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package com.github.bordertech.wcomponents.examples.menu;
import com.github.bordertech.wcomponents.Action;
import com.github.bordertech.wcomponents.ActionEvent;
import com.github.bordertech.wcomponents.MenuSelectContainer.SelectionMode;
import com.github.bordertech.wcomponents.Size;
import com.github.bordertech.wcomponents.WComponent;
import com.github.bordertech.wcomponents.WDecoratedLabel;
import com.github.bordertech.wcomponents.WImage;
import com.github.bordertech.wcomponents.WMenu;
import com.github.bordertech.wcomponents.WMenuItem;
import com.github.bordertech.wcomponents.WMenuItemGroup;
import com.github.bordertech.wcomponents.WPanel;
import com.github.bordertech.wcomponents.WStyledText;
import com.github.bordertech.wcomponents.WSubMenu;
import com.github.bordertech.wcomponents.WText;
import com.github.bordertech.wcomponents.layout.FlowLayout;
import com.github.bordertech.wcomponents.layout.FlowLayout.Alignment;
import com.github.bordertech.wcomponents.util.HtmlClassProperties;
import com.github.bordertech.wcomponents.util.TreeNode;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
/**
* This component demonstrates the usage of a {@link WMenu.MenuType#TREE Tree} {@link WMenu}.
*
* @author Yiannis Paschalidis
* @since 1.0.0
*/
public class TreeMenuExample extends WPanel {
/**
* Creates a TreeMenuExample.
*/
public TreeMenuExample() {
setLayout(new FlowLayout(Alignment.VERTICAL, Size.XL));
add(new WText("Example java object hierarchy"));
WPanel content = new WPanel(WPanel.Type.BLOCK);
WText selectedMenuText = new WText();
content.add(new WStyledText("Selected item: ", WStyledText.Type.EMPHASISED));
content.add(selectedMenuText);
add(content);
add(buildTreeMenu(selectedMenuText));
//simple tree menu showing WDecoratedLabel
add(buildTreeMenuWithDecoratedLabel());
}
/**
* Builds up a tree menu for inclusion in the example.
*
* @param selectedMenuText the WText to display the selected menu item.
* @return a tree menu for the example.
*/
private WMenu buildTreeMenu(final WText selectedMenuText) {
WMenu menu = new WMenu(WMenu.MenuType.TREE);
menu.setSelectionMode(SelectionMode.SINGLE);
mapTreeHierarchy(menu, createExampleHierarchy(), selectedMenuText);
return menu;
}
/**
* Recursively maps a tree hierarchy to a hierarchical menu.
*
* @param currentComponent the current component in the menu.
* @param currentNode the current node in the tree.
* @param selectedMenuText the WText to display the selected menu item.
*/
private void mapTreeHierarchy(final WComponent currentComponent,
final StringTreeNode currentNode, final WText selectedMenuText) {
if (currentNode.isLeaf()) {
WMenuItem menuItem = new WMenuItem(currentNode.getData(), new ExampleMenuAction(
selectedMenuText));
menuItem.setActionObject(currentNode.getData());
if (currentComponent instanceof WMenu) {
((WMenu) currentComponent).add(menuItem);
} else {
((WSubMenu) currentComponent).add(menuItem);
}
} else {
WSubMenu subMenu = new WSubMenu(currentNode.getData());
subMenu.setSelectionMode(SelectionMode.SINGLE);
if (currentComponent instanceof WMenu) {
((WMenu) currentComponent).add(subMenu);
} else {
((WSubMenu) currentComponent).add(subMenu);
}
// Expand the first couple of levels in the tree by default.
if (currentNode.getLevel() < 2) {
subMenu.setOpen(true);
}
for (Iterator i = currentNode.children(); i.hasNext();) {
mapTreeHierarchy(subMenu, (StringTreeNode) i.next(), selectedMenuText);
}
}
}
/**
* Creates an example hierarchy, showing the WMenu API.
*
* @return the root of the tree.
*/
private static StringTreeNode createExampleHierarchy() {
StringTreeNode root = new StringTreeNode(Object.class.getName());
Map nodeMap = new HashMap<>();
nodeMap.put(root.getData(), root);
// The classes to show in the hierarchy
Class[] classes = new Class[]{
WMenu.class,
WMenuItem.class,
WSubMenu.class,
WMenuItemGroup.class,
WText.class,
WText.class
};
for (Class clazz : classes) {
StringTreeNode childNode = new StringTreeNode(clazz.getName());
nodeMap.put(childNode.getData(), childNode);
for (Class parentClass = clazz.getSuperclass(); parentClass != null; parentClass = parentClass.
getSuperclass()) {
StringTreeNode parentNode = nodeMap.get(parentClass.getName());
if (parentNode == null) {
parentNode = new StringTreeNode(parentClass.getName());
nodeMap.put(parentNode.getData(), parentNode);
parentNode.add(childNode);
childNode = parentNode;
} else {
parentNode.add(childNode); // already have this node hierarchy
break;
}
}
}
return root;
}
/**
* Tree menu containing image in the items. This example demonstrates creating {@link WSubMenu} and
* {@link WMenuItem} components with {@link WDecoratedLabel}.
*
* @return menu with a decorated label
*/
private WMenu buildTreeMenuWithDecoratedLabel() {
WMenu menu = new WMenu(WMenu.MenuType.TREE);
WDecoratedLabel dLabel = new WDecoratedLabel(null, new WText("Settings Menu"), new WImage(
"/image/settings.png", "settings"));
WSubMenu settings = new WSubMenu(dLabel);
settings.setMode(WSubMenu.MenuMode.LAZY);
settings.setAccessKey('S');
menu.add(settings);
settings.add(new WMenuItem(new WDecoratedLabel(null, new WText("Account Settings"),
new WImage("/image/user-properties.png", "user properties"))));
settings.add(new WMenuItem(new WDecoratedLabel(null, new WText("Personal Details"),
new WImage("/image/user.png", "user"))));
WSubMenu addressSub = new WSubMenu(new WDecoratedLabel(null, new WText("Address Details"),
new WImage("/image/address-book-open.png", "address book")));
addressSub.setMode(WSubMenu.MenuMode.LAZY);
settings.add(addressSub);
addressSub.add(new WMenuItem(new WDecoratedLabel(null, new WText("Home Address"),
new WImage("/image/home.png", "home"))));
addressSub.add(new WMenuItem(new WDecoratedLabel(null, new WText("Work Address"),
new WImage("/image/wrench.png", "work"))));
addressSub.add(new WMenuItem(new WDecoratedLabel(null, new WText("Postal Address"),
new WImage("/image/mail-post.png", "postal"))));
WMenuItem itemWithIcon = new WMenuItem("Help");
itemWithIcon.setAction(new Action() {
@Override
public void execute(final ActionEvent event) {
// do something
}
});
itemWithIcon.setHtmlClass(HtmlClassProperties.ICON_HELP_BEFORE);
menu.add(itemWithIcon);
return menu;
}
}
