Create your first ZK Charts

In this section, we will show how to create your first ZK Charts component step by step.

A Very Basic Chart

First, declare a chart component in a ZUML document. Specify type and title properties.

chart.zul

<charts id="chart" type="line" title="Season Average Temperature" 
    apply="org.zkoss.zkcharts.essentials.FirstChartComposer"/>

Use model to handle chart data, and set model to chart in a Controller which extends SelectorComposer

First ChartComposer.java

public class FirstChartComposer extends SelectorComposer<Component> {
    @Wire
    Charts chart;

    public void doAfterCompose(Component comp) throws Exception {
        super.doAfterCompose(comp);
        // Create a predefined implementation category model
        CategoryModel model = new DefaultCategoryModel();

        // Set value to the model
        model.setValue("Tokyo", "Spring", new Integer(11));
        model.setValue("Tokyo", "Summer", new Integer(20));
        model.setValue("Tokyo", "Fall", new Integer(16));
        model.setValue("Tokyo", "Winter", new Integer(-2));
        model.setValue("New York", "Spring", new Integer(6));
        model.setValue("New York", "Summer", new Integer(12));
        model.setValue("New York", "Fall", new Integer(10));
        model.setValue("New York", "Winter", new Integer(2));

        // Set model to the chart
        chart.setModel(model);
    }
}

After that, you can easily obtain an amazing chart to visualize your data.

Change Configuration

Moreover, if you want to change the configuration, you can add additional declarations in the composer:

    // Get the legend option in chart
    Legend legend = chart.getLegend();

    // Chage lengend's layout to vertical
    legend.setLayout("vertical");

    // Change lengend's alignment
    legend.setAlign("right");
    legend.setVerticalAlign("middle");

    // Remove lenged's border
    legend.setBorderWidth(0);

The Legend of chart will be moved to the right of the chart without border.

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