你幾乎可以用CSS完成所有這些工作,然後在表格上添加一個rowFactory
的小魔術,以及一個細胞工廠,它爲你想隱藏的細胞設置一個css類,用於後續的相同項目類型。
在rowFactory
,創建一個TableRow
是觀察表中的項目列表,並遵守自己的索引,並將該行一個CSS PsuedoClass根據它是否是同類型的第一項:
PseudoClass firstOfTypePseudoclass = PseudoClass.getPseudoClass("first-of-type");
table.setRowFactory(t -> {
TableRow<Product> row = new TableRow<>();
InvalidationListener listener = obs ->
row.pseudoClassStateChanged(firstOfTypePseudoclass,
isFirstOfType(table.getItems(), row.getIndex()));
table.getItems().addListener(listener);
row.indexProperty().addListener(listener);
return row ;
});
爲了顯示類型的柱,該細胞工廠實現僅僅是一個標準的實現,但在小區設置一個CSS類:
TableColumn<Product, Product.Type> typeColumn = ... ;
typeColumn.setCellFactory(c -> {
TableCell<Product, Product.Type> cell = new TableCell<Product, Product.Type>() {
@Override
public void updateItem(Product.Type type, boolean empty) {
super.updateItem(type, empty);
if (type == null) {
setText(null);
} else {
setText(type.toString());
}
}
};
cell.getStyleClass().add("type-cell");
return cell ;
});
然後附加外部樣式表。您可以以任何您想要的方式設計table-row-cell:first-of-type
。然後,只需風格細胞類型列是無形的,除非他們是table-row-cell:first-of-type
子節點:
.table-row-cell:first-of-type {
-fx-background-color: antiquewhite ;
}
.table-row-cell:first-of-type:odd {
-fx-background-color: derive(antiquewhite, 20%);
}
.table-row-cell .type-cell {
visibility: hidden ;
}
.table-row-cell:first-of-type .type-cell {
visibility: visible ;
}
並另存爲第一的型table.css該樣式表,下面的完整的示例做了你是什麼尋找:
import java.util.Comparator;
import java.util.List;
import java.util.function.Function;
import javafx.application.Application;
import javafx.beans.InvalidationListener;
import javafx.beans.property.DoubleProperty;
import javafx.beans.property.ObjectProperty;
import javafx.beans.property.SimpleDoubleProperty;
import javafx.beans.property.SimpleObjectProperty;
import javafx.beans.property.SimpleStringProperty;
import javafx.beans.property.StringProperty;
import javafx.beans.value.ObservableValue;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.collections.transformation.SortedList;
import javafx.css.PseudoClass;
import javafx.geometry.HPos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.ComboBox;
import javafx.scene.control.Label;
import javafx.scene.control.TableCell;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableRow;
import javafx.scene.control.TableView;
import javafx.scene.control.TextField;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.ColumnConstraints;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.Priority;
import javafx.stage.Stage;
public class FirstOfTypeTableExample extends Application {
@Override
public void start(Stage primaryStage) {
TableView<Product> table = new TableView<>() ;
ObservableList<Product> products = FXCollections.observableArrayList();
table.setItems(new SortedList<>(products, Comparator.comparing(Product::getType)));
TableColumn<Product, Product.Type> typeColumn = column("Type", Product::typeProperty);
typeColumn.setCellFactory(c -> {
TableCell<Product, Product.Type> cell = new TableCell<Product, Product.Type>() {
@Override
public void updateItem(Product.Type type, boolean empty) {
super.updateItem(type, empty);
if (type == null) {
setText(null);
} else {
setText(type.toString());
}
}
};
cell.getStyleClass().add("type-cell");
return cell ;
});
table.getColumns().add(typeColumn);
table.getColumns().add(column("Name", Product::nameProperty));
table.getColumns().add(column("Price", Product::priceProperty));
PseudoClass firstOfTypePseudoclass = PseudoClass.getPseudoClass("first-of-type");
table.setRowFactory(t -> {
TableRow<Product> row = new TableRow<>();
InvalidationListener listener = obs ->
row.pseudoClassStateChanged(firstOfTypePseudoclass,
isFirstOfType(table.getItems(), row.getIndex()));
table.getItems().addListener(listener);
row.indexProperty().addListener(listener);
return row ;
});
products.addAll(
new Product("Chips", 1.99, Product.Type.FOOD),
new Product("Ice Cream", 3.99, Product.Type.FOOD),
new Product("Beer", 8.99, Product.Type.DRINK),
new Product("Laptop", 1099.99, Product.Type.OTHER));
GridPane editor = createEditor(products);
BorderPane root = new BorderPane(table, null, null, editor, null) ;
Scene scene = new Scene(root, 600, 400);
scene.getStylesheets().add("first-of-type-table.css");
primaryStage.setScene(scene);
primaryStage.show();
}
private boolean isFirstOfType(List<Product> products, int index) {
if (index < 0 || index >= products.size()) {
return false ;
}
if (index == 0) {
return true ;
}
if (products.get(index).getType().equals(products.get(index-1).getType())) {
return false ;
} else {
return true ;
}
}
private GridPane createEditor(ObservableList<Product> products) {
ComboBox<Product.Type> typeSelector = new ComboBox<>(FXCollections.observableArrayList(Product.Type.values()));
TextField nameField = new TextField();
TextField priceField = new TextField();
Button add = new Button("Add");
add.setOnAction(e -> {
Product product = new Product(nameField.getText(),
Double.parseDouble(priceField.getText()), typeSelector.getValue());
products.add(product);
nameField.setText("");
priceField.setText("");
});
GridPane editor = new GridPane();
editor.addRow(0, new Label("Type:"), typeSelector);
editor.addRow(1, new Label("Name:"), nameField);
editor.addRow(2, new Label("Price:"), priceField);
editor.add(add, 3, 0, 2, 1);
GridPane.setHalignment(add, HPos.CENTER);
ColumnConstraints leftCol = new ColumnConstraints();
leftCol.setHalignment(HPos.RIGHT);
leftCol.setHgrow(Priority.NEVER);
editor.getColumnConstraints().addAll(leftCol, new ColumnConstraints());
editor.setHgap(10);
editor.setVgap(5);
return editor;
}
private <S,T> TableColumn<S,T> column(String title, Function<S, ObservableValue<T>> property) {
TableColumn<S, T> col = new TableColumn<>(title);
col.setCellValueFactory(cellData -> property.apply(cellData.getValue()));
return col ;
}
public static class Product {
public enum Type {FOOD, DRINK, OTHER }
private final ObjectProperty<Type> type = new SimpleObjectProperty<>();
private final StringProperty name = new SimpleStringProperty();
private final DoubleProperty price = new SimpleDoubleProperty();
public Product(String name, double price, Type type) {
setName(name);
setPrice(price);
setType(type);
}
public final StringProperty nameProperty() {
return this.name;
}
public final java.lang.String getName() {
return this.nameProperty().get();
}
public final void setName(final java.lang.String name) {
this.nameProperty().set(name);
}
public final DoubleProperty priceProperty() {
return this.price;
}
public final double getPrice() {
return this.priceProperty().get();
}
public final void setPrice(final double price) {
this.priceProperty().set(price);
}
public final ObjectProperty<Type> typeProperty() {
return this.type;
}
public final FirstOfTypeTableExample.Product.Type getType() {
return this.typeProperty().get();
}
public final void setType(final FirstOfTypeTableExample.Product.Type type) {
this.typeProperty().set(type);
}
}
public static void main(String[] args) {
launch(args);
}
}