我正在尝试制作 JavaFX Rows Unselectable
,NoFocusTraversable
但我没有这样做。下面是另一个问题的代码,你可以用它来玩。我添加了两条自定义线来制作一些行no focus traversable
。
虽然我无法制作某些行unselectable
,但有什么想法吗?
您将需要下载TomasMikula/EasyBind库(或注释上面的行并取消注释里面的底行RowFactory
)
代码来自(JavaFX:如何禁用 TableView 中的一行?) StackOverflow 答案:
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Random;
import java.util.function.Function;
import javafx.application.Application;
import javafx.beans.binding.Bindings;
import javafx.beans.property.IntegerProperty;
import javafx.beans.property.ReadOnlyObjectWrapper;
import javafx.beans.property.SimpleIntegerProperty;
import javafx.beans.property.SimpleStringProperty;
import javafx.beans.property.StringProperty;
import javafx.beans.value.ObservableValue;
import javafx.collections.ObservableList;
import javafx.scene.Node;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.ContentDisplay;
import javafx.scene.control.TableCell;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableRow;
import javafx.scene.control.TableView;
import javafx.scene.layout.BorderPane;
import javafx.stage.Stage;
import org.fxmisc.easybind.EasyBind;
public class DisabledTableRowExample extends Application {
@Override
public void start(Stage primaryStage) {
TableView<Item> table = new TableView<>();
table.getItems().addAll(createData());
TableColumn<Item, Item> deleteCol = createTableColumn("Delete", ReadOnlyObjectWrapper<Item>::new);
deleteCol.setCellFactory(this::createDeleteCell);
table.getColumns().addAll(Arrays.asList(
createTableColumn("Name", Item::nameProperty),
createTableColumn("Value", Item::valueProperty),
deleteCol
));
// A row factory that returns a row that disables itself whenever the
// item it displays has a value less than 5:
table.setRowFactory(tv -> {
TableRow<Item> row = new TableRow<>();
// use EasyBind to access the valueProperty of the itemProperty of the cell:
row.disableProperty().bind(
EasyBind.select(row.itemProperty()) // start at itemProperty of row
.selectObject(Item::valueProperty) // map to valueProperty of item, if item non-null
.map(x -> x.intValue() < 5) // map to BooleanBinding via intValue of value < 5
.orElse(false)); // value to use if item was null
row.setFocusTraversable(false); //here
row.setEditable(false); //here
// it's also possible to do this with the standard API, but there are lots of
// superfluous warnings sent to standard out:
// row.disableProperty().bind(
// Bindings.selectInteger(row.itemProperty(), "value")
// .lessThan(5));
return row ;
});
BorderPane root = new BorderPane(table);
Scene scene = new Scene(root, 600, 400);
primaryStage.setScene(scene);
primaryStage.show();
}
private List<Item> createData() {
Random rng = new Random();
List<Item> data = new ArrayList<>();
for (int i=1; i<=20; i++) {
data.add(new Item("Item "+i, rng.nextInt(10)));
}
return data ;
}
private <S,T> TableColumn<S, T> createTableColumn(String name, Function<S, ObservableValue<T>> propertyMapper) {
TableColumn<S,T> col = new TableColumn<>(name);
col.setCellValueFactory(cellData -> propertyMapper.apply(cellData.getValue()));
return col ;
}
private TableCell<Item, Item> createDeleteCell(TableColumn<Item, Item> col) {
ObservableList<Item> itemList = col.getTableView().getItems();
TableCell<Item, Item> cell = new TableCell<>();
cell.setContentDisplay(ContentDisplay.GRAPHIC_ONLY);
Button button = new Button("Delete");
button.setOnAction(event -> itemList.remove(cell.getItem()));
cell.graphicProperty().bind(Bindings.when(cell.emptyProperty()).then((Node)null).otherwise(button));
return cell ;
}
/**
* Item class here
*/
public static class Item {
private final StringProperty name = new SimpleStringProperty(this, "name");
private final IntegerProperty value = new SimpleIntegerProperty(this, "value");
public final StringProperty nameProperty() {
return this.name;
}
public final java.lang.String getName() {
return this.nameProperty().get();
}
public final void setName(final java.lang.String name) {
this.nameProperty().set(name);
}
public final IntegerProperty valueProperty() {
return this.value;
}
public final int getValue() {
return this.valueProperty().get();
}
public final void setValue(final int value) {
this.valueProperty().set(value);
}
public Item(String name, int value) {
setName(name);
setValue(value);
}
}
public static void main(String[] args) {
launch(args);
}
}