Drawing an Image File

Example 0.7 shows how to import and draw an image from a file. This program works with the GraphicsImporterDrawer 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: GraphicsImporterDrawer and ImagePresenter . These classes implement both ImageSpec and QTDrawable interfaces. GraphicsImporterDrawer uses GraphicsImporter to read, decompress, and display image files.

ImageFileDemo.java


import quicktime.*;

import quicktime.std.StdQTConstants;

import quicktime.std.image.GraphicsImporter;

import quicktime.io.QTFile;



import quicktime.app.display.QTCanvas;

import quicktime.app.image.*;



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);

            }

        });

    }

}