Download Google Web Toolkit Solutions: More Cool & Useful Stuff by David Geary, Rob Gordon PDF

By David Geary, Rob Gordon



Google net Toolkit (GWT) is an open resource Java improvement framework for construction Ajax-enabled internet functions. rather than the hodgepodge of applied sciences that builders commonly use for Ajax–JavaScript, HTML, CSS, and XMLHttpRequest–GWT we could builders enforce wealthy customer purposes with natural Java, utilizing generic idioms from the AWT, Swing, and SWT. GWT is going past so much Ajax frameworks via making it effortless to construct desktop-like purposes that run within the ubiquitous browser, the place the richness of the person interface is restricted in simple terms by means of the developer’s imagination.


This publication makes a speciality of the extra complicated features of GWT it is advisable enforce real-world purposes with wealthy consumer interfaces yet with no the heavy lifting of JavaScript and different Ajax-related applied sciences. every one resolution during this functional, hands-on ebook is greater than a recipe. The pattern courses are conscientiously defined intimately that can assist you fast grasp complicated GWT ideas, comparable to enforcing drag-and-drop, integrating JavaScript libraries, and utilizing complex occasion dealing with methodologies.


Solutions coated include

•   construction customized GWT widgets, together with either high-level composites and low-level components

•   imposing a viewport classification that comes with iPhone-style automatic scrolling

•   Integrating net prone with GWT applications

•   Incorporating the JavaScript framework into GWT applications

•   Combining Hibernate and GWT to enforce database-backed internet applications

•   Extending the GWT PopupPanel type to enforce a draggable and resizable window

•   making a drag-and-drop module, entire with drag resources and drop targets

•   Deploying GWT purposes to an exterior server

•   Dynamically resizing flex tables

•   utilizing GWT widgets in legacy purposes constructed with different frameworks, similar to Struts and JavaServer Faces


Complete pattern Code to be had at


All of the code utilized in this ebook has been proven, either in hosted and net modes, and in an exterior model of Tomcat (version 5.5.17), less than home windows, Linux, and Mac OS X. For home windows and Linux, we used 1.4.60, and for the Mac we used 1.4.61.  NOTE: There are 3 separate types of the code. Please obtain the right kind JAR dossier for the working method you're using.

Foreword xiii

Preface xvi

Acknowledgments xviii

About the Authors xix


Solution 1: GWT basics and past 1

Solution 2: JavaScript Integration 53

Solution three: customized Widget Implementation 71

Solution four: Viewports and Maps 103

Solution five: entry to on-line internet companies 133

Solution 6: Drag and Drop 167

Solution 7: basic home windows 199

Solution eight: Flex Tables 237

Solution nine: dossier Uploads 283

Solution 10: Hibernate Integration 303

Solution eleven: Deployment to an exterior Server 325

Solution 12: GWT and Legacy Code 343

Index 371



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Additional info for Google Web Toolkit Solutions: More Cool & Useful Stuff

Example text

9. private void loadLoginView() { 10. 11. final Button button = new Button(“Login”); 12. 13. 14. addClickListener(new ClickListener() { public void onClick(Widget sender) { 15. 16. loadWelcomeView(); } Solution 1: GWT Fundamentals and Beyond 17. 25 }); 18. 19. addClickListener(new ClickListener() { 20. public void onClick(Widget sender) { 21. alert(“New page loaded”); 22. } 23. }); 24. 25. } 26. 27. private void loadWelcomeView() { 28. welcomeMsg()); 29. addStyleName(“welcomeMsg”); 30. 31. clear(); 32.

Public class LoginStart implements EntryPoint { 12. public void onModuleLoad() { 13. final Label loginPrompt = new Label(“Please Log In”); 14. final Grid grid = new Grid(3, 2); 15. final Label namePrompt = new Label(“Name”); 16. final TextBox nameTextbox = new TextBox(); 17. final Label passwordPrompt = new Label(“Password”); 18. final PasswordTextBox passwordTextbox = 19. new PasswordTextBox(); 20. final Button button = new Button(“Login”); 21. 22. setWidget(0, 0, namePrompt); 23. setWidget(0, 1, nameTextbox); 24.

23. }); 24. 25. } 26. 27. private void loadWelcomeView() { 28. welcomeMsg()); 29. addStyleName(“welcomeMsg”); 30. 31. clear(); 32. add(welcomeMsg); 33. } In the preceding code, we left the Login button’s original click listener intact and added another click listener that calls loadWelcomeView(). We left the original click listener to illustrate that you can attach multiple listeners of the same type to a single widget. When you attach multiple listeners to a single widget, GWT calls those listeners in the order you added them to the widget.

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