7113349: Initial changeset for Macosx port to jdk
Reviewed-by: jjh, alanb, dholmes, anthony, ohrstrom, ksrini, jrose, weijun, smarks
Contributed-by: Alan Bateman <alan.bateman@oracle.com>, Alexander Potochkin <alexander.potochkin@oracle.com>, Alexander Zuev <alexander.zuev@oracle.com>, Andrew Brygin <andrew.brygin@oracle.com>, Artem Ananiev <artem.ananiev@oracle.com>, Alex Strange <astrange@apple.com>, Bino George <bino@apple.com>, Christine Lu <christine.lu@oracle.com>, David Katleman <david.katleman@oracle.com>, David Durrence <david_durrence@apple.com>, Dmitry Cherepanov <dmitry.cherepanov@oracle.com>, Greg Lewis <glewis@eyesbeyond.com>, Kevin Miller <kevin_m_miller@apple.com>, Kurt Miller <kurt@intricatesoftware.com>, Landon Fuller <landonf@plausiblelabs.com>, Leonid Romanov <leonid.romanov@oracle.com>, Loefty Walkowiak <loefty@apple.com>, Mark Reinhold <mark.reinhold@oracle.com>, Naoto Sato <naoto.sato@oracle.com>, Philip Race <philip.race@oracle.com>, Roger Hoover <rhoover@apple.com>, Scott Kovatch <scott.kovatch@oracle.com>, Sergey ByloKhov <sergey.bylokhov@oracle.com>, Mike Swingler <swingler@apple.com>, Tomas Hurka <tomas.hurka@oracle.com>
/*
* Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package sun.lwawt;
import java.awt.Component;
import java.awt.Container;
import java.awt.Cursor;
import java.awt.Point;
import java.util.concurrent.atomic.AtomicBoolean;
import sun.awt.SunToolkit;
public abstract class LWCursorManager {
// A flag to indicate if the update is scheduled, so we don't
// process it twice
private AtomicBoolean updatePending = new AtomicBoolean(false);
protected LWCursorManager() {
}
/*
* Sets the cursor to correspond the component currently under mouse.
*
* This method should not be executed on the toolkit thread as it
* calls to user code (e.g. Container.findComponentAt).
*/
public void updateCursor() {
updatePending.set(false);
updateCursorImpl();
}
/*
* Schedules updating the cursor on the corresponding event dispatch
* thread for the given window.
*
* This method is called on the toolkit thread as a result of a
* native update cursor request (e.g. WM_SETCURSOR on Windows).
*/
public void updateCursorLater(LWWindowPeer window) {
if (updatePending.compareAndSet(false, true)) {
Runnable r = new Runnable() {
@Override
public void run() {
updateCursor();
}
};
SunToolkit.executeOnEventHandlerThread(window.getTarget(), r);
}
}
private void updateCursorImpl() {
LWWindowPeer windowUnderCursor = LWWindowPeer.getWindowUnderCursor();
Point cursorPos = getCursorPosition();
LWComponentPeer<?, ?> componentUnderCursor = null;
// TODO: it's possible to get the component under cursor directly as
// it's stored in LWWindowPee anyway (lastMouseEventPeer)
if (windowUnderCursor != null) {
componentUnderCursor = windowUnderCursor.findPeerAt(cursorPos.x, cursorPos.y);
}
Cursor cursor = null;
if (componentUnderCursor != null) {
Component c = componentUnderCursor.getTarget();
if (c instanceof Container) {
Point p = componentUnderCursor.getLocationOnScreen();
c = ((Container)c).findComponentAt(cursorPos.x - p.x, cursorPos.y - p.y);
}
// Traverse up to the first visible, enabled and showing component
while (c != null) {
if (c.isVisible() && c.isEnabled() && (c.getPeer() != null)) {
break;
}
c = c.getParent();
}
if (c != null) {
cursor = c.getCursor();
}
}
// TODO: default cursor for modal blocked windows
setCursor(windowUnderCursor, cursor);
}
/*
* Returns the current cursor position.
*/
// TODO: make it public to reuse for MouseInfo
protected abstract Point getCursorPosition();
/*
* Sets a cursor. The cursor can be null if the mouse is not over a Java window.
*/
protected abstract void setCursor(LWWindowPeer windowUnderCursor, Cursor cursor);
}