public TaskbarPositionTest() {
super("Use CTRL-down to show a JPopupMenu");
setContentPane(panel = createContentPane());
setJMenuBar(createMenuBar("1 - First Menu", true));
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
// CTRL-down will show the popup.
panel
.getInputMap()
.put(KeyStroke.getKeyStroke(KeyEvent.VK_DOWN, InputEvent.CTRL_MASK), "OPEN_POPUP");
panel.getActionMap().put("OPEN_POPUP", new PopupHandler());
pack();
Toolkit toolkit = Toolkit.getDefaultToolkit();
fullScreenBounds = new Rectangle(new Point(), toolkit.getScreenSize());
screenBounds = new Rectangle(new Point(), toolkit.getScreenSize());
// Place the frame near the bottom. This is a pretty wild guess.
this.setLocation(0, (int) screenBounds.getHeight() - 2 * this.getHeight());
// Reduce the screen bounds by the insets.
GraphicsConfiguration gc = this.getGraphicsConfiguration();
if (gc != null) {
Insets screenInsets = toolkit.getScreenInsets(gc);
screenBounds = gc.getBounds();
screenBounds.width -= (screenInsets.left + screenInsets.right);
screenBounds.height -= (screenInsets.top + screenInsets.bottom);
screenBounds.x += screenInsets.left;
screenBounds.y += screenInsets.top;
}
setVisible(true);
}
/**
* Returns an point which has been adjusted to take into account of the desktop bounds, taskbar
* and multi-monitor configuration.
*
* <p>This adustment may be cancelled by invoking the application with
* -Djavax.swing.adjustPopupLocationToFit=false
*/
Point adjustPopupLocationToFitScreen(int xPosition, int yPosition) {
Point popupLocation = new Point(xPosition, yPosition);
if (popupPostionFixDisabled == true || GraphicsEnvironment.isHeadless()) {
return popupLocation;
}
// Get screen bounds
Rectangle scrBounds;
GraphicsConfiguration gc = getCurrentGraphicsConfiguration(popupLocation);
Toolkit toolkit = Toolkit.getDefaultToolkit();
if (gc != null) {
// If we have GraphicsConfiguration use it to get screen bounds
scrBounds = gc.getBounds();
} else {
// If we don't have GraphicsConfiguration use primary screen
scrBounds = new Rectangle(toolkit.getScreenSize());
}
// Calculate the screen size that popup should fit
Dimension popupSize = JPopupMenu.this.getPreferredSize();
long popupRightX = (long) popupLocation.x + (long) popupSize.width;
long popupBottomY = (long) popupLocation.y + (long) popupSize.height;
int scrWidth = scrBounds.width;
int scrHeight = scrBounds.height;
if (!canPopupOverlapTaskBar()) {
// Insets include the task bar. Take them into account.
Insets scrInsets = toolkit.getScreenInsets(gc);
scrBounds.x += scrInsets.left;
scrBounds.y += scrInsets.top;
scrWidth -= scrInsets.left + scrInsets.right;
scrHeight -= scrInsets.top + scrInsets.bottom;
}
int scrRightX = scrBounds.x + scrWidth;
int scrBottomY = scrBounds.y + scrHeight;
// Ensure that popup menu fits the screen
if (popupRightX > (long) scrRightX) {
popupLocation.x = scrRightX - popupSize.width;
if (popupLocation.x < scrBounds.x) {
popupLocation.x = scrBounds.x;
}
}
if (popupBottomY > (long) scrBottomY) {
popupLocation.y = scrBottomY - popupSize.height;
if (popupLocation.y < scrBounds.y) {
popupLocation.y = scrBounds.y;
}
}
return popupLocation;
}
/**
* Tries to find GraphicsConfiguration that contains the mouse cursor position. Can return null.
*/
private GraphicsConfiguration getCurrentGraphicsConfiguration(Point popupLocation) {
GraphicsConfiguration gc = null;
GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
GraphicsDevice[] gd = ge.getScreenDevices();
for (int i = 0; i < gd.length; i++) {
if (gd[i].getType() == GraphicsDevice.TYPE_RASTER_SCREEN) {
GraphicsConfiguration dgc = gd[i].getDefaultConfiguration();
if (dgc.getBounds().contains(popupLocation)) {
gc = dgc;
break;
}
}
}
// If not found and we have invoker, ask invoker about his gc
if (gc == null && getInvoker() != null) {
gc = getInvoker().getGraphicsConfiguration();
}
return gc;
}