JPanel to fit the JFrame
Hi there,
I have a GUI based on a JFrame.
In my JFrame, I have a MainPanel in the center and a ButtonPanel (with some JButtons) in the bottom.
The MainPanel is used for drawing purpose to display various informations and is created with a default size 300x300.
However, to take advantage of high resolution screens, I would like the user to be able to resize the JFrame, and the MainPanel to resize automatically to fit the available space (in order to be able to display more info) but I don't know how to implement that. Any ideas?
Thanks
import java.awt.*;
import javax.swing.*;
class Testing extends JFrame
public Testing()
setDefaultCloseOperation(EXIT_ON_CLOSE);
JPanel main = new JPanel(new BorderLayout());
JPanel bottom = new JPanel();
bottom.add(new JButton("Button 1"));
bottom.add(new JButton("Button 2"));
bottom.add(new JButton("Button 3"));
main.add(new JTextArea(),BorderLayout.CENTER);
main.add(bottom,BorderLayout.SOUTH);
getContentPane().add(main);
Dimension dim = Toolkit.getDefaultToolkit().getScreenSize();
setSize((int)dim.getWidth(),(int)dim.getHeight());
public static void main(String[] args){new Testing().setVisible(true);}
}
Similar Messages
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Need help:JPanel not being displayed in the JFrame
Hello,
I have a class called ConstructRoom.java which extends JFrame and another class called DimensionsPanel.java which extends JPanel. In the ConstructRoom class I use the following theContainer.add(new DimensionsPanel());, so I can display my JPanel. Well I get the JFrame but no JPanel. When the this call is made the DimensionsPanel.java code is cycled through, Where has my JPanel gone to?
If I change the DimensionPanel.java extend JFrame and add the the JFrame code. Then I get the JFrame and the JPanel.
Whats going on here?
ThanksI made some of the changes with no luck. Here is some of the code:
---------from ConstructRoom.java--------
//Imports
public class ConstructRoom extends JFrame
//----Member objects and varibles
private static String theTitle; //Varible for title of frame
private JFrame theFrame; //Object for the JFrame
// ----------------------------------------------------------- ConstructRoom
public ConstructRoom(String theTitle)
super(theTitle); //JFrame super class
theFrame = new JFrame("My frame");
Container theContainer = theFrame.getContentPane(); //Frame container
theContainer.setLayout(new FlowLayout());
theContainer.add(new DimensionsPanel());
theFrame.pack();
theFrame.setBounds(10,10,400, 400);
theFrame.addWindowListener(new WindowHandler());
theFrame.setVisible(true);
}//end ConstructRoom(String theTitle)
// -------------------------------------------------------------------- main
public static void main(String args[])
ConstructRoom theRoom = new ConstructRoom(theTitle);
}//end main(String args[])
//----WindowHander
}//end class ConstructRoom extends JFrame
--------from DimensionsPanel.java
//Imports
public class DimensionsPanel extends JPanel
//----Member objects and varibles
private JPanel dimensionsPanel; //The main panel to hold all info
private Box panelBox; //Box for all boxes which is added to the JPanel
private Box furnListBox; //Box for all related items of the furnList
private Box dimensionsBox; //Box for all dimensions (x, y, z)
private Box xFieldBox; //Box for all related items of the xField
private Box yFieldBox; //Box for related items of the yField
private Box zFieldBox; //Box for related items of the zField
private Box buttonsBox; //Box for all buttons
private Box clearBox; //Box for related clear button items
private Box buildBox; //Box for related build button items
private JLabel furnListLabel; //Label for the furnList comboBox
private JLabel xFieldLabel; //Label for the xField
private JLabel yFieldLabel; //Label for yField
private JLabel zFieldLabel; //Label for zField
private JTextField xField; //Text field to enter the x dimension
private JTextField yField; //Text field to enter the y dimension
private JTextField zField; //Text field to enter the z dimension
private JComboBox furnList; //List of selectable furniture objects
private JButton clearButton; //Clear button
private JButton buildButton; //Build button
// --------------------------------------------------------- DimensionsPanel
public DimensionsPanel()
//----Setting up dimensions panel
dimensionsPanel = new JPanel();
dimensionsPanel.setLayout(new BorderLayout());
dimensionsPanel.setPreferredSize(new Dimension(150,150));
dimensionsPanel.setBorder(new TitledBorder(new EtchedBorder(),
"Select Furniture and Enter Dimensions"));
//----Initializing GUI components
furnListLabel = new JLabel("Select from list ");
furnList = new JComboBox();
xFieldLabel = new JLabel("Enter Width ");
xField = new JTextField();
yFieldLabel = new JLabel("Enter Height ");
yField = new JTextField();
zFieldLabel = new JLabel("Enter Depth ");
zField = new JTextField();
buildButton = new JButton("Build Object");
clearButton = new JButton("Clear Object");
//-----Setting up the combo box and adding items
furnList.addActionListener(new ComboProcessor());
furnList.addItem(" "); //Default item
furnList.addItem("Color Cube");
furnList.setMaximumRowCount(6); //Max number of items before scrolling
furnList.setSelectedItem(" "); //Set initial to default item
//--Add the furnList to its box for placement in the JPanel
furnListBox = Box.createHorizontalBox();
furnListBox.add(Box.createHorizontalStrut(5));
furnListBox.add(furnListLabel); //Adding the combo box label
furnListBox.add(furnList); //Adding the combo box
furnListBox.add(Box.createHorizontalStrut(5)); //Spacing
//-------------------------------- Start Dimensions Components
//----Setting up the xField
xField.setEnabled(false); //Disabled at start
xField.setFocusTraversalKeysEnabled(false); //Disabling the Tab Key
//----Adding the event listeners
xField.addActionListener(new XTextProcessor()); //Enter Key
xField.addMouseListener(new ClickProcessor()); //Mouse Click
//--Add the xField to its box for placement in the dimensionsBox
xFieldBox = Box.createHorizontalBox();
xFieldBox.add(Box.createHorizontalStrut(10)); //Spacing
xFieldBox.add(Box.createGlue()); //Take up extra space
xFieldBox.add(xFieldLabel); //Adding the text field label
xFieldBox.add(xField); //Adding the text field
xFieldBox.add(Box.createHorizontalStrut(100)); //Spacing
//----Setting up the yfield
yField.setEnabled(false); //Disabled at start
yField.setFocusTraversalKeysEnabled(false); //Disabling TAB KEY
//----Adding the event listeners
yField.addActionListener(new YTextProcessor()); //Enter Key
yField.addMouseListener(new ClickProcessor()); //Mouse Click
//--Add the yField to its box for placement in the dimensionsBox
yFieldBox = Box.createHorizontalBox();
yFieldBox.add(Box.createHorizontalStrut(10)); //Spacing
yFieldBox.add(Box.createGlue()); //Take up extra space
yFieldBox.add(yFieldLabel); //Adding the text field label
yFieldBox.add(yField); //Adding the text field
yFieldBox.add(Box.createHorizontalStrut(100)); //Spacing
//----Setting up the zfield
zField.setEnabled(false); //Disabled at start
zField.setFocusTraversalKeysEnabled(false); //Disabling TAB KEY
//----Adding the event listeners
zField.addActionListener(new ZTextProcessor()); //Enter Key
zField.addMouseListener(new ClickProcessor()); //Mouse Click
//--Add the zField to its box for placement in the dimensionsBox
zFieldBox = Box.createHorizontalBox();
zFieldBox.add(Box.createHorizontalStrut(10)); //Spacing
zFieldBox.add(Box.createGlue()); //Take up extra space
zFieldBox.add(zFieldLabel); //Adding the text field label
zFieldBox.add(zField); //Adding the text field
zFieldBox.add(Box.createHorizontalStrut(100)); //Spacing
//----Adding all dimension components to the dimensionsBox
dimensionsBox = Box.createVerticalBox();
dimensionsBox.add(xFieldBox); //Adding the xFieldBox
dimensionsBox.add(Box.createVerticalStrut(10)); //Spacing
dimensionsBox.add(yFieldBox); //Adding the yFieldBox
dimensionsBox.add(Box.createVerticalStrut(10)); //Spacing
dimensionsBox.add(zFieldBox); //Adding the zFieldBox
//-------------------------------- End Dimension Components
//----Setting up the clearButton
clearButton.setEnabled(false); //Disabled at start
//----Adding the event listener
clearButton.addActionListener(new ClearProcessor());
//--Add the clear button to its box for placement
clearBox = Box.createHorizontalBox();
clearBox.add(Box.createHorizontalStrut(5)); //Spacing
clearBox.add(clearButton); //Adding the clearButton
//----Setting up the buildButton
buildButton.setEnabled(false); //Disabled at start
//--Add the action listener here
buildBox = Box.createHorizontalBox();
buildBox.add(buildButton); //Adding the buildButton
buildBox.add(Box.createHorizontalStrut(5)); //Spacing
//----Adding both buttons the buttonsBox
buttonsBox = Box.createHorizontalBox();
buttonsBox.add(clearBox); //Adding the clearBox
buttonsBox.add(Box.createHorizontalStrut(10)); //Spacing
buttonsBox.add(buildBox); //Adding the buildBox
//----Create the JPanel (dimensionsPanel)
//--Creating the main box to be added to the JPanel
panelBox = Box.createVerticalBox();
panelBox.add(furnListBox); //Adding the furnListBox components
panelBox.add(Box.createVerticalStrut(10)); //Spacing
panelBox.add(dimensionsBox); //Adding the dimensionBox components
panelBox.add(Box.createVerticalStrut(10)); //Spacing
panelBox.add(buttonsBox); //Adding the buttonsBox components
panelBox.add(Box.createVerticalStrut(10)); //Spacing
dimensionsPanel.add(panelBox); //Adding all components to the JPanel
System.out.println("end dimensionpanel");
}//end DimensionsPanel()
//------ActionListeners
}//end class DimensionsPanel extends JPanel -
Calling a method on a jFrame from a jPanel that created by the jFrame
Hi all
I can not for the life of me work out how to do this.
Calling a method on a jFrame from a jPanel that created by the jFrame.
I have used this code to set a handle for one jPanel to another.
i.e I can create new jpanel and pass in handles from one to another but not back to the jFrame.
// this is sudo code
private Panel_Top topPanel;
private Menu_Panel menuPanel;
private DataPanel dataPanel;
//create new
topPanel = new Panel_Top();
menuPanel = new Menu_Panel();
dataPanel = new DataPanel();
// add handles from one to another
menuPanel.setDataPanel(dataPanel);
topPanel.setDataPanel(dataPanel);
topPanel.setMenu_Panel(menuPanel);
dataPanel.setMenu_Panel(menuPanel);
// in each class I use this to set
public void setDataPanel(DataPanel dataPanel) {
this.dataPanel = dataPanel;
}But I can not seam to get a handle back to the jFrame that created it.
Please help
as you can see I am trying but no luck so far
Thanksclass Life extends JPanel{
pulic Life( JFrame owner )
owner.doSomething(); // pass the JFrame to the constructor and feel free to use it
}[code[ -
Fit the image to window width, window height and the window size
hi all
here we wrote the code for "fit the image to window width, window height and the window size". we are facing some problems in it. and all these operations have to perform even after zooming operations are done.if the below code doesnt satisfy kindly provide appropriate code .
thanks .
import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import java.awt.image.BufferedImage;
import java.io.*;
import javax.imageio.ImageIO;
import javax.swing.*;
import java.io.File;
import javax.swing.filechooser.FileFilter;
import java.awt.geom.*;
public class DP extends JFrame implements ActionListener,
MouseListener,
MouseMotionListener {
private final int PEN_OP = 1;
private final int CLEAR_OP = 2;
private int radius;
private int radius1;
private int mousex = 0;
private int mousey = 0;
private int prevx = 0;
private int prevy = 0;
private boolean initialFreeHand = true;
private boolean initialLine = true;
private boolean initialEraser = true;
private int Orx = 0;
private int Ory = 0;
private int OrWidth = 0;
private int OrHeight = 0;
private int drawX = 0;
private int drawY = 0;
private int polyX = 0;
private int polyY = 0;
private int eraserLength = 5;
private int udefRedValue = 255;
private int udefGreenValue = 255;
private int udefBlueValue = 255;
private int opStatus = PEN_OP;
private int colorStatus = 1;
private double zoomPercentage=10;
private Color mainColor = new Color(0, 0, 0);
private Color xorColor = new Color(255, 255, 255);
private Color userDefinedColor =
new Color(udefRedValue, udefGreenValue,udefBlueValue);
private JButton openButton = new JButton("open");
private JButton closeButton = new JButton("close");
private JButton zoominButton = new JButton("ZoomIn");
private JButton zoomoutButton = new JButton("ZoomOut");
private JButton zoomto100Button = new JButton("ZoomTo100");
private JButton fwwButton = new JButton("Fit window width");
private JButton fwhButton = new JButton("Fit window height");
private JButton fwButton = new JButton("Fit the window");
private JButton clearButton = new JButton("Clear");
private JTextField colorStatusBar = new JTextField(20);
private JTextField opStatusBar = new JTextField(20);
private JTextField mouseStatusBar = new JTextField(10);
private JPanel controlPanel = new JPanel(new GridLayout(18, 1, 0, 0));
JToolBar jToolbar = new JToolBar();
private Container container;
private JScrollBar horizantalSlide=new JScrollBar();
public BufferedImage image;
BufferedImage bgImage;
// public ImageIcon icon=null;
JFileChooser fileChooser;
DrawPanel drawPanel = new DrawPanel(bgImage,zoomPercentage);
public DP() {
super("WhiteBoard");
fileChooser = new JFileChooser(".");
container = getContentPane();
container.setBackground(Color.white);
container.setLayout(new BorderLayout());
container.add(jToolbar,BorderLayout.NORTH);
container.add(horizantalSlide);
jToolbar.add(openButton);
jToolbar.add(closeButton);
jToolbar.add(zoominButton);
jToolbar.add(zoomoutButton);
jToolbar.add(zoomto100Button);
jToolbar.add(fwwButton);
jToolbar.add(fwhButton);
jToolbar.add(fwButton);
jToolbar.add(clearButton);
colorStatusBar.setEditable(false);
opStatusBar.setEditable(false);
mouseStatusBar.setEditable(false);
controlPanel.setBackground(Color.white);
drawPanel.setBackground(Color.white);
container.add(controlPanel, "West");
container.add(drawPanel, "Center");
openButton.addActionListener(this);
closeButton.addActionListener(this);
zoominButton.addActionListener(this);
zoomoutButton.addActionListener(this);
zoomto100Button.addActionListener(this);
fwwButton.addActionListener(this);
fwhButton.addActionListener(this);
fwButton.addActionListener(this);
clearButton.addActionListener(this);
drawPanel.addMouseMotionListener(this);
drawPanel.addMouseListener(this);
addMouseListener(this);
addMouseMotionListener(this);
opStatusBar.setText("FreeHand");
colorStatusBar.setText("Black");
public void actionPerformed(ActionEvent e) {
if(e.getActionCommand().equals("open"))
showDialog();
if(e.getActionCommand().equals("close"))
closeDialog();
if(e.getActionCommand().equals("ZoomIn"))
drawPanel.zoom(1);
if(e.getActionCommand().equals("ZoomOut"))
drawPanel.zoom(-1);
if(e.getActionCommand().equals("ZoomTo100"))
drawPanel.zoom(+10);
if(e.getActionCommand().equals("Fit window width"))
drawPanel.fitwindowwidth();
if(e.getActionCommand().equals("Fit window height"))
drawPanel.fitwindowheight();
if(e.getActionCommand().equals("Fit the window"))
drawPanel.fitthewindow();
if (e.getActionCommand() == "Clear")
opStatus = CLEAR_OP;
switch (opStatus) {
case CLEAR_OP:
clearPanel();
private void showDialog() {
if(fileChooser.showOpenDialog(this) == JFileChooser.APPROVE_OPTION) {
File file = fileChooser.getSelectedFile();
try {
bgImage = ImageIO.read(file);
} catch(IOException e) {
System.out.println("IO error: " + e.getMessage());
clearPanel();
private void closeDialog() {
drawPanel.setVisible(false);
drawPanel.repaint();
public void clearPanel() {
opStatusBar.setText("Clear");
Graphics g = image.getGraphics();
g.setColor(drawPanel.getBackground());
g.fillRect(0, 0, drawPanel.getBounds().width, drawPanel.getBounds().height);
if(bgImage != null)
g.drawImage(bgImage, 0, 0, this);
g.dispose();
drawPanel.repaint();
public boolean mouseHasMoved(MouseEvent e) {
return (mousex != e.getX() || mousey != e.getY());
public void setActualBoundry() {
if (mousex < Orx || mousey < Ory) {
if (mousex < Orx) {
OrWidth = Orx - mousex;
drawX = Orx - OrWidth;
} else {
drawX = Orx;
OrWidth = mousex - Orx;
if (mousey < Ory) {
OrHeight = Ory - mousey;
drawY = Ory - OrHeight;
} else {
drawY = Ory;
OrHeight = mousey - Ory;
} else {
drawX = Orx;
drawY = Ory;
OrWidth = mousex - Orx;
OrHeight = mousey - Ory;
public void setGraphicalDefaults(MouseEvent e) {
mousex = e.getX();
mousey = e.getY();
prevx = e.getX();
prevy = e.getY();
Orx = e.getX();
Ory = e.getY();
drawX = e.getX();
drawY = e.getY();
OrWidth = 0;
OrHeight = 0;
public void mouseDragged(MouseEvent e) {
updateMouseCoordinates(e);
switch (opStatus) {}
public void mouseReleased(MouseEvent e) {
updateMouseCoordinates(e);
switch (opStatus) {}
public void mouseEntered(MouseEvent e) {
updateMouseCoordinates(e);
public void updateMouseCoordinates(MouseEvent e) {
String xCoor = "";
String yCoor = "";
if (e.getX() < 0)
xCoor = "0";
else {
xCoor = String.valueOf(e.getX());
if (e.getY() < 0)
xCoor = "0";
else {
yCoor = String.valueOf(e.getY());
mouseStatusBar.setText("x:" + xCoor + " y:" + yCoor);
public void mouseClicked(MouseEvent e) { updateMouseCoordinates(e); }
public void mouseExited(MouseEvent e) { updateMouseCoordinates(e); }
public void mouseMoved(MouseEvent e) { updateMouseCoordinates(e); }
public void mousePressed(MouseEvent e) { updateMouseCoordinates(e); }
public static void main(String[] args) {
DP wb = new DP();
wb.setDefaultCloseOperation(EXIT_ON_CLOSE);
wb.setSize(1024,740);
wb.setVisible(true);
private class DrawPanel extends JPanel {
private double m_zoom = 1.0;
private double m_zoomPercentage;
private BufferedImage m_image;
double theta = 0;
double thetaInc = Math.PI/2;
public DrawPanel(BufferedImage imageb,double zoomPercentage) {
m_image = imageb;
m_zoomPercentage = zoomPercentage / 100;
protected void paintComponent(Graphics g) {
Graphics2D g2d=(Graphics2D)g;
if(image == null)
initImage();
g2d.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
RenderingHints.VALUE_INTERPOLATION_BICUBIC);
double x = (1.0 - m_zoom)*getWidth()/2.0;
double y = (1.0 - m_zoom)*getHeight()/2.0;
AffineTransform at = AffineTransform.getTranslateInstance(x, y);
at.rotate(theta,m_zoom*getWidth()/2,m_zoom*getHeight()/2);
at.scale(m_zoom, m_zoom);
g2d.drawRenderedImage(image, at);
public void zoom(int inc) {
m_zoom += inc * m_zoomPercentage;
repaint();
public void fitwindowwidth()
int w1=drawPanel.getWidth();
int h1=drawPanel.getHeight();
BufferedImage image2=image.getScaledInstance(w1,h1,Image.SCALE_DEFAULT);
drawPanel.setPreferredSize(new java.awt.Dimension(100,image2.getImage().getHeight(null)));
drawPanel.repaint();
public void fitwindowheight()
BufferedImage image2=image.getScaledInstance(500,680,1);
drawPanel.setImage(iicon);
drawPanel.setPreferredSize(new java.awt.Dimension(100,image2.getImage().getHeight(null)));
drawPanel.repaint();
public void fitthewindow()
BufferedImage image2=image.getScaledInstance(1000,680,1);
drawPanel.setPreferredSize(new java.awt.Dimension(100,image2.getImage().getHeight(null)));
drawPanel.repaint();
private void initImage() {
int w = getWidth();
int h = getHeight();
image = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);
Graphics2D g2 = image.createGraphics();
g2.setPaint(getBackground());
g2.fillRect(0,0,w,h);
g2.dispose();
}thank you for giving reply.
your code is very helpful to us.but i couldn't integrate it in my code.here's my code.
import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import java.awt.image.BufferedImage;
import java.io.*;
import javax.imageio.ImageIO;
import javax.swing.*;
import java.io.File;
import javax.swing.filechooser.FileFilter;
import java.awt.geom.*;
public class IS extends JFrame implements ActionListener,
MouseListener,
MouseMotionListener {
private final int PEN_OP = 1;
private final int CLEAR_OP = 2;
private final int DISTORT = 3;
private final int SCALE = 4;
private final int FIT = 5;
private final int FILL = 6;
int scaleMode = SCALE;
private int radius;
private int radius1;
private int mousex = 0;
private int mousey = 0;
private int prevx = 0;
private int prevy = 0;
private boolean initialFreeHand = true;
private boolean initialLine = true;
private boolean initialEraser = true;
private int Orx = 0;
private int Ory = 0;
private int OrWidth = 0;
private int OrHeight = 0;
private int drawX = 0;
private int drawY = 0;
private int polyX = 0;
private int polyY = 0;
private int eraserLength = 5;
private int udefRedValue = 255;
private int udefGreenValue = 255;
private int udefBlueValue = 255;
private int opStatus = PEN_OP;
private int colorStatus = 1;
private double zoomPercentage=10;
private Color mainColor = new Color(0, 0, 0);
private Color xorColor = new Color(255, 255, 255);
private Color userDefinedColor =
new Color(udefRedValue, udefGreenValue,udefBlueValue);
private JButton openButton = new JButton("open");
private JButton closeButton = new JButton("close");
private JButton zoominButton = new JButton("ZoomIn");
private JButton zoomoutButton = new JButton("ZoomOut");
private JButton zoomto100Button = new JButton("ZoomTo100");
private JButton fwwButton = new JButton("Fit window width");
private JButton fwhButton = new JButton("Fit window height");
private JButton fwButton = new JButton("Fit the window");
private JButton clearButton = new JButton("Clear");
private JTextField colorStatusBar = new JTextField(20);
private JTextField opStatusBar = new JTextField(20);
private JTextField mouseStatusBar = new JTextField(10);
private JPanel controlPanel = new JPanel(new GridLayout(18, 1, 0, 0));
JToolBar jToolbar = new JToolBar();
private Container container;
private JScrollBar horizantalSlide=new JScrollBar();
public BufferedImage image;
BufferedImage bgImage;
// public ImageIcon icon=null;
JFileChooser fileChooser;
DrawPanel drawPanel = new DrawPanel(bgImage,zoomPercentage);
public IS() {
super("WhiteBoard");
fileChooser = new JFileChooser(".");
container = getContentPane();
container.setBackground(Color.white);
container.setLayout(new BorderLayout());
container.add(jToolbar,BorderLayout.NORTH);
container.add(horizantalSlide);
jToolbar.add(openButton);
jToolbar.add(closeButton);
jToolbar.add(zoominButton);
jToolbar.add(zoomoutButton);
jToolbar.add(zoomto100Button);
jToolbar.add(fwwButton);
jToolbar.add(fwhButton);
jToolbar.add(fwButton);
jToolbar.add(clearButton);
colorStatusBar.setEditable(false);
opStatusBar.setEditable(false);
mouseStatusBar.setEditable(false);
controlPanel.setBackground(Color.white);
drawPanel.setBackground(Color.white);
container.add(controlPanel, "West");
container.add(drawPanel, "Center");
openButton.addActionListener(this);
closeButton.addActionListener(this);
zoominButton.addActionListener(this);
zoomoutButton.addActionListener(this);
zoomto100Button.addActionListener(this);
fwwButton.addActionListener(this);
fwhButton.addActionListener(this);
fwButton.addActionListener(this);
clearButton.addActionListener(this);
drawPanel.addMouseMotionListener(this);
drawPanel.addMouseListener(this);
addMouseListener(this);
addMouseMotionListener(this);
opStatusBar.setText("FreeHand");
colorStatusBar.setText("Black");
public void actionPerformed(ActionEvent e) {
if(e.getActionCommand().equals("open"))
showDialog();
if(e.getActionCommand().equals("close"))
closeDialog();
if(e.getActionCommand().equals("ZoomIn"))
drawPanel.zoom(1);
if(e.getActionCommand().equals("ZoomOut"))
drawPanel.zoom(-1);
if(e.getActionCommand().equals("ZoomTo100"))
drawPanel.zoom(+10);
if(e.getActionCommand().equals("Fit window width"))
//drawPanel.fitwindowwidth();
drawPanel.scaleImage(0,0,0,0);
if(e.getActionCommand().equals("Fit window height"))
drawPanel.scaleImage(0,0,0,0);
if(e.getActionCommand().equals("Fit the window"))
drawPanel.scaleImage(0,0,0,0);
if (e.getActionCommand() == "Clear")
opStatus = CLEAR_OP;
switch (opStatus) {
case CLEAR_OP:
clearPanel();
private void showDialog() {
if(fileChooser.showOpenDialog(this) == JFileChooser.APPROVE_OPTION) {
File file = fileChooser.getSelectedFile();
try {
bgImage = ImageIO.read(file);
} catch(IOException e) {
System.out.println("IO error: " + e.getMessage());
clearPanel();
private void closeDialog() {
drawPanel.setVisible(false);
drawPanel.repaint();
public void clearPanel() {
opStatusBar.setText("Clear");
int w = image.getWidth();
int h = image.getHeight();
Graphics g = image.getGraphics();
g.setColor(drawPanel.getBackground());
g.fillRect(0, 0, w, h);
if(bgImage != null) {
int x = (w - bgImage.getWidth())/2;
int y = (h - bgImage.getHeight())/2;
g.drawImage(bgImage, x, y, this);
g.dispose();
drawPanel.repaint();
public boolean mouseHasMoved(MouseEvent e) {
return (mousex != e.getX() || mousey != e.getY());
public void setActualBoundry() {
if (mousex < Orx || mousey < Ory) {
if (mousex < Orx) {
OrWidth = Orx - mousex;
drawX = Orx - OrWidth;
} else {
drawX = Orx;
OrWidth = mousex - Orx;
if (mousey < Ory) {
OrHeight = Ory - mousey;
drawY = Ory - OrHeight;
} else {
drawY = Ory;
OrHeight = mousey - Ory;
} else {
drawX = Orx;
drawY = Ory;
OrWidth = mousex - Orx;
OrHeight = mousey - Ory;
public void setGraphicalDefaults(MouseEvent e) {
mousex = e.getX();
mousey = e.getY();
prevx = e.getX();
prevy = e.getY();
Orx = e.getX();
Ory = e.getY();
drawX = e.getX();
drawY = e.getY();
OrWidth = 0;
OrHeight = 0;
public void mouseDragged(MouseEvent e) {
updateMouseCoordinates(e);
switch (opStatus) {
public void mouseReleased(MouseEvent e) {
updateMouseCoordinates(e);
switch (opStatus) {}
public void mouseEntered(MouseEvent e) {
updateMouseCoordinates(e);
public void updateMouseCoordinates(MouseEvent e) {
String xCoor = "";
String yCoor = "";
if (e.getX() < 0)
xCoor = "0";
else {
xCoor = String.valueOf(e.getX());
if (e.getY() < 0)
xCoor = "0";
else {
yCoor = String.valueOf(e.getY());
mouseStatusBar.setText("x:" + xCoor + " y:" + yCoor);
public void mouseClicked(MouseEvent e) { updateMouseCoordinates(e); }
public void mouseExited(MouseEvent e) { updateMouseCoordinates(e); }
public void mouseMoved(MouseEvent e) { updateMouseCoordinates(e); }
public void mousePressed(MouseEvent e) { updateMouseCoordinates(e); }
public static void main(String[] args) {
IS wb = new IS();
wb.setDefaultCloseOperation(EXIT_ON_CLOSE);
wb.setSize(1024,740);
wb.setVisible(true);
private class DrawPanel extends JPanel {
private double m_zoom = 1.0;
private double m_zoomPercentage;
private BufferedImage m_image;
double theta = 0;
double thetaInc = Math.PI/2;
public DrawPanel(BufferedImage imageb,double zoomPercentage) {
m_image = imageb;
m_zoomPercentage = zoomPercentage / 100;
protected void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2d=(Graphics2D)g;
if(image == null)
initImage();
g2d.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
RenderingHints.VALUE_INTERPOLATION_BICUBIC);
int w = getWidth();
int h = getHeight();
int iw = image.getWidth();
int ih = image.getHeight();
if(scaleMode == SCALE) {
double x = (w - m_zoom*iw)/2;
double y = (h - m_zoom*ih)/2;
AffineTransform at = AffineTransform.getTranslateInstance(x, y);
at.rotate(theta,m_zoom*getWidth()/2,m_zoom*getHeight()/2);
at.scale(m_zoom, m_zoom);
g2d.drawRenderedImage(image, at);
else {
scaleImage(w, h, iw, ih);
private void scaleImage( int w, int h, int iw, int ih) {
Graphics2D g2d = image.createGraphics();
double xScale = (double)w/iw;
double yScale = (double)h/ih;
AffineTransform at = new AffineTransform();
if(scaleMode == DISTORT) {
double x = (w - xScale*iw)/2;
double y = (h - yScale*ih)/2;
at.setToTranslation(x, y);
at.scale(xScale, yScale);
} else {
double scale = (scaleMode == FIT) ? Math.min(xScale, yScale)
: Math.max(xScale, yScale);
double x = (w - scale*iw)/2;
double y = (h - scale*ih)/2;
at.setToTranslation(x, y);
at.scale(scale, scale);
g2d.drawRenderedImage(image, at);
public void zoom(int inc) {
m_zoom += inc * m_zoomPercentage;
repaint();
private void initImage() {
int w = getWidth();
int h = getHeight();
image = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);
Graphics2D g2 = image.createGraphics();
g2.setPaint(getBackground());
g2.fillRect(0,0,w,h);
g2.dispose();
} -
Make the panel fit the image so MouseListener only invoke when click image
I want to add MouseListener to only the image itself. So I draw the image onto a image panel, add that panel onto the main panel, then add the main panel onto the frame. However, my problem is that the size of my image panel is too large, it take up almost the entire frame. So my mouselistener response not only when I click onto the image, but also anywhere in my image panel. I try to resize the image panel to fit the size of my image, but no luck. Is there a solution for this. I feel like, it got something to do with the layout. Here is my code, if you mind read it. Thank you very much
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.Toolkit;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionListener;
import javax.swing.*;
public class ImageRotate
private static final String LABEL = "MIDI PROTOCOL";
private JPanel mainPanel = new JPanel();
private JPanel labelPanel = new JPanel();
public ImageRotate()
mainPanel.setOpaque(true);
mainPanel.setBackground(Color.YELLOW);
mainPanel.setLayout(new BorderLayout());
Font labelFont = new Font("serif", Font.BOLD, 30);
createLabelPanel(LABEL, labelFont);
labelPanel.setOpaque(false);
mainPanel.add(labelPanel, BorderLayout.NORTH);
Drawing d = new Drawing();
d.setOpaque(true);
d.addMouseListener(new MouseAdapter(){
public void mousePressed(MouseEvent e)
System.out.println("Pressing on the image");
d.addMouseMotionListener(new MouseAdapter(){
public void mouseDragged(MouseEvent e)
System.out.println("Dragging the image");
public void mouseMoved(MouseEvent e)
mainPanel.add(d, BorderLayout.CENTER);
private void createLabelPanel(String str, Font font)
JLabel label = new JLabel(str);
label.setFont(font);
label.setForeground(Color.RED);
labelPanel.add(label);
public JPanel getPanel()
return mainPanel;
public static void main(String args[])
JFrame frame = new JFrame();
frame.getContentPane().add(new ImageRotate().getPanel());
frame.setSize(new Dimension(300, 300));
frame.setVisible(true);
class Drawing extends JPanel
Image img;
public Drawing()
setSize(new Dimension(100,100)); //Try to make the panel fit the image...NO LUCK
setBackground(Color.GREEN);
img = Toolkit.getDefaultToolkit().createImage("images/nob.gif");
public void paintComponent(Graphics g)
super.paintComponent(g);
Graphics2D g2D = (Graphics2D)g;
g2D.drawImage(img, 40, 40, this);
}yunaeyes wrote:
In class Drawing extends JPanel, I did try to to set the panel to the image size but no luck there,
both setSize(new Dimension(100,100)), setPreferredSize(new Dimension(100,100)) does not make the panel smallerIt can be made to work. I find it hard to comment on unseen code.
>
BigDaddyLoveHandles wrote:
I think a better approach is to handle the mouse click properly -- see if the click is over the image or not.Can you elaborate on this?The mousePressed method you posted assumes you are over the image. Check the mouse coordinates! If the component is bigger than the image this may not be so. -
Can not add a picture to the JFrame from an ActionListener class
As topic says, I can not add a picture to the JFrame from an ActionListener class which is a class inside the JFrame class.
I have a Map.java class where I load an image with ImageIcon chosen with JFileChooser.
I my window class (main class), I have following:
class OpenImage_Listener implements ActionListener
public void actionPerformed(ActionEvent e)
int ans = open.showOpenDialog(MainProgram.this); // "open" is the JFileChooser reference
if(ans == open.APPROVE_OPTION)
File file = open.getSelectedFile();
MainProgram.this.add(new Map(file.getName()), BorderLayout.CENTER); // this line does not work - it does not add the choosen picture on the window,
//but if I add the picture outside this listener class and inside the MainProgram constructor, the picture apperas, but then I cannot use the JFileChooser.
showMessageDialog(MainProgram.this, fil.getName() ,"It works", INFORMATION_MESSAGE); // this popup works, and thereby the ActionListener also works.
}So why can�t I add a picture to the window from the above listener class?The SSCCE:
Ok, I think I solved it with the picture, but now I cannot add new components after adding the picture.
Look at the comment in the actionlistener class:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.io.*;
public class Test extends JFrame{
JButton b = new JButton("Open");
JFileChooser jfc = new JFileChooser(System.getProperty("user.dir"));
Picture pane;
Test(){
super("Main Program");
setLayout(new BorderLayout());
JPanel north = new JPanel();
add(north, BorderLayout.NORTH);
north.add(b);
b.addActionListener(new Listener());
setVisible(true);
setSize(500,500);
pane = new Picture("");
add(pane, BorderLayout.CENTER);
class Listener implements ActionListener {
public void actionPerformed(ActionEvent e){
int ans = jfc.showOpenDialog(Test.this);
if(ans == jfc.APPROVE_OPTION)
File file = jfc.getSelectedFile();
Test.this.add(new Picture(file.getName()), BorderLayout.CENTER);
pane.add(new JButton("NEW BUTTON")); // Why does this button not appear on the window???
pane.repaint();
pane.revalidate();
public static void main(String[] args)
Test t = new Test();
class Picture extends JPanel
Image pic;
String filename;
Picture(String filename)
setLayout(null);
this.filename = filename;
pic = Toolkit.getDefaultToolkit().getImage(filename);
protected void paintComponent(Graphics g)
super.paintComponent(g);
g.drawImage(pic,0,0,getWidth(),getHeight(),this);
revalidate();
} -
How to print the JFrame In The Center Of The Page?
hi there in the following code iam trying to print a JFrame
but the frame appear in the printed page at the top left
and i want it to appear in the top center of the page
how to do that?
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.awt.print.*;
class PrintUIWindow implements Printable, ActionListener {
JFrame frameToPrint;
public int print(Graphics g, PageFormat pf, int page) throws
PrinterException {
if (page > 0) {
return NO_SUCH_PAGE;
Graphics2D g2d = (Graphics2D)g;
g2d.translate(pf.getImageableX(), pf.getImageableY()-55);
frameToPrint.print(g);
return PAGE_EXISTS;
public void actionPerformed(ActionEvent e) {
PrinterJob job = PrinterJob.getPrinterJob();
job.setPrintable(this);
boolean ok = job.printDialog();
if (ok) {
try {
job.print();
} catch (PrinterException ex) {
public PrintUIWindow(JFrame f) {
frameToPrint = f;
public static void main(String args[]) {
UIManager.put("swing.boldMetal", Boolean.FALSE);
JFrame f = new JFrame("Print UI Example");
f.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {System.exit(0);}
JLabel label1=new JLabel("Selling Bill",JLabel.CENTER);
JLabel label2=new JLabel("Customer Name :Mahmoud Saleh ",JLabel.LEFT);
JLabel label3=new JLabel("Buying Date :29/8/2008 ",JLabel.LEFT);
JLabel label4=new JLabel("Book Buyed :Java Printing ",JLabel.LEFT);
JLabel label5=new JLabel("Number : 6 Copies ",JLabel.LEFT);
JLabel label6=new JLabel("Total Price :600 $ ",JLabel.LEFT);
label1.setFont(new Font("Courier New", Font.BOLD, 13));
label2.setFont(new Font("Courier New", Font.BOLD, 13));
label3.setFont(new Font("Courier New", Font.BOLD, 13));
label4.setFont(new Font("Courier New", Font.BOLD, 13));
label5.setFont(new Font("Courier New", Font.BOLD, 13));
label6.setFont(new Font("Courier New", Font.BOLD, 13));
JButton printButton = new JButton("Print This Window");
printButton.addActionListener(new PrintUIWindow(f));
JPanel panel=new JPanel();
panel.setLayout(new GridLayout(6,1));
panel.add(label1);
panel.add(label2);
panel.add(label3);
panel.add(label4);
panel.add(label5);
panel.add(label6);
f.setSize(300,300);
f.setLocationRelativeTo(null);
f.add(panel,BorderLayout.CENTER);
f.add(printButton,BorderLayout.SOUTH);
panel.setBackground(Color.WHITE);
f.setResizable(false);
f.setVisible(true);
}First_knight wrote:
please tell me am i thinking right
about this method: setImageableArea(.....)
public void setImageableArea(double x, double y, double width, double height);
like I said, I've tried this method and it doesn't seem to do anything.
the width=the JFrame Width,the height=the JFrame Height right?actually, when printing, 72 points (printing version of pixels) = 1 inch, so to do WYSIWYG, you need width = JFrameWidth * 72.0 / Toolkit.getToolkit().getScreenResolution. Ditto with height
upper left beginningx(0)---------------------------200--------------------------------600-----------------------------------y(1000)upper right beginningyou need to do something like PageSetup.getImageableX and do Graphics.translate(x,y);
also, if your page width = 720, that = 10 inches - that's a wide page (unless its in landscape)
so if i want the JFrame To Be In The Center Of The Page I Would Choose From x=200 ,y=600 depending that frame width is 400Actually, it would be 300 - 700 in your example
Because when i tried to use:setImageableArea(200, 600, 400, 200);like the above code
no changes occurs in the printed paperYes. You need to offset the Graphics object -
Resizing JFrame on button click to show an image on the JFrame
Dear All,
I have a JFrame which has an empty label. On button click I want to set an icon for the label and want the JFrame to be resized to show that icon. I am using frame.pack() and I am not using any other sizing function. The code that I have right now, prints the image on the panel, but does not resize the frame to show the image. Pleae could someone help.package gui;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
public class ComponentDemo extends JPanel implements ActionListener,
ItemListener, MouseListener, KeyListener {
private JTextArea textarea;
private JButton button;
private final static String newline = "\n";
private JLabel imageIcon;
public ComponentDemo() {
button = new JButton("JButton welcomes you to CO2001");
button.addActionListener(this);
add(button);
textarea = new JTextArea(10, 50);
textarea.setEditable(false);
addMouseListener(this);
textarea.addKeyListener(this);
JScrollPane scrollPane = new JScrollPane(textarea);
add(scrollPane);
imageIcon = new JLabel();
add(imageIcon);
setBackground(Color.pink);
new JScrollPane(this);
* Create the GUI and show it. For thread safety, this method should be
* invoked from the event-dispatching thread.
private static void createAndShowGUI() {
// Create and set up the window.
JFrame frame = new JFrame("Simple FrameDemo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
frame.setLocation(700, 200);
// get the content pane and set the background colour;
frame.add(new ComponentDemo());
// frame.setSize(screenSize);
// frame.getContentPane().setBackground(Color.cyan);
// Display the window.
frame.pack();
frame.setVisible(true);
frame.setResizable(true);
public static void main(String[] args) {
// Schedule a job for the event-dispatching thread:
// creating and showing this application's GUI.
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGUI();
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
if (e.getSource() instanceof JButton) {
// System.out.println(e.getSource());
String text = ((JButton) e.getSource()).getText();
textarea.append(text + newline);
textarea.setBackground(Color.cyan);
textarea.setForeground(Color.BLUE);
textarea.setCaretPosition(textarea.getDocument().getLength());
imageIcon.setIcon(createImageIcon("SwingingDuke.png",
"Image to be displayed"));
@Override
public void itemStateChanged(ItemEvent arg0) {
// TODO Auto-generated method stub
@Override
public void mouseClicked(MouseEvent arg0) {
textarea.append("A Mouse click welcomes you to CO2001" + newline);
textarea.setBackground(Color.green);
textarea.setCaretPosition(textarea.getDocument().getLength());
@Override
public void mouseEntered(MouseEvent arg0) {
// TODO Auto-generated method stub
@Override
public void mouseExited(MouseEvent arg0) {
// TODO Auto-generated method stub
@Override
public void mousePressed(MouseEvent arg0) {
// TODO Auto-generated method stub
@Override
public void mouseReleased(MouseEvent arg0) {
// TODO Auto-generated method stub
@Override
public void keyPressed(KeyEvent e) {
System.out.println(e.getKeyChar());
textarea.append("The key " + e.getKeyChar()
+ " click welcomes you to CO2001" + newline);
textarea.setBackground(Color.YELLOW);
textarea.setFont(new Font("Arial", Font.ITALIC, 16));
textarea.setCaretPosition(textarea.getDocument().getLength());
@Override
public void keyReleased(KeyEvent e) {
System.out.println(e.getKeyChar());
// textarea.append("The key "+
// e.getKeyChar()+" click welcomes you to CO2001" + newline);
// textarea.setBackground(Color.green);
// textarea.setCaretPosition(textarea.getDocument().getLength());
@Override
public void keyTyped(KeyEvent e) {
// TODO Auto-generated method stub
System.out.println(e.getKeyChar());
// textarea.append("The key "+
// e.getKeyChar()+" click welcomes you to CO2001" + newline);
// textarea.setBackground(Color.blue);
// textarea.setCaretPosition(textarea.getDocument().getLength());
/** Returns an ImageIcon, or null if the path was invalid. */
protected ImageIcon createImageIcon(String path, String description) {
java.net.URL imgURL = getClass().getResource(path);
if (imgURL != null) {
System.out.println("found");
return new ImageIcon(imgURL, description);
} else {
System.err.println("Couldn't find file: " + path);
return null;
}myJPanel.setPerferredSize(new Dimension(new_width, new_hight));
myJFrame.pack(); -
How to resize the components in a JFrame when the JFrame Resizes?
Hi all,
i have some problems with my app. I have set the JFrame resizable and that works fine for the JFrame but not for the components in the JFrame.
So my question is how can i set the components in a JFrame to resize automatically when the JFrame resizes?
Here are the important things from my code,...if you need more, just let me know, its my first post in a forum .
Its a JFrame with a JTabbedPane and on the Tabs are Panels with buttons and Tables.
Thank you in advance!
public class MainMonitor extends JFrame {
public MainMonitor() {
super();
initialize();
setVisible(true);
private void initialize() {
this.setSize(1145, 785);
this.setIconImage(Toolkit.getDefaultToolkit().getImage("Images/c.gif"));
this.setContentPane(getJContentPane());
this.setTitle("Company Manager");
this.setResizable(true);
this.setLocationRelativeTo(null);
private JPanel getJContentPane() {
if (jContentPane == null) {
jContentPane = new JPanel();
jContentPane.setLayout(null);
jContentPane.setOpaque(true);
jContentPane.add(getJTabbedPane(), null);
jContentPane.add(getJPanel11(), null);
return jContentPane;
private JTabbedPane getJTabbedPane() {
if (jTabbedPane == null) {
jTabbedPane = new JTabbedPane();
jTabbedPane.setLocation(new Point(6, 69));
jTabbedPane.setSize(new Dimension(1120, 684));
jTabbedPane.addTab("P", null, getJPanel(), null);
jTabbedPane.addTab("K", null, getJPanel1(), null);
jTabbedPane.addTab("B", null, getJPanel2(), null);
return jTabbedPane;
Giasaste wrote:
Thanks a lot, i didnt knew that the Layout Manager is a must.It's not a must, but it is the way to allow your app to be resized nicely and makes it much easier to maintain and enhance your program. Imagine creating a complex gui then later decide that you want another radiobutton and to remove a jlabel / jtextfield pair. with layout managers a chore becomes easy. -
Problem in displaying gif image on to the JFrame
i added gif image in to the jframe but when i run that image the image get distorted very much.
public class MyFrame extends JFrame
private static final String sIMAGE_PATH = "My\\Path\\To\\Image\\fileName.gif";
public MyFrame()
super("Frame with image on it");
init();
private void init()
JPanel panel = new JPanel(new BorderLayout());
ImageIcon image = new ImageIcon(sIMAGE_PATH);
JLabel label = new JLabel(image);
panel.add(label, BorderLayout.CENTER);
this.setContentPane(panel);
}Hope this helps.. -
Printing JPanel to fit one page, Urgent (thanks for help)..........
hi all,
I am trying to print and can't get the right scaling. My problem is if the JPanel that has lot of images inside it is too big to come on one page width and height then I want the print out to be on one page. If my panel's height is too large to fit on one page and the width is only half of the page or less than page half of the width. Then I want to scale it's height only to fit on one page while keeping the width the same during printing and the images also to be scaled accordingly. And if my height is too small lets say less than half the page and the width is too large too fit on one page then in this case I want to print the original height or keep the height to be shown on the printout as it looks on the screen but scale the width to fit on to one page and the images also to be scaled accordingly. But my following piece of code doesn't honor this though it fits on one page. It keeps on increasing the width or height to fit the whole page thought the width or height is less than that and the images are also expaned accordingly. I want to scale the images too and only fit the width or height if any is greater than one page. Any help is really appreciated. Thanks in advance
RepaintManager.currentManager(panel).setDoubleBufferingEnabled(false);
//Creates and returns a PrinterJob.
PrinterJob printerJob = PrinterJob.getPrinterJob();
Book book = new Book ();
PageFormat pf = printerJob.pageDialog(printerJob.defaultPage());
int pagecount = this.calculatePageCount(pf);
book.append (this, pf, pagecount);
// set pageable
printerJob.setPageable(book);
if (printerJob != null && printerJob.printDialog())
try
//this print() method implements the Printable interface
printerJob.print();
catch (Exception e)
e.printStackTrace();
public int print(Graphics graphics, PageFormat pageFormat, int pageIndex) throws PrinterException
if ( pageIndex >= 1 )
return NO_SUCH_PAGE;
Graphics2D g2 = (Graphics2D)graphics;
// leave room for a page number
double pageHeight = pageFormat.getImageableHeight();
double pageWidth = pageFormat.getImageableWidth();
double scaleFactorH = (panel.getSize().height)/(double)(pageFormat.getImageableHeight());
// set the clip to the size of one page
g2.setClip(0, 0, (int)pageWidth, (int)pageHeight);
// translate down the graphics object to the top of this page
g2.translate(0f, -pageIndex*pageHeight);
// scale to fit the width
g2.scale(scale,1.0/scaleFactorH);
panel.paint(g2);
return PAGE_EXISTS;
//method to calculate
public int calculatePageCount (PageFormat pf)
double pageHeight = pf.getImageableHeight();
double pageWidth = pf.getImageableWidth();
double componentWidth = panel.getSize().getWidth();
System.out.println("THe imageable width is " + pageWidth);
if (componentWidth > pageWidth)
scale = pageWidth / panel.getWidth();
double componentHeight = panel.getSize().getHeight() * scale;
printPageCount = (int)Math.round(Math.ceil (componentHeight/pageHeight));
return printPageCount;
Is there a way to fix this any help is appreciated.
ThanksDear Nadia,
Thanks for the info.
If I understand it correct I can make a copy of my actual css file.
Rename it this copy to e.g. print.css
And then make some changes such a letter fonts and colour
Linking this css file to my pages and specify it is only for `print1`
Right?
I`m using a template so if I amend the template like this and have all pages updated automatically that should do the trick?
Right?
Is there somewhere where I need to mention that e.g. the page needs to be reduced onto 95% by printing?
Or will the print.css do the trick?
Sometimes I get confused on what css can do and it can do a lot.
Many thanks for helping me out here.
Kind regards
martine -
Automatic placement of components on to the JFrame.
Hello I want to know if it is possible to have a button in my program and when this button is pressed by the user it automatically places about 3 JFormattedtextfields on to the JFrame? If so how do I go about writing code for this?
Well I am trying to have a check box so that only selected components are deleted. At the moment I am trying to item listener to the check box. I had a look at the checkbox demo and I did the exact same thing but mine does'nt seem to work I don't want to proceed with the remove clients method before this is sorted out. Can someone please point out my mistake to me and suggest ways to correct it.
import net.miginfocom.swing.MigLayout;
import javax.swing.*;*
*import java.awt.event.*;
public class LayOut {
//Labels to identify the fields
JLabel currentLabel = new JLabel("Current");
JLabel systemVoltageLabel = new JLabel ("Voltage");
JLabel kVALabel = new JLabel ("KVA");
//The button
JButton addClients = new JButton("Add Clients");
JButton removeClients = new JButton("Remove Clients");
// the panel
JPanel mainPanel = new JPanel();
// the JFrame
JFrame frame = new JFrame("Runtime test software");
public LayOut() {
mainPanel.setLayout(new MigLayout());
mainPanel.add(addClients, "wrap");
addClients.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
addClients();
removeClients.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
removeClients();
frame.add(mainPanel);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(500,500);
frame.setVisible(true);
public void addClients() {
mainPanel.add(new JCheckBox());
mainPanel.add(new JFormattedTextField(),"width 20:80");
mainPanel.add(new JFormattedTextField(),"gapleft 30, width 20:80");
mainPanel.add(new JFormattedTextField(),"gapleft 30, width 20:80, wrap");
mainPanel.revalidate();
mainPanel.validate();
public void removeClients() {
JCheckBox.addItemListener(this); // this is how it is done in the check box tutorial
mainPanel.revalidate();
mainPanel.validate();
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l = new LayOut();
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Problems painting a JPanel component on a JFrame
Hi.
I've built a subclass of JPanel that has some controls on it, such as JPanels, JCheckBoxes, images, etc. I need to repaint this JPanel periodically because its contents are constantly changing.
I have it added to a main JFrame (this JFrame has also other JPanels in other locations of its content pane), and when I try to repaint this JPanel, it does not seem to be double buffered, because it momentaneously repaints other parts of the window into the JPanel region, and after that it repaints what it should.
I have tested a Panel instead of a JPanel to do the same task, and the Panel works fine.
Basically, the code is:
public class MyFrame extends JFrame
JPanel myPanel = new JPanel();
JPanel myPanel2 = new JPanel();
JPanel myPanel3 = new JPanel();
public MyFrame()
getContentPane().setLayout(null);
getContentPane().setSize(600, 400);
myPanel.setBounds(0, 0, 200, 200);
myPanel2.setBounds(0, 200, 200, 200);
myPanel3.setBounds(0, 400, 200, 100);
getContentPane().add(myPanel);
getContentPane().add(myPanel2);
getContentPane().add(myPanel3);
// javax.swing.Timer to update myPanel
Timer t = new Timer( 2000, new ActionListener() {
public void actionPerformed(ActionEvent e) {
myPanel.repaint();
t.start();
I actually use othe class names and field names, but the structure is basically the same.
Any idea of what am I doing wrong? Why Panels work fine in the same situation, into the same JFrame?
Thank you.Try constructing your JPanels as doublebuffered then. (new JPanel(A layoutmanager, true)). The latter parameter is a boolean for creating a doublebuffered JPanel or not. Try with calling myPanel.revalidate() after repainting.
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"Stretching" a JPanel to fit a space ?
Howdy,
I have what I hope is a simple problem (hope I am not a simpleton for missing the answer). I have a JTabbedPane that I add JPanels to at runtime (of course), but actually I have subclassed JPanel, and add a JScrollPane, containing a JTextArea to it, then I add the tab.
But the panel size in the tab is dependent on the size of the JTextArea... and I can't hard-code it, as the main window starts sized to the screen size... Is there some way to initialize the scrollpane/textarea/panel combonation to stretch to fit the tab it is placed in? any help would be muc appreciated, as I have tried a number of methods using bounds, dimensions, passing these in as args to my subclass's constructor....
I appreciate any help.here is what I am trying to do, more precisely:
have tabbed panes, each tabbed pane has 2 JTextAreas in it, one for line numbers (down the left, 3 or four columns wide) and one that is editable. these two should be "inside" a scrollpane. so to add both of them to a single scrollpane, don't I have to put them in some other container? I did in fact try adding just a JTextArea to a scrollpane and adding that to the tabbed pane, and that does the trick, but no line numbers... something i feel rather strongly about. dollars for help so far though. thanks. -
Adding .jpg image to the JFrame
I want to add an image in the JFrame
My code is as follows:
import java.awt.*;
import javax.swing.*;
public class test extends JPanel
JProgressBar pb1 = new JProgressBar(JProgressBar.HORIZONTAL,0,100);
public test(String image)
ImageIcon imgIco = new ImageIcon(image);
JLabel imgLbl = new JLabel(imgIco);
imgLbl.setPreferredSize(new Dimension(500,500));
JPanel p1 = new JPanel();
p1.add(pb1);
setLayout(new GridLayout(1,1));
add(imgLbl);
add(p1);
public void salman()
int i=0;
while(i<=100)
try
pb1.setValue(i);
pb1.setForeground(Color.lightGray);
pb1.setBackground(Color.blue);
pb1.setBorderPainted(true);
pb1.setStringPainted(true);
Thread.sleep(55);
catch(Exception e)
System.out.println("Exception Occured!!!");
i++;
public static void main(String[] args)
JFrame f = new JFrame();
test img = new test("pills.jpg");
f.getContentPane().add(img);
f.setSize(450,470);
f.setVisible(true);
img.salman();
Thanks for you co-operation.
Regards
Salman Pirzadayou use
test img = new test("pills.jpg");where it finds pills.jpg????
try something like this:
String imageName = "pills.jpg";
img = Toolkit.getDefaultToolkit().getImage(Test.class.getResource(imageName));And make sure, pills.jpg is in the same directory where Test class is
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