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Required plugins for this example: MBS ChartDirector Plugin
You find this example project in your Plugins Download as a Xojo project file within the examples folder: /ChartDirector/treemapcolors
This example is the version from Fri, 29th Apr 2021.
Project "treemapcolors.xojo_binary_project"
Class App Inherits Application
Const kEditClear = "&Delete"
Const kFileQuit = "&Quit"
Const kFileQuitShortcut = ""
End Class
Class MainWindow Inherits Window
EventHandler Sub Open() CDBaseChartMBS.ScaleFactor = 2 // The first level nodes of the tree map. There are 3 nodes. Dim allRegions() As String = Array("Alpha", "Beta", "Gamma") // Each first level node branches to become 7 second level nodes. Dim energy_types() As String = Array("Coal", "Oil", "Gas", "Nuclear", "Hydro", "Solar", "Wind") Dim energy_types_size as Integer = energy_types.Ubound + 1 // Colors for the second level nodes. Dim colors() As Integer = Array(CType(&h222222, Integer), &h666666, &h884488, &hcc0000, &h3366cc, &h33cc33, &h77bbff) // The data for the 3 groups of second level nodes Dim region0() As Double = Array(0.0, 50, 70, 0, 60, 120, 140) Dim region1() As Double = Array(200.0, 50, 30, 65, 60, 40, 40) Dim region2() As Double = Array(0.0, 100, 70, 100, 60, 35, 40) // Create a Tree Map object of size 600 x 520 pixels Dim c As New CDTreeMapChartMBS(600, 520) // Add a title to the chart Call c.addTitle("Energy Usage by Region", "Arial Bold Italic", 18) // Set the plotarea at (10, 35) and of size 480 x 480 pixels c.setPlotArea(10, 35, 480, 480) // Obtain the root of the tree map, which is the entire plot area Dim root As CDTreeMapNodeMBS = c.RootNode // Add first level nodes to the root. We do not need to provide data as they will be computed as // the sum of the second level nodes. dim emptyArray() as double root.setData(emptyArray, allRegions) // Add second level nodes to each of the first level node root.Node(0).setData(region0, energy_types, colors) root.Node(1).setData(region1, energy_types, colors) root.Node(2).setData(region2, energy_types, colors) // Get the prototype (template) for the first level nodes. Dim nodeConfig As CDTreeMapNodeMBS = c.getLevelPrototype(1) // Set the label format for the nodes to show the label with 8pt Arial Bold font in // semi-transparent black color (&h77000000). Put the text at the top left corner of the cell. nodeConfig.setLabelFormat("{label}", "Arial Bold", 18, &h77ffffff, CDBaseChartMBS.kTopLeft) // Set the border color to white (ffffff). Use 2 pixel thick flat border style. nodeConfig.setColors(-1, &hffffff, CDBaseChartMBS.flatBorder(2)) // Get the prototype (template) for the second level nodes. Dim nodeConfig2 As CDTreeMapNodeMBS = c.getLevelPrototype(2) // Set the label format for the nodes to show the label and value with 8pt Arial Bold font. Put // the text at the center of the cell. nodeConfig2.setLabelFormat("{label}<*br*>{value}MW", "Arial Bold", 8, &hffffff, CDBaseChartMBS.kCenter) // Set the border color to white (ffffff) nodeConfig2.setColors(-1, &hffffff) // Add a legend box at (500, 35) with 12pt Arial font and transparent background and border. Dim b As CDLegendBoxMBS = c.addLegend(500, 35, True, "Arial", 12) b.setBackground(CDBaseChartMBS.kTransparent, CDBaseChartMBS.kTransparent) // Add the legend keys for the colors For i As Integer = 0 To energy_types_size - 1 b.addKey(energy_types(i), colors(i)) Next // Output the chart pic = c.makeChartPicture // drawn in paint event End EventHandler
EventHandler Sub Paint(g As Graphics, areas() As REALbasic.Rect) If pic <> Nil Then // scale to window g.DrawPicture pic, 0, 0, g.Width, g.Height, 0, 0, pic.Width, pic.Height End If End EventHandler
Property pic As Picture
End Class
MenuBar MainMenuBar
MenuItem FileMenu = "&File"
MenuItem FileQuit = "#App.kFileQuit"
MenuItem EditMenu = "&Edit"
MenuItem EditUndo = "&Undo"
MenuItem EditSeparator1 = "-"
MenuItem EditCut = "Cu&t"
MenuItem EditCopy = "&Copy"
MenuItem EditPaste = "&Paste"
MenuItem EditClear = "#App.kEditClear"
MenuItem EditSeparator2 = "-"
MenuItem EditSelectAll = "Select &All"
End MenuBar
End Project

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