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我已經創建了一個自定義控件調用它ComboBoxTablePopup延伸Comboboxbase類。我已經使用tableview作爲彈出式內容。一切正常， 更新值，顯示彈出，隱藏彈出。在將焦點從ComboBoxTablePopup切換到另一個控件（如TextField或Spinner）後，它會使用空值更新它自己。 所以，我不知道是什麼讓這種情況發生。所以這裏是我的自執行類的實現。JavaFX Combobox自定義控件焦點丟失問題
import com.sun.javafx.scene.control.behavior.ComboBoxBaseBehavior;
import com.sun.javafx.scene.control.behavior.KeyBinding;
import com.sun.javafx.scene.control.skin.ComboBoxListViewSkin;
import com.sun.javafx.scene.control.skin.ComboBoxPopupControl;
import javafx.application.Application;
import javafx.beans.InvalidationListener;
import javafx.beans.WeakInvalidationListener;
import javafx.beans.property.ObjectProperty;
import javafx.beans.property.ReadOnlyObjectProperty;
import javafx.beans.property.ReadOnlyObjectWrapper;
import javafx.beans.property.SimpleObjectProperty;
import javafx.collections.FXCollections;
import javafx.collections.ListChangeListener;
import javafx.collections.ObservableList;
import javafx.collections.WeakListChangeListener;
import javafx.event.ActionEvent;
import javafx.scene.Node;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.control.cell.PropertyValueFactory;
import javafx.scene.input.KeyCode;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;
import javafx.util.StringConverter;
import java.util.ArrayList;
import java.util.List;
import java.util.function.Predicate;
public class TestComboboxTablePopup extends Application {
@Override
public void start(Stage primaryStage) throws Exception {
ComboBoxTablePopupControl<dataModel> comboBoxTablePopup = new ComboBoxTablePopupControl<>();
TableColumn<dataModel, Integer> tcId = new TableColumn<>("Id");
TableColumn<dataModel, String> tcName = new TableColumn<>("Name");
tcId.setCellValueFactory(new PropertyValueFactory<dataModel, Integer>("id"));
tcName.setCellValueFactory(new PropertyValueFactory<dataModel, String>("name"));
comboBoxTablePopup.setColumns(FXCollections.observableArrayList(tcId, tcName));
comboBoxTablePopup.setItems(FXCollections.observableArrayList(
new dataModel(1, "Data Model object 1"),
new dataModel(2, "Data Model object 2"),
new dataModel(3, "Data Model object 3")
));
VBox vBox = new VBox(comboBoxTablePopup);
Scene scene = new Scene(vBox);
primaryStage.setScene(scene);
primaryStage.setWidth(400);
primaryStage.setHeight(300);
primaryStage.show();
}
public class dataModel {
private int id;
private String name;
public dataModel(int id, String name) {
this.id = id;
this.name = name;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
private static <S> StringConverter<S> defaultStringConverter() {
return new StringConverter<S>() {
@Override
public String toString(S t) {
return t == null ? "abood fait" : t.toString();
}
@Override
public S fromString(String string) {
return null;
}
};
}
private class ComboBoxTablePopupControl<S> extends ComboBoxBase {
/***************************************************************************
* *
* Static properties and methods *
* *
**************************************************************************/
private static final String DEFAULT_STYLE_CLASS = "combobox-table-popup";
private ObjectProperty<ObservableList<S>> items = new SimpleObjectProperty<ObservableList<S>>(this, "items");
public final void setItems(ObservableList<S> value) {
itemsProperty().set(value);
}
public final ObservableList<S> getItems() {
return items.get();
}
public ObjectProperty<ObservableList<S>> itemsProperty() {
return items;
}
public ObjectProperty<StringConverter<S>> converterProperty() {
return converter;
}
private ObjectProperty<StringConverter<S>> converter =
new SimpleObjectProperty<StringConverter<S>>(this, "converter", defaultStringConverter());
public final void setConverter(StringConverter<S> value) {
converterProperty().set(value);
}
public final StringConverter<S> getConverter() {
return converterProperty().get();
}
// Editor
private ReadOnlyObjectWrapper<TextField> editor;
public final TextField getEditor() {
return editorProperty().get();
}
public final ReadOnlyObjectProperty<TextField> editorProperty() {
if (editor == null) {
editor = new ReadOnlyObjectWrapper<TextField>(this, "editor");
editor.set(new ComboBoxListViewSkin.FakeFocusTextField());
}
return editor.getReadOnlyProperty();
}
private
ObservableList<TableColumn<S, ?>> columns = FXCollections.observableArrayList();
public ObservableList<TableColumn<S, ?>> getColumns() {
return columns;
}
public void setColumns(ObservableList<TableColumn<S, ?>> columns) {
this.columns = columns;
}
/***************************************************************************
* *
* Constructors *
* *
**************************************************************************/
/**
* Creates a default ComboboxTablePopup instance with an empty
* {@link #itemsProperty() items} list and default
* {@link #selectionModelProperty() selection model}.
*/
public ComboBoxTablePopupControl() {
this(FXCollections.<S>emptyObservableList());
}
/**
* Creates a default ComboboxTablePopup instance with the provided items list and
* a default { selection model}.
*/
public ComboBoxTablePopupControl(ObservableList<S> items) {
setItems(items);
getStyleClass().add(DEFAULT_STYLE_CLASS);
setEditable(true);
valueProperty().addListener((observable, oldValue, newValue) -> {
System.out.println(newValue);
});
}
public ComboBoxTablePopupControl(ObservableList<S> items, ObservableList<TableColumn<S, ?>> columns) {
this(items);
this.columns = columns;
}
@Override
protected Skin<?> createDefaultSkin() {
return new ComboBoxTablePopupControlSkin<>(this);
}
}
public class ComboBoxTablePopupControlSkin<S> extends ComboBoxPopupControl {
private ComboBoxTablePopupControl comboBoxTablePopup;
private ObservableList<S> comboboxTablePopupItems;
private TableView<S> tableViewPopupContent;
private ObservableList<S> tableViewPopupItems;
private Predicate<S> predicate;
private final InvalidationListener itemsObserver;
private final ListChangeListener<S> tableViewItemsListener = new ListChangeListener<S>() {
@Override
public void onChanged(ListChangeListener.Change<? extends S> c) {
getSkinnable().requestLayout();
}
};
private final WeakListChangeListener<S> weakListViewItemsListener =
new WeakListChangeListener<S>(tableViewItemsListener);
public ComboBoxTablePopupControlSkin(ComboBoxTablePopupControl comboBoxTablePopup) {
super(comboBoxTablePopup, new ComboBoxBaseBehavior(comboBoxTablePopup, null));
this.comboBoxTablePopup = comboBoxTablePopup;
updateComboBoxTablePopupItems();
itemsObserver = observable -> {
updateComboBoxTablePopupItems();
updateTableViewItems();
};
this.comboBoxTablePopup.itemsProperty().addListener(new WeakInvalidationListener(itemsObserver));
tableViewPopupContent = createTableView();
tableViewPopupContent.setManaged(false);
getChildren().add(tableViewPopupContent);
updateTableViewItems();
registerChangeListener(comboBoxTablePopup.converterProperty(), "CONVERTER");
registerChangeListener(comboBoxTablePopup.itemsProperty(), "ITEMS");
registerChangeListener(comboBoxTablePopup.valueProperty(), "VALUE");
registerChangeListener(comboBoxTablePopup.editorProperty(), "EDITABLE");
}
private void updateTableViewItems() {
this.tableViewPopupItems = comboBoxTablePopup.getItems();
this.tableViewPopupContent.setItems(this.tableViewPopupItems);
if (tableViewPopupItems != null) {
tableViewPopupItems.removeListener(weakListViewItemsListener);
}
this.tableViewPopupItems = comboboxTablePopupItems;
tableViewPopupContent.setItems(tableViewPopupItems);
if (tableViewPopupItems != null) {
tableViewPopupItems.addListener(weakListViewItemsListener);
}
getSkinnable().requestLayout();
}
public void updateComboBoxTablePopupItems() {
comboboxTablePopupItems = comboBoxTablePopup.getItems();
comboboxTablePopupItems = comboboxTablePopupItems == null ? FXCollections.<S>emptyObservableList() : comboboxTablePopupItems;
}
private TableView<S> createTableView() {
final TableView<S> tableView = new TableView<>();
tableView.setId("table-view");
tableView.getSelectionModel().setSelectionMode(SelectionMode.SINGLE);
tableView.setFocusTraversable(false);
for (TableColumn tblColumn : tableColumns()) {
tableView.getColumns().add(tblColumn);
}
tableView.getSelectionModel().selectedItemProperty().addListener(o -> {
S selectedItem = tableView.getSelectionModel().getSelectedItem();
comboBoxTablePopup.setValue(selectedItem);
});
tableView.setOnKeyPressed(e -> {
if (e.getCode() == KeyCode.ENTER ||
e.getCode() == KeyCode.SPACE) {
S selectedItem = tableView.getSelectionModel().getSelectedItem();
comboBoxTablePopup.setValue(selectedItem);
comboBoxTablePopup.hide();
}
});
return tableView;
}
private ObservableList<TableColumn> tableColumns() {
return ((ComboBoxTablePopupControl) getSkinnable()).getColumns();
}
@Override
protected Node getPopupContent() {
return this.tableViewPopupContent;
}
@Override
protected TextField getEditor() {
return ((ComboBoxTablePopupControl) getSkinnable()).getEditor();
}
@Override
protected StringConverter<S> getConverter() {
return ((ComboBoxTablePopupControl) getSkinnable()).getConverter();
}
@Override
public Node getDisplayNode() {
Node displayNode;
displayNode = getEditableInputNode();
updateDisplayNode();
return displayNode;
}
@Override
protected void handleControlPropertyChanged(String p) {
if ("VALUE".equals(p)) {
updateDisplayNode();
System.out.println(comboBoxTablePopup.getValue());
comboBoxTablePopup.fireEvent(new ActionEvent());
} else if ("CONVERTER".equals(p)) {
updateDisplayNode();
System.out.println("Conveter peroptery");
} else if ("ITEMS".equals(p)) {
updateComboBoxTablePopupItems();
updateTableViewItems();
} else if ("EDITOR".equals(p)) {
getEditableInputNode();
} else
super.handleControlPropertyChanged(p);
}
}
}
哇，這是的代碼加載。它必須是您的控件的價值設置在第一位（或數據綁定到您的控件）的某個點。也許你可以指出這是怎麼發生的，或者至少在示例應用程序中添加一個關於如何使用控件的示例 - 這可能有助於在沒有太多調查的情況下開始使用。 – Fuzzzzel
我已經添加了一個完整的運行示例，請嘗試找出我的問題。 –