GWT: Refactor TranslateApp to make the suggestion panel and the settings panel separate classes. This makes it possible to reuse them in mosg and fridge.

src/server/gwt/src/se/chalmers/cs/gf/gwt/client/SettingsPanel.java

@@ -0,0 +1,149 @@
+package se.chalmers.cs.gf.gwt.client;
+
+import java.util.LinkedList;
+import java.util.List;
+
+import com.google.gwt.user.client.ui.ChangeListener;
+import com.google.gwt.user.client.ui.Composite;
+import com.google.gwt.user.client.ui.HorizontalPanel;
+import com.google.gwt.user.client.ui.Label;
+import com.google.gwt.user.client.ui.Widget;
+
+public class SettingsPanel extends Composite {
+
+	private PGF pgf;
+	private PGF.Grammar grammar;
+
+	private GrammarBox grammarBox;
+	private InputLanguageBox fromLangBox;
+	private OutputLanguageBox toLangBox;
+
+	private List<SettingsListener> listeners = new LinkedList<SettingsListener>();
+
+	public SettingsPanel (PGF pgf) {
+		this.pgf = pgf;
+
+		grammarBox = new GrammarBox();
+		grammarBox.addChangeListener(new ChangeListener() {
+			public void onChange(Widget sender) {
+				updateSelectedGrammar();
+			}
+		});
+
+		ChangeListener languageChangeListener = new ChangeListener() {
+			public void onChange(Widget sender) {
+				updateSelectedLanguages();
+			}
+		};
+
+		fromLangBox = new InputLanguageBox();
+		fromLangBox.addChangeListener(languageChangeListener);
+
+		toLangBox = new OutputLanguageBox();
+		toLangBox.addChangeListener(languageChangeListener);
+
+		HorizontalPanel settingsPanel = new HorizontalPanel();
+		settingsPanel.setVerticalAlignment(HorizontalPanel.ALIGN_MIDDLE);
+		settingsPanel.add(new Label("Grammar:"));
+		settingsPanel.add(grammarBox);
+		settingsPanel.add(new Label("From:"));
+		settingsPanel.add(fromLangBox);
+		settingsPanel.add(new Label("To:"));
+		settingsPanel.add(toLangBox);
+
+		initWidget(settingsPanel);
+		setStylePrimaryName("my-SettingsPanel");
+	}
+
+	public interface SettingsListener {
+		public void grammarChanged(String pgfName);
+		public void languagesChanged(List<String> inputLangs, List<String> outputLangs);
+		public void settingsError(String msg, Throwable e);
+	}
+
+	public void addSettingsListener(SettingsListener listener) {
+		listeners.add(listener);
+	}
+
+	void fireGrammarChanged() {
+		for (SettingsListener listener : listeners) {
+			listener.grammarChanged(getGrammarName());
+		}
+	}
+
+	void fireLanguagesChanged() {
+		for (SettingsListener listener : listeners) {
+			listener.languagesChanged(getInputLanguages(), getOutputLanguages());
+		}
+	}
+
+	void fireSettingsError(String msg, Throwable e) {
+		for (SettingsListener listener : listeners) {
+			listener.settingsError(msg, e);
+		}
+	}
+
+	//
+	// Grammars
+	//
+
+	public void updateAvailableGrammars() {
+		pgf.listGrammars(new PGF.GrammarNamesCallback() {
+			public void onResult(PGF.GrammarNames grammarNames) {
+				grammarBox.setGrammarNames(grammarNames);
+				// setGrammarNames() picks the first grammar automatically
+				updateSelectedGrammar();
+			}
+
+			public void onError (Throwable e) {
+				fireSettingsError("Error getting grammar list", e);
+			}
+		});
+	}
+
+	private void updateSelectedGrammar() {
+		fireGrammarChanged();
+		updateAvailableLanguages();
+	}
+
+	public PGF.Grammar getGrammar() {
+		return grammar;
+	}
+
+	public String getGrammarName() {
+		return grammarBox.getSelectedGrammar();
+	}
+
+
+	//
+	// Languages
+	//
+
+	public List<String> getInputLanguages() {
+		return fromLangBox.getSelectedValues();
+	}
+
+	public List<String> getOutputLanguages() {
+		return toLangBox.getSelectedValues();
+	}
+
+	private void updateAvailableLanguages() {
+		pgf.grammar(getGrammarName(), new PGF.GrammarCallback() {
+			public void onResult(PGF.Grammar grammar) {
+				SettingsPanel.this.grammar = grammar;
+				fromLangBox.setGrammar(grammar);
+				toLangBox.setGrammar(grammar);
+				updateSelectedLanguages();
+			}
+
+			public void onError (Throwable e) {
+				fireSettingsError("Error getting language information", e);
+			}
+		});	
+	}
+
+	private void updateSelectedLanguages() {
+		fireLanguagesChanged();
+	}
+
+}

src/server/gwt/src/se/chalmers/cs/gf/gwt/client/SuggestPanel.java

@@ -0,0 +1,119 @@
+package se.chalmers.cs.gf.gwt.client;
+
+import java.util.LinkedList;
+import java.util.List;
+
+import com.google.gwt.core.client.GWT;
+import com.google.gwt.user.client.ui.Button;
+import com.google.gwt.user.client.ui.ClickListener;
+import com.google.gwt.user.client.ui.Composite;
+import com.google.gwt.user.client.ui.DockPanel;
+import com.google.gwt.user.client.ui.HasVerticalAlignment;
+import com.google.gwt.user.client.ui.KeyboardListenerAdapter;
+import com.google.gwt.user.client.ui.SuggestBox;
+import com.google.gwt.user.client.ui.Widget;
+
+public class SuggestPanel extends Composite {
+
+	private CompletionOracle oracle;
+	private SuggestBox suggest;
+	private Button submitButton;
+
+	private List<SubmitListener> listeners = new LinkedList<SubmitListener>();
+
+	public SuggestPanel (PGF pgf) {
+
+		oracle = new CompletionOracle(pgf, new CompletionOracle.ErrorHandler() {
+			public void onError(Throwable e) {
+				GWT.log("Completion failed", e);
+			}
+		});
+
+		suggest = new SuggestBox(oracle);
+		suggest.setLimit(10);
+		suggest.addKeyboardListener(new KeyboardListenerAdapter() {
+			public void onKeyUp (Widget sender, char keyCode, int modifiers) {
+				if (keyCode == KEY_ENTER) {
+					submit();
+				}
+			}
+		});
+
+		submitButton = new Button("Submit");
+		submitButton.setEnabled(false);
+		submitButton.addClickListener(new ClickListener() {
+			public void onClick(Widget sender) {
+				submit();
+			}
+		});
+
+		DockPanel mainPanel = new DockPanel();
+		mainPanel.setVerticalAlignment(HasVerticalAlignment.ALIGN_MIDDLE);
+		mainPanel.add(suggest, DockPanel.CENTER);
+		mainPanel.add(submitButton, DockPanel.EAST);
+
+		initWidget(mainPanel);
+		setStylePrimaryName("my-SuggestPanel");
+
+	}
+
+	public int getLimit() {
+		return suggest.getLimit();
+	}
+
+	public String getText() {
+		return suggest.getText();
+	}
+
+	public String getTitle() {
+		return suggest.getTitle();
+	}
+
+	public void onLoad() {
+		suggest.setFocus(true);
+	}
+
+	public void setButtonText (String text) {
+		submitButton.setText(text);
+	}
+
+	public void setEnabled(boolean enabled) {
+		submitButton.setEnabled(enabled);
+	}
+
+	public void setGrammarName(String pgfName) {
+		oracle.setGrammarName(pgfName);
+	}
+
+	public void setInputLangs(List<String> inputLangs) {
+		oracle.setInputLangs(inputLangs);
+	}
+
+	public void setLimit(int limit) {
+		suggest.setLimit(limit);
+	}
+
+	public void setText (String text) {
+		suggest.setText(text);
+	}
+
+	public void setTitle(String title) {
+		suggest.setTitle(title);
+	}
+
+	public void addSubmitListener(SubmitListener listener) {
+		listeners.add(listener);
+	}
+
+	public void submit() {
+		String text = getText();
+		for (SubmitListener listener : listeners) {
+			listener.onSubmit(text);
+		}
+	}
+
+	public interface SubmitListener {
+		public void onSubmit(String text);
+	}
+
+}

src/server/gwt/src/se/chalmers/cs/gf/gwt/client/TranslateApp.java

@@ -1,16 +1,11 @@
 package se.chalmers.cs.gf.gwt.client;
 
+import java.util.List;
+
 import com.google.gwt.core.client.EntryPoint;
-import com.google.gwt.user.client.ui.Button;
-import com.google.gwt.user.client.ui.ChangeListener;
-import com.google.gwt.user.client.ui.ClickListener;
-import com.google.gwt.user.client.ui.HorizontalPanel;
-import com.google.gwt.user.client.ui.KeyboardListenerAdapter;
 import com.google.gwt.user.client.ui.Label;
 import com.google.gwt.user.client.ui.RootPanel;
-import com.google.gwt.user.client.ui.SuggestBox;
 import com.google.gwt.user.client.ui.VerticalPanel;
-import com.google.gwt.user.client.ui.Widget;
 
 
 public class TranslateApp implements EntryPoint {
@@ -19,13 +14,8 @@ public class TranslateApp implements EntryPoint {
 
 	private PGF pgf;
 
-	private CompletionOracle oracle;
-	private SuggestBox suggest;
-	private PGF.Grammar grammar;
-	private GrammarBox grammarBox;
-	private InputLanguageBox fromLangBox;
-	private OutputLanguageBox toLangBox;
-	private Button translateButton;
+	private SuggestPanel suggestPanel;
+	private SettingsPanel settingsPanel;
 	private VerticalPanel outputPanel;
 	private StatusPopup statusPopup;
 
@@ -36,13 +26,16 @@ public class TranslateApp implements EntryPoint {
 	private void translate() {
 		outputPanel.clear();
 		setStatus("Translating...");
-		pgf.translate(getGrammarName(), suggest.getText(), fromLangBox.getSelectedValues(), null, 
-				toLangBox.getSelectedValues(), new PGF.TranslateCallback() {
+		pgf.translate(settingsPanel.getGrammarName(), 
+					  suggestPanel.getText(), 
+					  settingsPanel.getInputLanguages(), null, 
+				      settingsPanel.getOutputLanguages(), 
+				      new PGF.TranslateCallback() {
 			public void onResult (PGF.Translations translations) {
 				for (PGF.Translation t : translations.iterable()) {
 					Label l = new Label(t.getText());
 					l.addStyleName("my-translation");
-					PGF.Language lang = grammar.getLanguage(t.getTo());
+					PGF.Language lang = settingsPanel.getGrammar().getLanguage(t.getTo());
 					if (lang != null) {
 						l.getElement().setLang(lang.getLanguageCode());
 					}
@@ -71,59 +64,19 @@ public class TranslateApp implements EntryPoint {
 	private void clearStatus() {
 		statusPopup.clearStatus();
 	}
-
+	
 	//
-	// Grammars
+	// Grammars and languages
 	//
 
-	private String getGrammarName() {
-		return grammarBox.getSelectedGrammar();
-	}
-
-	private void updateAvailableGrammars() {
-		pgf.listGrammars(new PGF.GrammarNamesCallback() {
-			public void onResult(PGF.GrammarNames grammarNames) {
-				grammarBox.setGrammarNames(grammarNames);
-				// setGrammarNames() picks the first grammar automatically
-				updateSelectedGrammar();
-			}
-
-			public void onError (Throwable e) {
-				showError("Error getting grammar list", e);
-			}
-		});
-	}
-
 	private void updateSelectedGrammar() {
-		oracle.setGrammarName(getGrammarName());
-		updateAvailableLanguages();
-	}
-
-	//
-	// Languages
-	//
-
-	private void updateAvailableLanguages() {
-		pgf.grammar(getGrammarName(), new PGF.GrammarCallback() {
-			public void onResult(PGF.Grammar grammar) {
-				TranslateApp.this.grammar = grammar;
-
-				fromLangBox.setGrammar(grammar);
-				toLangBox.setGrammar(grammar);
-
-				updateSelectedLanguages();
-				clearStatus();
-				translateButton.setEnabled(true);
-			}
-
-			public void onError (Throwable e) {
-				showError("Error getting language information", e);
-			}
-		});	
+		suggestPanel.setGrammarName(settingsPanel.getGrammarName());
 	}
 
 	private void updateSelectedLanguages() {
-		oracle.setInputLangs(fromLangBox.getSelectedValues());
+		suggestPanel.setInputLangs(settingsPanel.getInputLanguages());
+		suggestPanel.setEnabled(true);
+		clearStatus();
 		translate();
 	}
 
@@ -136,58 +89,26 @@ public class TranslateApp implements EntryPoint {
 		statusPopup = new StatusPopup();
 		setStatus("Loading...");
 
-		oracle = new CompletionOracle(pgf, new CompletionOracle.ErrorHandler() {
-			public void onError(Throwable e) {
-				showError("Completion failed", e);
-			}
-		});
-
-		suggest = new SuggestBox(oracle);
-		suggest.addKeyboardListener(new KeyboardListenerAdapter() {
-			public void onKeyUp (Widget sender, char keyCode, int modifiers) {
-				if (keyCode == KEY_ENTER) {
-					translate();
-				}
-			}
-		});
-
-		grammarBox = new GrammarBox();
-		grammarBox.addChangeListener(new ChangeListener() {
-			public void onChange(Widget sender) {
-				updateSelectedGrammar();
-			}
-		});
-
-		ChangeListener languageChangeListener = new ChangeListener() {
-			public void onChange(Widget sender) {
-				updateSelectedLanguages();
-			}
-		};
-
-		fromLangBox = new InputLanguageBox();
-		fromLangBox.addChangeListener(languageChangeListener);
-
-		toLangBox = new OutputLanguageBox();
-		toLangBox.addChangeListener(languageChangeListener);
-
-		translateButton = new Button("Translate");
-		translateButton.setEnabled(false);
-		translateButton.addClickListener(new ClickListener() {
-			public void onClick(Widget sender) {
+		suggestPanel = new SuggestPanel(pgf);
+		suggestPanel.setButtonText("Translate");
+		suggestPanel.addSubmitListener(new SuggestPanel.SubmitListener() {
+			public void onSubmit(String text) {
 				translate();
 			}
 		});
 
-		HorizontalPanel settingsPanel = new HorizontalPanel();
-		settingsPanel.addStyleName("my-settingsPanel");
-		settingsPanel.setVerticalAlignment(HorizontalPanel.ALIGN_MIDDLE);
-		settingsPanel.add(new Label("Grammar:"));
-		settingsPanel.add(grammarBox);
-		settingsPanel.add(new Label("From:"));
-		settingsPanel.add(fromLangBox);
-		settingsPanel.add(new Label("To:"));
-		settingsPanel.add(toLangBox);
-		settingsPanel.add(translateButton);
+		settingsPanel = new SettingsPanel(pgf);
+		settingsPanel.addSettingsListener(new SettingsPanel.SettingsListener() {
+			public void grammarChanged(String pgfName) {
+				updateSelectedGrammar();
+			}
+			public void languagesChanged(List<String> inputLangs, List<String> outputLangs) {
+				updateSelectedLanguages();
+			}
+			public void settingsError(String msg, Throwable e) {
+				showError(msg,e);
+			}
+		});
 
 		outputPanel = new VerticalPanel();
 		outputPanel.addStyleName("my-translations");
@@ -195,7 +116,7 @@ public class TranslateApp implements EntryPoint {
 		VerticalPanel vPanel = new VerticalPanel();
 		vPanel.setWidth("100%");
 		vPanel.setHorizontalAlignment(VerticalPanel.ALIGN_CENTER);
-		vPanel.add(suggest);
+		vPanel.add(suggestPanel);
 		vPanel.add(settingsPanel);
 		vPanel.add(outputPanel);
 
@@ -210,7 +131,7 @@ public class TranslateApp implements EntryPoint {
 	public void onModuleLoad() {
 		pgf = new PGF(pgfBaseURL);
 		createTranslationUI();
-		updateAvailableGrammars();
+		settingsPanel.updateAvailableGrammars();
 	}
 
 }

src/server/gwt/src/se/chalmers/cs/gf/gwt/public/Translate.css

@@ -1,12 +1,22 @@
 /** Add css rules here for your application. */
 
-.gwt-SuggestBox {
-    width: 70%;
-    font-size: 150%;
+.my-SuggestPanel {
     margin: 1em 0 0.5em 0;
 }
 
-.my-settingsPanel * {
+.my-SuggestPanel .gwt-SuggestBox {
+    width: 400px;
+    font-size: 150%;
+    margin: 0;
+}
+
+.my-SuggestPanel .gwt-Button {
+    font-size: 150%;
+    margin: 0;
+    margin-left: 2px;
+}
+
+.my-SettingsPanel * {
     margin: 0 0.4em;
 }