我有一个可编辑的 TableView,带有一个按钮,用于添加新行,然后在该行的第一列上调用 table.edit() 。当用户想要添加不在视口之外的行时,应该发生的情况是表格在视口内滚动新行并开始编辑。但是,调用 table.scrollTo(newRow) 会导致各种错误行为。该行已进入视图,但只有部分时间进行编辑。最常见的情况似乎是视口中的第一行开始编辑,而不是新添加的行。这种情况发生在将添加到视图中的行以及将不在视图中的行上。
我的代码:
import javafx.application.Application;
import javafx.application.Platform;
import javafx.beans.property.SimpleStringProperty;
import javafx.beans.property.StringProperty;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.geometry.Insets;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableColumn.CellEditEvent;
import javafx.scene.control.TableView;
import javafx.scene.control.cell.PropertyValueFactory;
import javafx.scene.control.cell.TextFieldTableCell;
import javafx.scene.layout.HBox;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;
public class TableViewScrollToTest extends Application {
private final TableView<Person> table = new TableView<>();
private final ObservableList<Person> data = FXCollections.observableArrayList();
private final HBox hb = new HBox();
private final Button addButton = new Button("_Add");
private int seq = 0;
@Override
public void start(Stage primaryStage) throws Exception {
Scene scene = new Scene(new Group());
primaryStage.setTitle("Table View Scroll To Test");
primaryStage.setWidth(450);
primaryStage.setHeight(300);
table.setEditable(true);
TableColumn<Person, String> firstNameCol = new TableColumn<>("First Name");
firstNameCol.setMinWidth(100);
firstNameCol.setCellValueFactory(new PropertyValueFactory<Person, String>("firstName"));
firstNameCol.setCellFactory(TextFieldTableCell.<Person> forTableColumn());
firstNameCol.setOnEditCommit((CellEditEvent<Person, String> event) -> {
event.getRowValue().setFirstName(event.getNewValue());
});
TableColumn<Person, String> lastNameCol = new TableColumn<>("Last Name");
lastNameCol.setMinWidth(100);
lastNameCol.setCellValueFactory(new PropertyValueFactory<Person, String>("lastName"));
lastNameCol.setCellFactory(TextFieldTableCell.<Person> forTableColumn());
lastNameCol.setOnEditCommit((CellEditEvent<Person, String> event) -> {
event.getRowValue().setLastName(event.getNewValue());
});
TableColumn<Person, String> emailCol = new TableColumn<>("Email");
emailCol.setMinWidth(200);
emailCol.setCellValueFactory(new PropertyValueFactory<Person, String>("email"));
emailCol.setCellFactory(TextFieldTableCell.<Person> forTableColumn());
emailCol.setOnEditCommit((CellEditEvent<Person, String> event) -> {
event.getRowValue().setEmail(event.getNewValue());
});
table.setItems(data);
table.getColumns().addAll(firstNameCol, lastNameCol, emailCol);
table.setPrefHeight(165);
addButton.setOnAction(event -> {
table.getSelectionModel().clearSelection();
Person p = new Person("First Name", "Last Name " + seq++, "");
data.add(p);
table.getSelectionModel().select(p);
Platform.runLater(() -> {
table.scrollTo(p); //causes buggy behavior
table.edit(data.indexOf(p), firstNameCol);
});
});
hb.getChildren().add(addButton);
final VBox vbox = new VBox();
vbox.setSpacing(5);
vbox.setPadding(new Insets(10, 0, 0, 10));
vbox.getChildren().addAll(table, hb);
((Group)scene.getRoot()).getChildren().addAll(vbox);
primaryStage.setScene(scene);
primaryStage.show();
}
public static class Person {
private StringProperty firstName;
private StringProperty lastName;
private StringProperty email;
public Person(String first, String last, String email) {
firstName = new SimpleStringProperty(this, "firstName", first);
lastName = new SimpleStringProperty(this, "lastName", last);
this.email = new SimpleStringProperty(this, "email", email);
}
public void setFirstName(String value) { firstNameProperty().set(value); }
public String getFirstName() { return firstNameProperty().get(); }
public StringProperty firstNameProperty() {
if (firstName == null) firstName = new SimpleStringProperty(this, "firstName", "First");
return firstName;
}
public void setLastName(String value) { lastNameProperty().set(value); }
public String getLastName() { return lastNameProperty().get(); }
public StringProperty lastNameProperty() {
if (lastName == null) lastName = new SimpleStringProperty(this, "lastName", "Last");
return lastName;
}
public void setEmail(String value) { emailProperty().set(value); }
public String getEmail() { return emailProperty().get(); }
public StringProperty emailProperty() {
if(email == null) {
email = new SimpleStringProperty(this, "email", "");
}
return email;
}
}
public static void main(String[] args) {
launch(args);
}
}
如果注释掉 table.scrollTo(),添加然后编辑行就可以正常工作。我尝试过 https://stackoverflow.com/a/27786741/3050379 但 isIndexVisible() 有时会返回 false,即使正在添加的行处于视图中。我已经尝试了我能想到的方法调用和可运行程序的顺序的每种组合,但都得到了相同的结果。如果有人可以帮助我,我将非常感激。
如果 edit() 未启动,请考虑修改 table.getSelectionModel().clearSelection() 的用法。当我向模型添加一个新的 TreeItem 并打算立即编辑它时,删除此调用在我的场景中被证明很有帮助。设置焦点和选择索引是必要的,但没有这个调用。为了确保正确排序,请记住事先调用clearSelection()。否则可能会导致排序后选择的索引不正确。然而,用它,edit()并没有按预期启动编辑模式。”