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index.zulzul<zk>
<div apply="pkg$.ExportComposer">
<charts id="mychart"></charts>
</div>
</zk>ExportComposer.javajavaimport java.util.ArrayList;
import java.util.List;
import java.util.Map;
import org.zkoss.chart.Charts;
import org.zkoss.chart.Exporting;
import org.zkoss.chart.ExportingButton;
import org.zkoss.chart.MenuItem;
import org.zkoss.chart.model.DefaultSingleValueCategoryModel;
import org.zkoss.chart.model.SingleValueCategoryModel;
import org.zkoss.chart.util.AnyVal;
import org.zkoss.json.JavaScriptValue;
import org.zkoss.zk.ui.Component;
import org.zkoss.zk.ui.event.Event;
import org.zkoss.zk.ui.select.SelectorComposer;
import org.zkoss.zk.ui.select.annotation.Listen;
import org.zkoss.zk.ui.select.annotation.Wire;
import org.zkoss.zk.ui.util.Clients;
public class ExportComposer extends SelectorComposer<Component> {
@Wire
private Charts mychart;
private static final String ON_MY_CUSTOM_ITEM = "onMyCustomItem";
private static final String ON_MY_CUSTOM_TOGGLE = "onMyCustomToggle";
private boolean item1State;
private SingleValueCategoryModel model = new DefaultSingleValueCategoryModel();
@Override
public void doAfterCompose(Component comp) throws Exception {
super.doAfterCompose(comp);
//omitted code to build the content of the chart...
createCustomExportItems();
}
private void createCustomExportItems() {
Exporting exporting = mychart.getExporting();
ExportingButton buttons = exporting.getButtons();
List<MenuItem> menuItems = new ArrayList<>();
//add "toggle" pattern menuitem
menuItems.add(customToggleMenuItem(item1State, "Toggle this", fireServerEventScript(ON_MY_CUSTOM_TOGGLE, "item1")));
menuItems.add(separator());
//optional rebuild the default menu items, otherwise they are replaced
menuItems.add(defaultMenuItem("printChart", "this.print();"));
menuItems.add(separator());
menuItems.add(defaultMenuItem("downloadPNG", "this.exportChart();"));
//removing default items (not replacing them back to the popup)
//menuItems.add(defaultMenuItem("downloadJPEG", "this.exportChart({type: \"image/jpeg\"});"));
//menuItems.add(defaultMenuItem("downloadPDF", "this.exportChart({type: \"application/pdf\"});"));
//menuItems.add(defaultMenuItem("downloadSVG", "this.exportChart({type: \"image/svg+xml\"});"));
menuItems.add(separator());
//add custom menu items (possible at any position in the list)
menuItems.add(customMenuItem("My Custom Item (at Client)", "alert('custom menu item clicked, handled in browser')"));
menuItems.add(customMenuItem("My Custom Item (to Server)", fireServerEventScript(ON_MY_CUSTOM_ITEM, "")));
buttons.setMenuItems(menuItems);
}
private String fireServerEventScript(String eventName, String payload) {
return "var chartsWidget = zk(evt.target).$(); " +
"chartsWidget.fire('" + eventName + "', {payload: '"+ payload +"'}, {toServer: true});";
}
@Listen(ON_MY_CUSTOM_ITEM + " = #mychart")
public void handleMyCustomItem() {
Clients.showNotification("custem menu item clicked, handled on server");
}
@Listen(ON_MY_CUSTOM_TOGGLE + " = #mychart")
public void handleMyCustomToggle(Event event) {
String payload = ((Map<String, String>) event.getData()).get("payload");
switch (payload) {
case "item1":
item1State = !item1State;
createCustomExportItems();
mychart.invalidate();
break;
default:
break;
}
Clients.showNotification("custem menu item clicked, handled on server");
}
private MenuItem customToggleMenuItem(Boolean state, String text, String onclickJS) {
MenuItem menuItem = new MenuItem();
String iconString = state?"<i class=\"z-icon z-icon-check-square\"></i> ":"<i class=\"z-icon z-icon-square\"></i> ";
menuItem.setText(iconString+text);
menuItem.setOnclick(new JavaScriptValue("function(evt) {" + onclickJS + "}"));
return menuItem;
}
private MenuItem customMenuItem(String text, String onclickJS) {
MenuItem menuItem = new MenuItem();
menuItem.setText(text);
menuItem.setOnclick(new JavaScriptValue("function(evt) {" + onclickJS + "}"));
return menuItem;
}
private MenuItem defaultMenuItem(String textKey, String onclickJS) {
MenuItem menuItem = new MenuItem();
menuItem.addExtraAttr("textKey", new AnyVal<String>(textKey));
menuItem.setOnclick(new JavaScriptValue("function(evt) {" + onclickJS + "}"));
return menuItem;
}
private MenuItem separator() {
MenuItem menuItem = new MenuItem();
menuItem.addExtraAttr("separator", new AnyVal<Boolean>(true));
return menuItem;
}
}