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我是一個初學者,正在與javafx進行一個簡單的聊天工作,我已經搜索過類似的問題,並沒有找到合適的解決方案。我需要做的第一件事是圖形。我的第一個問題是,我的按鈕MousEvent偵聽器無法正常工作,我只是不能點擊按鈕。我的第二個問題是,一旦應用程序正在運行,並且我點擊了TextField之外的某個位置,我就不能返回並輸入新的文本。就像TextField的監聽器一樣,監聽KeyStroke事件不再運行。代碼:JavaFx聊天TextField和按鈕密鑰監聽器
import javafx.application.Application;
import javafx.event.EventHandler;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.ScrollPane;
import javafx.scene.control.ScrollPane.ScrollBarPolicy;
import javafx.scene.control.TextArea;
import javafx.scene.control.TextField;
import javafx.scene.input.KeyCode;
import javafx.scene.input.KeyEvent;
import javafx.scene.layout.Pane;
import javafx.scene.layout.StackPane;
import javafx.scene.layout.VBox;
import javafx.scene.paint.Color;
import javafx.stage.Stage;
public class ChatView extends Application {
String s;
@Override
public void start(Stage stage){
s = "";
StackPane rootPane = new StackPane();
TextField enterMessageField = new TextField();
enterMessageField.setEditable(true);
TextArea displayAllMessages = new TextArea();
displayAllMessages.setPrefHeight(500);
displayAllMessages.setEditable(false);
ScrollPane scrollPane = new ScrollPane();
scrollPane.setContent(displayAllMessages);
scrollPane.setVbarPolicy(ScrollBarPolicy.ALWAYS);
displayAllMessages.setPrefWidth(650);
Button button = new Button("Send Message");
VBox vBoxChat = new VBox();
vBoxChat.setPadding(new Insets(650, 200, 20, 20));
vBoxChat.getChildren().addAll(enterMessageField);
VBox vBoxChatIncoming = new VBox();
vBoxChatIncoming.setPadding(new Insets(20, 20, 20, 20));
vBoxChatIncoming.getChildren().addAll(scrollPane);
VBox vBoxEnter = new VBox();
vBoxEnter.setPadding(new Insets(650, 20, 20, 550));
vBoxEnter.getChildren().add(button);
rootPane.getChildren().addAll(vBoxChat, vBoxEnter, vBoxChatIncoming);
Scene scene = new Scene(rootPane, 700, 700, Color.WHITE);
stage.setScene(scene);
stage.setTitle("Chat");
stage.show();
enterMessageField.setOnKeyPressed(new EventHandler <KeyEvent>() {
@Override
public void handle(KeyEvent event){
if (event.getCode() == KeyCode.ENTER){
s = enterMessageField.getText() + "\n";
enterMessageField.setText("");
displayAllMessages.appendText(s);
}
}
});
button.setOnAction((event) -> {
s = enterMessageField.getText() + "\n";
enterMessageField.setText("");
System.out.println(s);
});
}
public static void main(String[] args){
launch(args);
}
}
謝謝您的幫助!
注意,有一個''爲當用戶按下輸入被觸發TextField' onAction'事件。 – fabian