我对Java并不熟悉,对于当前的问题我有点无知。 我试图在我的主JFrame的一个单独的类中绘制图像,但它总是只画出一小片图片(可能是10x10px)。 (使用标签工作的测试)drawImage在单独的jpanel中绘制只是一块
也许我没有使用g.drawImage方法正确,或者JPanel没有足够的空间?
主窗口:
public class Deconvolutioner extends JFrame {
Draw z;
Picturearea picturearea;
class Draw extends JPanel {
public void paint(Graphics g) {
}
}
public Deconvolutioner() {
setTitle("Deconvolutioner");
setLocation(30,1);
setSize(1300,735);
super.setFont(new Font("Arial",Font.BOLD,11));
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
FlowLayout flow = new FlowLayout(FlowLayout.CENTER);
this.setLayout(flow);
picturearea = new Picturearea();
this.add(picturearea);
add(z = new Draw());
setVisible(true);
}
class Open implements ActionListener {
public void actionPerformed(ActionEvent e) {
JFileChooser fileOpen = new JFileChooser();
FileFilter filter = new FileNameExtensionFilter("png & jpg files", "png",
"jpg");
fileOpen.addChoosableFileFilter(filter);
int returnVal = fileOpen.showDialog(null, "Open file");
if (returnVal == JFileChooser.APPROVE_OPTION) {
try {
String path = fileOpen.getSelectedFile().getPath();
URL url = new File(path).toURI().toURL();
BufferedImage img = ImageIO.read(url);
picturearea.setPicture(img);
} catch (IOException ex) {
System.err.println("Some IOException accured (set the right path?): ");
System.err.println(ex.getMessage());
}
} else {
}
repaint();
}
}
而单独的类:
public class Picturearea extends JPanel {
public BufferedImage image;
Draw z;
public Picturearea() {
add(z = new Draw());
setVisible(true);
}
class Draw extends JPanel {
@Override
public void paint(Graphics g) {
g.drawImage(image, 0, 0, this);
}
}
public void setPicture(BufferedImage picture) {
try {
image = picture;
} catch (Exception e) {
System.err.println("Some IOException accured (did you set the right path?): ");
System.err.println(e.getMessage());
}
repaint();
}
}
我对每一个帮助表示感谢。
感谢您的时间。
'带有标签的测试工作)' - 那你为什么试图另起炉灶?当以实际大小绘制图像时,应该只使用JLabel。当您需要自定义图像时,您应该只使用自定义绘画。保持你的代码简单。 – camickr