我在tableView中将布尔表示形式实现为复选框。通常,它可以正常工作,但非常令人烦恼的事实是,它要求将行聚焦(编辑)以应用复选框值的更改。这意味着我首先必须双击该字段,然后单击复选框。
如何使复选框更改立即在onEditCommit上执行?
public class BooleanCell<T> extends TableCell<T, Boolean> {
private CheckBox checkBox;
public BooleanCell() {
checkBox = new CheckBox();
checkBox.selectedProperty().addListener(new ChangeListener<Boolean>() {
public void changed(ObservableValue<? extends Boolean> observable, Boolean oldValue, Boolean newValue) {
if (isEditing())
commitEdit(newValue == null ? false : newValue);
}
});
setAlignment(Pos.CENTER);
this.setContentDisplay(ContentDisplay.GRAPHIC_ONLY);
this.setEditable(true);
}
@Override
public void updateItem(Boolean item, boolean empty) {
super.updateItem(item, empty);
if (empty) {
setGraphic(null);
} else {
checkBox.setSelected(item);
setGraphic(checkBox);
}
}
}
答案 0 :(得分:1)
我不确定其余的实现,但是我假设您没有将TableView
设置为可编辑:
tableView.setEditable(true);
附带说明,您可以轻松地使用CheckBoxTableCell
而不是自己实现(BooleanCell
)。
这是一个非常简单的应用程序,您可以运行该应用程序以查看其工作原理。可以单击每个CheckBox
,而无需先关注该行,它的值也会更新您的基础模型(您可以通过单击“打印列表”按钮来看到它)。
import javafx.application.Application;
import javafx.beans.property.BooleanProperty;
import javafx.beans.property.SimpleBooleanProperty;
import javafx.beans.property.SimpleStringProperty;
import javafx.beans.property.StringProperty;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;
import javafx.scene.control.cell.CheckBoxTableCell;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;
public class CheckBoxTableViewSample extends Application {
public static void main(String[] args) {
launch(args);
}
@Override
public void start(Stage primaryStage) {
// Simple interface
VBox root = new VBox(5);
root.setPadding(new Insets(10));
root.setAlignment(Pos.CENTER);
// List of sample items
ObservableList<MyItem> myItems = FXCollections.observableArrayList();
myItems.addAll(
new MyItem(false, "Item 1"),
new MyItem(false, "Item 2"),
new MyItem(true, "Item 3"),
new MyItem(false, "Item 4"),
new MyItem(false, "Item 5")
);
// Create TableView
TableView<MyItem> tableView = new TableView<MyItem>();
// We need the TableView to be editable in order to allow each CheckBox to be selectable
tableView.setEditable(true);
// Create our table Columns
TableColumn<MyItem, Boolean> colSelected = new TableColumn<>("Selected");
TableColumn<MyItem, String> colName = new TableColumn<>("Name");
// Bind the columns with our model's properties
colSelected.setCellValueFactory(f -> f.getValue().selectedProperty());
colName.setCellValueFactory(f -> f.getValue().nameProperty());
// Set the CellFactory to use a CheckBoxTableCell
colSelected.setCellFactory(param -> {
return new CheckBoxTableCell<MyItem, Boolean>();
});
// Add our columns to the TableView
tableView.getColumns().addAll(colSelected, colName);
// Set our items to the TableView
tableView.setItems(myItems);
// Create a button to print out our list of items
Button btnPrint = new Button("Print List");
btnPrint.setOnAction(event -> {
System.out.println("-------------");
for (MyItem item : myItems) {
System.out.println(item.getName() + " = " + item.isSelected());
}
});
root.getChildren().addAll(tableView, btnPrint);
// Show the Stage
primaryStage.setScene(new Scene(root));
primaryStage.show();
}
}
/**
* Just a simple sample class to display in our TableView
*/
final class MyItem {
// This property will be bound to the CheckBoxTableCell
private final BooleanProperty selected = new SimpleBooleanProperty();
// The name of our Item
private final StringProperty name = new SimpleStringProperty();
public MyItem(boolean selected, String name) {
this.selected.setValue(selected);
this.name.set(name);
}
public boolean isSelected() {
return selected.get();
}
public BooleanProperty selectedProperty() {
return selected;
}
public void setSelected(boolean selected) {
this.selected.set(selected);
}
public String getName() {
return name.get();
}
public StringProperty nameProperty() {
return name;
}
public void setName(String name) {
this.name.set(name);
}
}