我使用GridPane作为组件创建了一个场景。它基本上有5行2列，我在每个单元格中设置标签。现在我有一个问题，我需要根据条件删除一行。我能够使用setManaged（）甚至setVisibleProperty（）绑定它，但这会在UI上留下空白 我希望以下行占用空白区域。这可以实现吗？请帮忙。 ？这是fxml文件 `
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.*?> <?import javafx.geometry.*?> <?import javafx.scene.control.*?> <?import java.lang.*?> <?import javafx.scene.layout.*?>
<AnchorPane fx:id="anchor1" maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="400.0" prefWidth="600.0" xmlns="http://javafx.com/javafx/8.0.40" xmlns:fx="http://javafx.com/fxml/1" fx:controller="com.lynden.fms.shipmentdetail.ui.ShipmentInfoTestController"> <children>
<GridPane fx:id="gridPane" prefHeight="400.0" prefWidth="600.0" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0">
<columnConstraints>
<ColumnConstraints halignment="LEFT" minWidth="25.0" />
<ColumnConstraints halignment="LEFT" minWidth="25.0" />
</columnConstraints>
<rowConstraints>
<RowConstraints minHeight="25.0" prefHeight="25.0" valignment="TOP" vgrow="ALWAYS" />
<RowConstraints minHeight="25.0" prefHeight="25.0" valignment="TOP" vgrow="ALWAYS" />
<RowConstraints minHeight="25.0" prefHeight="25.0" valignment="TOP" vgrow="ALWAYS" />
<RowConstraints minHeight="25.0" prefHeight="25.0" valignment="TOP" vgrow="ALWAYS" />
<RowConstraints minHeight="25.0" prefHeight="25.0" valignment="TOP" vgrow="ALWAYS" />
</rowConstraints>
<children>
<Label fx:id="label1" styleClass="info-label-font" text="Label2" GridPane.rowIndex="1">
<GridPane.margin>
<Insets right="5.0" />
</GridPane.margin>
</Label>
<Label fx:id="value1" styleClass="info-value-label-font" text="Value111111" GridPane.columnIndex="1">
<padding>
<Insets left="10.0" />
</padding>
</Label>
<Label fx:id="value3" styleClass="info-value-label-font" text="Date/Time" GridPane.columnIndex="1" GridPane.rowIndex="2">
<padding>
<Insets left="10.0" />
</padding>
</Label>
<Label fx:id="label0" styleClass="info-label-font" text="Label1">
<GridPane.margin>
<Insets right="5.0" />
</GridPane.margin>
</Label>
<Label fx:id="label4" styleClass="info-label-font" text="Label4" GridPane.rowIndex="3" />
<Label fx:id="label5" styleClass="info-label-font" text="Label5" GridPane.rowIndex="4" />
<Label fx:id="value4" styleClass="info-value-label-font" text="Value here " GridPane.columnIndex="1" GridPane.rowIndex="3">
<padding>
<Insets left="10.0" />
</padding>
</Label>
<Label fx:id="value5" styleClass="info-value-label-font" text="Value" GridPane.columnIndex="1" GridPane.rowIndex="4">
<padding>
<Insets left="10.0" />
</padding>
</Label>
<VBox fx:id="value2" prefWidth="100.0" styleClass="info-value-label-font" stylesheets="@../styles/ShipmentDetail.css" GridPane.columnIndex="1" GridPane.hgrow="ALWAYS" GridPane.rowIndex="1" GridPane.vgrow="ALWAYS">
<padding>
<Insets left="10.0" />
</padding>
</VBox>
<Label fx:id="label3" styleClass="info-label-font" text="Label3" GridPane.rowIndex="2">
<GridPane.margin>
<Insets right="5.0" />
</GridPane.margin>
</Label>
</children>
</GridPane> </children> </AnchorPane>
＆＃39;
答案 0 :(得分：2)
将fx:id添加到与要隐藏的行对应的任何RowConstraints，然后在控制器中将min/pref/maxHeight属性绑定到要删除的条件行。
示例：
HideRowGridPane.fxml：
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.layout.GridPane?>
<?import javafx.scene.control.CheckBox?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.control.TextField?>
<?import javafx.scene.layout.RowConstraints?>
<?import javafx.geometry.Insets?>
<GridPane xmlns:fx="http://javafx.com/fxml/1" fx:controller="HideRowGridPaneController"
alignment="TOP_CENTER">
<CheckBox fx:id="showOptional" text="Show optional elements" GridPane.columnIndex="0" GridPane.rowIndex="0"/>
<Label fx:id="requiredLabel1" text="Required:" GridPane.columnIndex="0" GridPane.rowIndex="1"/>
<TextField fx:id="requiredTextField1" GridPane.columnIndex="1" GridPane.rowIndex="1"/>
<Label fx:id="optionalLabel1" text="Optional:" GridPane.columnIndex="0" GridPane.rowIndex="2"/>
<TextField fx:id="optionalTextField1" GridPane.columnIndex="1" GridPane.rowIndex="2"/>
<Label fx:id="requiredLabel2" text="Required:" GridPane.columnIndex="0" GridPane.rowIndex="3"/>
<TextField fx:id="requiredTextField2" GridPane.columnIndex="1" GridPane.rowIndex="3"/>
<Label fx:id="optionalLabel2" text="Optional:" GridPane.columnIndex="0" GridPane.rowIndex="4"/>
<TextField fx:id="optionalTextField2" GridPane.columnIndex="1" GridPane.rowIndex="4"/>
<Label fx:id="requiredLabel3" text="Required:" GridPane.columnIndex="0" GridPane.rowIndex="5"/>
<TextField fx:id="requiredTextField3" GridPane.columnIndex="1" GridPane.rowIndex="5"/>
<rowConstraints>
<RowConstraints />
<RowConstraints />
<RowConstraints fx:id="row2"/>
<RowConstraints />
<RowConstraints fx:id="row4"/>
<RowConstraints />
</rowConstraints>
<padding>
<Insets top="10" bottom="10" left="10" right="10" />
</padding>
</GridPane>
HideRowGridPaneController.java：
import java.util.stream.Stream;
import javafx.beans.binding.Bindings;
import javafx.fxml.FXML;
import javafx.scene.control.CheckBox;
import javafx.scene.control.Label;
import javafx.scene.control.TextField;
import javafx.scene.layout.Region;
import javafx.scene.layout.RowConstraints;
public class HideRowGridPaneController {
@FXML
private RowConstraints row2 ;
@FXML
private RowConstraints row4 ;
@FXML
private Label requiredLabel1 ;
@FXML
private TextField requiredTextField1 ;
@FXML
private Label requiredLabel2 ;
@FXML
private TextField requiredTextField2 ;
@FXML
private Label requiredLabel3 ;
@FXML
private TextField requiredTextField3 ;
@FXML
private Label optionalLabel1 ;
@FXML
private TextField optionalTextField1 ;
@FXML
private Label optionalLabel2 ;
@FXML
private TextField optionalTextField2 ;
@FXML
private CheckBox showOptional ;
public void initialize() {
Stream.of(optionalLabel1, optionalTextField1, optionalLabel2, optionalTextField2)
.forEach(n -> n.visibleProperty().bind(showOptional.selectedProperty()));
Stream.of(row2, row4)
.forEach(row -> {
row.minHeightProperty().bind(Bindings.when(showOptional.selectedProperty())
.then(Region.USE_PREF_SIZE)
.otherwise(0));
row.prefHeightProperty().bind(Bindings.when(showOptional.selectedProperty())
.then(Region.USE_COMPUTED_SIZE)
.otherwise(0));
row.maxHeightProperty().bind(Bindings.when(showOptional.selectedProperty())
.then(Region.USE_PREF_SIZE)
.otherwise(0));
});
}
}
应用：
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Scene;
import javafx.stage.Stage;
public class HideRowGridPane extends Application {
@Override
public void start(Stage primaryStage) throws Exception {
primaryStage.setScene(new Scene(FXMLLoader.load(getClass().getResource("HideRowGridPane.fxml")), 400, 400));
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
}
还有其他方法可以执行此操作，例如使用gridPane.getChildren().remove(...)从网格窗格中实际删除控件，并在执行此操作时手动重置下面组件的rowIndex属性。这可能有点棘手，但是可行。
答案 1 :(得分：0)
这是我根据自己的需要进行调整的一种方法。它不是FXML，但您可能会发现它很有用。
defaultRowSpan
如果您的行是倍数
（0，1，2，3，4，... defaultRowSpan = 1）
（0，2，4，6，8，... defaultRowSpan = 2）
private void deleteRow(GridPane grid, final int row)
{
Set<Node> deleteNodes = new HashSet<>();
for (Node child : grid.getChildren())
{
// get index from child
Integer rowIndex = GridPane.getRowIndex(child);
if(rowIndex == row)
{
deleteNodes.add(child);
}
}
// remove nodes from row
grid.getChildren().removeAll(deleteNodes);
// shift rows up
int i = row;
for (Node child : grid.getChildren())
{
int nodeRowIndex = GridPane.getRowIndex(child);
if(nodeRowIndex == (i + (defaultRowSpan * 2)))
{
i += defaultRowSpan;
}
if(nodeRowIndex > i)
{
GridPane.setRowIndex(child, i);
System.out.println("set row index: " + child + " , row: " + i);
}
}
}