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Thread: Problems with JavaFX viewport

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    Exclamation Problems with JavaFX viewport

    Hi All,

    I'm having problems with two objects from the same image that are supposed to be viewable side-by-side with viewport constraint. The first image object shows but not the second.

    https://gist.github.com/anonymous/ee...a72e59487a5a5f

    There are no syntax errors and it compiles but it is a logic issue. gull image can be substituted for any picture as long as its in same folder as the script.

    P.S. the IDE above does not work for FX, it will have to be run in another IDE.
    Last edited by bebexx; March 17th, 2018 at 12:32 PM.

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    Default Re: Problems with JavaFX viewport

    Also posted at: JavaFX Viewport Issues

    Try removing the unused code and also some of the minor methods. Pass two objects to the StackPane constructor.
    I did and was able to get the two images to display.
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Problems with JavaFX viewport

    https://gist.github.com/9080a576efc0...923f5374e193ca

    Hi I removed the second StackPane so that the two objects only run through the first. Commenting out the viewports resulted in one full image.

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    Default Re: Problems with JavaFX viewport

    Please post any code here wrapped in code tags that you want to talk about.
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Problems with JavaFX viewport

    import javafx.application.Application;
    import javafx.event.ActionEvent;
    import javafx.event.EventHandler;
    import javafx.scene.Scene;
    import javafx.scene.control.Button;
    import javafx.scene.layout.StackPane;
    import javafx.stage.Stage;
    import javafx.scene.image.Image;
    import javafx.scene.image.ImageView;
    import javafx.geometry.Rectangle2D;
     
    public class PP4o11TEST extends Application {
     
     
        public void start(Stage primaryStage) 
        {
     
        Image img= new Image("gull.jpg");
        ImageView imgView = new ImageView(getClass().getResource("gull.jpg").toExternalForm());
     
        Image img2= new Image("gull.jpg");
        ImageView imgView2 = new ImageView(getClass().getResource("gull.jpg").toExternalForm());;
     
        imgView.setViewport(new Rectangle2D(200,80,70,60));
        imgView2.setViewport(new Rectangle2D(400,100,30,90));
     
        StackPane pane= new StackPane(imgView,imgView2);
        pane.setStyle("-fx-background-color:cornsilk");
     
        Scene scene= new Scene(pane, 500, 350);
     
        primaryStage.setTitle("Viewport Gull");
        primaryStage.setScene(scene);
        primaryStage.show();
        }
    }

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    Default Re: Problems with JavaFX viewport

    What is the WxH of the gull.jpg image? Need that to consider the setViewport calls.

    Why are you using the StackPane class? What does the API doc say about what that class does?

    What is the purpose of the unused Image objects?
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Problems with JavaFX viewport

    The WxH is 400 x 265 px.

    StackPane determines the position of the children element...perhaps I should use a FlowPane instead
    https://docs.oracle.com/javafx/2/lay...s.htm#CHDGHCDG

    If you mean for the viewport with Rectangle 2D that was for the constraint. Otherwise it was initalized so that the objects could be referenced for ImageView

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    Default Re: Problems with JavaFX viewport

    StackPane determines the position of the children element.
    Yes, but where does it position them?
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    Default Re: Problems with JavaFX viewport

    Hmm it says that it overlaps one each other like text placed over an image. But there is an alignment that can make it look like this https://docs.oracle.com/javafx/2/lay...hbox_stack.png

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    Default Re: Problems with JavaFX viewport

    perhaps I should use a FlowPane
    Did you try that?
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    Default Re: Problems with JavaFX viewport

    Yes but I figured out it's the viewport that's causing the issue so I removed the second viewport. I'm curious as to how you've resolved it using Stackpane? The code already looks very close to completion

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    Default Re: Problems with JavaFX viewport

    I used FlowPane to get side-by-side images. StackPane stacked the images on top of each other.
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Problems with JavaFX viewport

    Same, based on the description StackPane would be more suitable for text ontop of an object or image.

    I switched over to FlowPane and got rid of the second viewport. Works now with a Group and call to children objects.

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