我有一个 FlowPane 用作许多 BorderPane 组件的舞台。我为 BorderPane 组件创建了上下文菜单。我还想为 FlowPane 添加第二个上下文菜单，但事实证明，当我单击 BorderPane 时，我现在有两个上下文菜单。我需要一种从 BorderPane 中排除第二个上下文菜单的方法。
FlowPane flow;
public ScrollPane infrastructurePane()
{
flow = new FlowPane();
flow.setPadding(new Insets(5, 5, 5, 5));
flow.setVgap(15);
flow.setHgap(15);
flow.setAlignment(Pos.CENTER);
ScrollPane scroll = new ScrollPane();
scroll.setStyle("-fx-background-color:transparent;");
Rectangle2D primaryScreenBounds = Screen.getPrimary().getVisualBounds();
scroll.setPrefSize(primaryScreenBounds.getWidth(), primaryScreenBounds.getHeight());
scroll.setHbarPolicy(ScrollPane.ScrollBarPolicy.AS_NEEDED); // Horizontal scroll bar
scroll.setVbarPolicy(ScrollPane.ScrollBarPolicy.AS_NEEDED); // Vertical scroll bar
scroll.setContent(flow);
scroll.viewportBoundsProperty().addListener(new ChangeListener<Bounds>()
{
@Override
public void changed(ObservableValue<? extends Bounds> ov, Bounds oldBounds, Bounds bounds)
{
flow.setPrefWidth(bounds.getWidth());
flow.setPrefHeight(bounds.getHeight());
}
});
//flow.setPrefWrapLength(170); // preferred width allows for two columns
flow.setStyle("-fx-background-color: white;");
for (int i = 0; i < 28; i++)
{
flow.getChildren().add(generatePanel(flow));
}
scroll = makeTabContextMenu(scroll);
String cssURL = "/com/dx57dc/css/ButtonsDemo.css";
String css = this.getClass().getResource(cssURL).toExternalForm();
flow.getStylesheets().add(css);
return scroll;
}
public BorderPane generatePanel(FlowPane flow)
{
HBox thb = new HBox();
thb.setPadding(new Insets(10, 10, 10, 10));
thb.setStyle("-fx-background-color: #006699;");
HBox bhb = new HBox();
bhb.setPadding(new Insets(10, 10, 10, 10));
bhb.setStyle("-fx-background-color: #B0B0B0;");
DropShadow ds = new DropShadow();
ds.setOffsetY(3.0);
ds.setOffsetX(3.0);
ds.setColor(Color.GRAY);
BorderPane bp = new BorderPane();
bp.setEffect(ds);
bp.setCache(true);
bp.setPrefSize(320, 180);
bp.setMaxSize(320, 180);
bp.setId("app");
bp.setStyle("-fx-background-color: linear-gradient(to bottom, #f2f2f2, #d4d4d4);"
+ " -fx-border: 2px solid; -fx-border-color: white;");
bp.setTop(thb);
bp.setBottom(bhb);
ScrollPane sp = new ScrollPane();
bp = panelContextMenu(bp);
bp = mouseOver(bp);
return bp;
}
public BorderPane mouseOver(final BorderPane bp)
{
bp.setOnMouseEntered(new EventHandler<MouseEvent>()
{
@Override
public void handle(MouseEvent t)
{
bp.setStyle("-fx-border: 2px solid; -fx-border-color: black;");
}
});
bp.setOnMouseExited(new EventHandler<MouseEvent>()
{
@Override
public void handle(MouseEvent t)
{
bp.setStyle("-fx-border: 2px solid; -fx-border-color: white;");
}
});
bp.setOnMouseClicked(new EventHandler<MouseEvent>()
{
@Override
public void handle(MouseEvent me)
{
if (me.getButton().equals(MouseButton.PRIMARY) && me.getClickCount() % 1 == 0)
{
bp.setPrefSize(480, 280);
bp.setMaxSize(480, 280);
}
if (me.getButton().equals(MouseButton.PRIMARY) && me.getClickCount() % 2 == 0)
{
bp.setPrefSize(320, 180);
bp.setMaxSize(320, 180);
}
}
});
return bp;
}
private ScrollPane makeTabContextMenu(ScrollPane scroll)
{
ContextMenu contextMenu = new ContextMenu();
MenuItem item1 = new MenuItem("New");
item1.setOnAction(new EventHandler<ActionEvent>()
{
@Override
public void handle(ActionEvent e)
{
System.out.println("New");
flow.getChildren().add(generatePanel(flow));
}
});
// Rename
MenuItem rename = new MenuItem("Rename");
final TextField textField = new TextField();
rename.setOnAction(new EventHandler<ActionEvent>()
{
@Override
public void handle(ActionEvent e)
{
System.out.println("Rename");
//textField.setText(label.getText());
//tab.setGraphic(textField);
textField.selectAll();
textField.requestFocus();
}
});
textField.setOnAction(new EventHandler<ActionEvent>()
{
@Override
public void handle(ActionEvent event)
{
//label.setText(textField.getText());
//tab.setGraphic(label);
}
});
textField.focusedProperty().addListener(new ChangeListener<Boolean>()
{
@Override
public void changed(ObservableValue<? extends Boolean> observable,
Boolean oldValue, Boolean newValue)
{
if (!newValue)
{
//label.setText(textField.getText());
//tab.setGraphic(label);
}
}
});
// Orientation
Menu tabOrientation = new Menu("Orientation");
// Orientation sub menu - Top, Left, Right, Bottom
MenuItem tabOrientationSubTop = new MenuItem("Top");
tabOrientationSubTop.setOnAction(new EventHandler<ActionEvent>()
{
@Override
public void handle(ActionEvent e)
{
//tabPane.setSide(Side.TOP);
}
});
MenuItem tabOrientationSubLeft = new MenuItem("Left");
tabOrientationSubLeft.setOnAction(new EventHandler<ActionEvent>()
{
@Override
public void handle(ActionEvent e)
{
//tabPane.setSide(Side.LEFT);
}
});
MenuItem tabOrientationSubRight = new MenuItem("Right");
tabOrientationSubRight.setOnAction(new EventHandler<ActionEvent>()
{
@Override
public void handle(ActionEvent e)
{
//tabPane.setSide(Side.RIGHT);
}
});
MenuItem tabOrientationSubBottom = new MenuItem("Bottom");
tabOrientationSubBottom.setOnAction(new EventHandler<ActionEvent>()
{
@Override
public void handle(ActionEvent e)
{
//tabPane.setSide(Side.BOTTOM);
}
});
tabOrientation.getItems().addAll(tabOrientationSubTop, tabOrientationSubLeft, tabOrientationSubRight, tabOrientationSubBottom);
MenuItem item3 = new MenuItem("Close Tab");
item3.setOnAction(new EventHandler<ActionEvent>()
{
@Override
public void handle(ActionEvent e)
{
System.out.println("Close Tab");
// Close the Tab and remove it from the TabPane
//tabPane.getTabs().remove(tab);
// If there are no tabs into the TabPane fill all empty space by resizing the near components
// if (tabPane.getTabs().size() == 0)
// {
// ActionTabs.getMainPane().setManaged(false); // Exclude the panel to fill the empty space
// }
}
});
MenuItem item4 = new MenuItem("Close All Panels");
item4.setOnAction(new EventHandler<ActionEvent>()
{
@Override
public void handle(ActionEvent e)
{
System.out.println("Close All Panels");
flow.getChildren().clear();
}
});
contextMenu.getItems().addAll(item1, rename, tabOrientation, item3, item4);
scroll.setContextMenu(contextMenu);
return scroll;
}
public BorderPane panelContextMenu(final BorderPane bp)
{
final ContextMenu contextMenu = new ContextMenu();
MenuItem item1 = new MenuItem("About");
item1.setOnAction(new EventHandler<ActionEvent>()
{
@Override
public void handle(ActionEvent e)
{
System.out.println("About");
}
});
MenuItem item2 = new MenuItem("Preferences");
item2.setOnAction(new EventHandler<ActionEvent>()
{
@Override
public void handle(ActionEvent e)
{
System.out.println("Preferences");
}
});
MenuItem item3 = new MenuItem("Close");
item3.setOnAction(new EventHandler<ActionEvent>()
{
@Override
public void handle(ActionEvent e)
{
flow.getChildren().remove(bp);
}
});
contextMenu.getItems().addAll(item1, item2, item3);
bp.setOnContextMenuRequested(new EventHandler<ContextMenuEvent>()
{
@Override
public void handle(ContextMenuEvent event)
{
contextMenu.show(bp, event.getScreenX(), event.getScreenY());
}
});
bp.addEventHandler(MouseEvent.MOUSE_PRESSED, new EventHandler<MouseEvent>()
{
@Override
public void handle(MouseEvent event)
{
contextMenu.hide();
}
});
return bp;
}
有没有办法显示 makeTabContextMenu() 仅对 FlowPane 主体可见？