我對 Java 有點陌生，我正在嘗試在 JavaFX 中創建一個用戶界面，每當用戶按下“+”按鈕時，它就會動態添加一個 TextField 和一個“編輯”按鈕。我知道嘗試將這些按鈕和文本字段存儲在列表中是個好主意，但我不確定如何將它們放在界面上ListView<Button> dinamicButtons = new ListView<Button>();ListView<TextField> dinamicTextFields = new ListView<TextField>();int quantityOfDinamicFieldsAdded =0; Button add= new Button ("+"); add.setOnAction(e -> { dinamicButtons .add(quantityOfDinamicFieldsAdded , new Button("Edit")); dinamicTextFields .add(quantityOfDinamicFieldsAdded , new TextField("nome do Componente")); quantityOfDinamicFieldsAdded ++; //remove dynamically added buttons and text fields for (int i=0 ; i<quantityOfDinamicFieldsAdded ; i++){ //add them all back } });
1 回答
繁星點點滴滴
TA貢獻1803條經驗 獲得超3個贊
這是一個將Buttonand添加TextField到ListView. 只是POJO跟蹤提示TextField's文本和Button's文本。關鍵是使用CellFactory.
import java.util.concurrent.atomic.AtomicInteger;
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.ListCell;
import javafx.scene.control.ListView;
import javafx.scene.control.TextField;
import javafx.scene.layout.HBox;
import javafx.scene.layout.Priority;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;
/**
*
* @author blj0011
*/
public class JavaFXTestingGround extends Application{
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
launch(args);
}
@Override
public void start(Stage stage) throws Exception {
ListView<CellData> listView = new ListView();
listView.setCellFactory((ListView<CellData> param) -> {
ListCell<CellData> cell = new ListCell<CellData>() {
TextField textField = new TextField();
Button button = new Button();
HBox hBox = new HBox(textField, button);
{
HBox.setHgrow(textField, Priority.ALWAYS);
}
@Override
protected void updateItem(CellData item, boolean empty) {
super.updateItem(item, empty);
if (item != null) {
textField.setPromptText(item.getTextFieldPromptText());
button.setText(item.getButtonText());
button.setOnAction((actionEvent) -> {
System.out.println("You clicked " + button.getText() + ". TextField Prompt text is " + textField.getPromptText() + ".");
});
setGraphic(hBox);
} else {
setGraphic(null);
}
}
};
return cell;
});
AtomicInteger i = new AtomicInteger(1);
Button button = new Button("Add Item");
button.setOnAction((event) -> {
listView.getItems().add(new CellData("Prompt Text: " + i.get(), "Button: " + i.getAndIncrement()));
});
VBox root = new VBox(button, listView);
stage.setScene(new Scene(root));
stage.show();
}
}
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