这是我的项目设置我尝试更新webview，因此每个标签都会被一个地址栏更新。我似乎无法找到我出错的地方。我是javaFX的新手。我知道我必须在那里为搜索按钮添加另一个更改侦听器，但不确定如何...我无法找到有关如何执行此操作的任何内容。除了一个没有真正解释任何事情并且代码混乱的例子。
public class Client extends Application {
private Scene scene;
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
BorderPane root = new BorderPane();
Browser browseR = new Browser();
final TabPane tabs = new TabPane();
final Tab home = new Tab("Home");
final Tab newtab = new Tab("+");
HBox hbox = new HBox();
public static TextField addressBar = new TextField();
final Group group = new Group(tabs,root,hbox); //joins the borderpane and browser element together
@Override public void start(Stage stage) {
// create the scene
stage.setTitle("Web Browser");
scene = new Scene(group,screenSize.getWidth(),screenSize.getHeight(), Color.web("#666970")); //create scene with root pane and browser pane
hbox.setSpacing(10);
hbox.setStyle("-fx-background-color: #FFFFFF;");
hbox.setPadding(new Insets(5, 24, 5, 12));
Button backButton = new Button("<");
backButton.setOnAction(this::backButtonHandler);
backButton.setPrefSize(25, 20);
Button forwardButton = new Button(">");
forwardButton.setOnAction(this::forwardButtonHandler);
forwardButton.setPrefSize(25, 20);
HBox.setHgrow(addressBar, Priority.ALWAYS);
//addressBar.setMaxWidth(screenSize.getWidth()-200);
Button searchButton = new Button("go");
searchButton.setOnAction(this::searchButtonHandler);
//add all menu elements to the top of the screen
hbox.getChildren().addAll(backButton, forwardButton,addressBar,searchButton);
setConstraints(tabs,hbox,stage);
createHomeTab();
createNewTab();
tabs.getSelectionModel().selectedItemProperty().addListener(new ChangeListener<Tab>() {
@Override
public void changed(ObservableValue<? extends Tab> observable, Tab oldSelectedTab, Tab newSelectedTab) {
if(newSelectedTab == newtab) {
final Tab tab = new Tab(browseR.getWebTitle());
tabs.getTabs().add(tab);
tabs.getSelectionModel().select(tab);
tab.setContent(new Browser());
loadFavicon(addressBar.getText(),tab);
}
}
});
root.setTop(hbox);
root.setCenter(tabs);
browseR.updateAddress();
stage.setScene(scene);
stage.show();
}
public static void setConstraints(TabPane tabs, HBox hbox, Stage stage) {
hbox.prefWidthProperty().bind(stage.widthProperty());
tabs.prefHeightProperty().bind(stage.heightProperty());
}
private void backButtonHandler(ActionEvent event) {
browseR.goBack();
}
public void createHomeTab() {
tabs.getTabs().addAll(newtab,home);
tabs.getSelectionModel().select(home);
home.setContent(new Browser());
loadFavicon(Browser.getHomePage(),home);
}
private void forwardButtonHandler(ActionEvent event) {
browseR.goForward();
}
public void createNewTab() {
newtab.setText(" + ");
newtab.setClosable(false);
}
private void searchButtonHandler(ActionEvent event) {
Browser.navigate(addressBar.getText());
}
void loadFavicon(String location, Tab tab) {
try {
String faviconUrl = String.format("http://www.google.com/s2/favicons?domain_url=%s", URLEncoder.encode(location, "UTF-8"));
Image favicon = new Image(faviconUrl, true);
ImageView iv = new ImageView(favicon);
tab.setGraphic(iv);
} catch (UnsupportedEncodingException ex) {
throw new RuntimeException(ex); // not expected
}
}
public static void main(String[] args){
//new Config();
launch(args);
}
}
public class Browser extends Region {
public static WebView browser = new WebView();
public static WebEngine webEngine = getBrowser().getEngine();
static String[] websites = {"http://www.google.com"};
private static String homePage = websites[0];
public Browser() {
//apply the styles
getStyleClass().add("browser");
// load the web page
webEngine.load(homePage);
//add the web view to the scene
getChildren().add(getBrowser());
}
public static void navigate(String website) {
String google = "http://www.google.com/search?q=";
String charset = "UTF-8";
if(website.contains("http")) {
webEngine.load(website);
//debug
System.out.println("found http");
}
else {
try {
webEngine.load(google+ URLEncoder.encode(website, charset));
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
}
//debug
System.out.println(website);
}
/*
private Node createSpacer() {
Region spacer = new Region();
HBox.setHgrow(spacer, Priority.ALWAYS);
return spacer;
}
*/
public String getWebTitle() {
return webEngine.getTitle();
}
public void goBack() {
Platform.runLater(() -> {
webEngine.executeScript("history.back()");
});
}
public String updateAddress() {
webEngine.getLoadWorker().stateProperty().addListener((observable, oldValue, newValue) -> {
if (Worker.State.SUCCEEDED.equals(newValue)) {
Client.addressBar.setText(webEngine.getLocation());
}
});
return null;
}
public void goForward() {
Platform.runLater(() -> {
webEngine.executeScript("history.forward()");
});
}
@Override protected void layoutChildren() {
double w = getWidth();
double h = getHeight();
layoutInArea(getBrowser(),0,0,w,h,0, HPos.CENTER, VPos.CENTER);
}
@Override protected double computePrefWidth(double height) {
return 750;
}
@Override protected double computePrefHeight(double width) {
return 500;
}
//getters and setters
public static String getHomePage() {
return homePage;
}
public static void setHomePage(String homePage) {
Browser.homePage = homePage;
}
public static WebView getBrowser() {
return browser;
}
答案 0 :(得分：0)
如果我正确理解了这个问题，你就会有一个文本字段和多个标签，每个标签都有一个浏览器。当在文本字段上发生操作时，您希望在当前选定的选项卡中更新浏览器的位置。
最简单的方法是保持对当前显示的浏览器的引用：
public class Client extends Application {
private Browser displayedBrowser ;
// ...
}
当您创建新标签页和浏览器时，请在标签selectedProperty中添加一个监听器，以更新displayedBrowser字段：
tabs.getSelectionModel().selectedItemProperty().addListener(new ChangeListener<Tab>() {
@Override
public void changed(ObservableValue<? extends Tab> observable, Tab oldSelectedTab, Tab newSelectedTab) {
if(newSelectedTab == newtab) {
final Tab tab = new Tab(browseR.getWebTitle());
tabs.getTabs().add(tab);
Browser newBrowser = new Browser();
tab.selectedProperty().addListener((obs, wasSelected, isNowSelected) -> {
if (isNowSelected) {
displayedBrowser = newBrowser ;
}
});
tabs.getSelectionModel().select(tab);
tab.setContent(newBrowser);
loadFavicon(addressBar.getText(),tab);
}
}
});
现在displayedBrowser将始终指向当前所选标签中的浏览器。
显然，navigate不能是静态方法，因为您想要导航特定的浏览器：事实上Browser类中的 nothing 应该是静态的：remove 来自static类的Browser关键字的所有次出现。完成这些更改后，您只需更新当前浏览器：
private void searchButtonHandler(ActionEvent event) {
displayedBrowser.navigate(addressBar.getText());
}