I want to create three pop-up windows in JavaFX. These windows are almost the same, but they differ in styles. For example, the user deletion window has a black title field, green to activate the user, and red to block. I want to create only one such window in FXML, and then pass the styles as a parameter. How can I do this and is this even possible?
you can either create a custom dialog window or use javafx native dialog window
---------------here i i have created a custom dialog window and i change the colors and icons dynamically as i need
-------FXML-------------------
<?xml version="1.0" encoding="UTF-8"?>
<?import com.jfoenix.controls.JFXButton?>
<?import javafx.geometry.Insets?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.image.Image?>
<?import javafx.scene.image.ImageView?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.layout.ColumnConstraints?>
<?import javafx.scene.layout.GridPane?>
<?import javafx.scene.layout.HBox?>
<?import javafx.scene.layout.RowConstraints?>
<?import javafx.scene.text.Font?>
<GridPane xmlns:fx="http://javafx.com/fxml/1" style="-fx-border-color: red;" xmlns="http://javafx.com/javafx/8.0.141">
<columnConstraints>
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" />
</columnConstraints>
<rowConstraints>
<RowConstraints maxHeight="194.0" minHeight="10.0" prefHeight="117.0" vgrow="SOMETIMES" />
<RowConstraints maxHeight="113.0" minHeight="10.0" prefHeight="113.0" vgrow="SOMETIMES" />
</rowConstraints>
<children>
<AnchorPane prefHeight="113.0" prefWidth="400.0" style="-fx-background-color: e34c5e;">
<children>
<ImageView fitHeight="82.0" fitWidth="104.0" layoutX="153.0" layoutY="18.0" pickOnBounds="true" preserveRatio="true" AnchorPane.bottomAnchor="17.0" AnchorPane.leftAnchor="153.0" AnchorPane.rightAnchor="165.0" AnchorPane.topAnchor="18.0">
<image>
<Image url="#../Images/eror_icon.png" />
</image>
</ImageView>
</children></AnchorPane>
<AnchorPane layoutX="10.0" layoutY="10.0" prefHeight="129.0" prefWidth="400.0" style="-fx-background-color: white;" GridPane.rowIndex="1">
<children>
<GridPane layoutX="84.0" layoutY="-5.0" prefHeight="99.0" prefWidth="400.0" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0">
<columnConstraints>
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
</columnConstraints>
<rowConstraints>
<RowConstraints maxHeight="43.0" minHeight="10.0" prefHeight="39.0" vgrow="SOMETIMES" />
<RowConstraints maxHeight="27.0" minHeight="10.0" prefHeight="22.0" vgrow="SOMETIMES" />
<RowConstraints maxHeight="36.0" minHeight="10.0" prefHeight="36.0" vgrow="SOMETIMES" />
</rowConstraints>
<children>
<Label alignment="CENTER" contentDisplay="CENTER" prefHeight="50.0" prefWidth="401.0" text="Item Not Selected !">
<font>
<Font name="System Bold" size="19.0" />
</font>
</Label>
<Label alignment="CENTER" layoutX="10.0" layoutY="43.0" prefHeight="50.0" prefWidth="401.0" text="Item to Purchase Is Not Selected..Select an Item" GridPane.rowIndex="1" />
<HBox alignment="CENTER" prefHeight="100.0" prefWidth="200.0" GridPane.rowIndex="2">
<children>
<JFXButton fx:id="btnOk" buttonType="RAISED" onMouseClicked="#btnOkClicked" prefHeight="32.0" prefWidth="121.0" style="-fx-background-color: e34c5e; -fx-background-radius: 80;" text="Ok" textFill="WHITE">
<HBox.margin>
<Insets bottom="2.0" top="2.0" />
</HBox.margin>
<font>
<Font name="System Bold" size="15.0" />
</font>
</JFXButton>
</children>
</HBox>
</children>
</GridPane>
</children>
</AnchorPane>
</children>
</GridPane>
--------------------Controller--------
package Controllers;
import javafx.scene.control.Dialog;
import javafx.scene.input.MouseEvent;
import javafx.stage.Stage;
public class CustomAlertDialogBox {
private Dialog currentDialog;
public CustomAlertDialogBox(Dialog dialog) {
this.currentDialog = dialog;
}
public void btnOkClicked(MouseEvent mouseEvent) {
Stage stage = (Stage) currentDialog.getDialogPane().getScene().getWindow();
stage.close();
}
}
check this for native dialog box
http://code.makery.ch/blog/javafx-dialogs-official/
Related
Basically when i update my .fxml file, i can't see the new stuff...it's like showing the old version of the .fxml...with the old stuff... and yes i save the file...
This is my Main.java
package Library.Assistant.Ui.Main;
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;
public class MainLoader extends Application {
public static void main(String arg[]) {
launch(arg);
}
#Override
public void start(Stage stage) throws Exception {
Parent root = FXMLLoader.load(getClass().getResource("Main.fxml"));
Scene scene = new Scene(root);
stage.setScene(scene);
stage.show();
}
}
This is my Main.fxml
<?xml version="1.0" encoding="UTF-8"?>
<?import com.jfoenix.controls.JFXButton?>
<?import com.jfoenix.controls.JFXTextField?>
<?import javafx.geometry.Insets?>
<?import javafx.scene.control.Button?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.control.ListView?>
<?import javafx.scene.control.Menu?>
<?import javafx.scene.control.MenuBar?>
<?import javafx.scene.control.MenuItem?>
<?import javafx.scene.control.Tab?>
<?import javafx.scene.control.TabPane?>
<?import javafx.scene.control.TextField?>
<?import javafx.scene.image.Image?>
<?import javafx.scene.image.ImageView?>
<?import javafx.scene.layout.BorderPane?>
<?import javafx.scene.layout.ColumnConstraints?>
<?import javafx.scene.layout.GridPane?>
<?import javafx.scene.layout.HBox?>
<?import javafx.scene.layout.RowConstraints?>
<?import javafx.scene.layout.VBox?>
<VBox maxHeight="1.7976931348623157E308" maxWidth="1.7976931348623157E308" minHeight="-Infinity" minWidth="-Infinity" prefHeight="548.0" prefWidth="617.0" xmlns="http://javafx.com/javafx/11.0.1" xmlns:fx="http://javafx.com/fxml/1" fx:controller="Library.Assistant.Ui.Main.MainController">
<children>
<MenuBar maxHeight="1.7976931348623157E308" maxWidth="1.7976931348623157E308">
<menus>
<Menu mnemonicParsing="false" text="File">
<items>
<MenuItem mnemonicParsing="false" text="Close" />
</items>
</Menu>
<Menu mnemonicParsing="false" text="Edit">
<items>
<MenuItem mnemonicParsing="false" text="Delete" />
</items>
</Menu>
<Menu mnemonicParsing="false" text="Help">
<items>
<MenuItem mnemonicParsing="false" text="About" />
</items>
</Menu>
</menus>
</MenuBar>
<GridPane fx:id="grid" maxHeight="1.7976931348623157E308" maxWidth="1.7976931348623157E308" VBox.vgrow="ALWAYS">
<columnConstraints>
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
<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 minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
</rowConstraints>
<children>
<TabPane maxHeight="1.7976931348623157E308" maxWidth="1.7976931348623157E308" tabClosingPolicy="UNAVAILABLE" GridPane.rowSpan="2147483647">
<tabs>
<Tab text="Book Issue">
<content>
<VBox alignment="CENTER" prefHeight="200.0" prefWidth="100.0">
<children>
<HBox alignment="CENTER" maxHeight="1.7976931348623157E308" maxWidth="1.7976931348623157E308" VBox.vgrow="ALWAYS">
<children>
<TextField fx:id="enterBookID" promptText="Enter Book ID" />
<VBox alignment="CENTER" prefHeight="200.0" prefWidth="100.0" HBox.hgrow="ALWAYS">
<children>
<Label text="Book Name" />
<Label text="Author" />
</children>
</VBox>
</children>
</HBox>
<HBox alignment="CENTER" layoutX="10.0" layoutY="10.0" maxHeight="1.7976931348623157E308" maxWidth="1.7976931348623157E308" VBox.vgrow="ALWAYS">
<children>
<TextField promptText="Enter Member ID" />
<VBox alignment="CENTER" prefHeight="200.0" prefWidth="100.0" HBox.hgrow="ALWAYS">
<children>
<Label text="Member Name" />
<Label text="Contact" />
</children>
</VBox>
</children>
</HBox>
<HBox alignment="CENTER" layoutX="10.0" layoutY="404.0" maxHeight="1.7976931348623157E308" maxWidth="1.7976931348623157E308" VBox.vgrow="ALWAYS">
<children>
<JFXButton maxHeight="1.7976931348623157E308" maxWidth="1.7976931348623157E308" text="Issue" HBox.hgrow="ALWAYS" />
</children>
</HBox>
</children>
</VBox>
</content>
</Tab>
<Tab text="Renew / Submission">
<content>
<VBox maxHeight="1.7976931348623157E308" maxWidth="1.7976931348623157E308">
<children>
<BorderPane maxHeight="1.7976931348623157E308" maxWidth="1.7976931348623157E308" VBox.vgrow="ALWAYS">
<top>
<JFXTextField alignment="CENTER" promptText="Enter Book ID" BorderPane.alignment="CENTER">
<BorderPane.margin>
<Insets bottom="20.0" left="10.0" right="10.0" top="10.0" />
</BorderPane.margin>
</JFXTextField>
</top>
<center>
<ListView maxHeight="1.7976931348623157E308" maxWidth="1.7976931348623157E308" BorderPane.alignment="CENTER" />
</center>
<bottom>
<HBox maxHeight="1.7976931348623157E308" maxWidth="1.7976931348623157E308" BorderPane.alignment="CENTER">
<children>
<JFXButton maxHeight="1.7976931348623157E308" maxWidth="1.7976931348623157E308" text="Renew" HBox.hgrow="ALWAYS" />
<JFXButton maxHeight="1.7976931348623157E308" maxWidth="1.7976931348623157E308" text="Submission" HBox.hgrow="ALWAYS" />
</children>
<BorderPane.margin>
<Insets />
</BorderPane.margin>
</HBox>
</bottom>
</BorderPane>
</children>
</VBox>
</content>
</Tab>
</tabs>
</TabPane>
<Button contentDisplay="TOP" maxHeight="1.7976931348623157E308" maxWidth="1.7976931348623157E308" mnemonicParsing="false" text="Add Member" GridPane.columnIndex="1">
<graphic>
<ImageView fitHeight="50.0" fitWidth="50.0" pickOnBounds="true" preserveRatio="true">
<image>
<Image url="#add_mem.png" />
</image>
</ImageView>
</graphic>
</Button>
<Button contentDisplay="TOP" maxHeight="1.7976931348623157E308" maxWidth="1.7976931348623157E308" mnemonicParsing="false" text="Add Book" GridPane.columnIndex="1" GridPane.rowIndex="1">
<graphic>
<ImageView fitHeight="50.0" fitWidth="50.0" pickOnBounds="true" preserveRatio="true">
<image>
<Image url="#add_book.png" />
</image>
</ImageView>
</graphic>
</Button>
<Button contentDisplay="TOP" maxHeight="1.7976931348623157E308" maxWidth="1.7976931348623157E308" mnemonicParsing="false" text="View Members" GridPane.columnIndex="1" GridPane.rowIndex="2">
<graphic>
<ImageView fitHeight="50.0" fitWidth="50.0" pickOnBounds="true" preserveRatio="true">
<image>
<Image url="#list_mem.png" />
</image>
</ImageView>
</graphic>
</Button>
<Button contentDisplay="TOP" maxHeight="1.7976931348623157E308" maxWidth="1.7976931348623157E308" mnemonicParsing="false" text="View Books" GridPane.columnIndex="1" GridPane.rowIndex="3">
<graphic>
<ImageView fitHeight="50.0" fitWidth="50.0" pickOnBounds="true" preserveRatio="true">
<image>
<Image url="#list_book.png" />
</image>
</ImageView>
</graphic>
</Button>
<Button contentDisplay="TOP" maxHeight="1.7976931348623157E308" maxWidth="1.7976931348623157E308" mnemonicParsing="false" text="Settings" GridPane.columnIndex="1" GridPane.rowIndex="4">
<graphic>
<ImageView fitHeight="50.0" fitWidth="50.0" pickOnBounds="true" preserveRatio="true">
<image>
<Image url="#settings.png" />
</image>
</ImageView>
</graphic>
</Button>
</children>
</GridPane>
</children>
</VBox>
I just can't understand why it's showing the old version of the file...yesterday everything was working fine.I was adding new stuff and it was showing them properly, but today it keeps showing the version from yesterday...no matter how many stuff i change..
In scene builder preview button is on exact spot i.e bottom right corner without any gap but when i run my application there is gap.
Button is on a pane and pane is placed on top of anchor pane.
How can i fix this issue?
same thing happening with other components when i placed them on far right or far bottom.
Please examin the sample. Pay attention to min_width, min_height, pref_width, pref_height, max_width, max_height, vgrow, hgrow attributues in SceneBuiler.
The main concept is that type of pane you use sholud give you desired layout. It should not be hardcoded.
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.geometry.Insets?>
<?import javafx.scene.control.Button?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.control.TextField?>
<?import javafx.scene.layout.ColumnConstraints?>
<?import javafx.scene.layout.GridPane?>
<?import javafx.scene.layout.HBox?>
<?import javafx.scene.layout.RowConstraints?>
<?import javafx.scene.layout.StackPane?>
<?import javafx.scene.layout.VBox?>
<HBox maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="400.0" prefWidth="600.0" xmlns="http://javafx.com/javafx/8.0.171" xmlns:fx="http://javafx.com/fxml/1">
<children>
<VBox style="-fx-background-color: yellow;">
<children>
<StackPane VBox.vgrow="ALWAYS">
<children>
<Button mnemonicParsing="false" text="Menu Button" />
</children>
</StackPane>
<StackPane VBox.vgrow="ALWAYS">
<children>
<Button mnemonicParsing="false" text="Menu Button" />
</children>
</StackPane>
<StackPane layoutX="10.0" layoutY="210.0" VBox.vgrow="ALWAYS">
<children>
<Button mnemonicParsing="false" text="Menu Button" />
</children>
</StackPane>
<StackPane layoutX="10.0" layoutY="276.0" VBox.vgrow="ALWAYS">
<children>
<Button mnemonicParsing="false" text="Menu Button" />
</children>
<VBox.margin>
<Insets />
</VBox.margin>
</StackPane>
<StackPane layoutX="10.0" layoutY="310.0" VBox.vgrow="ALWAYS">
<children>
<Button mnemonicParsing="false" text="Menu Button" />
</children>
</StackPane>
</children>
</VBox>
<VBox style="-fx-background-color: red;" HBox.hgrow="ALWAYS">
<children>
<StackPane prefHeight="150.0" prefWidth="200.0" style="-fx-background-color: green;" VBox.vgrow="ALWAYS">
<children>
<GridPane maxHeight="-Infinity" maxWidth="-Infinity" style="-fx-background-color: purple;">
<columnConstraints>
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
<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>
<Label text="Label" />
<TextField GridPane.columnIndex="1" />
<TextField GridPane.columnIndex="1" GridPane.rowIndex="1" />
<TextField GridPane.columnIndex="1" GridPane.rowIndex="2" />
<Label text="Label" GridPane.rowIndex="1" />
<Label text="Label" GridPane.rowIndex="2" />
</children>
</GridPane>
</children>
</StackPane>
<HBox alignment="TOP_RIGHT">
<children>
<Button mnemonicParsing="false" text="Button" />
</children>
</HBox>
</children>
</VBox>
</children>
</HBox>
Have you put constraints in the layout section of the button? It could be related to that. Check layout x and layout of the button and the pref size x and y of AnchorPane, if that is same, the button must be on the left-bottom corner of the pane.
I have GridPane in my JavaFX window and I span two columns.
When I click on grid lines visible in scenebuilder there is line in the middle of merged cells.
How can I remove or not show this line?
Here is one approach: In this approach, I make the GridPane's background black. Then I stretch each Node to fill their Cell and make the Node's background white. Also on the GridPane, I set all the Insets to 5 and the VGap and HGap to 5. I suggest you use CSS and take #James_D's approach here.
FXML:
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.geometry.Insets?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.layout.ColumnConstraints?>
<?import javafx.scene.layout.GridPane?>
<?import javafx.scene.layout.RowConstraints?>
<GridPane hgap="5.0" maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="400.0" prefWidth="600.0" style="-fx-background-color: black;" vgap="5.0" xmlns:fx="http://javafx.com/fxml/1" xmlns="http://javafx.com/javafx/8.0.60">
<columnConstraints>
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
<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>
<Label alignment="CENTER" maxHeight="1.7976931348623157E308" maxWidth="1.7976931348623157E308" style="-fx-background-color: white;" text="Label" GridPane.columnSpan="2147483647" />
<Label alignment="CENTER" maxHeight="1.7976931348623157E308" maxWidth="1.7976931348623157E308" style="-fx-background-color: white;" text="Label" GridPane.rowIndex="1" />
<Label alignment="CENTER" maxHeight="1.7976931348623157E308" maxWidth="1.7976931348623157E308" style="-fx-background-color: white;" text="Label" GridPane.columnIndex="1" GridPane.rowIndex="1" />
<Label alignment="CENTER" maxHeight="1.7976931348623157E308" maxWidth="1.7976931348623157E308" style="-fx-background-color: white;" text="Label" GridPane.rowIndex="2" />
<Label alignment="CENTER" maxHeight="1.7976931348623157E308" maxWidth="1.7976931348623157E308" style="-fx-background-color: white;" text="Label" GridPane.columnIndex="1" GridPane.rowIndex="2" />
</children>
<padding>
<Insets bottom="5.0" left="5.0" right="5.0" top="5.0" />
</padding>
</GridPane>
But I would suggest you use CSS and follow #James_D's approach here.
I'm having this weird behavior when I run my JavaFx app:
As you can see the elements aren't properly aligned. I've created that view using SceneBuilder and there isn't that gap in the editor.
My view is composed of a GridPane. The right cells (on the pic) of the GridPane each contains an HBox, each containing elements (buttons / text fields). I haven't configured anything specific here and am not using any CSS.
Here's the full FXML:
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.text.*?>
<?import javafx.geometry.*?>
<?import javafx.scene.control.*?>
<?import java.lang.*?>
<?import javafx.scene.layout.*?>
<?import javafx.scene.layout.AnchorPane?>
<AnchorPane xmlns="http://javafx.com/javafx/8.0.40" xmlns:fx="http://javafx.com/fxml/1" fx:controller="MyController">
<children>
<GridPane hgap="3.0" vgap="3.0" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0">
<columnConstraints>
<ColumnConstraints hgrow="NEVER" />
<ColumnConstraints hgrow="NEVER" />
<ColumnConstraints hgrow="ALWAYS" />
</columnConstraints>
<rowConstraints>
<RowConstraints vgrow="SOMETIMES" />
<RowConstraints vgrow="SOMETIMES" />
<RowConstraints vgrow="SOMETIMES" />
</rowConstraints>
<children>
<Label text="label1" />
<Label text="label2" GridPane.rowIndex="1" />
<Button defaultButton="true" mnemonicParsing="false" onAction="#handleGo" text="Go!" GridPane.rowIndex="2">
<graphic>
<TextField fx:id="iterations" alignment="CENTER" prefWidth="43.0" style="-fx-padding: 0.166667em 0.333333em 0.166667em 0.333333em;" text="50000" />
</graphic></Button>
<Button fx:id="selectFileButton" maxWidth="1.7976931348623157E308" mnemonicParsing="false" onAction="#handleFileSelection" text="Select file" GridPane.columnIndex="1" GridPane.rowIndex="1" />
<HBox spacing="3.0" GridPane.columnIndex="2">
<children>
<TextField fx:id="customValue" editable="false" HBox.hgrow="ALWAYS" />
<Button fx:id="deleteButton" mnemonicParsing="false" onAction="#handleDelete" text="Delete" visible="false" />
</children>
</HBox>
<HBox spacing="3.0" GridPane.columnIndex="2" GridPane.rowIndex="1">
<children>
<Button fx:id="editButton" mnemonicParsing="false" text="Edit" />
<Button mnemonicParsing="false" text="New" />
</children>
</HBox>
<ComboBox fx:id="selection" maxWidth="1.7976931348623157E308" onAction="#handleSelection" GridPane.columnIndex="1" />
</children>
</GridPane>
</children>
</AnchorPane>
Am I missing something ?
The default alignment for controls in GridPane (Maybe for controls in general?) is CENTER_LEFT, while for HBox the default is TOP_LEFT. Adding
alignment="CENTER_LEFT"
to your HBox should align them properly.
I am trying to add datepicker field in .fxml (JavaFX). But I don't what is correct way to do?
Please help me how to add datepicker field in .fxml file.
<?xml version="1.0" encoding="UTF-8"?>
<?import java.lang.*?>
<?import java.util.*?>
<?import javafx.collections.*?>
<?import javafx.scene.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<AnchorPane id="AnchorPane" prefHeight="705.9998779296875" prefWidth="499.9998779296875" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="processbuilder.controler.NewActivityController">
<children>
<GridPane prefHeight="615.9998779296875" prefWidth="499.9998779296875" AnchorPane.bottomAnchor="90.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0">
<children>
<Label prefHeight="24.0" prefWidth="53.0" text="Name : " GridPane.columnIndex="0" GridPane.halignment="CENTER" GridPane.rowIndex="0" GridPane.valignment="CENTER" />
<Label text="Description :" translateY="30.0" GridPane.columnIndex="0" GridPane.halignment="CENTER" GridPane.rowIndex="1" GridPane.valignment="TOP" />
<TextField fx:id="name" prefWidth="200.0" GridPane.columnIndex="1" GridPane.rowIndex="0" />
<TextArea fx:id="desc" prefWidth="200.0" wrapText="true" GridPane.columnIndex="1" GridPane.rowIndex="1" />
<columnConstraints>
<ColumnConstraints hgrow="SOMETIMES" maxWidth="177.0" minWidth="10.0" prefWidth="76.0" />
<ColumnConstraints hgrow="SOMETIMES" maxWidth="394.0" minWidth="10.0" prefWidth="394.0" />
</columnConstraints>
<rowConstraints>
<RowConstraints maxHeight="194.0" minHeight="10.0" prefHeight="49.0" vgrow="SOMETIMES" />
<RowConstraints maxHeight="317.0" minHeight="10.0" prefHeight="265.0" vgrow="SOMETIMES" />
<RowConstraints maxHeight="194.0" minHeight="10.0" prefHeight="42.0" vgrow="SOMETIMES" />
<RowConstraints maxHeight="261.0" minHeight="10.0" prefHeight="261.0" vgrow="SOMETIMES" />
</rowConstraints>
</GridPane>
<Button fx:id="create" mnemonicParsing="false" onAction="#handleCreateActivity" prefWidth="64.0" text="Create" AnchorPane.bottomAnchor="30.0" AnchorPane.leftAnchor="345.0" AnchorPane.rightAnchor="91.0" />
<Button fx:id="cancel" mnemonicParsing="false" onAction="#handleCancel" prefHeight="20.9998779296875" prefWidth="63.9998779296875" text="Cancel" AnchorPane.bottomAnchor="30.0" AnchorPane.leftAnchor="116.0" AnchorPane.rightAnchor="320.0" />
<Button fx:id="modify" layoutX="345.0" layoutY="655.0" mnemonicParsing="false" onAction="#handleModify" prefWidth="63.9998779296875" text="Modify" visible="false" />
</children>
</AnchorPane>
Just use a DatePicker tag to add a DatePicker in your fxml
A sample example where I have added a DatePicker to the provided FXML is:
<?xml version="1.0" encoding="UTF-8"?>
<?import java.lang.*?>
<?import java.util.*?>
<?import javafx.collections.*?>
<?import javafx.scene.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<AnchorPane id="AnchorPane" prefHeight="705.9998779296875" prefWidth="499.9998779296875" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1">
<children>
<GridPane prefHeight="615.9998779296875" prefWidth="499.9998779296875" AnchorPane.bottomAnchor="90.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0">
<children>
<Label prefHeight="24.0" prefWidth="53.0" text="Name : " GridPane.columnIndex="0" GridPane.halignment="CENTER" GridPane.rowIndex="0" GridPane.valignment="CENTER" />
<Label text="Description :" translateY="30.0" GridPane.columnIndex="0" GridPane.halignment="CENTER" GridPane.rowIndex="1" GridPane.valignment="TOP" />
<TextField fx:id="name" prefWidth="200.0" GridPane.columnIndex="1" GridPane.rowIndex="0" />
<TextArea fx:id="desc" prefWidth="200.0" wrapText="true" GridPane.columnIndex="1" GridPane.rowIndex="1" />
<Label prefHeight="24.0" prefWidth="87.0" text="DatePicker : " GridPane.halignment="CENTER" GridPane.rowIndex="2" GridPane.valignment="CENTER" />
<DatePicker fx:id="datepicker" GridPane.columnIndex="1" GridPane.rowIndex="2" />
</children>
<columnConstraints>
<ColumnConstraints hgrow="SOMETIMES" maxWidth="177.0" minWidth="10.0" prefWidth="76.0" />
<ColumnConstraints hgrow="SOMETIMES" maxWidth="394.0" minWidth="10.0" prefWidth="394.0" />
</columnConstraints>
<rowConstraints>
<RowConstraints maxHeight="194.0" minHeight="10.0" prefHeight="49.0" vgrow="SOMETIMES" />
<RowConstraints maxHeight="317.0" minHeight="10.0" prefHeight="265.0" vgrow="SOMETIMES" />
<RowConstraints maxHeight="194.0" minHeight="10.0" prefHeight="42.0" vgrow="SOMETIMES" />
<RowConstraints maxHeight="261.0" minHeight="10.0" prefHeight="261.0" vgrow="SOMETIMES" />
</rowConstraints>
</GridPane>
<Button fx:id="create" mnemonicParsing="false" onAction="#handleCreateActivity" prefWidth="64.0" text="Create" AnchorPane.bottomAnchor="30.0" AnchorPane.leftAnchor="345.0" AnchorPane.rightAnchor="91.0" />
<Button fx:id="cancel" mnemonicParsing="false" onAction="#handleCancel" prefHeight="20.9998779296875" prefWidth="63.9998779296875" text="Cancel" AnchorPane.bottomAnchor="30.0" AnchorPane.leftAnchor="116.0" AnchorPane.rightAnchor="320.0" />
<Button fx:id="modify" layoutX="345.0" layoutY="655.0" mnemonicParsing="false" onAction="#handleModify" prefWidth="63.9998779296875" text="Modify" visible="false" />
</children>
</AnchorPane>
<DatePicker xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" />
But if you work with FXML you should use the Scene Builder, which is a WYSIWYG editor.