OnChangeExample.java

//   Copyright 2011 Palantir Technologies
//
//   Licensed 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 com.palantir.ptoss.cinch.example.simple;

import java.awt.EventQueue;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JToggleButton;
import javax.swing.SwingConstants;
import javax.swing.UIManager;
import javax.swing.event.ChangeEvent;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.palantir.ptoss.cinch.core.Bindings;
import com.palantir.ptoss.cinch.core.DefaultBindableModel;
import com.palantir.ptoss.cinch.example.Examples;
import com.palantir.ptoss.cinch.swing.Bound;
import com.palantir.ptoss.cinch.swing.OnChange;


/**
 * Simple example illustrating use of {@link OnChange}.  Fires a method call on an Change event.
 * Note that for a component like {@link JToggleButton}, this includes every mouse event, such that
 * a toggle will generate six {@link ChangeEvent}s.
 *
 * @see <a href='http://docs.oracle.com/javase/6/docs/api/javax/swing/event/ChangeListener.html'>ChangeListener</a> - contains a list of components that support ChangeListeners.
 */
public class OnChangeExample {

    static final Logger log = LoggerFactory.getLogger(OnChangeExample.class);

    public final Model model = new Model();
    public final JLabel label = new JLabel("Toggle: ");
    @Bound(to = "toggle")
    @OnChange(call = "incrementStateChangeCount")
    public final JToggleButton button = new JToggleButton("Click Me!");
    public final JLabel countLabel = new JLabel("Button State Changes: ");
    @Bound(to = "stateChangeCount")
    public final JLabel count = new JLabel("0");

    final Bindings bindings = new Bindings();

    public OnChangeExample() {
        this.bindings.bind(this);
        this.buildGUI();
    }

    public static class Model extends DefaultBindableModel {

        boolean toggle;
        Integer stateChangeCount = new Integer(0);

        public boolean isToggle() {
            return toggle;
        }

        public void setToggle(boolean toggle) {
            this.toggle = toggle;
        }

        public Integer getStateChangeCount() {
            return stateChangeCount;
        }

        public synchronized void setStateChangeCount(Integer inverseVal) {
            this.stateChangeCount = inverseVal;
            update();
        }

        public synchronized void incrementStateChangeCount() {
            int incrementedCount = stateChangeCount + 1;
            log.info("New toggle count: " + incrementedCount);
            setStateChangeCount(incrementedCount);
        }
    }



    void buildGUI() {
        JFrame frame = new JFrame(OnChangeExample.class.getSimpleName());
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(400, 100);
        frame.setLayout(new GridBagLayout());




        frame.add(label,getLeftGBC(0));
        frame.add(button,getRightGBC(0));
        count.setHorizontalAlignment(SwingConstants.CENTER);
        frame.add(countLabel,getLeftGBC(1));
        frame.add(count,getRightGBC(1));
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        Examples.initializeLogging();
        // set to Metal LaF
        try {
            UIManager.setLookAndFeel(UIManager.getCrossPlatformLookAndFeelClassName());
            EventQueue.invokeAndWait(new Runnable() {
                public void run() {
                    new OnChangeExample();
                }
            });
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    GridBagConstraints getDefaultGBC() {
        GridBagConstraints gbc = new GridBagConstraints();
        gbc.gridheight = 1;
        gbc.gridwidth = 1;
        gbc.gridy = 0;
        gbc.gridx = 0;
        gbc.fill = GridBagConstraints.HORIZONTAL;
        gbc.weightx = 1;
        gbc.weighty = 1;
        gbc.ipadx = 5;
        gbc.ipady = 5;
        gbc.insets = new Insets(10, 0, 10, 0);
        return gbc;
    }

    GridBagConstraints getLeftGBC(int gridy) {
        GridBagConstraints gbc = getDefaultGBC();
        gbc.gridx = 0;
        gbc.gridy = gridy;
        gbc.anchor = GridBagConstraints.EAST;
        gbc.weightx = 0;
        return gbc;
    }

    GridBagConstraints getRightGBC(int gridy) {
        GridBagConstraints gbc = getDefaultGBC();
        gbc.gridx = 1;
        gbc.gridy = gridy;
        gbc.anchor = GridBagConstraints.WEST;
        gbc.weightx = 1;
        return gbc;
    }
}