TreeView自定义Cell

准备数据

TreeView<String> treeView = new TreeView<>();  
treeView.setLayoutX(100);  
treeView.setLayoutY(100);  
TreeItem<String> china = new TreeItem<>("中国");  
TreeItem<String> hlj = new TreeItem<>("黒龙江");  
TreeItem<String> heb = new TreeItem<>("哈尔滨");  
TreeItem<String> jms = new TreeItem<>("佳木斯");  
TreeItem<String> dq = new TreeItem<>("大庆");  
hlj.getChildren().addAll(heb, jms, dq);  
TreeItem<String> gd = new TreeItem<>("广东");  
TreeItem<String> zj = new TreeItem<>("珠海");  
TreeItem<String> sz = new TreeItem<>("深圳");  
TreeItem<String> dg = new TreeItem<>("东莞");  
gd.getChildren().addAll(zj, sz, dg);  
TreeItem<String> tw = new TreeItem<>("台湾");  
TreeItem<String> tb = new TreeItem<>("台北");  
TreeItem<String> gx = new TreeItem<>("高雄");  
TreeItem<String> tn = new TreeItem<>("台南");  
tw.getChildren().addAll(tb, gx, tn);  
china.getChildren().addAll(hlj, gd, tw);  
treeView.setRoot(china);

设置可编辑treeView.setEditable(true);

自定义行

treeView.setCellFactory(new Callback<TreeView<String>, TreeCell<String>>() {  
    @Override  
    public TreeCell<String> call(TreeView<String> param) {  
        return new TreeCell<String>() {  
            @Override  
            protected void updateItem(String item, boolean empty) {  
                super.updateItem(item, empty);  
                if (empty || item.equals("")) {  
                    this.setGraphic(null);  
                    return;  
                }  
                // 展开时（右边使用）的图片  
                if (this.getTreeItem().isExpanded()) {  
                    ImageView imageView = new ImageView("/images/add.png");  
                    imageView.setPreserveRatio(true);  
                    imageView.setFitWidth(15);  
                    this.setDisclosureNode(imageView);  
                } else {  
                    // 收起时（右边使用）的图片  
                    ImageView imageView = new ImageView("/images/sub.png");  
                    imageView.setPreserveRatio(true);  
                    imageView.setFitWidth(15);  
                    this.setDisclosureNode(imageView);  
                }  
                // 保存数据
                this.setUserData(item);  
                // 创建组件
                initGraphic();  
            }  
            @Override  
            public void startEdit() {  
                super.startEdit();  
                TextField textField = new TextField(this.getUserData().toString());  
                this.setGraphic(textField);  
                textField.requestFocus();  
                // 回车提交编辑事件
                textField.setOnKeyPressed(event -> {  
                    if (event.getCode() == KeyCode.ENTER) {  
                        commitEdit(textField.getText());  
                    }  
                });  
            }  
            @Override  
            public void cancelEdit() {  
                super.cancelEdit();  
                initGraphic();  
            }  
            @Override  
            public void commitEdit(String newValue) {  
                super.commitEdit(newValue);  
                // 提交编辑，修改数据
                this.setUserData(newValue);  
            }  
            // 自定义的组件样式
            private void initGraphic() {  
                Label label = new Label(this.getUserData().toString());  
                this.setGraphic(label);  
            }  
        };  
    }  
});

# TreeView自定义Cell

TreeView自定义Cell