我想在我的tablview单元格中嵌入一个按钮。到目前为止，我已经覆盖了表格单元格，并且能够在表格视图中反映出一个按钮。但问题是我想在不同的列中使用不同的按钮名称。基本上表中的数据是动态添加的。我试图动态更改单元格工厂，但正如预期的那样，它反映了所有单元格的变化。对此的任何线索都将不胜感激。
代码：
import java.util.Random;
import javafx.application.Application;
import javafx.beans.property.SimpleBooleanProperty;
import javafx.beans.property.SimpleIntegerProperty;
import javafx.beans.value.ObservableValue;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.chart.XYChart;
import javafx.scene.control.Button;
import javafx.scene.control.ContentDisplay;
import javafx.scene.control.TableCell;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;
import javafx.scene.control.TextField;
import javafx.scene.control.cell.PropertyValueFactory;
import javafx.scene.input.KeyCode;
import javafx.scene.input.KeyEvent;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;
import javafx.util.Callback;
/**
* @web http://java-buddy.blogspot.com/
*/
public class JavaFXDynTable extends Application {
private TableView tableView = new TableView();
private Button btnNew = new Button("New Record");
static Random random = new Random();
public static int i=0;
private TableColumn col_action;
static final String Day[] = {
"Monday",
"Tuesday",
"Wednesday",
"Thursday",
"Friday"};
public static class Record {
private final SimpleIntegerProperty id;
private final SimpleIntegerProperty value_0;
private final SimpleIntegerProperty value_1;
private final SimpleIntegerProperty value_2;
private final SimpleIntegerProperty value_3;
private final SimpleIntegerProperty value_4;
Record(int i, int v0, int v1, int v2, int v3,
int v4) {
this.id = new SimpleIntegerProperty(i);
this.value_0 = new SimpleIntegerProperty(v0);
this.value_1 = new SimpleIntegerProperty(v1);
this.value_2 = new SimpleIntegerProperty(v2);
this.value_3 = new SimpleIntegerProperty(v3);
this.value_4 = new SimpleIntegerProperty(v4);
}
public int getId() {
return id.get();
}
public void setId(int v) {
id.set(v);
}
public int getValue_0() {
return value_0.get();
}
public void setValue_0(int v) {
value_0.set(v);
}
public int getValue_1() {
return value_1.get();
}
public void setValue_1(int v) {
value_1.set(v);
}
public int getValue_2() {
return value_2.get();
}
public void setValue_2(int v) {
value_2.set(v);
}
public int getValue_3() {
return value_3.get();
}
public void setValue_3(int v) {
value_3.set(v);
}
public int getValue_4() {
return value_4.get();
}
public void setValue_4(int v) {
value_4.set(v);
}
};
ObservableList<Record> data = FXCollections.observableArrayList();
@Override
public void start(Stage primaryStage) {
primaryStage.setTitle("java-buddy.blogspot.com");
tableView.setEditable(true);
Callback<TableColumn, TableCell> cellFactory =
new Callback<TableColumn, TableCell>() {
@Override
public TableCell call(TableColumn p) {
return new EditingCell();
}
};
btnNew.setOnAction(btnNewHandler);
//init table
//Un-editable column of "id"
TableColumn col_id = new TableColumn("ID");
tableView.getColumns().add(col_id);
col_id.setCellValueFactory(
new PropertyValueFactory<Record, String>("id"));
//Editable columns
for(int i=0; i<Day.length; i++){
TableColumn col = new TableColumn(Day[i]);
col.setCellValueFactory(
new PropertyValueFactory<Record, String>(
"value_" + String.valueOf(i)));
tableView.getColumns().add(col);
col.setCellFactory(cellFactory);
}
//Insert Button
col_action = new TableColumn<>("Action");
col_action.setSortable(false);
col_action.setCellValueFactory(
new Callback<TableColumn.CellDataFeatures<Record, Boolean>,
ObservableValue<Boolean>>() {
@Override
public ObservableValue<Boolean> call(TableColumn.CellDataFeatures<Record, Boolean> p) {
return new SimpleBooleanProperty(p.getValue() != null);
}
});
col_action.setCellFactory(
new Callback<TableColumn<Record, Boolean>, TableCell<Record, Boolean>>() {
@Override
public TableCell<Record, Boolean> call(TableColumn<Record, Boolean> p) {
return new ButtonCell("JJJJJ");
}
});
tableView.getColumns().add(col_action);
tableView.setItems(data);
Group root = new Group();
VBox vBox = new VBox();
vBox.setSpacing(10);
vBox.getChildren().addAll(btnNew, tableView);
root.getChildren().add(vBox);
primaryStage.setScene(new Scene(root, 600, 400));
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
//Define the button cell
private class ButtonCell extends TableCell<Record, Boolean> {
private Button cellButton;
ButtonCell(String text){
cellButton = new Button("Action");
cellButton.setText(text);
cellButton.setOnAction(new EventHandler<ActionEvent>(){
@Override
public void handle(ActionEvent t) {
// do something when button clicked
//...
}
});
}
//Display button if the row is not empty
@Override
protected void updateItem(Boolean t, boolean empty) {
super.updateItem(t, empty);
if(!empty){
setGraphic(cellButton);
}
}
}
EventHandler<ActionEvent> btnNewHandler =
new EventHandler<ActionEvent>(){
@Override
public void handle(ActionEvent t) {
//generate new Record with random number
int newId = data.size();
if (i%2==0) {
col_action.setCellFactory(
new Callback<TableColumn<Record, Boolean>, TableCell<Record, Boolean>>() {
@Override
public TableCell<Record, Boolean> call(TableColumn<Record, Boolean> p) {
return new ButtonCell("JJJJJ");
}
});
}
else
{
col_action.setCellFactory(
new Callback<TableColumn<Record, Boolean>, TableCell<Record, Boolean>>() {
@Override
public TableCell<Record, Boolean> call(TableColumn<Record, Boolean> p) {
return new ButtonCell("jakao");
}
});
}
i++;
Record newRec = new Record(
newId,
random.nextInt(100),
random.nextInt(100),
random.nextInt(100),
random.nextInt(100),
random.nextInt(100));
data.add(newRec);
}
};
class EditingCell extends TableCell<XYChart.Data, Number> {
private TextField textField;
public EditingCell() {}
@Override
public void startEdit() {
super.startEdit();
if (textField == null) {
createTextField();
}
setGraphic(textField);
setContentDisplay(ContentDisplay.GRAPHIC_ONLY);
textField.selectAll();
}
@Override
public void cancelEdit() {
super.cancelEdit();
setText(String.valueOf(getItem()));
setContentDisplay(ContentDisplay.TEXT_ONLY);
}
@Override
public void updateItem(Number item, boolean empty) {
super.updateItem(item, empty);
if (empty) {
setText(null);
setGraphic(null);
} else {
if (isEditing()) {
if (textField != null) {
textField.setText(getString());
}
setGraphic(textField);
setContentDisplay(ContentDisplay.GRAPHIC_ONLY);
} else {
setText(getString());
setContentDisplay(ContentDisplay.TEXT_ONLY);
}
}
}
private void createTextField() {
textField = new TextField(getString());
textField.setMinWidth(this.getWidth() - this.getGraphicTextGap()*2);
textField.setOnKeyPressed(new EventHandler<KeyEvent>() {
@Override
public void handle(KeyEvent t) {
if (t.getCode() == KeyCode.ENTER) {
commitEdit(Integer.parseInt(textField.getText()));
} else if (t.getCode() == KeyCode.ESCAPE) {
cancelEdit();
}
}
});
}
private String getString() {
return getItem() == null ? "" : getItem().toString();
}
}
}
答案 0 :(得分：3)
在ButtonCell课程中，您可以这样做：
ButtonCell(String text){
cellButton = new Button();
cellButton.setOnAction(new EventHandler<ActionEvent>(){
@Override
public void handle(ActionEvent t) {
// do something when button clicked
Record record = (Record) getTableRow().getItem();
// do something dependent on record....
}
});
}
//Display button if the row is not empty
@Override
protected void updateItem(Boolean t, boolean empty) {
super.updateItem(t, empty);
if(!empty){
final Record record = (Record)getTableRow().getItem();
cellButton.setText("Do something with "+record.getId());
setGraphic(cellButton);
} else { // you must always do the following in cell subclasses:
setGraphic(null);
}
}
构建它的方式略有不同：
而不是让col_action成为TableColumn<Record, Boolean>，您可以将其设为TableColumn<Record, Record>并执行
col_action = new TableColumn<>("Action");
col_action.setCellValueFactory(
new Callback<TableColumn.CellDataFeatures<Record, Record>,
ObservableValue<Record>>() {
@Override
public ObservableValue<Boolean> call(TableColumn.CellDataFeatures<Record, Record> p) {
return new ReadOnlyObjectWrapper<Record>(p.getValue());
}
});
col_action.setCellFactory(
new Callback<TableColumn<Record, Record>, TableCell<Record, Record>>() {
@Override
public TableCell<Record, Record> call(TableColumn<Record, Record> p) {
return new ButtonCell();
}
});
然后ButtonCell将是
private class ButtonCell extends TableCell<Record, Record> {
private Button cellButton;
ButtonCell(){
cellButton = new Button();
cellButton.setOnAction(new EventHandler<ActionEvent>(){
@Override
public void handle(ActionEvent t) {
// do something when button clicked
Record record = getItem();
// do something with record....
}
});
}
//Display button if the row is not empty
@Override
protected void updateItem(Record record, boolean empty) {
super.updateItem(record, empty);
if(!empty){
cellButton.setText("Something with "+record.getId());
setGraphic(cellButton);
} else {
setGraphic(null);
}
}
}