[英]Resize JavaFX table
我有一个简单的表格示例。
import javafx.application.Application;
import javafx.beans.property.SimpleStringProperty;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.event.EventHandler;
import javafx.geometry.Insets;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.control.TableCell;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableColumn.CellEditEvent;
import javafx.scene.control.TableView;
import javafx.scene.control.TextField;
import javafx.scene.control.cell.PropertyValueFactory;
import javafx.scene.layout.Priority;
import javafx.scene.layout.VBox;
import javafx.scene.text.Font;
import javafx.stage.Stage;
import javafx.util.Callback;
public class MainApp extends Application
{
private TableView<Person> table = new TableView<>();
private final ObservableList<Person> data
= FXCollections.observableArrayList(
new Person("Processor", "72"),
new Person("RAM", "78"),
new Person("HDD Free Space", "890"),
new Person("Lan Adapter NIC 1", "36"),
new Person("Lan Adapter NIC 2", "67"));
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(850);
//stage.setHeight(550);
final Label label = new Label("Address Book");
label.setFont(new Font("Arial", 20));
table.setEditable(false);
Callback<TableColumn, TableCell> cellFactory
= new Callback<TableColumn, TableCell>()
{
@Override
public TableCell call(TableColumn p)
{
return new EditingCell();
}
};
table.setColumnResizePolicy(TableView.CONSTRAINED_RESIZE_POLICY);
TableColumn firstNameCol = new TableColumn("Credentials");
//firstNameCol.setPrefWidth(300);
firstNameCol.setMinWidth(50);
//firstNameCol.prefWidthProperty().bind(table.widthProperty().divide(2)); // w * 1/2
firstNameCol.setCellValueFactory(new PropertyValueFactory<Person, String>("firstName"));
firstNameCol.setCellFactory(cellFactory);
firstNameCol.setOnEditCommit(
new EventHandler<CellEditEvent<Person, String>>()
{
@Override
public void handle(CellEditEvent<Person, String> t)
{
((Person) t.getTableView().getItems().get(
t.getTablePosition().getRow())).setFirstName(t.getNewValue());
}
}
);
TableColumn lastNameCol = new TableColumn("Value");
//lastNameCol.setPrefWidth(300);
lastNameCol.setMinWidth(50);
//lastNameCol.prefWidthProperty().bind(table.widthProperty().divide(2)); // w * 1/2
lastNameCol.setCellValueFactory(new PropertyValueFactory<Person, String>("lastName"));
lastNameCol.setCellFactory(cellFactory);
lastNameCol.setOnEditCommit(
new EventHandler<CellEditEvent<Person, String>>()
{
@Override
public void handle(CellEditEvent<Person, String> t)
{
((Person) t.getTableView().getItems().get(
t.getTablePosition().getRow())).setLastName(t.getNewValue());
}
}
);
table.setItems(data);
table.getColumns().addAll(firstNameCol, lastNameCol);
final VBox vbox = new VBox();
VBox.setVgrow(table, Priority.ALWAYS);
vbox.setSpacing(5);
vbox.setPadding(new Insets(10, 0, 0, 10));
vbox.getChildren().addAll(label, table);
((Group) scene.getRoot()).getChildren().addAll(vbox);
stage.setScene(scene);
stage.show();
}
public static class Person
{
private final SimpleStringProperty firstName;
private final SimpleStringProperty lastName;
private Person(String fName, String lName)
{
this.firstName = new SimpleStringProperty(fName);
this.lastName = new SimpleStringProperty(lName);
}
public String getFirstName()
{
return firstName.get();
}
public void setFirstName(String fName)
{
firstName.set(fName);
}
public String getLastName()
{
return lastName.get();
}
public void setLastName(String fName)
{
lastName.set(fName);
}
}
class EditingCell extends TableCell<Person, String>
{
private TextField textField;
public EditingCell()
{
}
@Override
public void startEdit()
{
if (!isEmpty())
{
super.startEdit();
createTextField();
setText(null);
setGraphic(textField);
textField.selectAll();
}
}
@Override
public void cancelEdit()
{
super.cancelEdit();
setText((String) getItem());
setGraphic(null);
}
@Override
public void updateItem(String item, boolean empty)
{
super.updateItem(item, empty);
if (empty)
{
setText(null);
setGraphic(null);
}
else
{
if (isEditing())
{
if (textField != null)
{
textField.setText(getString());
}
setText(null);
setGraphic(textField);
}
else
{
setText(getString());
setGraphic(null);
}
}
}
private void createTextField()
{
textField = new TextField(getString());
textField.setMinWidth(this.getWidth() - this.getGraphicTextGap() * 2);
textField.focusedProperty().addListener(new ChangeListener<Boolean>()
{
@Override
public void changed(ObservableValue<? extends Boolean> arg0,
Boolean arg1, Boolean arg2)
{
if (!arg2)
{
commitEdit(textField.getText());
}
}
});
}
private String getString()
{
return getItem() == null ? "" : getItem().toString();
}
}
}
当我调整窗口大小时,我希望调整桌面大小并适合主舞台。 我怎么能这样做?
PS我测试了添加table.setColumnResizePolicy(TableView.CONSTRAINED_RESIZE_POLICY);
但没有任何改变。
将vbox用作场景的根,并将表的vgrow约束设置为always。
示例代码:
Scene scene = new Scene(vbox);
vbox.setVgrow(table, Priority.ALWAYS);
如果您使用的是Scenebuilder,那么您可以轻松地将anchorpane(您的tableview所在的位置)锚定到两侧。 或者您可以在控制器中以编程方式设置它。
选择希望表格生长方向的边。
AnchorPane.setTopAnchor(<anchorpane>,0.0);
AnchorPane.setBottomAnchor(<anchorpane>,0.0);
AnchorPane.setLeftAnchor(<anchorpane>,0.0);
AnchorPane.setRightAnchor(<anchorpane>,0.0);
ColumnResizePolicy将仅根据您的tableview大小调整表列的大小。
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