我已经从 netbeans 7.2 中给出的示例项目创建了 javafx webview 浏览器,我试图在从另一个 Jframe 表单单击按钮时调用此浏览器。但是它给出的错误是调用jframe不是Application的子类
以下是 Java fx WebviewBrowser 的代码。
import java.util.List;
import javafx.application.Application;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.geometry.HPos;
import javafx.geometry.Insets;
import javafx.geometry.VPos;
import javafx.scene.Node;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.TextField;
import javafx.scene.layout.ColumnConstraints;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.Pane;
import javafx.scene.layout.Priority;
import javafx.scene.layout.VBox;
import javafx.scene.web.WebEngine;
import javafx.scene.web.WebView;
import javafx.stage.Stage;
public class WebViewBrowser extends Application {
@Override public void start(Stage primaryStage) throws Exception {
Pane root = new WebViewPane();
primaryStage.setScene(new Scene(root, 1024, 768));
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
public class WebViewPane extends Pane {
public WebViewPane() {
VBox.setVgrow(this, Priority.ALWAYS);
setMaxWidth(Double.MAX_VALUE);
setMaxHeight(Double.MAX_VALUE);
WebView view = new WebView();
view.setMinSize(500, 400);
view.setPrefSize(500, 400);
final WebEngine eng = view.getEngine();
eng.load("http://www.lawcrux.com/");
// final TextField locationField = new TextField("http://www.oracle.com/us/index.html");
// locationField.setMaxHeight(Double.MAX_VALUE);
Button goButton = new Button("Go");
goButton.setDefaultButton(true);
EventHandler<ActionEvent> goAction = new EventHandler<ActionEvent>() {
@Override public void handle(ActionEvent event) {
// eng.load(locationField.getText().startsWith("http://") ? locationField.getText() :
// "http://" + locationField.getText());
}
};
// goButton.setOnAction(goAction);
// locationField.setOnAction(goAction);
eng.locationProperty().addListener(new ChangeListener<String>() {
@Override public void changed(ObservableValue<? extends String> observable, String oldValue, String newValue) {
// locationField.setText(newValue);
}
});
GridPane grid = new GridPane();
grid.setVgap(5);
grid.setHgap(5);
// GridPane.setConstraints(locationField, 0, 0, 1, 1, HPos.CENTER, VPos.CENTER, Priority.ALWAYS, Priority.SOMETIMES);
GridPane.setConstraints(goButton,1,0);
GridPane.setConstraints(view, 0, 1, 2, 1, HPos.CENTER, VPos.CENTER, Priority.ALWAYS, Priority.ALWAYS);
grid.getColumnConstraints().addAll(
new ColumnConstraints(100, 100, Double.MAX_VALUE, Priority.ALWAYS, HPos.CENTER, true),
new ColumnConstraints(40, 40, 40, Priority.NEVER, HPos.CENTER, true)
);
// grid.getChildren().addAll(locationField, goButton, view);
getChildren().add(grid);
}
@Override protected void layoutChildren() {
List<Node> managed = getManagedChildren();
double width = getWidth();
double height = getHeight();
double top = getInsets().getTop();
double right = getInsets().getRight();
double left = getInsets().getLeft();
double bottom = getInsets().getBottom();
for (int i = 0; i < managed.size(); i++) {
Node child = managed.get(i);
layoutInArea(child, left, top,
width - left - right, height - top - bottom,
0, Insets.EMPTY, true, true, HPos.CENTER, VPos.CENTER);
}
}
}
}
在另一个 Jframe on Button 单击上,我将此 webviewbrowser 称为以下代码。
WebViewBrowser frm= new WebViewBrowser();
WebViewBrowser.launch();
frm.launch();