/**
* Paints a line at the current location of the divider.
*
* @param g the Graphics used to paint
*/
public void paint(Graphics g) {
if (station.isResizingEnabled() && !station.isDisabled()) {
if (current != null && pressed) {
station.getPaint().drawDivider(g, bounds);
}
}
}
public void install(Component container) {
if (this.container != null) {
throw new IllegalStateException("already initialized");
}
this.container = container;
container.addMouseListener(this);
container.addMouseMotionListener(this);
station.addDockHierarchyListener(this);
setController(station.getController());
}
public void mouseDragged(MouseEvent e) {
if (station.isResizingEnabled() && !station.isDisabled()) {
if (pressed && current != null) {
divider = current.getDividerAt(e.getX() + deltaX, e.getY() + deltaY);
divider = current.validateDivider(divider);
repaint(bounds.x, bounds.y, bounds.width, bounds.height);
bounds = current.getDividerBounds(divider, bounds);
repaint(bounds.x, bounds.y, bounds.width, bounds.height);
if (station.isContinousDisplay() && current != null) {
setDivider(current, divider);
station.updateBounds();
}
}
}
}
@Override
public void mousePressed(MouseEvent e) {
if (station.isResizingEnabled() && !station.isDisabled()) {
if (!pressed) {
pressed = true;
mouseMoved(e);
if (current != null) {
divider = current.getDividerAt(e.getX() + deltaX, e.getY() + deltaY);
divider = current.validateDivider(divider);
repaint(bounds.x, bounds.y, bounds.width, bounds.height);
bounds = current.getDividerBounds(divider, bounds);
repaint(bounds.x, bounds.y, bounds.width, bounds.height);
}
}
}
}
/**
* Asynchronously checks the current position of the mouse and updates the cursor if necessary.
*/
protected void checkMousePositionAsync() {
DockController controller = station.getController();
if (controller != null && !awtListenerEnabled) {
SwingUtilities.invokeLater(
new Runnable() {
public void run() {
if (container != null) {
PointerInfo p = MouseInfo.getPointerInfo();
Point e = p.getLocation();
SwingUtilities.convertPointFromScreen(e, container);
current = getDividerNode(e.x, e.y);
if (current == null) {
mouseExited(null);
} else {
// check bounds with one pixel delta -> divider needs to be greater than 2
// pixels, because divider bounds will be shrinked by 1 pixel at each side
if (bounds.width > 2 && bounds.height > 2) {
if (e.x <= bounds.x
|| e.x >= bounds.x + bounds.width - 1
|| e.y <= bounds.y
|| e.y >= bounds.y + bounds.height - 1) {
// mouse is likely to be not on divider anymore
mouseExited(null);
}
}
}
}
}
});
}
}
public void mouseMoved(MouseEvent e) {
if (station.isResizingEnabled()) {
current = station.getRoot().getDividerNode(e.getX(), e.getY());
if (current == null) setCursor(null);
else if (current.getOrientation() == Orientation.HORIZONTAL)
setCursor(Cursor.getPredefinedCursor(Cursor.W_RESIZE_CURSOR));
else setCursor(Cursor.getPredefinedCursor(Cursor.N_RESIZE_CURSOR));
if (current != null) {
bounds = current.getDividerBounds(current.getDivider(), bounds);
deltaX = bounds.width / 2 + bounds.x - e.getX();
deltaY = bounds.height / 2 + bounds.y - e.getY();
}
}
}
@Override
public void mouseExited(MouseEvent e) {
if (station.isResizingEnabled()) {
if (!pressed) {
current = null;
setCursor(null);
}
}
}
public void mouseMoved(MouseEvent e) {
if (station.isResizingEnabled() && !station.isDisabled()) {
current = getDividerNode(e.getX(), e.getY());
if (current == null) setCursor(null);
else if (current.getOrientation() == Orientation.HORIZONTAL)
setCursor(Cursor.getPredefinedCursor(Cursor.W_RESIZE_CURSOR));
else setCursor(Cursor.getPredefinedCursor(Cursor.N_RESIZE_CURSOR));
if (current != null) {
bounds = current.getDividerBounds(current.getActualDivider(), bounds);
deltaX = bounds.width / 2 + bounds.x - e.getX();
deltaY = bounds.height / 2 + bounds.y - e.getY();
// mouse is over divider
withinBounds = true;
} else {
// mouse is not over divider anymore
withinBounds = false;
}
}
}
@Override
public void mouseReleased(MouseEvent e) {
if (pressed) {
pressed = false;
if (current != null) {
current.setDivider(divider);
repaint(bounds.x, bounds.y, bounds.width, bounds.height);
station.updateBounds();
}
setCursor(null);
mouseMoved(e);
checkMousePositionAsync();
}
}
/** Disposes all resources that are used by this handler. */
public void destroy() {
if (container != null) {
setCursor(null);
current = null;
container.removeMouseListener(this);
container.removeMouseMotionListener(this);
container = null;
try {
java.awt.Toolkit.getDefaultToolkit().removeAWTEventListener(this);
} catch (Throwable e) {
e.printStackTrace();
}
setController(null);
station.removeDockHierarchyListener(this);
}
}
/**
* Asynchronously checks the current position of the mouse and updates the cursor if necessary.
*/
protected void checkMousePositionAsync() {
DockController controller = station.getController();
if (controller != null && !controller.isRestrictedEnvironment()) {
SwingUtilities.invokeLater(
new Runnable() {
public void run() {
if (container != null) {
PointerInfo p = MouseInfo.getPointerInfo();
Point e = p.getLocation();
SwingUtilities.convertPointFromScreen(e, container);
current = station.getRoot().getDividerNode(e.x, e.y);
if (current == null) {
setCursor(null);
}
}
}
});
}
}
@Override
public void mouseReleased(MouseEvent e) {
if (pressed) {
pressed = false;
if (current != null) {
setDivider(current, divider);
repaint(bounds.x, bounds.y, bounds.width, bounds.height);
station.updateBounds();
}
setCursor(null);
mouseMoved(e);
if (controller != null && !controller.isRestrictedEnvironment() && awtListenerEnabled) {
// new solution
eventDispatched(e);
} else {
// old solution with a little tweaking
checkMousePositionAsync();
}
}
}
/**
* AWT event listener. Used to reset the mouse cursor when divider was changed and mouse exited
* event had not occurred normally.
*
* @param event
*/
public void eventDispatched(AWTEvent event) {
if (event.getID() == MouseEvent.MOUSE_MOVED || event.getID() == MouseEvent.MOUSE_RELEASED) {
MouseEvent mev = (MouseEvent) event;
if (mev.getSource() != Handler.this.container && withinBounds) {
if (mev.getSource() instanceof GlassedPane.GlassPane) {
// on glass pane -> check with traditional method
// Question by Beni: does this ever happen?
checkMousePositionAsync();
} else {
// mouse is over another component which is not the registered container and the mouse
// cursor had not been reseted yet -> reset mouse cursor
Point p = SwingUtilities.convertPoint(mev.getComponent(), mev.getPoint(), station);
if (station.getBounds().contains(p)) {
// only if mouse is within our station
setCursor(null);
withinBounds = false;
}
}
}
}
}
/**
* Gets the node whose dividier contains <code>x, y</code>.
*
* @param x the x coordinate
* @param y the y coordinate
* @return the node containing <code>x, y</code>
*/
protected Divideable getDividerNode(int x, int y) {
return station.getRoot().getDividerNode(x, y);
}
public void controllerChanged(DockHierarchyEvent event) {
setController(station.getController());
}