在TreeTableView中添加进度条(将Double值返回给Observable< Double>) [英] Add progressbar in TreeTableView (returning Double value to Observable<Double>)
问题描述
我正在尝试JavaFX，并且试图在树表中添加进度条.有没有一种方法可以将薪金值链接到进度栏.
I am experimenting with JavaFX and I am trying to add a progress bar in tree table. Is there a way to link the values of salary to progress bar.
我的代码是的修改版Oracle的TreeTableView 示例:
public class TreeTableViewSample extends Application implements Runnable {
List<Employee> employees = Arrays.<Employee>asList(
new Employee("Ethan Williams", 30.0),
new Employee("Emma Jones", 10.0),
new Employee("Michael Brown", 70.0),
new Employee("Anna Black", 50.0),
new Employee("Rodger York", 20.0),
new Employee("Susan Collins", 70.0));
/* private final ImageView depIcon = new ImageView (
new Image(getClass().getResourceAsStream("department.png"))
);
*/
final CheckBoxTreeItem<Employee> root
= new CheckBoxTreeItem<>(new Employee("Sales Department", 0.0));
final CheckBoxTreeItem<Employee> root2
= new CheckBoxTreeItem<>(new Employee("Departments", 0.0));
public static void main(String[] args) {
Application.launch(TreeTableViewSample.class, args);
}
@Override
public void start(Stage stage) {
root.setExpanded(true);
employees.stream().forEach((employee) -> {
CheckBoxTreeItem<Employee> cbt=new CheckBoxTreeItem<>(employee);
cbt.selectedProperty().addListener((ObservableValue<? extends Boolean> observable, Boolean oldValue, Boolean newValue) -> {
if (newValue) {
System.out.println("Slected employ name is "+cbt.getValue().getName());
}
});
root.getChildren().add(cbt);
});
stage.setTitle("Tree Table View Sample");
final Scene scene = new Scene(new Group(), 400, 400);
scene.setFill(Color.LIGHTGRAY);
Group sceneRoot = (Group) scene.getRoot();
TreeTableColumn<Employee, String> empColumn
= new TreeTableColumn<>("Employee");
empColumn.setPrefWidth(150);
empColumn.setCellValueFactory(
(TreeTableColumn.CellDataFeatures<Employee, String> param)
-> new ReadOnlyStringWrapper(param.getValue().getValue().getName())
);
TreeTableColumn<Employee, Double> salaryColumn
= new TreeTableColumn<>("Salary");
salaryColumn.setPrefWidth(190);
salaryColumn.setCellValueFactory(new Callback<CellDataFeatures<Employee, Double>, ObservableValue<Double>>() {
@Override
public ObservableValue<Double> call(CellDataFeatures<Employee, Double> p) {
// p.getValue() returns the Employee instance for a particular TableView row
return p.getValue().getValue().getSalary();
}
});
salaryColumn.setCellFactory(ProgressBarTreeTableCell.<Employee>forTreeTableColumn());
root2.getChildren().add(root);
TreeTableView<Employee> treeTableView = new TreeTableView<>(root2);
treeTableView.getColumns().setAll(empColumn, salaryColumn);
treeTableView.setRowFactory(f -> new CheckBoxTreeTableRowHack<>());
sceneRoot.getChildren().add(treeTableView);
stage.setScene(scene);
stage.show();
ScheduledExecutorService executorService = Executors.newScheduledThreadPool(1);
executorService.scheduleAtFixedRate(this, 3, 10, TimeUnit.SECONDS);
}
@Override
public void run() {
root2.getValue().setSalary(calcSalary(root));
}
public double calcSalary(TreeItem<Employee> t) {
Double salary = 0.0;
if (!t.isLeaf()) {
ObservableList<TreeItem<Employee>> al = t.getChildren();
for (int i = 0; i < al.size(); i++) {
TreeItem<Employee> get = al.get(i);
salary += calcSalary(get);
}
t.getValue().setSalary(salary);
}
return salary += t.getValue().getSalary();
}
public class Employee {
private SimpleStringProperty name;
private SimpleDoubleProperty salary;
public SimpleStringProperty nameProperty() {
if (name == null) {
name = new SimpleStringProperty(this, "name");
}
return name;
}
public SimpleDoubleProperty salaryProperty() {
if (salary == null) {
salary = new SimpleDoubleProperty(this, "salary");
}
return salary;
}
private Employee(String name, Double salary) {
this.name = new SimpleStringProperty(name);
this.salary = new SimpleDoubleProperty(salary);
}
public String getName() {
return name.get();
}
public void setName(String fName) {
name.set(fName);
}
public Double getSalary() {
return salary.get();
}
public void setSalary(Double fName) {
salary.set(fName);
}
}
}
我在return p.getValue().getValue().getSalary();收到错误消息，提示为Incompatible Types: Double cannot be converted to ObservableValue<Double>.据我所知，您必须在调用方法的返回中返回ObservableValue.但是作为新手，我无法找到一种方法来创造价值.设置字符串很容易.
I am recieving error at return p.getValue().getValue().getSalary(); it says Incompatible Types: Double cannot be converted to ObservableValue<Double>. As i know you have to return ObservableValue in the return of the call method. But as newbie i am unable to find a way to cast the value. Setting string is easy.
到目前为止，我已经尝试过return new ReadOnlyDoubleWrapper(p.getValue().getValue().getSalary());
，但这对我也没有解决.
So far i have tried return new ReadOnlyDoubleWrapper(p.getValue().getValue().getSalary());
but that also didn't worked out for me.
我正在使用JavaFx 8.
I am using JavaFx 8.
我正在尝试创建薪金条，也可以将其用作任务及其子任务的进度条. (只需玩UI).但是不知道如何将它们与雇员的真实价值联系起来，因为我猜普通的表视图不同于树形表视图.谢谢 ！ :)
I am trying to create Salary Bars, which can also be used as progress bar for a task and its sub tasks. (Just playing with UI). But don't know how to connect them with the real values of employe, as i guess normal table view is different from tree table view. Thanks ! :)
推荐答案
这与您需要将列设置为TreeTableColumn<Employee, Number>.然后，您可以返回员工的salaryProperty:
You need to make the column a TreeTableColumn<Employee, Number>. Then you can just return the salaryProperty for the employee:
TreeTableColumn<Employee, Number> salaryColumn
= new TreeTableColumn<>("Salary");
salaryColumn.setCellValueFactory(p -> p.getValue().getValue().salaryProperty());
另一种选择是使用salaryProperty().asObject()，它返回双向绑定到salaryProperty()的ObjectProperty<Double>:
The other option is to use salaryProperty().asObject() which returns an ObjectProperty<Double> bidirectionally bound to salaryProperty():
TreeTableColumn<Employee, Double> salaryColumn
= new TreeTableColumn<>("Salary");
salaryColumn.setCellValueFactory(p ->
p.getValue().getValue().salaryProperty().asObject());
这篇关于在TreeTableView中添加进度条(将Double值返回给Observable< Double>)的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
