java - JavaFX 2.1 更改 ScrollPane 滚动条大小

Question

我试图弄清楚如何更改滚动窗格滚动条的大小以使其在 javafx 2.1 中更宽。

Answer 1

ScrollBar 宽度基于 ScrollPane 的字体大小。

将 ScrollPane 的字体大小设置为较大，并且（如果需要）将 ScrollPane 的内容节点的字体大小发送回正常值。

ScrollPane scrollPane = new ScrollPane();
scrollPane.setContent(content);
scrollPane.setStyle("-fx-font-size: 40px;");  // set the font size to something big.
content.setStyle("-fx-font-size: 11px;");     // reset the region's font size to the default.

这是一个完整的可执行示例，基于我对同一主题的上一个论坛问题的回答。

import javafx.application.Application;
import javafx.collections.*;
import javafx.scene.*;
import javafx.stage.Stage;
import javafx.scene.chart.*;
import javafx.scene.control.ScrollPane;
import javafx.scene.layout.Region;

public class BigScrollBars extends Application {
  @Override public void start(Stage stage) {
    // create a chart.
    ObservableList<PieChart.Data> pieChartData =
      FXCollections.observableArrayList(
        new PieChart.Data("Grapefruit", 13),
        new PieChart.Data("Oranges", 25),
        new PieChart.Data("Plums", 10),
        new PieChart.Data("Pears", 22),
        new PieChart.Data("Apples", 30)
      );
    final PieChart chart = new PieChart(pieChartData);
    chart.setTitle("Imported Fruits");
    chart.setMinSize(Region.USE_PREF_SIZE, Region.USE_PREF_SIZE);
    chart.setPrefSize(800,600);

    // create a scrollpane.
    ScrollPane scrollPane = new ScrollPane();
    scrollPane.setContent(chart);
    scrollPane.setStyle("-fx-font-size: 40px;");  // set the font size to something big.
    chart.setStyle("-fx-font-size: 11px;");       // reset the region's font size to the default.

    // show the scene.
    stage.setScene(new Scene(scrollPane, 400, 300));
    stage.show();
  }

  public static void main(String[] args) { launch(args); }
}

Answer 2

以下解决方案对我有用：

    @FXML
    private ScrollPane myScrollPane;

    // Where you need in your code do the following:
    Set<Node> nodes = myScrollPane.lookupAll(".scroll-bar");
    for (final Node node : nodes) {
        if (node instanceof ScrollBar) {
            ScrollBar sb = (ScrollBar) node;
            if (sb.getOrientation() == Orientation.VERTICAL) { // HORIZONTAL is another option.
                sb.setPrefWidth(40); // You can define your preferred width here.
            }
        }
    }