网格中的可见按钮

Question

我的gridpane是：

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

<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>

<AnchorPane id="AnchorPane" maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="569.0" prefWidth="794.0" xmlns:fx="http://javafx.com/fxml/1" xmlns="http://javafx.com/javafx/2.2" fx:controller="com.controller.test">
  <children>
    <GridPane layoutX="10.0" layoutY="270.0" prefWidth="775.0" rotate="0.0">
      <children>
        <Button fx:id="btn1" mnemonicParsing="false" prefWidth="67.0" rotate="0.0" text="btn1" GridPane.columnIndex="0" GridPane.rowIndex="0" />
        <Button fx:id="btn2" mnemonicParsing="false" prefWidth="67.0" rotate="0.0" text="btn2" GridPane.columnIndex="1" GridPane.rowIndex="0" />
        <Button fx:id="btn3" mnemonicParsing="false" prefWidth="67.0" rotate="0.0" text="btn3" GridPane.columnIndex="2" GridPane.rowIndex="0" />
        <Button fx:id="btn4" mnemonicParsing="false" prefWidth="67.0" rotate="0.0" text="btn4" GridPane.columnIndex="3" GridPane.rowIndex="0" />
      </children>
      <columnConstraints>
        <ColumnConstraints maxWidth="594.0" minWidth="10.0" prefWidth="69.0" />
        <ColumnConstraints maxWidth="594.0" minWidth="10.0" prefWidth="69.0" />
        <ColumnConstraints maxWidth="558.0" minWidth="10.0" prefWidth="67.0" />
        <ColumnConstraints maxWidth="507.0" minWidth="10.0" prefWidth="507.0" />
      </columnConstraints>
      <rowConstraints>
        <RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
      </rowConstraints>
    </GridPane>
  </children>
</AnchorPane>

我需要btn1，btn2可见（false）时的结果如下图所示

我使用场景构建器。感谢

Answer 1

除了通过将visible属性设置为false（＆＃39; visible =＆＃34; false＆＃34;＆＃39;）使组件不可见之外，您还将托管属性设置为false（managed =＆ ＃34; false＆＃34;）。但是明确的＃Column; ColumnConstraints＆＃39;在你的fxml中，＆＃39; managed = false＆＃39;不会有效果。因此，您可能希望避免使用ColumnConstraints，而是使用GridPane子组件的属性来设置维度。