我有fxml文件，它会在右下方显示弹出窗口。但起初我的fxml大小是500 * 700。如果我将该文件设置为最大值，那么HBox应该从右下角开始，但是现在它正处于初始位置。
如何根据屏幕使HBox浮动？
<?xml version="1.0" encoding="UTF-8"?>
<VBox minHeight="600.0" prefWidth="800.0" stylesheets="@NonRepudiation.css" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1">
<children>
<!-- <HBox> -->
<!-- <padding> -->
<!-- <Insets bottom="5.0" left="5.0" right="5.0" top="20.0" /> -->
<!-- </padding> -->
<!-- </HBox> -->
<HBox>
<children>
<TitledPane animated="true" layoutY="34.0" minWidth="-Infinity" prefHeight="580.0" prefWidth="366.0" style="-fx-font-weight: bold;" text="Filter Criteria" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.topAnchor="64.0">
<content>
<AnchorPane maxWidth="-Infinity" minWidth="-Infinity" prefHeight="580.0" prefWidth="356.0">
<children>
<TitledPane animated="true" minWidth="-Infinity" style="-fx-font-weight: bold;" styleClass="hiddenHeader" text="Filter Criteria" translateX="-20.0">
<font>
<Font name="Calibri Bold" size="11.0" />
</font>
</TitledPane>
<VBox prefHeight="580.0" prefWidth="359.0" style="-fx-font-weight: bold;">
<children>
<TitledPane animated="true" prefHeight="145.0" prefWidth="359.0" style="-fx-font-weight: bold;" styleClass="custom-pane" text="Quick Search">
<content>
<AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="90.0" prefWidth="357.0">
<children>
<VBox layoutX="10.0" layoutY="20.0">
<children>
<!--<HBox layoutX="10.0" layoutY="0.0" prefHeight="35.0"
prefWidth="318.0" spacing="8.0" styleClass="vbox-column"> <children> <Label
prefHeight="14.0" prefWidth="94.0" text="Value Date From"> <HBox.margin>
<Insets right="2.0" top="5.0" /> </HBox.margin> </Label> <DatePicker prefWidth="94.0"
/> <Label prefHeight="14.0" prefWidth="20.0" text=" To"> <HBox.margin> <Insets
top="5.0" /> </HBox.margin> </Label> <DatePicker prefWidth="94.0" /> </children>
<padding> <Insets top="10.0" /> </padding> </HBox> -->
<HBox layoutX="10.0" layoutY="20.0" prefHeight="35.0" prefWidth="345.0" spacing="8.0" styleClass="vbox-column">
<children>
<Label prefHeight="14.0" prefWidth="91.0" text="Deal Number">
<HBox.margin>
<Insets right="2.0" top="5.0" />
</HBox.margin>
</Label>
<TextField fx:id="dealNumber" prefWidth="160.0" />
</children>
<padding>
<Insets top="10.0" />
</padding>
</HBox>
<HBox layoutX="10.0" layoutY="50.0" prefHeight="35.0" prefWidth="345.0" spacing="8.0" styleClass="vbox-column">
<children>
<Label prefHeight="14.0" prefWidth="91.0" text="Digest Reference">
<HBox.margin>
<Insets right="2.0" top="5.0" />
</HBox.margin>
</Label>
<TextField fx:id="digestReference" prefWidth="160.0" />
<Button maxHeight="-Infinity" minHeight="22.0" mnemonicParsing="false" onAction="#onQuickSearch" styleClass="advancedRedButton" text="Search" />
</children>
<padding>
<Insets top="10.0" />
</padding>
</HBox>
</children>
</VBox>
</children>
</AnchorPane>
</content>
</TitledPane>
<TitledPane animated="true" prefHeight="430.0" prefWidth="359.0" style="-fx-border-width: 1 1 0 1;" styleClass="custom-pane" text="Advanced Search">
<content>
<AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="580.0" prefWidth="357.0">
<children>
<HBox layoutX="7.0" layoutY="1.0" prefHeight="336.0" prefWidth="341.0">
<children>
<GridPane hgap="3.0" layoutX="6.6" layoutY="40.0" prefHeight="223.0" prefWidth="341.0" vgap="1.0" AnchorPane.bottomAnchor="30.0" AnchorPane.leftAnchor="-3.0" AnchorPane.rightAnchor="-10.0" AnchorPane.topAnchor="51.0">
<columnConstraints>
<ColumnConstraints hgrow="SOMETIMES" maxWidth="132.99999237060547" minWidth="10.0" prefWidth="122.0" />
<ColumnConstraints hgrow="SOMETIMES" maxWidth="101.0" minWidth="10.0" prefWidth="92.0" />
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
</columnConstraints>
<rowConstraints>
<RowConstraints maxHeight="43.0" minHeight="7.0" prefHeight="22.0" vgrow="SOMETIMES" />
<RowConstraints maxHeight="88.0" minHeight="10.0" prefHeight="28.0" vgrow="SOMETIMES" />
<RowConstraints maxHeight="107.0" minHeight="10.0" prefHeight="29.0" vgrow="SOMETIMES" />
<RowConstraints maxHeight="119.0" minHeight="10.0" prefHeight="29.0" vgrow="SOMETIMES" />
<RowConstraints maxHeight="133.0" minHeight="0.0" prefHeight="20.0" vgrow="SOMETIMES" />
<RowConstraints maxHeight="138.0" minHeight="0.0" prefHeight="79.0" vgrow="SOMETIMES" />
</rowConstraints>
<children>
<Text strokeType="OUTSIDE" strokeWidth="0.0" style="-fx-font-weight: bold; -fx-font-size: 14px;" text="Field" textAlignment="CENTER" wrappingWidth="35.9765625" GridPane.halignment="CENTER" GridPane.valignment="CENTER">
</Text>
<Text strokeType="OUTSIDE" strokeWidth="0.0" style="-fx-font-weight: bold; -fx-font-size: 14px;" text="Operator" GridPane.columnIndex="1" GridPane.halignment="CENTER">
</Text>
<Text strokeType="OUTSIDE" strokeWidth="0.0" style="-fx-font-weight: bold; -fx-font-size: 14px;" text="Value" GridPane.columnIndex="2" GridPane.halignment="CENTER">
</Text>
<ComboBox fx:id="advOperator1" prefWidth="150.0" promptText="Select Operator" GridPane.columnIndex="1" GridPane.rowIndex="1">
<items>
<FXCollections fx:factory="observableArrayList">
<String fx:value="IN" />
<String fx:value="NOT IN" />
<String fx:value="EQUALS" />
<String fx:value="NOT EQUALS" />
<String fx:value="LESS THAN" />
<String fx:value="LESS THAN EQUALS" />
<String fx:value="GREATER THAN" />
<String fx:value="GREATER THAN EQUALS" />
</FXCollections>
</items>
</ComboBox>
<ComboBox fx:id="advOperator2" prefWidth="150.0" promptText="Select Operator" GridPane.columnIndex="1" GridPane.rowIndex="2">
<items>
<FXCollections fx:factory="observableArrayList">
<String fx:value="IN" />
<String fx:value="NOT IN" />
<String fx:value="EQUALS" />
<String fx:value="NOT EQUALS" />
<String fx:value="LESS THAN" />
<String fx:value="LESS THAN EQUALS" />
<String fx:value="GREATER THAN" />
<String fx:value="GREATER THAN EQUALS" />
</FXCollections>
</items>
</ComboBox>
<ComboBox fx:id="advOperator3" prefWidth="150.0" promptText="Select Operator" GridPane.columnIndex="1" GridPane.rowIndex="3">
<items>
<FXCollections fx:factory="observableArrayList">
<String fx:value="IN" />
<String fx:value="NOT IN" />
<String fx:value="EQUALS" />
<String fx:value="NOT EQUALS" />
<String fx:value="LESS THAN" />
<String fx:value="LESS THAN EQUALS" />
<String fx:value="GREATER THAN" />
<String fx:value="GREATER THAN EQUALS" />
</FXCollections>
</items>
</ComboBox>
<!-- <ComboBox prefWidth="150.0" promptText="Message Type"
GridPane.rowIndex="5" /> <ComboBox prefWidth="150.0" promptText="Equals"
GridPane.columnIndex="1" GridPane.rowIndex="5" /> <ComboBox prefWidth="150.0"
promptText="CCY" GridPane.rowIndex="6" /> <ComboBox prefWidth="150.0" promptText="IN"
GridPane.columnIndex="1" GridPane.rowIndex="6" /> -->
<TextField GridPane.columnIndex="2" GridPane.rowIndex="1" />
<TextField GridPane.columnIndex="2" GridPane.rowIndex="2" />
<TextField fx:id="advText1" GridPane.columnIndex="2" GridPane.rowIndex="1" />
<TextField fx:id="advText2" GridPane.columnIndex="2" GridPane.rowIndex="2" />
<TextField fx:id="advText3" GridPane.columnIndex="2" GridPane.rowIndex="3" />
<Label text="Select Field" GridPane.rowIndex="1">
<GridPane.margin>
<Insets left="5.0" />
</GridPane.margin>
</Label>
<Label text="Select Field" GridPane.rowIndex="2">
<GridPane.margin>
<Insets left="5.0" />
</GridPane.margin>
</Label>
<Label text="Select Field" GridPane.rowIndex="3">
<padding>
<Insets left="5.0" />
</padding>
</Label>
<Label text="Update Date" GridPane.rowIndex="4">
<padding>
<Insets left="5.0" />
</padding>
</Label>
<!-- <TextField GridPane.columnIndex="2" GridPane.rowIndex="4"
/> <TextField GridPane.columnIndex="2" GridPane.rowIndex="6" /> -->
</children>
</GridPane>
</children>
</HBox>
<HBox layoutX="7.0" layoutY="245.0" prefHeight="35.0" prefWidth="348.0">
<children>
<Text layoutX="7.0" layoutY="250.0" strokeType="OUTSIDE" strokeWidth="0.0" text="Template Name">
<HBox.margin>
<Insets right="5.0" top="9.0" />
</HBox.margin>
</Text>
<ComboBox layoutX="94.0" layoutY="319.0" prefWidth="248.0" promptText="Default Template">
<items>
<FXCollections fx:factory="observableArrayList">
<String fx:value="Private" />
<String fx:value="Public" />
</FXCollections>
</items>
<HBox.margin>
<Insets left="7.0" />
</HBox.margin>
</ComboBox>
</children>
</HBox>
<HBox layoutX="7.0" layoutY="285.0" prefHeight="35.0" prefWidth="348.0">
<children>
<Text strokeType="OUTSIDE" strokeWidth="0.0" text="Type of template">
<HBox.margin>
<Insets top="9.0" />
</HBox.margin>
</Text>
<ComboBox prefWidth="248.0" promptText="Public">
<HBox.margin>
<Insets left="5.0" />
</HBox.margin>
</ComboBox>
</children>
</HBox>
<HBox layoutX="5.0" layoutY="325.0" prefHeight="45.0" prefWidth="352.0">
<children>
<Button mnemonicParsing="false" prefHeight="45.0" prefWidth="67.0" styleClass="advancedRedButton" text="Save Template" textAlignment="CENTER" wrapText="true" />
<Button mnemonicParsing="false" prefHeight="45.0" prefWidth="67.0" styleClass="advancedRedButton" text="Edit Template" textAlignment="CENTER" wrapText="true">
<HBox.margin>
<Insets left="8.0" />
</HBox.margin>
</Button>
<Button mnemonicParsing="false" prefHeight="45.0" prefWidth="67.0" styleClass="advancedRedButton" text="Delete Template" textAlignment="CENTER" wrapText="true">
<HBox.margin>
<Insets left="8.0" />
</HBox.margin>
</Button>
<Button mnemonicParsing="false" prefHeight="45.0" prefWidth="55.0" styleClass="advancedRedButton" text="Clear" textAlignment="CENTER" wrapText="true">
<HBox.margin>
<Insets left="8.0" />
</HBox.margin>
</Button>
<Button mnemonicParsing="false" onAction="#onAdvancedSearch" prefHeight="45.0" prefWidth="55.0" styleClass="advancedRedButton" text="Search">
<HBox.margin>
<Insets left="8.0" />
</HBox.margin>
</Button>
</children>
</HBox>
<HBox layoutX="140.0" layoutY="206.0" prefHeight="22.0" prefWidth="251.0">
<children>
<DatePicker layoutX="28.0" layoutY="230.0" prefWidth="92.0">
<HBox.margin>
<Insets right="5.0" />
</HBox.margin>
</DatePicker>
<Text layoutX="131.0" layoutY="247.0" strokeType="OUTSIDE" strokeWidth="0.0" text="To">
<HBox.margin>
<Insets right="5.0" top="5.0" />
</HBox.margin>
</Text>
<DatePicker layoutX="173.0" layoutY="232.0" prefWidth="92.0" />
</children>
</HBox>
</children>
</AnchorPane>
</content>
</TitledPane>
</children>
</VBox>
</children>
</AnchorPane>
</content>
<graphic>
<Label layoutX="-20.0" styleClass="triggerLink" text="Filter Criteria" />
</graphic>
<styleClass>
<String fx:value="arrowPane" />
<String fx:value="greyBorder" />
</styleClass>
</TitledPane>
<AnchorPane minHeight="500.0" minWidth="434.0" HBox.hgrow="ALWAYS">
<children>
<HBox fillHeight="true" minHeight="500.0" minWidth="434.0" styleClass="greyBorder" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0" HBox.hgrow="ALWAYS">
<children>
<TableView fx:id="tableView" HBox.hgrow="ALWAYS" VBox.vgrow="ALWAYS">
<columns>
<TableColumn style="-fx-font-family: Calibri; -fx-font-size: 11px;" text="MessageId">
<cellValueFactory>
<PropertyValueFactory property="messageId" />
</cellValueFactory>
</TableColumn>
<TableColumn prefWidth="110.0" style="-fx-font-family: Calibri; -fx-font-size: 11px;" text="Digest Reference">
<cellValueFactory>
<PropertyValueFactory property="digestReference" />
</cellValueFactory>
</TableColumn>
<TableColumn prefWidth="115.0" style="-fx-font-family: Calibri; -fx-font-size: 11px;" text="Message Reference">
<cellValueFactory>
<PropertyValueFactory property="messageRef" />
</cellValueFactory>
</TableColumn>
<TableColumn prefWidth="115.0" style="-fx-font-family: Calibri; -fx-font-size: 11px;" text="Deal Number">
<cellValueFactory>
<PropertyValueFactory property="dealNo" />
</cellValueFactory>
</TableColumn>
<TableColumn style="-fx-font-family: Calibri; -fx-font-size: 11px;" text="Digest Value">
<cellValueFactory>
<PropertyValueFactory property="digestValue" />
</cellValueFactory>
</TableColumn>
<TableColumn prefWidth="100.0" style="-fx-font-family: Calibri; -fx-font-size: 11px;" text="Updated Date Time">
<cellValueFactory>
<PropertyValueFactory property="updateTime" />
</cellValueFactory>
</TableColumn>
</columns>
</TableView>
</children>
</HBox>
<HBox fx:id="columnConfigHbox" fillHeight="false" layoutX="310.0" layoutY="427.0">
<children>
<TableView fx:id="columnConfigTable" prefHeight="150.0" prefWidth="110.0" styleClass="noBorderRight" HBox.hgrow="ALWAYS" VBox.vgrow="ALWAYS">
<columns>
<TableColumn editable="false" minWidth="80.0" prefWidth="90.0" sortable="false" style="-fx-font-family: Calibri; -fx-font-size: 11px;" text="Column Config">
<cellValueFactory>
<PropertyValueFactory property="columnConfig" />
</cellValueFactory>
</TableColumn>
</columns>
<columnResizePolicy>
<TableView fx:constant="CONSTRAINED_RESIZE_POLICY" />
</columnResizePolicy>
</TableView>
<Button minHeight="15.0" minWidth="15.0" mnemonicParsing="false" onAction="#closeThis" styleClass="closeThis" />
</children>
</HBox>
<!-- <GridPane fx:id="columnConfig" layoutX="320.0" layoutY="480.0" visible="false">
<columnConstraints>
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
</columnConstraints>
<rowConstraints>
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
</rowConstraints>
<children>
<Text strokeType="OUTSIDE" strokeWidth="0.0" text="CCY" />
<Text strokeType="OUTSIDE" strokeWidth="0.0" text="CCY Amount" GridPane.rowIndex="1" />
<Text strokeType="OUTSIDE" strokeWidth="0.0" text="CTR CCY" GridPane.rowIndex="2" />
</children>
</GridPane> -->
</children>
</AnchorPane>
</children>
</HBox>
</children>
<styleClass>
<!-- <String fx:value="Sapphire" /> -->
<String fx:value="defaultFont" />
</styleClass>
</VBox>