Drawing An Image File

The ImageFileDemo.java code listing (below) shows how to import and draw an image from a file. This program works with the GraphicsImporteDrawer object to import and display a variety of image file formats. The media required for this sample code is any image file that can be imported using the GraphicsImporterDrawer. The quicktime.app.image package has two primary image display classes: GraphicsImporteDrawer and ImagePresenter. These classes implement both ImageSpec and QTDrawable interfaces.
GraphicsImporterDrawer uses GraphicsImporter to read, decompress, and display image files.

The ImageFileDemo.java code listing:

import java.awt.*;
import java.awt.event.*;

import quicktime.*;
import quicktime.std.StdQTConstants;
import quicktime.std.image.GraphicsImporter;
import quicktime.io.QTFile;

import quicktime.app.display.QTCanvas;
import quicktime.app.image.*;

/** QuickTime Graphics Importer and Codec demo */
public class ImageFileDemo extends Frame implements StdQTConstants {		
	
	public static void main (String args[]) {
		try {
			QTSession.open();

			int[] fileTypes = { kQTFileTypeGIF, kQTFileTypeJPEG, kQTFileTypePicture };
			QTFile qtf = QTFile.standardGetFilePreview (fileTypes);

			ImageFileDemo ifd = new ImageFileDemo (qtf);
			ifd.pack();
			ifd.show();
			ifd.toFront();
		} catch (QTException e) {
			if (e.errorCode() != Errors.userCanceledErr)
				e.printStackTrace();
			QTSession.close();
		}
	}

	ImageFileDemo (QTFile qtf) throws QTException {
		super (qtf.getName());
		
		QTCanvas canv = new QTCanvas();
		add (canv, "Center");
		
		GraphicsImporterDrawer myImageFile = new GraphicsImporterDrawer (qtf);		
		canv.setClient (myImageFile, true);

		addWindowListener(new WindowAdapter () {
			public void windowClosing (WindowEvent e) {
				QTSession.close();
				dispose();
			}

			public void windowClosed (WindowEvent e) {
				System.exit(0);
			}
		});
	}
}