I am trying to make a program for visual analyzing Fractal sets. I choose Processing 3 as drawing library and JavaFX for the user interface. There are some screenshots of the current state:
My GUI:
there is Launcher code:
import Graphics.Canvas2D;
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;
import processing.core.PGraphics;
import java.io.IOException;
public class Launcher extends Application {
private static Stage primaryStage;
public static void main(String[] args) {
launch(args);
}
@Override
public void start(Stage primaryStage) {
Parent root = loadFXML("MainUI.fxml");
Scene scene = new Scene(root, 500, 400);
primaryStage.setTitle("Fractal Analyzer");
primaryStage.setScene(scene);
primaryStage.show();
primaryStage.setMaximized(true);
Launcher.primaryStage = primaryStage;
}
@Override
public void init() {
}
@Override
public void stop() {
System.exit(0);
}
public static Stage getPrimaryStage() {
return primaryStage;
}
public void setCanvas(Canvas2D canvas){
}
private Parent loadFXML(String path) {
try {
return FXMLLoader.load(getClass().getResource(path));
} catch (IOException e) {
e.printStackTrace();
}
System.exit(1);
return null;
}
}
Testing fractal PAplet:
There is a code of this PAplet:
package Fractal;
import processing.core.PApplet;
public class SirpenskiTriangle extends PApplet {
public static void main(String[] args) {
PApplet.main("Fractal.SirpenskiTriangle");
}
public void settings() {
size(640, 640);
smooth();
if (frame != null) {
frame.setResizable(true);
}
}
public void draw() {
drawTriangle(new Position(300, 20), new Position(620, 620), new Position(20, 620), 0);
noLoop();
scale(10f);
}
public void setup(){}
public void drawTriangle(Position top, Position right, Position left, int depth) {
if (depth > 10) return;
line(top.x, top.y, right.x, right.y);
line(right.x, right.y, left.x, left.y);
line(left.x, left.y, top.x, top.y);
drawTriangle(top, top.middleWith(right), top.middleWith(left), depth + 1);
drawTriangle(top.middleWith(left), left.middleWith(right), left, depth + 1);
drawTriangle(top.middleWith(right), right, left.middleWith(right), depth + 1);
}
class Position {
final float x;
final float y;
Position(float x, float y) {
this.x = x;
this.y = y;
}
Position middleWith(Position other) {
return new Position((x + other.x) / 2, (y + other.y) / 2);
}
}
}
Is there any way to put processing PAplet into JavaFX scene like canvas or something similar?
I hope it can work like this, but this code is invalid:
You'll have to download a slightly modified core.jar for this to work, where I've changed the visibility of a few members of the PSurfaceFX and PGraphicsFX2D classes from Protected to Public. The changes allow us to launch JavaFX from our own ... extends Application class, while maintaining access to the members that Processing needs to set during the launch to function.
Processing 3 crashes in FX2D mode when the JDK in use is above Java 8, so I've also made a working version for 8+, since the FXML files usually need at least Java 9 to work.
This is the FXML file I am working with in this example:
With the modified core.jar added to your project's classpath, override initSurface() in your PApplet class with the following snippet. With this code, we bypass the PApplet's call to initFrame() - this is where processing creates its own JavaFX stage, which we do not want it to do.
@Override
protected PSurface initSurface() {
g = createPrimaryGraphics();
PSurface genericSurface = g.createSurface();
PSurfaceFX fxSurface = (PSurfaceFX) genericSurface;
fxSurface.sketch = this;
Launcher.surface = fxSurface;
new Thread(new Runnable() {
public void run() {
Application.launch(Launcher.class);
}
}).start();
while (fxSurface.stage == null) {
try {
Thread.sleep(5);
} catch (InterruptedException e) {
}
}
this.surface = fxSurface;
return fxSurface;
}
Set the PApplet's renderering mode to FX2D like so:
@Override
public void settings() {
size(0, 0, FX2D);
}
Put the following, or similar, in your Launcher class. In this example, I have manually found the Node that I want to add the canvas object into. There are better, more programmatic, ways of doing this (such as .lookup() using the fx:id of the desired node). I have also bound the dimensions of the canvas to those of its parent, so when the divisor separating the Master and View panes is dragged, the canvas resizes accordingly.
public class Launcher extends Application {
public static PSurfaceFX surface;
@Override
public void start(Stage primaryStage) throws Exception {
Canvas canvas = (Canvas) surface.getNative(); // boilerplate
GraphicsContext graphicsContext = canvas.getGraphicsContext2D(); // boilerplate
surface.fx.context = graphicsContext; // boilerplate
primaryStage.setTitle("FXML/Processing");
VBox root = FXMLLoader.load(new File("c:/Users/Mike/desktop/test.fxml").toURI().toURL());
SplitPane pane = (SplitPane) root.getChildren().get(1); // Manually get the item I want to add canvas to
AnchorPane pane2 = (AnchorPane) pane.getItems().get(0); // Manually get the item I want to add canvas to
pane2.getChildren().add(canvas); // Manually get the item I want to add canvas to
canvas.widthProperty().bind(pane2.widthProperty());
canvas.heightProperty().bind(pane2.heightProperty());
Scene scene = new Scene(root, 800, 800);
primaryStage.setScene(scene);
primaryStage.show();
surface.stage = primaryStage; // boilerplate
}
}
This is the result:
To make it work, you have to launch your Processing sketch, not the JavaFX Application.
Simply do
PApplet.main(Launcher.class.getName());
Also thanks so much for your help! I had NO idea how I should use the JavaFX stuff that comes with Processing!
Okay, this is my code, that works! I copied everything and changed the names. !!!I have not tested this modified code, so don't copy paste everything!!! The raw principle should definetly work though.
If you still have issues or questions, just comment.
Main
public class Main {
public static void main(String[] args) {
// Your code starts here, and runs Processing.
// This is also, how you normally start Processing sketches.
PApplet.main(Sketch.class.getName());
}
}
Sketch
public class Sketch extends PApplet{
@Override
public void settings() {
size(200, 200, FX2D); // Size doesn't really matter
}
@Override
public void setup() {
}
@Override
public void draw() {
}
// Processing uses this function to determine,
// how to display everything, how to open the canvas...
// We override the code, that would normally open a window with the normal Processing stuff,
// to open start new JavaFX application in a new Thread.
// micycle's code
@Override
protected PSurface initSurface() {
g = createPrimaryGraphics();
PSurface genericSurface = g.createSurface();
PSurfaceFX fxSurface = (PSurfaceFX) genericSurface;
fxSurface.sketch = this;
// Because the JavaFX App is being launched by reflection,
// we can't pass variables to it via constructor, so
// we have to access it in static context.
// Here, we give JavaFX the surface.
ExampleApp.surface = fxSurface;
// New thread started, so JavaFX and Processing don't interrupt each other.
new Thread(new Runnable() {
public void run() {
// JavaFX way of launching a new Application
Application.launch(ExampleApp.class);
}
}).start();
while (fxSurface.stage == null) {
try {
Thread.sleep(5);
} catch (InterruptedException e) {
}
}
this.surface = fxSurface;
return fxSurface;
}
}
ExampleApp
public class ExampleApp extends Application {
public Canvas canvas; // The Canvas you will be drawing to
public static PSurfaceFX surface; // The Processing surface
// JavaFX started, this method is being run to set everything up.
@Override
public void start(Stage primaryStage) {
// This sets up the canvas, and the drawing region.
canvas = (Canvas) surface.getNative();
surface.fx.context = canvas.getGraphicsContext2D();
surface.stage = primaryStage;
// I'm just loading my FXML file. You can do all JavaFX stuff via code, if you want
try {
// !!My root Container is a BorderPane!!
BorderPane root = FXMLLoader.load(getClass().getClassLoader().getResource("application.fxml"));
} catch(IOException e) {
e.printStackTrace();
}
// Getting the Anchor pane, that is in the center of my BorderPane
AnchorPane pane = (AnchorPane) root.getCenter();
// The Anchor pane is being used, so the canvas can fill the parent (Center)
// Canvases don't have a property to fill it's parent, like most Containers do (Because it isn't a container)
canvas.widthProperty().bind(pane.widthProperty());
canvas.heightProperty().bind(pane.heightProperty());
// Adding the canvas to your App
root.getChildren().add(canvas);
// Launching the Stage
primaryStage.setTitle("Example App");
primaryStage.setScene(new Scene(root));
primaryStage.show();
}
}
Okay, since last time , I changed some elements. The canvas's parent is now just a Pane instead of an AnchorPane.
The FXML won't help you much... It is just a BorderPane with another Pane in it, but alright...
<center>
<VBox prefHeight="200.0" prefWidth="100.0" BorderPane.alignment="CENTER">
<children>
<Pane maxHeight="1.7976931348623157E308" VBox.vgrow="ALWAYS" />
</children>
</VBox>
So, what I'm doing is taking the Canvas element, Processing creates and just adding it to the Pane.
来源：https://stackoverflow.com/questions/52709779/java-processing-3-paplet-in-javafx-scene-as-fxnode