source: trunk/src/org/apollo/gui/OverdubbedFrameTimeAxis.java@ 1059

package org.apollo.gui;

import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Rectangle;
import java.awt.Stroke;
import java.awt.event.ComponentEvent;
import java.awt.event.ComponentListener;

import javax.swing.SwingUtilities;

import org.apollo.audio.util.Timeline;
import org.apollo.mvc.Observer;
import org.apollo.mvc.Subject;
import org.apollo.mvc.SubjectChangedEvent;
import org.expeditee.gui.Browser;
import org.expeditee.gui.DisplayIO;
import org.expeditee.gui.FrameGraphics;
import org.expeditee.gui.MessageBay;

/**
 * The global timeline on the current overdubbed frame
 * 
 * @author Brook Novak
 * 
 */
public class OverdubbedFrameTimeAxis implements Observer { //, DisplayIOObserver {

        private TimeAxis timeAxis = null;
        private Rectangle lastInvalidated;
        private Timeline lastTimeline = null;

        private static OverdubbedFrameTimeAxis instance = new OverdubbedFrameTimeAxis();

        private static final int GLOBAL_TIMELINE_HEIGHT = 30;
        private static final Color GLOBAL_TIMELINE_BACKCOLOR = new Color(220, 220, 220, 100);
        private static final Color GLOBAL_EMPTY_TIMELINE_BACKCOLOR = new Color(240, 240, 240, 100);
        
        public static final Stroke TRACK_TIMELINE_STROKE = new BasicStroke(
                        1.0f, BasicStroke.CAP_SQUARE, BasicStroke.JOIN_BEVEL, 0.0f, new float[] { 5.0f, 5.0f }, 0.0f);
        
        private static final Stroke TIMELINE_BORDER_STROKE = new BasicStroke(1.0f);
                        
        /**
         * Singleton constructor,
         */
        private OverdubbedFrameTimeAxis() {
                
                FrameLayoutDaemon.getInstance().addObserver(this);
                
                //DisplayIO.addDisplayIOObserver(this);
                
                // Listen for resize events
                SwingUtilities.invokeLater(new Runnable() {
                        public void run() {

                                // Keep expanded view centered to the browser window
                                if (Browser._theBrowser != null) {
                                        Browser._theBrowser.addComponentListener(new ComponentListener() {

                                                public void componentHidden(ComponentEvent e) {
                                                }

                                                public void componentMoved(ComponentEvent e) {
                                                }

                                                public void componentResized(ComponentEvent e) {
                                                        updateAxis();
                                                }

                                                public void componentShown(ComponentEvent e) {
                                                }
                                                
                                        });
                                }
                                
                        }
                });
        }


        /**
         * 
         * @return
         *              The singleton instance.
         */
        public static OverdubbedFrameTimeAxis getInstance() {
                return instance;
        }
        
        public void setObservedSubject(Subject parent) {
        }

        public Subject getObservedSubject() {
                return FrameLayoutDaemon.getInstance();
        }

        public void modelChanged(Subject source, SubjectChangedEvent event) {
                updateAxis();
        }
        
        /*public void frameChanged() {
                updateAxis();
        }*/
        
        private void updateAxis() {
                
                if (Browser._theBrowser == null)
                        return;

                lastTimeline = FrameLayoutDaemon.getInstance().getLastComputedTimeline();
                if (lastTimeline == null || 
                        FrameLayoutDaemon.getInstance().getTimelineOwner() != DisplayIO.getCurrentFrame()) {
                        
                        // The frame layout daemon only lays out frames once - unless the user rearranges tracks
                        // on a frame then the daemon we re-calc the timeline... thus a timeline must be infferred
                        
                        lastTimeline = FrameLayoutDaemon.inferTimeline(DisplayIO.getCurrentFrame());
                        
                        if (lastTimeline == null) { // no widgets
                                if (timeAxis != null && lastInvalidated != null) {
                                        FrameGraphics.invalidateArea(lastInvalidated); // old position
                                }
                                
                                timeAxis = null;
                                return;
                        }
                        
                }
                
                timeAxis = new TimeAxis();

                timeAxis.setAxis(
                                0, 
                                lastTimeline.getRunningTime(), 
                                -1,
                                lastTimeline.getRunningTime(), 
                                lastTimeline.getPixelWidth());

                
                Rectangle newBounds = getCurrentTimelineArea();
                if (lastInvalidated != null && !lastInvalidated.equals(newBounds)) {
                        FrameGraphics.invalidateArea(lastInvalidated); // old position
                }
                
                FrameGraphics.invalidateArea(newBounds);
                
                lastInvalidated = newBounds;
                
                FrameGraphics.refresh(true);
                
        }

        public Rectangle getCurrentTimelineArea() {
                assert(Browser._theBrowser != null);
                int y = Browser._theBrowser.getContentPane().getHeight() - GLOBAL_TIMELINE_HEIGHT;
                if (!FrameGraphics.isAudienceMode()) {
                        y -= MessageBay.MESSAGE_BUFFER_HEIGHT;
                }
                
                if (y < 0) y = 0;

                return new Rectangle(0, y, Browser._theBrowser.getContentPane().getWidth(), GLOBAL_TIMELINE_HEIGHT);
        }
        

        public void paint(Graphics g) {
                if (Browser._theBrowser == null) return;

                if (timeAxis != null && lastTimeline != null) {
                
                        Rectangle r = getCurrentTimelineArea();

                        g.setColor(GLOBAL_EMPTY_TIMELINE_BACKCOLOR);
                        g.fillRect(0, r.y, Browser._theBrowser.getContentPane().getWidth(), r.height);
                        
                        timeAxis.paint(g, 
                                        lastTimeline.getInitiationXPixel(),
                                        r.y,
                                        r.height, 
                                        GLOBAL_TIMELINE_BACKCOLOR);
                        
                        
                        g.setColor(Color.DARK_GRAY);
                        
                        ((Graphics2D)g).setStroke(TIMELINE_BORDER_STROKE);
                        g.drawLine(0, r.y, Browser._theBrowser.getContentPane().getWidth(), r.y);
        
                }
                
                
        }


        public Timeline getLastTimeline() {
                return lastTimeline;
        }


        public TimeAxis getTimeAxis() {
                return timeAxis;
        }
        
        
        
}