While writing some of the samples in which we have to play with images, we sometimes has to manage the depth of the images. Like for the Carousel example, every image has a depth. In that example, actually images are not overlapping with each other, so we never need to write the Z-Order concept. But if someone want to write a Carousel or some application in which Images are residing over other images, we need to set the Z-order of Images. Z-Order in literal term means depth-ness of images. JavaFX gracefully provide API's to set the Z-order of images. With a simple call, you can set the images toFront or toBack features.
In this example, I have taken 3 images and try to set the depth-ness of images on the event of Buttons.
First Image on Top Second Image on Top
Third Image on Top
Here is the code to set the Z-Order :
package zorder;
import javafx.scene.Group;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.paint.Color;
import javafx.scene.Scene;
import javafx.stage.Stage;
import javafx.scene.shape.Rectangle;
import javafx.scene.input.MouseEvent;
import javafx.ext.swing.SwingButton;
var im1 = ImageView {
x: 100
y: 100
image: Image {
url: "{__DIR__}im1.PNG"
}
opacity: 0.8
};
var im2 = ImageView {
x: 130
y: 130
image: Image {
url: "{__DIR__}im2.PNG"
}
opacity: 0.8
};
var im3 = ImageView {
x: 160
y: 160
image: Image {
url: "{__DIR__}im3.PNG"
}
opacity: 0.8
};
var gp = Group {
content:[
im1, im2,im3
]
}
Stage {
title: "Application title"
width: 400
height: 400
scene: Scene {
fill: Color.BLACK
content: [
gp,
SwingButton {
translateX: 10
translateY: 10
text: "Image 1"
action: function() {
im1.toFront();
}
}
SwingButton {
translateX: 90
translateY: 10
text: "Image 2"
action: function() {
im2.toFront();
}
}
SwingButton {
translateX: 170
translateY: 10
text: "Image 3"
action: function() {
im3.toFront();
}
}
]
}
}
From next blog, I will use applet or JNLP in place of images, as suggested by Dmitry in last blog. Pictures make it bulky and uneasy to load. But I was getting some problem in deploying the application on Sun blog which will be rectified soon.
