Java ListBox.addChangeHandler方法代码示例

import com.google.gwt.user.client.ui.ListBox; //导入方法依赖的package包/类
/**
 * Initializes the list box that allows to select styles
 * @param listBox the list box to initialize
 * @param dataToName the mapping from the style ID to the human readable name of the style
 * @param dataToStyleName the mapping from the style ID to the CSS style name
 * @param defaultValue the default style ID that should be set as selected
 */
public void initializeListBox( final ListBox listBox, final Map<Integer, String> dataToName,
							   final Map<Integer, String> dataToStyleName, final int defaultValue) {
	//Initialize the list box with data
	Iterator< Entry<Integer,String> > entrySetIter = dataToName.entrySet().iterator();
	while( entrySetIter.hasNext() ) {
		Entry<Integer, String> entry = entrySetIter.next();
		listBox.addItem( entry.getValue(), dataToStyleName.get( entry.getKey() ) );
	}
	listBox.setVisibleItemCount( 1 );
	
	//Set the default value as being selected
	setListBoxStyleID( listBox, defaultValue, dataToStyleName );
	
	//Add the change listener
	listBox.addChangeHandler(new ChangeHandler() {
		public void onChange(ChangeEvent e) {
			//Update the sample view
			updateSampleViewStyles();
		}
	});
}
 

import com.google.gwt.user.client.ui.ListBox; //导入方法依赖的package包/类
/**
 * Creates a drop down menu for selecting Template repositories.
 * @return the drop down menu of repository Urls.
 */
private ListBox makeTemplatesMenu() {
  final ListBox templatesMenu = new ListBox();
  templatesMenu.addItem(MESSAGES.templateUploadNewUrlCaption());
  templatesMenu.addItem(MIT_TEMPLATES);

  for (int k = 0; k < dynamicTemplateUrls.size(); k++) { // Dynamically added Urls
    templatesMenu.addItem(dynamicTemplateUrls.get(k));
  }
  templatesMenu.setSelectedIndex(MIT_TEMPLATES_INDEX);
  templatesMenu.addChangeHandler(new ChangeHandler() {
      public void onChange(ChangeEvent event) {
        int selectedIndex = templatesMenu.getSelectedIndex();

        if (selectedIndex == 0) {
          templatesMenu.setSelectedIndex(lastSelectedIndex);
          usingExternalTemplate = true; // MIT templates at index 1
          removeButton.setVisible(false);
          new InputTemplateUrlWizard(instance).center();     // This will do a callback
        } else if (selectedIndex == 1) {
          removeButton.setVisible(false);          lastSelectedIndex = selectedIndex;
          usingExternalTemplate = false; // MIT templates at index 1
          templateHostUrl = "";
          retrieveSelectedTemplates(templatesMenu.getValue(selectedIndex));  // may do callback
        } else {
          removeButton.setVisible(true);         lastSelectedIndex = selectedIndex;
          usingExternalTemplate = true; // MIT templates at index 1
          templateHostUrl = templatesMenu.getValue(selectedIndex);
          retrieveSelectedTemplates(templatesMenu.getValue(selectedIndex));  // may do callback
        }
      }
    });
  templatesMenu.setVisibleItemCount(1);  // Turns menu into a drop-down list).
  return templatesMenu;
}
 

import com.google.gwt.user.client.ui.ListBox; //导入方法依赖的package包/类
public void onModuleLoad() {
    PublishSubject<String> query = PublishSubject.create();

    TextBox text = new TextBox(); RootPanel.get().add(text);
    text.addValueChangeHandler(e -> query.onNext(e.getValue()));

    Button search = new Button("search"); RootPanel.get().add(search);
    search.addClickHandler(e -> query.onNext(text.getValue()));

    ListBox url = new ListBox(); RootPanel.get().add(url);
    url.addItem(NOMINATIM_OPENSTREETMAP);
    url.addItem("http://localhost:8080/");
    url.addChangeHandler(e -> query.onNext(text.getValue()));

    FlowPanel results = new FlowPanel(); RootPanel.get().add(results);

    // remember last selected server
    Storage storage = Storage.getLocalStorageIfSupported();
    if (storage != null) {
        try {
            url.setSelectedIndex(Integer.valueOf(storage.getItem("nominatim.url")));
        } catch (Exception ignore) {}
        url.addChangeHandler(c -> storage.setItem("nominatim.url", Integer.toString(url.getSelectedIndex())));
    }

    // on each tick, re-configure root resource and fire new request
    query.switchMap(q -> {
        results.clear();
        if (q == null || q.isEmpty()) return Observable.empty();
        Nominatim nominatim = new Nominatim_RestServiceModel(() -> osm(url.getSelectedItemText()));
        return nominatim.search(q, "json").doOnNext(n -> results.add(new Label(
                "[" + (int) (n.importance * 10.) + "] " + n.display_name + " (" + n.lon + "," + n.lat + ")")));
    }).retry((cnt, err) -> {
        GWT.log("request error: " + err, err); return true;
    }).subscribe();

     // fires initial search
    text.setValue("Málaga,España", true);
}
 

import com.google.gwt.user.client.ui.ListBox; //导入方法依赖的package包/类
@Override
public void buildPanel() {
    csVPanel = new ViewerPanel();
    addLabel();

    ListBox labelsLBox = new ListBox();
    labelsLBox.addItem("Add label", "0");
    labelsLBox.addItem("Set font", "1");
    labelsLBox.addItem("Set properties", "2");
    labelsLBox.addItem("Offset label by distance", "3");
    labelsLBox.addItem("Fade label by distance", "4");
    labelsLBox.addChangeHandler(new ChangeHandler() {
        @Override
        public void onChange(ChangeEvent event) {
            ListBox source = (ListBox) event.getSource();
            reset();
            switch (source.getSelectedValue()) {
                case "0": addLabel(); break;
                case "1": setFont(); break;
                case "2": setProperties(); break;
                case "3": offsetByDistance(); break;
                case "4": fadeByDistance(); break;
                default: break;
            }
        }
    });

    AbsolutePanel aPanel = new AbsolutePanel();
    aPanel.add(csVPanel);
    aPanel.add(labelsLBox, 20, 20);

    contentPanel.add(new HTML("<p>Create Labels</p>"));
    contentPanel.add(aPanel);

    initWidget(contentPanel);
}
 

import com.google.gwt.user.client.ui.ListBox; //导入方法依赖的package包/类
private void initComp() {

            buttonImage = new Image(REMOVE_BUTTON_IMAGE);
            buttonImage.getElement().getStyle().setVerticalAlign(VerticalAlign.MIDDLE);

            removeButton = new Anchor();
            removeButton.addClickHandler(this);
            removeButton.setPixelSize(12, 12);
            removeButton.getElement().appendChild(buttonImage.getElement());

            fieldsList = new ListBox();
            fieldsList.addChangeHandler(this);
            fieldsList.setPixelSize(100, 20);
            for (Field field : Field.values()) {
                fieldsList.addItem(field.getName());
            }

            actionList = new ListBox();
            actionList.setPixelSize(140, 20);

            textBox = new TextBox();
            textBox.setPixelSize(140, 12);

            priorityList = new ListBox();
            priorityList.setPixelSize(140, 20);
            for (JobPriority priority : JobPriority.values()) {
                priorityList.addItem(priority.name());
            }

            stateList = new ListBox();
            stateList.setPixelSize(140, 20);
            for (JobStatus status : JobStatus.values()) {
                stateList.addItem(status.name());
            }

            valuePanel = new SimplePanel();
            valuePanel.setPixelSize(150, 25);

            setActionsAccordingToSelectedField();
        }
 

import com.google.gwt.user.client.ui.ListBox; //导入方法依赖的package包/类
protected void setRuneLabel(final Anchor label, final ListBox skills,
		final ListBox runes) {
	label.setTarget("_blank");
	runes.addChangeHandler(new ChangeHandler() {

		@Override
		public void onChange(ChangeEvent event) {

			if (!disableListeners)
				updateRuneLabel(label, skills, runes);

		}
	});
	updateRuneLabel(label, skills, runes);
}
 

import com.google.gwt.user.client.ui.ListBox; //导入方法依赖的package包/类
protected void setSkillLabel(final Anchor label, final ListBox skills) {
	label.setTarget("_blank");
	skills.addChangeHandler(new ChangeHandler() {

		@Override
		public void onChange(ChangeEvent event) {

			if (!disableListeners)
				updateSkillLabel(label, skills);

		}
	});
	updateSkillLabel(label, skills);
}
 

import com.google.gwt.user.client.ui.ListBox; //导入方法依赖的package包/类
@Override
public void buildPanel() {
    csVPanel = new ViewerPanel();
    addBillboard();

    ListBox billboardsLBox = new ListBox();
    billboardsLBox.addItem("Add billboard", "0");
    billboardsLBox.addItem("Set billboard properties at creation", "1");
    billboardsLBox.addItem("Change billboard properties", "2");
    billboardsLBox.addItem("Size billboard in meters", "3");
    billboardsLBox.addItem("Add multiple billboards", "4");
    billboardsLBox.addItem("Scale by viewer distance", "5");
    billboardsLBox.addItem("Fade by viewer distance", "6");
    billboardsLBox.addItem("Offset by viewer distance", "7");
    billboardsLBox.addItem("Add marker billboards", "8");
    billboardsLBox.addChangeHandler(new ChangeHandler() {
        @Override
        public void onChange(ChangeEvent changeEvent) {
            ListBox source = (ListBox)changeEvent.getSource();
            reset();
            switch (source.getSelectedValue()) {
                case "0": addBillboard(); break;
                case "1": setBillboardProperties(); break;
                case "2": changeBillboardProperties(); break;
                case "3": sizeBillboardInMeters(); break;
                case "4": addMultipleBillboards(); break;
                case "5": scaleByDistance(); break;
                case "6": fadeByDistance(); break;
                case "7": offsetByDistance(); break;
                case "8": addMarkerBillboards();
                default: break;
            }
        }
    });

    AbsolutePanel aPanel = new AbsolutePanel();
    aPanel.add(csVPanel);
    aPanel.add(billboardsLBox, 20, 20);

    contentPanel.add(new HTML("<p>Add billboard images and markers to the scene.</p>"));
    contentPanel.add(aPanel);

    initWidget(contentPanel);
}
 

import com.google.gwt.user.client.ui.ListBox; //导入方法依赖的package包/类
@Override
    public void buildPanel() {
        csVPanel = new ViewerPanel();
        createPrimitives(csVPanel.getViewer().scene());
        applyColorMaterial(rectangle);

        commonMaterialLBox = new ListBox();
        commonMaterialLBox.addChangeHandler(new MChangeHandler());
        commonMaterialLBox.addItem("Select", "0");
        commonMaterialLBox.addItem("Color", "1");
        commonMaterialLBox.addItem("Image", "2");

        proceduralTexturesLBox = new ListBox();
        proceduralTexturesLBox.addChangeHandler(new MChangeHandler());
        proceduralTexturesLBox.addItem("Select", "0");
        proceduralTexturesLBox.addItem("Checkerboard", "1");
        proceduralTexturesLBox.addItem("Dot", "2");
        proceduralTexturesLBox.addItem("Grid", "3");
        proceduralTexturesLBox.addItem("Stripe", "4");

        baseMaterialsLBox = new ListBox();
        baseMaterialsLBox.addChangeHandler(new MChangeHandler());
        baseMaterialsLBox.addItem("Select", "0");
        baseMaterialsLBox.addItem("Alpha Map", "1");
        baseMaterialsLBox.addItem("Bump Map", "2");
        baseMaterialsLBox.addItem("Diffuse", "3");
        baseMaterialsLBox.addItem("Emission Map", "4");
        baseMaterialsLBox.addItem("Normal Map", "5");
        baseMaterialsLBox.addItem("Specular Map", "6");

        miscMaterialsLBox = new ListBox();
        miscMaterialsLBox.addChangeHandler(new MChangeHandler());
        miscMaterialsLBox.addItem("Select", "0");
        miscMaterialsLBox.addItem("Rim Lighting", "1");
        miscMaterialsLBox.addItem("Water", "2");

        exampleCompositeMaterialsLBox = new ListBox();
        exampleCompositeMaterialsLBox.addChangeHandler(new MChangeHandler());
        exampleCompositeMaterialsLBox.addItem("Select", "0");
        exampleCompositeMaterialsLBox.addItem("Composite Example", "1");

        polylineMaterialsLBox = new ListBox();
        polylineMaterialsLBox.addChangeHandler(new MChangeHandler());
        polylineMaterialsLBox.addItem("Select", "0");
        polylineMaterialsLBox.addItem("Polyline Arrow", "1");
        polylineMaterialsLBox.addItem("Polyline Glow", "2");
        polylineMaterialsLBox.addItem("Polyline Outline", "3");

        FlexTable flexTable = new FlexTable();
        flexTable.setCellSpacing(1);
        flexTable.setCellPadding(1);
        flexTable.setHTML(1, 0, "<font color=\"white\">Common materials</font>");
        flexTable.setWidget(1, 1, commonMaterialLBox);
        flexTable.setHTML(2, 0, "<font color=\"white\">Procedural textures</font>");
        flexTable.setWidget(2, 1, proceduralTexturesLBox);
        flexTable.setHTML(3, 0, "<font color=\"white\">Base materials</font>");
        flexTable.setWidget(3, 1, baseMaterialsLBox);
        flexTable.setHTML(4, 0, "<font color=\"white\">Misc materials</font>");
        flexTable.setWidget(4, 1, miscMaterialsLBox);
        flexTable.setHTML(5, 0, "<font color=\"white\">Example composite materials</font>");
        flexTable.setWidget(5, 1, exampleCompositeMaterialsLBox);
        flexTable.setHTML(6, 0, "<font color=\"white\">Polyline materials</font>");
        flexTable.setWidget(6, 1, polylineMaterialsLBox);
//
        AbsolutePanel aPanel = new AbsolutePanel();
        aPanel.add(csVPanel);
        aPanel.add(flexTable, 20, 20);

        contentPanel.add(new HTML("<p>Browse Cesium's built in materials and define new ones using the Fabric schema.</p>"));
        contentPanel.add(aPanel);

        initWidget(contentPanel);
    }
 

import com.google.gwt.user.client.ui.ListBox; //导入方法依赖的package包/类
@Override
public void buildPanel() {
    ViewerOptions csViewerOptions = new ViewerOptions();
    csViewerOptions.infoBox = false;
    csViewerOptions.selectionIndicator = false;
    csViewerOptions.shadows = false;
    csVPanel = new ViewerPanel(csViewerOptions);

    ModelGraphicsOptions modelGraphicsOptions = new ModelGraphicsOptions();
    modelGraphicsOptions.uri = new ConstantProperty<>(GWT.getModuleBaseURL() + "SampleData/models/CesiumAir/Cesium_Air.glb");
    modelGraphicsOptions.minimumPixelSize = new ConstantProperty<>(128);
    modelGraphicsOptions.maximumScale = new ConstantProperty<>(20000);
    ModelGraphics modelGraphics = new ModelGraphics(modelGraphicsOptions);

    Cartesian3 position = Cartesian3.fromDegrees(-123.0744619, 44.0503706, 5000.0);
    double heading = Math.toRadians(135);
    double pitch = 0;
    double roll = 0;
    Quaternion orientation = Transforms.headingPitchRollQuaternion(position, new org.cesiumjs.cs.core.HeadingPitchRoll(heading, pitch, roll));
    EntityOptions entityOptions = new EntityOptions();
    entityOptions.name = GWT.getModuleBaseURL() + "SampleData/models/CesiumAir/Cesium_Air.glb";
    entityOptions.position = new ConstantPositionProperty(position);
    entityOptions.orientation = new ConstantProperty<>(orientation);
    entityOptions.model = modelGraphics;
    csVPanel.getViewer().trackedEntity = csVPanel.getViewer().entities().add(entityOptions);

    final ListBox modelsLBox = new ListBox();
    modelsLBox.addItem("Aircraft", "0");
    modelsLBox.addItem("Ground vehicle", "1");
    modelsLBox.addItem("Hot Air Balloon", "2");
    modelsLBox.addItem("Milk truck", "3");
    modelsLBox.addItem("Skinned character", "4");
    modelsLBox.addChangeHandler(new ChangeHandler() {
        @Override
        public void onChange(ChangeEvent changeEvent) {
            csVPanel.getViewer().entities().removeAll();
            switch (modelsLBox.getSelectedValue()) {
                case "0": createModel(GWT.getModuleBaseURL() + "SampleData/models/CesiumAir/Cesium_Air.glb", 5000.0); break;
                case "1": createModel(GWT.getModuleBaseURL() + "SampleData/models/CesiumGround/Cesium_Ground.glb", 0); break;
                case "2": createModel(GWT.getModuleBaseURL() + "SampleData/models/CesiumBalloon/CesiumBalloon.glb", 1000.0); break;
                case "3": createModel(GWT.getModuleBaseURL() + "SampleData/models/CesiumMilkTruck/CesiumMilkTruck-kmc.glb", 0); break;
                case "4": createModel(GWT.getModuleBaseURL() + "SampleData/models/CesiumMan/Cesium_Man.glb", 0); break;
                default: break;
            }
        }
    });

    AbsolutePanel aPanel = new AbsolutePanel();
    aPanel.add(csVPanel);
    aPanel.add(modelsLBox, 20, 20);

    contentPanel.add(new HTML("<p>Create 3D models using glTF.</p>"));
    contentPanel.add(aPanel);

    initWidget(contentPanel);
}
 

import com.google.gwt.user.client.ui.ListBox; //导入方法依赖的package包/类
@Override
public void buildPanel() {
    csVPanel = new ViewerPanel();

    ListBox kmlLBox = new ListBox();
    kmlLBox.addItem("KML - Global Science Facilities", GWT.getModuleBaseURL() + "SampleData/kml/facilities/facilities.kml");
    kmlLBox.addItem("KMZ with embedded data - GDP per capita", GWT.getModuleBaseURL() + "SampleData/kml/gdpPerCapita2008.kmz");
    kmlLBox.addItem("gx KML extensions - Bike Ride", GWT.getModuleBaseURL() + "SampleData/kml/bikeRide.kml");
    kmlLBox.addChangeHandler(new ChangeHandler() {
        @Override
        public void onChange(ChangeEvent changeEvent) {
            reset();
            ListBox source = (ListBox) changeEvent.getSource();
            final Viewer viewer = csVPanel.getViewer();
            org.cesiumjs.cs.scene.Camera camera = viewer.camera;
            CanvasElement canvas = viewer.canvas();
            camera.flyHome(0);
            KmlDataSourceOptions kmlDataSourceOptions = new KmlDataSourceOptions();//camera, canvas);
            kmlDataSourceOptions.canvas = canvas;
            kmlDataSourceOptions.camera = camera;
            if (!source.getSelectedValue().contains("bikeRide")) {
                csVPanel.getViewer().dataSources().add(KmlDataSource.load(source.getSelectedValue(), kmlDataSourceOptions));
            } else {
                csVPanel.getViewer().dataSources().add(KmlDataSource.load(source.getSelectedValue(), kmlDataSourceOptions)).then(new Fulfill<KmlDataSource>() {
                    @Override
                    public void onFulfilled(KmlDataSource dataSource) {
                        viewer.clock().shouldAnimate = false;
                        final Entity rider = dataSource.entities.getById("tour");
                        viewer.flyTo(rider).then(new Fulfill<Boolean>() {
                            @Override
                            public void onFulfilled(Boolean value) {
                                viewer.trackedEntity = rider;
                                viewer.selectedEntity = viewer.trackedEntity;
                                viewer.clock().multiplier = 30;
                                viewer.clock().shouldAnimate = true;
                            }
                        });
                    }
                });
            }
        }
    });

    AbsolutePanel aPanel = new AbsolutePanel();
    aPanel.add(csVPanel);
    aPanel.add(kmlLBox, 20, 20);

    contentPanel.add(new HTML("<p>A simple KML example.</p>"));
    contentPanel.add(aPanel);

    initWidget(contentPanel);
}
 

import com.google.gwt.user.client.ui.ListBox; //导入方法依赖的package包/类
@Override
public void buildPanel() {
    csVPanel = new ViewerPanel();

    _eventsLbl = new Label("View Changed");
    _eventsLbl.getElement().getStyle().setColor("red");
    _eventsLbl.setVisible(false);

    _changesLbl = new Label();
    _changesLbl.getElement().getStyle().setColor("red");
    _changesLbl.setVisible(false);

    ListBox lBox = new ListBox();
    lBox.addItem("Camera Options", "0");
    lBox.addItem("Fly in a city", "1");
    lBox.addItem("Fly to San Diego", "2");
    lBox.addItem("Fly to Location with heading, pitch and roll", "3");
    lBox.addItem("Fly to My Location", "4");
    lBox.addItem("Fly to Rectangle", "5");
    lBox.addItem("View a Rectangle", "6");
    lBox.addItem("Set camera reference frame", "7");
    lBox.addItem("Set camera with heading, pitch, and roll", "8");
    lBox.addItem("View in ICRF", "9");
    lBox.addItem("Move events", "10");
    lBox.addItem("Camera changed event", "11");
    lBox.addChangeHandler(new ChangeHandler() {
        @Override
        public void onChange(ChangeEvent changeEvent) {
            reset();
            ListBox source = (ListBox) changeEvent.getSource();
            switch (source.getSelectedValue()) {
                case "1": flyInACity(); break;
                case "2": flyToSanDiego(); break;
                case "3": flyToHeadingPitchRoll(); break;
                case "5": flyToRectangle(); break;
                case "6": viewRectangle(); break;
                case "7": setReferenceFrame(); break;
                case "8": setHeadingPitchRoll(); break;
                case "9": viewInICRF(); break;
                case "10": cameraEvents(); break;
                case "11": cameraChanges(); break;
                default: break;
            }
        }
    });

    AbsolutePanel aPanel = new AbsolutePanel();
    aPanel.add(csVPanel);
    aPanel.add(lBox, 20, 20);

    contentPanel.add(new HTML("<p>Fly to a specified location or view a geographic rectangle.</p>"));
    contentPanel.add(_eventsLbl);
    contentPanel.add(_changesLbl);
    contentPanel.add(aPanel);

    initWidget(contentPanel);
}
 

import com.google.gwt.user.client.ui.ListBox; //导入方法依赖的package包/类
@Override
protected void populateDialog() {
	addNewGrid( 2, 3, false, "", false);
	
	//Add the radio-html widget to the panel
	this.addToGrid(this.getCurrentGridIndex(), FIRST_COLUMN_INDEX, 3, radioHTML, false, false);
	
	//Construct and add the listbox
	HorizontalPanel panel = new HorizontalPanel();
	panel.setVerticalAlignment( HasVerticalAlignment.ALIGN_MIDDLE );
	panel.setHorizontalAlignment( HasHorizontalAlignment.ALIGN_LEFT );
	panel.setSize("100%", "100%");
	Label chooseLabel = new Label( titlesI18N.chooseRadioText() );
	chooseLabel.setStyleName( CommonResourcesContainer.CONST_FIELD_VALUE_DEFAULT_IMP_STYLE_NAME );
	final ListBox chooseRadioListBox = new ListBox();
	for( String name : nameToUrl.keySet() ) {
		chooseRadioListBox.addItem( name );
	}
	chooseRadioListBox.addChangeHandler( new ChangeHandler() {
		@Override
		public void onChange(ChangeEvent event) {
			setRadioStation( chooseRadioListBox.getItemText( chooseRadioListBox.getSelectedIndex() ) );
		}
	});
	final String defaultRadioStation = chooseRadioListBox.getItemText(0);
	panel.add( chooseLabel );
	panel.add( new HTML(" "));
	panel.add( chooseRadioListBox );
	this.addToGrid(this.getCurrentGridIndex(), FIRST_COLUMN_INDEX, 2, panel, true, false);
	
	//Set the default radio station
	setRadioStation( defaultRadioStation );
	
	//Create navigation button "Close"
	Button closeButton = new Button();
	closeButton.setText( titlesI18N.closeButtonTitle() );
	closeButton.setStyleName( CommonResourcesContainer.USER_DIALOG_ACTION_BUTTON_STYLE );
	closeButton.addClickHandler( new ClickHandler() {
		public void onClick(ClickEvent e) {
			//Close the dialog
			hide();
		}
	} );
	this.addToGrid( SECOND_COLUMN_INDEX, closeButton, false, true);
}
 

import com.google.gwt.user.client.ui.ListBox; //导入方法依赖的package包/类
/**
 * Sets up the View Table subtab.
 */
public OdkTablesManageInstanceFilesSubTab(OdkTablesTabUI parent) {
  this.parent = parent;

  setStylePrimaryName(UIConsts.VERTICAL_FLOW_PANEL_STYLENAME);

  // displayDeleted = false;
  currentTable = null;

  // first construct a copy so you can build the list box before you
  // update it. This seems like bad style.
  currentTables = new ArrayList<TableEntryClient>();

  // set up the box so you can only select one and you provide both the
  // table name and ID.
  tableBox = new ListBox();
  // new TableEntryClientListBox(currentTables, false, false,
  // "Select a table to view.");
  tableBox.addChangeHandler(new ChangeHandler() {

    public void onChange(ChangeEvent event) {
      int selectedIndex = tableBox.getSelectedIndex();
      // Call this to clear the contents while you are waiting on
      // the response from the server.
      tableFileData.updateDisplay(null);
      currentTable = null;
      selectedValue = selectedIndex;
      updateContentsForSelectedTable();
    }
  });

  tableFileData = new OdkTablesViewInstanceFileInfo(this);

  selectTablePanel = new FlexTable();
  selectTablePanel.getElement().setId("select_table_panel");
  selectTablePanel.setHTML(0, 0, "<h2 id=\"table_name\"> Select a Table </h2>");
  selectTablePanel.setWidget(0, 1, tableBox);

  topPanel = new HorizontalPanel();
  topPanel.add(selectTablePanel);
  topPanel.setHorizontalAlignment(HasHorizontalAlignment.ALIGN_JUSTIFY);
  add(topPanel);
  add(tableFileData);

}
 

import com.google.gwt.user.client.ui.ListBox; //导入方法依赖的package包/类
/**
 * Sets up the View Table subtab.
 */
public OdkTablesManageTableFilesSubTab(OdkTablesTabUI parent) {
  this.parent = parent;

  addFileButton = new OdkTablesTableIdServletPopupButton(ADD_FILE_BUTTON_TXT, ADD_FILE_TXT,
      UIConsts.TABLE_FILE_UPLOAD_SERVLET_ADDR, ADD_FILE_TOOLTIP_TXT, ADD_FILE_BALLOON_TXT, this,
      this);

  setStylePrimaryName(UIConsts.VERTICAL_FLOW_PANEL_STYLENAME);

  // displayDeleted = false;
  currentTable = null;

  // first construct a copy so you can build the list box before you
  // update it. This seems like bad style.
  currentTables = new ArrayList<TableEntryClient>();

  // set up the box so you can only select one and you provide both the
  // table name and ID.
  tableBox = new ListBox();
  // new TableEntryClientListBox(currentTables, false, false,
  // "Select a table to view.");
  tableBox.addChangeHandler(new ChangeHandler() {

    public void onChange(ChangeEvent event) {
      int selectedIndex = tableBox.getSelectedIndex();
      // Call this to clear the contents while you are waiting on
      // the response from the server.
      tableFileData.updateDisplay(null);
      currentTable = null;
      selectedValue = selectedIndex;
      updateContentsForSelectedTable();
    }
  });

  tableFileData = new OdkTablesViewTableFileInfo(this);

  selectTablePanel = new FlexTable();
  selectTablePanel.getElement().setId("select_table_panel");
  selectTablePanel.setHTML(0, 0, "<h2 id=\"table_name\"> Select a Table </h2>");
  selectTablePanel.setWidget(0, 1, tableBox);
  if (AggregateUI.getUI().getUserInfo().getGrantedAuthorities()
      .contains(GrantedAuthorityName.ROLE_ADMINISTER_TABLES)) {
    selectTablePanel.setWidget(1, 0, addFileButton);
  }

  // deletedRowsCheckBox = new OdkTablesDisplayDeletedRowsCheckBox(this,
  // displayDeleted);
  // selectTablePanel.setWidget(0, 2, deletedRowsCheckBox);

  topPanel = new HorizontalPanel();
  topPanel.add(selectTablePanel);
  topPanel.setHorizontalAlignment(HasHorizontalAlignment.ALIGN_JUSTIFY);
  add(topPanel);
  add(tableFileData);

}