RE: [ULC-developer] paintComponent and JPanel

[Janak Mulani]

Hi Alan,

Firstly, ULC is a server-side GUI library and you cannot use Swing Widgets
in your server-side ULC application.

You have to use ULC widgets like ULCButton, ULCFrame etc. to build the GUI
of your application. ULC offers different layout panels (equivalent of
JPanel with layout) - ULCBoxPane, ULCGridBagLayoutPane, ULCFlowLayoutPane,
ULCBoxLayoutPane etc.

In case you want to customize a ULC widget, you need to create an
extension of the ULC widget which involves creating a server side proxy
and a client side proxy. This is described in the ULC Extension Guide.

At the end of this mail you will find a sample code snippet.

Thanks and regards,

Janak


________________________________________
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of alan aherne
Sent: Thursday, April 03, 2008 5:20 AM
To: ulc-developer@lists.canoo.com
Subject: [ULC-developer] paintComponent and JPanel




Hi,
I am new to ULC and am having some problems with my first few attempts to
check if ULC will work for my planned software. I need to use
paintComponent as in the basic 'MyPanel' example below. I have searched
the old posts here and found an example that uses 'UiJPanel' that would
seem to be an option, however I can't find the 'import
com.ulcjava.base.client.UiJPanel'.
Can somebody please point me in the right direction. Is there a ULC
substitute for JPanel ?? If not is there any examples as to how I go about
painting a grid or likewise that would help me get started.
Thank you for any help.
Al
package painting;

import javax.swing.SwingUtilities;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.BorderFactory;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;

public class SwingPaintDemo2 {

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                createAndShowGUI();
            }
        });
    }

    private static void createAndShowGUI() {
        System.out.println("Created GUI on EDT? "+
        SwingUtilities.isEventDispatchThread());
        JFrame f = new JFrame("Swing Paint Demo");
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.add(new MyPanel());
        f.pack();
        f.setVisible(true);
    }
}


class MyPanel extends JPanel {

    public MyPanel() {
        setBorder(BorderFactory.createLineBorder(Color.black));
    }

    public Dimension getPreferredSize() {
        return new Dimension(250,200);
    }

    public void paintComponent(Graphics g) {
        super.paintComponent(g);

        // Draw Text
        g.drawString("This is my custom Panel!",10,20);
    }
}
-----------------------------------------------



import java.awt.Graphics;

import com.ulcjava.base.application.AbstractApplication;
import com.ulcjava.base.application.ULCBoxPane;
import com.ulcjava.base.application.ULCButton;
import com.ulcjava.base.application.ULCFrame;
import com.ulcjava.base.application.event.ActionEvent;
import com.ulcjava.base.application.event.IActionListener;
import com.ulcjava.base.client.UIGridBagLayoutPane;
import com.ulcjava.base.development.DevelopmentRunner;

public class PaintPanelSnippet extends AbstractApplication {
    public void start() {
        final ULCBoxPane pane = new ULCMyBoxPane();

        ULCButton button = new ULCButton("Button");
        button.addActionListener(new IActionListener() {
            public void actionPerformed(ActionEvent event) {
            }
        });

        pane.add(ULCBoxPane.BOX_CENTER_CENTER, button);

        ULCFrame frame = new ULCFrame("TableNoDataSnippet");
        frame.setDefaultCloseOperation(ULCFrame.TERMINATE_ON_CLOSE);
        frame.add(pane);
        frame.setSize(300, 300);
        frame.setVisible(true);

    }

    public static void main(String[] args) {
        DevelopmentRunner.setApplicationClass(PaintPanelSnippet.class);
        DevelopmentRunner.run();
    }

    // server side class
    public static class ULCMyBoxPane extends ULCBoxPane {
        protected String typeString() {
            return UIMyBoxPane.class.getName();
            // replace with fully qualified name string of client side
class
        }
    }

    // client side class
    public static class UIMyBoxPane extends UIGridBagLayoutPane {
        protected Object createBasicObject(Object[] arguments) {
            return new MyBasicPane();
        }

        public class MyBasicPane extends BasicGridBagLayoutPane {
            public void paint(Graphics g) {
                super.paint(g);
                g.drawString("This is my custom Panel!", 10, 20);
            }
        }
    }
}