我遇到活动JInternalFrame的问题。我需要指出一个活动的ImageInternalFrame(我的类,它扩展JInternalFrame),因为我将对它执行一些操作。我不知道如何解决它,有人可以帮助我吗?
这是我的代码:
public class MainFrame extends javax.swing.JFrame {
ArrayList <ImageInternalFrame> imageInternalFrameList = new ArrayList();
private void openMenuItemActionPerformed(java.awt.event.ActionEvent evt) {
JFileChooser chooser = new JFileChooser();
chooser.showOpenDialog(null);
File f = chooser.getSelectedFile();
String filePath = f.getPath();
BufferedImage bufferedImage;
ImageInternalFrame imageInternalFrame;
String mimetype= new MimetypesFileTypeMap().getContentType(f);
String type = mimetype.split("/")[0];
if(type.equals("image")){
bufferedImage = null;
try {
bufferedImage = ImageIO.read(new File(filePath));
} catch (IOException ex) {
Logger.getLogger(MainFrame.class.getName()).log(Level.SEVERE, null, ex);
}
imageInternalFrame = new ImageInternalFrame(filePath);
imageInternalFrame.setSize( bufferedImage.getWidth(), bufferedImage.getHeight() );
imageInternalFrame.setVisible(true);
imageInternalFrame.setLocation(imageInternalFrameList.size() * 25 , imageInternalFrameList.size() * 25);
add(imageInternalFrame);
imageInternalFrameList.add(imageInternalFrame);
}
else{
JOptionPane.showMessageDialog(null, "It's NOT an image");
}}
public class ImageInternalFrame extends javax.swing.JInternalFrame {
public ImageInternalFrame( String imagePath ) {
initComponents();
setImage(imagePath);
}
public void setImage(String imagePath){
imageLabel.setIcon( new ImageIcon(imagePath) );
imageLabel.paintImmediately(imageLabel.getVisibleRect());
}
}
答案 0 :(得分:2)
您可以使用getSelectedFrame()
课程的JDesktop
方法。
imageLabel.setIcon( new ImageIcon(imagePath) );
imageLabel.paintImmediately(imageLabel.getVisibleRect());
不要使用paintImmeditately。更改图标时,Swing将自动安排重新绘制标签。