ToolBarButton.java

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package app.navigps.gui.buttons;

import app.navigps.utils.OutputVerboseStream;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.GradientPaint;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Paint;
import java.awt.RenderingHints;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.geom.Rectangle2D;
import java.awt.geom.RoundRectangle2D;
import javax.swing.Action;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;

/**
 *
 * @author vara
 */
public class ToolBarButton extends JButton implements MouseListener,ChangeListener{
    
    private boolean mouseOnButton = false;
    private boolean mousePressedButton = false;

    private GradientPaint[] gradientOnButton = new GradientPaint[2];
    private GradientPaint[] gradientPressedButtion = new GradientPaint[2];
    private Rectangle2D [] recForGradient = new Rectangle2D[2];
    private Dimension oldSize = null;
    private RoundRectangle2D borderOnButton;

    private float roundCorner = 12.0f;

    /**
     *
     * @param a
     * @param i
     */
    public ToolBarButton(Action a,ImageIcon i){
	
        super(a);
        setIcon(i);
        setText("");
        setFocusPainted(false);
        setBorderPainted(false);
        if(a.isEnabled())
            addMouseListener(this);

        addChangeListener(this);
        setContentAreaFilled(false);
        
    }

    private void updateMyUI(){
        oldSize = getSize();
        gradientOnButton[0] = new GradientPaint(0.0f, (float) getHeight()/4,new Color(250,250,255),
                                                0.0f, 0.0f, new Color(224,234,255));
        gradientOnButton[1] = new GradientPaint(0.0f, (float) getHeight()/3, new Color(250,250,255),
                                                0.0f, (float) getHeight(), new Color(174,201,255));

        gradientPressedButtion[0] = new GradientPaint(0.0f, (float) getHeight()/4,new Color(255,255,255),
                                                      0.0f, 0.0f, new Color(124,134,155));
        gradientPressedButtion[1] = new GradientPaint(0.0f, (float) getHeight()/3, new Color(255,255,255),
                                                      0.0f, (float) getHeight(), new Color(74,101,155));

        recForGradient[0] = new Rectangle2D.Double(0, 0, getWidth(), getHeight()/3);
        recForGradient[1] = new Rectangle2D.Double(0, getHeight()/3, getWidth(), getHeight());
        borderOnButton    = new RoundRectangle2D.Double(1,2, getWidth()-2, getHeight()-4, roundCorner,roundCorner);
    }

    @Override
    public void paintComponent(Graphics g){
        //super.paintComponent(g);

        if(isEnabled()){
            final Graphics2D g2 = (Graphics2D) g.create();
            g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,RenderingHints.VALUE_ANTIALIAS_ON);
            g2.setColor(getBackground());
            g2.fillRect(0, 0, getWidth(), getHeight());

            int icox= (getWidth()-getIcon().getIconWidth())>>1;
            int icoy= (getHeight()-getIcon().getIconHeight())>>1;

            if(oldSize==null || oldSize.getHeight()!=getHeight() || oldSize.getWidth()!=getWidth())
                updateMyUI();
            
            if(isMouseOnButton()){
                Paint oldPaint = g2.getPaint();
                g2.setClip(borderOnButton);
                GradientPaint [] gradient = null;
                Color borderColor = null;
                
                if(mousePressedButton){
                    borderColor = new Color(25, 25, 25);
                    gradient = gradientPressedButtion;
                    icox+=2;
                    icoy+=2;
                }else{                    
                    borderColor = new Color(155, 155, 155);
                    gradient = gradientOnButton;
                }

                for(int i=0;i<gradient.length && i<recForGradient.length;i++){
                    g2.setPaint(gradient[i]);
                    g2.fill(recForGradient[i]);
                }
                g2.setPaint(oldPaint);
                g2.setClip(0, 0,getWidth(),getHeight());
                g2.setColor(borderColor);
                g2.draw(borderOnButton);

            }
            getIcon().paintIcon(this, g2,icox,icoy);
            g2.dispose();
        }else
            super.paintComponent(g);
    }

    @Override
    public void mouseClicked(MouseEvent e) {}
    @Override
    public void mousePressed(MouseEvent e) {
        mousePressedButton = true;
    }
    @Override
    public void mouseReleased(MouseEvent e) {
        
        mousePressedButton = false;
    }
    @Override
    public void mouseEntered(MouseEvent e) {
        setMouseOnButton(true);
    }

    @Override
    public void mouseExited(MouseEvent e) {
        setMouseOnButton(false);
    }

    /**
     *
     * @return
     */
    protected boolean isMouseOnButton() {
        return mouseOnButton;
    }

    /**
     *
     * @param mouseOnButton
     */
    protected void setMouseOnButton(boolean mouseOnButton) {
        this.mouseOnButton = mouseOnButton;
    }

    @Override
    public void setEnabled(boolean b){
        super.setEnabled(b);
        if(b)
            addMouseListener(this);
        else
            removeMouseListener(this);
        
        //System.out.println(getAction().getValue(Action.NAME)+" isEnabled "+b);
    }

    @Override
    public void stateChanged(ChangeEvent e) {
        //System.out.print("ChangeEvent ");
        //System.out.println(((JButton)e.getSource()).getAction().getValue(Action.NAME)+" is selected "+((JButton)e.getSource()).isSelected());
    }
}