1919import com .google .gwt .core .client .GWT ;
2020import com .google .gwt .event .dom .client .KeyUpEvent ;
2121import com .google .gwt .event .dom .client .KeyUpHandler ;
22+ import com .google .gwt .event .dom .client .ClickEvent ;
23+ import com .google .gwt .event .dom .client .ClickHandler ;
24+ import com .google .gwt .user .client .Window ;
2225import com .google .gwt .user .client .rpc .AsyncCallback ;
26+ import com .google .gwt .user .client .ui .Button ;
27+ import com .google .gwt .user .client .ui .FlexTable ;
28+ import com .google .gwt .user .client .ui .HorizontalPanel ;
2329import com .google .gwt .user .client .ui .Label ;
2430import com .google .gwt .user .client .ui .RootPanel ;
2531import com .google .gwt .user .client .ui .TextBox ;
32+ import com .hellogwt .shared .domain .Greeting ;
33+ import java .util .List ;
2634
2735/**
2836 * @author Alex Tretyakov
2937 */
3038public class HelloGWT implements EntryPoint {
39+
3140 private GreetingServiceAsync greetingService = GWT .create (GreetingService .class );
41+
42+ private HorizontalPanel greetingPanel = new HorizontalPanel ();
3243 private TextBox nameTextBox = new TextBox ();
3344 private Label greetingLabel = new Label ("Hello, GWT!" );
3445
46+ private HorizontalPanel authorPanel = new HorizontalPanel ();
47+ private HorizontalPanel textPanel = new HorizontalPanel ();
48+ private HorizontalPanel editPanel = new HorizontalPanel ();
49+
50+ private Label authorLabel = new Label ("Author:" );
51+ private Label textLabel = new Label ("Text:" );
52+ private TextBox authorTextBox = new TextBox ();
53+ private TextBox textTextBox = new TextBox ();
54+
55+ private Button addButton = new Button ("Add" );
56+ private Button updateButton = new Button ("Update" );
57+ private Button deleteButton = new Button ("Delete" );
58+
59+ private FlexTable greetingsFlexTable = new FlexTable ();
60+
3561 /**
3662 * Use our service GreetingService in application.
3763 *
@@ -40,23 +66,150 @@ public class HelloGWT implements EntryPoint {
4066 * Otherwise label text will tell us about error.
4167 */
4268 public void onModuleLoad () {
43- RootPanel .get ().add (nameTextBox );
44- RootPanel .get ().add (greetingLabel );
69+ initWidgets ();
70+ initHandlers ();
71+
72+ refreshGreetingsTable ();
73+ }
74+
75+ private void initWidgets () {
76+ // label
77+ greetingPanel .add (nameTextBox );
78+ greetingPanel .add (greetingLabel );
79+ RootPanel .get ().add (greetingPanel );
80+
81+ // table
82+ authorLabel .setWidth ("50" );
83+ authorTextBox .setWidth ("100" );
84+ authorPanel .add (authorLabel );
85+ authorPanel .add (authorTextBox );
86+
87+ textLabel .setWidth ("50" );
88+ textTextBox .setWidth ("100" );
89+ textPanel .add (textLabel );
90+ textPanel .add (textTextBox );
91+
92+ addButton .setWidth ("50" );
93+ updateButton .setWidth ("50" );
94+ deleteButton .setWidth ("50" );
95+ editPanel .add (addButton );
96+ editPanel .add (updateButton );
97+ editPanel .add (deleteButton );
4598
46- final AsyncCallback <String > callback = new AsyncCallback <String >() {
99+ RootPanel .get ().add (authorPanel );
100+ RootPanel .get ().add (textPanel );
101+ RootPanel .get ().add (editPanel );
102+ RootPanel .get ().add (greetingsFlexTable );
103+ }
104+
105+ private void initHandlers () {
106+ // label
107+ final AsyncCallback <String > textbox_callback = new AsyncCallback <String >() {
108+ @ Override
47109 public void onFailure (Throwable caught ) {
48110 greetingLabel .setText ("ERROR!" );
49111 }
50112
113+ @ Override
51114 public void onSuccess (String result ) {
52115 greetingLabel .setText (result );
53116 }
54117 };
55118
56119 nameTextBox .addKeyUpHandler (new KeyUpHandler () {
120+ @ Override
57121 public void onKeyUp (KeyUpEvent keyUpEvent ) {
58- greetingService .greet (nameTextBox .getText (), callback );
122+ greetingService .greet (nameTextBox .getText (), textbox_callback );
59123 }
60124 });
125+
126+ // table
127+ final AsyncCallback <Void > btn_callback = new AsyncCallback <Void >() {
128+ @ Override
129+ public void onFailure (Throwable caught ) {
130+ Window .alert ("ERROR: Cannot edit greetings!" );
131+ }
132+
133+ @ Override
134+ public void onSuccess (Void result ) {
135+ refreshGreetingsTable ();
136+ }
137+ };
138+
139+ addButton .addClickHandler (new ClickHandler () {
140+ @ Override
141+ public void onClick (ClickEvent clickEvent ) {
142+ if (!authorTextBox .getText ().isEmpty ()
143+ && !textTextBox .getText ().isEmpty ()) {
144+ greetingService .getGreeting (textTextBox .getText (),
145+ new AsyncCallback <Greeting >() {
146+ @ Override
147+ public void onFailure (Throwable caught ) {
148+ Window .alert ("ERROR: Cannot find greeting!" );
149+ }
150+
151+ @ Override
152+ public void onSuccess (Greeting result ) {
153+ if (result == null ) {
154+ greetingService .addGreeting (authorTextBox .getText (),
155+ textTextBox .getText (), btn_callback );
156+ } else {
157+ Window .alert ("Greeting already exists!" );
158+ }
159+ }
160+ });
161+ } else {
162+ Window .alert ("\" Author\" and \" Text\" fields cannot be empty!" );
163+ }
164+ }
165+ });
166+
167+ updateButton .addClickHandler (new ClickHandler () {
168+ @ Override
169+ public void onClick (ClickEvent event ) {
170+ if (!authorTextBox .getText ().isEmpty ()
171+ && !textTextBox .getText ().isEmpty ()) {
172+ greetingService .updateGreeting (authorTextBox .getText (),
173+ textTextBox .getText (), btn_callback );
174+ } else {
175+ Window .alert ("\" Author\" and \" Text\" fields cannot be empty!" );
176+ }
177+ }
178+ });
179+
180+ deleteButton .addClickHandler (new ClickHandler () {
181+ @ Override
182+ public void onClick (ClickEvent event ) {
183+ greetingService .deleteGreeting (textTextBox .getText (), btn_callback );
184+ }
185+ });
186+ }
187+
188+ private void refreshGreetingsTable () {
189+ greetingService .getGreetings (new AsyncCallback <List <Greeting >>() {
190+ @ Override
191+ public void onFailure (Throwable throwable ) {
192+ Window .alert ("ERROR: Cannot load greetings!" );
193+ }
194+
195+ @ Override
196+ public void onSuccess (List <Greeting > greetings ) {
197+ fillGreetingsTable (greetings );
198+ }
199+ });
200+ }
201+
202+ private void fillGreetingsTable (List <Greeting > greetings ) {
203+ greetingsFlexTable .removeAllRows ();
204+
205+ greetingsFlexTable .setText (0 , 0 , "Author" );
206+ greetingsFlexTable .setText (0 , 1 , "Text" );
207+
208+ for (Greeting greeting : greetings ) {
209+ int row = greetingsFlexTable .getRowCount ();
210+
211+ greetingsFlexTable .setText (row , 0 , greeting .getAuthor ());
212+ greetingsFlexTable .setText (row , 1 , greeting .getText ());
213+ }
61214 }
62215}
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