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- /*
- @ITMillApache2LicenseForJavaFiles@
- */
- package com.vaadin.terminal.gwt.client.ui;
-
- import java.util.ArrayList;
- import java.util.Iterator;
- import java.util.List;
- import java.util.Stack;
-
- import com.google.gwt.dom.client.NodeList;
- import com.google.gwt.event.logical.shared.CloseEvent;
- import com.google.gwt.event.logical.shared.CloseHandler;
- import com.google.gwt.event.logical.shared.ValueChangeEvent;
- import com.google.gwt.event.logical.shared.ValueChangeHandler;
- import com.google.gwt.user.client.Command;
- import com.google.gwt.user.client.DOM;
- import com.google.gwt.user.client.DeferredCommand;
- import com.google.gwt.user.client.Element;
- import com.google.gwt.user.client.Event;
- import com.google.gwt.user.client.History;
- import com.google.gwt.user.client.Timer;
- import com.google.gwt.user.client.ui.HasHTML;
- import com.google.gwt.user.client.ui.PopupPanel;
- import com.google.gwt.user.client.ui.RootPanel;
- import com.google.gwt.user.client.ui.UIObject;
- import com.google.gwt.user.client.ui.Widget;
- import com.vaadin.terminal.gwt.client.ApplicationConnection;
- import com.vaadin.terminal.gwt.client.BrowserInfo;
- import com.vaadin.terminal.gwt.client.ContainerResizedListener;
- import com.vaadin.terminal.gwt.client.Paintable;
- import com.vaadin.terminal.gwt.client.UIDL;
- import com.vaadin.terminal.gwt.client.Util;
-
- public class VMenuBar extends Widget implements Paintable,
- CloseHandler<PopupPanel>, ContainerResizedListener,
- ValueChangeHandler<String> {
-
- /** Set the CSS class name to allow styling. */
- public static final String CLASSNAME = "v-menubar";
-
- /** For server connections **/
- protected String uidlId;
- protected ApplicationConnection client;
-
- protected final VMenuBar hostReference = this;
- protected String submenuIcon = null;
- protected CustomMenuItem moreItem = null;
- protected VMenuBar collapsedRootItems;
-
- // Construct an empty command to be used when the item has no command
- // associated
- protected static final Command emptyCommand = null;
-
- /** Widget fields **/
- protected boolean subMenu;
- protected ArrayList<CustomMenuItem> items;
- protected Element containerElement;
- protected VOverlay popup;
- protected VMenuBar visibleChildMenu;
- protected boolean menuVisible = false;
- protected VMenuBar parentMenu;
- protected CustomMenuItem selected;
-
- private Timer layoutTimer;
-
- private boolean enabled = true;
-
- public VMenuBar() {
- // Create an empty horizontal menubar
- this(false);
- }
-
- public VMenuBar(boolean subMenu) {
- super();
- setElement(DOM.createDiv());
-
- items = new ArrayList<CustomMenuItem>();
- popup = null;
- visibleChildMenu = null;
-
- containerElement = getElement();
-
- if (!subMenu) {
- setStylePrimaryName(CLASSNAME);
- // Monitor back&forward buttons
- History.addValueChangeHandler(this);
- } else {
- setStylePrimaryName(CLASSNAME + "-submenu");
- }
- this.subMenu = subMenu;
-
- sinkEvents(Event.ONCLICK | Event.ONMOUSEOVER | Event.ONMOUSEOUT
- | Event.ONLOAD);
- }
-
- @Override
- public void setWidth(String width) {
- Util.setWidthExcludingPaddingAndBorder(this, width, 0);
- if (!subMenu) {
- // Only needed for root level menu
- hideChildren();
- setSelected(null);
- menuVisible = false;
- }
- }
-
- /**
- * This method must be implemented to update the client-side component from
- * UIDL data received from server.
- *
- * This method is called when the page is loaded for the first time, and
- * every time UI changes in the component are received from the server.
- */
- public void updateFromUIDL(UIDL uidl, ApplicationConnection client) {
- // This call should be made first. Ensure correct implementation,
- // and let the containing layout manage caption, etc.
- if (client.updateComponent(this, uidl, true)) {
- return;
- }
- this.enabled = !uidl.getBooleanAttribute("disabled");
-
- // For future connections
- this.client = client;
- uidlId = uidl.getId();
-
- // Empty the menu every time it receives new information
- if (!getItems().isEmpty()) {
- clearItems();
- }
-
- UIDL options = uidl.getChildUIDL(0);
-
- // FIXME remove in version 7
- if (options.hasAttribute("submenuIcon")) {
- submenuIcon = client.translateVaadinUri(uidl.getChildUIDL(0)
- .getStringAttribute("submenuIcon"));
- } else {
- submenuIcon = null;
- }
-
- if (uidl.hasAttribute("width")) {
- UIDL moreItemUIDL = options.getChildUIDL(0);
- StringBuffer itemHTML = new StringBuffer();
-
- if (moreItemUIDL.hasAttribute("icon")) {
- itemHTML.append("<img src=\""
- + client.translateVaadinUri(moreItemUIDL
- .getStringAttribute("icon")) + "\" class=\""
- + Icon.CLASSNAME + "\" alt=\"\" />");
- }
-
- String moreItemText = moreItemUIDL.getStringAttribute("text");
- if ("".equals(moreItemText)) {
- moreItemText = "►";
- }
- itemHTML.append(moreItemText);
-
- moreItem = new CustomMenuItem(itemHTML.toString(), emptyCommand);
- collapsedRootItems = new VMenuBar(true);
- moreItem.setSubMenu(collapsedRootItems);
- moreItem.addStyleName(CLASSNAME + "-more-menuitem");
- }
-
- UIDL uidlItems = uidl.getChildUIDL(1);
- Iterator<Object> itr = uidlItems.getChildIterator();
- Stack<Iterator<Object>> iteratorStack = new Stack<Iterator<Object>>();
- Stack<VMenuBar> menuStack = new Stack<VMenuBar>();
- VMenuBar currentMenu = this;
-
- while (itr.hasNext()) {
- UIDL item = (UIDL) itr.next();
- CustomMenuItem currentItem = null;
-
- String itemText = item.getStringAttribute("text");
- final int itemId = item.getIntAttribute("id");
-
- boolean itemHasCommand = item.hasAttribute("command");
-
- // Construct html from the text and the optional icon
- StringBuffer itemHTML = new StringBuffer();
- Command cmd = null;
-
- if (item.hasAttribute("separator")) {
- itemHTML.append("<span>---</span>");
- } else {
- // Add submenu indicator
- if (item.getChildCount() > 0) {
- // FIXME For compatibility reasons: remove in version 7
- String bgStyle = "";
- if (submenuIcon != null) {
- bgStyle = " style=\"background-image: url("
- + submenuIcon
- + "); text-indent: -999px; width: 1em;\"";
- }
- itemHTML.append("<span class=\"" + CLASSNAME
- + "-submenu-indicator\"" + bgStyle
- + ">►</span>");
- }
-
- itemHTML.append("<span class=\"" + CLASSNAME
- + "-menuitem-caption\">");
- if (item.hasAttribute("icon")) {
- itemHTML
- .append("<img src=\""
- + client.translateVaadinUri(item
- .getStringAttribute("icon"))
- + "\" class=\"" + Icon.CLASSNAME
- + "\" alt=\"\" />");
- }
- itemHTML.append(Util.escapeHTML(itemText) + "</span>");
-
- if (itemHasCommand) {
- // Construct a command that fires onMenuClick(int) with the
- // item's id-number
- cmd = new Command() {
- public void execute() {
- hostReference.onMenuClick(itemId);
- }
- };
- }
- }
-
- currentItem = currentMenu.addItem(itemHTML.toString(), cmd);
- currentItem.setSeparator(item.hasAttribute("separator"));
- currentItem.setEnabled(!item.hasAttribute("disabled"));
- if (item.hasAttribute("style")) {
- String itemStyle = item.getStringAttribute("style");
- currentItem.addStyleDependentName(itemStyle);
- }
-
- if (item.getChildCount() > 0) {
- menuStack.push(currentMenu);
- iteratorStack.push(itr);
- itr = item.getChildIterator();
- currentMenu = new VMenuBar(true);
- if (uidl.hasAttribute("style")) {
- for (String style : uidl.getStringAttribute("style").split(
- " ")) {
- currentMenu.addStyleDependentName(style);
- }
- }
- currentItem.setSubMenu(currentMenu);
- }
-
- while (!itr.hasNext() && !iteratorStack.empty()) {
- itr = iteratorStack.pop();
- currentMenu = menuStack.pop();
- }
- }// while
-
- iLayout();
-
- }// updateFromUIDL
-
- /**
- * This is called by the items in the menu and it communicates the
- * information to the server
- *
- * @param clickedItemId
- * id of the item that was clicked
- */
- public void onMenuClick(int clickedItemId) {
- // Updating the state to the server can not be done before
- // the server connection is known, i.e., before updateFromUIDL()
- // has been called.
- if (uidlId != null && client != null) {
- // Communicate the user interaction parameters to server. This call
- // will initiate an AJAX request to the server.
- client.updateVariable(uidlId, "clickedId", clickedItemId, true);
- }
- }
-
- /** Widget methods **/
-
- /**
- * Returns a list of items in this menu
- */
- public List<CustomMenuItem> getItems() {
- return items;
- }
-
- /**
- * Remove all the items in this menu
- */
- public void clearItems() {
- Element e = getContainerElement();
- while (DOM.getChildCount(e) > 0) {
- DOM.removeChild(e, DOM.getChild(e, 0));
- }
- items.clear();
- }
-
- /**
- * Returns the containing element of the menu
- *
- * @return
- */
- public Element getContainerElement() {
- return containerElement;
- }
-
- /**
- * Add a new item to this menu
- *
- * @param html
- * items text
- * @param cmd
- * items command
- * @return the item created
- */
- public CustomMenuItem addItem(String html, Command cmd) {
- CustomMenuItem item = new CustomMenuItem(html, cmd);
- addItem(item);
- return item;
- }
-
- /**
- * Add a new item to this menu
- *
- * @param item
- */
- public void addItem(CustomMenuItem item) {
- if (items.contains(item)) {
- return;
- }
- DOM.appendChild(getContainerElement(), item.getElement());
- item.setParentMenu(this);
- item.setSelected(false);
- items.add(item);
- }
-
- public void addItem(CustomMenuItem item, int index) {
- if (items.contains(item)) {
- return;
- }
- DOM.insertChild(getContainerElement(), item.getElement(), index);
- item.setParentMenu(this);
- item.setSelected(false);
- items.add(index, item);
- }
-
- /**
- * Remove the given item from this menu
- *
- * @param item
- */
- public void removeItem(CustomMenuItem item) {
- if (items.contains(item)) {
- int index = items.indexOf(item);
-
- DOM.removeChild(getContainerElement(), DOM.getChild(
- getContainerElement(), index));
- items.remove(index);
- }
- }
-
- /*
- * @see
- * com.google.gwt.user.client.ui.Widget#onBrowserEvent(com.google.gwt.user
- * .client.Event)
- */
- @Override
- public void onBrowserEvent(Event e) {
- super.onBrowserEvent(e);
-
- // Handle onload events (icon loaded, size changes)
- if (DOM.eventGetType(e) == Event.ONLOAD) {
- requestLayout();
- return;
- }
-
- Element targetElement = DOM.eventGetTarget(e);
- CustomMenuItem targetItem = null;
- for (int i = 0; i < items.size(); i++) {
- CustomMenuItem item = items.get(i);
- if (DOM.isOrHasChild(item.getElement(), targetElement)) {
- targetItem = item;
- }
- }
-
- if (targetItem != null) {
- switch (DOM.eventGetType(e)) {
-
- case Event.ONCLICK:
- if (isEnabled() && targetItem.isEnabled()) {
- itemClick(targetItem);
- }
- break;
-
- case Event.ONMOUSEOVER:
- if (isEnabled() && targetItem.isEnabled()) {
- itemOver(targetItem);
- }
- break;
-
- case Event.ONMOUSEOUT:
- itemOut(targetItem);
- break;
- }
- }
- }
-
- private boolean isEnabled() {
- return enabled;
- }
-
- private void requestLayout() {
- if (layoutTimer == null) {
- layoutTimer = new Timer() {
- @Override
- public void run() {
- layoutTimer = null;
- iLayout();
- }
- };
- }
- layoutTimer.schedule(100);
- }
-
- /**
- * When an item is clicked
- *
- * @param item
- */
- public void itemClick(CustomMenuItem item) {
- if (item.getCommand() != null) {
- setSelected(null);
-
- if (visibleChildMenu != null) {
- visibleChildMenu.hideChildren();
- }
-
- hideParents(true);
- menuVisible = false;
- DeferredCommand.addCommand(item.getCommand());
-
- } else {
- if (item.getSubMenu() != null
- && item.getSubMenu() != visibleChildMenu) {
- setSelected(item);
- showChildMenu(item);
- menuVisible = true;
- } else if (!subMenu) {
- setSelected(null);
- hideChildren();
- menuVisible = false;
- }
- }
- }
-
- /**
- * When the user hovers the mouse over the item
- *
- * @param item
- */
- public void itemOver(CustomMenuItem item) {
- if ((subMenu || menuVisible) && !item.isSeparator()) {
- setSelected(item);
- }
-
- if (menuVisible && visibleChildMenu != item.getSubMenu()
- && popup != null) {
- popup.hide();
- }
-
- if (menuVisible && item.getSubMenu() != null
- && visibleChildMenu != item.getSubMenu()) {
- showChildMenu(item);
- }
- }
-
- /**
- * When the mouse is moved away from an item
- *
- * @param item
- */
- public void itemOut(CustomMenuItem item) {
- if (visibleChildMenu != item.getSubMenu()) {
- hideChildMenu(item);
- setSelected(null);
- } else if (visibleChildMenu == null) {
- setSelected(null);
- }
- }
-
- /**
- * Shows the child menu of an item. The caller must ensure that the item has
- * a submenu.
- *
- * @param item
- */
- public void showChildMenu(CustomMenuItem item) {
- final int shadowSpace = 10;
-
- popup = new VOverlay(true, false, true);
- popup.setStylePrimaryName(CLASSNAME + "-popup");
- popup.setWidget(item.getSubMenu());
- popup.addCloseHandler(this);
- popup.addAutoHidePartner(item.getElement());
-
- int left = 0;
- int top = 0;
- if (subMenu) {
- left = item.getParentMenu().getAbsoluteLeft()
- + item.getParentMenu().getOffsetWidth();
- top = item.getAbsoluteTop();
- } else {
- left = item.getAbsoluteLeft();
- top = item.getParentMenu().getAbsoluteTop()
- + item.getParentMenu().getOffsetHeight();
- }
- popup.setPopupPosition(left, top);
-
- item.getSubMenu().onShow();
- visibleChildMenu = item.getSubMenu();
- item.getSubMenu().setParentMenu(this);
-
- popup.show();
-
- if (left + popup.getOffsetWidth() >= RootPanel.getBodyElement()
- .getOffsetWidth()
- - shadowSpace) {
- if (subMenu) {
- left = item.getParentMenu().getAbsoluteLeft()
- - popup.getOffsetWidth() - shadowSpace;
- } else {
- left = RootPanel.getBodyElement().getOffsetWidth()
- - popup.getOffsetWidth() - shadowSpace;
- }
- // Accommodate space for shadow
- if (left < shadowSpace) {
- left = shadowSpace;
- }
- popup.setPopupPosition(left, top);
- }
-
- // IE7 really tests one's patience sometimes
- // Part of a fix to correct #3850
- if (BrowserInfo.get().isIE7()) {
- popup.getElement().getStyle().setProperty("zoom", "");
- DeferredCommand.addCommand(new Command() {
- public void execute() {
- if (popup.getElement().getStyle().getProperty("width") == null
- || popup.getElement().getStyle().getProperty(
- "width") == "") {
- popup.setWidth(popup.getOffsetWidth() + "px");
- }
- popup.getElement().getStyle().setProperty("zoom", "1");
- }
- });
- }
- }
-
- /**
- * Hides the submenu of an item
- *
- * @param item
- */
- public void hideChildMenu(CustomMenuItem item) {
- if (visibleChildMenu != null
- && !(visibleChildMenu == item.getSubMenu())) {
- popup.hide();
- }
- }
-
- /**
- * When the menu is shown.
- */
- public void onShow() {
- // remove possible previous selection
- if (selected != null) {
- selected.setSelected(false);
- selected = null;
- }
- menuVisible = true;
- }
-
- /**
- * Listener method, fired when this menu is closed
- */
- public void onClose(CloseEvent<PopupPanel> event) {
- hideChildren();
- if (event.isAutoClosed()) {
- hideParents(true);
- menuVisible = false;
- }
- visibleChildMenu = null;
- popup = null;
- }
-
- /**
- * Recursively hide all child menus
- */
- public void hideChildren() {
- if (visibleChildMenu != null) {
- visibleChildMenu.hideChildren();
- popup.hide();
- }
- }
-
- /**
- * Recursively hide all parent menus
- */
- public void hideParents(boolean autoClosed) {
- if (visibleChildMenu != null) {
- popup.hide();
- setSelected(null);
- menuVisible = !autoClosed;
- }
-
- if (getParentMenu() != null) {
- getParentMenu().hideParents(autoClosed);
- }
- }
-
- /**
- * Returns the parent menu of this menu, or null if this is the top-level
- * menu
- *
- * @return
- */
- public VMenuBar getParentMenu() {
- return parentMenu;
- }
-
- /**
- * Set the parent menu of this menu
- *
- * @param parent
- */
- public void setParentMenu(VMenuBar parent) {
- parentMenu = parent;
- }
-
- /**
- * Returns the currently selected item of this menu, or null if nothing is
- * selected
- *
- * @return
- */
- public CustomMenuItem getSelected() {
- return selected;
- }
-
- /**
- * Set the currently selected item of this menu
- *
- * @param item
- */
- public void setSelected(CustomMenuItem item) {
- // If we had something selected, unselect
- if (item != selected && selected != null) {
- selected.setSelected(false);
- }
- // If we have a valid selection, select it
- if (item != null) {
- item.setSelected(true);
- }
-
- selected = item;
- }
-
- /**
- *
- * A class to hold information on menu items
- *
- */
- private class CustomMenuItem extends UIObject implements HasHTML {
-
- protected String html = null;
- protected Command command = null;
- protected VMenuBar subMenu = null;
- protected VMenuBar parentMenu = null;
- protected boolean enabled = true;
- protected boolean isSeparator = false;
-
- public CustomMenuItem(String html, Command cmd) {
- // We need spans to allow inline-block in IE
- setElement(DOM.createSpan());
-
- setHTML(html);
- setCommand(cmd);
- setSelected(false);
-
- setStylePrimaryName(CLASSNAME + "-menuitem");
-
- }
-
- public void setSelected(boolean selected) {
- if (selected && !isSeparator) {
- addStyleDependentName("selected");
- } else {
- removeStyleDependentName("selected");
- }
- }
-
- /*
- * setters and getters for the fields
- */
-
- public void setSubMenu(VMenuBar subMenu) {
- this.subMenu = subMenu;
- }
-
- public VMenuBar getSubMenu() {
- return subMenu;
- }
-
- public void setParentMenu(VMenuBar parentMenu) {
- this.parentMenu = parentMenu;
- }
-
- public VMenuBar getParentMenu() {
- return parentMenu;
- }
-
- public void setCommand(Command command) {
- this.command = command;
- }
-
- public Command getCommand() {
- return command;
- }
-
- public String getHTML() {
- return html;
- }
-
- public void setHTML(String html) {
- this.html = html;
- DOM.setInnerHTML(getElement(), html);
- if (BrowserInfo.get().isIE6() && client != null) {
- // Find possible icon element
- final NodeList imgs = getElement().getElementsByTagName("IMG");
- if (imgs.getLength() > 0) {
- client.addPngFix((Element) imgs.getItem(0).cast());
- }
- }
- }
-
- public String getText() {
- return html;
- }
-
- public void setText(String text) {
- setHTML(Util.escapeHTML(text));
- }
-
- public void setEnabled(boolean enabled) {
- this.enabled = enabled;
- if (enabled) {
- removeStyleDependentName("disabled");
- } else {
- addStyleDependentName("disabled");
- }
- }
-
- public boolean isEnabled() {
- return enabled;
- }
-
- private void setSeparator(boolean separator) {
- isSeparator = separator;
- if (separator) {
- setStyleName(CLASSNAME + "-separator");
- } else {
- setStyleName(CLASSNAME + "-menuitem");
- setEnabled(enabled);
- }
- }
-
- public boolean isSeparator() {
- return isSeparator;
- }
- }
-
- /**
- * @author Jouni Koivuviita / IT Mill Ltd.
- */
- private int paddingWidth = -1;
-
- public void iLayout() {
- // Only collapse if there is more than one item in the root menu and the
- // menu has an explicit size
- if ((getItems().size() > 1 || (collapsedRootItems != null && collapsedRootItems
- .getItems().size() > 0))
- && getElement().getStyle().getProperty("width") != null
- && moreItem != null) {
-
- // Measure the width of the "more" item
- final boolean morePresent = getItems().contains(moreItem);
- addItem(moreItem);
- final int moreItemWidth = moreItem.getOffsetWidth();
- if (!morePresent) {
- removeItem(moreItem);
- }
-
- // Measure available space
- if (paddingWidth == -1) {
- int widthBefore = getElement().getClientWidth();
- getElement().getStyle().setProperty("padding", "0");
- paddingWidth = widthBefore - getElement().getClientWidth();
- getElement().getStyle().setProperty("padding", "");
- }
- String overflow = "";
- if (BrowserInfo.get().isIE6()) {
- // IE6 cannot measure available width correctly without
- // overflow:hidden
- overflow = getElement().getStyle().getProperty("overflow");
- getElement().getStyle().setProperty("overflow", "hidden");
- }
-
- int availableWidth = getElement().getClientWidth() - paddingWidth;
-
- if (BrowserInfo.get().isIE6()) {
- // IE6 cannot measure available width correctly without
- // overflow:hidden
- getElement().getStyle().setProperty("overflow", overflow);
- }
- int diff = availableWidth - getConsumedWidth();
-
- removeItem(moreItem);
-
- if (diff < 0) {
- // Too many items: collapse last items from root menu
- final int widthNeeded = moreItemWidth - diff;
- int widthReduced = 0;
-
- while (widthReduced < widthNeeded && getItems().size() > 0) {
- // Move last root menu item to collapsed menu
- CustomMenuItem collapse = getItems().get(
- getItems().size() - 1);
- widthReduced += collapse.getOffsetWidth();
- removeItem(collapse);
- collapsedRootItems.addItem(collapse, 0);
- }
- } else if (collapsedRootItems.getItems().size() > 0) {
- // Space available for items: expand first items from collapsed
- // menu
- int widthAvailable = diff + moreItemWidth;
- int widthGrowth = 0;
-
- while (widthAvailable > widthGrowth) {
- // Move first item from collapsed menu to the root menu
- CustomMenuItem expand = collapsedRootItems.getItems()
- .get(0);
- collapsedRootItems.removeItem(expand);
- addItem(expand);
- widthGrowth += expand.getOffsetWidth();
- if (collapsedRootItems.getItems().size() > 0) {
- widthAvailable -= moreItemWidth;
- }
- if (widthGrowth > widthAvailable) {
- removeItem(expand);
- collapsedRootItems.addItem(expand, 0);
- } else {
- widthAvailable = diff;
- }
- }
- }
- if (collapsedRootItems.getItems().size() > 0) {
- addItem(moreItem);
- }
- }
- }
-
- private int getConsumedWidth() {
- int w = 0;
- for (CustomMenuItem item : getItems()) {
- if (!collapsedRootItems.getItems().contains(item)) {
- w += item.getOffsetWidth();
- }
- }
- return w;
- }
-
- public void onValueChange(ValueChangeEvent<String> arg0) {
- // Close menu if user uses back & forward buttons #4109
- if (!subMenu) {
- setSelected(null);
- hideChildren();
- menuVisible = false;
- }
- }
- }
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