我正在尝试将 MouseClicked 事件侦听器添加到 Tree Cell,以便在用户单击单元格的 Graphic 或 String 值时触发。
测试应用程序.java
public class TestApp extends Application {
@Override
public void start(Stage stage) throws Exception {
Image image = new Image(getClass().getResourceAsStream("icon.png"));
TreeItem<String> root = new TreeItem<String>("Root");
root.setGraphic(new ImageView(image));
TreeItem<String> child = new TreeItem<String>("Child");
root.getChildren().add(child);
TreeView<String> tree = new TreeView<String>(root);
tree.setCellFactory(new TestTreeCellFactory());
StackPane pane = new StackPane();
pane.getChildren().add(tree);
stage.setScene(new Scene(pane, 300, 250));
stage.show();
}
public static void main(String[] args) {
launch(args);
}
private class TestTreeCellFactory implements Callback<TreeView<String>, TreeCell<String>> {
@Override
public TreeCell<String> call(TreeView<String> treeView) {
CheckBoxTreeCell<String> tc = new CheckBoxTreeCell<String>();
tc.setOnMouseClicked((event) -> mousePressed(event, treeView));
return tc;
}
public void mousePressed(MouseEvent event, TreeView<String> treeView) {
if(event.getButton().equals(MouseButton.SECONDARY)) {
System.out.println("Right Mouse Button Clicked!");
}
}
}
}
当我单击字符串值时,鼠标事件当前正在触发,但在我单击图形图标时未触发。在尝试调试问题时,以下是我的一些观察:
- 似乎图形以某种方式与复选框相关联(单击图形将切换复选框值)。
- 单击图形不会选择行,而单击文本值会。
有没有办法在填充后将侦听器附加到 Tree Cell 的图形,或者我是否以错误的方式考虑这一点?