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Home » Eclipse Projects » WindowBuilder » Viewing custom components?(Is there a way to see in design mode a custom JPanel used for drawing?)
icon5.gif  Viewing custom components? [message #1425008] Tue, 16 September 2014 18:48 Go to next message
Antoine Dubuc is currently offline Antoine DubucFriend
Messages: 1
Registered: September 2014
Junior Member
Hello Everyone,

I am using WindowsBuilder and ApplicationWindows for each of my forms.

I have to write an application that draws a preview of what will be printed.

I have a custom JPanel I use to draw on and it does not show up in Design view.

Is there a way to change that?

Thank you,


ps: The code below shows the proof of concept (yes, drawing is possible in Java) and works in Eclipse/JavaEE

package views;

import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.Rectangle;
import java.util.ArrayList;
import java.util.Iterator;

import javax.swing.*;
import java.awt.Toolkit;
import com.jgoodies.forms.factories.DefaultComponentFactory;
import java.awt.BorderLayout;

public class appMainWindow
	class PdfLocation
		public double xPos;
		public double yPos; 
	class DrawCanvas extends JPanel
	      public void paintComponent(Graphics g) 
	         for (PdfLocation p : PdfLocations)
	        	 g.drawRect((int)p.xPos, (int)p.yPos, 35, 20);
	public void AddRectangle()
		PdfLocation rect = new PdfLocation();
		if (PdfLocations.isEmpty() == false)
			PdfLocation spot = PdfLocations.get(PdfLocations.size() - 1);
			rect.xPos = spot.xPos + 45;
			rect.yPos = 10;
			rect.xPos = 10;
			rect.yPos = 10;			

	private JFrame frame;
	public ArrayList<PdfLocation> PdfLocations = new  ArrayList<PdfLocation>();
	public int PdfImagesCount = 0;

	public static final int CANVAS_HEIGHT = 700;
	public static final int CANVAS_WIDTH = 1000;
	private DrawCanvas canvas;
	private JLabel lblPdfCount;
	private JButton btnOk;
	public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { public void run() { try { appMainWindow window = new appMainWindow(); window.frame.setVisible(true); } catch (Exception e) { e.printStackTrace(); } } }); }

	public appMainWindow() 
		// Set up a custom drawing JPanel
	    canvas = new DrawCanvas();
	    canvas.setBounds(150, 25, CANVAS_WIDTH, CANVAS_HEIGHT);

	private void initialize() 
		frame = new JFrame();
		frame.setBounds(100, 100, 1200, 728);
		frame.setTitle("Shaareable Apps Presents ~ Pdf Imposition Monster");
		JMenuBar menuBar = new JMenuBar();
		JMenu mnMenu = new JMenu("Menu");
		JMenuItem mntmTest = new JMenuItem("test");
		mntmTest.setIcon(new ImageIcon(appMainWindow.class.getResource("/icons/Blue-Monster-icon.png")));
		lblPdfCount = new JLabel("");
		lblPdfCount.setBounds(92, 325, 61, 16);
		btnOk = new JButton("ok");
		btnOk.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent arg0) 
		btnOk.setBounds(22, 172, 75, 29);
Re: Viewing custom components? [message #1425202 is a reply to message #1425008] Wed, 17 September 2014 01:45 Go to previous message
Eric Clayberg is currently offline Eric ClaybergFriend
Messages: 979
Registered: July 2009
Location: Boston, MA
Senior Member
WindowBuilder is only going to display the static representation of any window/panel you are editing. None of your custom drawing code is executed in that context (intentionally).
Previous Topic:WindowBuilder crashes.
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