public synchronized void paintIcon(Component c, Graphics g, int x, int y) {
g.setColor(Color.white);
g.fillRect(0, 0, c.getWidth(), c.getHeight());
if (getImageObserver() == null) {
g.drawImage(
getImage(),
c.getWidth() / 2 - getIconWidth() / 2,
c.getHeight() / 2 - getIconHeight() / 2,
c);
} else {
g.drawImage(
getImage(),
c.getWidth() / 2 - getIconWidth() / 2,
c.getHeight() / 2 - getIconHeight() / 2,
getImageObserver());
}
}
/**
* Returns the component in the currently selected path which contains sourcePoint.
*
* @param source The component in whose coordinate space sourcePoint is given
* @param sourcePoint The point which is being tested
* @return The component in the currently selected path which contains sourcePoint (relative to
* the source component's coordinate space. If sourcePoint is not inside a component on the
* currently selected path, null is returned.
*/
public Component componentForPoint(Component source, Point sourcePoint) {
int screenX, screenY;
Point p = sourcePoint;
int i, c, j, d;
Component mc;
Rectangle r2;
int cWidth, cHeight;
MenuElement menuElement;
MenuElement subElements[];
Vector<MenuElement> tmp;
int selectionSize;
SwingUtilities.convertPointToScreen(p, source);
screenX = p.x;
screenY = p.y;
tmp = (Vector<MenuElement>) selection.clone();
selectionSize = tmp.size();
for (i = selectionSize - 1; i >= 0; i--) {
menuElement = (MenuElement) tmp.elementAt(i);
subElements = menuElement.getSubElements();
for (j = 0, d = subElements.length; j < d; j++) {
if (subElements[j] == null) continue;
mc = subElements[j].getComponent();
if (!mc.isShowing()) continue;
if (mc instanceof JComponent) {
cWidth = mc.getWidth();
cHeight = mc.getHeight();
} else {
r2 = mc.getBounds();
cWidth = r2.width;
cHeight = r2.height;
}
p.x = screenX;
p.y = screenY;
SwingUtilities.convertPointFromScreen(p, mc);
/**
* Return the deepest component on the selection path in whose bounds the event's point
* occurs
*/
if (p.x >= 0 && p.x < cWidth && p.y >= 0 && p.y < cHeight) {
return mc;
}
}
}
return null;
}
/**
* When a MenuElement receives an event from a MouseListener, it should never process the event
* directly. Instead all MenuElements should call this method with the event.
*
* @param event a MouseEvent object
*/
public void processMouseEvent(MouseEvent event) {
int screenX, screenY;
Point p;
int i, c, j, d;
Component mc;
Rectangle r2;
int cWidth, cHeight;
MenuElement menuElement;
MenuElement subElements[];
MenuElement path[];
Vector<MenuElement> tmp;
int selectionSize;
p = event.getPoint();
Component source = event.getComponent();
if ((source != null) && !source.isShowing()) {
// This can happen if a mouseReleased removes the
// containing component -- bug 4146684
return;
}
int type = event.getID();
int modifiers = event.getModifiers();
// 4188027: drag enter/exit added in JDK 1.1.7A, JDK1.2
if ((type == MouseEvent.MOUSE_ENTERED || type == MouseEvent.MOUSE_EXITED)
&& ((modifiers
& (InputEvent.BUTTON1_MASK | InputEvent.BUTTON2_MASK | InputEvent.BUTTON3_MASK))
!= 0)) {
return;
}
if (source != null) {
SwingUtilities.convertPointToScreen(p, source);
}
screenX = p.x;
screenY = p.y;
tmp = (Vector<MenuElement>) selection.clone();
selectionSize = tmp.size();
boolean success = false;
for (i = selectionSize - 1; i >= 0 && success == false; i--) {
menuElement = (MenuElement) tmp.elementAt(i);
subElements = menuElement.getSubElements();
path = null;
for (j = 0, d = subElements.length; j < d && success == false; j++) {
if (subElements[j] == null) continue;
mc = subElements[j].getComponent();
if (!mc.isShowing()) continue;
if (mc instanceof JComponent) {
cWidth = mc.getWidth();
cHeight = mc.getHeight();
} else {
r2 = mc.getBounds();
cWidth = r2.width;
cHeight = r2.height;
}
p.x = screenX;
p.y = screenY;
SwingUtilities.convertPointFromScreen(p, mc);
/**
* Send the event to visible menu element if menu element currently in the selected path or
* contains the event location
*/
if ((p.x >= 0 && p.x < cWidth && p.y >= 0 && p.y < cHeight)) {
int k;
if (path == null) {
path = new MenuElement[i + 2];
for (k = 0; k <= i; k++) path[k] = (MenuElement) tmp.elementAt(k);
}
path[i + 1] = subElements[j];
MenuElement currentSelection[] = getSelectedPath();
// Enter/exit detection -- needs tuning...
if (currentSelection[currentSelection.length - 1] != path[i + 1]
&& (currentSelection.length < 2
|| currentSelection[currentSelection.length - 2] != path[i + 1])) {
Component oldMC = currentSelection[currentSelection.length - 1].getComponent();
MouseEvent exitEvent =
new MouseEvent(
oldMC,
MouseEvent.MOUSE_EXITED,
event.getWhen(),
event.getModifiers(),
p.x,
p.y,
event.getXOnScreen(),
event.getYOnScreen(),
event.getClickCount(),
event.isPopupTrigger(),
MouseEvent.NOBUTTON);
currentSelection[currentSelection.length - 1].processMouseEvent(exitEvent, path, this);
MouseEvent enterEvent =
new MouseEvent(
mc,
MouseEvent.MOUSE_ENTERED,
event.getWhen(),
event.getModifiers(),
p.x,
p.y,
event.getXOnScreen(),
event.getYOnScreen(),
event.getClickCount(),
event.isPopupTrigger(),
MouseEvent.NOBUTTON);
subElements[j].processMouseEvent(enterEvent, path, this);
}
MouseEvent mouseEvent =
new MouseEvent(
mc,
event.getID(),
event.getWhen(),
event.getModifiers(),
p.x,
p.y,
event.getXOnScreen(),
event.getYOnScreen(),
event.getClickCount(),
event.isPopupTrigger(),
MouseEvent.NOBUTTON);
subElements[j].processMouseEvent(mouseEvent, path, this);
success = true;
event.consume();
}
}
}
}