package ij.plugin;
import ij.*;
import ij.gui.*;

/** This plugin implements the Plugins/Utilities/Monitor Events command.
    By implementing the IJEventListener, CommandListener, ImageListener
    and RoiListener interfaces, it is able to monitor foreground and background
    color changes, tool switches, Log window closings, command executions, image
    window openings, closings and updates, and ROI changes.
*/
public class EventListener implements PlugIn, IJEventListener, ImageListener, RoiListener, CommandListener {

    public void run(String arg) {
        IJ.addEventListener(this);
        Executer.addCommandListener(this);
        ImagePlus.addImageListener(this);
        Roi.addRoiListener(this);
        IJ.log("EventListener started");
    }
    
    public void eventOccurred(int eventID) {
        switch (eventID) {
            case IJEventListener.FOREGROUND_COLOR_CHANGED:
                String c = Integer.toHexString(Toolbar.getForegroundColor().getRGB());
                c = "#"+c.substring(2);
                IJ.log("Changed foreground color to "+c);
                break;
            case IJEventListener.BACKGROUND_COLOR_CHANGED:
                c = Integer.toHexString(Toolbar.getBackgroundColor().getRGB());
                c = "#"+c.substring(2);
                IJ.log("Changed background color to "+c);
                break;
            case IJEventListener.TOOL_CHANGED:
                String name = IJ.getToolName();
                IJ.log("Switched to the "+name+(name.endsWith("Tool")?"":" tool"));
                break;
            case IJEventListener.COLOR_PICKER_CLOSED:
                IJ.log("Color picker closed");
                break;
            case IJEventListener.LOG_WINDOW_CLOSED:
                IJ.removeEventListener(this);
                Executer.removeCommandListener(this);
                ImagePlus.removeImageListener(this);
                Roi.removeRoiListener(this);
                IJ.showStatus("Log window closed; EventListener stopped");
                break;
        }
    }

    // called when an image is opened
    public void imageOpened(ImagePlus imp) {
        IJ.log("Opened \""+imp.getTitle()+"\"");
    }

    // Called when an image is closed
    public void imageClosed(ImagePlus imp) {
        IJ.log("Closed \""+imp.getTitle()+"\"");
    }

    // Called when an image's pixel data is updated
    public void imageUpdated(ImagePlus imp) {
        IJ.log("Updated \""+imp.getTitle()+"\"");
    }
    
    public String commandExecuting(String command) {
        IJ.log("Executed \""+command+"\" command");
        return command;
    }
    
    public  void roiModified(ImagePlus img, int id) {
        String type = "UNKNOWN";
        switch (id) {
            case CREATED: type="CREATED"; break;
            case MOVED: type="MOVED"; break;
            case MODIFIED: type="MODIFIED"; break;
            case EXTENDED: type="EXTENDED"; break;
            case COMPLETED: type="COMPLETED"; break;
            case DELETED: type="DELETED"; break;
        }
        IJ.log("ROI Modified: "+(img!=null?img.getTitle():"")+", "+type);
    }


}