Timeline.java

package org.zkoss.google.charts;

import java.util.HashMap;
import java.util.Map;

/**
 * <p>
 * Wrapper of the <a href= "https://developers.google.com/chart/interactive/docs/gallery/timeline">Timeline</a>
 * visualization provided in Google Charts.
 * </p>
 *
 * @author Sean Connolly
 */
public class Timeline extends GoogleChart {

	private static final String AVOID_OVERLAPPING_GRID_LINES = "avoidOverlappingGridLines";
	private static final String COLORS = "colors";
	private static final String ENABLE_INTERACTIVITY = "enableInteractivity";
	private static final String TIMELINE = "timeline";
	private static final String ROW_LABEL_STYLE = "rowLabelStyle";
	private static final String BAR_LABEL_STYLE = "barLabelStyle";
	private static final String COLOR_BY_ROW_LABEL = "colorByRowLabel";
	private static final String GROUP_BY_ROW_LABEL = "groupByRowLabel";
	private static final String SHOW_BAR_LABELS = "showBarLabels";
	private static final String SHOW_ROW_LABELS = "showRowLabels";
	private static final String SINGLE_COLOR = "singleColor";

	public String[] getColors() {
		return getOption(COLORS, new String[0], String[].class);
	}

	public void setColors(String... colors) {
		setOption(COLORS, colors);
	}

	public void setEnableInteractivity(boolean interactive) {
		setOption(ENABLE_INTERACTIVITY, interactive);
	}

	public void setAvoidOverlappingGridLines(boolean avoid) {
		setOption(AVOID_OVERLAPPING_GRID_LINES, avoid);
	}

	public void setRowLabelStyle(Map<String, String> css) {
		setTimelineOption(ROW_LABEL_STYLE, css);
	}

	public void setBarLabelStyle(Map<String, String> css) {
		setTimelineOption(BAR_LABEL_STYLE, css);
	}

	public void setColorByRowLabel(boolean color) {
		setTimelineOption(COLOR_BY_ROW_LABEL, color);
	}

	public void setGroupByRowLabel(boolean group) {
		setTimelineOption(GROUP_BY_ROW_LABEL, group);
	}

	public void setShowBarLabels(boolean show) {
		setTimelineOption(SHOW_BAR_LABELS, show);
	}

	public void setShowRowLabels(boolean show) {
		setTimelineOption(SHOW_ROW_LABELS, show);
	}

	public void setSingleColor(String color) {
		setTimelineOption(SINGLE_COLOR, color);
	}

	private Map<String, Object> getTimeline() {
		@SuppressWarnings("unchecked")
		Class<Map<String, Object>> clazz = (Class<Map<String, Object>>)(Class<?>)Map.class;
		return getOption(TIMELINE, new HashMap<String, Object>(), clazz);
	}

	private void setTimeline(Map<String, Object> timeline) {
		setOption(TIMELINE, timeline);
	}

	private void setTimelineOption(String name, Object value) {
		Map<String, Object> timeline = getTimeline();
		timeline.put(name, value);
		setTimeline(timeline);
	}
}