Add background image to JTable
I am using JInternalFrame
what I added JTable
. Now I want to show the background image in JTable
. so I added the following code to the code JScrollPane's
.
jScrollPane1 = new javax.swing.JScrollPane(ViewBalanceReportTable) {{
setOpaque(false);
getViewport().setOpaque(false);
}
@Override
protected void paintComponent(Graphics g) {
final int imageWidth = image.getIconWidth();
final int imageHeight = image.getIconHeight();
final Dimension d = getSize();
final int x = (d.width - imageWidth)/2;
final int y = (d.height - imageHeight)/2;
g.drawImage(image.getImage(), x, y, null, null);
super.paintComponent(g);
}
}
but still it doesnt show the background image, can anyone help me on this
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1 answer
Basically, you need to make sure EVERYTHING that sits on top of the frame is transparent (opaque == false).
The table is a special case, it has nothing to do with customization opaque
, because it will be easy. Instead, we can trick it by using a transparent color.
You AWLAYS better replace the content area if you want to paint to any frame. This will allow you to draw in the content area, rather than the areas used by elements such as frame borders or menus.
public class TableWithBackground {
public static void main(String[] args) {
new TableWithBackground();
}
public TableWithBackground() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
}
JDesktopPane desktopPane = new JDesktopPane();
BackgroundInternalFrame backgroundInternalFrame = new BackgroundInternalFrame();
desktopPane.add(backgroundInternalFrame);
try {
backgroundInternalFrame.setMaximum(true);
} catch (PropertyVetoException ex) {
ex.printStackTrace();
}
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new BorderLayout());
frame.add(desktopPane);
frame.setSize(200, 200);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class BackgroundInternalFrame extends JInternalFrame {
public BackgroundInternalFrame() {
super("Hello", true, true, true, true);
setSize(100, 100);
setLocation(10, 10);
setVisible(true);
setContentPane(new TransparentContentPane());
JTable table = new JTable();
table.setModel(new javax.swing.table.DefaultTableModel(
new Object[][]{
{null, null, null, null},
{null, null, null, null},
{null, null, null, null},
{null, null, null, null}
},
new String[]{
"Title 1", "Title 2", "Title 3", "Title 4"
}));
JScrollPane scrollPane = new JScrollPane(table);
setLayout(new BorderLayout());
add(scrollPane);
scrollPane.setOpaque(false);
scrollPane.getViewport().setOpaque(false);
table.setOpaque(false);
table.setBackground(new Color(255, 255, 255, 0));
}
}
public class TransparentContentPane extends JPanel {
public TransparentContentPane() {
setOpaque(false);
}
@Override
protected void paintComponent(Graphics g) {
Graphics2D g2d = (Graphics2D) g.create();
g2d.setColor(getBackground());
g2d.fillRect(0, 0, getWidth(), getHeight());
g2d.setColor(Color.RED);
g2d.drawLine(0, 0, getWidth(), getHeight());
super.paintComponent(g2d); //To change body of generated methods, choose Tools | Templates.
g2d.dispose();
}
}
}
Image table
Perhaps a "simpler" solution would be to make the image right in front of the table. This means that the image becomes separate from the table and will scroll with it.
This is a bit tricky as it JTable#paintComponent
not only fills in the background, but also displays the contents of the tables.
public class TableBackground {
private BufferedImage background;
public static void main(String[] args) {
new TableBackground();
}
public TableBackground() {
try {
background = ImageIO.read(new File("C:/Users/swhitehead/Documents/My Dropbox/issue362.jpg"));
} catch (IOException ex) {
ex.printStackTrace();
}
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
}
JDesktopPane desktopPane = new JDesktopPane();
JInternalFrame ittyFrame = new JInternalFrame("Hello", true, true, true, true);
ittyFrame.setSize(100, 100);
ittyFrame.setLocation(0, 0);
ittyFrame.setVisible(true);
desktopPane.add(ittyFrame);
try {
ittyFrame.setMaximum(true);
} catch (PropertyVetoException ex) {
ex.printStackTrace();
}
Object[][] data = new Object[50][4];
for (int row = 0; row < 50; row++) {
for (int col = 0; col < 4; col++) {
data[row][col] = col + "." + row;
}
}
JTable table = new BackgroundImageTable();
table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
table.setModel(new javax.swing.table.DefaultTableModel(
data,
new String[]{
"Title 1", "Title 2", "Title 3", "Title 4"
}));
table.setForeground(Color.WHITE);
JScrollPane scrollPane = new JScrollPane(table);
ittyFrame.setLayout(new BorderLayout());
ittyFrame.add(scrollPane);
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new BorderLayout());
frame.add(desktopPane);
frame.setSize(200, 200);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class BackgroundInternalFrame extends JInternalFrame {
public BackgroundInternalFrame() {
super("Hello", true, true, true, true);
setSize(100, 100);
setLocation(10, 10);
setVisible(true);
setContentPane(new TransparentContentPane());
JTable table = new JTable();
table.setModel(new javax.swing.table.DefaultTableModel(
new Object[][]{
{null, null, null, null},
{null, null, null, null},
{null, null, null, null},
{null, null, null, null}
},
new String[]{
"Title 1", "Title 2", "Title 3", "Title 4"
}));
JScrollPane scrollPane = new JScrollPane(table);
setLayout(new BorderLayout());
add(scrollPane);
scrollPane.setOpaque(false);
scrollPane.getViewport().setOpaque(false);
table.setOpaque(false);
table.setBackground(new Color(255, 255, 255, 0));
}
}
}
Sticky viewport
Another option is to create a custom viewport. This allows content to be displayed behind other components. This will lead to the same problem as before. The table and background should be transparent.
It also means that with some clever work, you either have an image to "stick" or "follow" the content, whichever you want.
public class TableBackground {
private BufferedImage background;
public static void main(String[] args) {
new TableBackground();
}
public TableBackground() {
try {
background = ImageIO.read(new File("C:/Users/swhitehead/Documents/My Dropbox/issue362.jpg"));
} catch (IOException ex) {
ex.printStackTrace();
}
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
}
JDesktopPane desktopPane = new JDesktopPane();
JInternalFrame ittyFrame = new JInternalFrame("Hello", true, true, true, true);
ittyFrame.setSize(100, 100);
ittyFrame.setLocation(0, 0);
ittyFrame.setVisible(true);
desktopPane.add(ittyFrame);
try {
ittyFrame.setMaximum(true);
} catch (PropertyVetoException ex) {
ex.printStackTrace();
}
Object[][] data = new Object[50][4];
for (int row = 0; row < 50; row++) {
for (int col = 0; col < 4; col++) {
data[row][col] = col + "." + row;
}
}
JTable table = new JTable();
table.setForeground(Color.WHITE);
table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
table.setModel(new javax.swing.table.DefaultTableModel(
data,
new String[]{
"Title 1", "Title 2", "Title 3", "Title 4"
}));
JScrollPane scrollPane = new JScrollPane();
table.setOpaque(false);
table.setBackground(new Color(255, 255, 255, 0));
scrollPane.setViewport(new ImageViewport());
scrollPane.setViewportView(table);
ittyFrame.setLayout(new BorderLayout());
ittyFrame.add(scrollPane);
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new BorderLayout());
frame.add(desktopPane);
frame.setSize(200, 200);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class ImageViewport extends JViewport {
public ImageViewport() {
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
if (background != null) {
Rectangle bounds = getViewRect();
int x = Math.max(0, (bounds.width - background.getWidth()) / 2);
int y = Math.max(0, (bounds.height - background.getHeight()) / 2);
g.drawImage(background, x, y, this);
}
}
}
}
Many of them will fit your actual requirements.
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