibreOffice provides a mechanism for forms based on databases. If the corresponding page does not exist, it is created and inserted in the drawing document by the insertNewByIndex method. Depending on the relevant document types, LibreOffice recognizes a whole range of different types of styles. The Diagram object provides the following properties to access the axes: The axis objects of a LibreOffice chart support the com.sun.star.chart.ChartAxis service. To make the fill transparent, set the FillTransparence property to 100. 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. Originally, single variables were used to reduce the computing time required for the more precise double variables. Since control element forms within the documents are administered like a special drawing element, there is also a, This page was last edited 13:55:11, 2022-12-07 by, Please note that all contributions to The Document Foundation Wiki are considered to be released under the. The document object of a spreadsheet is based on the com.sun.star.sheet.SpreadsheetDocument service. The counting variable of the loop therefore runs from 0 to getCount()-1. FileNo is the handle created by the FreeFile function. The following explanations relate to working with text files (not text documents). The structure of the associated event objects is defined in the com.sun.star.awt.MouseEvent structure which provides the following information: The constants defined in com.sun.star.awt.MouseButton for the mouse buttons are: The following example outputs the mouse position as well as the mouse button that was pressed: Note: 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. 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. The following example outlines the replacement process within a drawing: This code uses the first page of the document to create a ReplaceDescriptor and then applies this descriptor in a loop to all the pages in the drawing document. The TextCursor object in LibreOffice Basic acts independently from the visible cursor in a text document. The return value of a function can be any type. This service defines the Size and Position properties of a drawing object. This provides the methods for saving, exporting and printing documents. You can also benefit from the advantages of object-oriented programming since an interface in LibreOffice Basic enables you to use external object libraries. This example shows how you may define and use a struct, and how to reference the items within it, both with and without With. The minimum value of the Y-axis is fixed to 0 and the maximum value is fixed to 100 so that the resolution of the chart is retained even if the values are changed. By convention, the symbolic names given below are written in UPPERCASE, to mark them as predefined, rather than user-defined. If the operators are applied to Boolean values, the operation provides the result required directly. To make your code easier to read, you should assign meaningful names to these procedures. This code determines the object for the MyButton control element and then initializes the Ctl object variable with a reference to the element. 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 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. The example first creates a text field which supports the com.sun.star.text.textfield.PageNumber service. The com.sun.star.presentation.PresentationDocument service, responsible for presentation documents, also provides the complete com.sun.star.drawing.DrawingDocument service. It can, for example, be moved into the next line if a line break occurs. Here is an list of the most important properties of the table object: A table consists of a list containing rows. The StyleFamilies are accessed by means of the document object: The example uses the StyleFamilies property of a spreadsheet document to establish a list containing all available cell styles. as the decimal point. The example creates a text frame, inserts this in the current document and opens a TextCursor for the text frame. You can move the data from one list to the other using the buttons between the two list boxes. Thus, it provides a consistent interface for users who navigate by mouse or by keyboard. A simple way is to declare it as a Private or Public variable common to the main dialog routine and the event routine. 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. 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. In addition to inserting text fields, searching a document for the fields can also be an important task. The values for selecting the buttons are: To set a button as the default button, add one of the following values to the parameter value from the list of button selections. If nothing is assigned, the function returns a zero value (number 0 for numerical values and a blank for strings). Note: the property is unclear. More information about working with styles can be found in the '''#Default values for character and paragraph properties''' section in #Text Documents. A double variable can take up to eight bytes of memory. If a style in the template has been changed, and you open a document created with that template, you will see a message asking whether to update the styles in the document. Constants have the same scope as variables (see #Scope_of_Variables Scope and Life Span of Variables), but the syntax is slightly different. The following example creates a line chart. The same applies when attempting to assign a string to a Boolean variable: Again, the basic interpreter reports an error. There are passed through in turn in a loop. The bookmarks can either be accessed by their number or their name. It only allows iteration to be applied forward, and for values to be interrogated. In the same way, the following example checks whether MyTime is between 12 and 14 hours. To avoid such blind events, save the old control element value in a global variable, and then check to see if the value has changed when an event is executing. The following example shows how four lines of a mathematical expression can be linked: Note: The status information remains valid until the program encounters a Resume or On Error command, whereupon the information is reset. The entire LibreOffice API is based on these interfaces, which are described in more detail in the following chapters of this document. To get the most out of this book, you should be familiar with other programming languages. The second parameter of Dir specifies whether files or directories are to be searched for. To prevent this effect, the user can access the associated paragraph portions rather than the entire paragraph. VBA: In LibreOffice Basic, the expression Option Base 1 does not affect the number of elements in an array as it does in VBA. For more information, see the LibreOffice API reference. 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. A spreadsheet is based on these interfaces, which are described in more detail in the applies... Properties of a spreadsheet is based on these interfaces, which are described more! Contains the description of the dialog is an improvement of endExecute service defines the and. Your code easier to read, you are provided with a whole of! Be accessed by their number or their name store any whole number between 2147483648 and 2147483647 from the cursor. List containing rows: a libreoffice basic programming guide pdf consists of a function can be any type the API. 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