I'm actually codding a keypad for an application and I'm encountering a problem. I'm using some empty space in the JDialog I'm creating to place an exist button on the top right corner of the Dialog box. This empty space is creating a border to the dialog box which is unpleasant to see. So I've tried to make panels transparent with setOpaque(false) function, but I achieved nothing. Do I have to use the paint function (which I don't know how to use) ?
Here is my test function without the setOpaque tests I've done :
package test;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import javax.swing.*;
public class Test {
public static JFrame frame;
public static void main(String args[]){
frame = new JFrame();
JPanel panel = new JPanel();
panel.setSize(400, 400);
panel.setBackground(Color.CYAN);
panel.setLayout(new GridBagLayout());
JTextField text = new JTextField("coucou");
panel.add(text);
text.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent e) {
text.setText("");
openKeypad(text);
}
});
frame.setContentPane(panel);
frame.setSize(400, 400);
frame.setUndecorated(true);
frame.setLocation(50,0);
frame.setVisible(true);
}
private static void openKeypad(JTextField text) {
KeyPad pad = new KeyPad(frame, text);
}
}
KeyPad class :
package test;
import java.awt.Dimension;
import java.awt.GridLayout;
import java.awt.Image;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import javax.imageio.ImageIO;
import javax.swing.*;
import javax.swing.border.EmptyBorder;
public class KeyPad extends JDialog {
private JTextField field;
public KeyPad(JFrame parent, JTextField field_) {
super(parent, true);
//Initializing field
field = field_;
//Setting layout
JPanel panelButton = new JPanel();
panelButton.setLayout(new GridLayout(4, 3));
//Buttons declaration
JButton b0 = new JButton("0");
JButton b1 = new JButton("1");
JButton b2 = new JButton("2");
JButton b3 = new JButton("3");
JButton b4 = new JButton("4");
JButton b5 = new JButton("5");
JButton b6 = new JButton("6");
JButton b7 = new JButton("7");
JButton b8 = new JButton("8");
JButton b9 = new JButton("9");
JButton bp = new JButton(".");
JButton del = new JButton();
JButton close = new JButton();
//Setting buttons icons
try {
Image img = ImageIO.read(new File("ressources/closeIcon.png"));
close.setIcon(new ImageIcon(img));
img = ImageIO.read(new File("ressources/deleteIcon.png"));
del.setIcon(new ImageIcon(img));
close.setOpaque(false);
close.setBorder(new EmptyBorder(0, 0, 0, 0));
close.setContentAreaFilled(false);
}catch (Exception e) {
System.out.println(e);
}
//Buttons sizing
b0.setPreferredSize(new Dimension(64, 64));
b1.setPreferredSize(new Dimension(64, 64));
b2.setPreferredSize(new Dimension(64, 64));
b3.setPreferredSize(new Dimension(64, 64));
b4.setPreferredSize(new Dimension(64, 64));
b5.setPreferredSize(new Dimension(64, 64));
b6.setPreferredSize(new Dimension(64, 64));
b7.setPreferredSize(new Dimension(64, 64));
b8.setPreferredSize(new Dimension(64, 64));
b9.setPreferredSize(new Dimension(64, 64));
bp.setPreferredSize(new Dimension(64, 64));
del.setPreferredSize(new Dimension(64, 64));
close.setPreferredSize(new Dimension(32, 32));
//Adding buttons to the panelButton
panelButton.add(b7);
panelButton.add(b8);
panelButton.add(b9);
panelButton.add(b4);
panelButton.add(b5);
panelButton.add(b6);
panelButton.add(b1);
panelButton.add(b2);
panelButton.add(b3);
panelButton.add(bp);
panelButton.add(b0);
panelButton.add(del);
//Adding Listeners
b0.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
addDigit('0');
}
});
b1.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
addDigit('1');
}
});
b2.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
addDigit('2');
}
});
b3.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
addDigit('3');
}
});
b4.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
addDigit('4');
}
});
b5.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
addDigit('5');
}
});
b6.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
addDigit('6');
}
});
b7.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
addDigit('7');
}
});
b8.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
addDigit('8');
}
});
b9.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
addDigit('9');
}
});
bp.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
addDigit('.');
}
});
del.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
delDigit();
}
});
close.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
disposeDialog();
}
});
//Placing close button
JPanel panelClose = new JPanel();
panelClose.setLayout(new BoxLayout(panelClose, BoxLayout.X_AXIS));
panelClose.add(Box.createRigidArea(new Dimension(64*3, 1)));
panelClose.add(close);
JPanel test = new JPanel();
test.setLayout(new BoxLayout(test, BoxLayout.X_AXIS));
test.add(panelButton);
test.add(Box.createRigidArea(new Dimension(32, 1)));
//Setting main panel
JPanel panel = new JPanel();
panel.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS));
panel.add(panelClose);
panel.add(test);
//Setting and displaying the Dialog Box
this.setContentPane(panel);
this.setUndecorated(true);
this.pack();
this.setVisible(true);
}
private void addDigit(char i) {
field.setText(field.getText() + i);
}
private void delDigit() {
if(field.getText().length() > 0) {
field.setText(field.getText().substring(0, field.getText().length() - 1));
}
}
private void disposeDialog() {
this.dispose();
}
}
/////EDIT///////
Here is my keypad code at the moment if someone wants to use it, feel free.
package mainPackage;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import java.awt.GridLayout;
import java.awt.Image;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import javax.imageio.ImageIO;
import javax.swing.*;
import javax.swing.border.EmptyBorder;
public class KeyPad extends JDialog {
private GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
private GraphicsDevice[] gs = ge.getScreenDevices();
private JTextField field;
public KeyPad(JDialog parent, JTextField field_, String placement) {
super(parent, true);
//Initializing field
field = field_;
//Setting layout
JPanel panelButton = new JPanel();
panelButton.setLayout(new GridLayout(4, 3));
//Buttons declaration
JButton b0 = new JButton("0");
JButton b1 = new JButton("1");
JButton b2 = new JButton("2");
JButton b3 = new JButton("3");
JButton b4 = new JButton("4");
JButton b5 = new JButton("5");
JButton b6 = new JButton("6");
JButton b7 = new JButton("7");
JButton b8 = new JButton("8");
JButton b9 = new JButton("9");
JButton bp = new JButton(".");
JButton del = new JButton();
JButton close = new JButton();
//Setting buttons icons
try {
Image img = ImageIO.read(new File("ressources/closeIcon.png"));
close.setIcon(new ImageIcon(img));
img = ImageIO.read(new File("ressources/deleteIcon.png"));
del.setIcon(new ImageIcon(img));
close.setOpaque(false);
close.setBorder(new EmptyBorder(0, 0, 0, 0));
close.setContentAreaFilled(false);
}catch (Exception e) {
System.out.println(e);
}
//Buttons sizing
b0.setPreferredSize(new Dimension(64, 64));
b1.setPreferredSize(new Dimension(64, 64));
b2.setPreferredSize(new Dimension(64, 64));
b3.setPreferredSize(new Dimension(64, 64));
b4.setPreferredSize(new Dimension(64, 64));
b5.setPreferredSize(new Dimension(64, 64));
b6.setPreferredSize(new Dimension(64, 64));
b7.setPreferredSize(new Dimension(64, 64));
b8.setPreferredSize(new Dimension(64, 64));
b9.setPreferredSize(new Dimension(64, 64));
bp.setPreferredSize(new Dimension(64, 64));
del.setPreferredSize(new Dimension(64, 64));
close.setPreferredSize(new Dimension(32, 32));
//Adding buttons to the panelButton
panelButton.add(b7);
panelButton.add(b8);
panelButton.add(b9);
panelButton.add(b4);
panelButton.add(b5);
panelButton.add(b6);
panelButton.add(b1);
panelButton.add(b2);
panelButton.add(b3);
panelButton.add(bp);
panelButton.add(b0);
panelButton.add(del);
panelButton.setOpaque(false);
//Adding Listeners
b0.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
addDigit('0');
}
});
b1.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
addDigit('1');
}
});
b2.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
addDigit('2');
}
});
b3.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
addDigit('3');
}
});
b4.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
addDigit('4');
}
});
b5.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
addDigit('5');
}
});
b6.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
addDigit('6');
}
});
b7.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
addDigit('7');
}
});
b8.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
addDigit('8');
}
});
b9.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
addDigit('9');
}
});
bp.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
addDigit('.');
}
});
del.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
delDigit();
}
});
close.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
disposeDialog();
}
});
//Placing close button
JPanel panelClose = new JPanel();
panelClose.setLayout(new BoxLayout(panelClose, BoxLayout.X_AXIS));
panelClose.add(Box.createRigidArea(new Dimension(64*3, 1)));
panelClose.add(close);
panelClose.setOpaque(false);
JPanel panelButtonWithPadding = new JPanel();
panelButtonWithPadding.setLayout(new BoxLayout(panelButtonWithPadding, BoxLayout.X_AXIS));
panelButtonWithPadding.add(panelButton);
panelButtonWithPadding.add(Box.createRigidArea(new Dimension(32, 1)));
panelButtonWithPadding.setOpaque(false);
//Setting main panel
JPanel panel = new JPanel();
panel.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS));
panel.add(panelClose);
panel.add(panelButtonWithPadding);
panel.setOpaque(false);
//Setting dialog box transparency
panelButton.setOpaque(false);
panelClose.setOpaque(false);
panelButtonWithPadding.setOpaque(false);
panel.setOpaque(false);
//Setting and displaying the Dialog Box
this.setContentPane(panel);
this.setUndecorated(true);
this.setBackground( new Color(0, 0, 0, 0) ); // set transparency on JDialog only
this.pack();
//To place the KeyPad anywhere on the panel
switch(placement) {
case "BOTTOM_LEFT":
this.setLocation(gs[Main.screen].getDefaultConfiguration().getBounds().x, 600 - (int) this.getSize().getHeight());
break;
case "BOTTOM_CENTER":
this.setLocation(gs[Main.screen].getDefaultConfiguration().getBounds().x + (int) ((800 - this.getSize().getWidth())/2) , 600 - (int) this.getSize().getHeight());
break;
case "BOTTOM_RIGHT":
this.setLocation(gs[Main.screen].getDefaultConfiguration().getBounds().x + (int) (800 - this.getSize().getWidth()), 600 - (int) this.getSize().getHeight());
break;
case "CENTER_LEFT":
this.setLocation(gs[Main.screen].getDefaultConfiguration().getBounds().x, (int) (600 - this.getSize().getHeight())/2);
break;
case "CENTER":
this.setLocation(gs[Main.screen].getDefaultConfiguration().getBounds().x + (int) ((800 - this.getSize().getWidth())/2), (int) (600 - this.getSize().getHeight())/2);
break;
case "CENTER_RIGHT":
this.setLocation(gs[Main.screen].getDefaultConfiguration().getBounds().x + (int) (800 - this.getSize().getWidth()), (int) (600 - this.getSize().getHeight())/2);
break;
case "TOP_LEFT":
this.setLocation(gs[Main.screen].getDefaultConfiguration().getBounds().x, 0);
break;
case "TOP_CENTER":
this.setLocation(gs[Main.screen].getDefaultConfiguration().getBounds().x + (int) ((800 - this.getSize().getWidth())/2), 0);
break;
case "TOP_RIGHT":
this.setLocation(gs[Main.screen].getDefaultConfiguration().getBounds().x + (int) (800 - this.getSize().getWidth()), 0);
break;
}
this.setVisible(true);
}
private void addDigit(char i) {
field.setText(field.getText() + i);
}
private void delDigit() {
if(field.getText().length() > 0) {
field.setText(field.getText().substring(0, field.getText().length() - 1));
}
}
private void disposeDialog() {
this.dispose();
}
}
Simple example for making a JFrame transparent:
import java.awt.*;
import static java.awt.GraphicsDevice.WindowTranslucency.TRANSLUCENT;
import javax.swing.*;
class TransparentFrame extends JFrame
{
public TransparentFrame()
{
JPanel panel = new JPanel();
panel.setOpaque( false );
panel.add( new JButton("Button") );
add(panel, BorderLayout.SOUTH);
setUndecorated(true);
setSize(300, 300);
//pack();
// setOpacity(0.5f); // set transparency on frame and components
setBackground( new Color(0, 0, 0, 64) ); // set transparency on frame only
setTitle("Transparent Frame Demo");
setDefaultCloseOperation(DISPOSE_ON_CLOSE);
}
public static void main(String args[])
{
GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
GraphicsDevice gd = ge.getDefaultScreenDevice();
// Exit when translucent windows aren't supported
if (!gd.isWindowTranslucencySupported(TRANSLUCENT))
{
System.err.println( "Translucency is not supported" );
System.exit(0);
}
// Create the GUI on the event-dispatching thread
SwingUtilities.invokeLater(() -> new TransparentFrame().setVisible(true));
}
}