88 lines
1.8 KiB
Java
88 lines
1.8 KiB
Java
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/*
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Copyright 2006 Rene Grothmann, modified by Eric Hakenholz
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This file is part of C.a.R. software.
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C.a.R. is a free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, version 3 of the License.
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C.a.R. is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package rene.zirkel;
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import java.awt.event.MouseEvent;
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/**
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* @author Rene A thread for reporting drags to the main program, avoiding to
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* many drag messages, so that the program seems to hang.
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*/
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class DragThread extends Thread {
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MouseEvent EWaiting = null;
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ZirkelCanvas ZC;
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Object Ready = new Object();
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boolean Working = false;
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public DragThread(final ZirkelCanvas zc) {
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ZC = zc;
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start();
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}
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@Override
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public void run() {
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MouseEvent e;
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while (true) {
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if (EWaiting == null) {
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try {
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synchronized (this) {
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wait();
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}
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} catch (final Exception ex) {
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}
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}
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if (EWaiting != null) {
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synchronized (this) {
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e = EWaiting;
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EWaiting = null;
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}
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Working = true;
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ZC.doMouseDragged(e);
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try {
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sleep(0);
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} catch (final Exception ex) {
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}
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Working = false;
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synchronized (Ready) {
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Ready.notify();
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}
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}
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}
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}
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public synchronized void mouseDragged(final MouseEvent e) {
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EWaiting = e;
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notify();
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}
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public void waitReady() {
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if (!Working)
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return;
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synchronized (Ready) {
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try {
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Thread.currentThread().wait(1000);
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} catch (final Exception ex) {
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}
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}
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}
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}
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