我正在尝试创建Web视图并向其添加内容。将单击按钮将内容附加到Web视图。在这里,我需要以编程方式将Web视图滚动到所需的位置说(0,60)。我尝试使用JavaScript并使用ScrollBar类的setValue。但没有任何效果。这是样本,
public class FxWebViewSample extends Application {
public static void main(String[] args) {
launch(args);
}
@Override
public void start(Stage primaryStage) throws Exception {
Group root = new Group();
final WebView wView = new WebView();
wView.setId("my_view");
wView.setPrefHeight(200);
wView.setPrefWidth(200);
final WebEngine engine = wView.getEngine();
engine.loadContent("<body contentEditable='true'><div id='content'>Initial Text</div><div id='first'>My first web view in fx</div></body><span id='second'>My first web view in fx</span><span id='second'>My first web view in fx</span><span id='second'>My first web view in fx</span><span id='second'>My first web view in fx</span><span id='second'>My first web view in fx</span><span id='second'>My first web view in fx</span><span id='second'>My first web view in fx</span><span id='second'>My first web view in fx</span><div id='first'>My first web view in fx</div></body></body>");
Button appendbtn = new Button("Append Text to Web View");
TextArea area = new TextArea();
area.setText("My text area");
VBox vBox = new VBox();
vBox.getChildren().addAll(wView, appendbtn);
root.getChildren().add(vBox);
Scene scene = new Scene(root, 300, 300);
primaryStage.setScene(scene);
primaryStage.show();
appendbtn.setOnAction(new EventHandler<ActionEvent>() {
@Override
public void handle(ActionEvent arg0) {
/** To append html and text contents to web view */
String webViewContents = (String) engine
.executeScript("document.documentElement.outerHTML");
String appendContent = "<div>Appended html content</div> Appended text content";
engine.loadContent(webViewContents + appendContent);
/**JavaScript to scroll the view*/
//String scrollJsFtn = "var elem = document.getElementById('my_view');var x = 0;var y = 0;while (elem != null) {x += elem.offsetLeft;y += elem.offsetTop;elem = elem.offsetParent;}window.scrollTo(30, 30);";
//engine.executeScript(scrollJsFtn);
Set<Node> scrollBars = wView.lookupAll(".scroll-bar");
for (Node node : scrollBars) {
if (node instanceof ScrollBar) {
ScrollBar sBar = (ScrollBar) node;
sBar.setValue(100.0);
}
}
}
});
}
}
有没有办法以编程方式设置网页视图的滚动条位置?
答案 0 :(得分:3)
搞清楚。使用JavaScript可以以编程方式滚动Web视图。
public class FxWebViewSample extends Application {
public static void main(String[] args) {
launch(args);
}
@Override
public void start(Stage primaryStage) throws Exception {
Group root = new Group();
final WebView wView = new WebView();
wView.setId("my_view");
wView.setPrefHeight(200);
wView.setPrefWidth(200);
final WebEngine engine = wView.getEngine();
engine.setJavaScriptEnabled(true);
engine.loadContent("<body contentEditable='true'><div id='content'>Initial Text</div><div id='first'>My first web view in fx</div></body><span id='second'>My first web view in fx</span><span id='second'>My first web view in fx</span><span id='second'>My first web view in fx</span><span id='second'>My first web view in fx</span><span id='second'>My first web view in fx</span><span id='second'>My first web view in fx</span><span id='second'>My first web view in fx</span><span id='second'>My first web view in fx</span><div id='first'>My first web view in fx</div></body></body>");
Button appendbtn = new Button("Append Text to Web View");
TextArea area = new TextArea();
area.setText("My text area");
VBox vBox = new VBox();
vBox.getChildren().addAll(wView, appendbtn);
root.getChildren().add(vBox);
Scene scene = new Scene(root, 300, 300);
primaryStage.setScene(scene);
primaryStage.show();
appendbtn.setOnAction(new EventHandler<ActionEvent>() {
@Override
public void handle(ActionEvent arg0) {
/** To append html and text contents to web view */
String webViewContents = (String) engine
.executeScript("document.documentElement.outerHTML");
String appendContent = "<div id='append'>Appended html content</div> Appended text content";
StringBuilder scrollHtml = scrollWebView(0, 50);
engine.loadContent(scrollHtml + webViewContents + appendContent);
}
});
}
public static StringBuilder scrollWebView(int xPos, int yPos) {
StringBuilder script = new StringBuilder().append("<html>");
script.append("<head>");
script.append(" <script language=\"javascript\" type=\"text/javascript\">");
script.append(" function toBottom(){");
script.append(" window.scrollTo(" + xPos + ", " + yPos + ");");
script.append(" }");
script.append(" </script>");
script.append("</head>");
script.append("<body onload='toBottom()'>");
return script;
}
}