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java - 如何在 JavaFX 表格 View 中添加按钮

转载 作者:IT老高 更新时间:2023-10-28 21:18:02 30 4
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我已经在 Google 和 Stackoverflow 上进行了搜索,但我没有得到给定的示例。有人可以向我解释一下。

我想在表格 View 的最后一列添加一个按钮,当它被点击时,它应该触发一个监听器并传递按钮行的对象。我只是没有从 gist.github.com 获得以下示例:

这是我当前的完整代码:

public class SchermdeelWerkplaats extends BorderPane{

//ATD moeder klasse met alle collecties etc.
private ATD $;

TableView tabel = new TableView();
Button nieuwTaak = new Button("Nieuwe taak inboeken");
final ObservableList<Task> data = FXCollections.observableArrayList();

public SchermdeelWerkplaats(ATD a) {

$ = a;

data.addAll($.agenda);

tabel.setEditable(false);
tabel.setPlaceholder(new Label("Geen taken"));

TableColumn c1 = new TableColumn("datum");
c1.setMinWidth(200);
TableColumn c2 = new TableColumn("type");
c2.setMinWidth(100);
TableColumn c3 = new TableColumn("uren");
c3.setMinWidth(100);
TableColumn c4 = new TableColumn("klaar");
c4.setMinWidth(200);
TableColumn c5 = new TableColumn("Werknemer");
c5.setMinWidth(100);
TableColumn c6= new TableColumn("Auto");
c6.setMinWidth(400);
TableColumn c7= new TableColumn("Actie");
c7.setMinWidth(400);

TableColumn col_action = new TableColumn<>("Action");

col_action.setCellValueFactory(
new Callback<TableColumn.CellDataFeatures<Task, Boolean>,
ObservableValue<Boolean>>() {

@Override
public ObservableValue<Boolean> call(TableColumn.CellDataFeatures<Task, Boolean> p) {
return new SimpleBooleanProperty(p.getValue() != null);
}
});

col_action.setCellFactory(
new Callback<TableColumn<Task, Task>, TableCell<Task, Task>>() {

@Override
public TableCell<Task, Task> call(TableColumn<Task, Task> p) {
return new ButtonCell();
}
}
);

c1.setCellValueFactory(
new PropertyValueFactory<Task,Date>("date")
);
c2.setCellValueFactory(
new PropertyValueFactory<Task,Task.TaskType>("type")
);
c3.setCellValueFactory(
new PropertyValueFactory<Task,Double>("hours")
);
c4.setCellValueFactory(
new PropertyValueFactory<Task,Boolean>("done")
);
c5.setCellValueFactory(
new PropertyValueFactory<Task,Employee>("employee")
);
c6.setCellValueFactory(
new PropertyValueFactory<Task,Car>("car")
);

tabel.getColumns().addAll(c1, c2, c3, c4, c5, c6, c7);
tabel.setItems(data);

setCenter(tabel);
setBottom(nieuwTaak);

}

//letterlijk van internet geplukt en datatype aangepast
private class ButtonCell extends TableCell<Task, Task> {


private Button cellButton;

ButtonCell(){
cellButton = new Button("jjhjhjh");
cellButton.setOnAction(new EventHandler<ActionEvent>(){

@Override
public void handle(ActionEvent t) {
// do something when button clicked
Task record = getItem();
// do something with record....
}
});
}

//Display button if the row is not empty
@Override
protected void updateItem(Task record, boolean empty) {
super.updateItem(record, empty);
if(!empty){
cellButton.setText("Something with "+record);
setGraphic(cellButton);
} else {
setGraphic(null);
}
}
}

}

现在我必须创建 ButtonCell extends TableCell 的部分是可以理解的。但是如何将其分配给列?

我明白了:

c1.setCellValueFactory(
new PropertyValueFactory<Task,Date>("date")
);

但不是这个:

           TableColumn col_action = new TableColumn<>("Action");

col_action.setCellValueFactory(
new Callback<TableColumn.CellDataFeatures<Task, Boolean>,
ObservableValue<Boolean>>() {

@Override
public ObservableValue<Boolean> call(TableColumn.CellDataFeatures<Task, Boolean> p) {
return new SimpleBooleanProperty(p.getValue() != null);
}
});

col_action.setCellFactory(
new Callback<TableColumn<Task, Task>, TableCell<Task, Task>>() {

@Override
public TableCell<Task, Task> call(TableColumn<Task, Task> p) {
return new ButtonCell();
}
}
);

最佳答案

为了能够呈现列,TableColumn 需要 cellValueFactory。但是底层数据模型中不存在“ Action ”列。在这种情况下,我只是给 cellValueFactory 一些虚拟值并继续:

public class JustDoIt extends Application {

private final TableView<Person> table = new TableView<>();
private final ObservableList<Person> data
= FXCollections.observableArrayList(
new Person("Jacob", "Smith"),
new Person("Isabella", "Johnson"),
new Person("Ethan", "Williams"),
new Person("Emma", "Jones"),
new Person("Michael", "Brown")
);

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

@Override
public void start(Stage stage) {
stage.setWidth(450);
stage.setHeight(500);

TableColumn firstNameCol = new TableColumn("First Name");
firstNameCol.setCellValueFactory(new PropertyValueFactory<>("firstName"));

TableColumn lastNameCol = new TableColumn("Last Name");
lastNameCol.setCellValueFactory(new PropertyValueFactory<>("lastName"));

TableColumn actionCol = new TableColumn("Action");
actionCol.setCellValueFactory(new PropertyValueFactory<>("DUMMY"));

Callback<TableColumn<Person, String>, TableCell<Person, String>> cellFactory
= //
new Callback<TableColumn<Person, String>, TableCell<Person, String>>() {
@Override
public TableCell call(final TableColumn<Person, String> param) {
final TableCell<Person, String> cell = new TableCell<Person, String>() {

final Button btn = new Button("Just Do It");

@Override
public void updateItem(String item, boolean empty) {
super.updateItem(item, empty);
if (empty) {
setGraphic(null);
setText(null);
} else {
btn.setOnAction(event -> {
Person person = getTableView().getItems().get(getIndex());
System.out.println(person.getFirstName()
+ " " + person.getLastName());
});
setGraphic(btn);
setText(null);
}
}
};
return cell;
}
};

actionCol.setCellFactory(cellFactory);

table.setItems(data);
table.getColumns().addAll(firstNameCol, lastNameCol, actionCol);

Scene scene = new Scene(new Group());

((Group) scene.getRoot()).getChildren().addAll(table);

stage.setScene(scene);
stage.show();
}

public static class Person {

private final SimpleStringProperty firstName;
private final SimpleStringProperty lastName;

private Person(String fName, String lName) {
this.firstName = new SimpleStringProperty(fName);
this.lastName = new SimpleStringProperty(lName);
}

public String getFirstName() {
return firstName.get();
}

public void setFirstName(String fName) {
firstName.set(fName);
}

public String getLastName() {
return lastName.get();
}

public void setLastName(String fName) {
lastName.set(fName);
}

}
}

关于java - 如何在 JavaFX 表格 View 中添加按钮,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/29489366/

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