问题
I want to add JPopupMenu to the task bar as a TrayIcon (i.e systemTray.add(trayIcon)) but I haven't found a way to do so.From the docs the constructor of TrayIcon looks like :
public TrayIcon(Image image,
String tooltip,
PopupMenu popup)
Is there any way I can do this ?
回答1:
This is a known problem. There is a bug report, which contains the outline of a workaround. I've adapted that below:
// Build your popup menu
final JPopupMenu trayPopup = new JPopupMenu();
// I'm using actions, there are other ways of doing this.
trayPopup.add(someFantaticAction);
// Get your tray icon
trayIcon = new TrayIcon(icon, "My awesome application");
trayIcon.addMouseListener(new MouseAdapter() {
@Override
public void mouseReleased(MouseEvent e) {
maybeShowPopup(e);
}
@Override
public void mousePressed(MouseEvent e) {
maybeShowPopup(e);
}
private void maybeShowPopup(MouseEvent e) {
if (e.isPopupTrigger()) {
trayPopup.setLocation(e.getX(), e.getY());
trayPopup.setInvoker(trayPopup);
trayPopup.setVisible(true);
}
}
});
回答2:
For the current TrayIcon implementation, it is not possible to directly add a JPopupMenu or JMenu to TrayIcon. However, some people did manage to work around it by implementing a custom MouseListener which listens to right click only at the Trayicon. When the mouse is right-clicked, set location of the Popupmenu at event.getXOnScreen() and event.getYOnScreen() and setvisible it.
回答3:
I can't see any issues with constructor public TrayIcon(Image image, String tooltip, PopupMenu popup), nor is Java7 on WinXp / Win7 (Win2003/2008)
import java.awt.Color;
import java.awt.Component;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GraphicsConfiguration;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import java.awt.Image;
import java.awt.MenuItem;
import java.awt.PopupMenu;
import java.awt.SystemTray;
import java.awt.TrayIcon;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.image.BufferedImage;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.UIManager;
public class ActiveTray {
public static void main(String args[]) throws Exception {
if (SystemTray.isSupported() == false) {
System.err.println("No system tray available");
return;
}
final SystemTray tray = SystemTray.getSystemTray();
PropertyChangeListener propListener = new PropertyChangeListener() {
public void propertyChange(PropertyChangeEvent evt) {
TrayIcon oldTray[] = (TrayIcon[]) evt.getOldValue();
TrayIcon newTray[] = (TrayIcon[]) evt.getNewValue();
System.out.println(oldTray.length + " / " + newTray.length);
}
};
tray.addPropertyChangeListener("trayIcons", propListener);
Icon icon = new BevelArrowIcon(BevelArrowIcon.UP, false, false);
Image image = iconToImage(icon);
PopupMenu popup = new PopupMenu();
MenuItem item = new MenuItem("Hello, World");
final TrayIcon trayIcon = new TrayIcon(image, "Tip Text", popup);
ActionListener menuActionListener = new ActionListener() {
public void actionPerformed(ActionEvent e) {
trayIcon.displayMessage("Good-bye", "Cruel World",
TrayIcon.MessageType.WARNING);
}
};
item.addActionListener(menuActionListener);
popup.add(item);
ActionListener actionListener = new ActionListener() {
public void actionPerformed(ActionEvent e) {
tray.remove(trayIcon);
}
};
trayIcon.addActionListener(actionListener);
tray.add(trayIcon);
}
static Image iconToImage(Icon icon) {
if (icon instanceof ImageIcon) {
return ((ImageIcon) icon).getImage();
} else {
int w = icon.getIconWidth();
int h = icon.getIconHeight();
GraphicsEnvironment ge =
GraphicsEnvironment.getLocalGraphicsEnvironment();
GraphicsDevice gd = ge.getDefaultScreenDevice();
GraphicsConfiguration gc = gd.getDefaultConfiguration();
BufferedImage image = gc.createCompatibleImage(w, h);
Graphics2D g = image.createGraphics();
icon.paintIcon(null, g, 0, 0);
g.dispose();
return image;
}
}
static class BevelArrowIcon implements Icon {
public static final int UP = 0; // direction
public static final int DOWN = 1;
private static final int DEFAULT_SIZE = 16;
private Color edge1;
private Color edge2;
private Color fill;
private int size;
private int direction;
public BevelArrowIcon(int direction, boolean isRaisedView,
boolean isPressedView) {
if (isRaisedView) {
if (isPressedView) {
init(UIManager.getColor("controlLtHighlight"),
UIManager.getColor("controlDkShadow"),
UIManager.getColor("controlShadow"),
DEFAULT_SIZE, direction);
} else {
init(UIManager.getColor("controlHighlight"),
UIManager.getColor("controlShadow"),
UIManager.getColor("control"),
DEFAULT_SIZE, direction);
}
} else {
if (isPressedView) {
init(UIManager.getColor("controlDkShadow"),
UIManager.getColor("controlLtHighlight"),
UIManager.getColor("controlShadow"),
DEFAULT_SIZE, direction);
} else {
init(UIManager.getColor("controlShadow"),
UIManager.getColor("controlHighlight"),
UIManager.getColor("control"),
DEFAULT_SIZE, direction);
}
}
}
public BevelArrowIcon(Color edge1, Color edge2, Color fill,
int size, int direction) {
init(edge1, edge2, fill, size, direction);
}
@Override
public void paintIcon(Component c, Graphics g, int x, int y) {
switch (direction) {
case DOWN:
drawDownArrow(g, x, y);
break;
case UP:
drawUpArrow(g, x, y);
break;
}
}
@Override
public int getIconWidth() {
return size;
}
@Override
public int getIconHeight() {
return size;
}
private void init(Color edge1, Color edge2, Color fill,
int size, int direction) {
edge1 = Color.red;
edge2 = Color.blue;
this.edge1 = edge1;
this.edge2 = edge2;
this.fill = fill;
this.size = size;
this.direction = direction;
}
private void drawDownArrow(Graphics g, int xo, int yo) {
g.setColor(edge1);
g.drawLine(xo, yo, xo + size - 1, yo);
g.drawLine(xo, yo + 1, xo + size - 3, yo + 1);
g.setColor(edge2);
g.drawLine(xo + size - 2, yo + 1, xo + size - 1, yo + 1);
int x = xo + 1;
int y = yo + 2;
int dx = size - 6;
while (y + 1 < yo + size) {
g.setColor(edge1);
g.drawLine(x, y, x + 1, y);
g.drawLine(x, y + 1, x + 1, y + 1);
if (0 < dx) {
g.setColor(fill);
g.drawLine(x + 2, y, x + 1 + dx, y);
g.drawLine(x + 2, y + 1, x + 1 + dx, y + 1);
}
g.setColor(edge2);
g.drawLine(x + dx + 2, y, x + dx + 3, y);
g.drawLine(x + dx + 2, y + 1, x + dx + 3, y + 1);
x += 1;
y += 2;
dx -= 2;
}
g.setColor(edge1);
g.drawLine(xo + (size / 2), yo + size - 1, xo
+ (size / 2), yo + size - 1);
}
private void drawUpArrow(Graphics g, int xo, int yo) {
g.setColor(edge1);
int x = xo + (size / 2);
g.drawLine(x, yo, x, yo);
x--;
int y = yo + 1;
int dx = 0;
while (y + 3 < yo + size) {
g.setColor(edge1);
g.drawLine(x, y, x + 1, y);
g.drawLine(x, y + 1, x + 1, y + 1);
if (0 < dx) {
g.setColor(fill);
g.drawLine(x + 2, y, x + 1 + dx, y);
g.drawLine(x + 2, y + 1, x + 1 + dx, y + 1);
}
g.setColor(edge2);
g.drawLine(x + dx + 2, y, x + dx + 3, y);
g.drawLine(x + dx + 2, y + 1, x + dx + 3, y + 1);
x -= 1;
y += 2;
dx += 2;
}
g.setColor(edge1);
g.drawLine(xo, yo + size - 3, xo + 1, yo + size - 3);
g.setColor(edge2);
g.drawLine(xo + 2, yo + size - 2, xo + size - 1, yo + size - 2);
g.drawLine(xo, yo + size - 1, xo + size, yo + size - 1);
}
}
}
回答4:
You can look into Oracle's tutorial and example how to use the system tray
来源：https://stackoverflow.com/questions/12667526/adding-jpopupmenu-to-the-trayicon