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package org.netbeans.modules.consumervisualvm.engine;
import java.awt.Cursor;
import java.awt.Dimension;
import java.awt.Point;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import javax.swing.Icon;
import javax.swing.JComponent;
import javax.swing.JToolTip;
import org.openide.util.RequestProcessor;
import org.openide.util.RequestProcessor.Task;
// Copied from org.netbeans.core.FlashingIcon
/**
*
* A flashing icon to provide visual feedback for the user when something
* not very important happens in the system.
* The icon is flashed for a few seconds and then remains visible for a while longer.
*
* @author saubrecht
*/
abstract class FlashingIcon extends JComponent implements MouseListener {
protected int STOP_FLASHING_DELAY = 10 * 1000;
protected int DISAPPEAR_DELAY_MILLIS = STOP_FLASHING_DELAY + 50 * 1000;
protected int FLASHING_FREQUENCY = 500;
private Icon icon;
private boolean keepRunning = false;
private boolean isIconVisible = false;
private boolean keepFlashing = true;
private long startTime = 0;
private Task timerTask;
/**
* Creates a new instance of FlashingIcon
*
* @param icon The icon that will be flashing (blinking)
*/
protected FlashingIcon( Icon icon ) {
this.icon = icon;
Dimension d = new Dimension( icon.getIconWidth(), icon.getIconHeight() );
setMinimumSize( d );
setMaximumSize( d );
setPreferredSize( d );
setVisible (false);
addMouseListener( this );
}
/**
* Start flashing of the icon. If the icon is already flashing, the timer
* is reset.
* If the icon is visible but not flashing, it starts flashing again
* and the disappear timer is reset.
*/
public void startFlashing() {
synchronized( this ) {
startTime = System.currentTimeMillis();
isIconVisible = !isIconVisible;
keepRunning = true;
keepFlashing = true;
if( null == timerTask ) {
timerTask = RequestProcessor.getDefault ().post (new Timer ());
} else {
timerTask.run ();
}
this.setVisible (true);
}
repaint();
}
/**
* Stop the flashing and hide the icon.
*/
public void disappear() {
synchronized( this ) {
keepRunning = false;
isIconVisible = false;
keepFlashing = false;
if( null != timerTask )
timerTask.cancel();
timerTask = null;
setToolTipText( null );
this.setVisible (false);
}
repaint();
}
/**
* Stop flashing of the icon. The icon remains visible and active (listens
* for mouse clicks and displays tooltip) until the disappear timer expires.
*/
public void stopFlashing() {
synchronized( this ) {
if( keepRunning && !isIconVisible ) {
isIconVisible = true;
repaint();
}
}
keepFlashing = false;
}
/**
* Switch the current image and repaint
*/
protected void flashIcon() {
isIconVisible = !isIconVisible;
repaint();
}
@Override
public void paint(java.awt.Graphics g) {
if( isIconVisible ) {
icon.paintIcon( this, g, 0, 0 );
}
}
public void mouseReleased(MouseEvent e) {}
public void mousePressed(MouseEvent e) {
stopFlashing();
}
public void mouseExited(MouseEvent e) {
stopFlashing();
}
public void mouseEntered(MouseEvent e) {
stopFlashing();
}
public void mouseClicked(MouseEvent e) {
if( isIconVisible ) {
//disappear();
onMouseClick();
}
}
/**
* Invoked when the user clicks the icon.
*/
protected abstract void onMouseClick();
/**
* Invoked when the disappear timer expired.
*/
protected abstract void timeout();
@Override
public Cursor getCursor() {
if( isIconVisible ) {
return Cursor.getPredefinedCursor( Cursor.HAND_CURSOR );
}
return Cursor.getDefaultCursor();
}
@Override
public Point getToolTipLocation( MouseEvent event ) {
JToolTip tip = createToolTip();
tip.setTipText( getToolTipText() );
Dimension d = tip.getPreferredSize();
Point retValue = new Point( getWidth()-d.width, -d.height );
return retValue;
}
private class Timer implements Runnable {
public void run() {
synchronized( FlashingIcon.this ) {
long currentTime = System.currentTimeMillis();
if( keepFlashing ) {
if( currentTime - startTime < STOP_FLASHING_DELAY ) {
flashIcon();
} else {
stopFlashing();
if (DISAPPEAR_DELAY_MILLIS == -1) {
timerTask = null;
}
}
}
if( DISAPPEAR_DELAY_MILLIS > 0 && currentTime - startTime >= DISAPPEAR_DELAY_MILLIS ) {
disappear();
timeout();
} else {
if( null != timerTask )
timerTask.schedule( FLASHING_FREQUENCY );
}
}
}
}
}