/*
* Copyright 2008 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package com.google.gwt.sample.showcase.client.content.lists;
import com.google.gwt.core.client.GWT;
import com.google.gwt.core.client.RunAsyncCallback;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.i18n.client.Constants;
import com.google.gwt.resources.client.ImageResource;
import com.google.gwt.sample.showcase.client.ContentWidget;
import com.google.gwt.sample.showcase.client.ShowcaseAnnotations.ShowcaseData;
import com.google.gwt.sample.showcase.client.ShowcaseAnnotations.ShowcaseSource;
import com.google.gwt.sample.showcase.client.ShowcaseAnnotations.ShowcaseStyle;
import com.google.gwt.user.client.rpc.AsyncCallback;
import com.google.gwt.user.client.ui.AbstractImagePrototype;
import com.google.gwt.user.client.ui.CheckBox;
import com.google.gwt.user.client.ui.DecoratedStackPanel;
import com.google.gwt.user.client.ui.HTML;
import com.google.gwt.user.client.ui.HasVerticalAlignment;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.Image;
import com.google.gwt.user.client.ui.PopupPanel;
import com.google.gwt.user.client.ui.Tree;
import com.google.gwt.user.client.ui.TreeItem;
import com.google.gwt.user.client.ui.VerticalPanel;
import com.google.gwt.user.client.ui.Widget;
/**
* Example file.
*/
@ShowcaseStyle(value = {
".gwt-DecoratedStackPanel", "html>body .gwt-DecoratedStackPanel",
"* html .gwt-DecoratedStackPanel", ".cw-StackPanelHeader"})
public class CwStackPanel extends ContentWidget {
/**
* The constants used in this Content Widget.
*/
@ShowcaseSource
public static interface CwConstants extends Constants,
ContentWidget.CwConstants {
String[] cwStackPanelContacts();
String[] cwStackPanelContactsEmails();
String cwStackPanelContactsHeader();
String cwStackPanelDescription();
String[] cwStackPanelFilters();
String cwStackPanelFiltersHeader();
String[] cwStackPanelMailFolders();
String cwStackPanelMailHeader();
String cwStackPanelName();
}
/**
* Specifies the images that will be bundled for this example.
*
* We will override the leaf image used in the tree. Instead of using a blank
* 16x16 image, we will use a blank 1x1 image so it does not take up any
* space. Each TreeItem will use its own custom image.
*/
@ShowcaseSource
public interface Images extends Tree.Resources {
ImageResource contactsgroup();
ImageResource defaultContact();
ImageResource drafts();
ImageResource filtersgroup();
ImageResource inbox();
ImageResource mailgroup();
ImageResource sent();
ImageResource templates();
ImageResource trash();
/**
* Use noimage.png, which is a blank 1x1 image.
*/
@Source("noimage.png")
ImageResource treeLeaf();
}
/**
* An instance of the constants.
*/
@ShowcaseData
private CwConstants constants;
/**
* Constructor.
*
* @param constants the constants
*/
public CwStackPanel(CwConstants constants) {
super(constants);
this.constants = constants;
}
@Override
public String getDescription() {
return constants.cwStackPanelDescription();
}
@Override
public String getName() {
return constants.cwStackPanelName();
}
@Override
public boolean hasStyle() {
return true;
}
/**
* Initialize this example.
*/
@ShowcaseSource
@Override
public Widget onInitialize() {
// Get the images
Images images = (Images) GWT.create(Images.class);
// Create a new stack panel
DecoratedStackPanel stackPanel = new DecoratedStackPanel();
stackPanel.setWidth("200px");
// Add the Mail folders
String mailHeader = getHeaderString(constants.cwStackPanelMailHeader(),
images.mailgroup());
stackPanel.add(createMailItem(images), mailHeader, true);
// Add a list of filters
String filtersHeader = getHeaderString(
constants.cwStackPanelFiltersHeader(), images.filtersgroup());
stackPanel.add(createFiltersItem(), filtersHeader, true);
// Add a list of contacts
String contactsHeader = getHeaderString(
constants.cwStackPanelContactsHeader(), images.contactsgroup());
stackPanel.add(createContactsItem(images), contactsHeader, true);
// Return the stack panel
stackPanel.ensureDebugId("cwStackPanel");
return stackPanel;
}
@Override
protected void asyncOnInitialize(final AsyncCallback<Widget> callback) {
GWT.runAsync(new RunAsyncCallback() {
public void onFailure(Throwable caught) {
callback.onFailure(caught);
}
public void onSuccess() {
callback.onSuccess(onInitialize());
}
});
}
private void addItem(TreeItem root, ImageResource image, String label) {
root.addItem(AbstractImagePrototype.create(image).getHTML() + " " + label);
}
/**
* Create the list of Contacts.
*
* @param images the {@link Images} used in the Contacts
* @return the list of contacts
*/
@ShowcaseSource
private VerticalPanel createContactsItem(Images images) {
// Create a popup to show the contact info when a contact is clicked
HorizontalPanel contactPopupContainer = new HorizontalPanel();
contactPopupContainer.setSpacing(5);
contactPopupContainer.add(new Image(images.defaultContact()));
final HTML contactInfo = new HTML();
contactPopupContainer.add(contactInfo);
final PopupPanel contactPopup = new PopupPanel(true, false);
contactPopup.setWidget(contactPopupContainer);
// Create the list of contacts
VerticalPanel contactsPanel = new VerticalPanel();
contactsPanel.setSpacing(4);
String[] contactNames = constants.cwStackPanelContacts();
String[] contactEmails = constants.cwStackPanelContactsEmails();
for (int i = 0; i < contactNames.length; i++) {
final String contactName = contactNames[i];
final String contactEmail = contactEmails[i];
final HTML contactLink = new HTML("<a href=\"javascript:undefined;\">"
+ contactName + "</a>");
contactsPanel.add(contactLink);
// Open the contact info popup when the user clicks a contact
contactLink.addClickHandler(new ClickHandler() {
public void onClick(ClickEvent event) {
// Set the info about the contact
contactInfo.setHTML(contactName + "<br><i>" + contactEmail + "</i>");
// Show the popup of contact info
int left = contactLink.getAbsoluteLeft() + 14;
int top = contactLink.getAbsoluteTop() + 14;
contactPopup.setPopupPosition(left, top);
contactPopup.show();
}
});
}
return contactsPanel;
}
/**
* Create the list of filters for the Filters item.
*
* @return the list of filters
*/
@ShowcaseSource
private VerticalPanel createFiltersItem() {
VerticalPanel filtersPanel = new VerticalPanel();
filtersPanel.setSpacing(4);
for (String filter : constants.cwStackPanelFilters()) {
filtersPanel.add(new CheckBox(filter));
}
return filtersPanel;
}
/**
* Create the {@link Tree} of Mail options.
*
* @param images the {@link Images} used in the Mail options
* @return the {@link Tree} of mail options
*/
@ShowcaseSource
private Tree createMailItem(Images images) {
Tree mailPanel = new Tree(images);
TreeItem mailPanelRoot = mailPanel.addItem("foo@example.com");
String[] mailFolders = constants.cwStackPanelMailFolders();
addItem(mailPanelRoot, images.inbox(), mailFolders[0]);
addItem(mailPanelRoot, images.drafts(), mailFolders[1]);
addItem(mailPanelRoot, images.templates(), mailFolders[2]);
addItem(mailPanelRoot, images.sent(), mailFolders[3]);
addItem(mailPanelRoot, images.trash(), mailFolders[4]);
mailPanelRoot.setState(true);
return mailPanel;
}
/**
* Get a string representation of the header that includes an image and some
* text.
*
* @param text the header text
* @param image the {@link ImageResource} to add next to the header
* @return the header as a string
*/
@ShowcaseSource
private String getHeaderString(String text, ImageResource image) {
// Add the image and text to a horizontal panel
HorizontalPanel hPanel = new HorizontalPanel();
hPanel.setSpacing(0);
hPanel.setVerticalAlignment(HasVerticalAlignment.ALIGN_MIDDLE);
hPanel.add(new Image(image));
HTML headerText = new HTML(text);
headerText.setStyleName("cw-StackPanelHeader");
hPanel.add(headerText);
// Return the HTML string for the panel
return hPanel.getElement().getString();
}
}