/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to you under the Apache License,
* Version 2.0 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package pivot.tutorials.progress;
import pivot.collections.Dictionary;
import pivot.util.concurrent.Task;
import pivot.util.concurrent.TaskExecutionException;
import pivot.util.concurrent.TaskListener;
import pivot.wtk.Application;
import pivot.wtk.ApplicationContext;
import pivot.wtk.Button;
import pivot.wtk.ButtonPressListener;
import pivot.wtk.DesktopApplicationContext;
import pivot.wtk.Display;
import pivot.wtk.Meter;
import pivot.wtk.PushButton;
import pivot.wtk.TaskAdapter;
import pivot.wtk.Window;
import pivot.wtkx.Bindable;
public class Meters extends Bindable implements Application {
public class SampleTask extends Task<Void> {
private int percentage = 0;
public Void execute() throws TaskExecutionException {
// Simulate a long-running operation
percentage = 0;
while (percentage < 100
&& !abort) {
try {
Thread.sleep(100);
percentage++;
// Update the meter on the UI thread
ApplicationContext.queueCallback(new Runnable() {
public void run() {
meter.setPercentage((double)percentage / 100);
}
});
} catch(InterruptedException exception) {
throw new TaskExecutionException(exception);
}
}
return null;
}
}
@Load(resourceName="meters.wtkx") private Window window;
@Bind(fieldName="window") private Meter meter;
@Bind(fieldName="window") private PushButton progressButton;
private SampleTask sampleTask = null;
public void startup(Display display, Dictionary<String, String> properties)
throws Exception {
bind();
progressButton.getButtonPressListeners().add(new ButtonPressListener() {
public void buttonPressed(Button button) {
if (sampleTask == null) {
// Create and start the simulated task; wrap it in a
// task adapter so the result handlers are called on the
// UI thread
sampleTask = new SampleTask();
sampleTask.execute(new TaskAdapter<Void>(new TaskListener<Void>() {
public void taskExecuted(Task<Void> task) {
reset();
}
public void executeFailed(Task<Void> task) {
reset();
}
private void reset() {
// Reset the meter and button
sampleTask = null;
meter.setPercentage(0);
updateProgressButton();
}
}));
} else {
// Cancel the task
sampleTask.abort();
}
updateProgressButton();
}
});
updateProgressButton();
window.open(display);
}
public boolean shutdown(boolean optional) {
if (window != null) {
window.close();
}
return false;
}
public void suspend() {
}
public void resume() {
}
private void updateProgressButton() {
if (sampleTask == null) {
progressButton.setButtonData("Start");
} else {
progressButton.setButtonData("Cancel");
}
}
public static void main(String[] args) {
DesktopApplicationContext.main(Meters.class, args);
}
}