Page 5: Application 2: Specifying the Graph Colors

[ashimo]

Application 2: Specifying the graph colors

The graphs that we have looked at so far have all used preset colors. We can, however, use options to change the graph color.

Create the 'Try 4-3' Project

Close the Try 4-2 project and then, from the IDE 'File' menu, select 'New Project'. In the 'New Project' dialog box, select “Applet Project” (1), input “Try4-3” (2), specify c:\Curl\lesson\Try4\03_graph_color in the “Directory” field (3), set the API Version to 6.0 (4), and then click OK (5).


Inputting the Program

Next, we’ll input the program. You can copy the program code below or use c:\Curl\Try4\03_graph_color\start.curl and then paste it into the editor in the IDE.

Code:

{curl 6.0 applet}
{curl-file-attributes character-encoding = utf8}
{applet manifest = manifest.mcurl,
    {compiler-directives careful? = true}
}
{import * from CURL.GUI.CHARTS}
{value
    let data:RecordSet =
        {RecordSet
            {RecordFields
                {RecordField name, domain = String},
                {RecordField age, domain = int},
                {RecordField score, domain = int}
            },
            {RecordData name = Matt, age = 33, score = 88},
            {RecordData name = Sarah, age = 27, score = 79},
            {RecordData name = Jacob, age = 26, score = 90}
        }
    
    let color-array:{Array-of FillPattern} =
        {{Array-of FillPattern} orange, pink}
    
    let chart:LayeredChart =
        {LayeredChart
            height = 5cm,
            width = 10cm,
            color-palette = color-array,
            {BarLayer
                x-axis-data = {ChartDataSeries data, name},
                {ChartDataSeries data, age},
                {ChartDataSeries data, score}
            }
        }
    chart
}

Save the File, and then Execute the Program

After inputting the code, save the file, and then execute the program. The following result will appear in your browser.


The samples that we have looked at so far have all used preset colors for the graphs. Here, we have set whatever color we like for our graph display.