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- /*
- @VaadinApache2LicenseForJavaFiles@
- */
-
- package com.vaadin.terminal.gwt.client.ui;
-
- import java.util.ArrayList;
- import java.util.HashMap;
- import java.util.Iterator;
- import java.util.List;
- import java.util.Map;
-
- import com.google.gwt.core.client.Scheduler;
- import com.google.gwt.event.dom.client.BlurEvent;
- import com.google.gwt.event.dom.client.BlurHandler;
- import com.google.gwt.event.dom.client.ClickEvent;
- import com.google.gwt.event.dom.client.FocusEvent;
- import com.google.gwt.event.dom.client.FocusHandler;
- import com.google.gwt.event.dom.client.LoadEvent;
- import com.google.gwt.event.dom.client.LoadHandler;
- import com.google.gwt.event.shared.HandlerRegistration;
- import com.google.gwt.user.client.Command;
- import com.google.gwt.user.client.ui.CheckBox;
- import com.google.gwt.user.client.ui.FocusWidget;
- import com.google.gwt.user.client.ui.Focusable;
- import com.google.gwt.user.client.ui.Panel;
- import com.google.gwt.user.client.ui.RadioButton;
- import com.google.gwt.user.client.ui.Widget;
- import com.vaadin.terminal.gwt.client.ApplicationConnection;
- import com.vaadin.terminal.gwt.client.EventId;
- import com.vaadin.terminal.gwt.client.UIDL;
- import com.vaadin.terminal.gwt.client.Util;
-
- public class VOptionGroup extends VOptionGroupBase implements FocusHandler,
- BlurHandler {
-
- public static final String HTML_CONTENT_ALLOWED = "usehtml";
-
- public static final String CLASSNAME = "v-select-optiongroup";
-
- private final Panel panel;
-
- private final Map<CheckBox, String> optionsToKeys;
-
- private boolean sendFocusEvents = false;
- private boolean sendBlurEvents = false;
- private List<HandlerRegistration> focusHandlers = null;
- private List<HandlerRegistration> blurHandlers = null;
-
- private final LoadHandler iconLoadHandler = new LoadHandler() {
- public void onLoad(LoadEvent event) {
- Util.notifyParentOfSizeChange(VOptionGroup.this, true);
- }
- };
-
- /**
- * used to check whether a blur really was a blur of the complete
- * optiongroup: if a control inside this optiongroup gains focus right after
- * blur of another control inside this optiongroup (meaning: if onFocus
- * fires after onBlur has fired), the blur and focus won't be sent to the
- * server side as only a focus change inside this optiongroup occured
- */
- private boolean blurOccured = false;
-
- private boolean htmlContentAllowed = false;
-
- public VOptionGroup() {
- super(CLASSNAME);
- panel = (Panel) optionsContainer;
- optionsToKeys = new HashMap<CheckBox, String>();
- }
-
- @Override
- public void updateFromUIDL(UIDL uidl, ApplicationConnection client) {
- htmlContentAllowed = uidl.hasAttribute(HTML_CONTENT_ALLOWED);
-
- super.updateFromUIDL(uidl, client);
-
- sendFocusEvents = client.hasEventListeners(this, EventId.FOCUS);
- sendBlurEvents = client.hasEventListeners(this, EventId.BLUR);
-
- if (focusHandlers != null) {
- for (HandlerRegistration reg : focusHandlers) {
- reg.removeHandler();
- }
- focusHandlers.clear();
- focusHandlers = null;
-
- for (HandlerRegistration reg : blurHandlers) {
- reg.removeHandler();
- }
- blurHandlers.clear();
- blurHandlers = null;
- }
-
- if (sendFocusEvents || sendBlurEvents) {
- focusHandlers = new ArrayList<HandlerRegistration>();
- blurHandlers = new ArrayList<HandlerRegistration>();
-
- // add focus and blur handlers to checkboxes / radio buttons
- for (Widget wid : panel) {
- if (wid instanceof CheckBox) {
- focusHandlers.add(((CheckBox) wid).addFocusHandler(this));
- blurHandlers.add(((CheckBox) wid).addBlurHandler(this));
- }
- }
- }
- }
-
- /*
- * Return true if no elements were changed, false otherwise.
- */
- @Override
- protected void buildOptions(UIDL uidl) {
- panel.clear();
- for (final Iterator<?> it = uidl.getChildIterator(); it.hasNext();) {
- final UIDL opUidl = (UIDL) it.next();
- CheckBox op;
-
- String itemHtml = opUidl.getStringAttribute("caption");
- if (!htmlContentAllowed) {
- itemHtml = Util.escapeHTML(itemHtml);
- }
-
- String icon = opUidl.getStringAttribute("icon");
- if (icon != null && icon.length() != 0) {
- String iconUrl = client.translateVaadinUri(icon);
- itemHtml = "<img src=\"" + iconUrl + "\" class=\""
- + Icon.CLASSNAME + "\" alt=\"\" />" + itemHtml;
- }
-
- if (isMultiselect()) {
- op = new VCheckBox();
- op.setHTML(itemHtml);
- } else {
- op = new RadioButton(id, itemHtml, true);
- op.setStyleName("v-radiobutton");
- }
-
- if (icon != null && icon.length() != 0) {
- Util.sinkOnloadForImages(op.getElement());
- op.addHandler(iconLoadHandler, LoadEvent.getType());
- }
-
- op.addStyleName(CLASSNAME_OPTION);
- op.setValue(opUidl.getBooleanAttribute("selected"));
- boolean enabled = !opUidl.getBooleanAttribute("disabled")
- && !isReadonly() && !isDisabled();
- op.setEnabled(enabled);
- setStyleName(op.getElement(),
- ApplicationConnection.DISABLED_CLASSNAME, !enabled);
- op.addClickHandler(this);
- optionsToKeys.put(op, opUidl.getStringAttribute("key"));
- panel.add(op);
- }
- }
-
- @Override
- protected String[] getSelectedItems() {
- return selectedKeys.toArray(new String[selectedKeys.size()]);
- }
-
- @Override
- public void onClick(ClickEvent event) {
- super.onClick(event);
- if (event.getSource() instanceof CheckBox) {
- final boolean selected = ((CheckBox) event.getSource()).getValue();
- final String key = optionsToKeys.get(event.getSource());
- if (!isMultiselect()) {
- selectedKeys.clear();
- }
- if (selected) {
- selectedKeys.add(key);
- } else {
- selectedKeys.remove(key);
- }
- client.updateVariable(id, "selected", getSelectedItems(),
- isImmediate());
- }
- }
-
- @Override
- protected void setTabIndex(int tabIndex) {
- for (Iterator<Widget> iterator = panel.iterator(); iterator.hasNext();) {
- FocusWidget widget = (FocusWidget) iterator.next();
- widget.setTabIndex(tabIndex);
- }
- }
-
- public void focus() {
- Iterator<Widget> iterator = panel.iterator();
- if (iterator.hasNext()) {
- ((Focusable) iterator.next()).setFocus(true);
- }
- }
-
- public void onFocus(FocusEvent arg0) {
- if (!blurOccured) {
- // no blur occured before this focus event
- // panel was blurred => fire the event to the server side if
- // requested by server side
- if (sendFocusEvents) {
- client.updateVariable(id, EventId.FOCUS, "", true);
- }
- } else {
- // blur occured before this focus event
- // another control inside the panel (checkbox / radio box) was
- // blurred => do not fire the focus and set blurOccured to false, so
- // blur will not be fired, too
- blurOccured = false;
- }
- }
-
- public void onBlur(BlurEvent arg0) {
- blurOccured = true;
- if (sendBlurEvents) {
- Scheduler.get().scheduleDeferred(new Command() {
- public void execute() {
- // check whether blurOccured still is true and then send the
- // event out to the server
- if (blurOccured) {
- client.updateVariable(id, EventId.BLUR, "", true);
- blurOccured = false;
- }
- }
- });
- }
- }
-
- public Widget getWidgetForPaintable() {
- return this;
- }
-
- }
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