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    JavaFX dialog

    In JavaFX, a dialog wraps down a DialogPane and offers the required API to give it to end-users. This class has one generic type, R, that denotes the result property type. A dialog can be organized for adding content, adding buttons, setting modality, and state the blocking as well as non-blocking behavior of the dialog. Several properties can be gain access to and set by the API of the dialog– header text, title, content text, width/height, location, resizable, and the content graphic or header graphic.

    Let us see more on the JavaFX dialog in the below sections:

    Syntax:

    Below is the syntax used for JavaFXdialog.

    Dialog< String> dg = new Dialog< String>();

    Constructors

    Following is the constructor of JavaFX dialog.

    Dialog():

    A dialog will be created without an identified owner.

    Methods

    Below are the common methods used in JavaFXdialog.

    • buildEventDispatchChain(EventDispatchChaintail)

      An Event Dispatch Chain will be constructed for the target.

    • close()

      Dialog will be hidden.

    • contentTextProperty()

      For the dialog, this property denotes a content text.

    • getDialogPane()

      dialogPane property’s value will be retrieved.

    • dialogPaneProperty()

      Dialog’s root node, the pane consists of all visual items depicted in the dialog.

    • getGraphic()

      graphic property’s value will be retrieved.

    • getContentText()

      currently-set text content will be returned for the dialog pane.

    • getHeaderText()

      currently-set header content will be returned for the dialog pane.

    • getHeight()

      Dialog’s height will be returned.

    • getModality()

      Dialog’s modality attribute will be returned.

    • getOnCloseRequest()

      onCloseRequest property’s value will be retrieved.

    • getOnHidden()

      onHidden property’s value will be retrieved.

    • getOnHiding()

      onHiding property’s value will be retrieved.

    • getOnShowing()

      onShowing property’s value will be retrieved.

    • getOnShown()

      onShown property’s value will be retrieved.

    • getResult()

      result property’s value will be retrieved.

    • getResultConverter()

      resultConverter property’s value will be retrieved.

    • getX()

      x property’s value will be retrieved.

    • getY()

      y property’s value will be retrieved.

    • getOwner()

      Dialog’s owner window will be retrieved or if unowned, null will be retrieved.

    • getTitle()

      Dialog’s title will be retrieved.

    • getWidth()

      Dialog’s width will be retrieved.

    • hide()

      Dialog will be closed.

    • headerTextProperty()

      Dialog pane’s header text will be represented by this property.

    • heightProperty()

      Dialog pane’s height will be represented by this property.

    • initModality(Modalitymodality)

      Dialog’s modality will be specified.

    • initOwner(Windowwindow)

      Dialog’s owner Window will be specified or if top-level unowned, null will be retrieved.

    • initStyle(StageStylestyle)

      Dialog’s style will be specified.

    • isResizable()

      Dialog’s resize ability will be returned. That is, checks whether it is resizable or not.

    • isShowing()

      Dialog’s display ability will be returned. That is, checks whether it is shown or not.

    • onCloseRequestProperty()

      If there is an external request for closing the dialog is present, this property will be called.

    • onHiddenProperty()

      After dialog is hidden, this property will be called.

    • onHidingProperty()

      Before dialog is hidden, this property will be called.

    • onShowingProperty()

      Before dialog is shown, this property will be called.

    • onShownProperty()

      After dialog is shown, this property will be called.

    • resizableProperty()

      Dialog’s resize ability will be returned.

    • resultProperty()

      Dialog’s return value will be checked when this property is called.

    • setContentText(StringcontentText)

      String that has to be displayed in the content area of the dialog will be set.

    • setDialogPane(DialogPanevalue)

      Dialog pane’s value will be set by this property.

    • setHeaderText(StringheaderText)

      String that has to be displayed in the header area of the dialog will be set.

    • setHeight(double height)

      Dialog’s height will be set.

    • setOnCloseRequest(EventHandler< DialogEvent> value)

      onCloseRequest property’s value will be set.

    • setOnHidden(EventHandler< DialogEvent> value)

      onHidden property’s value will be set.

    • setOnHiding(EventHandler< DialogEvent> value)

      onHiding property’s value will be set.

    • setOnShowing(EventHandler< DialogEvent> value)

      onShowing property’s value will be set.

    • setOnShown(EventHandler< DialogEvent> value)

      onShown property’s value will be set.

    • setResizable(boolean resizable)

      dialog’s resize ability by the user will be set.

    • setResult(Rvalue)

      result property’s value will be set.

    • setResultConverter(Callback< ButtonType,R> value)

      resultConverter property’s value will be set.

    • setX(double x)

      x property’s value will be set.

    • setY(double y)

      y property’s value will be set.

    • setTitle(Stringtitle)

      Dialog’s title will be set.

    • setWidth(double width)

      Dialog’s width will be set.

    • setGraphic(Nodegraphic)

      dialog graphic will be set that will be shown in header if that is displaying or to the content left side.

    • show()

      Dialog will be shown but won’t wait for response of the user.

    • showAndWait()

      Dialog will be shown and wait for response of the user.

    • showingProperty()

      This property denotes whether the dialog is currently displaying.

    • titleProperty()

      Dialog’s title property will be returned.

    • widthProperty()

      Dialog’s width property will be returned.

    • xProperty()

      Dialog’s horizontal location.

    • yProperty()

      Dialog’s vertical location.

    Example

    Let us see a sample program for creating a JavaFX dialog.

    Code:

    //JavaFXprorgram that demonstrates the dg
    //import all necessary classes
    import javafx.application.Application;
    import javafx.geometry.Insets;
    import javafx.scene.Group;
    import javafx.scene.Scene;
    import javafx.scene.control.Button;
    import javafx.scene.control.ButtonBar.ButtonData;
    import javafx.scene.control.ButtonType;
    import javafx.scene.control.Dialog;
    import javafx.scene.layout.HBox;
    import javafx.stage.Stage;
    import javafx.scene.paint.Color;
    import javafx.scene.text.Font;
    import javafx.scene.text.FontPosture;
    import javafx.scene.text.FontWeight;
    import javafx.scene.text.Text;
    //main class
    public class DialogProgram extends Application {
    //starts here...
    @Override
    public void start(Stage st)
    {
    //dialog creation
    Dialog< String> dg = new Dialog< String>();
    //set title
    dg.setTitle("Sample dialog");
    ButtonTypebt = new ButtonType("Click", ButtonData.OK_DONE);
    //Set dialog content
    dg.setContentText("dialog sample for demo");
    //To the dialog pane, add the buttons
    dg.getDialogPane().getButtonTypes().add(bt);
    //Set the label
    Text tt = new Text("Please click on the button for displaying the dialog");
    //set the font
    Fontfn = Font.font("verdana", FontWeight.BOLD, FontPosture.ITALIC, 14);
    tt.setFont(fn);
    //Create a button
    Buttonbtn = new Button("Dialog display");
    //Dialog display on button clicking
    btn.setOnAction(e -> {
    dg.showAndWait();
    });
    //create a hbox for holding button as well as label
    HBoxpn = new HBox(14);
    //Set the space seperating the nodes of a pane
    pn.setPadding(new Insets(60, 160, 60, 70));
    //add children
    pn.getChildren().addAll(tt, btn);
    //Create a scene object
    Scene sc = new Scene(new Group(pn), 596, 252, Color.RED);
    //set the title
    st.setTitle("Dialogg");
    //set the scene
    st.setScene(sc);
    st.show();
    }
    public static void main(String args[]){
    launch(args);
    }
    }
    

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