LogoPanel.java

package kubach.gui;

import java.awt.Color;
import java.awt.Component;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Insets;
import java.awt.RenderingHints;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.Random;
import javax.imageio.ImageIO;
import javax.swing.JEditorPane;
import javax.swing.JPanel;
import kubach.ConfigManager;

/**
 * Panel with logo
 * @author Cr0s
 */
public class LogoPanel extends JPanel {

    private BufferedImage bg, logo;
    
    private ChangelogPanel cp;
    /**
     * Creates new form LogoPanel
     */
    public LogoPanel(Component parent) {
        initComponents();
        
        this.setLayout(null);
        
        this.setBackground(new Color(0f,0f,0f));
        this.setSize(parent.getSize());
        this.setPreferredSize(parent.getPreferredSize());        
        
        try {
            File imgDir = new File(ConfigManager.getInstance().pathToJar + File.separatorChar + "pics");
            if (imgDir.exists() && imgDir.isDirectory()) {
                File[] files = imgDir.listFiles();
                
                if (files.length > 0) {
                    File imgFile = files[(new Random().nextInt(files.length))];
                    bg = ImageIO.read(imgFile);
                }
            }
        } catch (IOException e) { }       
        
        try {
            logo = ImageIO.read(LogoPanel.class.getClassLoader().getResource("logo.png"));
        } catch (IOException e) {
            e.printStackTrace();
        }        
        
        logo = resize(logo, this.getSize().width, this.getSize().height);
        bg  = resize(bg, this.getSize().width, this.getSize().height);
        
        this.cp = new ChangelogPanel(this);
        // Set location inside parent
        Insets i = getInsets();
        
        this.add(cp);
        
        int h = cp.getPreferredSize().height;
        cp.setBounds(2 + i.left, this.getPreferredSize().height - h + i.top, this.getPreferredSize().width - (this.getPreferredSize().width / 4), h);        
    }

    public static int getContentHeight(String content) {
        JEditorPane dummyEditorPane=new JEditorPane();
        dummyEditorPane.setSize(100,Short.MAX_VALUE);
        dummyEditorPane.setText(content);
        
        return dummyEditorPane.getPreferredSize().height;
    }    
    
    @Override
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);
        if (bg != null) { 
            g.drawImage(bg,0,0,null);
        }
        
        g.drawImage(logo,0,0,null);
        
        //cp.paintComponent(g);
    }    
    
    public static BufferedImage resize(BufferedImage image, int width, int height) {
        BufferedImage bi = new BufferedImage(width, height, BufferedImage.TRANSLUCENT);
        Graphics2D g2d = (Graphics2D) bi.createGraphics();
        g2d.addRenderingHints(new RenderingHints(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY));
        g2d.drawImage(image, 0, 0, width, height, null);
        g2d.dispose();
        return bi;
    }    
    
    /**
     * This method is called from within the constructor to initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is always
     * regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
    private void initComponents() {

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(this);
        this.setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 400, Short.MAX_VALUE)
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 300, Short.MAX_VALUE)
        );
    }// </editor-fold>//GEN-END:initComponents
    // Variables declaration - do not modify//GEN-BEGIN:variables
    // End of variables declaration//GEN-END:variables
}