我认为可以根据以下JavaFX 11文档项目有条件地格式化JavaFXComboBoxTableCell
标签:
默认情况下,当不进行编辑时,
ComboBoxTableCell
会显示为Label
。
setTextFill
方法说明:设置属性的值
textFill
。
如果我的假设是正确的,我想知道如何修改以下SSCCE,以便将任何ComboBoxTableCell
labeltextFill
属性设置为以下Paint
值。谢谢!
Color.Red
如果其值无效Color.Blue
如果将其值设置为不同的行。public class PersonInRoom extends Application
{
private final ObservableList<Person> data = FXCollections.observableArrayList(
new Person("Jacob" , "Kitchen"),
new Person("Isabella", "Bedroom"),
new Person("Ethan" , "Attic"));
TableView<Person> table ;
public static void main(String[] args) {launch(args);}
@Override
public void start(Stage stage)
{
TableColumn nameCol = new TableColumn("Name");
nameCol.setCellValueFactory(new PropertyValueFactory<Person, String>("name"));
TableColumn roomCol = new TableColumn("Room");
roomCol.setCellValueFactory(new PropertyValueFactory<Person, String>("room"));
roomCol.setCellFactory(ComboBoxTableCell.forTableColumn("Bathroom", "Bedroom", "Kitchen"));
roomCol.setOnEditCommit((EventHandler<CellEditEvent<Person, String>>) t -> t.getTableView().getItems().get(t.getTablePosition().getRow()).setRoom(t.getNewValue()));
table = new TableView<>();
table.setEditable(true);
table.setItems(data);
table.getColumns().addAll(nameCol, roomCol);
VBox vbox = new VBox();
vbox.getChildren().addAll(table);
Scene scene = new Scene(vbox);
stage.setScene(scene);
stage.show();
}
public static class Person
{
private final SimpleStringProperty name;
private final SimpleStringProperty room;
private Person(String name, String room)
{
this.name = new SimpleStringProperty(name);
this.room = new SimpleStringProperty(room);
}
public String getName() {return name.get();}
public String getRoom() {return room.get();}
public void setRoom(String r) {room.set(r);}
}
}
正如kleopatra在2020-09-28 03:30:59Z所建议的那样,评论此页顶部的问题:
您需要一个自定义单元格并覆盖updateItem以根据上下文设置颜色。
...我创建了一个自定义单元格(ComboBoxTableCell
准确地说是a)并覆盖了它的updateItem
方法。
随时重新使用它(请参见下面的源代码),但请注意kleopatra在2020-09-28 03:30:59Z上针对此答案发布的评论:
您可能知道逻辑本身不属于视图(aka:单元)-应该在模型“附近”处理逻辑,包括通知路径(与通过调用refresh进行黑客操作相比)。
public class PersonInRoom extends Application
{
private final ObservableList<Person> data = FXCollections.observableArrayList(
new Person("Jacob", "Kitchen"),
new Person("Isabella", "Bedroom"),
new Person("Ethan", "Attic"));
TableView<Person> table;
public static void main(String[] args) {launch(args);}
@Override
public void start(Stage stage)
{
TableColumn nameCol = new TableColumn("Name");
nameCol.setCellValueFactory(new PropertyValueFactory<Person, String>("name"));
TableColumn roomCol = new TableColumn("Room");
roomCol.setCellValueFactory(new PropertyValueFactory<Person, String>("room"));
roomCol.setCellFactory(new Callback<TableColumn<Person, String>, ComboBoxTableCell<Person, String>>()
{
@Override
public ComboBoxTableCell<Person, String> call(TableColumn<Person, String> personStringTableColumn)
{
String rooms[] = {"Bathroom", "Bedroom", "Kitchen"};
return new ComboBoxTableCell<>(rooms)
{
@Override
public void updateItem(String item, boolean empty)
{
super.updateItem(item, empty);
if (!empty) {
setText(item);
boolean found = false;
for (int i = 0; i < rooms.length; i++) {
if (rooms[i].equals(item)) {
found = true;
break;
}
}
if (!found) {
setTextFill(Color.RED);
return;
}
int count = 0;
for (int i = 0; i < data.size(); i++) {
if (data.get(i).getRoom().equals(item)) {
if (++count > 1) {
setTextFill(Color.BLUE);
return;
}
}
}
setTextFill(Color.BLACK);
}
}
};
}
});
roomCol.setOnEditCommit(new EventHandler<CellEditEvent<Person, String>>()
{
@Override
public void handle(CellEditEvent<Person, String> cellEditEvent)
{
cellEditEvent.getTableView().getItems().get(cellEditEvent.getTablePosition().getRow()).setRoom(cellEditEvent.getNewValue());
table.refresh();
}
});
table = new TableView<>();
table.setEditable(true);
table.setItems(data);
table.getColumns().addAll(nameCol, roomCol);
VBox vbox = new VBox();
vbox.getChildren().addAll(table);
Scene scene = new Scene(vbox);
stage.setScene(scene);
stage.show();
}
public static class Person
{
private final SimpleStringProperty name;
private final SimpleStringProperty room;
private Person(String name, String room)
{
this.name = new SimpleStringProperty(name);
this.room = new SimpleStringProperty(room);
}
public String getName() {return name.get();}
public String getRoom() {return room.get();}
public void setRoom(String r) {room.set(r);}
}
}
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