Create your first ZK Charts

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In the 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. Assign type and title properties to it.

chart.zul

    <window apply="ChartComposer">
        <charts id="chart" type="line" title="Season Average Temperature" />
    </window>

Then specify chart data with model in the composer:

ChartComposer.java

public class ChartComposer extends SelectorComposer<Window> {

    @Wire
    Charts chart;

    public void doAfterCompose(Window comp) throws Exception {
        super.doAfterCompose(comp);

        // Create a simple category model
        CategoryModel model = new SimpleCategoryModel();

        // Add 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 obtain an amazing chart to visualize your data.

Chart Configuration

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

    Legend legend = chart.getLegend();

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

    // Move lengend's to the middle of right hand side
    legend.setAlign("right");
    legend.setVerticalAlign("middle");

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

The legend of chart will be moved to middle of the right hand side without border.

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