如何在 JavaFx 中使用 CSS 设置 GridPane 的样式

Question

我是 JavaFx 的新手。我有一个用 FXML 创建的 GridPane。我想将该 GridPane 样式设置为下图。我尝试了以下答案并尝试了更多 CSS 元素。但这些都没有帮助我做到这一点。

JavaFX CSS class for GridPane, VBox, VBox

Center children in GridPane using CSS

Adding borders to GridPane JavaFX

而且我是否使用了错误的方法？我可以使用 GridPane 实现这一点，还是 TableView 很容易做到这一点？

Answer 1

我认为您可以使用TableView 控件。您可以使用以下代码开始：

控制器类：

package sample;

import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.control.TableCell;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;
import javafx.scene.control.cell.PropertyValueFactory;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;

import java.net.URL;
import java.time.Duration;
import java.time.LocalDate;
import java.time.LocalTime;
import java.time.format.DateTimeFormatter;
import java.util.ResourceBundle;

public class Controller implements Initializable {

    @FXML
    private TableView<Project>
            projectTableView;
    @FXML
    private TableColumn<Project, String>
            projeNameColumn;
    @FXML
    private TableColumn<Project, LocalDate>
            dateColumn;
    @FXML
    private TableColumn<Project, LocalTime>
            startTimeColumn,
            stopTimeColumn;
    @FXML
    private TableColumn<Project, Duration>
            durationColumn;

    private ObservableList<Project> projectList = FXCollections.observableArrayList();

    @Override
    public void initialize(URL location, ResourceBundle resources) {

        projectList.addAll(
                new Project("Landing page Design",
                        LocalDate.of(2019, 5, 21),
                        LocalTime.of(13, 10),
                        LocalTime.of(21, 20, 37)),
                new Project("Mobile App",
                        LocalDate.of(2019, 5, 21),
                        LocalTime.of(12, 0),
                        LocalTime.of(20, 0)),
                new Project("UI/UX",
                        LocalDate.of(2019, 5, 21),
                        LocalTime.of(13, 10),
                        LocalTime.of(13, 20, 37)),
                new Project("Website/apps",
                        LocalDate.of(2019, 5, 21),
                        LocalTime.of(13, 11),
                        LocalTime.of(21, 0, 37)),
                new Project("Branding",
                        LocalDate.of(2019, 5, 21),
                        LocalTime.of(13, 10),
                        LocalTime.of(13, 20, 37))
        );

        projectTableView.setItems(projectList);

        projeNameColumn.setCellValueFactory(new PropertyValueFactory<>("name"));
        projeNameColumn.setCellFactory(tc -> {
            final Image image = new Image(getClass().getResource("image.png").toString());
            return new TableCell<Project, String>() {
                private ImageView imageView = new ImageView();

                @Override
                protected void updateItem(String item, boolean empty) {
                    super.updateItem(item, empty);
                    if (item == null || empty)
                        setGraphic(null);
                    else {
                        imageView.setImage(image);
                        imageView.setPreserveRatio(true);
                        imageView.setFitHeight(35);
                        setGraphic(imageView);
                        setText(item);
                    }
                }
            };
        });

        dateColumn.setCellValueFactory(new PropertyValueFactory("date"));
        dateColumn.setCellFactory((TableColumn<Project, LocalDate> column) -> new TableCell<Project, LocalDate>() {
            protected void updateItem(LocalDate item, boolean empty) {
                super.updateItem(item, empty);
                if (item == null || empty)
                    setText(null);
                else
                    setText(DateTimeFormatter.ofPattern("MMM dd, yyyy").format(item));
            }
        });

        startTimeColumn.setCellValueFactory(new PropertyValueFactory("startTime"));
        startTimeColumn.setCellFactory((TableColumn<Project, LocalTime> column) -> new TableCell<Project, LocalTime>() {
            protected void updateItem(LocalTime item, boolean empty) {
                super.updateItem(item, empty);
                if (item == null || empty)
                    setText(null);
                else
                    setText(DateTimeFormatter.ofPattern("hh:mm a").format(item));
            }
        });

        stopTimeColumn.setCellValueFactory(new PropertyValueFactory("stopTime"));
        stopTimeColumn.setCellFactory((TableColumn<Project, LocalTime> column) -> new TableCell<Project, LocalTime>() {
            protected void updateItem(LocalTime item, boolean empty) {
                super.updateItem(item, empty);
                if (item == null || empty)
                    setText(null);
                else
                    setText(DateTimeFormatter.ofPattern("hh:mm a").format(item));
            }
        });

        durationColumn.setCellValueFactory(new PropertyValueFactory("duration"));
        durationColumn.setCellFactory((TableColumn<Project, Duration> column) -> new TableCell<Project, Duration>() {
            protected void updateItem(Duration item, boolean empty) {
                super.updateItem(item, empty);
                if (item == null || empty) {
                    setText(null);
                } else {
                    int s = (int) item.getSeconds();
                    int hours = s / 3600;
                    int minutes = (s % 3600) / 60;
                    int seconds = (s % 60);
                    setText(String.format("%02d:%02d:%02d", hours, minutes, seconds));
                }
            }
        });
    }
}

项目类：

package sample;

import javafx.beans.property.ObjectProperty;
import javafx.beans.property.SimpleObjectProperty;
import javafx.beans.property.SimpleStringProperty;

import java.time.Duration;
import java.time.LocalDate;
import java.time.LocalTime;

public class Project {

    private final SimpleStringProperty name;
    private final ObjectProperty<LocalDate> date;
    private final ObjectProperty<LocalTime> startTime, stopTime;
    private final ObjectProperty<Duration> duration;

    public Project(String name, LocalDate date, LocalTime startTime, LocalTime stopTime) {
        this.name = new SimpleStringProperty(name);
        this.date = new SimpleObjectProperty<>(date);
        this.startTime = new SimpleObjectProperty<>(startTime);
        this.stopTime = new SimpleObjectProperty<>(stopTime);
        this.duration = new SimpleObjectProperty<>(Duration.between(startTime, stopTime));
    }

    public String getName() {
        return name.get();
    }

    public SimpleStringProperty nameProperty() {
        return name;
    }

    public void setName(String name) {
        this.name.set(name);
    }

    public LocalDate getDate() {
        return date.get();
    }

    public ObjectProperty<LocalDate> dateProperty() {
        return date;
    }

    public void setDate(LocalDate date) {
        this.date.set(date);
    }

    public LocalTime getStartTime() {
        return startTime.get();
    }

    public ObjectProperty<LocalTime> startTimeProperty() {
        return startTime;
    }

    public void setStartTime(LocalTime startTime) {
        this.startTime.set(startTime);
    }

    public LocalTime getStopTime() {
        return stopTime.get();
    }

    public ObjectProperty<LocalTime> stopTimeProperty() {
        return stopTime;
    }

    public void setStopTime(LocalTime stopTime) {
        this.stopTime.set(stopTime);
    }

    public Duration getDuration() {
        return duration.get();
    }

    public ObjectProperty<Duration> durationProperty() {
        return duration;
    }

    public void setDuration(Duration duration) {
        this.duration.set(duration);
    }
}

FXML 文件：

<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.scene.control.TableColumn?>
<?import javafx.scene.control.TableView?>

<TableView fx:id="projectTableView" stylesheets="@styling.css" xmlns:fx="http://javafx.com/fxml/1" xmlns="http://javafx.com/javafx/11.0.1" fx:controller="sample.Controller">
  <columns>
    <TableColumn id="first-column" fx:id="projeNameColumn" prefWidth="144.0" style="-fx-alignment: center-left;" text="Project" />
    <TableColumn fx:id="dateColumn" prefWidth="96.0" style="-fx-alignment: center;" text="Date" />
      <TableColumn fx:id="startTimeColumn" prefWidth="75.0" style="-fx-alignment: center;" text="Start Time" />
      <TableColumn fx:id="stopTimeColumn" prefWidth="75.0" style="-fx-alignment: center;" text="Stop Time" />
      <TableColumn fx:id="durationColumn" prefWidth="75.0" style="-fx-alignment: center;" text="Duration" />
  </columns>
   <columnResizePolicy>
      <TableView fx:constant="CONSTRAINED_RESIZE_POLICY" />
   </columnResizePolicy>
</TableView>

CSS 文件：

.table-view .column-header,
.table-view .column-header-background .filler {
    -fx-background-color: #F9F9F9;
}

.table-view .column-header {
    -fx-cell-size: 35;
    -fx-border-width: 0.25 0.25 1 0.25;
    -fx-border-color: #EDEDED;
}

.table-view .column-header .label{
   -fx-padding: 10 0 10 0;
}

.table-view .cell{
    -fx-cell-size: 35;
}

预览：