A DraggablePanelsExample.java
有关描述，请参见使用事件过滤器。
法律条款和版权声明
/* * 版权所有 (c) 2012, 2014, Oracle及其附属公司。 * 保留所有权利。使用受许可条款约束。 * * 此文件可在以下许可下使用和许可： * * 源代码的重新发布和使用，无论是否进行修改，只要满足以下条件： * * - 必须保留上述版权声明、此条件列表和以下免责声明。 * - 以二进制形式重新发布的代码必须在文档和/或其他提供的材料中复制上述版权声明、此条件列表和以下免责声明。 * - 未经特定事先书面许可，不得使用Oracle或其贡献者的名称来认可或推广从本软件派生的产品。 * * 本软件由版权持有人和贡献者“按原样”提供，不提供任何明示或暗示的保证，包括但不限于适销性和适用于特定目的的保证。 * 在任何情况下，版权所有者或贡献者均不对任何直接、间接、偶然、特殊、惩罚性或后果性损害（包括但不限于替代商品或服务的采购、使用损失、数据或利润损失、业务中断等）承担任何责任，无论是合同责任、严格责任还是侵权行为（包括疏忽或其他）。 */
代码
package draggablepanelsexample;
import javafx.application.Application;
import javafx.beans.binding.Bindings;
import javafx.beans.property.BooleanProperty;
import javafx.beans.property.SimpleBooleanProperty;
import javafx.collections.FXCollections;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Group;
import javafx.scene.Node;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.CheckBox;
import javafx.scene.control.ChoiceBox;
import javafx.scene.control.Label;
import javafx.scene.control.PasswordField;
import javafx.scene.control.ProgressIndicator;
import javafx.scene.control.RadioButton;
import javafx.scene.control.Slider;
import javafx.scene.control.TextField;
import javafx.scene.control.ToggleGroup;
import javafx.scene.control.Tooltip;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.HBox;
import javafx.scene.layout.Pane;
import javafx.scene.layout.Region;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;
public final class DraggablePanelsExample extends Application {
private final BooleanProperty dragModeActiveProperty =
new SimpleBooleanProperty(this, "dragModeActive", true);
@Override
public void start(final Stage stage) {
final Node loginPanel =
makeDraggable(createLoginPanel());
final Node confirmationPanel =
makeDraggable(createConfirmationPanel());
final Node progressPanel =
makeDraggable(createProgressPanel());
loginPanel.relocate(0, 0);
confirmationPanel.relocate(0, 67);
progressPanel.relocate(0, 106);
final Pane panelsPane = new Pane();
panelsPane.getChildren().addAll(loginPanel,
confirmationPanel,
progressPanel);
final BorderPane sceneRoot = new BorderPane();
BorderPane.setAlignment(panelsPane, Pos.TOP_LEFT);
sceneRoot.setCenter(panelsPane);
final CheckBox dragModeCheckbox = new CheckBox("Drag mode");
BorderPane.setMargin(dragModeCheckbox, new Insets(6));
sceneRoot.setBottom(dragModeCheckbox);
dragModeActiveProperty.bind(dragModeCheckbox.selectedProperty());
final Scene scene = new Scene(sceneRoot, 400, 300);
stage.setScene(scene);
stage.setTitle("Draggable Panels Example");
stage.show();
}
public static void main(final String[] args) {
launch(args);
}
private Node makeDraggable(final Node node) {
final DragContext dragContext = new DragContext();
final Group wrapGroup = new Group(node);
wrapGroup.addEventFilter(
MouseEvent.ANY,
new EventHandler<MouseEvent>() {
@Override
public void handle(final MouseEvent mouseEvent) {
if (dragModeActiveProperty.get()) {
// disable mouse events for all children
mouseEvent.consume();
}
}
});
wrapGroup.addEventFilter(
MouseEvent.MOUSE_PRESSED,
new EventHandler<MouseEvent>() {
@Override
public void handle(final MouseEvent mouseEvent) {
if (dragModeActiveProperty.get()) {
// remember initial mouse cursor coordinates
// and node position
dragContext.mouseAnchorX = mouseEvent.getX();
dragContext.mouseAnchorY = mouseEvent.getY();
dragContext.initialTranslateX =
node.getTranslateX();
dragContext.initialTranslateY =
node.getTranslateY();
}
}
});
wrapGroup.addEventFilter(
MouseEvent.MOUSE_DRAGGED,
new EventHandler<MouseEvent>() {
@Override
public void handle(final MouseEvent mouseEvent) {
if (dragModeActiveProperty.get()) {
// shift node from its initial position by delta
// calculated from mouse cursor movement
node.setTranslateX(
dragContext.initialTranslateX
+ mouseEvent.getX()
- dragContext.mouseAnchorX);
node.setTranslateY(
dragContext.initialTranslateY
+ mouseEvent.getY()
- dragContext.mouseAnchorY);
}
}
});
return wrapGroup;
}
private static Node createLoginPanel() {
final ToggleGroup toggleGroup = new ToggleGroup();
final TextField textField = new TextField();
textField.setPrefColumnCount(10);
textField.setPromptText("Your name");
final PasswordField passwordField = new PasswordField();
passwordField.setPrefColumnCount(10);
passwordField.setPromptText("Your password");
final ChoiceBox<String> choiceBox = new ChoiceBox<>(
FXCollections.observableArrayList(
"English", "\u0420\u0443\u0441\u0441\u043a\u0438\u0439",
"Fran\u00E7ais"));
choiceBox.setTooltip(new Tooltip("Your language"));
choiceBox.getSelectionModel().select(0);
final HBox panel =
createHBox(6,
createVBox(2, createRadioButton("High", toggleGroup, true),
createRadioButton("Medium", toggleGroup,
false),
createRadioButton("Low", toggleGroup, false)),
createVBox(2, textField, passwordField),
choiceBox);
panel.setAlignment(Pos.BOTTOM_LEFT);
configureBorder(panel);
return panel;
}
private static Node createConfirmationPanel() {
final Label acceptanceLabel = new Label("Not Available");
final Button acceptButton = new Button("Accept");
acceptButton.setOnAction(
new EventHandler<ActionEvent>() {
@Override
public void handle(final ActionEvent event) {
acceptanceLabel.setText("Accepted");
}
});
final Button declineButton = new Button("Decline");
declineButton.setOnAction(
new EventHandler<ActionEvent>() {
@Override
public void handle(final ActionEvent event) {
acceptanceLabel.setText("Declined");
}
});
final HBox panel = createHBox(6, acceptButton,
declineButton,
acceptanceLabel);
panel.setAlignment(Pos.CENTER_LEFT);
configureBorder(panel);
return panel;
}
private static Node createProgressPanel() {
final Slider slider = new Slider();
final ProgressIndicator progressIndicator = new ProgressIndicator(0);
progressIndicator.progressProperty().bind(
Bindings.divide(slider.valueProperty(),
slider.maxProperty()));
final HBox panel = createHBox(6, new Label("Progress:"),
slider,
progressIndicator);
configureBorder(panel);
return panel;
}
private static void configureBorder(final Region region) {
region.setStyle("-fx-background-color: white;"
+ "-fx-border-color: black;"
+ "-fx-border-width: 1;"
+ "-fx-border-radius: 6;"
+ "-fx-padding: 6;");
}
private static RadioButton createRadioButton(final String text,
final ToggleGroup toggleGroup,
final boolean selected) {
final RadioButton radioButton = new RadioButton(text);
radioButton.setToggleGroup(toggleGroup);
radioButton.setSelected(selected);
return radioButton;
}
private static HBox createHBox(final double spacing,
final Node... children) {
final HBox hbox = new HBox(spacing);
hbox.getChildren().addAll(children);
return hbox;
}
private static VBox createVBox(final double spacing,
final Node... children) {
final VBox vbox = new VBox(spacing);
vbox.getChildren().addAll(children);
return vbox;
}
private static final class DragContext {
public double mouseAnchorX;
public double mouseAnchorY;
public double initialTranslateX;
public double initialTranslateY;
}
}
