列表中的javafx表视图数据
列表中的javafx表视图数据
提问于 2017-09-12 16:11:06
我对JavaFX中的TableView有问题。
从定义了所有字段的现有类创建表很容易。
但是我想知道是否有可能制作表格并从列表中添加数据？
我做了这样的东西，但它有点不起作用。
@FXML
private TableView<List<String>> testTable;
....
List<String> list = new ArrayList<>();
list.add("1hello");
list.add("1hello2");
List<String> list2 = new ArrayList<>();
list2.add("2hello");
list2.add("2hello2");
ObservableList<List<String>> lists = FXCollections.observableArrayList();
lists.add(list);
lists.add(list2);
TableColumn<List<String>, String> coll = new TableColumn<>("one");
coll.setCellValueFactory(new PropertyValueFactory<List<String>,String>(""));
TableColumn<List<String>, String> coll2 = new TableColumn<>("two");
coll2.setCellValueFactory(new PropertyValueFactory<List<String>,String>(""));
testTable.getColumns().add(coll);
testTable.getColumns().add(coll2);
lists.forEach(li -> {
System.out.println("list: " + li);
testTable.getItems().add(li);
}); 它没有插入任何数据。这样的事情有可能发生吗？
回答 1
Stack Overflow用户
发布于 2018-07-24 03:55:47
作为我工作的一小部分，我需要一个从列表中动态填充数据的TableView。我查看了StackOverflow中的其他一些示例，还查看了Oracle教程。但没有一种能满足我的需求。
为了满足我的需要，我把不同的解决方案弄得一团糟。请参阅下面的工作示例。
import java.util.ArrayList;
import javafx.util.Callback;
import javafx.util.StringConverter;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.geometry.Insets;
import javafx.scene.paint.Color;
import javafx.scene.text.Font;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.canvas.Canvas;
import javafx.scene.canvas.GraphicsContext;
import javafx.scene.control.Label;
import javafx.scene.control.TableCell;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;
import javafx.scene.control.cell.TextFieldTableCell;
import javafx.beans.property.SimpleObjectProperty;
import javafx.beans.property.SimpleStringProperty;
import javafx.beans.value.ObservableValue;
import javafx.scene.layout.Pane;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;
import javafx.application.Application;
/**
*
* @author Rob
*/
public class TableViewSample extends Application {
public static void main(String[] args) {
launch(args);
}
@Override
public void start(Stage stage) {
Scene scene = new Scene(new Group());
stage.setTitle("Table View Sample");
stage.setWidth(400);
stage.setHeight(500);
final Label label = new Label("Student IDs");
label.setFont(new Font("Arial", 20));
TableView tableView = new TableView<>();
tableView.setEditable(true);
tableView.getSelectionModel().setCellSelectionEnabled(true);
ObservableList<TableColumn> tableViewColumns = generateTableViewColumns();
tableView.getColumns().setAll(tableViewColumns);
ObservableList<TableColumn> tcs = tableView.getColumns();
for (int i = 0; i < tcs.size(); i++) {
TableColumn tc = tcs.get(i);
if (i == 0) {
Callback<TableColumn.CellDataFeatures<ArrayList, Color>, ObservableValue<Color>> cellValueFactory = buildCallbackColor(i);
tc.setCellValueFactory(cellValueFactory);
} else {
Callback<TableColumn.CellDataFeatures<ArrayList, String>, ObservableValue<String>> cellValueFactory = buildCallbackString(i);
tc.setCellValueFactory(cellValueFactory);
}
}
ObservableList<ArrayList> tableViewRows = generateTableViewRows();
tableView.getItems().setAll(tableViewRows);
for (int i = 0; i < tcs.size(); i++) {
TableColumn dataColumn = tcs.get(i);
if (i == 0) {
Callback<TableColumn<ArrayList, Color>, TableCell<ArrayList, Color>> cellFactoryPane = buildCallbackPane();
dataColumn.setCellFactory(cellFactoryPane);
} else {
Callback<TableColumn<ArrayList, String>, TableCell<ArrayList, String>> cellFactoryTextFieldTableCell = buildCallbackTextFieldTableCell();
dataColumn.setCellFactory(cellFactoryTextFieldTableCell);
}
}
final VBox vbox = new VBox();
vbox.setSpacing(5);
vbox.setPadding(new Insets(10, 0, 0, 10));
vbox.getChildren().addAll(label, tableView);
((Group) scene.getRoot()).getChildren().addAll(vbox);
stage.setScene(scene);
stage.show();
}
private ObservableList<TableColumn> generateTableViewColumns() {
ObservableList<TableColumn> tableViewColumns = FXCollections.observableArrayList();
TableColumn firstDataColumn = new TableColumn<>("Activity");
TableColumn secondDataColumn = new TableColumn<>("Class A");
TableColumn thirdDataColumn = new TableColumn<>("Class B");
firstDataColumn.setMinWidth(80);
secondDataColumn.setMinWidth(130);
thirdDataColumn.setMinWidth(130);
tableViewColumns.add(firstDataColumn);
tableViewColumns.add(secondDataColumn);
tableViewColumns.add(thirdDataColumn);
return tableViewColumns;
}
private ObservableList<ArrayList> generateTableViewRows() {
int max = 6;
ObservableList<ArrayList> tableViewRows = FXCollections.observableArrayList();
for (int i = 1; i < max; i++) {
ArrayList dataRow = new ArrayList<>();
Color value1 = Color.GREEN;
String value2 = "A" + i;
String value3 = "B" + i;
dataRow.add(value1);
dataRow.add(value2);
dataRow.add(value3);
tableViewRows.add(dataRow);
}
return tableViewRows;
}
private Callback<TableColumn.CellDataFeatures<ArrayList, Color>, ObservableValue<Color>> buildCallbackColor(int index) {
Callback<TableColumn.CellDataFeatures<ArrayList, Color>, ObservableValue<Color>> cellValueFactory = new Callback<TableColumn.CellDataFeatures<ArrayList, Color>, ObservableValue<Color>>() {
@Override
public ObservableValue<Color> call(TableColumn.CellDataFeatures<ArrayList, Color> param) {
return new SimpleObjectProperty(param.getValue().get(index));
}
};
return cellValueFactory;
}
private Callback<TableColumn.CellDataFeatures<ArrayList, String>, ObservableValue<String>> buildCallbackString(int index) {
Callback<TableColumn.CellDataFeatures<ArrayList, String>, ObservableValue<String>> cellValueFactory = new Callback<TableColumn.CellDataFeatures<ArrayList, String>, ObservableValue<String>>() {
@Override
public ObservableValue<String> call(TableColumn.CellDataFeatures<ArrayList, String> param) {
return new SimpleStringProperty((String) param.getValue().get(index));
}
};
return cellValueFactory;
}
private Callback<TableColumn<ArrayList, Color>, TableCell<ArrayList, Color>> buildCallbackPane() {
Callback<TableColumn<ArrayList, Color>, TableCell<ArrayList, Color>> cellFactory = new Callback<TableColumn<ArrayList, Color>, TableCell<ArrayList, Color>>() {
@Override
public TableCell call(TableColumn tableColumn) {
double cellWidth = tableColumn.getMinWidth();
double cellHeight = 35;
TableCell tableCell = new TableCell<Object, Color>() {
@Override
protected void updateItem(Color item, boolean empty) {
super.updateItem(item, empty);
if (empty) {
setText(null);
setGraphic(null);
} else {
Pane p = new Pane();
p.setPrefSize(cellWidth, cellHeight);
Canvas canvasRectLayerColor = new Canvas();
p.getChildren().add(canvasRectLayerColor);
canvasRectLayerColor.setWidth(20);
canvasRectLayerColor.setHeight(20);
GraphicsContext gc = canvasRectLayerColor.getGraphicsContext2D();
gc.setFill(item);
gc.fillRect(0, 0, canvasRectLayerColor.getWidth(), canvasRectLayerColor.getHeight());
setGraphic(p);
}
}
};
return tableCell;
}
};
return cellFactory;
}
private Callback<TableColumn<ArrayList, String>, TableCell<ArrayList, String>> buildCallbackTextFieldTableCell() {
Callback<TableColumn<ArrayList, String>, TableCell<ArrayList, String>> cellFactory = new Callback<TableColumn<ArrayList, String>, TableCell<ArrayList, String>>() {
@Override
public TableCell call(TableColumn tc) {
TextFieldTableCell tftc = new TextFieldTableCell(new StringConverter() {
@Override
public String toString(Object t) {
return t.toString();
}
@Override
public Object fromString(String string) {
return string;
}
});
return tftc;
}
};
return cellFactory;
}
}希望这篇文章能帮上忙，即使已经很晚了。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/46171183
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