Notifications API.

+ small fix for richtextarea

svn changeset:2712/svn branch:trunk

6 files changed, 604 insertions, 64 deletions

diff --git a/src/com/itmill/toolkit/demo/NotificationDemo.java b/src/com/itmill/toolkit/demo/NotificationDemo.java
new file mode 100644
index 0000000000..00cfd182dc
--- /dev/null
+++ b/src/com/itmill/toolkit/demo/NotificationDemo.java
@@ -0,0 +1,82 @@
+package com.itmill.toolkit.demo;
+
+import com.itmill.toolkit.data.Item;
+import com.itmill.toolkit.ui.Button;
+import com.itmill.toolkit.ui.NativeSelect;
+import com.itmill.toolkit.ui.RichTextArea;
+import com.itmill.toolkit.ui.Select;
+import com.itmill.toolkit.ui.TextField;
+import com.itmill.toolkit.ui.Window;
+import com.itmill.toolkit.ui.Button.ClickEvent;
+import com.itmill.toolkit.ui.Button.ClickListener;
+
+/**
+ * Demonstrates the use of Notifications.
+ * 
+ * @author IT Mill Ltd.
+ * @see com.itmill.toolkit.ui.Window
+ */
+public class NotificationDemo extends com.itmill.toolkit.Application {
+
+	NativeSelect type;
+	TextField caption;
+	TextField message;
+
+	/**
+	 * The initialization method that is the only requirement for inheriting the
+	 * com.itmill.toolkit.service.Application class. It will be automatically
+	 * called by the framework when a user accesses the application.
+	 */
+	public void init() {
+
+		/*
+		 * - Create new window for the application - Give the window a visible
+		 * title - Set the window to be the main window of the application
+		 */
+		Window main = new Window("Notification demo");
+		setMainWindow(main);
+
+		Window conf = new Window("Show Notification");
+		conf.setWidth(450);
+		conf.setHeight(340);
+		main.addWindow(conf);
+
+		type = new NativeSelect("Notification type");
+		type.addContainerProperty("caption", String.class, null);
+		type.setNullSelectionAllowed(false);
+		type.setItemCaptionMode(Select.ITEM_CAPTION_MODE_PROPERTY);
+		type.setItemCaptionPropertyId("caption");
+		Item i = type.addItem(new Integer(
+				Window.Notification.TYPE_HUMANIZED_MESSAGE));
+		i.getItemProperty("caption").setValue("Humanized message");
+		i = type.addItem(new Integer(Window.Notification.TYPE_WARNING_MESSAGE));
+		i.getItemProperty("caption").setValue("Warning message");
+		i = type.addItem(new Integer(Window.Notification.TYPE_ERROR_MESSAGE));
+		i.getItemProperty("caption").setValue("Error message");
+		i = type
+				.addItem(new Integer(Window.Notification.TYPE_TRAY_NOTIFICATION));
+		i.getItemProperty("caption").setValue("Tray notification");
+		type.setValue(new Integer(Window.Notification.TYPE_HUMANIZED_MESSAGE));
+		conf.addComponent(type);
+
+		caption = new TextField("Caption");
+		caption.setValue("Saved!");
+		caption.setColumns(20);
+		conf.addComponent(caption);
+
+		message = new RichTextArea();
+		message.setCaption("Message");
+		message.setValue("Your stuff has been saved in <b>MyDocuments</b>.");
+		conf.addComponent(message);
+
+		Button b = new Button("Show notification", new ClickListener() {
+			public void buttonClick(ClickEvent event) {
+				getMainWindow().showNotification((String) caption.getValue(),
+						(String) message.getValue(),
+						((Integer) type.getValue()).intValue());
+			}
+
+		});
+		conf.addComponent(b);
+	}
+}
diff --git a/src/com/itmill/toolkit/terminal/gwt/client/ui/Notification.java b/src/com/itmill/toolkit/terminal/gwt/client/ui/Notification.java
new file mode 100644
index 0000000000..cd4740007e
--- /dev/null
+++ b/src/com/itmill/toolkit/terminal/gwt/client/ui/Notification.java
@@ -0,0 +1,229 @@
+package com.itmill.toolkit.terminal.gwt.client.ui;

+

+import com.google.gwt.user.client.DOM;

+import com.google.gwt.user.client.Element;

+import com.google.gwt.user.client.Event;

+import com.google.gwt.user.client.EventPreview;

+import com.google.gwt.user.client.Timer;

+import com.google.gwt.user.client.ui.HTML;

+import com.google.gwt.user.client.ui.PopupPanel;

+import com.google.gwt.user.client.ui.Widget;

+

+public class Notification extends PopupPanel {

+

+	public static final int CENTERED = 1;

+	public static final int CENTERED_TOP = 2;

+	public static final int CENTERED_BOTTOM = 3;

+	public static final int TOP_LEFT = 4;

+	public static final int TOP_RIGHT = 5;

+	public static final int BOTTOM_LEFT = 6;

+	public static final int BOTTOM_RIGHT = 7;

+

+	public static final int DELAY_FOREVER = -1;

+	public static final int DELAY_NONE = 0;

+

+	private static final String STYLENAME = "i-Notification";

+	private static final int mouseMoveThreshold = 7;

+	private static final int Z_INDEX_BASE = 20000;

+

+	private int startOpacity = 90;

+	private int fadeMsec = 400;

+	private int delayMsec = 1000;

+

+	private Timer fader;

+	private Timer delay;

+	private EventPreview eventPreview;

+

+	private String temporaryStyle;

+

+	public Notification() {

+		setStylePrimaryName(STYLENAME);

+		sinkEvents(Event.ONCLICK);

+		DOM.setStyleAttribute(getElement(), "zIndex", "" + Z_INDEX_BASE);

+	}

+

+	public Notification(int delayMsec) {

+		this();

+		this.delayMsec = delayMsec;

+	}

+

+	public Notification(int delayMsec, int fadeMsec, int startOpacity) {

+		this(delayMsec);

+		this.fadeMsec = fadeMsec;

+		this.startOpacity = startOpacity;

+	}

+

+	public void startDelay() {

+		DOM.removeEventPreview(eventPreview);

+		if (delayMsec > 0) {

+			delay = new Timer() {

+				public void run() {

+					fade();

+				}

+			};

+			delay.scheduleRepeating(delayMsec);

+		} else if (delayMsec == 0) {

+			fade();

+		}

+	}

+

+	public void show() {

+		show(CENTERED);

+	}

+

+	public void show(String style) {

+		show(CENTERED, style);

+	}

+

+	public void show(int position) {

+		show(position, null);

+	}

+

+	public void show(Widget widget, int position, String style) {

+		setWidget(widget);

+		show(position, style);

+	}

+

+	public void show(String html, int position, String style) {

+		setWidget(new HTML(html));

+		show(position, style);

+	}

+

+	public void show(int position, String style) {

+		hide();

+		setOpacity(getElement(), startOpacity);

+		if (style != null) {

+			this.temporaryStyle = style;

+			addStyleName(style);

+		}

+		super.show();

+		setPosition(position);

+

+		if (eventPreview == null) {

+			eventPreview = new EventPreview() {

+				int x = -1;

+				int y = -1;

+

+				public boolean onEventPreview(Event event) {

+					switch (DOM.eventGetType(event)) {

+					case Event.ONMOUSEMOVE:

+						if (x < 0) {

+							x = DOM.eventGetClientX(event);

+							y = DOM.eventGetClientY(event);

+						} else if (Math.abs(DOM.eventGetClientX(event) - x) > mouseMoveThreshold

+								|| Math.abs(DOM.eventGetClientY(event) - y) > mouseMoveThreshold) {

+							startDelay();

+						}

+						break;

+					case Event.KEYEVENTS:

+					case Event.ONCLICK:

+					case Event.ONDBLCLICK:

+					case Event.ONSCROLL:

+					default:

+						startDelay();

+					}

+					return true;

+				}

+			};

+		}

+

+		DOM.addEventPreview(eventPreview);

+	}

+

+	public void hide() {

+		DOM.removeEventPreview(eventPreview);

+		cancelDelay();

+		cancelFade();

+		if (this.temporaryStyle != null) {

+			removeStyleName(this.temporaryStyle);

+			this.temporaryStyle = null;

+		}

+		super.hide();

+	}

+

+	public void fade() {

+		cancelDelay();

+		fader = new Timer() {

+			int opacity = startOpacity;

+

+			public void run() {

+				opacity -= 5;

+				setOpacity(getElement(), opacity);

+				if (opacity <= 0) {

+					cancel();

+					hide();

+				}

+			}

+		};

+		int msec = fadeMsec / (startOpacity / 5);

+		fader.scheduleRepeating(msec);

+	}

+

+	public void setPosition(int position) {

+		Element el = getElement();

+		DOM.setStyleAttribute(el, "top", null);

+		DOM.setStyleAttribute(el, "left", null);

+		DOM.setStyleAttribute(el, "bottom", null);

+		DOM.setStyleAttribute(el, "right", null);

+		switch (position) {

+		case TOP_LEFT:

+			DOM.setStyleAttribute(el, "top", "0px");

+			DOM.setStyleAttribute(el, "left", "0px");

+			break;

+		case TOP_RIGHT:

+			DOM.setStyleAttribute(el, "top", "0px");

+			DOM.setStyleAttribute(el, "right", "0px");

+			break;

+		case BOTTOM_RIGHT:

+			DOM.setStyleAttribute(el, "position", "absolute");

+			DOM.setStyleAttribute(el, "bottom", "0px");

+			DOM.setStyleAttribute(el, "right", "0px");

+			break;

+		case BOTTOM_LEFT:

+			DOM.setStyleAttribute(el, "bottom", "0px");

+			DOM.setStyleAttribute(el, "left", "0px");

+			break;

+		case CENTERED_TOP:

+			center();

+			DOM.setStyleAttribute(el, "top", "0px");

+			break;

+		case CENTERED_BOTTOM:

+			center();

+			DOM.setStyleAttribute(el, "top", null);

+			DOM.setStyleAttribute(el, "bottom", "0px");

+			break;

+		default:

+		case CENTERED:

+			center();

+			break;

+		}

+	}

+

+	private void cancelFade() {

+		if (fader != null) {

+			fader.cancel();

+			fader = null;

+		}

+	}

+

+	private void cancelDelay() {

+		if (delay != null) {

+			delay.cancel();

+			delay = null;

+		}

+	}

+

+	private void setOpacity(Element el, int opacity) {

+		DOM.setStyleAttribute(el, "opacity", "" + (opacity / 100.0));

+		DOM.setStyleAttribute(el, "filter", "Alpha(opacity=" + opacity + ")");

+

+	}

+

+	public void onBrowserEvent(Event event) {

+		DOM.removeEventPreview(eventPreview);

+		if (fader == null) {

+			fade();

+		}

+	}

+

+}

diff --git a/src/com/itmill/toolkit/terminal/gwt/client/ui/richtextarea/IRichTextArea.java b/src/com/itmill/toolkit/terminal/gwt/client/ui/richtextarea/IRichTextArea.java
index e2af2fd2b8..03c73e9e9d 100644
--- a/src/com/itmill/toolkit/terminal/gwt/client/ui/richtextarea/IRichTextArea.java
+++ b/src/com/itmill/toolkit/terminal/gwt/client/ui/richtextarea/IRichTextArea.java
@@ -29,18 +29,18 @@ public class IRichTextArea extends Composite implements Paintable,
 	protected ApplicationConnection client;
 
 	private boolean immediate = false;
-	
+
 	RichTextArea rta = new RichTextArea();
-	
+
 	RichTextToolbar formatter = new RichTextToolbar(rta);
 
 	public IRichTextArea() {
 		FlowPanel fp = new FlowPanel();
 		fp.add(formatter);
-		
+
 		rta.setWidth("100%");
 		rta.addFocusListener(this);
-		
+
 		fp.add(rta);
 
 		initWidget(fp);
@@ -51,28 +51,30 @@ public class IRichTextArea extends Composite implements Paintable,
 		this.client = client;
 		id = uidl.getId();
 
-		if (client.updateComponent(this, uidl, true))
+		if (client.updateComponent(this, uidl, true)) {
 			return;
+		}
 
 		immediate = uidl.getBooleanAttribute("immediate");
-		
-		rta.setText(uidl.getStringAttribute("text"));
+
+		rta.setHTML(uidl.getStringVariable("text"));
 
 	}
 
 	public void onChange(Widget sender) {
-		if (client != null && id != null)
+		if (client != null && id != null) {
 			client.updateVariable(id, "text", rta.getText(), immediate);
+		}
 	}
 
 	public void onFocus(Widget sender) {
-		
+
 	}
 
 	public void onLostFocus(Widget sender) {
 		String html = rta.getHTML();
 		client.updateVariable(id, "text", html, immediate);
-		
+
 	}
 
 }
diff --git a/src/com/itmill/toolkit/terminal/gwt/public/default/styles.css b/src/com/itmill/toolkit/terminal/gwt/public/default/styles.css
index e5e037f988..3935cf07aa 100644
--- a/src/com/itmill/toolkit/terminal/gwt/public/default/styles.css
+++ b/src/com/itmill/toolkit/terminal/gwt/public/default/styles.css
@@ -8,6 +8,7 @@
 @import "table/table.css";

 @import "slider/slider.css";

 @import "window/window.css";

+@import "window/notification.css";

 @import "caption/caption.css";

 @import "tree/tree.css";

 @import "splitpanel/splitpanel.css";

diff --git a/src/com/itmill/toolkit/terminal/gwt/public/default/window/notification.css b/src/com/itmill/toolkit/terminal/gwt/public/default/window/notification.css
new file mode 100644
index 0000000000..3156f387b0
--- /dev/null
+++ b/src/com/itmill/toolkit/terminal/gwt/public/default/window/notification.css
@@ -0,0 +1,38 @@
+

+.i-Notification {

+	font-family: "Trebuchet MS", geneva, helvetica, arial, tahoma, verdana, sans-serif;

+	background-color: #ffffff;

+	color: #cccccc;

+	border: 10px solid #cccccc;

+	padding: 0.2em;

+	cursor: pointer;

+}

+.i-Notification H1,

+.i-Notification p,

+.i-Notification.error H1,

+.i-Notification.error p,

+.i-Notification.warning H1,

+.i-Notification.warning p {

+	display: inline;

+	padding: 0.1em;

+}

+.i-Notification.tray H1,

+.i-Notification.tray p {

+	display: block;

+	font-size: 1em;

+	line-height: 0.5em;

+}

+

+.i-Notification.warning {

+	border-color: #f14c1a;

+	color: #f14c1a;

+}

+

+.i-Notification.error {

+	color: #ff0a0a;

+	border-color: #ff0a0a;

+}

+.i-Notification.tray {

+	color: #000000;

+	border-bottom: none;

+}

diff --git a/src/com/itmill/toolkit/ui/Window.java b/src/com/itmill/toolkit/ui/Window.java
index 411f977f81..376e056756 100644
--- a/src/com/itmill/toolkit/ui/Window.java
+++ b/src/com/itmill/toolkit/ui/Window.java
@@ -28,18 +28,6 @@
 
 package com.itmill.toolkit.ui;
 
-import com.itmill.toolkit.Application;
-import com.itmill.toolkit.Application.WindowAttachEvent;
-import com.itmill.toolkit.Application.WindowAttachListener;
-import com.itmill.toolkit.terminal.DownloadStream;
-import com.itmill.toolkit.terminal.PaintException;
-import com.itmill.toolkit.terminal.PaintTarget;
-import com.itmill.toolkit.terminal.ParameterHandler;
-import com.itmill.toolkit.terminal.Resource;
-import com.itmill.toolkit.terminal.Sizeable;
-import com.itmill.toolkit.terminal.Terminal;
-import com.itmill.toolkit.terminal.URIHandler;
-
 import java.lang.ref.WeakReference;
 import java.lang.reflect.Method;
 import java.net.MalformedURLException;
@@ -47,11 +35,21 @@ import java.net.URL;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.HashSet;
+import java.util.Iterator;
 import java.util.LinkedList;
 import java.util.Map;
-import java.util.Iterator;
 import java.util.Set;
 
+import com.itmill.toolkit.Application;
+import com.itmill.toolkit.terminal.DownloadStream;
+import com.itmill.toolkit.terminal.PaintException;
+import com.itmill.toolkit.terminal.PaintTarget;
+import com.itmill.toolkit.terminal.ParameterHandler;
+import com.itmill.toolkit.terminal.Resource;
+import com.itmill.toolkit.terminal.Sizeable;
+import com.itmill.toolkit.terminal.Terminal;
+import com.itmill.toolkit.terminal.URIHandler;
+
 /**
  * Application window component.
  * 
@@ -98,7 +96,7 @@ public class Window extends Panel implements URIHandler, ParameterHandler {
 	private LinkedList parameterHandlerList = null;
 
 	/** Set of subwindows */
-	private HashSet subwindows = new HashSet();
+	private final HashSet subwindows = new HashSet();
 
 	/**
 	 * Explicitly specified theme of this window. If null, application theme is
@@ -109,7 +107,7 @@ public class Window extends Panel implements URIHandler, ParameterHandler {
 	/**
 	 * Resources to be opened automatically on next repaint.
 	 */
-	private LinkedList openList = new LinkedList();
+	private final LinkedList openList = new LinkedList();
 
 	/**
 	 * The name of the window.
@@ -148,6 +146,8 @@ public class Window extends Panel implements URIHandler, ParameterHandler {
 	 */
 	private int scrollLeft = 0;
 
+	private LinkedList notifications;
+
 	/* ********************************************************************* */
 
 	/**
@@ -240,8 +240,9 @@ public class Window extends Panel implements URIHandler, ParameterHandler {
 	 * @return the parent application of the component.
 	 */
 	public final Application getApplication() {
-		if (getParent() == null)
+		if (getParent() == null) {
 			return this.application;
+		}
 		return ((Window) getParent()).getApplication();
 	}
 
@@ -300,11 +301,13 @@ public class Window extends Panel implements URIHandler, ParameterHandler {
 	public void addURIHandler(URIHandler handler) {
 		// TODO Subwindow support
 
-		if (uriHandlerList == null)
+		if (uriHandlerList == null) {
 			uriHandlerList = new LinkedList();
+		}
 		synchronized (uriHandlerList) {
-			if (!uriHandlerList.contains(handler))
+			if (!uriHandlerList.contains(handler)) {
 				uriHandlerList.addLast(handler);
+			}
 		}
 	}
 
@@ -317,12 +320,14 @@ public class Window extends Panel implements URIHandler, ParameterHandler {
 	public void removeURIHandler(URIHandler handler) {
 		// TODO Subwindow support
 
-		if (handler == null || uriHandlerList == null)
+		if (handler == null || uriHandlerList == null) {
 			return;
+		}
 		synchronized (uriHandlerList) {
 			uriHandlerList.remove(handler);
-			if (uriHandlerList.isEmpty())
+			if (uriHandlerList.isEmpty()) {
 				uriHandlerList = null;
+			}
 		}
 	}
 
@@ -345,10 +350,11 @@ public class Window extends Panel implements URIHandler, ParameterHandler {
 				DownloadStream ds = ((URIHandler) handlers[i]).handleURI(
 						context, relativeUri);
 				if (ds != null) {
-					if (result != null)
+					if (result != null) {
 						throw new RuntimeException("handleURI for " + context
 								+ " uri: '" + relativeUri
 								+ "' returns ambigious result.");
+					}
 					result = ds;
 				}
 			}
@@ -366,11 +372,13 @@ public class Window extends Panel implements URIHandler, ParameterHandler {
 	 */
 	public void addParameterHandler(ParameterHandler handler) {
 		// TODO Subwindow support
-		if (parameterHandlerList == null)
+		if (parameterHandlerList == null) {
 			parameterHandlerList = new LinkedList();
+		}
 		synchronized (parameterHandlerList) {
-			if (!parameterHandlerList.contains(handler))
+			if (!parameterHandlerList.contains(handler)) {
 				parameterHandlerList.addLast(handler);
+			}
 		}
 	}
 
@@ -382,12 +390,14 @@ public class Window extends Panel implements URIHandler, ParameterHandler {
 	 */
 	public void removeParameterHandler(ParameterHandler handler) {
 		// TODO Subwindow support
-		if (handler == null || parameterHandlerList == null)
+		if (handler == null || parameterHandlerList == null) {
 			return;
+		}
 		synchronized (parameterHandlerList) {
 			parameterHandlerList.remove(handler);
-			if (parameterHandlerList.isEmpty())
+			if (parameterHandlerList.isEmpty()) {
 				parameterHandlerList = null;
+			}
 		}
 	}
 
@@ -398,8 +408,9 @@ public class Window extends Panel implements URIHandler, ParameterHandler {
 			synchronized (parameterHandlerList) {
 				handlers = parameterHandlerList.toArray();
 			}
-			for (int i = 0; i < handlers.length; i++)
+			for (int i = 0; i < handlers.length; i++) {
 				((ParameterHandler) handlers[i]).handleParameters(parameters);
+			}
 		}
 	}
 
@@ -419,14 +430,18 @@ public class Window extends Panel implements URIHandler, ParameterHandler {
 	 *         returned
 	 */
 	public String getTheme() {
-		if (getParent() != null)
+		if (getParent() != null) {
 			return ((Window) getParent()).getTheme();
-		if (theme != null)
+		}
+		if (theme != null) {
 			return theme;
-		if ((application != null) && (application.getTheme() != null))
+		}
+		if ((application != null) && (application.getTheme() != null)) {
 			return application.getTheme();
-		if (terminal != null)
+		}
+		if (terminal != null) {
 			return terminal.getDefaultTheme();
+		}
 		return null;
 	}
 
@@ -439,9 +454,10 @@ public class Window extends Panel implements URIHandler, ParameterHandler {
 	 *            the New theme for this window. Null implies the default theme.
 	 */
 	public void setTheme(String theme) {
-		if (getParent() != null)
+		if (getParent() != null) {
 			throw new UnsupportedOperationException(
 					"Setting theme for sub-windws is not supported.");
+		}
 		this.theme = theme;
 		requestRepaint();
 	}
@@ -467,14 +483,16 @@ public class Window extends Panel implements URIHandler, ParameterHandler {
 
 		// Marks the main window
 		if (getApplication() != null
-				&& this == getApplication().getMainWindow())
+				&& this == getApplication().getMainWindow()) {
 			target.addAttribute("main", true);
+		}
 
 		// Open requested resource
 		synchronized (openList) {
 			if (!openList.isEmpty()) {
-				for (Iterator i = openList.iterator(); i.hasNext();)
+				for (Iterator i = openList.iterator(); i.hasNext();) {
 					((OpenResource) i.next()).paintContent(target);
+				}
 				openList.clear();
 			}
 		}
@@ -494,11 +512,12 @@ public class Window extends Panel implements URIHandler, ParameterHandler {
 		target.addVariable(this, "close", false);
 
 		// Sets the focused component
-		if (this.focusedComponent != null)
+		if (this.focusedComponent != null) {
 			target.addVariable(this, "focused", ""
 					+ this.focusedComponent.getFocusableId());
-		else
+		} else {
 			target.addVariable(this, "focused", "");
+		}
 
 		// Paint subwindows
 		for (Iterator i = subwindows.iterator(); i.hasNext();) {
@@ -506,6 +525,29 @@ public class Window extends Panel implements URIHandler, ParameterHandler {
 			w.paint(target);
 		}
 
+		// Paint notifications
+		if (this.notifications != null) {
+			target.startTag("notifications");
+			for (Iterator it = this.notifications.iterator(); it.hasNext();) {
+				Notification n = (Notification) it.next();
+				target.startTag("notification");
+				if (n.getCaption() != null) {
+					target.addAttribute("caption", n.getCaption());
+				}
+				if (n.getMessage() != null) {
+					target.addAttribute("message", n.getMessage());
+				}
+				target.addAttribute("position", n.getPosition());
+				target.addAttribute("delay", n.getDelayMsec());
+				if (n.getStyleName() != null) {
+					target.addAttribute("style", n.getStyleName());
+				}
+				target.endTag("notification");
+			}
+			target.endTag("notifications");
+			this.notifications = null;
+		}
+
 	}
 
 	/* ********************************************************************* */
@@ -517,9 +559,10 @@ public class Window extends Panel implements URIHandler, ParameterHandler {
 	 */
 	public void open(Resource resource) {
 		synchronized (openList) {
-			if (!openList.contains(resource))
+			if (!openList.contains(resource)) {
 				openList.add(new OpenResource(resource, null, -1, -1,
 						BORDER_DEFAULT));
+			}
 		}
 		requestRepaint();
 	}
@@ -538,9 +581,10 @@ public class Window extends Panel implements URIHandler, ParameterHandler {
 	 */
 	public void open(Resource resource, String windowName) {
 		synchronized (openList) {
-			if (!openList.contains(resource))
+			if (!openList.contains(resource)) {
 				openList.add(new OpenResource(resource, windowName, -1, -1,
 						BORDER_DEFAULT));
+			}
 		}
 		requestRepaint();
 	}
@@ -561,9 +605,10 @@ public class Window extends Panel implements URIHandler, ParameterHandler {
 	public void open(Resource resource, String windowName, int width,
 			int height, int border) {
 		synchronized (openList) {
-			if (!openList.contains(resource))
+			if (!openList.contains(resource)) {
 				openList.add(new OpenResource(resource, windowName, width,
 						height, border));
+			}
 		}
 		requestRepaint();
 	}
@@ -578,8 +623,9 @@ public class Window extends Panel implements URIHandler, ParameterHandler {
 	 */
 	public URL getURL() {
 
-		if (application == null)
+		if (application == null) {
 			return null;
+		}
 
 		try {
 			return new URL(application.getURL(), getName() + "/");
@@ -651,8 +697,9 @@ public class Window extends Panel implements URIHandler, ParameterHandler {
 	public void setApplication(Application application) {
 
 		// If the application is not changed, dont do nothing
-		if (application == this.application)
+		if (application == this.application) {
 			return;
+		}
 
 		// Sends detach event if the window is connected to application
 		if (this.application != null) {
@@ -663,8 +710,9 @@ public class Window extends Panel implements URIHandler, ParameterHandler {
 		this.application = application;
 
 		// Sends the attach event if connected to a window
-		if (application != null)
+		if (application != null) {
 			attach();
+		}
 	}
 
 	/**
@@ -684,10 +732,11 @@ public class Window extends Panel implements URIHandler, ParameterHandler {
 	public void setName(String name) {
 
 		// The name can not be changed in application
-		if (getApplication() != null)
+		if (getApplication() != null) {
 			throw new IllegalStateException(
 					"Window name can not be changed while "
 							+ "the window is in application");
+		}
 
 		this.name = name;
 	}
@@ -709,8 +758,9 @@ public class Window extends Panel implements URIHandler, ParameterHandler {
 	 * @see com.itmill.toolkit.terminal.Sizeable#getHeightUnits()
 	 */
 	public void setHeightUnits(int units) {
-		if (units != Sizeable.UNITS_PIXELS)
+		if (units != Sizeable.UNITS_PIXELS) {
 			throw new IllegalArgumentException("Only pixels are supported");
+		}
 	}
 
 	/**
@@ -719,8 +769,9 @@ public class Window extends Panel implements URIHandler, ParameterHandler {
 	 * @see com.itmill.toolkit.terminal.Sizeable#getWidthUnits()
 	 */
 	public void setWidthUnits(int units) {
-		if (units != Sizeable.UNITS_PIXELS)
+		if (units != Sizeable.UNITS_PIXELS) {
 			throw new IllegalArgumentException("Only pixels are supported");
+		}
 	}
 
 	/**
@@ -728,15 +779,15 @@ public class Window extends Panel implements URIHandler, ParameterHandler {
 	 */
 	private class OpenResource {
 
-		private Resource resource;
+		private final Resource resource;
 
-		private String name;
+		private final String name;
 
-		private int width;
+		private final int width;
 
-		private int height;
+		private final int height;
 
-		private int border;
+		private final int border;
 
 		/**
 		 * Creates a new open resource.
@@ -767,12 +818,15 @@ public class Window extends Panel implements URIHandler, ParameterHandler {
 		private void paintContent(PaintTarget target) throws PaintException {
 			target.startTag("open");
 			target.addAttribute("src", resource);
-			if (name != null && name.length() > 0)
+			if (name != null && name.length() > 0) {
 				target.addAttribute("name", name);
-			if (width >= 0)
+			}
+			if (width >= 0) {
 				target.addAttribute("width", width);
-			if (height >= 0)
+			}
+			if (height >= 0) {
 				target.addAttribute("height", height);
+			}
 			switch (border) {
 			case Window.BORDER_MINIMAL:
 				target.addAttribute("border", "minimal");
@@ -1052,12 +1106,14 @@ public class Window extends Panel implements URIHandler, ParameterHandler {
 	public void addWindow(Window window) throws IllegalArgumentException,
 			NullPointerException {
 
-		if (getParent() != null)
+		if (getParent() != null) {
 			throw new IllegalArgumentException(
 					"You can only add windows inside application-level windows");
+		}
 
-		if (window == null)
+		if (window == null) {
 			throw new NullPointerException("Argument must not be null");
+		}
 
 		subwindows.add(window);
 		window.setParent(this);
@@ -1124,4 +1180,136 @@ public class Window extends Panel implements URIHandler, ParameterHandler {
 		this.scrollLeft = scrollLeft;
 	}
 
+	public void showNotification(String message) {
+		addNotification(new Notification(message));
+	}
+
+	public void showNotification(String message, int type) {
+		addNotification(new Notification(message, type));
+	}
+
+	public void showNotification(String caption, String message, int type) {
+		addNotification(new Notification(caption, message, type));
+	}
+
+	public void showNotification(Notification notification) {
+		addNotification(notification);
+	}
+
+	private void addNotification(Notification notification) {
+		if (this.notifications == null) {
+			this.notifications = new LinkedList();
+		}
+		this.notifications.add(notification);
+		requestRepaint();
+	}
+
+	public class Notification {
+		public static final int TYPE_HUMANIZED_MESSAGE = 1;
+		public static final int TYPE_WARNING_MESSAGE = 2;
+		public static final int TYPE_ERROR_MESSAGE = 3;
+		public static final int TYPE_TRAY_NOTIFICATION = 4;
+
+		public static final int POSITION_CENTERED = 1;
+		public static final int POSITION_CENTERED_TOP = 2;
+		public static final int POSITION_CENTERED_BOTTOM = 3;
+		public static final int POSITION_TOP_LEFT = 4;
+		public static final int POSITION_TOP_RIGHT = 5;
+		public static final int POSITION_BOTTOM_LEFT = 6;
+		public static final int POSITION_BOTTOM_RIGHT = 7;
+
+		public static final int DELAY_FOREVER = -1;
+		public static final int DELAY_NONE = 0;
+
+		private String caption;
+		private String message;
+		private Resource icon;
+		private int position = POSITION_CENTERED;
+		private int delayMsec = 0;
+		private String styleName;
+
+		public Notification(String message) {
+			this(null, message, TYPE_HUMANIZED_MESSAGE);
+		}
+
+		public Notification(String message, int type) {
+			this(null, message, type);
+		}
+
+		public Notification(String caption, String message, int type) {
+			this.caption = caption;
+			this.message = message;
+			setType(type);
+		}
+
+		private void setType(int type) {
+			switch (type) {
+			case TYPE_WARNING_MESSAGE:
+				delayMsec = 1500;
+				styleName = "warning";
+				break;
+			case TYPE_ERROR_MESSAGE:
+				delayMsec = -1;
+				styleName = "error";
+				break;
+			case TYPE_TRAY_NOTIFICATION:
+				delayMsec = 3000;
+				position = POSITION_BOTTOM_RIGHT;
+				styleName = "tray";
+
+			case TYPE_HUMANIZED_MESSAGE:
+			default:
+				break;
+			}
+
+		}
+
+		public String getCaption() {
+			return caption;
+		}
+
+		public void setCaption(String caption) {
+			this.caption = caption;
+		}
+
+		public String getMessage() {
+			return message;
+		}
+
+		public void setMessage(String message) {
+			this.message = message;
+		}
+
+		public int getPosition() {
+			return position;
+		}
+
+		public void setPosition(int position) {
+			this.position = position;
+		}
+
+		public Resource getIcon() {
+			return icon;
+		}
+
+		public void setIcon(Resource icon) {
+			this.icon = icon;
+		}
+
+		public int getDelayMsec() {
+			return delayMsec;
+		}
+
+		public void setDelayMsec(int delayMsec) {
+			this.delayMsec = delayMsec;
+		}
+
+		public void setStyleName(String styleName) {
+			this.styleName = styleName;
+		}
+
+		public String getStyleName() {
+			return this.styleName;
+		}
+	}
 }