Once you determine what kind of chart is best for your project, you can read more about what is needed for the CanvasJS implementation here.įor a project I was recently working on, I wanted to show who a federal legislator's top financial contributors were. I felt that this information was best conveyed as a column chart. CANVASJS COLORSET TWO COLUMN CODEīelow, I will walk through how I implemented that code and used the chart as a component.īelow is a file tree that includes the relevant components needed for this chart:Ĭlass App extends Component */ / > ![]() I, however, needed my component to iterate through an array of objects, and then each of those objects would be a different 'dataPoint', which contained both a label and a y-coordinate. I also wanted the title's text to have a dynamic title depending on the props passed into it. In order to iterate through my array of objects, I created a function in the ContributionChart class called eachContributor which maps through the contributors prop, and returns a single data point. Then, in render, dataPoints is set equal to this.eachContributor(). The way to get this to work (to put those charts together), is to work with what's called "parent charts" and "child charts", as explained within Steps to create charts using the views UI.In order to dynamically display the title of the chart, I simply passed the props into the text. More specifically what's detailed within the paragraph "Creating Multiple Series and Combo Charts in the UI". you can combine multiple charts on top of each other. The "parent" chart provides the global information, such as the height, width, title, and other properties. Charts that are "children" provide only data and (optionally) a secondary axis. The "Chart Add-on" type is added the same way you would add a new Page or Block display, from the "+ Add" menu at the top of the view configuration.Īfter this new display has been added, find the setting for "Combine with parent chart" and change this value to point at the parent chart you have already assembled.Īfter you've assembled the first series of data in your chart according to the instructions in the Creating Charts using the Views UI section, add a new display to the same view of the type "Chart Add-on". Then adjust the settings for the child chart to pull in different data (often by overriding the filter settings). Now you can go back to your parent display, and see that the results from the child chart have been merged into the results from the parent chart. You can even use this approach to combine different types of charts, such as a line chart over the top of a column chart. Note that not all chart types can be combined together and invalid combinations may cause your chart to throw errors. These fields with these "machine names" (+ values): The chart below (created using the "charts" module) shows aĬombination chart about all nodes of content type "Article", which has Refer to " Combination chart without aggregation" for an online demo of such chart." field_optionlist" (with some select list values, such as the "year")." field_free_format_text" (assumed to contain some numeric values), with Y-axis left, is used in the parent chart. ![]()
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