我有一个TableCell，在编辑时将日期显示为DatePicker，在不编辑时将日期显示为纯文本。
编辑TableCell时，DatePicker应该获得焦点，应该选择其日期，并且光标应该在该日期的结尾处在编辑器中。 DatePicker的编辑器应准备就绪，可以接受用户输入。
但是，目前，当单元格被编辑时，DatePicker获得了焦点，但是它（或其编辑器？）却没有响应。未选择日期，光标也看不到。我无法单击编辑器，也无法在编辑器中输入任何内容。唯一有效的是显示日历弹出窗口的按钮。
此外，该仅在第一次DatePicker单元格在给定行中进行编辑时发生。下次编辑同一行中的同一单元格时，它可以正常工作。
如果我将setContentDisplay()中的updateItem()更改为GRAPHIC_ONLY，但我也不想这样做，也可以。
下面是演示该问题的MVCE。
要重现该行为，请双击日期单元格，或使用箭头键导航到该单元格并按F2。 DatePicker将成为焦点，但不会选择其日期，因此您将无法单击DatePicker的编辑器。
现在单击日期单元格之外的任何位置，然后返回到同一行中的同一单元格并再次进行编辑。然后应该选择日期，并且您应该能够单击或键入编辑器。
我在做什么错了？
我已经Google搜索并在DatePicker中找到了TableView的示例，但是所有设置的内容在updateItem()中都显示为GRAPHIC_ONLY。除了编辑时，我找不到使用TEXT_ONLY的任何内容。
我正在使用Windows 7的Netbeans 11.0中运行的OpenJDK和OpenJFX的11.0.2版本。
package test016;
import java.time.LocalDate;
import java.time.format.DateTimeFormatter;
import java.util.Arrays;
import javafx.application.Application;
import static javafx.application.Application.launch;
import javafx.beans.property.ObjectProperty;
import javafx.beans.property.SimpleObjectProperty;
import javafx.beans.property.SimpleStringProperty;
import javafx.beans.property.StringProperty;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.ContentDisplay;
import javafx.scene.control.DatePicker;
import javafx.scene.control.TableCell;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;
import javafx.scene.control.cell.TextFieldTableCell;
import javafx.scene.layout.BorderPane;
import javafx.stage.Stage;
import javafx.util.StringConverter;
import javafx.util.converter.DefaultStringConverter;
public class Test016 extends Application {
private final ObservableList<DataModel> ol = FXCollections.observableArrayList();
private final TableView<DataModel> tv = new TableView();
private Parent createContent() {
loadDummyData();
createTableViewColumns();
tv.getSelectionModel().setCellSelectionEnabled(true);
tv.setEditable(true);
tv.setItems(ol);
tv.getSelectionModel().selectFirst();
BorderPane content = new BorderPane();
content.setCenter(tv);
return content;
}
private void createTableViewColumns() {
TableColumn<DataModel,String> col1 = new TableColumn<>("field1");
TableColumn<DataModel,LocalDate> col2 = new TableColumn<>("field2");
TableColumn<DataModel,String> col3 = new TableColumn<>("field3");
col1.setCellValueFactory(cellData -> cellData.getValue().field1Property());
col1.setCellFactory(TextFieldTableCell.<DataModel, String>forTableColumn(new DefaultStringConverter()));
col2.setCellValueFactory(cellData -> cellData.getValue().field2Property());
//**************************************************************
//DatePicker TableCell begins here
col2.setCellFactory(dp -> {
DatePicker datePicker = new DatePicker();
StringConverter<LocalDate> dateConverter = new StringConverter<LocalDate>() {
@Override
public String toString(LocalDate object) {
DateTimeFormatter dateFormatter = DateTimeFormatter.ofPattern("d/MM/yyyy");
return ( object == null ? "" : dateFormatter.format(object) );
}
@Override
public LocalDate fromString(String string) {
DateTimeFormatter dateFormatter = DateTimeFormatter.ofPattern("d/MM/yyyy");
return string.isEmpty() ? null : LocalDate.parse(string, dateFormatter);
}
};
datePicker.setConverter(dateConverter);
datePicker.setEditable(true);
datePicker.setDisable(false);
TableCell<DataModel, LocalDate> cell = new TableCell<>() {
@Override
protected void updateItem(LocalDate item, boolean empty) {
super.updateItem(item, empty);
if (empty) {
setText(null);
setGraphic(null);
} else {
//It works I set content display to GRAPHIC_ONLY
setContentDisplay(ContentDisplay.TEXT_ONLY);
//setContentDisplay(ContentDisplay.GRAPHIC_ONLY);
setText(dateConverter.toString(item));
datePicker.setValue((LocalDate) item);
setGraphic(datePicker);
}
}
@Override
public void startEdit() {
super.startEdit();
if ( getGraphic() != null && getGraphic() instanceof DatePicker ) {
//The problem only occurs when I set content display to TEXT_ONLY in updateItem().
setContentDisplay(ContentDisplay.GRAPHIC_ONLY);
//If I requestFocus() on the graphic, the DatePicker gets the focus but I cannot edit the date
//by clicking in the editor and typing something in.
//If I do NOT requestFocus() on the graphic, the cell containing the DatePicker gets focus but
//I can then click in the DatePicker's editor and type something in. However, I cannot just
//start typing as the DatePicker doesn't have focus.
//This happens irrespective of whether I double-click on a cell to start the edit or
//navigate to the cell via the keyboard and then hit F2.
//The behaviour only appears the first time I edit a DatePicker in a given row.
//The second and subsequent edits for the same row work fine.
getGraphic().requestFocus();
//Requesting focus on the DatePicker's editor doesn't appear to have any effect, either with or
//without first requesting focus on the graphic.
( (DatePicker) getGraphic() ).getEditor().requestFocus();
( (DatePicker) getGraphic() ).getEditor().selectAll();
}
}
@Override
public void cancelEdit() {
super.cancelEdit();
setContentDisplay(ContentDisplay.TEXT_ONLY);
}
};
return cell;
});
//**************************************************************
col2.setPrefWidth(120);
col3.setCellValueFactory(cellData -> cellData.getValue().field3Property());
col3.setCellFactory(TextFieldTableCell.<DataModel, String>forTableColumn(new DefaultStringConverter()));
tv.getColumns().addAll(Arrays.asList(col1, col2, col3));
}
private void loadDummyData() {
ol.add(new DataModel("1", LocalDate.parse("2001-01-01"), "x"));
ol.add(new DataModel("2", LocalDate.parse("2001-01-01"), "x"));
ol.add(new DataModel("3", LocalDate.parse("2001-01-01"), "x"));
ol.add(new DataModel("4", LocalDate.parse("2001-01-01"), "x"));
ol.add(new DataModel("5", LocalDate.parse("2001-01-01"), "x"));
}
private class DataModel {
private final StringProperty field1;
private final ObjectProperty<LocalDate> field2;
private final StringProperty field3;
public DataModel(
String field1,
LocalDate field2,
String field3
) {
this.field1 = new SimpleStringProperty(field1);
this.field2 = new SimpleObjectProperty<>(field2);
this.field3 = new SimpleStringProperty(field3);
}
public String getField1() {return field1.get().trim();}
public void setField1(String field1) {this.field1.set(field1);}
public StringProperty field1Property() {return field1;}
public LocalDate getField2() {return field2.get();}
public void setField2(LocalDate field2) {this.field2.set(field2);}
public ObjectProperty<LocalDate> field2Property() {return field2;}
public String getField3() {return field3.get().trim();}
public void setField3(String field3) {this.field3.set(field3);}
public StringProperty field3Property() {return field3;}
}
@Override
public void start(Stage stage) throws Exception {
stage.setScene(new Scene(createContent()));
stage.setTitle("OpenJFX11 - DatePicker in TableView");
stage.setWidth(600D);
stage.setHeight(600D);
stage.show();
}
public static void main(String[] args) {
launch(args);
}
}
答案 0 :(得分：2)
由于Slaw的建议，解决不响应问题的一种方法是在设置为图形但在之前的applyCss() 之后调用DatePicker > requestFocus()和selectAll()。
虽然selectAll()仍仅对同一行中同一单元格的第二次编辑生效，但DatePicker至少现在会响应编辑。
@Override
public void startEdit() {
super.startEdit();
if ( getGraphic() != null && getGraphic() instanceof DatePicker ) {
setContentDisplay(ContentDisplay.GRAPHIC_ONLY);
( (DatePicker) getGraphic() ).applyCss(); //Workaround for the unresponsiveness issue.
getGraphic().requestFocus();
( (DatePicker) getGraphic() ).getEditor().requestFocus();
( (DatePicker) getGraphic() ).getEditor().selectAll();
}
}