for background of my question, I am working with COMSOL, a finite element software, which you can run with java without ever opening the software. Because of this, I am trying to couple it with another software written in java and run in Eclipse. My problem is having COMSOL generate an image file, say on my desktop of a 2D simulation. The code for exporting a *.txt file is almost identical and works, but it does not work for images and I wanted to see if someone could help get me thinking of where to look to figure out how to accomplish this.
I have attached ## snippets of code that I think explain enough of what I am trying to do without bogging all of you down.
import com.comsol.model.*;
import com.comsol.model.util.*;
/** Model exported on Jul 24 2012, 13:33 by COMSOL 4.2.1.110. */
public class COMSOL_Model {
public static Model run() {
Model model = ModelUtil.create("Model");
//code to set up and solve the model
// and then at the end, you tell COMSOL what to export...
//this code works...
model.result("pg1").feature("glob1").set("data", "dset"+i);
model.result().export("plot1").set("filename", C:\\Users\\Alex\\Desktop\\temp_data_"+i+".txt");
model.result().export("plot1").run();
//this code does NOT work
model.result("pg2").feature("surf1").set("data", "dset"+i);
model.result("pg2").set("window", "window"+i);
model.result("pg2").run();
model.result().export().create("img"+i, "Image2D");
model.result("pg2").set("window", "graphics");
model.result("pg2").set("windowtitle", "");
model.result().export("img"+i)
.set("pngfilename", "C:\\Users\\Alex\\Desktop\\surface.png");
model.result().export("img1").run();
So my first question is, can someone maybe explain why, theoretically or with code as to why this does not work? I'm guessing because I would need a special method like "ImageIO.write". Any hints or thoughts would be greatly appreciated.
I tried getting around this by COMSOL provides code to create a GUI that shows the progress of the simulation and then prints, for example, a 2D/3D image on the GUI. I have used this in a big 'for' loop where java creates a GUI and a new plot for each iteration. The problem is, I can get java to copy the frame and progress bar and everything of the GUI except the picture that is printed on it and I wanted to see if anyone had any suggestions. My one idea was have java take a screenshot but and then crop the image. Any thoughts?
The following is most of the code with comments where I thought was necessary:
import com.comsol.model.*;
import com.comsol.model.util.*;
import com.comsol.modelguiswing.SwingGraphicsPanel;
import java.awt.BorderLayout;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GraphicsConfiguration;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import java.awt.Transparency;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.JPanel;
import javax.swing.UIManager;
import javax.swing.*;
public class reuse_solver {
//paste this into configurations
//C:\Program Files\COMSOL\COMSOL42a\lib\win64
private Model model;
public static void main(String[] args) {
reuse_solver recycler= new reuse_solver();
recycler.init();
recycler.looper();
}
public void looper() {
model = original.run();
for (int iSimul = 1; iSimul<5; iSimul++){
start(iSimul);
}
}
//this is the code to have eclipse run comsol
private void init() {
ModelUtil.initStandalone(true);
}
private void start(int iSimul) {
if (iSimul==1){
Progress(iSimul);
synchronized(model){
try {
model.wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}else{
Studier(iSimul);
Progress(iSimul);
synchronized(model){
try {
model.wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
/this creates the GUI and then runs COMSOL, showing the progress
private void Progress(int i){
final String sol = "sol"+i;
final int k = i;
lookandfeel();
final JFrame frame = new JFrame("This is an example GUI for Frying");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(1000, 730);
final JPanel mainPanel = new JPanel();
frame.getContentPane().add(mainPanel);
mainPanel.setLayout(new BorderLayout());
final SwingGraphicsPanel graphicsPanel = new SwingGraphicsPanel("window"+i, "Window"+i);
mainPanel.add(graphicsPanel, BorderLayout.CENTER);
SwingProgressPanel progressPanel =new SwingProgressPanel();
mainPanel.add(progressPanel, BorderLayout.PAGE_END);
progressPanel.updateProgressLog("Starting\n"+i+"\n");
ProgressWorker.setContext(new SwingDemoProgressContext(progressPanel));
final int pWidth = frame.getWidth();
final int pHeight = frame.getHeight();
frame.setVisible(true);
ProgressWorker.run(new Runnable() {
public void run() {
model.sol(sol).feature().create("t1","PlotWhileSolving");
model.sol(sol).runAll();
exporter(k, pHeight, pWidth, frame);
}
});
}
//code to help COMSOL run in a loop
private void Studier(int i) {
//COMSOL code goes here
}
private void exporter(int i, int pHeight, int pWidth, JFrame frame) {
//this code will tell java to put the image in the GUI window once the simulation is done
model.result("pg2").feature("surf1").set("data", "dset"+i);
model.result("pg2").set("window", "window"+i);
model.result("pg2").run();
// this will generate an image on my desktop, but it will not put the image that was put in the GUI
BufferedImage bi = new BufferedImage(pWidth,pHeight, BufferedImage.TYPE_INT_RGB);
Graphics g = bi.createGraphics();
frame.paint(g); //this == JComponent
g.dispose();
try{ImageIO.write(bi,"png",new File("C:\\Users\\Alex\\Desktop\\surf_"+i+".png"));}catch (Exception e) {}
synchronized(model){
model.notify();
}
}
private void lookandfeel() {
try {
UIManager.setLookAndFeel(
UIManager.getSystemLookAndFeelClassName());
}
catch (Exception e) {
}
}
}
