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9 C H A P T E R 9 9 Charts (Diagrams) OpenOffice.org can display data as a chart, which creates graphical representations of numerical data in the form of bars, pie charts, lines or other elements. Data can either be displayed as 2D or 3D graphics, and the appearance of the chart elements can be individually adapted in a way similar to the process used for drawing elements. Charts are not treated as independent documents in OpenOffice.org, but as objects that are embedded in an existing document. A chart may contain its own data or may display data from the container document. For example charts in spreadsheets can display data obtained from the cell ranges and charts in text documents can display data obtained from writer tables. Using Charts in Spreadsheets Charts within spreadsheets can display the data from an assigned cell range within the spreadsheet. Any modifications made to the data within the spreadsheet will also be reflected in the assigned chart. The following example shows how to create a chart assigned to some cell ranges within a spreadsheet document: Dim Doc As Object Dim Charts As Object Dim Chart as Object Dim Rect As New com.sun.star.awt.Rectangle Dim RangeAddress(0) As New com.sun.star.table.CellRangeAddress Doc = ThisComponent Charts = Doc.Sheets(0).Charts Rect.X = 8000 Rect.Y = 1000 Rect.Width = 10000 Rect.Height = 7000 RangeAddress(0).Sheet = 0 RangeAddress(0).StartColumn = 0 RangeAddress(0).StartRow = 0 RangeAddress(0).EndColumn = 2 RangeAddress(0).EndRow = 12 Charts.addNewByName("MyChart", Rect, RangeAddress(), True, True) Although the code used in the example may appear to be complex, the central processes are limited to three lines. The first central line creates the Doc document variable, which references the current spreadsheet document (Doc line = StarDesktop.CurrentComponent). The code used in the example then creates a list containing all charts of the first spreadsheet (Charts line = Doc.Sheets(0).Charts). Finally, in the last line, a new chart is added to this list using the addNewByName method. This new chart is then visible to the user. The variable RangeAddress determines the assigned cell range whose data will be displayed within the chart. The variable Rect determines the position and size of the chart within the first sheet in the spreadsheet document. 131
Using Charts in Spreadsheets The previous example creates a bar chart. If a different chart type is needed, then the bar chart must be explicitly replaced: Chart = Charts.getByName("MyChart").embeddedObject Chart.Diagram = Chart.createInstance("com.sun.star.chart.LineDiagram") The first line defines the corresponding chart object. The second line replaces the current chart with a new one — in this example, a line chart. Note – VBA : In Microsoft Excel, a distinction is made between charts which have been inserted as a separate page in a Microsoft Excel document and charts which are embedded in a table page. Correspondingly, two different access methods are defined there for charts. This distinction is not made in OpenOffice.org Basic, because charts in OpenOffice.org Calc are always created as embedded objects of a table page. The charts are always accessed using the Charts list of the associated Sheet object. The Structure of Charts The structure of a chart, and therefore the list of services and interfaces supported by it, depends on the chart type. For example, the methods and properties of the Z-axis, are available in 3D charts, but not in 2D charts, and in pie charts, there are no interfaces for working with axes. Title, Subtitle and Legend Title, subtitle and legend are basic elements provided for every chart. The Chart object provides the following properties for administrating these elements: HasMainTitle (Boolean) activates the title Title (Object) object with detailed information about the chart title (supports the com.sun.star.chart.ChartTitle service) HasSubTitle(Boolean) activates the subtitle Subtitle (Object) object with detailed information about the chart subtitle (supports the com.sun.star.chart.ChartTitle service) HasLegend (Boolean) activates the legend Legend (Object) object with detailed information about the legend (supports the com.sun.star.chart.ChartLegend service) Both services com.sun.star.chart.ChartTitle and com.sun.star.chart.ChartLegend do support the service com.sun.star.drawing.Shape. This allows to determine the position and size of the elements using the Position and Size properties. As the size of the legend and the titles is calculated automatically based on the current content and the character height for example, the size property provides read access only. 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. com.sun.star.chart.ChartTitlecontains not only the listed formatting properties, but also two other properties: String (String) text which to be displayed as the title or subtitle 132 OpenOffice.org 3.2 BASIC Guide · March 2010
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OpenOffice.org 3.2 BASIC Guide
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3 1 2 3 4 Contents Copyright.......
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Preface This guide provides an intr
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About OpenOffice.org Basic and allo
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Overview of a Basic Program In addi
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Working With Variables example, in
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Numbers with long integer variables
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Numbers return incorrect values. Th
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Arrays Dim MyInteger(3) creates 4 i
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Scope and Life Span of Variables Sc
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Constants Const A = 10 You can also
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Branching B = 0 End If In this exam
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Loops use an explicit counter like
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Procedures and Functions ' ... here
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Procedures and Functions The exampl
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Error Handling The following code i
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Other Instructions End Sub & "Text:
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Conversion Functions calculates the
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Conversion Functions IsBoolean = Fa
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Strings Formatting Strings The Form
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Date and Time The Weekday function
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Files and Directories Note - VBA :
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Files and Directories The FreeFile
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Message and Input Boxes Display of
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Other Functions specifies the same
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Universal Network Objects (UNO) com
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Tools for Working with UNO The foll
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Overview of Central Interfaces basi
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5 C H A P T E R 5 5 Working with
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XML File Format The StarDesktop Ope
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The StarDesktop The FileProperties
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The options of the print method The
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Doc = ThisComponent StyleFamilies =
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6 C H A P T E R 6 6 Text Documen
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described in Search and Replace. Th
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Paragraph Properties The Structure
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If TextElement.supportsService("com
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isEndOfSentence () returns True if
Page 77 and 78: Doc.Text.insertControlCharacter(Cur
Page 79 and 80: Dim Replace As Object Dim BritishWo
Page 81 and 82: More Than Just Text Note - Text tab
Page 83 and 84: Doc.Text.insertTextContent(Cursor,
Page 85 and 86: frame objects are set to the starti
Page 87 and 88: The following example shows how the
Page 89 and 90: 7 C H A P T E R 7 7 Spreadsheet
Page 91 and 92: The same interface provides methods
Page 93 and 94: Cell = Sheet.getCellByPosition(0, 0
Page 95 and 96: StartColumn (long) first column in
Page 97 and 98: You can apply all of the named prop
Page 99 and 100: NumberFormatId = NumberFormats.addN
Page 101 and 102: ShadowFormat (struct) The Structure
Page 103 and 104: FooterBottomBorderDistance (long) d
Page 105 and 106: Definition of Elements to be Printe
Page 107 and 108: VARP variance based on the total po
Page 109 and 110: 8 C H A P T E R 8 8 Drawings and
Page 111 and 112: Doc = ThisComponent Page = Doc.Draw
Page 113 and 114: RectangleShape.Position = Point Rec
Page 115 and 116: The lines are dark gray (Color) and
Page 117 and 118: service. Dim Doc As Object Dim Page
Page 119 and 120: An Overview of Various Drawing Obje
Page 121 and 122: Page.add(LineShape) Polypolygon Sha
Page 123 and 124: AdjustBlue (Short) blue value as a
Page 125 and 126: Point.x = 1000 Point.y = 1000 Size.
Page 127: Pause (long) the amount of time tha
Page 131 and 132: The Structure of Charts com.sun.sta
Page 133 and 134: The Structure of Charts Min (Double
Page 135 and 136: The Structure of Charts HasZAxisGri
Page 137 and 138: The Structure of Charts The followi
Page 139 and 140: 10 C H A P T E R 1 0 10 Database
Page 141 and 142: User (String) user name Password (S
Page 143 and 144: Dim Statement As Object Dim ResultS
Page 145 and 146: FORWARD_ONLY ResultSet only permits
Page 147 and 148: 11 C H A P T E R 1 1 11 Dialogs
Page 149 and 150: Closing With the Close Button in th
Page 151 and 152: Multi-Page Dialogs Properties A dia
Page 153 and 154: Control element-specific events: Ev
Page 155 and 156: Buttons (short) X (long) Y (long) b
Page 157 and 158: Temporary (Boolean) the focus is te
Page 159 and 160: Model.Label (String) label that is
Page 161 and 162: Model.HScroll (Boolean) the text ha
Page 163 and 164: 12 C H A P T E R 1 2 12 Forms In
Page 165 and 166: Accessing the View of Control Eleme
Page 167 and 168: Tag (String) Control Element Forms
Page 169 and 170: Enabled (Boolean) the control eleme
Page 171 and 172: LineCount (Short) number of lines o
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