通过php在bootstrap框架上生成的缩略图的正确对齐(Proper alignment of thumbnails generated via php on bootstrap framework)

 您的单元格需要观察另一个组合框中的值，以便它知道如果其中的值发生更改，则更新其禁用状态。 
 
 请注意，在单元格实现中还有其他错误：您必须考虑updateItem()方法中的所有可能性：例如，您没有正确处理null为空的项（单元格为空），或者将禁用状态设置为需要时假。 最后，在这里使用字符串作为数据类型既不方便（你可能必须在某些时候转换回int以使用这些值）并且弄乱逻辑（因为“10”小于“2”，例如）。 你应该在这里使用ComboBox<Integer> 。 
 
 这是一个只有两个“小时”组合框的实现： 
 
import java.util.function.BiPredicate;

import javafx.application.Application;
import javafx.beans.value.ObservableValue;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.ComboBox;
import javafx.scene.control.Label;
import javafx.scene.control.ListCell;
import javafx.scene.layout.GridPane;
import javafx.stage.Stage;


public class DependentComboBoxes extends Application {

    private ComboBox<Integer> startHours ;
    private ComboBox<Integer> endHours ;

    @Override
    public void start(Stage primaryStage) {
        startHours = new ComboBox<>();
        endHours = new ComboBox<>();
        startHours.setCellFactory(lv -> new StartHoursCell());
        endHours.setCellFactory(lv -> new EndHoursCell());
        for (int i = 0; i < 24 ; i++) {
            startHours.getItems().add(i);
            endHours.getItems().add(i);
        }

        GridPane root = new GridPane();
        root.setHgap(5);
        root.setVgap(5);
        root.addRow(0, new Label("Start hours:"), startHours);
        root.addRow(1, new Label("End hours:"), endHours);

        root.setAlignment(Pos.CENTER);
        root.setPadding(new Insets(20));
        primaryStage.setScene(new Scene(root));
        primaryStage.show();
    }

    private class StartHoursCell extends ListCell<Integer> {

        StartHoursCell() {
            endHours.valueProperty().addListener((obs, oldEndHours, newEndHours) -> updateDisableState());
        }

        @Override
        protected void updateItem(Integer hours, boolean empty) {
            super.updateItem(hours, empty);
            if (empty) {
                setText(null);
            } else {
                setText(hours.toString());
                updateDisableState();
            }
        }

        private void updateDisableState() {
            boolean disable = getItem() != null && endHours.getValue() != null && 
                    getItem().intValue() > endHours.getValue();
            setDisable(disable) ;
            setOpacity(disable ? 0.5 : 1);
        }
    }

    private class EndHoursCell extends ListCell<Integer> {

        EndHoursCell() {
            startHours.valueProperty().addListener((obs, oldEndHours, newEndHours) -> updateDisableState());
        }

        @Override
        protected void updateItem(Integer hours, boolean empty) {
            super.updateItem(hours, empty);
            if (empty) {
                setText(null);
            } else {
                setText(hours.toString());
                updateDisableState();
            }
        }

        private void updateDisableState() {
            boolean disable = getItem() != null && startHours.getValue() != null && 
                    getItem().intValue() < startHours.getValue();
            setDisable(disable) ;
            setOpacity(disable ? 0.5 : 1);

        }
    }

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

Your cell needs to observe the value in the other combo box, so that it knows to update its disabled state if the value there changes. 
 
Note you also have other bugs in the cell implementation: you must account for all possibilities in your updateItem() method: e.g. you don't properly deal with the item being null (the cell being empty), or setting the disable state back to false when needed. Finally, using strings as the data type here is both inconvenient (you presumably have to convert back to ints at some point to use these values) and messes up the logic (because "10" is less than "2", for example). You should use ComboBox<Integer> here.
 
Here's an implementation with just two "hours" combo boxes that works:
 
import java.util.function.BiPredicate;

import javafx.application.Application;
import javafx.beans.value.ObservableValue;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.ComboBox;
import javafx.scene.control.Label;
import javafx.scene.control.ListCell;
import javafx.scene.layout.GridPane;
import javafx.stage.Stage;


public class DependentComboBoxes extends Application {

    private ComboBox<Integer> startHours ;
    private ComboBox<Integer> endHours ;

    @Override
    public void start(Stage primaryStage) {
        startHours = new ComboBox<>();
        endHours = new ComboBox<>();
        startHours.setCellFactory(lv -> new StartHoursCell());
        endHours.setCellFactory(lv -> new EndHoursCell());
        for (int i = 0; i < 24 ; i++) {
            startHours.getItems().add(i);
            endHours.getItems().add(i);
        }

        GridPane root = new GridPane();
        root.setHgap(5);
        root.setVgap(5);
        root.addRow(0, new Label("Start hours:"), startHours);
        root.addRow(1, new Label("End hours:"), endHours);

        root.setAlignment(Pos.CENTER);
        root.setPadding(new Insets(20));
        primaryStage.setScene(new Scene(root));
        primaryStage.show();
    }

    private class StartHoursCell extends ListCell<Integer> {

        StartHoursCell() {
            endHours.valueProperty().addListener((obs, oldEndHours, newEndHours) -> updateDisableState());
        }

        @Override
        protected void updateItem(Integer hours, boolean empty) {
            super.updateItem(hours, empty);
            if (empty) {
                setText(null);
            } else {
                setText(hours.toString());
                updateDisableState();
            }
        }

        private void updateDisableState() {
            boolean disable = getItem() != null && endHours.getValue() != null && 
                    getItem().intValue() > endHours.getValue();
            setDisable(disable) ;
            setOpacity(disable ? 0.5 : 1);
        }
    }

    private class EndHoursCell extends ListCell<Integer> {

        EndHoursCell() {
            startHours.valueProperty().addListener((obs, oldEndHours, newEndHours) -> updateDisableState());
        }

        @Override
        protected void updateItem(Integer hours, boolean empty) {
            super.updateItem(hours, empty);
            if (empty) {
                setText(null);
            } else {
                setText(hours.toString());
                updateDisableState();
            }
        }

        private void updateDisableState() {
            boolean disable = getItem() != null && startHours.getValue() != null && 
                    getItem().intValue() < startHours.getValue();
            setDisable(disable) ;
            setOpacity(disable ? 0.5 : 1);

        }
    }

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