listview - 如何在以多种方式更新时使用 MVC 动态过滤列表视图控件？

--module-path C:\Users\ ... \Documents\javafx-sdk-16\lib --add-modules javafx.base,javafx.controls,javafx.fxml,javafx.graphics,javafx.swing,javafx.web,javafx.swt --add-exports javafx.graphics/com.sun.glass.ui=ALL-UNNAMED

package minimalsandbox; import javafx.application.Application; import javafx.collections.FXCollections; import javafx.collections.ObservableList; import javafx.fxml.FXMLLoader; import javafx.geometry.Rectangle2D; import javafx.scene.Parent; import javafx.scene.Scene; import javafx.scene.input.Clipboard; import javafx.stage.Screen; import javafx.stage.Stage; public class Main extends Application { @Override public void start(Stage primaryStage) throws Exception { FXMLLoader loader =new FXMLLoader(); loader.setLocation(Main.class.getResource("/minimalsandbox/View.fxml")); Parent root = loader.load(); Scene scene = new Scene(root); primaryStage.setScene(scene); primaryStage.setX(200); primaryStage.setY(500); Rectangle2D bounds = Screen.getPrimary().getVisualBounds(); double x = bounds.getMinX() + (bounds.getWidth() - scene.getWidth()) * 0.2; double y = bounds.getMinY() + (bounds.getHeight() - scene.getHeight()) * 0.55; primaryStage.setX(x); primaryStage.setY(y); // -------------------------------------------------------------------------------------------------------------------- // in main, clipboard listener // -------------------------------------------------------------------------------------------------------------------- final Clipboard systemClipboard = Clipboard.getSystemClipboard(); new com.sun.glass.ui.ClipboardAssistance(com.sun.glass.ui.Clipboard.SYSTEM) { @Override public void contentChanged() { System.out.print("System clipboard content changed: "); if ( systemClipboard.hasImage() ) { System.out.println("image"); } else if ( systemClipboard.hasString() ) { System.out.println("string"); //System.out.println(Clipboard.getSystemClipboard().getString()); System.out.println("current thread: " + Thread.currentThread().getName()); minimalsandbox.Controller controller = loader.getController(); // works1 String fromclipboard = Clipboard.getSystemClipboard().getString(); ObservableList<String> items = FXCollections.observableArrayList(); // does this `items` observable list gets re-generated every time the clipboard changes ? controller.mylistviewvar.getItems().add(0,fromclipboard); // works1 } else if ( systemClipboard.hasFiles() ) { System.out.println("files"); } } }; // -------------------------------------------------------------------------------------------------------------------- // -------------------------------------------------------------------------------------------------------------------- primaryStage.show(); System.out.println("crrent thread: " + Thread.currentThread().getName()); } // start stage ends -------------------------------------------- public final minimalsandbox.Controller controller = new Controller(); } // Main ends

package minimalsandbox; import javafx.collections.FXCollections; import javafx.collections.ObservableList; import javafx.collections.transformation.FilteredList; import javafx.fxml.FXML; import javafx.fxml.Initializable; import javafx.scene.control.Button; import javafx.scene.control.ListView; import javafx.scene.control.ToggleButton; import javafx.scene.input.*; import javafx.scene.layout.AnchorPane; import javafx.scene.input.Clipboard; import javafx.stage.Stage; import javafx.scene.control.TextField; import java.net.URL; import java.util.ResourceBundle; public class Controller implements Initializable { @FXML private Button myButton01; @FXML public ListView<String> mylistviewvar; public void setMylistviewvar(String listviewvar) { mylistviewvar.getItems().add(listviewvar); } @FXML void myButton01myEventClicked(MouseEvent event) { System.out.println("hi there !"); // to put string INTO clipboard Clipboard clipboard = Clipboard.getSystemClipboard(); ClipboardContent content = new ClipboardContent(); content.putString("Some text"); clipboard.setContent(content); // to copy from clipboard String fromclipboardstr = Clipboard.getSystemClipboard().getString(); System.out.println(fromclipboardstr); } // button click ends @FXML private ToggleButton myToggleBut; @FXML private AnchorPane myAnchorPane; @FXML void myToggleButEventSB(MouseEvent event) { if (myToggleBut.isSelected()) { System.out.println("is ON"); Stage stage = (Stage) myAnchorPane.getScene().getWindow(); stage.setAlwaysOnTop(true); }else { System.out.println("is OFF"); Stage stage = (Stage) myAnchorPane.getScene().getWindow(); stage.setAlwaysOnTop(false); } } @FXML private TextField searchFieldvar; public TextField getSearchFieldvar() { return searchFieldvar; } public void setSearchFieldvar(TextField searchFieldvar) { this.searchFieldvar = searchFieldvar; } //FilteredList<String> filteredNames = new FilteredList<>(mylistviewvar.getItems()); @FXML void myonKeyTyped(KeyEvent event) { System.out.println("input changed"); // mylistviewvar.setItems(filteredNames); } @Override public void initialize(URL url, ResourceBundle resourceBundle) { ObservableList<String> data = FXCollections.observableArrayList(mylistviewvar.getItems()); FilteredList<String> filteredData = new FilteredList<>(data, s -> true); searchFieldvar.textProperty().addListener(obs->{ String filter = searchFieldvar.getText(); if(filter == null || filter.length() == 0) { filteredData.setPredicate(s -> true); } else { filteredData.setPredicate(s -> s.contains(filter)); } }); } // initializable ends ------------------------------- } // Controller ends

<?xml version="1.0" encoding="UTF-8"?> <?import javafx.scene.control.Button?> <?import javafx.scene.control.ListView?> <?import javafx.scene.control.TextArea?> <?import javafx.scene.control.TextField?> <?import javafx.scene.control.ToggleButton?> <?import javafx.scene.layout.AnchorPane?> <AnchorPane fx:id="myAnchorPane" prefHeight="374.0" prefWidth="1188.0" xmlns="http://javafx.com/javafx/16" xmlns:fx="http://javafx.com/fxml/1" fx:controller="minimalsandbox.Controller"> <children> <Button fx:id="myButton01" layoutX="42.0" layoutY="28.0" mnemonicParsing="false" onMouseClicked="#myButton01myEventClicked" text="Get clipboard type" /> <ListView fx:id="mylistviewvar" layoutX="14.0" layoutY="133.0" prefHeight="229.0" prefWidth="561.0" /> <TextField fx:id="searchFieldvar" layoutX="157.0" layoutY="89.0" onKeyTyped="#myonKeyTyped" prefHeight="37.0" prefWidth="297.0" /> <TextArea layoutX="583.0" layoutY="133.0" prefHeight="229.0" prefWidth="591.0" /> <ToggleButton fx:id="myToggleBut" layoutX="526.0" layoutY="16.0" mnemonicParsing="false" onMouseClicked="#myToggleButEventSB" prefHeight="25.0" prefWidth="98.0" text="On Top" /> </children> </AnchorPane>